/** Factory method to get the canvas singleton object. */
public static Canvas getCanvas() {
if (canvasSingleton == null) {
canvasSingleton = new Canvas("BlueJ Picture Demo", 500, 300, Color.white);
}
canvasSingleton.setVisible(true);
return canvasSingleton;
}
/** Factory method to get the canvas singleton object. */
public static Canvas getCanvas() {
if (canvasSingleton == null) {
canvasSingleton = new Canvas("BlueJ Shapes Demo", 1400, 600, Color.gray);
}
canvasSingleton.setVisible(true);
return canvasSingleton;
}
/** Factory method to get the canvas singleton object. */
public static Canvas getCanvas() {
if (canvasSingleton == null) {
canvasSingleton = new Canvas(Constants.TITLE, Constants.SIZE, Constants.SIZE, Color.white);
}
canvasSingleton.setVisible(true);
return canvasSingleton;
}
/**
* Called to change the visibility of the outline.
*
* @param value true if visible.
*/
public void setVisible(final boolean value) {
if (value != isVisible()) {
super.setVisible(value);
Container parent = getParent();
if ((parent != null) && (parent.getComponentCount() == 1)) {
parent.setVisible(value);
}
invalidate();
try {
for (; parent != null; parent = parent.getParent()) {
try {
parent.getClass().getMethod("resetToPreferredSizes", null).invoke(parent, null);
visibleArgs[0] = new Integer(value ? 10 : 0);
parent.getClass().getMethod("setDividerSize", visibleParms).invoke(parent, visibleArgs);
break;
} catch (final Throwable ignored) {
}
}
} catch (final Throwable ignored) {
}
djvuBean.recursiveRevalidate();
}
}
public static void main(String[] args) {
Canvas canvas = new Canvas();
canvas.setTitle("canvas sample");
canvas.setSize(600, 200);
canvas.setLocationRelativeTo(null);
canvas.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
CanvasData dd = new CanvasData(300);
NewPanel p = new NewPanel(dd);
canvas.add(p);
canvas.setVisible(true);
}
private void initCanvas() {
canvas = new Canvas();
canvas.setVisible(true);
canvas = buffer.enableGLCanvasRenderer();
this.add(canvas);
}
public void togglePause() {
toggleCursor();
paused = !paused;
canvas.setVisible(!canvas.isVisible());
}
public synchronized void setVisible(boolean b) {
if (b == isVisible()) return;
super.setVisible(b);
if (!b) clearlines();
}
