When using HTML in my JTable cells it will be displayed as
<html><b>Example</html></b>
and not with the proper html styles. I read that default renderers work with html text. How do i change my custom renderer to display HTML correctly ?
My Jtable:
tab_months = new JTable(tabmod_months) {
#Override public Component prepareRenderer(TableCellRenderer renderer,
int row,
int col){
Component c = super.prepareRenderer(renderer, row, col);
int selCol = tab_months.getSelectedColumn();
int selRow = tab_months.getSelectedRow();
if ( selCol != -1 && selRow != -1 ){
if (row == selRow){
c.setBackground(new Color(163,198,255));
} else {
c.setBackground(new Color(255,240,245));
}
}
if (row>=0 && row<listOpenmonths.size()+1) {
setToolTipText(listOpenmonths.get(row).getmonthsString());
}
return c;
}
};
Found the problem: my html tag was inside of the string and it wasn't recognized...changed the string format and it worked. Thank you !
Related
I want to create a JTable where in the cells there could be an ImageIcon, String or both. I've already tried solutions like table.setvalue() or just adding the Icon to the Object Array for creating the JTable.
for (int n = 0; n < tableHeight; n++) {
for (int m = 0; m < tableWidth; m++) {
if ((n + m) == labelArray.size()) {
break;
}
if (labelArray.get(n + m).iconMode) { //iconMode is True if there is an icon instead of line text
data[n][m] = null;
} else {
String text = new String("<html><p>" + labelArray.get(n + m).lineOne + "<br>" + labelArray.get(n + m).lineTwo + "<p></html>");
data[n][m] = text;
}
}
}
table = new JTable(data, columnNames);
renderer = new DefaultTableCellRenderer();
renderer.setHorizontalTextPosition(JLabel.CENTER);
renderer.setHorizontalAlignment(JLabel.CENTER);
for (int n = 0; n < tableWidth; n++) {
table.getColumnModel().getColumn(n).setCellRenderer(renderer);
table.getColumnModel().getColumn(n).setWidth(50);
}
there could be an ImageIcon, String or both.
You will need to create a custom object to store in the TableModel. This object will contain two properties:
text
icon
Then you will need to create a custom renderer (not use the default renderer) to display this object.
The custom renderer might look something like:
class CustomRenderer extends DefaultTableCellRenderer
{
public CustomRenderer()
{
super();
setHorizontalTextPosition(JLabel.CENTER);
setHorizontalAlignment(JLabel.CENTER);
}
#Override
public Component getTableCellRendererComponent(
JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column)
{
super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
CustomObject custom = (CustomObject)value;
setText( custom.getText() );
setIcon( custom.getIcon() );
return this;
}
}
I recently learned that I can create a custom DefaultTableCellRenderer class for a JTable.
However, my code only colors the entire row but not the specific columns / cells I want to color based on a condition.
How can I specify the row and column in the DefaultTableCellRenderer class I created?
So here are the classes I created.
public class Schedule extends JPanel(){
public Schedule(){
schedulesJtbl.setDefaultRenderer(Object.class, new ScheduleTableCellRenderer());
int startTime = 1230, endTime = 1330;
int jtStartTime = scheduleJtbl.getValueAt(0,1);
int jtEndTime = scheduleJtbl.getValueAt(0,2);
int conflictCheck = 0;
// duplicate startTime and endTime
if((startTime == jtStartTime) && (endTime == jtEndTime)){
conflictCheck++
ScheduleTableCellRenderer.setConflict(conflictCheck);
}
//duplicate startTime
else if(startTime == jtStartTime){
conflictCheck++
ScheduleTableCellRenderer.setConflict(conflictCheck);
}
}
and here's the ScheduleTableCellRenderer
public class ScheduleTableCellRenderer extends DefaultTableCellRenderer {
static int conflict = 0;
#Override
public Component getTableCellRendererComponent(
JTable table, Object value,
boolean isSelected, boolean hasFocus,
int row, int col) {
Component c = super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, col);
if (conflict > 0) {
c.setBackground(Color.RED);
} else if (conflict == 0) {
c.setBackground(Color.GREEN);
}
return c;
}
public static void setConflict(int aConflict) {
conflict = aConflict;
}
}
If it's only startTime(as second condition on if) that duplicated, how can I color only column 2 but not the entire row just like what is happening right now on my JTable.
I hope you can help me.
Thank you.
schedulesJtbl.setDefaultRenderer(Object.class, new ScheduleTableCellRenderer());
That sets the default renderer for all Objects in any row/column.
To set the renderer for a specific column you do:
table.getColumnModel().getColumn(???).setCellRenderer( ... );
You also need to reset the default background:
if (conflict > 0) {
c.setBackground(Color.RED);
} else if (conflict == 0) {
c.setBackground(Color.GREEN);
} else {
c.setBackgrund( table.getBackground() );
}
Ive searched through but cant seem to find an answer thats similar.
Id like to color a selected row AND at the same time permanently color other rows.
i.e have the total Column always GRAY but dynamically make the selected row GRAY
Im trying
JTable table = new JTable(model) {
public Component prepareRenderer(TableCellRenderer renderer, int index_row, int index_col) {
Component comp = super.prepareRenderer(renderer, index_row, index_col);
//odd col index, selected or not selected
if(isCellSelected(index_row, index_col)){
comp.setBackground(Color.GRAY);
}
if (index_col == 34) {
comp.setBackground(Color.GRAY);
} else {
comp.setBackground(Color.WHITE);
setSelectionForeground(Color.BLUE);
setSelectionBackground(Color.GRAY); // Thought this would work but has no affect.
// comp.setFont(new Font("Serif", Font.BOLD, 12));
}
return comp;
}
};
But its not changing the background Color on selected Row, Just the Total Row.
I'm not sure, but I think you need an "else" after the if (isCellSelected(index_row, index_col))
block. This could solve your problem:
...
if (isCellSelected(index_row, index_col)){
comp.setBackground(Color.GRAY);
} else {
if (index_col == 34) {
comp.setBackground(Color.GRAY);
} else {
comp.setBackground(Color.WHITE);
}
}
...
Is it possible to fill JTable in such a way that each cell contains a String consisted of two lines?
String cellText = "Line 1 \n Line 2";
In my JTable I see cellText displayed as a single line.
You'll want to use a custom JTextArea renderer.
http://www.coderanch.com/t/340609/GUI/java/JTable-Custom-Cell-Renderer-JTextArea
This is one I've used over the years:
import javax.swing.*;
import javax.swing.table.*;
import java.awt.*;
import java.util.*;
public class TextAreaRenderer extends JTextArea implements TableCellRenderer {
private final DefaultTableCellRenderer adaptee = new DefaultTableCellRenderer();
/** map from table to map of rows to map of column heights */
private final Map cellSizes = new HashMap();
public TextAreaRenderer() {
setLineWrap(true);
setWrapStyleWord(true);
}
public Component getTableCellRendererComponent(
JTable table, Object obj, boolean isSelected,
boolean hasFocus, int row, int column) {
// set the colours, etc. using the standard for that platform
adaptee.getTableCellRendererComponent(table, obj,
isSelected, hasFocus, row, column);
setForeground(adaptee.getForeground());
setBackground(adaptee.getBackground());
setBorder(adaptee.getBorder());
setFont(adaptee.getFont());
setText(adaptee.getText());
// This line was very important to get it working with JDK1.4
TableColumnModel columnModel = table.getColumnModel();
setSize(columnModel.getColumn(column).getWidth(), 100000);
int height_wanted = (int) getPreferredSize().getHeight();
addSize(table, row, column, height_wanted);
height_wanted = findTotalMaximumRowSize(table, row);
if (height_wanted != table.getRowHeight(row)) {
table.setRowHeight(row, height_wanted);
}
return this;
}
#SuppressWarnings("unchecked")
private void addSize(JTable table, int row, int column, int height) {
Map rows = (Map) cellSizes.get(table);
if (rows == null) {
cellSizes.put(table, rows = new HashMap());
}
Map rowheights = (Map) rows.get(new Integer(row));
if (rowheights == null) {
rows.put(new Integer(row), rowheights = new HashMap());
}
rowheights.put(new Integer(column), new Integer(height));
}
/**
* Look through all columns and get the renderer. If it is
* also a TextAreaRenderer, we look at the maximum height in
* its hash table for this row.
*/
private int findTotalMaximumRowSize(JTable table, int row) {
int maximum_height = 0;
Enumeration columns = table.getColumnModel().getColumns();
while (columns.hasMoreElements()) {
TableColumn tc = (TableColumn) columns.nextElement();
TableCellRenderer cellRenderer = tc.getCellRenderer();
if (cellRenderer instanceof TextAreaRenderer) {
TextAreaRenderer tar = (TextAreaRenderer) cellRenderer;
maximum_height = Math.max(maximum_height,
tar.findMaximumRowSize(table, row));
}
}
return maximum_height;
}
private int findMaximumRowSize(JTable table, int row) {
Map rows = (Map) cellSizes.get(table);
if (rows == null) {
return 0;
}
Map rowheights = (Map) rows.get(new Integer(row));
if (rowheights == null) {
return 0;
}
int maximum_height = 0;
for (Iterator it = rowheights.entrySet().iterator();
it.hasNext();) {
Map.Entry entry = (Map.Entry) it.next();
int cellHeight = ((Integer) entry.getValue()).intValue();
maximum_height = Math.max(maximum_height, cellHeight);
}
return maximum_height;
}
}
which you would call with something like this:
table.getColumn("Column").setCellRenderer(new TextAreaRenderer());
JTable Cell data follows html syntax and rules. So you can use <br> to put line separator. hope this helps.
All - I'm trying to set a specific cell's background color after it is clicked AND a successful operation has occurred. I cant seem to do it. Here is the code:
JTable table = new JTable(new DefaultTableModel());
String [] colNames = {"col1", "col2", "ClickMe"};
for (String name : colNames)
table.addColumn(name);
.... some code .....
String [] someArray = {"t", "t2", "t3"};
....
for (int i=0; i<someArray.length;i++) {
Object [] row = new Object[3];
row[0] = "bla";
row[1] = "bla";
row[2] = "Update";
((DefaultTableModel)table.getModel()).addRow(row);
((DefaultTableCellRenderer)gameTable.getCellRenderer(i, 2)).setBackground(Color.LIGHT_GRAY);
((DefaultTableCellRenderer)gameTable.getCellRenderer(i, 2)).setHorizontalAlignment(JLabel.CENTER);
}
table.addMouseListener(new MouseListener() {
public void mouseClicked(MouseEvent e) {
int row = gameTable.rowAtPoint(e.getPoint());
int col = gameTable.columnAtPoint(e.getPoint());
if (col == 2) {
Color cellColor = ((DefaultTableCellRenderer)gameTable.getCellRenderer(row,col)).getBackground();
if (cellColor == Color.LIGHT_GREY) {
String val1 = (String)table.getModel().getValueAt(row,1);
String val2 = (String)table.getModel().getValueAt(row,0);
if (doSomething(val1, val2)) { //this returns either true or false, its a Database operations
((DefaultTableCellRenderer)table.getCellRenderer(row, 2)).setBackground(Color.BLUE);
}
}
}
};
Even thought i am specific calling setBackground on a row & column, it makes every cell in every row in column "2" change background color instead of just one specific one.
All the examples with customRenderers seem to just change the color based on when its clicked just change it to something else, i need to do some processing as well.
any thoughts here?
Thanks-
Try this
table.setDefaultRenderer(Object.class, new TableCellRenderer(){
private DefaultTableCellRenderer DEFAULT_RENDERER = new DefaultTableCellRenderer();
private Component comp;
#Override
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
Component c = DEFAULT_RENDERER.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
if(isSelected){
c.setBackground(Color.YELLOW);
}else{
if (row%2 == 0){
if (column==2){
c.setBackground(Color.WHITE);
}
else {
c.setBackground(Color.LIGHT_GRAY);
} } }
return c;
}
});