/**
* Adds a listener for help requests in this viewer. Has no effect if an identical listener is
* already registered.
*
* @param listener a help listener
*/
public void addHelpListener(HelpListener listener) {
helpListeners.add(listener);
if (!helpHooked) {
Control control = getControl();
if (control != null && !control.isDisposed()) {
if (this.helpListener == null) {
this.helpListener =
new HelpListener() {
public void helpRequested(HelpEvent event) {
handleHelpRequest(event);
}
};
}
control.addHelpListener(this.helpListener);
helpHooked = true;
}
}
}
public void activateHoverHelp(final org.eclipse.swt.widgets.Control control) {
control.addMouseListener(
new org.eclipse.swt.events.MouseAdapter() {
public void mouseDown(org.eclipse.swt.events.MouseEvent e) {
if (tipShell.isVisible()) {
tipShell.setVisible(false);
}
}
});
control.addMouseTrackListener(
new org.eclipse.swt.events.MouseTrackAdapter() {
public void mouseExit(org.eclipse.swt.events.MouseEvent e) {
if (tipShell.isVisible()) {
tipShell.setVisible(false);
}
tipWidget = null;
}
public void mouseHover(org.eclipse.swt.events.MouseEvent event) {
org.eclipse.swt.graphics.Point pt =
new org.eclipse.swt.graphics.Point(event.x, event.y);
org.eclipse.swt.widgets.Widget widget = event.widget;
if (widget instanceof org.eclipse.swt.widgets.ToolBar) {
org.eclipse.swt.widgets.ToolBar w = (org.eclipse.swt.widgets.ToolBar) widget;
widget = w.getItem(pt);
}
if (widget instanceof org.eclipse.swt.widgets.Table) {
org.eclipse.swt.widgets.Table w = (org.eclipse.swt.widgets.Table) widget;
widget = w.getItem(pt);
}
if (widget instanceof org.eclipse.swt.widgets.Tree) {
org.eclipse.swt.widgets.Tree w = (org.eclipse.swt.widgets.Tree) widget;
widget = w.getItem(pt);
}
if (widget == null) {
tipShell.setVisible(false);
tipWidget = null;
return;
}
if (widget == tipWidget) {
return;
}
tipWidget = widget;
tipPosition = control.toDisplay(pt);
java.lang.String text = (java.lang.String) widget.getData("TIP_TEXT");
org.eclipse.swt.graphics.Image image =
(org.eclipse.swt.graphics.Image) widget.getData("TIP_IMAGE");
tipLabelText.setText(text != null ? text : "");
tipLabelImage.setImage(image);
tipShell.pack();
setHoverLocation(tipShell, tipPosition);
tipShell.setVisible(true);
}
});
control.addHelpListener(
new org.eclipse.swt.events.HelpListener() {
public void helpRequested(org.eclipse.swt.events.HelpEvent event) {
if (tipWidget == null) {
return;
}
org.eclipse.swt.examples.hoverhelp.HoverHelp.ToolTipHelpTextHandler handler =
(org.eclipse.swt.examples.hoverhelp.HoverHelp.ToolTipHelpTextHandler)
tipWidget.getData("TIP_HELPTEXTHANDLER");
if (handler == null) {
return;
}
java.lang.String text = handler.getHelpText(tipWidget);
if (text == null) {
return;
}
if (tipShell.isVisible()) {
tipShell.setVisible(false);
org.eclipse.swt.widgets.Shell helpShell =
new org.eclipse.swt.widgets.Shell(parentShell, SWT.SHELL_TRIM);
helpShell.setLayout(new org.eclipse.swt.layout.FillLayout());
org.eclipse.swt.widgets.Label label =
new org.eclipse.swt.widgets.Label(helpShell, SWT.NONE);
label.setText(text);
helpShell.pack();
setHoverLocation(helpShell, tipPosition);
helpShell.open();
}
}
});
}