private Object safeCreateGui(MUIElement element) {
// Obtain the necessary parent widget
Object parent = null;
MUIElement parentME = element.getParent();
if (parentME == null) parentME = (MUIElement) ((EObject) element).eContainer();
if (parentME != null) {
AbstractPartRenderer renderer = getRendererFor(parentME);
if (renderer != null) {
if (!element.isVisible()) {
parent = getLimboShell();
} else {
parent = renderer.getUIContainer(element);
}
}
}
// Obtain the necessary parent context
IEclipseContext parentContext = null;
if (element.getCurSharedRef() != null) {
MPlaceholder ph = element.getCurSharedRef();
parentContext = getContext(ph.getParent());
} else if (parentContext == null && element.getParent() != null) {
parentContext = getContext(element.getParent());
} else if (parentContext == null && element.getParent() == null) {
parentContext = getContext((MUIElement) ((EObject) element).eContainer());
}
return safeCreateGui(element, parent, parentContext);
}
protected Object createWidget(MUIElement element, Object parent) {
AbstractPartRenderer renderer = getRenderer(element, parent);
if (renderer != null) {
// Remember which renderer is responsible for this widget
element.setRenderer(renderer);
Object newWidget = renderer.createWidget(element, parent);
if (newWidget != null) {
renderer.bindWidget(element, newWidget);
return newWidget;
}
}
return null;
}
public void handleEvent(Event event) {
MUIElement changedElement = (MUIElement) event.getProperty(UIEvents.EventTags.ELEMENT);
MUIElement parent = changedElement.getParent();
if (parent == null) {
parent = (MUIElement) ((EObject) changedElement).eContainer();
if (parent == null) {
return;
}
}
AbstractPartRenderer renderer = (AbstractPartRenderer) parent.getRenderer();
if (renderer == null || parent instanceof MToolBar) return;
// Re-parent the control based on the visible state
if (changedElement.isVisible()) {
if (changedElement.isToBeRendered()) {
if (changedElement.getWidget() instanceof Control) {
// Ensure that the control is under its 'real' parent if
// it's visible
Composite realComp = (Composite) renderer.getUIContainer(changedElement);
Control ctrl = (Control) changedElement.getWidget();
ctrl.setParent(realComp);
fixZOrder(changedElement);
}
if (parent instanceof MElementContainer<?>) {
renderer.childRendered((MElementContainer<MUIElement>) parent, changedElement);
}
}
} else {
// Put the control under the 'limbo' shell
if (changedElement.getWidget() instanceof Control) {
Control ctrl = (Control) changedElement.getWidget();
if (!(ctrl instanceof Shell)) {
ctrl.getShell().layout(new Control[] {ctrl}, SWT.DEFER);
}
ctrl.setParent(getLimboShell());
}
if (parent instanceof MElementContainer<?>) {
renderer.hideChild((MElementContainer<MUIElement>) parent, changedElement);
}
}
}
private void safeRemoveGui(MUIElement element) {
if (removeRoot == null) removeRoot = element;
renderedElements.remove(element);
// We call 'hideChild' *before* checking if the actual element
// has been rendered in order to pick up cases of 'lazy loading'
MUIElement parent = element.getParent();
AbstractPartRenderer parentRenderer = parent != null ? getRendererFor(parent) : null;
if (parentRenderer != null) {
parentRenderer.hideChild(element.getParent(), element);
}
AbstractPartRenderer renderer = getRendererFor(element);
// If the element hasn't been rendered then this is a NO-OP
if (renderer != null) {
if (element instanceof MElementContainer<?>) {
MElementContainer<MUIElement> container = (MElementContainer<MUIElement>) element;
MUIElement selectedElement = container.getSelectedElement();
List<MUIElement> children = container.getChildren();
for (MUIElement child : children) {
// remove stuff in the "back" first
if (child != selectedElement) {
removeGui(child);
}
}
if (selectedElement != null && children.contains(selectedElement)) {
// now remove the selected element
removeGui(selectedElement);
}
}
if (element instanceof MPerspective) {
MPerspective perspective = (MPerspective) element;
for (MWindow subWindow : perspective.getWindows()) {
removeGui(subWindow);
}
} else if (element instanceof MWindow) {
MWindow window = (MWindow) element;
for (MWindow subWindow : window.getWindows()) {
removeGui(subWindow);
}
if (window instanceof MTrimmedWindow) {
MTrimmedWindow trimmedWindow = (MTrimmedWindow) window;
for (MUIElement trimBar : trimmedWindow.getTrimBars()) {
removeGui(trimBar);
}
}
}
if (element instanceof MContribution) {
MContribution contribution = (MContribution) element;
Object client = contribution.getObject();
IEclipseContext parentContext = renderer.getContext(element);
if (parentContext != null && client != null) {
try {
ContextInjectionFactory.invoke(client, PersistState.class, parentContext, null);
} catch (Exception e) {
if (logger != null) {
logger.error(e);
}
}
}
}
renderer.disposeWidget(element);
// unset the client object
if (element instanceof MContribution) {
MContribution contribution = (MContribution) element;
Object client = contribution.getObject();
IEclipseContext parentContext = renderer.getContext(element);
if (parentContext != null && client != null) {
try {
ContextInjectionFactory.uninject(client, parentContext);
} catch (Exception e) {
if (logger != null) {
logger.error(e);
}
}
}
contribution.setObject(null);
}
// dispose the context
if (element instanceof MContext) {
clearContext((MContext) element);
}
}
if (removeRoot == element) removeRoot = null;
}
public Object safeCreateGui(
MUIElement element, Object parentWidget, IEclipseContext parentContext) {
if (!element.isToBeRendered()) return null;
if (!renderedElements.contains(element)) renderedElements.add(element);
// no creates while processing a remove
if (removeRoot != null) {
return null;
}
Object currentWidget = element.getWidget();
if (currentWidget != null) {
if (currentWidget instanceof Control) {
Control control = (Control) currentWidget;
// make sure the control is visible
control.setVisible(true);
if (parentWidget instanceof Composite) {
Composite currentParent = control.getParent();
if (currentParent != parentWidget) {
// check if the original parent was a tab folder
if (currentParent instanceof CTabFolder) {
CTabFolder folder = (CTabFolder) currentParent;
// if we used to be the tab folder's top right
// control, unset it
if (folder.getTopRight() == control) {
folder.setTopRight(null);
}
}
// the parents are different so we should reparent it
control.setParent((Composite) parentWidget);
}
}
}
// Reparent the context (or the kid's context)
if (element instanceof MContext) {
IEclipseContext ctxt = ((MContext) element).getContext();
if (ctxt != null) ctxt.setParent(parentContext);
} else {
List<MContext> childContexts =
modelService.findElements(element, null, MContext.class, null);
for (MContext c : childContexts) {
// Ensure that we only reset the context of our direct
// children
MUIElement kid = (MUIElement) c;
MUIElement parent = kid.getParent();
if (parent == null && kid.getCurSharedRef() != null)
parent = kid.getCurSharedRef().getParent();
if (!(element instanceof MPlaceholder) && parent != element) continue;
if (c.getContext() != null && c.getContext().getParent() != parentContext) {
c.getContext().setParent(parentContext);
}
}
}
// Now that we have a widget let the parent (if any) know
if (element.getParent() instanceof MUIElement) {
MElementContainer<MUIElement> parentElement = element.getParent();
AbstractPartRenderer parentRenderer = getRendererFor(parentElement);
if (parentRenderer != null) parentRenderer.childRendered(parentElement, element);
}
return element.getWidget();
}
if (element instanceof MContext) {
MContext ctxt = (MContext) element;
// Assert.isTrue(ctxt.getContext() == null,
// "Before rendering Context should be null");
if (ctxt.getContext() == null) {
IEclipseContext lclContext = parentContext.createChild(getContextName(element));
populateModelInterfaces(ctxt, lclContext, element.getClass().getInterfaces());
ctxt.setContext(lclContext);
// System.out.println("New Context: " + lclContext.toString()
// + " parent: " + parentContext.toString());
// make sure the context knows about these variables that have
// been defined in the model
for (String variable : ctxt.getVariables()) {
lclContext.declareModifiable(variable);
}
Map<String, String> props = ctxt.getProperties();
for (String key : props.keySet()) {
lclContext.set(key, props.get(key));
}
E4Workbench.processHierarchy(element);
}
}
// Create a control appropriate to the part
Object newWidget = createWidget(element, parentWidget);
// Remember that we've created the control
if (newWidget != null) {
AbstractPartRenderer renderer = getRendererFor(element);
// Have the renderer hook up any widget specific listeners
renderer.hookControllerLogic(element);
// Process its internal structure through the renderer that created
// it
if (element instanceof MElementContainer) {
renderer.processContents((MElementContainer<MUIElement>) element);
}
// Allow a final chance to set up
renderer.postProcess(element);
// Now that we have a widget let the parent (if any) know
if (element.getParent() instanceof MUIElement) {
MElementContainer<MUIElement> parentElement = element.getParent();
AbstractPartRenderer parentRenderer = getRendererFor(parentElement);
if (parentRenderer != null) parentRenderer.childRendered(parentElement, element);
}
} else {
// failed to create the widget, dispose its context if necessary
if (element instanceof MContext) {
MContext ctxt = (MContext) element;
IEclipseContext lclContext = ctxt.getContext();
if (lclContext != null) {
lclContext.dispose();
ctxt.setContext(null);
}
}
}
return newWidget;
}
public void handleEvent(Event event) {
Object changedObj = event.getProperty(UIEvents.EventTags.ELEMENT);
if (!(changedObj instanceof MElementContainer<?>)) return;
MElementContainer<MUIElement> changedElement = (MElementContainer<MUIElement>) changedObj;
boolean isApplication = changedObj instanceof MApplication;
boolean menuChild = changedObj instanceof MMenu;
// If the parent isn't in the UI then who cares?
AbstractPartRenderer renderer = getRendererFor(changedElement);
if ((!isApplication && renderer == null) || menuChild) return;
String eventType = (String) event.getProperty(UIEvents.EventTags.TYPE);
if (UIEvents.EventTypes.ADD.equals(eventType)) {
Activator.trace(Policy.DEBUG_RENDERER, "Child Added", null); // $NON-NLS-1$
MUIElement added = (MUIElement) event.getProperty(UIEvents.EventTags.NEW_VALUE);
// OK, we have a new -visible- part we either have to create
// it or host it under the correct parent. Note that we
// explicitly do *not* render non-selected elements in
// stacks (to support lazy loading).
boolean isStack = changedObj instanceof MGenericStack<?>;
boolean hasWidget = added.getWidget() != null;
boolean isSelected = added == changedElement.getSelectedElement();
boolean renderIt = !isStack || hasWidget || isSelected;
if (renderIt) {
// NOTE: createGui will call 'childAdded' if successful
Object w = createGui(added);
if (w instanceof Control && !(w instanceof Shell)) {
final Control ctrl = (Control) w;
fixZOrder(added);
if (!ctrl.isDisposed()) {
ctrl.getShell().layout(new Control[] {ctrl}, SWT.DEFER);
}
}
} else {
if (renderer != null && added.isToBeRendered())
renderer.childRendered(changedElement, added);
}
// If the element being added is a placeholder, check to see if
// it's 'globally visible' and, if so, remove all other
// 'local' placeholders referencing the same element.
int newLocation = modelService.getElementLocation(added);
if (newLocation == EModelService.IN_SHARED_AREA
|| newLocation == EModelService.OUTSIDE_PERSPECTIVE) {
MWindow topWin = modelService.getTopLevelWindowFor(added);
modelService.hideLocalPlaceholders(topWin, null);
}
} else if (UIEvents.EventTypes.REMOVE.equals(eventType)) {
Activator.trace(Policy.DEBUG_RENDERER, "Child Removed", null); // $NON-NLS-1$
MUIElement removed = (MUIElement) event.getProperty(UIEvents.EventTags.OLD_VALUE);
// Removing invisible elements is a NO-OP as far as the
// renderer is concerned
if (!removed.isToBeRendered()) return;
if (removed.getWidget() instanceof Control) {
Control ctrl = (Control) removed.getWidget();
ctrl.setLayoutData(null);
ctrl.getParent().layout(new Control[] {ctrl}, SWT.CHANGED | SWT.DEFER);
}
// Ensure that the element about to be removed is not the
// selected element
if (changedElement.getSelectedElement() == removed)
changedElement.setSelectedElement(null);
if (renderer != null) renderer.hideChild(changedElement, removed);
}
}
