| SWT PaintListener question [message #251182] |
Tue, 11 March 2008 03:18  |
Eclipse User |
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Originally posted by: todd_hsieh.yahoo.com
Hi
Please help. I create a CTabFolder when start the program. Then user can
launch a File browser to select a file. When file is selected, I tried to
create an CTabItem that draws something. The result is that I can see the
tab has been created but nothing was draw. However, if I click on the tab,
it draws. Or it can be draw if creating tab right after creating
CTabFolder. The PaintListener seems not called successfully. How to make
it draw whenever the tab is created?
/*
* Called in main
*/
public TabControl(Display display, Shell shell) {
this.shell = shell;
this.display = display;
folder = new CTabFolder(shell, SWT.BORDER);
folder.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false));
folder.setSimple(false);
folder.setUnselectedCloseVisible(true);
}
/*
* Called from StartProcess()
*/
public void CreateTab() {
CTabItem item = new CTabItem(folder, SWT.CLOSE);
item.setText("SequenceDiagram ");
Composite comp = new Composite(folder, SWT.NONE);
comp.setLayout(new FillLayout());
item.setControl(comp);
drawingCanvas = new Canvas(comp, SWT.BORDER);
drawingCanvas.addPaintListener(new SDPaintListener());
drawingCanvas.setBackground(display.getSystemColor(SWT.COLOR _WHITE));
drawingCanvas.setFocus();
drawingCanvas.redraw();
folder.addCTabFolder2Listener(new CTabFolder2Adapter() {
public void close(CTabFolderEvent event) {
}
});
}
private class SDPaintListener implements PaintListener {
public void paintControl(PaintEvent e) {
DrawInfo drawInfo = null;
drawInfo = new DrawInfo("DUM",
firstEntity_x, firstEntity_y);
drawEntity(e.gc, e.display, drawInfo); }
/*
* called when file is selected
*/
public void StartProcess(String fileName) {
...
CreateTab();
}
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| Re: SWT PaintListener question [message #251186 is a reply to message #251182] |
Tue, 11 March 2008 04:02  |
 Matthew Hall
Messages: 368
Registered: July 2009 |
Senior Member |
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After you've created the tab and its associated control, call:
folder.setSelection(item);
Matthew
Todd wrote:
> Hi
> Please help. I create a CTabFolder when start the program. Then user can
> launch a File browser to select a file. When file is selected, I tried
> to create an CTabItem that draws something. The result is that I can see
> the tab has been created but nothing was draw. However, if I click on
> the tab, it draws. Or it can be draw if creating tab right after
> creating CTabFolder. The PaintListener seems not called successfully.
> How to make it draw whenever the tab is created?
> /*
> * Called in main
> */
> public TabControl(Display display, Shell shell) {
> this.shell = shell;
> this.display = display;
> folder = new CTabFolder(shell, SWT.BORDER);
> folder.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true,
> false));
> folder.setSimple(false);
> folder.setUnselectedCloseVisible(true);
> }
>
>
> /*
> * Called from StartProcess()
> */
> public void CreateTab() {
> CTabItem item = new CTabItem(folder, SWT.CLOSE);
> item.setText("SequenceDiagram ");
> Composite comp = new Composite(folder, SWT.NONE);
> comp.setLayout(new FillLayout());
> item.setControl(comp);
>
> drawingCanvas = new Canvas(comp, SWT.BORDER);
> drawingCanvas.addPaintListener(new SDPaintListener());
>
> drawingCanvas.setBackground(display.getSystemColor(SWT.COLOR _WHITE));
> drawingCanvas.setFocus();
> drawingCanvas.redraw();
> folder.addCTabFolder2Listener(new CTabFolder2Adapter() {
> public void close(CTabFolderEvent event) {
> }
> });
> }
>
>
> private class SDPaintListener implements PaintListener {
> public void paintControl(PaintEvent e) {
>
> DrawInfo drawInfo = null;
> drawInfo = new DrawInfo("DUM",
> firstEntity_x, firstEntity_y);
> drawEntity(e.gc, e.display, drawInfo); }
>
>
>
> /*
> * called when file is selected
> */
> public void StartProcess(String fileName) {
> ...
> CreateTab();
> }
>
>
>
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