/**
* Called on the viewer disposal. Unregisters from the compare configuration. Clients may extend
* if they have to do additional cleanup.
*
* @see org.eclipse.jface.viewers.ContentViewer#handleDispose(org.eclipse.swt.events.DisposeEvent)
*/
protected void handleDispose(DisposeEvent event) {
if (fHandlerService != null) fHandlerService.dispose();
Object input = getInput();
if (input instanceof ICompareInput) {
ICompareContainer container = getCompareConfiguration().getContainer();
container.removeCompareInputChangeListener(
(ICompareInput) input, fCompareInputChangeListener);
}
if (input != null) {
ICompareInputLabelProvider lp = getCompareConfiguration().getLabelProvider();
if (lp != null) lp.removeListener(labelChangeListener);
}
if (fPropertyChangeListener != null) {
fCompareConfiguration.removePropertyChangeListener(fPropertyChangeListener);
fPropertyChangeListener = null;
}
fAncestorLabel = null;
fLeftLabel = null;
fDirectionLabel = null;
fRightLabel = null;
fCenter = null;
if (fRightArrow != null) {
fRightArrow.dispose();
fRightArrow = null;
}
if (fLeftArrow != null) {
fLeftArrow.dispose();
fLeftArrow = null;
}
if (fBothArrow != null) {
fBothArrow.dispose();
fBothArrow = null;
}
if (fNormalCursor != null) {
fNormalCursor.dispose();
fNormalCursor = null;
}
if (fHSashCursor != null) {
fHSashCursor.dispose();
fHSashCursor = null;
}
if (fVSashCursor != null) {
fVSashCursor.dispose();
fVSashCursor = null;
}
if (fHVSashCursor != null) {
fHVSashCursor.dispose();
fHVSashCursor = null;
}
super.handleDispose(event);
}
private void updateItem(Item item) {
if (!item.isDisposed()) { // defensive code
ILabelProvider lprovider = (ILabelProvider) fContentViewer.getLabelProvider();
Object data = item.getData();
String oldText = item.getText();
String text = lprovider.getText(data);
if (text != null && !text.equals(oldText)) {
item.setText(text);
}
Image oldImage = item.getImage();
Image image = lprovider.getImage(data);
if (image != null && !image.equals(oldImage)) {
item.setImage(image);
}
}
}
/**
* The <code>ContentMergeViewer</code> implementation of this <code>ContentViewer</code> method
* checks to ensure that the content provider is an <code>IMergeViewerContentProvider</code>.
*
* @param contentProvider the content provider to set. Must implement IMergeViewerContentProvider.
*/
public void setContentProvider(IContentProvider contentProvider) {
Assert.isTrue(contentProvider instanceof IMergeViewerContentProvider);
super.setContentProvider(contentProvider);
}
protected void hookControl(final Control control) {
super.hookControl(control);
if (control instanceof Scale) {
Listener listener =
new Listener() {
private boolean mouseDown = false;
private boolean mouseDrag = false;
private boolean selectionChangedDuringDragging = false;
public void handleEvent(Event event) {
switch (event.type) {
case SWT.Selection:
boolean selectionChanged = handleScaleSelection((Scale) event.widget);
if (selectionChanged
&& !selectionChangedDuringDragging
&& (mouseDrag || mouseDown)) {
selectionChangedDuringDragging = true;
}
if (!selectionChangedDuringDragging) {
firePostSelectionChanged();
}
break;
case SWT.MouseDoubleClick:
mouseDown = false;
mouseDrag = false;
selectionChangedDuringDragging = false;
fireOpen(new OpenEvent(SliderViewer.this, getSelection()));
break;
case SWT.MouseDown:
mouseDown = true;
mouseDrag = false;
selectionChangedDuringDragging = false;
break;
case SWT.MouseMove:
if (!mouseDrag && mouseDown) {
mouseDrag = true;
}
break;
case SWT.MouseUp:
boolean postSelected = selectionChangedDuringDragging;
mouseDown = false;
mouseDrag = false;
selectionChangedDuringDragging = false;
if (postSelected) {
firePostSelectionChanged();
}
}
}
};
control.addListener(SWT.Selection, listener);
control.addListener(SWT.MouseDoubleClick, listener);
control.addListener(SWT.MouseDown, listener);
control.addListener(SWT.MouseMove, listener);
control.addListener(SWT.MouseUp, listener);
return;
} else if (control instanceof FigureCanvas) {
Listener listener =
new Listener() {
private boolean mouseDown = false;
private boolean mouseDrag = false;
private boolean selectionChangedDuringDragging = false;
public void handleEvent(Event event) {
switch (event.type) {
case SWT.Resize:
handleResize();
break;
case SWT.MouseMove:
if (!mouseDrag && mouseDown) {
mouseDrag = true;
}
if (mouseDrag && (event.stateMask & SWT.BUTTON1) != 0) {
if (handleCanvasSelection(event.x, event.y)) {
selectionChangedDuringDragging = true;
}
}
break;
case SWT.MouseDown:
if (receives(event.x, event.y)) {
mouseDown = true;
mouseDrag = false;
if (event.button == 1) {
if (handleCanvasSelection(event.x, event.y)) {
selectionChangedDuringDragging = true;
}
}
}
break;
case SWT.MouseUp:
boolean postSelected = selectionChangedDuringDragging;
mouseDown = false;
mouseDrag = false;
selectionChangedDuringDragging = false;
if (postSelected) {
firePostSelectionChanged();
}
break;
case SWT.MouseDoubleClick:
mouseDown = false;
mouseDrag = false;
fireOpen(new OpenEvent(SliderViewer.this, getSelection()));
break;
}
}
};
control.addListener(SWT.MouseMove, listener);
control.addListener(SWT.MouseDown, listener);
control.addListener(SWT.MouseUp, listener);
control.addListener(SWT.Resize, listener);
control.addListener(SWT.MouseDoubleClick, listener);
}
}
/** 刷新数据列表。 */
public void refresh() {
for (ContentViewer viewer : dataTreeViewers) {
viewer.refresh();
}
}