I have some code that takes 3 different PDF byte arrays and merges them. This code works great. The issue (some people) are having is that each PDF is considered to be a full page (if printed) even if there is only say 4 inches of content on it, thus leaving 7 inches of white space vertically. Then the middle document gets put in and may or may not have vertical white space at the end of it. Then the footer gets put on its own page as well.
Here is the code:
byte[] Bytes = rv.LocalReport.Render("PDF", null, out MimeType, out Encoding, out Extension, out StreamIDs, out Warnings);
List<byte[]> MergeSets = // This is filled prior to this code
// Append any other pages to this primary letter
if (MergeSets.Count > 0) {
MemoryStream ms = new MemoryStream();
Document document = new Document();
PdfCopy copy = new PdfCopy(document, ms);
document.Open();
PdfImportedPage page;
PdfReader reader = new PdfReader(Bytes); // read the generated primary Letter
int pages = reader.NumberOfPages;
for (int i = 0; i < pages; ) {
page = copy.GetImportedPage(reader, ++i);
copy.AddPage(page);
} // foreach of the pages in the Cover Letter
// Now append the merge sets
foreach (byte[] ba in MergeSets) {
reader = new PdfReader(ba);
pages = reader.NumberOfPages;
for (int i = 0; i < pages; ) {
page = copy.GetImportedPage(reader, ++i);
copy.AddPage(page);
} // foreach of the pages in the current merge set
} // foreach of the sets of data
document.Close();
ServerSaved = SaveGeneratedLetter(ms.GetBuffer(), DateTime.Now.Year, hl.LetterName, SaveName);
} // if there is anything to merge
Is there a way when I am merging each page to clip/remove/erase the vertical white space at the end of each pdf so it appears as one seamless document?
UPDATE:
Here are some sample .pdf files I am trying to merge.
header, body, footer
UPDATE 2: USING THE ANSWER:
I have converted #mkl's code to C# and here it is.
The tool class:
public class PdfVeryDenseMergeTool {
private Rectangle PageSize;
private float TopMargin;
private float BottomMargin;
private float Gap;
private Document Document = null;
private PdfWriter Writer = null;
private float YPosition = 0;
public PdfVeryDenseMergeTool(Rectangle size, float top, float bottom, float gap) {
this.PageSize = size;
this.TopMargin = top;
this.BottomMargin = bottom;
this.Gap = gap;
} // PdfVeryDenseMergeTool
public void Merge(MemoryStream outputStream, List<PdfReader> inputs) {
try {
this.OpenDocument(outputStream);
foreach (PdfReader reader in inputs) {
this.Merge(reader);
} // foreach of the PDF files to merge
} finally {
this.CloseDocument();
} // try-catch-finally
} // Merge
public void OpenDocument(MemoryStream outputStream) {
this.Document = new Document(PageSize, 36, 36, this.TopMargin, this.BottomMargin);
this.Writer = PdfWriter.GetInstance(Document, outputStream);
this.Document.Open();
this.NewPage();
} // OpenDocument
public void CloseDocument() {
try {
this.Document.Close();
} finally {
this.Document = null;
this.Writer = null;
this.YPosition = 0;
} // try-finally
} // CloseDocument
public void NewPage() {
this.Document.NewPage();
this.YPosition = PageSize.GetTop(this.TopMargin);
} // Merge
public void Merge(PdfReader reader) {
PdfReaderContentParser parser = new PdfReaderContentParser(reader);
for (int pageIndex = 1; pageIndex <= reader.NumberOfPages; pageIndex++) {
this.Merge(reader, parser, pageIndex);
} // foreach of the pages of the current PDF
} // Merge
public void Merge(PdfReader reader, PdfReaderContentParser parser, int pageIndex) {
PdfImportedPage importedPage = Writer.GetImportedPage(reader, pageIndex);
PdfContentByte directContent = Writer.DirectContent;
PageVerticalAnalyzer finder = parser.ProcessContent(pageIndex, new PageVerticalAnalyzer());
if (finder.VerticalFlips.Count < 2)
return;
Rectangle pageSizeToImport = reader.GetPageSize(pageIndex);
int startFlip = finder.VerticalFlips.Count - 1;
bool first = true;
while (startFlip > 0) {
if (!first)
this.NewPage();
float freeSpace = this.YPosition - PageSize.GetBottom(BottomMargin);
int endFlip = startFlip + 1;
while ((endFlip > 1) && (finder.VerticalFlips[startFlip] - finder.VerticalFlips[endFlip - 2] < freeSpace))
endFlip -= 2;
if (endFlip < startFlip) {
float height = finder.VerticalFlips[startFlip] - finder.VerticalFlips[endFlip];
directContent.SaveState();
directContent.Rectangle(0, this.YPosition - height, pageSizeToImport.Width, height);
directContent.Clip();
directContent.NewPath();
this.Writer.DirectContent.AddTemplate(importedPage, 0, this.YPosition - (finder.VerticalFlips[startFlip] - pageSizeToImport.Bottom));
directContent.RestoreState();
this.YPosition -= height + this.Gap;
startFlip = endFlip - 1;
} else if (!first) {
throw new ArgumentException(string.Format("Page {0} content too large", pageIndex));
} // if
first = false;
} // while
} // Merge
} // PdfVeryDenseMergeTool
The RenderListener class:
UPDATE 3: FIXED 1 LINE OF CODE AND IT WORKS: See comment in code
public class PageVerticalAnalyzer : IRenderListener {
public PageVerticalAnalyzer() { }
public List<float> VerticalFlips = new List<float>();
public void AddVerticalUseSection(float from, float to) {
if (to < from) {
float temp = to;
to = from;
from = temp;
}
int i = 0;
int j = 0;
for (i = 0; i < VerticalFlips.Count; i++) {
float flip = VerticalFlips[i];
if (flip < from)
continue;
for (j = i; j < VerticalFlips.Count; j++) {
flip = VerticalFlips[j];
if (flip < to)
continue;
break;
}
break;
} // foreach of the vertical flips
bool fromOutsideInterval = i % 2 == 0;
bool toOutsideInterval = j % 2 == 0;
while (j-- > i)
VerticalFlips.RemoveAt(j); // This was the problem line with just .Remove(j)
if (toOutsideInterval)
VerticalFlips.Insert(i, to);
if (fromOutsideInterval)
VerticalFlips.Insert(i, from);
} // AddVerticalUseSection
public void BeginTextBlock() { /* Do nothing */ }
public void EndTextBlock() { /* Do nothing */ }
public void RenderImage(ImageRenderInfo renderInfo) {
Matrix ctm = renderInfo.GetImageCTM();
List<float> YCoords = new List<float>(4) { 0, 0, 0, 0 };
for (int x = 0; x < 2; x++) {
for (int y = 0; y < 2; y++) {
Vector corner = new Vector(x, y, 1).Cross(ctm);
YCoords[2 * x + y] = corner[Vector.I2];
}
}
YCoords.Sort();
AddVerticalUseSection(YCoords[0], YCoords[3]);
} // RenderImage
public void RenderText(TextRenderInfo renderInfo) {
LineSegment ascentLine = renderInfo.GetAscentLine();
LineSegment descentLine = renderInfo.GetDescentLine();
List<float> YCoords = new List<float>(4) {
ascentLine.GetStartPoint()[Vector.I2],
ascentLine.GetEndPoint()[Vector.I2],
descentLine.GetStartPoint()[Vector.I2],
descentLine.GetEndPoint()[Vector.I2],
};
YCoords.Sort();
AddVerticalUseSection(YCoords[0], YCoords[3]);
} // RenderText
} // PageVericalAnalyzer
Code to gather files and run the tool:
public void TestMergeDocuments() {
PdfVeryDenseMergeTool tool = new PdfVeryDenseMergeTool(iTextSharp.text.PageSize.A4, 18, 18, 10);
List<byte[]> Files = new List<byte[]>();
// Code to load each of the 3 files I need into this byte array list
using (MemoryStream ms = new MemoryStream()) {
List<PdfReader> files = new List<PdfReader>();
foreach (byte[] ba in Files) {
files.Add(new PdfReader(ba));
} // foreach of the sets of data
tool.Merge(ms, files);
// Save the file using: ms.GetBuffer()
} // using the memory stream
} // TestMergeDocuments
The following sample tool has been implemented along the ideas of the tool PdfDenseMergeTool from this answer which the OP has commented to be SO close to what [he] NEEDs. Just like PdfDenseMergeTool this tool here is implemented in Java/iText which I'm more at home with than C#/iTextSharp. As the OP has already translated PdfDenseMergeTool to C#/iTextSharp, translating this tool here also should not be too great a problem.
PdfVeryDenseMergeTool
This tool similarly to PdfDenseMergeTool takes the page contents of pages from a number of PdfReader instances and tries to merge them densely, i.e. putting contents of multiple source pages onto a single target page if there is enough free space to do so. In contrast to that earlier tool, this tool even splits source page contents to allow for an even denser merge.
Just like that other tool the PdfVeryDenseMergeTool does not take vector graphics into account because the iText(Sharp) parsing API does only forward text and bitmap images
The PdfVeryDenseMergeTool splits source pages which do not completely fit onto a target page at a horizontal line which is not intersected by the bounding boxes of text glyphs or bitmap graphics.
The tool class:
public class PdfVeryDenseMergeTool
{
public PdfVeryDenseMergeTool(Rectangle size, float top, float bottom, float gap)
{
this.pageSize = size;
this.topMargin = top;
this.bottomMargin = bottom;
this.gap = gap;
}
public void merge(OutputStream outputStream, Iterable<PdfReader> inputs) throws DocumentException, IOException
{
try
{
openDocument(outputStream);
for (PdfReader reader: inputs)
{
merge(reader);
}
}
finally
{
closeDocument();
}
}
void openDocument(OutputStream outputStream) throws DocumentException
{
final Document document = new Document(pageSize, 36, 36, topMargin, bottomMargin);
final PdfWriter writer = PdfWriter.getInstance(document, outputStream);
document.open();
this.document = document;
this.writer = writer;
newPage();
}
void closeDocument()
{
try
{
document.close();
}
finally
{
this.document = null;
this.writer = null;
this.yPosition = 0;
}
}
void newPage()
{
document.newPage();
yPosition = pageSize.getTop(topMargin);
}
void merge(PdfReader reader) throws IOException
{
PdfReaderContentParser parser = new PdfReaderContentParser(reader);
for (int page = 1; page <= reader.getNumberOfPages(); page++)
{
merge(reader, parser, page);
}
}
void merge(PdfReader reader, PdfReaderContentParser parser, int page) throws IOException
{
PdfImportedPage importedPage = writer.getImportedPage(reader, page);
PdfContentByte directContent = writer.getDirectContent();
PageVerticalAnalyzer finder = parser.processContent(page, new PageVerticalAnalyzer());
if (finder.verticalFlips.size() < 2)
return;
Rectangle pageSizeToImport = reader.getPageSize(page);
int startFlip = finder.verticalFlips.size() - 1;
boolean first = true;
while (startFlip > 0)
{
if (!first)
newPage();
float freeSpace = yPosition - pageSize.getBottom(bottomMargin);
int endFlip = startFlip + 1;
while ((endFlip > 1) && (finder.verticalFlips.get(startFlip) - finder.verticalFlips.get(endFlip - 2) < freeSpace))
endFlip -=2;
if (endFlip < startFlip)
{
float height = finder.verticalFlips.get(startFlip) - finder.verticalFlips.get(endFlip);
directContent.saveState();
directContent.rectangle(0, yPosition - height, pageSizeToImport.getWidth(), height);
directContent.clip();
directContent.newPath();
writer.getDirectContent().addTemplate(importedPage, 0, yPosition - (finder.verticalFlips.get(startFlip) - pageSizeToImport.getBottom()));
directContent.restoreState();
yPosition -= height + gap;
startFlip = endFlip - 1;
}
else if (!first)
throw new IllegalArgumentException(String.format("Page %s content sections too large.", page));
first = false;
}
}
Document document = null;
PdfWriter writer = null;
float yPosition = 0;
final Rectangle pageSize;
final float topMargin;
final float bottomMargin;
final float gap;
}
(PdfVeryDenseMergeTool.java)
This tool makes use of a custom RenderListener for use with the iText parser API:
public class PageVerticalAnalyzer implements RenderListener
{
#Override
public void beginTextBlock() { }
#Override
public void endTextBlock() { }
/*
* #see RenderListener#renderText(TextRenderInfo)
*/
#Override
public void renderText(TextRenderInfo renderInfo)
{
LineSegment ascentLine = renderInfo.getAscentLine();
LineSegment descentLine = renderInfo.getDescentLine();
float[] yCoords = new float[]{
ascentLine.getStartPoint().get(Vector.I2),
ascentLine.getEndPoint().get(Vector.I2),
descentLine.getStartPoint().get(Vector.I2),
descentLine.getEndPoint().get(Vector.I2)
};
Arrays.sort(yCoords);
addVerticalUseSection(yCoords[0], yCoords[3]);
}
/*
* #see RenderListener#renderImage(ImageRenderInfo)
*/
#Override
public void renderImage(ImageRenderInfo renderInfo)
{
Matrix ctm = renderInfo.getImageCTM();
float[] yCoords = new float[4];
for (int x=0; x < 2; x++)
for (int y=0; y < 2; y++)
{
Vector corner = new Vector(x, y, 1).cross(ctm);
yCoords[2*x+y] = corner.get(Vector.I2);
}
Arrays.sort(yCoords);
addVerticalUseSection(yCoords[0], yCoords[3]);
}
/**
* This method marks the given interval as used.
*/
void addVerticalUseSection(float from, float to)
{
if (to < from)
{
float temp = to;
to = from;
from = temp;
}
int i=0, j=0;
for (; i<verticalFlips.size(); i++)
{
float flip = verticalFlips.get(i);
if (flip < from)
continue;
for (j=i; j<verticalFlips.size(); j++)
{
flip = verticalFlips.get(j);
if (flip < to)
continue;
break;
}
break;
}
boolean fromOutsideInterval = i%2==0;
boolean toOutsideInterval = j%2==0;
while (j-- > i)
verticalFlips.remove(j);
if (toOutsideInterval)
verticalFlips.add(i, to);
if (fromOutsideInterval)
verticalFlips.add(i, from);
}
final List<Float> verticalFlips = new ArrayList<Float>();
}
(PageVerticalAnalyzer.java)
It is used like this:
PdfVeryDenseMergeTool tool = new PdfVeryDenseMergeTool(PageSize.A4, 18, 18, 5);
tool.merge(output, inputs);
(VeryDenseMerging.java)
Applied to the OP's sample documents
Header.pdf
Body.pdf
Footer.pdf
it generates
If one defines the target document page size to be A5 landscape:
PdfVeryDenseMergeTool tool = new PdfVeryDenseMergeTool(new RectangleReadOnly(595,421), 18, 18, 5);
tool.merge(output, inputs);
(VeryDenseMerging.java)
it generates this:
Beware! This is only a proof of concept and it does not consider all possibilities. E.g. the case of source or target pages with a non-trivial Rotate value is not properly handled. Thus, it is not ready for production use yet.
Improvement in current (5.5.6 SNAPSHOT) iText version
The current iText development version towards 5.5.6 enhances the parser functionality to also signal vector graphics. Thus, I extended the PageVerticalAnalyzer to make use of this:
public class PageVerticalAnalyzer implements ExtRenderListener
{
#Override
public void beginTextBlock() { }
#Override
public void endTextBlock() { }
#Override
public void clipPath(int rule) { }
...
static class SubPathSection
{
public SubPathSection(float x, float y, Matrix m)
{
float effectiveY = getTransformedY(x, y, m);
pathFromY = effectiveY;
pathToY = effectiveY;
}
void extendTo(float x, float y, Matrix m)
{
float effectiveY = getTransformedY(x, y, m);
if (effectiveY < pathFromY)
pathFromY = effectiveY;
else if (effectiveY > pathToY)
pathToY = effectiveY;
}
float getTransformedY(float x, float y, Matrix m)
{
return new Vector(x, y, 1).cross(m).get(Vector.I2);
}
float getFromY()
{
return pathFromY;
}
float getToY()
{
return pathToY;
}
private float pathFromY;
private float pathToY;
}
/*
* Beware: The implementation is not correct as it includes the control points of curves
* which may be far outside the actual curve.
*
* #see ExtRenderListener#modifyPath(PathConstructionRenderInfo)
*/
#Override
public void modifyPath(PathConstructionRenderInfo renderInfo)
{
Matrix ctm = renderInfo.getCtm();
List<Float> segmentData = renderInfo.getSegmentData();
switch (renderInfo.getOperation())
{
case PathConstructionRenderInfo.MOVETO:
subPath = null;
case PathConstructionRenderInfo.LINETO:
case PathConstructionRenderInfo.CURVE_123:
case PathConstructionRenderInfo.CURVE_13:
case PathConstructionRenderInfo.CURVE_23:
for (int i = 0; i < segmentData.size()-1; i+=2)
{
if (subPath == null)
{
subPath = new SubPathSection(segmentData.get(i), segmentData.get(i+1), ctm);
path.add(subPath);
}
else
subPath.extendTo(segmentData.get(i), segmentData.get(i+1), ctm);
}
break;
case PathConstructionRenderInfo.RECT:
float x = segmentData.get(0);
float y = segmentData.get(1);
float w = segmentData.get(2);
float h = segmentData.get(3);
SubPathSection section = new SubPathSection(x, y, ctm);
section.extendTo(x+w, y, ctm);
section.extendTo(x, y+h, ctm);
section.extendTo(x+w, y+h, ctm);
path.add(section);
case PathConstructionRenderInfo.CLOSE:
subPath = null;
break;
default:
}
}
/*
* #see ExtRenderListener#renderPath(PathPaintingRenderInfo)
*/
#Override
public Path renderPath(PathPaintingRenderInfo renderInfo)
{
if (renderInfo.getOperation() != PathPaintingRenderInfo.NO_OP)
{
for (SubPathSection section : path)
addVerticalUseSection(section.getFromY(), section.getToY());
}
path.clear();
subPath = null;
return null;
}
List<SubPathSection> path = new ArrayList<SubPathSection>();
SubPathSection subPath = null;
...
}
(PageVerticalAnalyzer.java)
A simple test (VeryDenseMerging.java method testMergeOnlyGraphics) merges these files
into this:
But once again beware: this is a mere proof of concept. Especially modifyPath() needs to be improved, the implementation is not correct as it includes the control points of curves which may be far outside the actual curve.
Related
I have this .java datafile. The data file is a part of an imagej plugin.
The whole data structure is here:
enter link description here
package mosaic.plugins;
import ij.IJ;
import ij.ImagePlus;
import ij.macro.Interpreter;
import ij.measure.ResultsTable;
import ij.process.ByteProcessor;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Map;
import java.util.Map.Entry;
import java.util.TreeMap;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JPanel;
import javax.swing.JTextPane;
import javax.swing.WindowConstants;
import mosaic.plugins.utils.PlugIn8bitBase;
import net.imglib2.Cursor;
import net.imglib2.IterableInterval;
import net.imglib2.RandomAccess;
import net.imglib2.img.ImagePlusAdapter;
import net.imglib2.img.Img;
import net.imglib2.img.ImgFactory;
import net.imglib2.img.array.ArrayImgFactory;
import net.imglib2.img.display.imagej.ImageJFunctions;
import net.imglib2.type.NativeType;
import net.imglib2.type.numeric.NumericType;
import net.imglib2.type.numeric.RealType;
import net.imglib2.type.numeric.integer.UnsignedByteType;
import net.imglib2.type.numeric.real.FloatType;
import net.imglib2.view.IntervalView;
import net.imglib2.view.Views;
public class Naturalization extends PlugIn8bitBase
{
// Precision in finding your best T
private static final float EPS = 0.0001f;
// Prior parameter for first oder
// In this case is for all channels
// Fixed parameter
private static final float T1_pr = 0.3754f;
// Number of bins for the Laplacian Histogram
// In general is 4 * N_Grad
// max of laplacian value is 4 * 255
private static final int N_Lap = 2041;
// Offset shift in the histogram bins
// Has to be N_Lap / 2;
private static final int Lap_Offset = 1020;
// Number of bins for the Gradient
private static final int N_Grad = 512;
// Offset for the gradient histogram shift
private static final int Grad_Offset = 256;
// Prior parameter for second order (Parameters learned from trained data set)
// For different color R G B
// For one channel image use an average of them
private final float T2_pr[] = {0.2421f ,0.2550f, 0.2474f, 0.24816666f};
// Keeps values of PSNR for all images and channels in case of RGB. Maps: imageNumber -> map (channel, PSNR value)
private final Map<Integer, Map<Integer, Float>> iPsnrOutput = new TreeMap<Integer, Map<Integer, Float>>();
private synchronized void addPsnr(int aSlice, int aChannel, float aValue) {
Map<Integer, Float> map = iPsnrOutput.get(aSlice);
boolean isNewMap = false;
if (map == null) {
map = new TreeMap<Integer, Float>();
isNewMap = true;
}
map.put(aChannel, aValue);
if (isNewMap) {
iPsnrOutput.put(aSlice, map);
}
}
#Override
protected void processImg(ByteProcessor aOutputImg, ByteProcessor aOrigImg, int aChannelNumber) {
// perform naturalization
final ImagePlus naturalizedImg = naturalize8bitImage(aOrigImg, aChannelNumber);
// set processed pixels to output image
aOutputImg.setPixels(naturalizedImg.getProcessor().getPixels());
}
#Override
protected void postprocessBeforeShow() {
// Create result table with all stored PSNRs.
final ResultsTable rs = new ResultsTable();
for (final Entry<Integer, Map<Integer, Float>> e : iPsnrOutput.entrySet()) {
rs.incrementCounter();
for (final Entry<Integer, Float> m : e.getValue().entrySet()) {
switch(m.getKey()) {
case CHANNEL_R: rs.addValue("Naturalization R", m.getValue()); rs.addValue("Estimated R PSNR", calculate_PSNR(m.getValue())); break;
case CHANNEL_G: rs.addValue("Naturalization G", m.getValue()); rs.addValue("Estimated G PSNR", calculate_PSNR(m.getValue())); break;
case CHANNEL_B: rs.addValue("Naturalization B", m.getValue()); rs.addValue("Estimated B PSNR", calculate_PSNR(m.getValue())); break;
case CHANNEL_8G: rs.addValue("Naturalization", m.getValue()); rs.addValue("Estimated PSNR", calculate_PSNR(m.getValue())); break;
default: break;
}
}
}
if (!Interpreter.isBatchMode()) {
rs.show("Naturalization and PSNR");
showMessage();
}
}
private ImagePlus naturalize8bitImage(ByteProcessor imp, int aChannelNumber) {
Img<UnsignedByteType> TChannel = ImagePlusAdapter.wrap(new ImagePlus("", imp));
final float T2_prior = T2_pr[(aChannelNumber <= CHANNEL_B) ? 2-aChannelNumber : CHANNEL_8G];
final float[] result = {0.0f}; // ugly but one of ways to get result back via parameters;
// Perform naturalization and store PSNR result. Finally return image in ImageJ format.
TChannel = performNaturalization(TChannel, T2_prior, result);
addPsnr(imp.getSliceNumber(), aChannelNumber, result[0]);
return ImageJFunctions.wrap(TChannel,"temporaryName");
}
/**
* Naturalize the image
* #param Img original image
* #param Theta parameter
* #param Class<T> Original image
* #param Class<S> Calculation Type
* #param T2_prior Prior to use
* #param result One element array to store nautralization factor
*/
private <T extends NumericType<T> & NativeType<T> & RealType<T>, S extends RealType<S>> Img<T> doNaturalization(Img<T> image_orig, S Theta,Class<T> cls_t, float T2_prior, float[] result) throws InstantiationException, IllegalAccessException
{
if (image_orig == null) {return null;}
// Check that the image data set is 8 bit
// Otherwise return an error or hint to scale down
final T image_check = cls_t.newInstance();
final Object obj = image_check;
if (!(obj instanceof UnsignedByteType)) {
IJ.error("Error it work only with 8-bit type");
return null;
}
final float Nf = findNaturalizationFactor(image_orig, Theta, T2_prior);
result[0] = Nf;
final Img<T> image_result = naturalizeImage(image_orig, Nf, cls_t);
return image_result;
}
private <S extends RealType<S>, T extends NumericType<T> & NativeType<T> & RealType<T>>
Img<T> naturalizeImage(Img<T> image_orig, float Nf, Class<T> cls_t)
throws InstantiationException, IllegalAccessException
{
// Mean of the original image
// S mean_original = cls_s.newInstance();
// Mean<T,S> m = new Mean<T,S>();
// m.compute(image_orig.cursor(), mean_original);
// TODO: quick fix for deprecated code above. Is new 'mean' utility introduced in imglib2?
float mean_original = 0.0f;
final Cursor<T> c2 = image_orig.cursor();
float count = 0.0f;
while (c2.hasNext()) {
c2.next();
mean_original += c2.get().getRealFloat();
count += 1.0f;
}
mean_original /= count;
// Create result image
final long[] origImgDimensions = new long[2];
image_orig.dimensions(origImgDimensions);
final Img<T> image_result = image_orig.factory().create(origImgDimensions, cls_t.newInstance());
// for each pixel naturalize
final Cursor<T> cur_orig = image_orig.cursor();
final Cursor<T> cur_ir = image_result.cursor();
while (cur_orig.hasNext()) {
cur_orig.next();
cur_ir.next();
final float tmp = cur_orig.get().getRealFloat();
// Naturalize
float Nat = (int) ((tmp - mean_original)*Nf + mean_original + 0.5);
if (Nat < 0)
{Nat = 0;}
else if (Nat > 255)
{Nat = 255;}
cur_ir.get().setReal(Nat);
}
return image_result;
}
private <S extends RealType<S>, T extends NumericType<T> & NativeType<T> & RealType<T>> float findNaturalizationFactor(Img<T> image_orig, S Theta, float T2prior) {
final ImgFactory<FloatType> imgFactoryF = new ArrayImgFactory<FloatType>();
// Create one dimensional image (Histogram)
final Img<FloatType> LapCDF = imgFactoryF.create(new long[] {N_Lap}, new FloatType());
// Two dimensional image for Gradient
final Img<FloatType> GradCDF = imgFactoryF.create(new long[] {N_Grad, 2}, new FloatType());
// GradientCDF = Integral of the histogram of the of the Gradient field
// LaplacianCDF = Integral of the Histogram of the Laplacian field
final Img<FloatType> GradD = create2DGradientField();
calculateLaplaceFieldAndGradient(image_orig, LapCDF, GradD);
convertGrad2dToCDF(GradD);
calculateGradCDF(GradCDF, GradD);
calculateLapCDF(LapCDF);
// For each channel find the best T1
// EPS=precision
// for X component
float T_tmp = (float)FindT(Views.iterable(Views.hyperSlice(GradCDF, GradCDF.numDimensions()-1 , 0)), N_Grad, Grad_Offset, EPS);
// for Y component
T_tmp += FindT(Views.iterable(Views.hyperSlice(GradCDF, GradCDF.numDimensions()-1 , 1)), N_Grad, Grad_Offset, EPS);
// Average them and divide by the prior parameter
final float T1 = T_tmp/(2*T1_pr);
// Find the best parameter and divide by the T2 prior
final float T2 = (float)FindT(LapCDF, N_Lap, Lap_Offset, EPS)/T2prior;
// Calculate naturalization factor!
final float Nf = (float) ((1.0-Theta.getRealDouble())*T1 + Theta.getRealDouble()*T2);
return Nf;
}
/**
* Calculate the peak SNR from the Naturalization factor
*
* #param Nf naturalization factor
* #return the PSNR
*/
String calculate_PSNR(double x)
{
if (x >= 0 && x <= 0.934)
{
return String.format("%.2f", new Float(23.65 * Math.exp(0.6 * x) - 20.0 * Math.exp(-7.508 * x)));
}
else if (x > 0.934 && x < 1.07)
{
return new String("> 40");
}
else if (x >= 1.07 && x < 1.9)
{
return String.format("%.2f", new Float(-11.566 * x + 52.776));
}
else
{
return String.format("%.2f",new Float(13.06*x*x*x*x - 121.4 * x*x*x + 408.5 * x*x -595.5*x + 349));
}
}
private Img<UnsignedByteType> performNaturalization(Img<UnsignedByteType> channel, float T2_prior, float[] result) {
// Parameters balance between first order and second order
final FloatType Theta = new FloatType(0.5f);
try {
channel = doNaturalization(channel, Theta, UnsignedByteType.class, T2_prior, result);
} catch (final InstantiationException e) {
e.printStackTrace();
} catch (final IllegalAccessException e) {
e.printStackTrace();
}
return channel;
}
// Original data
// N = nuber of bins
// offset of the histogram
// T current
private double FindT_Evalue(float[] p_d, int N, int offset, float T)
{
double error = 0;
for (int i=-offset; i<N-offset; ++i) {
final double tmp = Math.atan(T*(i)) - p_d[i+offset];
error += (tmp*tmp);
}
return error;
}
// Find the T
// data CDF Histogram
// N number of bins
// Offset of the histogram
// eps precision
private double FindT(IterableInterval<FloatType> data, int N, int OffSet, float eps)
{
//find the best parameter between data and model atan(Tx)/pi+0.5
// Search between 0 and 1.0
float left = 0;
float right = 1.0f;
float m1 = 0.0f;
float m2 = 0.0f;
// Crate p_t to save computation (shift and rescale the original CDF)
final float p_t[] = new float[N];
// Copy the data
final Cursor<FloatType> cur_data = data.cursor();
for (int i = 0; i < N; ++i)
{
cur_data.next();
p_t[i] = (float) ((cur_data.get().getRealFloat() - 0.5)*Math.PI);
}
// While the precision is bigger than eps
while (right-left>=eps)
{
// move left and right of 1/3 (m1 and m2)
m1=left+(right-left)/3;
m2=right-(right-left)/3;
// Evaluate on m1 and m2, ane move the extreme point
if (FindT_Evalue(p_t, N, OffSet, m1) <=FindT_Evalue(p_t, N, OffSet, m2)) {
right=m2;
}
else {
left=m1;
}
}
// return the average
return (m1+m2)/2;
}
private Img<FloatType> create2DGradientField() {
final long dims[] = new long[2];
dims[0] = N_Grad;
dims[1] = N_Grad;
final Img<FloatType> GradD = new ArrayImgFactory<FloatType>().create(dims, new FloatType());
return GradD;
}
private void calculateLapCDF(Img<FloatType> LapCDF) {
final RandomAccess<FloatType> Lap_hist2 = LapCDF.randomAccess();
//convert Lap to CDF
for (int i = 1; i < N_Lap; ++i)
{
Lap_hist2.setPosition(i-1,0);
final float prec = Lap_hist2.get().getRealFloat();
Lap_hist2.move(1,0);
Lap_hist2.get().set(Lap_hist2.get().getRealFloat() + prec);
}
}
private void calculateGradCDF(Img<FloatType> GradCDF, Img<FloatType> GradD) {
final RandomAccess<FloatType> Grad_dist = GradD.randomAccess();
// Gradient on x pointer
final IntervalView<FloatType> Gradx = Views.hyperSlice(GradCDF, GradCDF.numDimensions()-1 , 0);
// Gradient on y pointer
final IntervalView<FloatType> Grady = Views.hyperSlice(GradCDF, GradCDF.numDimensions()-1 , 1);
integrateOverRowAndCol(Grad_dist, Gradx, Grady);
scaleGradiens(Gradx, Grady);
}
private void scaleGradiens(IntervalView<FloatType> Gradx, IntervalView<FloatType> Grady) {
final RandomAccess<FloatType> Gradx_r2 = Gradx.randomAccess();
final RandomAccess<FloatType> Grady_r2 = Grady.randomAccess();
//scale, divide the number of integrated bins
for (int i = 0; i < N_Grad; ++i)
{
Gradx_r2.setPosition(i,0);
Grady_r2.setPosition(i,0);
Gradx_r2.get().set((float) (Gradx_r2.get().getRealFloat() / 255.0));
Grady_r2.get().set((float) (Grady_r2.get().getRealFloat() / 255.0));
}
}
private void integrateOverRowAndCol(RandomAccess<FloatType> Grad_dist, IntervalView<FloatType> Gradx, IntervalView<FloatType> Grady) {
final int[] loc = new int[2];
// pGrad2D has 2D CDF
final RandomAccess<FloatType> Gradx_r = Gradx.randomAccess();
// Integrate over the row
for (int i = 0; i < N_Grad; ++i)
{
loc[1] = i;
Gradx_r.setPosition(i,0);
// get the row
for (int j = 0; j < N_Grad; ++j)
{
loc[0] = j;
// Set the position
Grad_dist.setPosition(loc);
// integrate over the row to get 1D vector
Gradx_r.get().set(Gradx_r.get().getRealFloat() + Grad_dist.get().getRealFloat());
}
}
final RandomAccess<FloatType> Grady_r = Grady.randomAccess();
// Integrate over the column
for (int i = 0; i < N_Grad; ++i)
{
loc[1] = i;
Grady_r.setPosition(0,0);
for (int j = 0; j < N_Grad; ++j)
{
loc[0] = j;
Grad_dist.setPosition(loc);
Grady_r.get().set(Grady_r.get().getRealFloat() + Grad_dist.get().getRealFloat());
Grady_r.move(1,0);
}
}
}
private <T extends RealType<T>> void calculateLaplaceFieldAndGradient(Img<T> image, Img<FloatType> LapCDF, Img<FloatType> GradD) {
final RandomAccess<FloatType> Grad_dist = GradD.randomAccess();
final long[] origImgDimensions = new long[2];
image.dimensions(origImgDimensions);
final Img<FloatType> laplaceField = new ArrayImgFactory<FloatType>().create(origImgDimensions, new FloatType());
// Cursor localization
final int[] indexD = new int[2];
final int[] loc_p = new int[2];
final RandomAccess<T> img_cur = image.randomAccess();
final RandomAccess<FloatType> Lap_f = laplaceField.randomAccess();
final RandomAccess<FloatType> Lap_hist = LapCDF.randomAccess();
// Normalization 1/(Number of pixel of the original image)
long n_pixel = 1;
for (int i = 0 ; i < laplaceField.numDimensions() ; i++)
{n_pixel *= laplaceField.dimension(i)-2;}
// unit to sum
final double f = 1.0/(n_pixel);
// Inside the image for Y
final Cursor<FloatType> cur = laplaceField.cursor();
// For each point of the Laplacian field
while (cur.hasNext())
{
cur.next();
// Localize cursors
cur.localize(loc_p);
// Exclude the border
boolean border = false;
for (int i = 0 ; i < image.numDimensions() ; i++)
{
if (loc_p[i] == 0)
{border = true;}
else if (loc_p[i] == image.dimension(i)-1)
{border = true;}
}
if (border == true) {
continue;
}
// get the stencil value;
img_cur.setPosition(loc_p);
float L = -4*img_cur.get().getRealFloat();
// Laplacian
for (int i = 0 ; i < 2 ; i++)
{
img_cur.move(1, i);
final float G_p = img_cur.get().getRealFloat();
img_cur.move(-1,i);
final float G_m = img_cur.get().getRealFloat();
img_cur.move(-1, i);
final float L_m = img_cur.get().getRealFloat();
img_cur.setPosition(loc_p);
L += G_p + L_m;
// Calculate the gradient + convert into bin
indexD[1-i] = (int) (Grad_Offset + G_p - G_m);
}
Lap_f.setPosition(loc_p);
// Set the Laplacian field
Lap_f.get().setReal(L);
// Histogram bin conversion
L += Lap_Offset;
Lap_hist.setPosition((int)(L),0);
Lap_hist.get().setReal(Lap_hist.get().getRealFloat() + f);
Grad_dist.setPosition(indexD);
Grad_dist.get().setReal(Grad_dist.get().getRealFloat() + f);
}
}
private void convertGrad2dToCDF(Img<FloatType> GradD) {
final RandomAccess<FloatType> Grad_dist = GradD.randomAccess();
final int[] loc = new int[GradD.numDimensions()];
// for each row
for (int j = 0; j < GradD.dimension(1); ++j)
{
loc[1] = j;
for (int i = 1; i < GradD.dimension(0) ; ++i)
{
loc[0] = i-1;
Grad_dist.setPosition(loc);
// Precedent float
final float prec = Grad_dist.get().getRealFloat();
// Move to the actual position
Grad_dist.move(1, 0);
// integration up to the current position
Grad_dist.get().set(Grad_dist.get().getRealFloat() + prec);
}
}
//col integration
for (int j = 1; j < GradD.dimension(1); ++j)
{
// Move to the actual position
loc[1] = j-1;
for (int i = 0; i < GradD.dimension(0); ++i)
{
loc[0] = i;
Grad_dist.setPosition(loc);
// Precedent float
final float prec = Grad_dist.get().getRealFloat();
// Move to the actual position
Grad_dist.move(1, 1);
Grad_dist.get().set(Grad_dist.get().getRealFloat() + prec);
}
}
}
/**
* Show information about authors and paper.
*/
private void showMessage()
{
// Create main window with panel to store gui components
final JDialog win = new JDialog((JDialog)null, "Naturalization", true);
final JPanel msg = new JPanel();
msg.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
// Create message not editable but still focusable for copying
final JTextPane text = new JTextPane();
text.setContentType("text/html");
text.setText("<html>Y. Gong and I. F. Sbalzarini. Image enhancement by gradient distribution specification. In Proc. ACCV, <br>"
+ "12th Asian Conference on Computer Vision, Workshop on Emerging Topics in Image Enhancement and Restoration,<br>"
+ "pages w7–p3, Singapore, November 2014.<br><br>"
+ "Y. Gong and I. F. Sbalzarini, Gradient Distributions Priors for Biomedical Image Processing, 2014<br>http://arxiv.org/abs/1408.3300<br><br>"
+ "Y. Gong and I. F. Sbalzarini. A Natural-Scene Gradient Distribution Prior and its Application in Light-Microscopy Image Processing.<br>"
+ "IEEE Journal of Selected Topics in Signal Processing, Vol.10, No.1, February 2016, pages 99-114<br>"
+ "ISSN: 1932-4553, DOI: 10.1109/JSTSP.2015.2506122<br><br>"
+ "</html>");
text.setBorder(BorderFactory.createLineBorder(Color.BLACK, 2));
text.setEditable(false);
msg.add(text);
// Add button "Close" for closing window easily
final JButton button = new JButton("Close");
button.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
win.dispose();
}
});
msg.add(button);
// Finally show window with message
win.add(msg);
win.pack();
win.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
win.setVisible(true);
}
#Override
protected boolean showDialog() {
return true;
}
#Override
protected boolean setup(String aArgs) {
setFilePrefix("naturalized_");
return true;
}
}
I want it to compile it again and get a .class file or a whole .jar file of this plugin.
Which sturcuture and datas I need for get a .class data?
What are with the import files, where i can get the ij, java, javax and net files? In which structure must it be.
I am a novice in Java and only know, that the compiled command is javac.
on linux there is a command to do it which is javac
just : javac HelloWorld.java
it might be the same thing on windows but i am not sure (install a virtual linux box if there is no other way)
If something goes wrong google the error
If you want to compile a Java program from command line you should use the javac command and to invoke it just write java and then the name of your program.
Compiling a file you will have the .class file that you are looking for.
I want to print 2 titles with different font, and then print a table's header and all rows with another font. I have the table content in a JTable. When the user clicks a button, I want to send all the things to the PrinterServices and print them with LANDSCAPE orientation. There may be many rows so I need to do the pagination. The pagination is in the left bottom.
I see there's no possibility to use JTable.print because I need the title in font1, the subtitle in font2, and the table header/table data in font3.
How can I do that?
I have seen this page, shows me how to print with different style in several pages:
http://www.java2s.com/Code/Java/2D-Graphics-GUI/PrintinJavapageformatanddocument.htm
But I think this link place the different styles in different pages, and in my situation, the title1 and title2 are in the first page, and the rest of the page is filled with row data, and then page 2, page 3... So it contains several styles in the same page and is not exactly what the link does.
EDIT:
Now I have these code, but they are not working in two aspects:
I must set the orientation in the print dialog prompt (choose the "Horizontal" orientation). I want it by default, but I don't want the Java native page setup dialog. I want the system dependant one.
The left margin/indent increases as the page number increases. I want it static. I must have messed up the coordinates.
The pagination foot is not there. How can I get it?
So I have:
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.print.PageFormat;
import java.awt.print.Paper;
import java.awt.print.Printable;
import java.awt.print.PrinterException;
import java.awt.print.PrinterJob;
import javax.print.attribute.HashPrintRequestAttributeSet;
import javax.print.attribute.PrintRequestAttributeSet;
public class PrintingTest1 {
/**
* #param args
*/
public static void main(String[] args) {
PrinterJob job = PrinterJob.getPrinterJob();
//cross-platform print dialog, java l&f
// PrintRequestAttributeSet aset = new HashPrintRequestAttributeSet();
//java page setup dialog
// PageFormat pf = job.getPageFormat(aset);
// job.setPrintable(new PrintingTest1().new HelloWorldPrinter(), pf);
//java print setup dialog
// boolean doPrint = job.printDialog(aset);
// if (doPrint) {
// try {
// job.print(aset);
// } catch (PrinterException e) {
// System.out.println("Cancelled. ");
// }
// }
//native print dialog
PrintRequestAttributeSet aset = new HashPrintRequestAttributeSet();
Font font1 = new Font("Courier New", Font.PLAIN, 12);
Font font2 = new Font("Courier New", Font.PLAIN, 10);
Font font3 = new Font("Courier New", Font.PLAIN, 9);
HelloWorldPrinter printer = new PrintingTest1().new HelloWorldPrinter();
printer.setFont1(font1);
printer.setFont2(font2);
printer.setFont3(font3);
printer.setTitle1("Title 1: Main title");
printer.setTitle2line1("Title 2 line 1: top");
printer.setTitle2line2("Title 2 line 2: bot");
printer.setHeaderline1("HeaderLine1: top");
printer.setHeaderline2("HeaderLine2: bot");
String[][] rows = new String[85][2];
for (int i=0; i<rows.length; i++) {
rows[i] = new String[] {"row " + i + ", line 1", " row " + i + ", line 2"};
}
printer.setRows(rows.length);
printer.setRowsData(rows);
job.setPrintable(printer);
boolean doPrint = job.printDialog();
if (doPrint) {
try {
job.print();
} catch (PrinterException e) {
System.out.println("Cancelled. ");
}
}
}
class HelloWorldPrinter implements Printable {
private Font font1;
private Font font2;
private Font font3;
private int lineHeight1;
private int lineHeight2;
private int lineHeight3;
private String title1;
private String title2line1;
private String title2line2;
private String headerline1;
private String headerline2;
private String[][] rowsData;
/**
* Number of rows in the table
*/
private int rows;
/**
* Number of lines of data to print. 2*rows.
*/
private int dataLines;
private int pageLimit;
private int linesDataOnPage0;
private int linesOnPage0;
private int linesPerPage;
/**
* The array index of row data when every new pages starts to print.
*/
private int newStartIndex;
public void setRows(int rows) {
this.rows = rows;
}
public void setFont1(Font font1) {
this.font1 = font1;
}
public void setFont2(Font font2) {
this.font2 = font2;
}
public void setFont3(Font font3) {
this.font3 = font3;
}
public void setTitle1(String title1) {
this.title1 = title1;
}
public void setTitle2line1(String title2line1) {
this.title2line1 = title2line1;
}
public void setTitle2line2(String title2line2) {
this.title2line2 = title2line2;
}
public void setHeaderline1(String headerline1) {
this.headerline1 = headerline1;
}
public void setHeaderline2(String headerline2) {
this.headerline2 = headerline2;
}
public void setRowsData(String[][] rowsData) {
this.rowsData = rowsData;
}
public HelloWorldPrinter() {
// TODO Auto-generated constructor stub
}
private int calculatePageLimit(int dataLines, Graphics g, PageFormat pf) {
FontMetrics metrics1 = g.getFontMetrics(font1);
FontMetrics metrics2 = g.getFontMetrics(font2);
FontMetrics metrics3 = g.getFontMetrics(font3);
lineHeight1 = metrics1.getHeight();
lineHeight2 = metrics2.getHeight();
lineHeight3 = metrics3.getHeight();
double pageHeight = pf.getImageableHeight();
//title 1, title 2 (2 lines), header (2 lines)
linesDataOnPage0 = (int)((pageHeight - lineHeight1 - lineHeight2*2 - lineHeight3*2) / lineHeight3);
linesOnPage0 = linesDataOnPage0 + 5;
linesPerPage = (int)pageHeight / lineHeight3;
int pageLimit0 = 0;
if (dataLines <= linesDataOnPage0) {
pageLimit0 = 1; //all data can be printed on the first page.
} else {
int lastPageLines = (dataLines - linesDataOnPage0) % linesPerPage;
pageLimit0 = (dataLines - linesDataOnPage0 - lastPageLines) / linesPerPage + 2;
}
return pageLimit0;
}
#Override
public int print(Graphics graphics, PageFormat pageFormat, int pageIndex) throws PrinterException {
if (pageLimit == 0) { //not calculated yet.
this.dataLines = rows * 2;
pageLimit = calculatePageLimit(dataLines, graphics, pageFormat);
}
Paper papel = new Paper();
papel.setImageableArea(72, 72, 697, 450);
papel.setSize(841, 595);
pageFormat.setPaper(papel);
pageFormat.setOrientation(PageFormat.LANDSCAPE);
Graphics2D g2d = (Graphics2D)graphics;
g2d.translate(pageFormat.getImageableX(), pageFormat.getImageableY());
if (pageIndex < pageLimit) {
int y = 10;
if (pageIndex == 0) {
// 1. print the title 1
g2d.setFont(font1);
g2d.drawString(title1, 10, y);
y += lineHeight1;
// 2. print title 2
g2d.setFont(font2);
g2d.drawString(title2line1, 10, y);
y += lineHeight2;
g2d.drawString(title2line2, 10, y);
y += lineHeight2;
// 3. print header
g2d.setFont(font3);
g2d.drawString(headerline1, 10, y);
y += lineHeight3;
g2d.drawString(headerline2, 10, y);
y += lineHeight3;
// 4. print data
for (int i=0; i< (int)(linesDataOnPage0 / 2); i++) {
g2d.drawString(rowsData[i][0], 10, y);
y += lineHeight3;
g2d.drawString(rowsData[i][1], 10, y);
y += lineHeight3;
}
y = 0;
newStartIndex = (int)(linesDataOnPage0 / 2);
return PAGE_EXISTS;
} else {
int end;
if (newStartIndex + (int)(linesPerPage / 2) > rowsData.length) {
end = rowsData.length;
} else {
end = newStartIndex + (int)(linesPerPage / 2);
}
g2d.setFont(font3);
for (int i=newStartIndex; i< end; i++) {
g2d.drawString(rowsData[i][0], 10, y);
y += lineHeight3;
g2d.drawString(rowsData[i][1], 10, y);
y += lineHeight3;
}
y = 0;
newStartIndex +=(int)(linesPerPage / 2);
return PAGE_EXISTS;
}
} else {
return NO_SUCH_PAGE;
}
}
}
}
I've been wanting to design a generator for dragon curves.
(If you want info on that check this out, but it doesn't really matter for the issue)
A dragon curve is a repeating mathematical construct.
I've already written a generator for what the canvas should draw, it works by returning a char array consisting of 'r' or 'l', saying whether the line has to turn left or right next. In the code here, it's the method input(). This part works perfectly.
The problem is that whenever I want to draw it on the canvas (using drawLine), it only draws the first two lines as actual lines, the rest are just dots.
The dots are on the right positions and if you make the thing really big, you can't tell the difference anymore, but nevertheless, there are supposed to be lines there.
Image:
This is the code I used:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
/**
*
* Description
*
* #version 1.0 from 4/20/2016
* #author
*/
public class CurveGen extends JFrame {
// start attributes
private Canvas display = new Canvas();
private JButton startButton = new JButton();
private JLabel jLabel1 = new JLabel();
private JTextArea outText = new JTextArea("");
private JScrollPane outTextScrollPane = new JScrollPane(outText);
private JLabel jLabel2 = new JLabel();
private JSlider xSlider = new JSlider();
private JSlider ySlider = new JSlider();
private JNumberField iterationsNF = new JNumberField();
private JNumberField sizeNF = new JNumberField();
// end attributes
public CurveGen(String title) {
// Frame-Init
super(title);
setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
int frameWidth = 1022;
int frameHeight = 731;
setSize(frameWidth, frameHeight);
Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
int x = (d.width - getSize().width) / 2;
int y = (d.height - getSize().height) / 2;
setLocation(x, y);
setResizable(false);
Container cp = getContentPane();
cp.setLayout(null);
// start components
display.setBounds(16, 64, 601, 601);
cp.add(display);
startButton.setBounds(736, 464, 241, 129);
startButton.setText("START!");
startButton.setMargin(new Insets(2, 2, 2, 2));
startButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
startButton_ActionPerformed(evt);
}
});
startButton.setFont(new Font("Dialog", Font.BOLD, 36));
cp.add(startButton);
jLabel1.setBounds(760, 96, 75, 41);
jLabel1.setText("Iterations:");
cp.add(jLabel1);
outTextScrollPane.setBounds(728, 392, 257, 57);
cp.add(outTextScrollPane);
jLabel2.setBounds(768, 144, 67, 41);
jLabel2.setText("Size:");
cp.add(jLabel2);
xSlider.setBounds(0, 8, 633, 49);
xSlider.setMinorTickSpacing(25);
xSlider.setMajorTickSpacing(100);
xSlider.setPaintTicks(true);
xSlider.setPaintLabels(true);
xSlider.setToolTipText("Starting point y-coordinate");
xSlider.setMaximum(600);
xSlider.setValue(300);
cp.add(xSlider);
ySlider.setBounds(624, 56, 65, 625);
ySlider.setMinorTickSpacing(25);
ySlider.setMajorTickSpacing(100);
ySlider.setPaintTicks(true);
ySlider.setPaintLabels(true);
ySlider.setOrientation(SwingConstants.VERTICAL);
ySlider.setMaximum(600);
ySlider.setInverted(true);
ySlider.setValue(300);
ySlider.setToolTipText("Starting point x-coordinate");
cp.add(ySlider);
iterationsNF.setBounds(856, 96, 81, 41);
iterationsNF.setText("");
cp.add(iterationsNF);
sizeNF.setBounds(856, 144, 81, 41);
sizeNF.setText("");
cp.add(sizeNF);
// end components
setVisible(true);
} // end of public CurveGen
// start methods
public static void main(String[] args) {
new CurveGen("CurveGen");
} // end of main
public char[] input(int iter) {
char oldOut[] = new char[0];
for (int i=1;i<=iter;i++) {
char newOut[] = new char[((int)Math.pow(2, i))-1];
for (int n=0;n<oldOut.length;n++) {
newOut[n] = oldOut[n];
if (oldOut[n]=='r') {
newOut[newOut.length-n-1] = 'l';
}
if (oldOut[n]=='l') {
newOut[newOut.length-n-1] = 'r';
} // end of if
} // end of for
newOut[oldOut.length]='l';
oldOut = newOut;
} // end of for
return oldOut;
}
public void startButton_ActionPerformed(ActionEvent evt) {
int iterations = iterationsNF.getInt();
int size = sizeNF.getInt();
char com[] = input(iterations);
outText.setText(String.valueOf(com));
int dir = 0;
int newDir = 0;
int lastPos[] = {xSlider.getValue(),ySlider.getValue()-size};
int newPos[] = {0,0};
Graphics g = display.getGraphics();
g.clearRect(0,0,601,601);
g.drawLine(xSlider.getValue(),ySlider.getValue(),xSlider.getValue(),ySlider.getValue()-size);
for (int i=0;i<=com.length-1;i++) {
dir = newDir;
if (dir==0) {
if (com[i]=='l') {
newPos[0] = lastPos[0]-size;
newPos[1] = lastPos[1];
newDir = 3;
}
if (com[i]=='r') {
newPos[0] = lastPos[0]+size;
newPos[1] = lastPos[1];
newDir = 1;
}
}
if (dir==1) {
if (com[i]=='l') {
newPos[0] = lastPos[0];
newPos[1] = lastPos[1]-size;
newDir = 0;
}
if (com[i]=='r') {
newPos[0] = lastPos[0];
newPos[1] = lastPos[1]+size;
newDir = 2;
}
}
if (dir==2) {
if (com[i]=='l') {
newPos[0] = lastPos[0]+size;
newPos[1] = lastPos[1];
newDir = 1;
}
if (com[i]=='r') {
newPos[0] = lastPos[0]-size;
newPos[1] = lastPos[1];
newDir = 3;
}
}
if (dir==3) {
if (com[i]=='l') {
newPos[0] = lastPos[0];
newPos[1] = lastPos[1]+size;
newDir = 2;
}
if (com[i]=='r') {
newPos[0] = lastPos[0];
newPos[1] = lastPos[1]-size;
newDir = 0;
}
}
g.drawLine(lastPos[0],lastPos[1],newPos[0],newPos[1]);
lastPos=newPos;
} // end of for
} // end of startButton_ActionPerformed
// end methods
} // end of class CurveGen
Okay, so I've gone back over the code...
Mixing heavyweight (java.awt.Canvas) and lightweight (Swing) components is unadvisable as they can cause or sorts of painting issues
getGraphics is not how paint should be done. Instead, I'd start with a custom JPanel and override its paintComponent. See Painting in AWT and Swing and Performing Custom Painting for more details
Avoid using null layouts, pixel perfect layouts are an illusion within modern ui design. There are too many factors which affect the individual size of components, none of which you can control. Swing was designed to work with layout managers at the core, discarding these will lead to no end of issues and problems that you will spend more and more time trying to rectify
I believe the problem is associated with this...
lastPos=newPos;
All you are doing is making lastPos point to the same place in memory as newPos, so when you assign values to newPos, lastPos will have the same values, hence the reason you're seeing dots.
What I would do first, is separate the responsible for the generation of the data from the display.
I'd start with some kind of model (note, you could create a model which took iterations instead and which generated the data itself, but I was focusing on solving the initial problem)
public class DragonModel {
private Point startPoint;
private int size;
private char[] values;
public DragonModel(Point startPoint, int size, char[] values) {
this.startPoint = startPoint;
this.size = size;
this.values = values;
}
public Point getStartPoint() {
return startPoint;
}
public int getSize() {
return size;
}
public char[] getValues() {
return values;
}
}
and then the display...
public class DragonPane extends JPanel {
private DragonModel model;
public void setModel(DragonModel model) {
this.model = model;
repaint();
}
#Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
if (model != null) {
Graphics2D g2d = (Graphics2D) g.create();
int size = model.getSize();
int dir = 0;
int newDir = 0;
Point lastPos = model.getStartPoint();
Point newPos = new Point(0, 0);
for (char value : model.values) {
if (dir == 0) {
if (value == 'l') {
newPos.x = lastPos.x - size;
newPos.y = lastPos.y;
newDir = 3;
}
if (value == 'r') {
newPos.x = lastPos.x + size;
newPos.y = lastPos.y;
newDir = 1;
}
}
if (dir == 1) {
if (value == 'l') {
newPos.x = lastPos.x;
newPos.y = lastPos.y - size;
newDir = 0;
}
if (value == 'r') {
newPos.x = lastPos.x;
newPos.y = lastPos.y + size;
newDir = 2;
}
}
if (dir == 2) {
if (value == 'l') {
newPos.x = lastPos.x + size;
newPos.y = lastPos.y;
newDir = 1;
}
if (value == 'r') {
newPos.x = lastPos.x - size;
newPos.y = lastPos.y;
newDir = 3;
}
}
if (dir == 3) {
if (value == 'l') {
newPos.x = lastPos.x;
newPos.y = lastPos.y + size;
newDir = 2;
}
if (value == 'r') {
newPos.x = lastPos.x;
newPos.y = lastPos.y - size;
newDir = 0;
}
}
g.drawLine(lastPos.x, lastPos.y, newPos.x, newPos.y);
dir = newDir;
lastPos = new Point(newPos);
}
}
}
}
The idea here is to try and decouple of the responsibility a little, the responsibility for the generation and displaying of the data sit firmly in two different areas.
Then in your actionPerformed method you could simply do...
public void startButton_ActionPerformed(ActionEvent evt) {
int iterations = Integer.parseInt(iterationsNF.getText());
int size = Integer.parseInt(sizeNF.getText());
char com[] = input(iterations);
outText.setText(String.valueOf(com));
DragonModel model = new DragonModel(new Point(xSlider.getValue(), ySlider.getValue()), size, com);
display.setModel(model);
} // end of startButton_ActionPerformed
which could result in something like...
The drawing code should be inside the paint(Graphics) method to synchronize with the rendering loop properly. In an event handler, update the data model of the component (calculate the lines and keep them in a data structure inside the component), then call the method repaint() to trigger the event rendering loop, which will call your paint method.
There are some other variations of this, but the general idea is that you change the data and then request rendering. The rendering engine may call your paint method in other cases as well, not only when you change the data, so ideally paint() has all the data it needs to render fast, meaning it should not do calculations or heavy operations other than rendering on the Graphics object.
This means that you have to subclass JComponent in a new class, and implement paint inside it. This class should have an internal data structure with the lines ready to render at any point in time. Then use your new class in the JFrame.
I've trained a neural network in NetBeans and saved it as neural_network.ser by using Serializable ,"all classes implement Serializable" , Now I want to use it in my android application but when loading the network ,ClassNotFoundException raised .
java.lang.ClassNotFoundException: neural_network.BackPropagation
Here is the Classes:
BackPropagation class:
public class BackPropagation extends Thread implements Serializable
{
private static final String TAG = "NetworkMessage";
private static final long serialVersionUID = -8862858027413741101L;
private double OverallError;
// The minimum Error Function defined by the user
private double MinimumError;
// The user-defined expected output pattern for a set of samples
private double ExpectedOutput[][];
// The user-defined input pattern for a set of samples
private double Input[][];
// User defined learning rate - used for updating the network weights
private double LearningRate;
// Users defined momentum - used for updating the network weights
private double Momentum;
// Number of layers in the network
private int NumberOfLayers;
// Number of training sets
private int NumberOfSamples;
// Current training set/sample that is used to train network
private int SampleNumber;
// Maximum number of Epochs before the traing stops training
private long MaximumNumberOfIterations;
// Public Variables
public LAYER Layer[];
public double ActualOutput[][];
long delay = 0;
boolean die = false;
// Calculate the node activations
public void FeedForward()
{
int i,j;
// Since no weights contribute to the output
// vector from the input layer,
// assign the input vector from the input layer
// to all the node in the first hidden layer
for (i = 0; i < Layer[0].Node.length; i++)
Layer[0].Node[i].Output = Layer[0].Input[i];
Layer[1].Input = Layer[0].Input;
for (i = 1; i < NumberOfLayers; i++)
{
Layer[i].FeedForward();
// Unless we have reached the last layer, assign the layer i's //output vector
// to the (i+1) layer's input vector
if (i != NumberOfLayers-1)
Layer[i+1].Input = Layer[i].OutputVector();
}
}
// FeedForward()
// Back propagated the network outputy error through
// the network to update the weight values
public void UpdateWeights()
{
CalculateSignalErrors();
BackPropagateError();
}
private void CalculateSignalErrors()
{
int i,j,k,OutputLayer;
double Sum;
OutputLayer = NumberOfLayers-1;
// Calculate all output signal error
for (i = 0; i < Layer[OutputLayer].Node.length; i++)
{
Layer[OutputLayer].Node[i].SignalError =
(ExpectedOutput[SampleNumber][i] -Layer[OutputLayer].Node[i].Output) *
Layer[OutputLayer].Node[i].Output *
(1-Layer[OutputLayer].Node[i].Output);
}
// Calculate signal error for all nodes in the hidden layer
// (back propagate the errors
for (i = NumberOfLayers-2; i > 0; i--)
{
for (j = 0; j < Layer[i].Node.length; j++)
{
Sum = 0;
for (k = 0; k < Layer[i+1].Node.length; k++)
Sum = Sum + Layer[i+1].Node[k].Weight[j] *
Layer[i+1].Node[k].SignalError;
Layer[i].Node[j].SignalError = Layer[i].Node[j].Output*(1 -
Layer[i].Node[j].Output)*Sum;
}
}
}
private void BackPropagateError()
{
int i,j,k;
// Update Weights
for (i = NumberOfLayers-1; i > 0; i--)
{
for (j = 0; j < Layer[i].Node.length; j++)
{
// Calculate Bias weight difference to node j
Layer[i].Node[j].ThresholdDiff = LearningRate *
Layer[i].Node[j].SignalError +
Momentum*Layer[i].Node[j].ThresholdDiff;
// Update Bias weight to node j
Layer[i].Node[j].Threshold =
Layer[i].Node[j].Threshold +
Layer[i].Node[j].ThresholdDiff;
// Update Weights
for (k = 0; k < Layer[i].Input.length; k++)
{
// Calculate weight difference between node j and k
Layer[i].Node[j].WeightDiff[k] =
LearningRate *
Layer[i].Node[j].SignalError*Layer[i-
1].Node[k].Output +
Momentum*Layer[i].Node[j].WeightDiff[k];
// Update weight between node j and k
Layer[i].Node[j].Weight[k] =
Layer[i].Node[j].Weight[k] +
Layer[i].Node[j].WeightDiff[k];
}
}
}
}
private void CalculateOverallError()
{
int i,j;
OverallError = 0;
for (i = 0; i < NumberOfSamples; i++)
for (j = 0; j < Layer[NumberOfLayers-1].Node.length; j++)
{
OverallError = OverallError +
0.5*( Math.pow(ExpectedOutput[i][j] - ActualOutput[i]
[j],2) );
}
}
public BackPropagation(int NumberOfNodes[],
double InputSamples[][],
double OutputSamples[][],
double LearnRate,
double Moment,
double MinError,
long MaxIter
)
{
int i,j;
// Initiate variables
NumberOfSamples = InputSamples.length;
MinimumError = MinError;
LearningRate = LearnRate;
Momentum = Moment;
NumberOfLayers = NumberOfNodes.length;
MaximumNumberOfIterations = MaxIter;
// Create network layers
Layer = new LAYER[NumberOfLayers];
// Assign the number of node to the input layer
Layer[0] = new LAYER(NumberOfNodes[0],NumberOfNodes[0]);
// Assign number of nodes to each layer
for (i = 1; i < NumberOfLayers; i++)
Layer[i] = new LAYER(NumberOfNodes[i],NumberOfNodes[i-1]);
Input = new double[NumberOfSamples][Layer[0].Node.length];
ExpectedOutput = new double[NumberOfSamples][Layer[NumberOfLayers-
1].Node.length];
ActualOutput = new double[NumberOfSamples][Layer[NumberOfLayers-
1].Node.length];
// Assign input set
for (i = 0; i < NumberOfSamples; i++)
for (j = 0; j < Layer[0].Node.length; j++)
Input[i][j] = InputSamples[i][j];
// Assign output set
for (i = 0; i < NumberOfSamples; i++)
for (j = 0; j < Layer[NumberOfLayers-1].Node.length; j++)
ExpectedOutput[i][j] = OutputSamples[i][j];
}
public void TrainNetwork()
{
int i,j;
long k=0;
do
{
// For each pattern
for (SampleNumber = 0; SampleNumber < NumberOfSamples; SampleNumber++)
{
for (i = 0; i < Layer[0].Node.length; i++)
Layer[0].Input[i] = Input[SampleNumber][i];
FeedForward();
// Assign calculated output vector from network to ActualOutput
for (i = 0; i < Layer[NumberOfLayers-1].Node.length; i++)
ActualOutput[SampleNumber][i] = Layer[NumberOfLayers-
1].Node[i].Output;
UpdateWeights();
// if we've been told to stop training, then
// stop thread execution
if (die){
return;
}
// if
}
k++;
// Calculate Error Function
CalculateOverallError();
System.out.println("OverallError =
"+Double.toString(OverallError)+"\n");
System.out.print("Epoch = "+Long.toString(k)+"\n");
} while ((OverallError > MinimumError) &&(k < MaximumNumberOfIterations));
}
public LAYER[] get_layers() { return Layer; }
// called when testing the network.
public double[] test(double[] input)
{
int winner = 0;
NODE[] output_nodes;
for (int j = 0; j < Layer[0].Node.length; j++)
{ Layer[0].Input[j] = input[j];}
FeedForward();
// get the last layer of nodes (the outputs)
output_nodes = (Layer[Layer.length - 1]).get_nodes();
double[] actual_output = new double[output_nodes.length];
for (int k=0; k < output_nodes.length; k++)
{
actual_output[k]=output_nodes[k].Output;
} // for
return actual_output;
}//test()
public double get_error()
{
CalculateOverallError();
return OverallError;
} // get_error()
// to change the delay in the network
public void set_delay(long time)
{
if (time >= 0) {
delay = time;
} // if
}
//save the trained network
public void save(String FileName)
{
try{
FileOutputStream fos = new FileOutputStream (new File(FileName), true);
// Serialize data object to a file
ObjectOutputStream os = new ObjectOutputStream(fos);
os.writeObject(this);
os.close();
fos.close();
System.out.println("Network Saved!!!!");
}
catch (IOException E){System.out.println(E.toString());}
catch (Exception e){System.out.println(e.toString());}
}
public BackPropagation load(String FileName)
{
BackPropagation myclass= null;
try
{
//File patternDirectory = new File(Environment.getExternalStorageDirectory().getAbsolutePath().toString()+"INDIAN_NUMBER_RECOGNITION.data");
//patternDirectory.mkdirs();
FileInputStream fis = new FileInputStream(new File(FileName));
//FileInputStream fis =context.openFileInput(FileName);
ObjectInputStream is = new ObjectInputStream(fis);
myclass = (BackPropagation) is.readObject();
System.out.println("Error After Reading = "+Double.toString(myclass.get_error())+"\n");
is.close();
fis.close();
return myclass;
}
catch (Exception e){System.out.println(e.toString());}
return myclass;
}
// needed to implement threading.
public void run() {
TrainNetwork();
File Net_File = new File(Environment.getExternalStorageDirectory(),"Number_Recognition_1.ser");
save(Net_File.getAbsolutePath());
System.out.println( "DONE TRAINING :) ^_^ ^_^ :) !\n");
System.out.println("With Network ERROR = "+Double.toString(get_error())+"\n");
} // run()
// to notify the network to stop training.
public void kill() { die = true; }
}
Layer Class:
public class LAYER implements Serializable
{
private double Net;
public double Input[];
// Vector of inputs signals from previous
// layer to the current layer
public NODE Node[];
// Vector of nodes in current layer
// The FeedForward function is called so that
// the outputs for all the nodes in the current
// layer are calculated
public void FeedForward() {
for (int i = 0; i < Node.length; i++) {
Net = Node[i].Threshold;
for (int j = 0; j < Node[i].Weight.length; j++)
{Net = Net + Input[j] * Node[i].Weight[j];
System.out.println("Net = "+Double.toString(Net)+"\n");
}
Node[i].Output = Sigmoid(Net);
System.out.println("Node["+Integer.toString(i)+".Output = "+Double.toString(Node[i].Output)+"\n");
}
}
// The Sigmoid function calculates the
// activation/output from the current node
private double Sigmoid (double Net) {
return 1/(1+Math.exp(-Net));
}
// Return the output from all node in the layer
// in a vector form
public double[] OutputVector() {
double Vector[];
Vector = new double[Node.length];
for (int i=0; i < Node.length; i++)
Vector[i] = Node[i].Output;
return (Vector);
}
public LAYER (int NumberOfNodes, int NumberOfInputs) {
Node = new NODE[NumberOfNodes];
for (int i = 0; i < NumberOfNodes; i++)
Node[i] = new NODE(NumberOfInputs);
Input = new double[NumberOfInputs];
}
// added by DSK
public NODE[] get_nodes() { return Node; }
}
Node Class:
public class NODE implements Serializable
{
public double Output;
// Output signal from current node
public double Weight[];
// Vector of weights from previous nodes to current node
public double Threshold;
// Node Threshold /Bias
public double WeightDiff[];
// Weight difference between the nth and the (n-1) iteration
public double ThresholdDiff;
// Threshold difference between the nth and the (n-1) iteration
public double SignalError;
// Output signal error
// InitialiseWeights function assigns a randomly
// generated number, between -1 and 1, to the
// Threshold and Weights to the current node
private void InitialiseWeights() {
Threshold = -1+2*Math.random();
// Initialise threshold nodes with a random
// number between -1 and 1
ThresholdDiff = 0;
// Initially, ThresholdDiff is assigned to 0 so
// that the Momentum term can work during the 1st
// iteration
for(int i = 0; i < Weight.length; i++) {
Weight[i]= -1+2*Math.random();
// Initialise all weight inputs with a
// random number between -1 and 1
WeightDiff[i] = 0;
// Initially, WeightDiff is assigned to 0
// so that the Momentum term can work during
// the 1st iteration
}
}
public NODE (int NumberOfNodes) {
Weight = new double[NumberOfNodes];
// Create an array of Weight with the same
// size as the vector of inputs to the node
WeightDiff = new double[NumberOfNodes];
// Create an array of weightDiff with the same
// size as the vector of inputs to the node
InitialiseWeights();
// Initialise the Weights and Thresholds to the node
}
public double[] get_weights() { return Weight; }
public double get_output() { return Output; }
}
I wrote the code in Netbeans exactly like this but it differs in the saving method where the file should be saved!.
How can I load the file correctly so I don't get this exception?
I Solved this by saving the network to XML file and then load it again in android so it just took two hours of training instead of days without any Serialization problems , although it took some time to load that XML I serialized it again to neural_network.ser so it will load much faster
I know it's not the best solution but that what I've done.
Here the is the code:
public void SaveToXML(String FileName)throws
ParserConfigurationException, FileNotFoundException,
TransformerException, TransformerConfigurationException
{
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder parser = factory.newDocumentBuilder();
Document doc = parser.newDocument();
Element root = doc.createElement("neuralNetwork");
Element layers = doc.createElement("structure");
layers.setAttribute("numberOfLayers",Integer.toString(this.NumberOfLayers));
for (int il=0; il<this.NumberOfLayers; il++){
Element layer = doc.createElement("layer");
layer.setAttribute("index",Integer.toString(il));
layer.setAttribute("numberOfNeurons",Integer.toString(this.Layer[il].Node.length));
if(il==0)
{
for(int in=0;in<this.Layer[il].Node.length;in++)
{
Element neuron = doc.createElement("neuron");
neuron.setAttribute("index",Integer.toString(in));
neuron.setAttribute("NumberOfInputs",Integer.toString(1));
neuron.setAttribute("threshold",Double.toString(this.Layer[il].Node[in].Threshold));
Element input = doc.createElement("input");
double[] weights = this.Layer[il].Node[in].get_weights();
input.setAttribute("index",Integer.toString(in));
input.setAttribute("weight",Double.toString(weights[in]));
neuron.appendChild(input);
layer.appendChild(neuron);
}
layers.appendChild(layer);
}
else
{
for (int in=0; in<this.Layer[il].Node.length;in++){
Element neuron = doc.createElement("neuron");
neuron.setAttribute("index",Integer.toString(in));
neuron.setAttribute("NumberOfInputs",Integer.toString(this.Layer[il].Node[in].Weight.length));
neuron.setAttribute("threshold",Double.toString(this.Layer[il].Node[in].Threshold));
for (int ii=0; ii<this.Layer[il].Node[in].Weight.length;ii++) {
double[] weights = this.Layer[il].Node[in].get_weights();
Element input = doc.createElement("input");
input.setAttribute("index",Integer.toString(ii));
input.setAttribute("weight",Double.toString(weights[ii]));
neuron.appendChild(input);
}
layer.appendChild(neuron);
layers.appendChild(layer);
}
}
}
root.appendChild(layers);
doc.appendChild(root);
File xmlOutputFile = new File(FileName);
FileOutputStream fos;
Transformer transformer;
fos = new FileOutputStream(xmlOutputFile);
TransformerFactory transformerFactory = TransformerFactory.newInstance();
transformer = transformerFactory.newTransformer();
DOMSource source = new DOMSource(doc);
StreamResult result = new StreamResult(fos);
transformer.setOutputProperty("encoding","iso-8859-2");
transformer.setOutputProperty("indent","yes");
transformer.transform(source, result);
}
LoadFromXML Function:
public BackPropagation LoadFromXML(String FileName)throws
ParserConfigurationException, SAXException, IOException, ParseException
{
BackPropagation myclass= new BackPropagation();
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder parser = factory.newDocumentBuilder();
File source = new File(FileName);
Document doc = parser.parse(source);
Node nodeNeuralNetwork = doc.getDocumentElement();
if (!nodeNeuralNetwork.getNodeName().equals("neuralNetwork")) throw new ParseException("[Error] NN-Load: Parse error in XML file, neural network couldn't be loaded.",0);
NodeList nodeNeuralNetworkContent = nodeNeuralNetwork.getChildNodes();
System.out.print("<neuralNetwork>\n");
for (int innc=0; innc<nodeNeuralNetworkContent.getLength(); innc++)
{
Node nodeStructure = nodeNeuralNetworkContent.item(innc);
if (nodeStructure.getNodeName().equals("structure"))
{
System.out.print("<stucture nuumberOfLayers = ");
myclass.NumberOfLayers = Integer.parseInt(((Element)nodeStructure).getAttribute("numberOfLayers"));
myclass.Layer = new LAYER[myclass.NumberOfLayers];
System.out.print(Integer.toString(myclass.NumberOfLayers)+">\n");
NodeList nodeStructureContent = nodeStructure.getChildNodes();
for (int isc=0; isc<nodeStructureContent.getLength();isc++)
{
Node nodeLayer = nodeStructureContent.item(isc);
if (nodeLayer.getNodeName().equals("layer"))
{
int index = Integer.parseInt(((Element)nodeLayer).getAttribute("index"));
System.out.print("<layer index = "+Integer.toString(index)+" numberOfNeurons = ");
int number_of_N = Integer.parseInt(((Element)nodeLayer).getAttribute("numberOfNeurons"));
System.out.print(Integer.toString(number_of_N)+">\n");
if(index==0)
{
myclass.Layer[0]=new LAYER(number_of_N,800);
}
else
{
int j=index-1;
myclass.Layer[index]=new LAYER(number_of_N,myclass.Layer[j].Node.length);
}
NodeList nodeLayerContent = nodeLayer.getChildNodes();
for (int ilc=0; ilc<nodeLayerContent.getLength();ilc++)
{
Node nodeNeuron = nodeLayerContent.item(ilc);
if (nodeNeuron.getNodeName().equals("neuron"))
{
System.out.print("<neuron index = ");
int neuron_index = Integer.parseInt(((Element)nodeNeuron).getAttribute("index"));
myclass.Layer[index].Node[neuron_index].Threshold = Double.parseDouble(((Element)nodeNeuron).getAttribute("threshold"));
System.out.print(Integer.toString(neuron_index)+" threshold = "+Double.toString(myclass.Layer[index].Node[neuron_index].Threshold)+">\n");
NodeList nodeNeuronContent = nodeNeuron.getChildNodes();
for (int inc=0; inc < nodeNeuronContent.getLength();inc++)
{
Node nodeNeuralInput = nodeNeuronContent.item(inc);
if (nodeNeuralInput.getNodeName().equals("input"))
{
System.out.print("<input index = ");
int index_input = Integer.parseInt(((Element)nodeNeuralInput).getAttribute("index"));
myclass.Layer[index].Node[neuron_index].Weight[index_input] = Double.parseDouble(((Element)nodeNeuralInput).getAttribute("weight"));
System.out.print(Integer.toString(index_input)+" weight = "+Double.toString(myclass.Layer[index].Node[neuron_index].Weight[index_input])+">\n");
}
}
}
}
}
}
System.out.print("</structure");
}
}
return myclass;
}
I need to justify some text (RTL), which is a string (S1) from the server. But a TextView can't justify text, so I have to use a WebView, now I have to create a HTML file in which
will display S1. And then I store the address of that html file in the database and then I display that html file. I've seen this question asked before on SO and many have recommended to use a 3rd party library, I've tried all of those approaches to no avail (they work in 90% of scenarios but are no fully reliable).
I feel that this approach seems convoluted, I was wondering if there is a better approach?
I use the following code that answer with very people that need this subject and i create formula that support in every display.
public class TextJustify {
final static String SYSTEM_NEWLINE = "\n";
final static float COMPLEXITY = 5.12f; // Reducing this will increase
// efficiency but will decrease
// effectiveness
final static Paint p = new Paint();
/* #author Mathew Kurian */
public static void run(final TextView tv, float origWidth, int paddingLeft, int paddingRight, int marginLeft, int marginRight) {
origWidth-= paddingRight+marginRight+paddingLeft+marginLeft;
String s = tv.getText().toString();
p.setTypeface(tv.getTypeface());
String[] splits = s.split(SYSTEM_NEWLINE);
float width = origWidth - 5;
for (int x = 0; x < splits.length; x++)
if (p.measureText(splits[x]) > width) {
splits[x] = wrap(splits[x], width, p);
String[] microSplits = splits[x].split(SYSTEM_NEWLINE);
for (int y = 0; y < microSplits.length - 1; y++)
microSplits[y] = justify(removeLast(microSplits[y], " "),
width, p);
StringBuilder smb_internal = new StringBuilder();
for (int z = 0; z < microSplits.length; z++)
smb_internal.append(microSplits[z]
+ ((z + 1 < microSplits.length) ? SYSTEM_NEWLINE
: ""));
splits[x] = smb_internal.toString();
}
final StringBuilder smb = new StringBuilder();
for (String cleaned : splits)
smb.append(cleaned + SYSTEM_NEWLINE);
tv.setGravity(Gravity.RIGHT);
tv.setText(smb);
}
private static String wrap(String s, float width, Paint p) {
String[] str = s.split("\\s"); // regex
StringBuilder smb = new StringBuilder(); // save memory
smb.append(SYSTEM_NEWLINE);
for (int x = 0; x < str.length; x++) {
float length = p.measureText(str[x]);
String[] pieces = smb.toString().split(SYSTEM_NEWLINE);
try {
if (p.measureText(pieces[pieces.length - 1]) + length > width)
smb.append(SYSTEM_NEWLINE);
} catch (Exception e) {
}
smb.append(str[x] + " ");
}
return smb.toString().replaceFirst(SYSTEM_NEWLINE, "");
}
private static String removeLast(String s, String g) {
if (s.contains(g)) {
int index = s.lastIndexOf(g);
int indexEnd = index + g.length();
if (index == 0)
return s.substring(1);
else if (index == s.length() - 1)
return s.substring(0, index);
else
return s.substring(0, index) + s.substring(indexEnd);
}
return s;
}
private static String justifyOperation(String s, float width, Paint p) {
float holder = (float) (COMPLEXITY * Math.random());
while (s.contains(Float.toString(holder)))
holder = (float) (COMPLEXITY * Math.random());
String holder_string = Float.toString(holder);
float lessThan = width;
int timeOut = 100;
int current = 0;
while (p.measureText(s) < lessThan && current < timeOut) {
s = s.replaceFirst(" ([^" + holder_string + "])", " "
+ holder_string + "$1");
lessThan = p.measureText(holder_string) + lessThan
- p.measureText(" ");
current++;
}
String cleaned = s.replaceAll(holder_string, " ");
return cleaned;
}
private static String justify(String s, float width, Paint p) {
while (p.measureText(s) < width) {
s = justifyOperation(s, width, p);
}
return s;
}
}
and for calling this you mus use following code, I tested for Persian language and in every display and device worked fine.
public static final int FinallwidthDp = 320 ;
public static final int widthJustify = 223 ;
DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
int widthPixels = metrics.widthPixels;
float scaleFactor = metrics.density;
float widthDp = widthPixels / scaleFactor;
TextView tv = (TextView) findViewById(R.id.textView1);
ViewGroup.MarginLayoutParams lp1 = (ViewGroup.MarginLayoutParams) tv.getLayoutParams();
tv.setText(text);
TextJustify.run(tv,widthDp / FinallwidthDp * widthJustify , tv.getPaddingLeft(),tv.getPaddingRight() , lp1.leftMargin, lp1.rightMargin);
this algorithm tested on various device and worked fine in normal activity (not dialog) and wrap-content width for TextView, and worked with every padding and margin.if not good for you, you can change widthJustify until look good to you, I hope this useful.
for newly update see This
LIBRARY: https://github.com/bluejamesbond/TextJustify-Android
SUPPORTS: Android 2.0 to 5.X; String/Spannables; RTL language support! NO WEBVIEW :)
SCREENSHOT
Try this:
Add a TextViewJustify.java file in src folder.
TextViewJustify.java wil be like this
import android.graphics.Paint;
import android.view.Gravity;
import android.widget.TextView;
public class TextViewJustify {
/*
* PLEASE DO NOT REMOVE Coded by Mathew Kurian I wrote this code for a
* Google Interview for Internship. Unfortunately, I got too nervous during
* the interview that I messed, but anyhow that doesn't matter. I have
* resent my work in hopes that I might still get a position there. Thank
* you :DD
*/
final static String SYSTEM_NEWLINE = "\n";
final static float COMPLEXITY = 5.12f; // Reducing this will increase
// efficiency but will decrease
// effectiveness
final static Paint p = new Paint();
public static void justifyText(final TextView tv, final float origWidth) {
String s = tv.getText().toString();
p.setTypeface(tv.getTypeface());
String[] splits = s.split(SYSTEM_NEWLINE);
float width = origWidth - 5;
for (int x = 0; x < splits.length; x++)
if (p.measureText(splits[x]) > width) {
splits[x] = wrap(splits[x], width, p);
String[] microSplits = splits[x].split(SYSTEM_NEWLINE);
for (int y = 0; y < microSplits.length - 1; y++)
microSplits[y] = justify(removeLast(microSplits[y], " "),
width, p);
StringBuilder smb_internal = new StringBuilder();
for (int z = 0; z < microSplits.length; z++)
smb_internal.append(microSplits[z]
+ ((z + 1 < microSplits.length) ? SYSTEM_NEWLINE
: ""));
splits[x] = smb_internal.toString();
}
final StringBuilder smb = new StringBuilder();
for (String cleaned : splits)
smb.append(cleaned + SYSTEM_NEWLINE);
tv.setGravity(Gravity.LEFT);
tv.setText(smb);
}
private static String wrap(String s, float width, Paint p) {
String[] str = s.split("\\s"); // regex
StringBuilder smb = new StringBuilder(); // save memory
smb.append(SYSTEM_NEWLINE);
for (int x = 0; x < str.length; x++) {
float length = p.measureText(str[x]);
String[] pieces = smb.toString().split(SYSTEM_NEWLINE);
try {
if (p.measureText(pieces[pieces.length - 1]) + length > width)
smb.append(SYSTEM_NEWLINE);
} catch (Exception e) {
}
smb.append(str[x] + " ");
}
return smb.toString().replaceFirst(SYSTEM_NEWLINE, "");
}
private static String removeLast(String s, String g) {
if (s.contains(g)) {
int index = s.lastIndexOf(g);
int indexEnd = index + g.length();
if (index == 0)
return s.substring(1);
else if (index == s.length() - 1)
return s.substring(0, index);
else
return s.substring(0, index) + s.substring(indexEnd);
}
return s;
}
private static String justifyOperation(String s, float width, Paint p) {
float holder = (float) (COMPLEXITY * Math.random());
while (s.contains(Float.toString(holder)))
holder = (float) (COMPLEXITY * Math.random());
String holder_string = Float.toString(holder);
float lessThan = width;
int timeOut = 100;
int current = 0;
while (p.measureText(s) < lessThan && current < timeOut) {
s = s.replaceFirst(" ([^" + holder_string + "])", " "
+ holder_string + "$1");
lessThan = p.measureText(holder_string) + lessThan
- p.measureText(" ");
current++;
}
String cleaned = s.replaceAll(holder_string, " ");
return cleaned;
}
private static String justify(String s, float width, Paint p) {
while (p.measureText(s) < width) {
s = justifyOperation(s, width, p);
}
return s;
}
}
And use this class like this:
TextViewJustify.justifyText(your_text_view, 225f);
In my case it was 225f. change it according to your need.
You can justify Text using WebView Simply
LinearLayout lv=(LinearLayout)dialog.findViewById(R.id.**yourId**);
String text1 = "<html><body>"
+ "<p align=\"justify\">"
+**your text**
+ "</p> "
+ "</body></html>";
WebView wv=new WebView(getApplicationContext());
wv.loadData(text1,"text/html","utf-8");
lv.removeAllViews();
lv.addView(wv);
i made simple class.
this can be used just like TextView
import android.content.Context;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.widget.TextView;
/**
* text justifying
* you can just use like TextView
* #author hyunsikkim
*
*/
public class JustifiedTextView extends TextView {
public JustifiedTextView(Context context) {
super(context);
}
public JustifiedTextView(Context context, AttributeSet attrs) {
super(context, attrs);
}
private void setBreakText(String text) {
if(text == null) return;
String breakText = breakText(getPaint(), text,
getWidth()-this.getPaddingLeft()-this.getPaddingRight());
if(breakText.equals(getText()) == false) {
setText(breakText);
}
}
public String breakText(Paint textPaint, String strText, int breakWidth) {
StringBuilder sb = new StringBuilder();
int endValue = 0;
final String NEW_LINE = "\n";
do{
endValue = textPaint.breakText(strText, true, breakWidth, null);
if(endValue > 0) {
/**
* handle if text contains NEW_LINE
*/
final int index = strText.indexOf(NEW_LINE);
if(0<=index && index <= endValue) {
endValue = index + NEW_LINE.length();
}
final String sub = strText.substring(0, endValue);
sb.append(sub);
/**
* handle breaked text endWidth NEW_LINE
*/
if(sub.endsWith(NEW_LINE) == false) {
if(strText.length() != endValue) {
sb.append(NEW_LINE);
}
}
strText = strText.substring(endValue);
}
} while(endValue > 0);
return sb.toString();
}
public String breakText(Paint textPaint, int id, int breakWidth) {
String strText = getResources().getString(id);
return breakText(textPaint, strText, breakWidth);
}
#Override
protected void onTextChanged(CharSequence text, int start,
int lengthBefore, int lengthAfter) {
super.onTextChanged(text, start, lengthBefore, lengthAfter);
/**
* this control changes from setText(Charsequence text)
*/
if(getWidth() != 0) {
setBreakText(text.toString());
}
}
#Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
/**
* this help to break initial text.
*/
if(w != oldw) {
setBreakText(getText().toString());
}
}
}
Use web view
WebView tv = (WebView) findViewById(R.id.aboutme);
String youtContentStr = String.valueOf(Html
.fromHtml("<![CDATA[<body style=\"text-align:justify;background-color:#00222222;\">"
+ text
+ "</body>]]>"));
tv.setBackgroundColor(Color.TRANSPARENT);
tv.loadData(youtContentStr, "text/html", "utf-8");`