Mega Code Archive
Demonstrates the ColorDialog class
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//Send questions, comments, bug reports, etc. to the authors:
//Rob Warner (rwarner@interspatial.com)
//Robert Harris (rbrt_harris@yahoo.com)
import org.eclipse.swt.*;
import org.eclipse.swt.events.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;
/**
* This class demonstrates the ColorDialog class
*/
public class ChooseColor {
private Color color;
/**
* Runs the application
*/
public void run() {
Display display = new Display();
Shell shell = new Shell(display);
shell.setText("Color Chooser");
createContents(shell);
shell.pack();
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
// Dispose the color we created for the Label
if (color != null) {
color.dispose();
}
display.dispose();
}
/**
* Creates the window contents
*
* @param shell the parent shell
*/
private void createContents(final Shell shell) {
shell.setLayout(new GridLayout(2, false));
// Start with Celtics green
color = new Color(shell.getDisplay(), new RGB(0, 255, 0));
// Use a label full of spaces to show the color
final Label colorLabel = new Label(shell, SWT.NONE);
colorLabel.setText(" ");
colorLabel.setBackground(color);
Button button = new Button(shell, SWT.PUSH);
button.setText("Color...");
button.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent event) {
// Create the color-change dialog
ColorDialog dlg = new ColorDialog(shell);
// Set the selected color in the dialog from
// user's selected color
dlg.setRGB(colorLabel.getBackground().getRGB());
// Change the title bar text
dlg.setText("Choose a Color");
// Open the dialog and retrieve the selected color
RGB rgb = dlg.open();
if (rgb != null) {
// Dispose the old color, create the
// new one, and set into the label
color.dispose();
color = new Color(shell.getDisplay(), rgb);
colorLabel.setBackground(color);
}
}
});
}
/**
* The application entry point
*
* @param args the command line arguments
*/
public static void main(String[] args) {
new ChooseColor().run();
}
}
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