Java tutorial
/******************************************************************************* * Copyright (c) 2004, 2009 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 * WindRiver - Bug 192028 [Memory View] Memory view does not * display memory blocks that do not reference IDebugTarget * Wind River Systems - Ted Williams - [Memory View] Memory View: Workflow Enhancements (Bug 215432) *******************************************************************************/ package org.eclipse.debug.internal.ui.views.memory.renderings; import org.eclipse.core.runtime.CoreException; import org.eclipse.core.runtime.IProgressMonitor; import org.eclipse.core.runtime.IStatus; import org.eclipse.core.runtime.Status; import org.eclipse.core.runtime.jobs.Job; import org.eclipse.debug.core.DebugException; import org.eclipse.debug.core.model.IMemoryBlock; import org.eclipse.debug.core.model.IMemoryBlockRetrieval; import org.eclipse.debug.internal.ui.DebugPluginImages; import org.eclipse.debug.internal.ui.DebugUIMessages; import org.eclipse.debug.internal.ui.DebugUIPlugin; import org.eclipse.debug.internal.ui.IInternalDebugUIConstants; import org.eclipse.debug.internal.ui.views.memory.MemoryViewUtil; import org.eclipse.debug.ui.DebugUITools; import org.eclipse.debug.ui.memory.AbstractMemoryRendering; import org.eclipse.debug.ui.memory.IMemoryRendering; import org.eclipse.debug.ui.memory.IMemoryRenderingBindingsListener; import org.eclipse.debug.ui.memory.IMemoryRenderingContainer; import org.eclipse.debug.ui.memory.IMemoryRenderingType; import org.eclipse.jface.util.PropertyChangeEvent; import org.eclipse.jface.viewers.DoubleClickEvent; import org.eclipse.jface.viewers.IBasicPropertyConstants; import org.eclipse.jface.viewers.IDoubleClickListener; import org.eclipse.jface.viewers.ILabelProvider; import org.eclipse.jface.viewers.ILabelProviderListener; import org.eclipse.jface.viewers.ISelection; import org.eclipse.jface.viewers.IStructuredContentProvider; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.ListViewer; import org.eclipse.jface.viewers.Viewer; import org.eclipse.swt.SWT; import org.eclipse.swt.events.KeyAdapter; import org.eclipse.swt.events.KeyEvent; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.events.SelectionListener; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Label; import org.eclipse.ui.progress.WorkbenchJob; /** * The rendering to allow users to create a rendering. * @since 3.1 */ public class CreateRendering extends AbstractMemoryRendering implements IMemoryRenderingBindingsListener { private ListViewer fViewer; private Label fMemoryBlockLabel; private IMemoryRenderingContainer fContainer; private Composite fCanvas; private String fLabel; private String fTabLabel; public CreateRendering(IMemoryRenderingContainer container) { super("org.eclipse.debug.internal.ui.views.createrendering"); //$NON-NLS-1$ fContainer = container; } class MemoryRenderingLabelProvider implements ILabelProvider { /* (non-Javadoc) * @see org.eclipse.jface.viewers.ILabelProvider#getImage(java.lang.Object) */ public Image getImage(Object element) { return DebugUIPlugin.getImageDescriptorRegistry().get( DebugPluginImages.getImageDescriptor(IInternalDebugUIConstants.IMG_ELCL_MONITOR_EXPRESSION)); } /* (non-Javadoc) * @see org.eclipse.jface.viewers.ILabelProvider#getText(java.lang.Object) */ public String getText(Object element) { if (element instanceof IMemoryRenderingType) { String label = ((IMemoryRenderingType) element).getLabel(); return label; } return element.toString(); } /* (non-Javadoc) * @see org.eclipse.jface.viewers.IBaseLabelProvider#addListener(org.eclipse.jface.viewers.ILabelProviderListener) */ public void addListener(ILabelProviderListener listener) { } /* (non-Javadoc) * @see org.eclipse.jface.viewers.IBaseLabelProvider#dispose() */ public void dispose() { } /* (non-Javadoc) * @see org.eclipse.jface.viewers.IBaseLabelProvider#isLabelProperty(java.lang.Object, java.lang.String) */ public boolean isLabelProperty(Object element, String property) { return false; } /* (non-Javadoc) * @see org.eclipse.jface.viewers.IBaseLabelProvider#removeListener(org.eclipse.jface.viewers.ILabelProviderListener) */ public void removeListener(ILabelProviderListener listener) { } } class MemoryRenderingContentProvider implements IStructuredContentProvider { /* (non-Javadoc) * @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object) */ public Object[] getElements(Object inputElement) { IMemoryRenderingType[] renderings = DebugUITools.getMemoryRenderingManager() .getRenderingTypes((IMemoryBlock) inputElement); return renderings; } /* (non-Javadoc) * @see org.eclipse.jface.viewers.IContentProvider#dispose() */ public void dispose() { } /* (non-Javadoc) * @see org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object) */ public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { } } /* (non-Javadoc) * @see org.eclipse.debug.ui.memory.IMemoryRendering#createControl(org.eclipse.swt.widgets.Composite) */ public Control createControl(Composite parent) { fCanvas = new Composite(parent, SWT.NONE); GridLayout compositeLayout = new GridLayout(); compositeLayout.numColumns = 2; compositeLayout.makeColumnsEqualWidth = false; fCanvas.setLayout(compositeLayout); GridData comositeSpec = new GridData(); comositeSpec.grabExcessVerticalSpace = true; comositeSpec.grabExcessHorizontalSpace = true; comositeSpec.horizontalAlignment = GridData.FILL; comositeSpec.verticalAlignment = GridData.CENTER; fCanvas.setLayoutData(comositeSpec); fMemoryBlockLabel = new Label(fCanvas, SWT.BORDER); String memoryBlockLabel = " "; //$NON-NLS-1$ memoryBlockLabel = getLabel(); fMemoryBlockLabel .setText(" " + DebugUIMessages.CreateRenderingTab_Memory_monitor + memoryBlockLabel + " "); //$NON-NLS-1$ //$NON-NLS-2$ GridData textLayout = new GridData(); textLayout.verticalAlignment = GridData.CENTER; textLayout.horizontalAlignment = GridData.BEGINNING; fMemoryBlockLabel.setLayoutData(textLayout); Label renderingLabel = new Label(fCanvas, SWT.NONE); renderingLabel.setText(DebugUIMessages.CreateRenderingTab_Select_renderings_to_create); GridData renderingLayout = new GridData(); renderingLayout.horizontalAlignment = GridData.BEGINNING; renderingLayout.verticalAlignment = GridData.CENTER; renderingLayout.horizontalSpan = 2; renderingLabel.setLayoutData(renderingLayout); fViewer = new ListViewer(fCanvas); fViewer.setContentProvider(new MemoryRenderingContentProvider()); fViewer.setLabelProvider(new MemoryRenderingLabelProvider()); fViewer.setInput(getMemoryBlock()); if (fViewer.getElementAt(0) != null) { fViewer.getList().select(0); } GridData listLayout = new GridData(GridData.FILL_BOTH); listLayout.horizontalSpan = 1; fViewer.getControl().setLayoutData(listLayout); fViewer.addDoubleClickListener(new IDoubleClickListener() { public void doubleClick(DoubleClickEvent event) { addRenderings(); } }); // listen for enter being pressed fViewer.getList().addKeyListener(new KeyAdapter() { public void keyPressed(KeyEvent e) { if (e.character == SWT.CR) addRenderings(); } }); Button addButton = new Button(fCanvas, SWT.NONE); addButton.setText(DebugUIMessages.CreateRenderingTab_Add_renderings); GridData buttonLayout = new GridData(); buttonLayout.horizontalAlignment = GridData.BEGINNING; buttonLayout.verticalAlignment = GridData.BEGINNING; addButton.setLayoutData(buttonLayout); addButton.addSelectionListener(new SelectionListener() { public void widgetSelected(SelectionEvent e) { addRenderings(); } public void widgetDefaultSelected(SelectionEvent e) { addRenderings(); } }); DebugUITools.getMemoryRenderingManager().addListener(this); return fCanvas; } private void addRenderings() { ISelection selection = fViewer.getSelection(); Object[] renderings = null; if (selection instanceof IStructuredSelection) { IStructuredSelection strucSelection = (IStructuredSelection) selection; renderings = strucSelection.toArray(); } if (renderings == null) { Status stat = new Status(IStatus.ERROR, DebugUIPlugin.getUniqueIdentifier(), DebugException.INTERNAL_ERROR, DebugUIMessages.CreateRenderingTab_0, null); DebugUIPlugin.errorDialog(DebugUIPlugin.getShell(), DebugUIMessages.CreateRenderingTab_1, DebugUIMessages.CreateRenderingTab_2, stat); // return; } // ask for debug target and memory block retrieval IMemoryBlockRetrieval standardMemRetrieval = MemoryViewUtil.getMemoryBlockRetrieval(getMemoryBlock()); if (standardMemRetrieval == null) return; // make a copy of the container, may be diposed when a rendering is added IMemoryRenderingContainer container = fContainer; // add memory renderings to Memory Rendering Manager for (int i = 0; i < renderings.length; i++) { if (renderings[i] instanceof IMemoryRenderingType) { try { IMemoryRendering rendering = ((IMemoryRenderingType) renderings[i]).createRendering(); if (rendering != null) { rendering.init(container, getMemoryBlock()); container.addMemoryRendering(rendering); } } catch (CoreException e) { MemoryViewUtil.openError(DebugUIMessages.CreateRendering_0, DebugUIMessages.CreateRendering_1, e); // } } } } /* (non-Javadoc) * @see org.eclipse.debug.ui.memory.IMemoryRendering#dispose() */ public void dispose() { fViewer = null; fCanvas = null; fContainer = null; fMemoryBlockLabel = null; DebugUITools.getMemoryRenderingManager().removeListener(this); } /* (non-Javadoc) * @see org.eclipse.debug.internal.ui.memory.AbstractMemoryRendering#getControl() */ public Control getControl() { return fCanvas; } public void memoryRenderingBindingsChanged() { if (fViewer != null) fViewer.refresh(); } public String getLabel() { if (fTabLabel == null) { fTabLabel = DebugUIMessages.CreateRendering_2; updateRenderingLabel(); } return fTabLabel; } public Image getImage() { return DebugUIPlugin.getImageDescriptorRegistry() .get(DebugPluginImages.getImageDescriptor(IInternalDebugUIConstants.IMG_ELCL_MONITOR_EXPRESSION)); } public void becomesVisible() { // Do nothing, do not want to connect/disconnect from clients } public void becomesHidden() { // Do nothing, do not want to connect/disconnect from clients } protected void updateRenderingLabel() { Job job = new Job("Update Rendering Label") { //$NON-NLS-1$ protected IStatus run(IProgressMonitor monitor) { fLabel = CreateRendering.super.getLabel(); fTabLabel = DebugUIMessages.CreateRenderingTab_label; firePropertyChangedEvent(new PropertyChangeEvent(CreateRendering.this, IBasicPropertyConstants.P_TEXT, null, fTabLabel)); WorkbenchJob wbJob = new WorkbenchJob("Create Rendering Update Label") { //$NON-NLS-1$ public IStatus runInUIThread(IProgressMonitor wbMonitor) { if (fMemoryBlockLabel != null) { fMemoryBlockLabel .setText(DebugUIMessages.CreateRenderingTab_Memory_monitor + " " + fLabel); //$NON-NLS-1$ fMemoryBlockLabel.getParent().layout(); } return Status.OK_STATUS; } }; wbJob.setSystem(true); wbJob.schedule(); return Status.OK_STATUS; } }; job.setSystem(true); job.schedule(); } }