/**
* Creates rulers for the given graphical viewer.
*
* <p>The primaryViewer or its Control cannot be <code>null</code>. The primaryViewer's Control
* should be a FigureCanvas and a child of this Composite. This method should only be invoked
* once.
*
* <p>To create ruler(s), simply add the RulerProvider(s) (with the right key:
* RulerProvider.PROPERTY_HORIZONTAL_RULER or RulerProvider.PROPERTY_VERTICAL_RULER) as a property
* on the given viewer. It can be done after this method is invoked.
* RulerProvider.PROPERTY_RULER_VISIBILITY can be used to show/hide the rulers.
*
* @param primaryViewer The graphical viewer for which the rulers have to be created
*/
public void setGraphicalViewer(ScrollingGraphicalViewer primaryViewer) {
// pre-conditions
Assert.isNotNull(primaryViewer);
Assert.isNotNull(primaryViewer.getControl());
Assert.isTrue(diagramViewer == null);
diagramViewer = primaryViewer;
editor = (FigureCanvas) diagramViewer.getControl();
// layout whenever the scrollbars are shown or hidden, and whenever the RulerComposite
// is resized
layoutListener =
new Listener() {
public void handleEvent(Event event) {
// @TODO:Pratik If you use Display.asyncExec(runnable) here, some flashing
// occurs. You can see it when the palette is in the editor, and you hit
// the button to show/hide it.
layout(true);
}
};
addListener(SWT.Resize, layoutListener);
editor.getHorizontalBar().addListener(SWT.Show, layoutListener);
editor.getHorizontalBar().addListener(SWT.Hide, layoutListener);
editor.getVerticalBar().addListener(SWT.Show, layoutListener);
editor.getVerticalBar().addListener(SWT.Hide, layoutListener);
propertyListener =
new PropertyChangeListener() {
public void propertyChange(PropertyChangeEvent evt) {
String property = evt.getPropertyName();
if (RulerProvider.PROPERTY_HORIZONTAL_RULER.equals(property)) {
setRuler(
(RulerProvider)
diagramViewer.getProperty(RulerProvider.PROPERTY_HORIZONTAL_RULER),
PositionConstants.NORTH);
} else if (RulerProvider.PROPERTY_VERTICAL_RULER.equals(property)) {
setRuler(
(RulerProvider) diagramViewer.getProperty(RulerProvider.PROPERTY_VERTICAL_RULER),
PositionConstants.WEST);
} else if (RulerProvider.PROPERTY_RULER_VISIBILITY.equals(property))
setRulerVisibility(
((Boolean) diagramViewer.getProperty(RulerProvider.PROPERTY_RULER_VISIBILITY))
.booleanValue());
}
};
diagramViewer.addPropertyChangeListener(propertyListener);
Boolean rulerVisibility =
(Boolean) diagramViewer.getProperty(RulerProvider.PROPERTY_RULER_VISIBILITY);
if (rulerVisibility != null) setRulerVisibility(rulerVisibility.booleanValue());
setRuler(
(RulerProvider) diagramViewer.getProperty(RulerProvider.PROPERTY_HORIZONTAL_RULER),
PositionConstants.NORTH);
setRuler(
(RulerProvider) diagramViewer.getProperty(RulerProvider.PROPERTY_VERTICAL_RULER),
PositionConstants.WEST);
}
private GraphicalViewer createRulerContainer(int orientation) {
ScrollingGraphicalViewer viewer = new RulerViewer();
final boolean isHorizontal =
orientation == PositionConstants.NORTH || orientation == PositionConstants.SOUTH;
// Finish initializing the viewer
viewer.setRootEditPart(new RulerRootEditPart(isHorizontal));
viewer.setEditPartFactory(new RulerEditPartFactory(diagramViewer));
viewer.createControl(this);
((GraphicalEditPart) viewer.getRootEditPart())
.getFigure()
.setBorder(new RulerBorder(isHorizontal));
viewer.setProperty(GraphicalViewer.class.toString(), diagramViewer);
// Configure the viewer's control
FigureCanvas canvas = (FigureCanvas) viewer.getControl();
canvas.setScrollBarVisibility(FigureCanvas.NEVER);
if (font == null) {
FontData[] data = canvas.getFont().getFontData();
for (int i = 0; i < data.length; i++) {
data[i].setHeight(data[i].getHeight() - 1);
}
font = new Font(Display.getCurrent(), data);
}
canvas.setFont(font);
if (isHorizontal) {
canvas.getViewport().setHorizontalRangeModel(editor.getViewport().getHorizontalRangeModel());
} else {
canvas.getViewport().setVerticalRangeModel(editor.getViewport().getVerticalRangeModel());
}
// Add the viewer to the rulerEditDomain
if (rulerEditDomain == null) {
rulerEditDomain = new EditDomain();
rulerEditDomain.setCommandStack(diagramViewer.getEditDomain().getCommandStack());
}
rulerEditDomain.addViewer(viewer);
return viewer;
}
/**
* @see
* com.architexa.org.eclipse.gef.EditPartViewer#setContents(com.architexa.org.eclipse.gef.EditPart)
*/
public void setContents(EditPart editpart) {
super.setContents(editpart);
setFocus(getContents());
}
/**
* Requests to reveal a ruler are ignored since that causes undesired scrolling to the origin of
* the ruler
*
* @see
* com.architexa.org.eclipse.gef.EditPartViewer#reveal(com.architexa.org.eclipse.gef.EditPart)
*/
public void reveal(EditPart part) {
if (part != getContents()) super.reveal(part);
}
/**
* @see
* com.architexa.org.eclipse.gef.EditPartViewer#appendSelection(com.architexa.org.eclipse.gef.EditPart)
*/
public void appendSelection(EditPart editpart) {
if (editpart instanceof RootEditPart) editpart = ((RootEditPart) editpart).getContents();
setFocus(editpart);
super.appendSelection(editpart);
}