public void dispose() {
if (editor != null) {
editor.dispose();
editor = null;
}
if (canvas != null && !canvas.isDisposed()) {
canvas.dispose();
}
canvas = null;
if (valueImage != null && !valueImage.isDisposed()) {
valueImage.dispose();
}
valueImage = null;
if (nameLayout != null && !nameLayout.isDisposed()) {
nameLayout.dispose();
}
nameLayout = null;
if (valueLayout != null && !valueLayout.isDisposed()) {
valueLayout.dispose();
}
valueLayout = null;
// if (border != null && !border.isDisposed()) {
// border.dispose();
// }
// border = null;
}
private void updateLabels() {
Object value = source.getPropertyValue(descriptor.getId());
if (nameLayout != null && !nameLayout.isDisposed()) {
nameLayout.setText(descriptor.getDisplayName());
nameLayout.setStyle(
new TextStyle(canvas.getFont(), canvas.getForeground(), null),
0,
nameLayout.getText().length());
}
ILabelDescriptor labelDescriptor = descriptor.getLabelDescriptor();
ImageDescriptor image = labelDescriptor == null ? null : labelDescriptor.getImage(value);
if (valueImage != null) {
valueImage.dispose();
}
valueImage = image == null ? null : image.createImage(false, Display.getCurrent());
ColorDescriptor color = labelDescriptor == null ? null : labelDescriptor.getForeground(value);
if (valueColor != null) {
valueColor.dispose();
}
valueColor = color == null ? null : color.createColor(Display.getCurrent());
FontDescriptor font = labelDescriptor == null ? null : labelDescriptor.getFont(value);
if (valueFont != null) {
valueFont.dispose();
}
valueFont = font == null ? null : font.createFont(Display.getCurrent());
if (valueLayout != null && !valueLayout.isDisposed()) {
String valueText =
labelDescriptor == null
? (value == null
? "" //$NON-NLS-1$
: value.toString())
: labelDescriptor.getText(value);
if (valueText == null) valueText = ""; // $NON-NLS-1$
valueLayout.setText(valueText);
valueLayout.setStyle(
new TextStyle(
valueFont == null ? canvas.getFont() : valueFont,
valueColor == null ? canvas.getForeground() : valueColor,
null),
0,
valueText.length());
}
canvas.layout(true);
canvas.redraw();
}
protected void finalize() throws Throwable {
System.out.println("layout finalized"); // $NON-NLS-1$
if (layout != null && !layout.isDisposed()) {
layout.dispose();
}
layout = null;
super.finalize();
}
/**
* Provides a TextLayout that can be used for Bidi purposes. This TextLayout should not be
* disposed by clients.
*
* @return an SWT TextLayout instance
*/
public synchronized TextLayout getTextLayout(int orientation) {
if (layout == null || layout.isDisposed()) layout = new TextLayout(Display.getDefault());
layout.setOrientation(orientation);
return layout;
}
private void paintCanvas(GC gc, int px, int py, int pw, int ph) {
if (canvas == null || canvas.isDisposed()) return;
Rectangle r = canvas.getBounds();
Color b1 = canvas.getBackground();
gc.setAntialias(SWT.ON);
gc.setTextAntialias(SWT.ON);
// Draw selection background:
if (isSelected()) {
gc.setBackground(selectedBackground);
gc.fillRoundRectangle(0, 0, r.width, r.height, CORNER, CORNER);
} else if (showingHover) {
int oldAlpha = gc.getAlpha();
gc.setAlpha(96 * oldAlpha / 255);
gc.setBackground(selectedBackground);
gc.fillRoundRectangle(0, 0, r.width, r.height, CORNER, CORNER);
gc.setAlpha(oldAlpha);
}
// Draw edit indicator:
if (showingEditorHover) {
int oldAlpha = gc.getAlpha();
gc.setAlpha(192 * oldAlpha / 255);
gc.setBackground(b1);
gc.fillRoundRectangle(
r.width / 2 + HOVER_SHRINK_H,
HOVER_SHRINK_V,
r.width / 2 - HOVER_SHRINK_H - HOVER_SHRINK_H,
r.height - HOVER_SHRINK_V - HOVER_SHRINK_V,
HOVER_CORNER,
HOVER_CORNER);
gc.setAlpha(oldAlpha);
//
// Control ec = editor == null ? null : editor.getControl();
// if (ec != null && !ec.isDisposed()) {
// Rectangle eb = ec.getBounds();
// gc.setAlpha(192);
// gc.setBackground(b1);
// gc.fillRoundRectangle(eb.x, eb.y, eb.width, eb.height, 8, 8);
// gc.setAlpha(255);
// }
}
// Draw property name label:
gc.setForeground(canvas.getForeground());
gc.setFont(canvas.getFont());
if (nameLayout != null && !nameLayout.isDisposed()) {
Rectangle nb = nameLayout.getBounds();
nameLayout.draw(gc, MARGIN_H, (r.height - nb.height) / 2);
}
// Draw property value repsentating image:
int right = r.width - MARGIN_H;
if (valueImage != null && !valueImage.isDisposed()) {
Rectangle ib = valueImage.getBounds();
int iw, ih;
if (ib.height > r.height) {
ih = r.height;
iw = ib.width * r.height / ib.height;
} else {
ih = ib.height;
iw = ib.width;
}
gc.drawImage(valueImage, 0, 0, ib.width, ib.height, right - iw, (r.height - ih) / 2, iw, ih);
right = right - iw - 3;
}
// Draw property value label:
if (valueLayout != null && !valueLayout.isDisposed()) {
Rectangle vb = valueLayout.getBounds();
valueLayout.draw(gc, right - vb.width, (r.height - vb.height) / 2);
}
}
