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Legend.javaAPI DocAzureus 3.0.3.47322Thu May 24 06:58:58 BST 2007org.gudy.azureus2.ui.swt.components

Legend

public class Legend extends Object
TODO: have a callback when color changes

Fields Summary
Constructors Summary
Methods Summary
public static org.eclipse.swt.widgets.CompositecreateLegendComposite(org.eclipse.swt.widgets.Composite panel, org.eclipse.swt.graphics.Color[] blockColors, java.lang.String[] keys)
Create a legend containing a modifyable color box and description

param
panel Where to add legend to
param
blockColors array of colors for each legend entry. This array WILL BE modified if the user changes the color
param
keys array of keys for each legend entry
return
The composite containing the legend

		Object layout = panel.getLayout();
		Object layoutData = null;
		if (layout instanceof GridLayout)
			layoutData = new GridData(GridData.FILL_HORIZONTAL);

		return createLegendComposite(panel, blockColors, keys, layoutData);
public static org.eclipse.swt.widgets.CompositecreateLegendComposite(org.eclipse.swt.widgets.Composite panel, org.eclipse.swt.graphics.Color[] blockColors, java.lang.String[] keys, java.lang.Object layoutData)
Create a legend containing a modifyable color box and description

param
panel Where to add legend to
param
blockColors array of colors for each legend entry. This array WILL BE modified if the user changes the color
param
keys array of keys for each legend entry
param
layoutData How to layout the legend (ie. GridData, LayoutData, etc)
return
The composite containing the legend

		
		final ConfigurationManager config = ConfigurationManager.getInstance();

		if (blockColors.length != keys.length)
			return null;

		final Color[] defaultColors = new Color[blockColors.length];
		System.arraycopy(blockColors, 0, defaultColors, 0, blockColors.length);

		Composite legend = new Composite(panel, SWT.NONE);
		if (layoutData != null)
			legend.setLayoutData(layoutData);

		RowLayout layout = new RowLayout(SWT.HORIZONTAL);
		layout.wrap = true;
		layout.marginBottom = 0;
		layout.marginTop = 0;
		layout.marginLeft = 0;
		layout.marginRight = 0;
		layout.spacing = 0;
		legend.setLayout(layout);

		RowData data;
		for (int i = 0; i < blockColors.length; i++) {
			int r = config.getIntParameter(keys[i] + ".red", -1);
			if (r >= 0) {
				int g = config.getIntParameter(keys[i] + ".green");
				int b = config.getIntParameter(keys[i] + ".blue");
				
				Color color = ColorCache.getColor(panel.getDisplay(), r, g, b);
				blockColors[i] = color;
			}

			Composite colorSet = new Composite(legend, SWT.NONE);

			colorSet.setLayout(new RowLayout(SWT.HORIZONTAL));

			final Canvas cColor = new Canvas(colorSet, SWT.BORDER);
			cColor.setData("Index", new Integer(i));
			// XXX Use paint instead of setBackgrond, because OSX does translucent
			// crap
			cColor.addPaintListener(new PaintListener() {
				public void paintControl(PaintEvent e) {
					int i = ((Integer)cColor.getData("Index")).intValue();
					e.gc.setBackground(blockColors[i]);
					e.gc.fillRectangle(e.x, e.y, e.width, e.height);
				}
			});

			cColor.addMouseListener(new MouseAdapter() {
				public void mouseUp(MouseEvent e) {
					Integer iIndex = (Integer)cColor.getData("Index");
					if (iIndex == null)
						return;
					int index = iIndex.intValue();

					if (e.button == 1) {
						ColorDialog cd = new ColorDialog(panel.getShell());
						cd.setRGB(blockColors[index].getRGB());
						
						RGB rgb = cd.open();
						if (rgb != null)
							config.setRGBParameter(keys[index], rgb.red, rgb.green, rgb.blue);
					} else {
						config.removeRGBParameter(keys[index]);
					}
				}
			});

			Label lblDesc = new Label(colorSet, SWT.NULL);
			Messages.setLanguageText(lblDesc, keys[i]);

			data = new RowData();
			data.width = 20;
			data.height = lblDesc.computeSize(SWT.DEFAULT, SWT.DEFAULT).y - 3;
			cColor.setLayoutData(data);
			
			// If color changes, update our legend
			config.addParameterListener(keys[i], new ParameterListener() {
				public void parameterChanged(String parameterName) {
					for (int j = 0; j < keys.length; j++) {
						if (keys[j].equals(parameterName)) {
							final int index = j;

							final int r = config.getIntParameter(keys[j] + ".red", -1);
							if (r >= 0) {
								final int g = config.getIntParameter(keys[j] + ".green");
								final int b = config.getIntParameter(keys[j] + ".blue");
								
								final RGB rgb = new RGB(r, g, b);
								if (blockColors[j].isDisposed()
										|| !rgb.equals(blockColors[j].getRGB())) {

									Utils.execSWTThread(new AERunnable() {
										public void runSupport() {
											if (panel == null || panel.isDisposed())
												return;
											Color color = ColorCache.getColor(panel.getDisplay(), r, g, b);
											blockColors[index] = color;
											cColor.redraw();
										}
									});
								}
							} else {
								if (blockColors[j].isDisposed()
										|| !blockColors[j].equals(defaultColors[j])) {
									Utils.execSWTThread(new AERunnable() {
										public void runSupport() {
											if (panel == null || panel.isDisposed())
												return;
											blockColors[index] = defaultColors[index];
											cColor.redraw();
										}
									});
								}
							}
						}
					}
				}
			});
		}
		
		legend.addDisposeListener(new DisposeListener() {
			public void widgetDisposed(DisposeEvent e) {
				// We don't want to give them disposed colors
				// Restore defaults in case blockColors is a static or is used
				// afterwards, or if the view wants to dispose of the old colors.
				for (int i = 0; i < blockColors.length; i++) {
					blockColors[i] = defaultColors[i];
				}
			}
		});

		return legend;