/*******************************************************************************
* Copyright (c) 2004, 2008 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
* Wind River Systems - Ted Williams - [Memory View] Memory View: Workflow Enhancements (Bug 215432)
*******************************************************************************/
package org.eclipse.debug.internal.ui.views.memory;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.ISafeRunnable;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.SafeRunner;
import org.eclipse.core.runtime.Status;
import org.eclipse.debug.internal.ui.views.memory.renderings.ErrorRendering;
import org.eclipse.debug.ui.memory.IMemoryRendering;
import org.eclipse.jface.util.IPropertyChangeListener;
import org.eclipse.jface.util.PropertyChangeEvent;
import org.eclipse.jface.viewers.IBasicPropertyConstants;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.CTabItem;
import org.eclipse.swt.events.DisposeEvent;
import org.eclipse.swt.events.DisposeListener;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.ui.progress.WorkbenchJob;
/**
* Represents a tab in the Memory View. This is where memory renderings are
* hosted in the Memory View.
*
* @since 3.1
*/
public class MemoryViewTab implements IMemoryViewTab, IPropertyChangeListener, Listener {
private IMemoryRendering fRendering;
private CTabItem fTabItem;
private DisposeListener fDisposeListener;
private boolean fEnabled;
private boolean fIsDisposed = false;
private Control fControl;
private RenderingViewPane fContainer;
public MemoryViewTab(CTabItem tabItem, IMemoryRendering rendering, RenderingViewPane container) {
fTabItem = tabItem;
fRendering = rendering;
fContainer = container;
// set the rendering as the synchronization provider
// as the new rendering should be in focus and have control
// after it's created
if (container.getMemoryRenderingSite().getSynchronizationService() != null)
container.getMemoryRenderingSite().getSynchronizationService().setSynchronizationProvider(rendering);
Control control = createViewTab();
control.addListener(SWT.Activate, this);
control.addListener(SWT.Deactivate, this);
fTabItem.setControl(control);
fTabItem.setData(this);
fTabItem.setText(getLabel());
fTabItem.setImage(getImage());
fTabItem.addDisposeListener(fDisposeListener = new DisposeListener() {
@Override
public void widgetDisposed(DisposeEvent e) {
fTabItem.removeDisposeListener(fDisposeListener);
dispose();
}
});
}
private Control createViewTab() {
ISafeRunnable safeRunnable = new ISafeRunnable() {
@Override
public void handleException(Throwable exception) {
// create an error rendering to fill the view tab
ErrorRendering rendering = new ErrorRendering(fRendering.getRenderingId(), exception);
rendering.init(fContainer, fRendering.getMemoryBlock());
// dispose the rendering
fRendering.dispose();
fRendering = rendering;
fControl = rendering.createControl(fTabItem.getParent());
}
@Override
public void run() throws Exception {
fControl = fRendering.createControl(fTabItem.getParent());
fRendering.addPropertyChangeListener(getInstance());
}
};
SafeRunner.run(safeRunnable);
return fControl;
}
private String getLabel() {
return fRendering.getLabel();
}
private Image getImage() {
return fRendering.getImage();
}
/*
* (non-Javadoc)
* @see org.eclipse.debug.internal.ui.views.memory.IMemoryViewTab#dispose()
*/
@Override
public void dispose() {
if (fIsDisposed)
return;
fIsDisposed = true;
fRendering.removePropertyChangeListener(this);
if (!fControl.isDisposed()) {
fControl.removeListener(SWT.Activate, this);
fControl.removeListener(SWT.Deactivate, this);
}
// always deactivate rendering before disposing it.
fRendering.deactivated();
fRendering.dispose();
}
@Override
public boolean isDisposed() {
return fIsDisposed;
}
/*
* (non-Javadoc)
* @see
* org.eclipse.debug.internal.ui.views.memory.IMemoryViewTab#isEnabled()
*/
@Override
public boolean isEnabled() {
return fEnabled;
}
/*
* (non-Javadoc)
* @see
* org.eclipse.debug.internal.ui.views.memory.IMemoryViewTab#setEnabled(
* boolean)
*/
@Override
public void setEnabled(boolean enabled) {
fEnabled = enabled;
if (fEnabled)
fRendering.becomesVisible();
else
fRendering.becomesHidden();
}
/*
* (non-Javadoc)
* @see
* org.eclipse.debug.internal.ui.views.memory.IMemoryViewTab#setTabLabel
* (java.lang.String)
*/
@Override
public void setTabLabel(String label) {
fTabItem.setText(label);
}
/*
* (non-Javadoc)
* @see
* org.eclipse.debug.internal.ui.views.memory.IMemoryViewTab#getTabLabel()
*/
@Override
public String getTabLabel() {
return fTabItem.getText();
}
/*
* (non-Javadoc)
* @see
* org.eclipse.debug.internal.ui.views.memory.IMemoryViewTab#getRendering()
*/
@Override
public IMemoryRendering getRendering() {
return fRendering;
}
/*
* (non-Javadoc)
* @see
* org.eclipse.jface.util.IPropertyChangeListener#propertyChange(org.eclipse
* .jface.util.PropertyChangeEvent)
*/
@Override
public void propertyChange(final PropertyChangeEvent event) {
// make sure this runs on the UI thread, otherwise, it
// will get to a swt exception
WorkbenchJob job = new WorkbenchJob("MemoryViewTab PropertyChanged") { //$NON-NLS-1$
@Override
public IStatus runInUIThread(IProgressMonitor monitor) {
if (isDisposed())
return Status.OK_STATUS;
if (event.getSource() == fRendering) {
if (event.getProperty().equals(IBasicPropertyConstants.P_TEXT)) {
Object value = event.getNewValue();
if (value != null && value instanceof String) {
String label = (String) value;
setTabLabel(label);
} else {
setTabLabel(fRendering.getLabel());
}
}
if (event.getProperty().equals(IBasicPropertyConstants.P_IMAGE)) {
Object value = event.getNewValue();
if (value != null && value instanceof Image) {
Image image = (Image) value;
fTabItem.setImage(image);
} else {
fTabItem.setImage(fRendering.getImage());
}
}
}
return Status.OK_STATUS;
}
};
job.setSystem(true);
job.schedule();
}
private MemoryViewTab getInstance() {
return this;
}
/*
* (non-Javadoc)
* @see
* org.eclipse.swt.widgets.Listener#handleEvent(org.eclipse.swt.widgets.
* Event)
*/
@Override
public void handleEvent(Event event) {
if (event.type == SWT.Activate) {
fRendering.activated();
fContainer.setRenderingSelection(fRendering);
}
if (event.type == SWT.Deactivate) {
fRendering.deactivated();
}
}
}