java.awt.Event#ALT_MASK源码实例Demo

private int defaultStopHotkeyModifiers() {
  int mod = Event.SHIFT_MASK + Event.META_MASK;
  if (!Settings.isMac()) {
    mod = Event.SHIFT_MASK + Event.ALT_MASK;
  }
  return mod;
}
 

public static Keys getMenuKey() {
    int keyMask = Toolkit.getDefaultToolkit().getMenuShortcutKeyMask();
    if (keyMask == Event.CTRL_MASK) {
        return Keys.CONTROL;
    }
    if (keyMask == Event.META_MASK) {
        return Keys.META;
    }
    if (keyMask == Event.ALT_MASK) {
        return Keys.ALT;
    }
    throw new WebDriverException("Unable to find the keymask... not control or meta?");
}
 

@Override
public void keyPressed(final KeyEvent ke) {
	final Object source = ke.getSource();
	if (! (source instanceof DisplayCanvas)) return;
	final DisplayCanvas dc = (DisplayCanvas)source;
	final Roi roi = dc.getFakeImagePlus().getRoi();

	final int mod = ke.getModifiers();

	switch (ke.getKeyCode()) {
		case KeyEvent.VK_C:
			// copy into ImageJ clipboard
			// Ignoring masks: outside is already black, and ImageJ cannot handle alpha masks.
			if (0 == (mod ^ (Event.SHIFT_MASK | Event.ALT_MASK))) {
				// Place the source image, untransformed, into clipboard:
				final ImagePlus imp = getImagePlus();
				if (null != imp) imp.copy(false);
			} else if (0 == mod || (0 == (mod ^ Event.SHIFT_MASK))) {
				CoordinateTransformList<CoordinateTransform> list = null;
				if (hasCoordinateTransform()) {
					list = new CoordinateTransformList<CoordinateTransform>();
					list.add(getCoordinateTransform());
				}
				if (0 == mod) { //SHIFT is not down
					final AffineModel2D am = new AffineModel2D();
					am.set(this.at);
					if (null == list) list = new CoordinateTransformList<CoordinateTransform>();
					list.add(am);
				}
				ImageProcessor ip;
				if (null != list) {
					final TransformMesh mesh = new TransformMesh(list, meshResolution, o_width, o_height);
					final TransformMeshMapping mapping = new TransformMeshMapping(mesh);
					ip = mapping.createMappedImageInterpolated(getImageProcessor());
				} else {
					ip = getImageProcessor();
				}
				new ImagePlus(this.title, ip).copy(false);
			}
			ke.consume();
			break;
		case KeyEvent.VK_F:
			// fill mask with current ROI using
			if (null != roi && M.isAreaROI(roi)) {
				Bureaucrat.createAndStart(new Worker.Task("Filling image mask") {
					@Override
					public void exec() {
						getLayerSet().addDataEditStep(Patch.this);
						if (0 == mod) {
							addAlphaMask(roi, ProjectToolbar.getForegroundColorValue());
						} else if (0 == (mod ^ Event.SHIFT_MASK)) {
							// shift is down: fill outside
							try {
								final Area localRoi = M.areaInInts(M.getArea(roi)).createTransformedArea(at.createInverse());
								final Area invLocalRoi = new Area(new Rectangle(0, 0, getOWidth()	, getOHeight()));
								invLocalRoi.subtract(localRoi);
								addAlphaMaskLocal(invLocalRoi, ProjectToolbar.getForegroundColorValue());
							} catch (final NoninvertibleTransformException e) {
								IJError.print(e);
								return;
							}
						}
						getLayerSet().addDataEditStep(Patch.this);
						try { updateMipMaps().get(); } catch (final Throwable t) { IJError.print(t); } // wait
						Display.repaint();
					}
				}, project);
			}
			// capturing:
			ke.consume();
			break;
		default:
			super.keyPressed(ke);
			break;
	}
}
 

@Override
public void keyPressed(final KeyEvent ke) {
	super.keyPressed(ke);
	if (ke.isConsumed()) return;
	if (!ke.getSource().equals(ProjectTree.this) || !project.isInputEnabled()) {
		return;
	}
	// get the first selected node only
	TreePath path = getSelectionPath();
	if (null == path) return;
	DefaultMutableTreeNode node = (DefaultMutableTreeNode)path.getLastPathComponent();
	if (null == node) return;
	final ProjectThing pt = (ProjectThing)node.getUserObject();
	if (null == pt) return;
	//
	final int flags = ke.getModifiers();
	switch (ke.getKeyCode()) {
		case KeyEvent.VK_PAGE_UP:
			move(node, -1);
			ke.consume(); // in any case
			break;
		case KeyEvent.VK_PAGE_DOWN:
			move(node, 1);
			ke.consume(); // in any case
			break;
		case KeyEvent.VK_F2:
			rename(pt);
			ke.consume();
			break;
		case KeyEvent.VK_H:
			if (0 == (flags ^ Event.ALT_MASK)) {
				pt.setVisible(true);
				ke.consume();
			} else if (0 == flags) {
				pt.setVisible(false);
				ke.consume();
			}
			break;
		case KeyEvent.VK_A:
			if (0 == flags || (0 == (flags ^ Event.SHIFT_MASK))) {
				selectInDisplay(pt, 0 == (flags ^ Event.SHIFT_MASK));
				ke.consume();
			}
			break;
		case KeyEvent.VK_3:
			if (0 == flags) {
				ini.trakem2.display.Display3D.showAndResetView(pt);
				ke.consume();
				break;
			}
			// else, flow:
		case KeyEvent.VK_1:
		case KeyEvent.VK_2:
		case KeyEvent.VK_4:
		case KeyEvent.VK_5:
		case KeyEvent.VK_6:
		case KeyEvent.VK_7:
		case KeyEvent.VK_8:
		case KeyEvent.VK_9:
			// run a plugin, if any
			if (pt.getObject() instanceof Displayable && null != Utils.launchTPlugIn(ke, "Project Tree", project, (Displayable)pt.getObject())) {
				ke.consume();
			}
			break;
	}
	ke.consume();
}