| /******************************************************************************* |
| * Copyright (c) 2000, 2006 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 |
| *******************************************************************************/ |
| package org.eclipse.ui.internal; |
| |
| import org.eclipse.jface.action.ContributionItem; |
| import org.eclipse.jface.preference.IPreferenceStore; |
| import org.eclipse.jface.resource.ImageDescriptor; |
| import org.eclipse.osgi.util.NLS; |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.events.SelectionAdapter; |
| import org.eclipse.swt.events.SelectionEvent; |
| import org.eclipse.swt.graphics.GC; |
| import org.eclipse.swt.graphics.Image; |
| import org.eclipse.swt.widgets.ToolBar; |
| import org.eclipse.swt.widgets.ToolItem; |
| import org.eclipse.ui.IPerspectiveDescriptor; |
| import org.eclipse.ui.IWorkbenchPage; |
| import org.eclipse.ui.IWorkbenchPreferenceConstants; |
| import org.eclipse.ui.internal.util.PrefUtil; |
| |
| /** |
| * A {@link ContributionItem} specifically for contributions to the perspective switcher. |
| * |
| */ |
| public class PerspectiveBarContributionItem extends ContributionItem { |
| |
| private IPerspectiveDescriptor perspective; |
| |
| private IPreferenceStore apiPreferenceStore = PrefUtil |
| .getAPIPreferenceStore(); |
| |
| private ToolItem toolItem = null; |
| |
| private Image image; |
| |
| private IWorkbenchPage workbenchPage; |
| |
| /** |
| * Create a new perspective contribution item |
| * |
| * @param perspective the descriptor for the perspective |
| * @param workbenchPage the page that this perspective is in |
| */ |
| public PerspectiveBarContributionItem(IPerspectiveDescriptor perspective, |
| IWorkbenchPage workbenchPage) { |
| super(perspective.getId()); |
| this.perspective = perspective; |
| this.workbenchPage = workbenchPage; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.jface.action.ContributionItem#dispose() |
| */ |
| public void dispose() { |
| super.dispose(); |
| if (image != null && !image.isDisposed()) { |
| image.dispose(); |
| image = null; |
| } |
| apiPreferenceStore = null; |
| workbenchPage = null; |
| perspective = null; |
| |
| } |
| |
| public void fill(ToolBar parent, int index) { |
| if (toolItem == null && parent != null && !parent.isDisposed()) { |
| |
| if (index >= 0) { |
| toolItem = new ToolItem(parent, SWT.CHECK, index); |
| } else { |
| toolItem = new ToolItem(parent, SWT.CHECK); |
| } |
| |
| if (image == null || image.isDisposed()) { |
| createImage(); |
| } |
| toolItem.setImage(image); |
| |
| toolItem.setToolTipText(NLS.bind(WorkbenchMessages.PerspectiveBarContributionItem_toolTip, perspective.getLabel())); |
| toolItem.addSelectionListener(new SelectionAdapter() { |
| |
| public void widgetSelected(SelectionEvent event) { |
| select(); |
| } |
| }); |
| toolItem.setData(this); //TODO review need for this |
| update(); |
| } |
| } |
| |
| private void createImage() { |
| ImageDescriptor imageDescriptor = perspective.getImageDescriptor(); |
| if (imageDescriptor != null) { |
| image = imageDescriptor.createImage(); |
| } else { |
| image = WorkbenchImages.getImageDescriptor( |
| IWorkbenchGraphicConstants.IMG_ETOOL_DEF_PERSPECTIVE) |
| .createImage(); |
| } |
| } |
| |
| Image getImage() { |
| if (image == null) { |
| createImage(); |
| } |
| return image; |
| } |
| |
| /** |
| * Select this perspective |
| */ |
| public void select() { |
| if (workbenchPage.getPerspective() != perspective) { |
| workbenchPage.setPerspective(perspective); |
| } else { |
| toolItem.setSelection(true); |
| } |
| } |
| |
| public void update() { |
| if (toolItem != null && !toolItem.isDisposed()) { |
| toolItem |
| .setSelection(workbenchPage.getPerspective() == perspective); |
| if (apiPreferenceStore |
| .getBoolean(IWorkbenchPreferenceConstants.SHOW_TEXT_ON_PERSPECTIVE_BAR)) { |
| if (apiPreferenceStore.getString( |
| IWorkbenchPreferenceConstants.DOCK_PERSPECTIVE_BAR) |
| .equals(IWorkbenchPreferenceConstants.TOP_LEFT)) { |
| toolItem.setText(perspective.getLabel()); |
| } else { |
| toolItem.setText(shortenText(perspective.getLabel(), |
| toolItem)); |
| } |
| } else { |
| toolItem.setText(""); //$NON-NLS-1$ |
| } |
| } |
| } |
| |
| /** |
| * Update this item with a new perspective descriptor |
| * @param newDesc |
| */ |
| public void update(IPerspectiveDescriptor newDesc) { |
| perspective = newDesc; |
| if (toolItem != null && !toolItem.isDisposed()) { |
| ImageDescriptor imageDescriptor = perspective.getImageDescriptor(); |
| if (imageDescriptor != null) { |
| toolItem.setImage(imageDescriptor.createImage()); |
| } else { |
| toolItem.setImage(WorkbenchImages.getImageDescriptor( |
| IWorkbenchGraphicConstants.IMG_ETOOL_DEF_PERSPECTIVE) |
| .createImage()); |
| } |
| toolItem.setToolTipText(NLS.bind(WorkbenchMessages.PerspectiveBarContributionItem_toolTip, perspective.getLabel() )); |
| } |
| update(); |
| } |
| |
| IWorkbenchPage getPage() { |
| return workbenchPage; |
| } |
| |
| IPerspectiveDescriptor getPerspective() { |
| return perspective; |
| } |
| |
| ToolItem getToolItem() { |
| return toolItem; |
| } |
| |
| /** |
| * Answer whether the receiver is a match for the provided |
| * perspective descriptor |
| * |
| * @param perspective the perspective descriptor |
| * @param workbenchPage the page |
| * @return <code>true</code> if it is a match |
| */ |
| public boolean handles(IPerspectiveDescriptor perspective, |
| IWorkbenchPage workbenchPage) { |
| return this.perspective == perspective |
| && this.workbenchPage == workbenchPage; |
| } |
| |
| /** |
| * Set the current perspective |
| * @param newPerspective |
| */ |
| public void setPerspective(IPerspectiveDescriptor newPerspective) { |
| this.perspective = newPerspective; |
| } |
| |
| // TODO review need for this method |
| void setSelection(boolean b) { |
| if (toolItem != null && !toolItem.isDisposed()) { |
| toolItem.setSelection(b); |
| } |
| } |
| |
| static int getMaxWidth(Image image) { |
| return image.getBounds().width * 5; |
| } |
| |
| private static final String ellipsis = "..."; //$NON-NLS-1$ |
| |
| protected String shortenText(String textValue, ToolItem item) { |
| if (textValue == null || toolItem == null || toolItem.isDisposed()) { |
| return null; |
| } |
| String returnText = textValue; |
| GC gc = new GC(item.getParent()); |
| int maxWidth = getMaxWidth(item.getImage()); |
| if (gc.textExtent(textValue).x >= maxWidth) { |
| for (int i = textValue.length(); i > 0; i--) { |
| String test = textValue.substring(0, i); |
| test = test + ellipsis; |
| if (gc.textExtent(test).x < maxWidth) { |
| returnText = test; |
| break; |
| } |
| } |
| } |
| gc.dispose(); |
| return returnText; |
| } |
| } |