/**
* Cancel the drag operation. The default implementation will return the dragElement to its
* original location in the model.
*/
public void cancelDrag() {
if (dragPH == null) return;
// if the dragElement is *not* directly after the placeholder we have to return it there
List<MUIElement> phParentsKids = dragPH.getParent().getChildren();
if (phParentsKids.indexOf(dragElement) != phParentsKids.indexOf(dragPH) + 1) {
dragElement.setToBeRendered(false);
if (dragElement.getParent() != null)
dragElement.getParent().getChildren().remove(dragElement);
phParentsKids.add(phParentsKids.indexOf(dragPH) + 1, dragElement);
dragElement.setVisible(true);
dragElement.setToBeRendered(true);
}
}
private void createElement(MUIElement element) {
if (modelService.isHostedElement(element, workbenchWindow)) {
// assume the client has full control
return;
}
MPlaceholder placeholder = element.getCurSharedRef();
if (placeholder != null) {
element.setToBeRendered(true);
element = placeholder;
}
// render this element
element.setToBeRendered(true);
// render all of its parents
MUIElement parentWindow = workbenchWindow;
// determine the top parent that needs to be forcibly created
MUIElement target = null;
MElementContainer<MUIElement> parent = element.getParent();
while (parent != null && parent != parentWindow) {
parent.setToBeRendered(true);
if (parent.getWidget() == null) {
target = parent;
}
parent = parent.getParent();
}
if (target != null) {
// force the element's parent hierarchy to be created
engine.createGui(target);
}
// ask the engine to create the element
if (element.getWidget() == null) engine.createGui(element);
parent = element.getParent();
if (parent != null && parent.getChildren().size() == 1) {
// if we're the only child, set ourselves as the selected element
parent.setSelectedElement(element);
}
}
private void showElementInWindow(MWindow window, MUIElement element) {
MUIElement parent = element.getParent();
if (parent == null) {
MPlaceholder ph = findPlaceholderFor(window, element);
if (ph != null) {
element = ph;
parent = element.getParent();
}
}
if (parent == null && element instanceof MWindow) {
// no parent but is a window, could be a detached window then
parent = (MUIElement) ((EObject) element).eContainer();
if (parent != null) {
// Force the element to be rendered
if (!element.isToBeRendered()) {
element.setToBeRendered(true);
}
if (window != parent) {
showElementInWindow(window, parent);
}
}
} else if (parent != null) {
// Force the element to be rendered
if (!element.isToBeRendered()) {
element.setToBeRendered(true);
}
@SuppressWarnings("unchecked")
MElementContainer<MUIElement> container = (MElementContainer<MUIElement>) parent;
container.setSelectedElement(element);
if (window != parent) {
showElementInWindow(window, parent);
}
}
}
@Override
public void bringToTop(MUIElement element) {
if (element instanceof MApplication) {
return;
}
MWindow window = getTopLevelWindowFor(element);
if (window == element) {
if (!element.isToBeRendered()) {
element.setToBeRendered(true);
}
window.getParent().setSelectedElement(window);
} else {
showElementInWindow(window, element);
}
UIEvents.publishEvent(UIEvents.UILifeCycle.BRINGTOTOP, element);
}
/**
* Start a drag operation on the given element.
*
* @param element The element to drag
*/
public void dragStart(DnDInfo info) {
// cache a placeholder where the element started (NOTE: this also prevents the parent from
// being auto-removed by going 'empty'
if (dragElement.getParent() != null) {
if (dragElement instanceof MStackElement)
dragPH = AdvancedFactoryImpl.eINSTANCE.createPlaceholder();
else if (dragElement instanceof MPartStack)
dragPH = BasicFactoryImpl.eINSTANCE.createPartSashContainer();
else if (dragElement instanceof MTrimElement)
dragPH = MenuFactoryImpl.eINSTANCE.createToolControl();
dragPH.setElementId(DRAG_PLACEHOLDER_ID);
dragPH.setToBeRendered(false);
List<MUIElement> kids = dragElement.getParent().getChildren();
kids.add(kids.indexOf(dragElement), dragPH);
}
dropAgent = dndManager.getDropAgent(dragElement, info);
if (dropAgent != null) dropAgent.dragEnter(dragElement, info);
}
public Object createWidget(final MUIElement element, Object parent) {
MPlaceholder ph = (MPlaceholder) element;
final MUIElement ref = ph.getRef();
ref.setCurSharedRef(ph);
List<MPlaceholder> renderedRefs = renderedMap.get(ref);
if (renderedRefs == null) {
renderedRefs = new ArrayList<MPlaceholder>();
renderedMap.put(ref, renderedRefs);
}
if (!renderedRefs.contains(ph)) renderedRefs.add(ph);
Composite newComp = new Composite((Composite) parent, SWT.NONE);
newComp.setLayout(new FillLayout());
Control refWidget = (Control) ref.getWidget();
if (refWidget == null) {
ref.setToBeRendered(true);
refWidget = (Control) renderingEngine.createGui(ref, newComp, getContextForParent(ref));
} else {
if (refWidget.getParent() != newComp) {
refWidget.setParent(newComp);
}
}
if (ref instanceof MContext) {
IEclipseContext context = ((MContext) ref).getContext();
IEclipseContext newParentContext = getContext(ph);
if (context.getParent() != newParentContext) {
context.setParent(newParentContext);
}
}
return newComp;
}
@Override
public void hidePart(MPart part, boolean force) {
if (isInContainer(part)) {
MPlaceholder sharedRef = part.getCurSharedRef();
MUIElement toBeRemoved = getRemoveTarget(part);
MElementContainer<MUIElement> parent = getParent(toBeRemoved);
List<MUIElement> children = parent.getChildren();
// check if we're a placeholder but not actually the shared ref of the part
if (toBeRemoved != part && toBeRemoved instanceof MPlaceholder && sharedRef != toBeRemoved) {
toBeRemoved.setToBeRendered(false);
// if so, not much to do, remove ourselves if necessary but that's it
if (force || part.getTags().contains(REMOVE_ON_HIDE_TAG)) {
parent.getChildren().remove(toBeRemoved);
}
return;
}
boolean isActiveChild = isActiveChild(part);
MPart activationCandidate = null;
// check if we're the active child
if (isActiveChild) {
// get the activation candidate if we are
activationCandidate = partActivationHistory.getNextActivationCandidate(getParts(), part);
}
MPerspective thePersp = modelService.getPerspectiveFor(toBeRemoved);
boolean needNewSel =
thePersp == null || !thePersp.getTags().contains("PerspClosing"); // $NON-NLS-1$
if (needNewSel) {
if (parent.getSelectedElement() == toBeRemoved) {
// if we're the selected element and we're going to be hidden, need to select
// something else
MUIElement candidate = partActivationHistory.getSiblingSelectionCandidate(part);
candidate =
candidate == null
? null
: candidate.getCurSharedRef() == null ? candidate : candidate.getCurSharedRef();
if (candidate != null && children.contains(candidate)) {
parent.setSelectedElement(candidate);
} else {
for (MUIElement child : children) {
if (child != toBeRemoved && child.isToBeRendered()) {
parent.setSelectedElement(child);
break;
}
}
}
}
if (activationCandidate == null) {
// nothing else to activate and we're the active child, deactivate
if (isActiveChild) {
part.getContext().deactivate();
}
} else {
// activate our candidate
activate(activationCandidate);
}
}
if (toBeRemoved != null) {
toBeRemoved.setToBeRendered(false);
} else {
part.setToBeRendered(false);
}
if (parent.getSelectedElement() == toBeRemoved) {
parent.setSelectedElement(null);
}
if (force || part.getTags().contains(REMOVE_ON_HIDE_TAG)) {
children.remove(toBeRemoved);
}
// remove ourselves from the activation history also since we're being hidden
partActivationHistory.forget(getWindow(), part, toBeRemoved == part);
}
}
