GMF的保存图片代码
GMF有提供保存图片的功能，但有时我们想自己在其他地方添加菜单，然后调用GMF的保存图片的代码，实现保存图片的功能。可这样做：
CopyToImageDialog dialog = new CopyToImageDialog(Display.getCurrent().getActiveShell(), path, fileName);
if (dialog.open() == CopyToImageDialog.CANCEL) {
return;
}
if (!overwriteExisting()) {
return;
}
Trace.trace(DiagramUIRenderPlugin.getInstance(),
"Copy Diagram to " + dialog.getDestination().toOSString() + " as " + dialog.getImageFormat().toString());
final MultiStatus status = new MultiStatus(DiagramUIRenderPlugin
.getPluginId(), DiagramUIRenderStatusCodes.OK, DiagramUIRenderMessages.CopyToImageAction_Label, null);
IRunnableWithProgress runnable = createRunnable(status);
ProgressMonitorDialog progressMonitorDialog = new ProgressMonitorDialog(Display.getCurrent().getActiveShell());
try {
progressMonitorDialog.run(false, true, runnable);
} catch (InvocationTargetException e) {
Log.warning(DiagramUIRenderPlugin.getInstance(),
DiagramUIRenderStatusCodes.IGNORED_EXCEPTION_WARNING, e.getTargetException().getMessage(),
e.getTargetException());
if (e.getTargetException() instanceof OutOfMemoryError) {
if (dialog.exportToHTML()) {
openErrorDialog(DiagramUIRenderMessages.CopyToImageAction_outOfMemoryMessage);
} else {
if (new MessageDialog(dialog.getShell(),
DiagramUIRenderMessages.CopyToImageOutOfMemoryDialog_title, null,
DiagramUIRenderMessages.CopyToImageOutOfMemoryDialog_message,
MessageDialog.ERROR, new String[] { IDialogConstants.YES_LABEL, IDialogConstants.NO_LABEL },
0).open() == 0) {
runCopyToImageUI(dialog);
}
}
} else if (e.getTargetException() instanceof SWTError) {
/**
* SWT returns an out of handles error when processing large
* diagrams
*/
if (dialog.exportToHTML()) {
openErrorDialog(DiagramUIRenderMessages.CopyToImageAction_outOfMemoryMessage);
} else {
if (new MessageDialog(dialog.getShell(),
DiagramUIRenderMessages.CopyToImageOutOfMemoryDialog_title, null,
DiagramUIRenderMessages.CopyToImageOutOfMemoryDialog_message,
MessageDialog.ERROR,
new String[] { IDialogConstants.YES_LABEL, IDialogConstants.NO_LABEL }, 0)
.open() == 0) {
runCopyToImageUI(dialog);
}
}
} else {
openErrorDialog(e.getTargetException().getMessage());
}
return;
} catch (InterruptedException e) {
/* the user pressed cancel */
Log.warning(DiagramUIRenderPlugin.getInstance(),
DiagramUIRenderStatusCodes.IGNORED_EXCEPTION_WARNING, e.getMessage(), e);
}
if (!status.isOK()) {
openErrorDialog(status.getChildren()[0].getMessage());
}
当然，可以这么简化：
CopyToImageUtil copyToImageUtil = new CopyToImageUtil();
ImageFileFormat imageFormat =ImageFileFormat.resolveImageFormat(3); //0表示png，1表示....
FileDialog fileDialog = new FileDialog(shell, SWT.SAVE);
...
String filePath = dialog.open();
IPath ipath = new Path(filePath);
copyToImageUtil.copyToImage((DiagramEditPart) diagramEditPart, ipath, imageFormat,new NullProgressMonitor());
