org.eclipse.swt.widgets.Shell#setData ( )源码实例Demo

private void configureContext(Shell shell) {
    final IEclipseContext e4Context = ((Workbench) PlatformUI.getWorkbench()).getContext();
    while (!Objects.equals(e4Context.getActiveLeaf(), e4Context)) {
        e4Context.getActiveLeaf().deactivate();
    }
    final IEclipseContext expressionDialogContext = e4Context.createChild("expressionDialogContext");
    expressionDialogContext.activate();
    shell.setData("org.eclipse.e4.ui.shellContext", expressionDialogContext);
}
 

/**
 * Constructs a new instance of this class given its parent.
 *
 * @param shell a shell that will be the parent of the new instance (cannot
 *            be null)
 * @exception IllegalArgumentException
 *                <ul>
 *                <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
 *                </ul>
 * @exception SWTException
 *                <ul>
 *                <li>ERROR_WIDGET_DISPOSED - if the parent has been
 *                disposed</li>
 *                <li>ERROR_THREAD_INVALID_ACCESS - if not called from the
 *                thread that created the parent</li>
 *                </ul>
 */
public DarkPanel(final Shell shell) {
	if (shell == null) {
		SWT.error(SWT.ERROR_NULL_ARGUMENT);
	}

	if (shell.isDisposed()) {
		SWT.error(SWT.ERROR_INVALID_ARGUMENT);
	}

	parent = shell;
	if (shell.getData(DARK_PANEL_KEY) != null) {
		throw new IllegalArgumentException("This shell has already an infinite panel attached on it !");
	}
	shell.setData(DARK_PANEL_KEY, this);
	alpha = 100;
}
 

/**
 * Constructs a new instance of this class given its parent.
 *
 * @param shell a shell that will be the parent of the new instance (cannot
 *            be null)
 * @exception IllegalArgumentException
 *                <ul>
 *                <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
 *                </ul>
 * @exception SWTException
 *                <ul>
 *                <li>ERROR_WIDGET_DISPOSED - if the parent has been
 *                disposed</li>
 *                <li>ERROR_THREAD_INVALID_ACCESS - if not called from the
 *                thread that created the parent</li>
 *                </ul>
 */
public BlurredPanel(final Shell shell) {
	if (shell == null) {
		SWT.error(SWT.ERROR_NULL_ARGUMENT);
	}

	if (shell.isDisposed()) {
		SWT.error(SWT.ERROR_INVALID_ARGUMENT);
	}

	parent = shell;
	if (shell.getData(BLURED_PANEL_KEY) != null) {
		throw new IllegalArgumentException("This shell has already an infinite panel attached on it !");
	}
	shell.setData(BLURED_PANEL_KEY, this);
	radius = 2;
}
 

@Override
protected void configureShell(final Shell shell) {
    super.configureShell(shell);
    shell.setData(SWTBOT_WIDGET_ID_KEY, SWTBOT_ID_EXPRESSIONVIEWER_PROPOSAL_SHELL);
}