Java Code Examples for org.eclipse.swt.widgets.Control#isDisposed()

protected final void executeRunnables(final Collection<Runnable> runnables) {

		// now post all collected runnables
		Control ctrl= fViewer.getControl();
		if (ctrl != null && !ctrl.isDisposed()) {
			final boolean hasPendingUpdates;
			synchronized (this) {
				hasPendingUpdates= fPendingUpdates != null && !fPendingUpdates.isEmpty();
			}
			//Are we in the UIThread? If so spin it until we are done
			if (!hasPendingUpdates && ctrl.getDisplay().getThread() == Thread.currentThread() && !fViewer.isBusy()) {
				runUpdates(runnables);
			} else {
				synchronized (this) {
					if (fPendingUpdates == null) {
						fPendingUpdates= runnables;
					} else {
						fPendingUpdates.addAll(runnables);
					}
				}
				postAsyncUpdate(ctrl.getDisplay());
			}
		}
	}
 

public void updateQuery( Control control )
{
	if ( textCollection.containsKey( control ) )
	{
		IQueryExpressionManager queryManager = textCollection.get( control );
		queryManager.updateQuery( ChartUIUtil.getText( control ) );

		adjustScaleData( queryManager.getQuery( ) );

		// control may be disposed when updating query
		if ( control.isDisposed( ) )
		{
			control = findText( queryManager.getQuery( ) );
		}

		// Bind color to this data definition
		if ( control != null )
		{
			updateControlBackground( control, queryManager.getQuery( )
					.getDefinition( ) );
		}
	}
}
 

public void resourceChanged(IResourceChangeEvent event) {
	if (fViewer.getInput() == null) {
		return;
	}
	IResourceDelta delta= event.getDelta();
	if (delta == null)
		return;
	IResourceDelta[] projDeltas = delta.getAffectedChildren(IResourceDelta.CHANGED);
	for (int i= 0; i < projDeltas.length; i++) {
		IResourceDelta pDelta= projDeltas[i];
		if ((pDelta.getFlags() & IResourceDelta.DESCRIPTION) != 0) {
			IProject project= (IProject) pDelta.getResource();
			if (needsRefiltering(project)) {
				final Control ctrl= fViewer.getControl();
				if (ctrl != null && !ctrl.isDisposed()) {
					// async is needed due to bug 33783
					ctrl.getDisplay().asyncExec(new Runnable() {
						public void run() {
							if (!ctrl.isDisposed())
								fViewer.refresh(false);
						}
					});
				}
				return; // one refresh is good enough
			}
		}
	}
}
 

public void setInput(Object input) {
    final Control control = getControl();
    if (control == null || control.isDisposed()) {
        throw new IllegalStateException(
                "Need an underlying widget to be able to set the input." + //$NON-NLS-1$
                        "(Has the widget been disposed?)"); //$NON-NLS-1$
    }
    this.input = input;
    if (input instanceof IObservableList) {
        final IObservableList observableList = (IObservableList) input;
        observableList.removeListChangeListener(operationListlistener);
        observableList.addListChangeListener(operationListlistener);
    }

}
 

public static Boolean setEnabled(Control control, boolean isEnabled) {
	if (control.isDisposed())
		return null;

	boolean isEnabledBefore = control.getEnabled();
	if (isEnabledBefore != isEnabled) {
		control.setEnabled(isEnabled);
	}
	return isEnabledBefore;
}
 

/**
 * Process the resource delta.
 *
 * @param delta
 */
protected void processDelta(IResourceDelta delta) {
    Control ctrl = viewer.getControl();
    if (ctrl == null || ctrl.isDisposed()) {
        return;
    }

    final Collection<Runnable> runnables = new ArrayList<Runnable>();
    processDelta(delta, runnables);
    processRunnables(runnables);
}
 

private void updateViewer(){
	Control control = viewer.getControl();
	if (control != null && !control.isDisposed()) {
		control.getDisplay().asyncExec(new Runnable() {
			@Override
			public void run(){
				if (!control.isDisposed() && control.isVisible()) {
					viewer.refresh(item, true);
				}
			}
		});
	}
}
 

/**
 * Enable or disable the widget, depending on the associated enabler
 */
public boolean enableOrDisable() {
	if (this.enabler == null) {
		return true;
	}

	final boolean enabled = this.enabler.isEnabled();
	for (final Control c : this.controls) {
		if (!c.isDisposed()) {
			c.setEnabled(enabled);
		}
	}
	return enabled;
}
 

/**
 * 销毁除了“过滤器列表控件”之外的其它控件
 */
private void disposeChild() {
	for (Control ctl : this.getChildren()) {
		if (!"filterName".equals(ctl.getData()) && ctl != null && !ctl.isDisposed()) {
			ctl.dispose();
		}
	}
}
 

/**
 * Dispose this viewer SWT control ;
 */
public void dispose() {
	Control control = getControl();
	if (control != null && !control.isDisposed()) {
		control.dispose();
	}
}
 

private static void createDropTarget(Composite composite,
		DropTargetListener dropTargetListener) {

	Transfer[] transferList = new Transfer[] {
		FixedHTMLTransfer.getInstance(),
		FixedURLTransfer.getInstance(),
		FileTransfer.getInstance(),
		TextTransfer.getInstance()
	};

	final DropTarget dropTarget = new DropTarget(composite, DND.DROP_DEFAULT
			| DND.DROP_MOVE | DND.DROP_COPY | DND.DROP_LINK | DND.DROP_TARGET_MOVE);
	dropTarget.setTransfer(transferList);
	dropTarget.addDropListener(dropTargetListener);
	// Note: DropTarget will dipose when the parent it's on diposes

	// On Windows, dropping on children moves up to parent
	// On OSX, each child needs it's own drop.
	if (Constants.isWindows) {
		return;
	}

	Control[] children = composite.getChildren();
	for (Control control : children) {
		if (control.isDisposed()) {
			continue;
		}
		if (control instanceof Composite) {
			createDropTarget((Composite) control, dropTargetListener);
		} else {
			DropTarget dropTarget2 = new DropTarget(control,
					DND.DROP_DEFAULT | DND.DROP_MOVE | DND.DROP_COPY | DND.DROP_LINK
							| DND.DROP_TARGET_MOVE);
			dropTarget2.setTransfer(transferList);
			dropTarget2.addDropListener(dropTargetListener);
		}
	}
}
 

/**
 * Callback for the show legend action
 */
public void showLegend() {
    Control tgControl = getControl();
    if (tgControl == null || tgControl.isDisposed()) {
        return;
    }
    ITimeGraphLegendProvider legendProvider = fLegendProvider;
    if (legendProvider == null) {
        TimeGraphLegend.open(tgControl.getShell(), getTimeGraphProvider());
    } else {
        legendProvider.showLegend(tgControl.getShell(), getTimeGraphProvider());
    }
}
 

/**
 * 销毁除了“过滤器列表控件”之外的其它控件
 */
private void disposeChild() {
	for (Control ctl : this.getChildren()) {
		if (!"filterName".equals(ctl.getData()) && ctl != null && !ctl.isDisposed()) {
			ctl.dispose();
		}
	}
}
 

private void updateViewer(){
	if (viewer != null) {
		Control control = viewer.getControl();
		if (control != null && !control.isDisposed()) {
			viewer.getControl().getDisplay().asyncExec(new Runnable() {
				@Override
				public void run(){
					if (!control.isDisposed() && control.isVisible()) {
						viewer.update(item, null);
					}
				}
			});
		}
	}
}
 

protected boolean isDisposed( )
{
	Control ctrl = getControl( );
	return ( ctrl == null || ctrl.isDisposed( ) );
}
 

/**
 * Completes the common prefix of all proposals directly in the code. If no common prefix can be found, the proposal
 * popup is shown.
 * 
 * @return an error message if completion failed.
 * @since 3.0
 */
public String incrementalComplete()
{
	if (Helper.okToUse(fProposalShell) && fFilteredProposals != null)
	{
		completeCommonPrefix();
	}
	else
	{
		final Control control = fContentAssistSubjectControlAdapter.getControl();

		if (fKeyListener == null)
		{
			fKeyListener = new ProposalSelectionListener();
		}

		if (!Helper.okToUse(fProposalShell) && !control.isDisposed())
		{
			fContentAssistSubjectControlAdapter.addKeyListener(fKeyListener);
		}

		BusyIndicator.showWhile(control.getDisplay(), new Runnable()
		{
			public void run()
			{
				fInvocationOffset = fContentAssistSubjectControlAdapter.getSelectedRange().x;
				fFilterOffset = fInvocationOffset;
				fFilteredProposals = computeProposals(fInvocationOffset, false);

				int count = (fFilteredProposals == null) ? 0: fFilteredProposals.length;
				if (count == 0)
				{
					// IM turned off for the moment, as it's annoying more than helpful to beep.
					// control.getDisplay().beep();
					hide();
				}
				else if ((count == 1)&& (canAutoInsert(fFilteredProposals[0])))
				{
					insertProposal(fFilteredProposals[0],'\0', 0, fInvocationOffset);
				}
				else if (completeCommonPrefix())
				{
					hide();
				}
				else
				{
					fComputedProposals = fFilteredProposals;
					createPopup(fComputedProposals);
				}
			}
		});
	}

	return getErrorMessage();
}
 

private boolean isDisposed()
{
	Control control = getControl();
	return control == null || control.isDisposed();
}
 

public static void
 addCopyToClipMenu(
final Control				control,
final copyToClipProvider	provider )
 {
  MouseAdapter ml = (MouseAdapter)control.getData( MOUSE_LISTENER_KEY );
  
  if ( ml != null ){
  
	  control.removeMouseListener( ml );
  }
  
  ml =
	  new MouseAdapter()
	  {
		  @Override
		  public void
		  mouseDown(
			 MouseEvent e )
		  {
			  if ( control.isDisposed()){

				  return;
			  }

			  final String	text = provider.getText();

			  if ( control.getMenu() != null || text == null || text.length() == 0 ){

				  return;
			  }

			  if (!(e.button == 3 || (e.button == 1 && e.stateMask == SWT.CONTROL))){

				  return;
			  }

			  final Menu menu = new Menu(control.getShell(),SWT.POP_UP);

			  MenuItem   item = new MenuItem( menu,SWT.NONE );

			  item.setData( MENU_ITEM_KEY, "" );

			  String	msg_text_id;

			  if ( provider instanceof copyToClipProvider2 ){

				  msg_text_id = ((copyToClipProvider2)provider).getMenuResource();

			  }else{

				  msg_text_id = "label.copy.to.clipboard";
			  }

			  item.setText( MessageText.getString( msg_text_id ));

			  item.addSelectionListener(
					  new SelectionAdapter()
					  {
						  @Override
						  public void
						  widgetSelected(
								  SelectionEvent arg0)
						  {
							  new Clipboard(control.getDisplay()).setContents(new Object[] {text}, new Transfer[] {TextTransfer.getInstance()});
						  }
					  });

			  control.setMenu( menu );

			  menu.addMenuListener(
					  new MenuAdapter()
					  {
						  @Override
						  public void
						  menuHidden(
								  MenuEvent arg0 )
						  {
							  if ( control.getMenu() == menu ){

								  control.setMenu( null );
							  }
						  }
					  });

			  menu.setVisible( true );
		  }
	  };
  
  control.setData( MOUSE_LISTENER_KEY, ml );
  
  control.addMouseListener( ml );
 }
 

/**
 * 编辑
 */
private void edit() {
	String[] filters = customFilterList.getSelection();
	if (filters.length > 0) {
		if (isChange()) {
			if (!MessageDialog.openConfirm(getShell(), "", Messages.getString("dialog.CustomFilterDialog.msg1"))) {
				return;
			}
		}
		String key = filters[0];
		filterNameTxt.setText(key);
		String link = XLFHandler.getCustomFilterAdditionMap().get(key);
		if (link.indexOf("and") != -1) {
			andBtn.setSelection(true);
			orBtn.setSelection(false);
		} else {
			andBtn.setSelection(false);
			orBtn.setSelection(true);
		}

		for (Control ctl : conditionList) {
			if (!ctl.isDisposed()) {
				ctl.dispose();
			}
		}
		conditionList.clear();
		ArrayList<String[]> tmpList = XLFHandler.getCustomFilterIndexMap().get(key);
		for (String[] tempIndex : tmpList) {
			String filterIndex = tempIndex[0];
			DynaComposite dyna = new DynaComposite(dynaComp, SWT.NONE);
			dyna.getFilterName().select(Integer.parseInt(filterIndex));
			dyna.getFilterName().notifyListeners(SWT.Selection, null);
			if ("0".equals(filterIndex) || "1".equals(filterIndex)) { // 关键字、批注
				dyna.getConditions().select(Integer.parseInt(tempIndex[1]));
				dyna.getValue().setText(tempIndex[2].replace("0x0020", " "));
				dyna.getValue().setForeground(black);
			} else if ("2".equals(filterIndex)) { // 属性
				dyna.getPropName().setText(tempIndex[1]);
				dyna.getPropValue().setText(tempIndex[2]);
				dyna.getPropName().setForeground(black);
				dyna.getPropValue().setForeground(black);
			}
		}
		scroll.setMinSize(dynaComp.computeSize(SWT.DEFAULT, SWT.DEFAULT));
		dynaComp.layout();
	} else {
		MessageDialog.openInformation(getShell(), "", Messages.getString("dialog.CustomFilterDialog.msg4"));
	}
}
 

/**
 * 编辑
 */
private void edit() {
	String[] filters = customFilterList.getSelection();
	if (filters.length > 0) {
		if (isChange()) {
			if (!MessageDialog.openConfirm(getShell(), "", "不保存当前内容吗？")) {
				return;
			}
		}
		String key = filters[0];
		filterNameTxt.setText(key);

		String[] tempArray = XLFHandler.getCustomMatchFilterAdditionMap().get(key).get(0);
		if (tempArray[0].indexOf("and") != -1) {
			andBtn.setSelection(true);
			orBtn.setSelection(false);
		} else {
			andBtn.setSelection(false);
			orBtn.setSelection(true);
		}
		int check = Integer.parseInt(tempArray[1]);

		if (btnIsTagged != null) {
			if ((check & btnIsTaggedCheck) != 0) {
				btnIsTagged.setSelection(true);
			} else {
				btnIsTagged.setSelection(false);
			}
		}

		if (btnQT != null) {
			if ((check & btnQTCheck) != 0) {
				btnQT.setSelection(true);
			} else {
				btnQT.setSelection(false);
			}
		}
		if (btnPT != null) {
			if ((check & btnPTCheck) != 0) {
				btnPT.setSelection(true);
			} else {
				btnPT.setSelection(false);
			}
		}
		if (btnIsRemoveFromSrc != null) {
			if ((check & btnIsRemoveFromSrcCheck) != 0) {
				btnIsRemoveFromSrc.setSelection(true);
			} else {
				btnIsRemoveFromSrc.setSelection(false);
			}
		}

		for (Control ctl : conditionList) {
			if (!ctl.isDisposed()) {
				ctl.dispose();
			}
		}
		conditionList.clear();
		ArrayList<String[]> tmpList = XLFHandler.getCustomMatchFilterIndexMap().get(key);
		for (String[] tempIndex : tmpList) {
			String filterIndex = tempIndex[0];
			DynaComposite dyna = new DynaComposite(dynaComp, SWT.NONE);
			dyna.getFilterName().select(Integer.parseInt(filterIndex));
			dyna.getFilterName().notifyListeners(SWT.Selection, null);
			if ("0".equals(filterIndex)) { // 匹配率
				dyna.getConditions().select(Integer.parseInt(tempIndex[1]));
				dyna.getValue().setText(tempIndex[2]);
			} else if ("1".equals(filterIndex)) { // 关键字
				dyna.getConditions().select(Integer.parseInt(tempIndex[1]));
				dyna.getValue().setText(tempIndex[2]);
			} else if ("2".equals(filterIndex)) { // 来源
				dyna.getValue().setText(tempIndex[1]);
			}
			dyna.getValue().setForeground(black);
		}
		scroll.setMinSize(dynaComp.computeSize(SWT.DEFAULT, SWT.DEFAULT));
		dynaComp.layout();
	} else {
		MessageDialog.openInformation(getShell(), "", "请选择一个自定义过滤器。");
	}
}