i need to change my jtable appearance .
i have these data :
image image.
title String.
date String .
description String.
auteur String .
img , title , date ,description ,auteur.
my question is :
is that possible that i can show in every row these data as twitter feed appearance .
i want to show all these data in the same cell with a sample .
thanks every one .
You should use a JList (or a JTable, but with only one cell per row, a JList seems to be more appropriate) with a custom cell renderer.
Create your data class
public class MyData {
// image, title, date, description and author
}
Create your cell renderer
class MyCellRenderer extends JLabel implements ListCellRenderer<MyData> {
public Component getListCellRendererComponent(
JList<?> list, // the list
MyData value, // value to display
int index, // cell index
boolean isSelected, // is the cell selected
boolean cellHasFocus) // does the cell have focus
{
// tune your component in the way you want, for example
this.setText(value.getTitle());
// return the component to draw for this cell
return this;
}
}
Of course, your cell renderer can extends another component like JPanel.
Finally, instantiate a JList and set your custom renderer
JList<MyData> list = new JList<>();
list.setCellRenderer(new MyCellRenderer());
Related
I have a JTable object which displays the content of an Excel table. Once another Excel table is loaded, the differences have to be displayed (so some cells will change its background color, blue for example). This is the structure of my table.
And this is my code:
tblGSM.setDefaultRenderer(Object.class, new CustomTableRenderer(diffs));
CustomTableRenderer.java
public class CustomTableRenderer extends DefaultTableCellRenderer {
private Vector<Diff> diffs;
public PersoTableRenderer(Vector<Diff> diffs){
this.diffs = diffs;
}
#Override
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
Component c = null;
for (int x = 0; x < diffs.size(); x++){
Diff d = diffs.elementAt(x);
c = super.getTableCellRendererComponent(table, value, isSelected, hasFocus,
d.getRow(), d.getColumn());
c.setBackground(Color.BLUE);
}
return c;
}}
Diff.java
/*
A class to store the difference of corresponding cells
*/
public class Diff {
private int row, col;
public Diff(int row, int col){
this.row = row;
this.col = col;
}
public Diff(){
this(0,0);
}
public int getRow(){
return row;
}
public int getColumn(){
return col;
}
}
My question is diffs is populated correctly, yet the cells colors which are should be changed are not. Turns out all cells in column 1, 2, ,3, and 7 are changed. What it the solution, then?
From the documentation for DefaultTableCellRenderer (emphasis mine):
However JTable employs a unique mechanism for rendering its cells and therefore requires some slightly modified behavior from its cell renderer. The table class defines a single cell renderer and uses it as a as a rubber-stamp for rendering all cells in the table; it renders the first cell, changes the contents of that cell renderer, shifts the origin to the new location, re-draws it, and so on.
So as you can see, super.getTableCellRendererComponent() may return the same component for multiple cells, and thus your approach will not work.
Note that getTableCellRendererComponent is called once per cell as it is rendering, so in addition to the above caveat, your general approach of setting all renderer components in the table to blue when retrieving a single cell's component is not correct.
Instead you will want to only modify the background color of the component being requested, like (pseudo-code):
c = super.getTableCellRendererComponent(..., row, column)
// also don't forget to translate to model coords
model_row = table.convertRowIndexToModel(row)
model_column = table.convertColumnIndexToModel(column)
if diffs contains model_row,model_column:
c.setBackground(blue)
else
c.setBackground(table.getBackground()) // don't forget to reset
return c
Noting that you also have to reset the background color to its default if its not a "diff" cell, since as the docs state, the components are shared among multiple cells.
By the way, rather than storing the Vector<Diff> in your renderer, you really ought to be using a proper TableModel for this, and then querying the model for information. With a sanely implemented model this will also give you constant-time lookups of whether or not a cell should be blue, rather than having to search through the entire list of Diffs.
PS: Don't forget to translate your renderer/view coordinates to model coordinates when working with your Diffs, assuming they are in model coordinates. View coordinates may not agree with model coordinates if e.g. the table is sorted or the user has rearranged the columns. I've shown this in the above pseudo code.
Here is a complete example showing the use of a table model and per-cell custom backgrounds. You can sort the table and rearrange its columns.
I have a JPanel like below
The data in the Transaction table (RIGHT) is generated from a MySQL resultset when the user selects a row in the Plot Table (LEFT). Code below:
tableModelTran.getDataVector().removeAllElements();
if (rs.isBeforeFirst()) {
while (rs.next()) {
java.util.Vector data = new java.util.Vector();
data.add(rs.getString(1));
data.add(rs.getString(2));
data.add(new java.text.SimpleDateFormat("dd/MM/yyyy").format(rs.getDate(3)));
data.add(String.valueOf(new java.text.SimpleDateFormat("MMMM yyyy").format(rs.getDate(3))).toUpperCase());
data.add(rs.getString(4));
data.add(rs.getString(5));
data.add(rs.getString(6));
data.add(rs.getBoolean(7));
tableModelTran.addRow(data);
}
performTotals();
}
I would like to change the colour of the rows to GREEN if the 'Verified' column is ticked and leave uncoloured if it is not. Also, if the user changes the value of the column, the colour should update accordingly. Any and all help is appreciated.
EDIT:
I created a class and added it to my constructor as below:
static class ColorRenderer extends javax.swing.table.DefaultTableCellRenderer {
#Override
public java.awt.Component getTableCellRendererComponent(javax.swing.JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
java.awt.Component c = super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
if (value.equals(true)) {
c.setBackground(java.awt.Color.GREEN);
}
return c;
}
public PlotDetailsWindow() {
initComponents();
....
....
transactionTable.setDefaultRenderer(Boolean.class, new ColorRenderer());
....
....
}
Now whenever I click select a row from the table on the left, if the first value is false, it will not change the colour but if it is true it will change just the 'Verified' column to green and then it doesn't matter if the value is true or false it will always be green. Also, the check boxes turned to true/false now.
I would like to change the colour of the rows to GREEN if the 'Verified' column is ticked
Check out Table Row Rendering.
It shows how to override the prepareRenderer(...) method of JTable to color an entire row based on the data in the row.
The basic structure for overriding this method would be as follows:
JTable table = new JTable(...)
{
public Component prepareRenderer(
TableCellRenderer renderer, int row, int column)
{
Component c = super.prepareRenderer(renderer, row, column);
// add custom rendering here
return c;
}
};
I have a list of expences that looks like this :
My List
I would like the elements of the list to appear as if formatted with \t :
PRODUCT NAME PRICE DATE
PRODUCT NAME PRICE DATE
ect. I created DefaultListCellRenderer but I don't know how to implement this formatting.. If it's not doable, than at least how do I center the elements?
My DefaultListCellRenderer looks like this at the moment :
private class MyListRenderer extends DefaultListCellRenderer {
private static final long serialVersionUID = 1L;
public Component getListCellRendererComponent( JList<?> list,
Object value, int index, boolean isSelected,
boolean cellHasFocus )
{
Component c = super.getListCellRendererComponent( list, value, index,
isSelected, cellHasFocus );
Color czerwony = new Color(205, 16, 26);
setForeground(czerwony);
return(this);
}
}
Shoot, I'll make my comment an answer: use a JTable to display tabular data since it excels at this and was built for this. Otherwise if you want to create your own kludge of a Table via a JList, you'll be forced to use mono-spaced fonts and code that can easily break if one item of data exceeds the expected width of that column.
If you have restrictions on why you can't or are not allowed to use this, then please by all means share this with us.
I have a table where each row represents a picture. In the column Path I store its absolute path. The string being kinda long, I would like that when I hover the mouse over the specific cell, a tooltip should pop-up next to the mouse containing the information from the cell.
Just use below code while creation of JTable object.
JTable auditTable = new JTable(){
//Implement table cell tool tips.
public String getToolTipText(MouseEvent e) {
String tip = null;
java.awt.Point p = e.getPoint();
int rowIndex = rowAtPoint(p);
int colIndex = columnAtPoint(p);
try {
tip = getValueAt(rowIndex, colIndex).toString();
} catch (RuntimeException e1) {
//catch null pointer exception if mouse is over an empty line
}
return tip;
}
};
I assume you didn't write a custom CellRenderer for the path but just use the DefaultTableCellRenderer. You should subclass the DefaultTableCellRenderer and set the tooltip in the getTableCellRendererComponent. Then set the renderer for the column.
class PathCellRenderer extends DefaultTableCellRenderer {
public Component getTableCellRendererComponent(
JTable table, Object value,
boolean isSelected, boolean hasFocus,
int row, int column) {
JLabel c = (JLabel)super.getTableCellRendererComponent( /* params from above (table, value, isSelected, hasFocus, row, column) */ );
// This...
String pathValue = <getYourPathValue>; // Could be value.toString()
c.setToolTipText(pathValue);
// ...OR this probably works in your case:
c.setToolTipText(c.getText());
return c;
}
}
...
pathColumn.setCellRenderer(new PathCellRenderer()); // If your path is of specific class (e.g. java.io.File) you could set the renderer for that type
...
Oracle JTable tutorial on tooltips
You say you store an absolute path in a cell. You are probably using a JLabel for setting absolute path string. Suppose you have a label in your cell, use html tags for expressing tooltip content:
JLabel label = new JLabel("Bla bla");
label.setToolTipText("<html><p>information about cell</p></html>");
setToolTipText() can be used for some other Swing components if you are using something other than JLabel.
I have a JTable and i want a cell (or its row) painted in red when the value entered is higher than a certain value. I'm checking that into a TableModelListener to detect TableChange, so I see no way of colouring the table at the renderer (yet I'm sure it is possible, only it is unknown for me).
I also saw this question but i don't know how to use it.
that job for prepareRendered as you can see here
Following is for single table cell you can extend it for row:
First take table column you want to pint and then add a TableCellRenderer to it as follows:
TableColumnModel columnModel = myTable.getColumnModel();
TableColumn column = columnModel.getColumn(5); // Give column index here
column.setCellRenderer(new MyTableCellRenderer());
Make MyTableCellRendere class which implements TableCellRenderer and extends JLabel(so that we can give a background color to it). It will look something like following:
public class MyTableCellRenderer extends JLabel implements TableCellRenderer {
public Component getTableCellRendererComponent(JTable table,
Object value, boolean isSelected, boolean hasFocus, int row,
int col) {
JLabel jLabel = (JLabel) value;
setBackground(jLabel.getBackground());
setForeground(UIConstants.black);
setText(jLabel.getText());
return this;
}
}
Now in method where you are listening table cell value change do something like follow:
JLabel label = new JLabel(changedValue);
// check for some condition
label.setBackground(Color.red); // set color based on some condition
myTable.setValueAt(label, 0, 5); // here 0 is rowNumber and 5 is colIndex that should be same used to get tableColumn before.