Java tutorial
/******************************************************************************* * Copyright (c) 2001, 2011 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 * Jens Lukowski/Innoopract - initial renaming/restructuring * *******************************************************************************/ package org.eclipse.wst.dtd.ui.views.contentoutline; import java.util.HashMap; import java.util.Map; import org.eclipse.jface.action.IContributionItem; import org.eclipse.jface.action.IMenuListener; import org.eclipse.jface.preference.IPreferenceStore; import org.eclipse.jface.util.LocalSelectionTransfer; import org.eclipse.jface.util.SafeRunnable; import org.eclipse.jface.util.TransferDragSourceListener; import org.eclipse.jface.util.TransferDropTargetListener; import org.eclipse.jface.viewers.IContentProvider; import org.eclipse.jface.viewers.ILabelProvider; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.TreeViewer; import org.eclipse.swt.dnd.DND; import org.eclipse.swt.dnd.DragSourceEvent; import org.eclipse.swt.dnd.DropTargetEvent; import org.eclipse.swt.dnd.Transfer; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.graphics.Rectangle; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.TableItem; import org.eclipse.swt.widgets.TreeItem; import org.eclipse.wst.common.ui.internal.dnd.DragAndDropCommand; import org.eclipse.wst.dtd.core.internal.document.DTDModelImpl; import org.eclipse.wst.dtd.ui.internal.DTDUIPlugin; import org.eclipse.wst.dtd.ui.internal.dnd.DTDDragAndDropManager; import org.eclipse.wst.sse.ui.internal.contentoutline.PropertyChangeUpdateActionContributionItem; import org.eclipse.wst.sse.ui.internal.util.Assert; import org.eclipse.wst.sse.ui.views.contentoutline.ContentOutlineConfiguration; /** * Configuration for outline view page which shows DTD content. * * @see org.eclipse.wst.sse.ui.views.contentoutline.ContentOutlineConfiguration * @since 1.0 */ public class DTDContentOutlineConfiguration extends ContentOutlineConfiguration { private IContentProvider fContentProvider = null; private ILabelProvider fLabelProvider = null; private DTDContextMenuHelper fMenuHelper; private TransferDragSourceListener[] fTransferDragSourceListeners; private TransferDropTargetListener[] fTransferDropTargetListeners; private Map fViewerContributions; private final String OUTLINE_ORDER_PREF = "outline-order"; //$NON-NLS-1$ private final String OUTLINE_SORT_PREF = "outline-sort"; //$NON-NLS-1$ private static final String OUTLINE_FILTER_PREF = "org.eclipse.wst.dtd.ui.OutlinePage"; //$NON-NLS-1$ /** * Default constructor for DTDContentOutlineConfiguration. */ public DTDContentOutlineConfiguration() { // Must have empty constructor to createExecutableExtension super(); fViewerContributions = new HashMap(2); } /* * (non-Javadoc) * * @see org.eclipse.wst.sse.ui.views.contentoutline.ContentOutlineConfiguration#createToolbarContributions(org.eclipse.jface.viewers.TreeViewer) */ public IContributionItem[] createToolbarContributions(TreeViewer viewer) { Assert.isTrue(getContentProvider(viewer) instanceof DTDTreeContentProvider, "invalid content provider on viewer"); //$NON-NLS-1$ IContributionItem[] items = super.createToolbarContributions(viewer); SortAction sortAction = new SortAction(viewer, DTDUIPlugin.getDefault().getPreferenceStore(), OUTLINE_SORT_PREF); OrderAction orderAction = new OrderAction(viewer, (DTDTreeContentProvider) getContentProvider(viewer), DTDUIPlugin.getDefault().getPreferenceStore(), OUTLINE_ORDER_PREF); IContributionItem sortItem = new PropertyChangeUpdateActionContributionItem(sortAction); IContributionItem orderItem = new PropertyChangeUpdateActionContributionItem(orderAction); if (items == null) { items = new IContributionItem[2]; items[0] = sortItem; items[1] = orderItem; } else { IContributionItem[] combinedItems = new IContributionItem[items.length + 2]; combinedItems[0] = sortItem; combinedItems[1] = orderItem; System.arraycopy(items, 0, combinedItems, 2, items.length); items = combinedItems; } return items; } /* * (non-Javadoc) * * @see org.eclipse.wst.sse.ui.views.contentoutline.ContentOutlineConfiguration#getContentProvider(org.eclipse.jface.viewers.TreeViewer) */ public IContentProvider getContentProvider(TreeViewer viewer) { if (fContentProvider == null) { fContentProvider = new DTDTreeContentProvider(); } // return super.getContentProvider(viewer); return fContentProvider; } /* * (non-Javadoc) * * @see org.eclipse.wst.sse.ui.views.contentoutline.ContentOutlineConfiguration#getLabelProvider(org.eclipse.jface.viewers.TreeViewer) */ public ILabelProvider getLabelProvider(TreeViewer viewer) { if (fLabelProvider == null) { fLabelProvider = new DTDLabelProvider(); } // return super.getLabelProvider(viewer); return fLabelProvider; } /* * (non-Javadoc) * * @see org.eclipse.wst.sse.ui.views.contentoutline.ContentOutlineConfiguration#getMenuListener(org.eclipse.jface.viewers.TreeViewer) */ public IMenuListener getMenuListener(TreeViewer viewer) { IMenuListener listener = null; if (fMenuHelper == null && viewer.getInput() instanceof DTDModelImpl) { fMenuHelper = new DTDContextMenuHelper((DTDModelImpl) viewer.getInput()); fMenuHelper.createMenuListenersFor(viewer); } if (fMenuHelper != null) { listener = fMenuHelper.getMenuListener(); } return listener; } /* * (non-Javadoc) * * @see org.eclipse.wst.sse.ui.views.contentoutline.ContentOutlineConfiguration#getPreferenceStore() */ protected IPreferenceStore getPreferenceStore() { return DTDUIPlugin.getDefault().getPreferenceStore(); } /* * (non-Javadoc) * * @see org.eclipse.wst.sse.ui.views.contentoutline.ContentOutlineConfiguration#getTransferDragSourceListeners(org.eclipse.jface.viewers.TreeViewer) */ public TransferDragSourceListener[] getTransferDragSourceListeners(final TreeViewer treeViewer) { if (fTransferDragSourceListeners == null) { fTransferDragSourceListeners = new TransferDragSourceListener[] { new TransferDragSourceListener() { public void dragFinished(DragSourceEvent event) { LocalSelectionTransfer.getTransfer().setSelection(null); } public void dragSetData(DragSourceEvent event) { } public void dragStart(DragSourceEvent event) { LocalSelectionTransfer.getTransfer().setSelection(treeViewer.getSelection()); } public Transfer getTransfer() { return LocalSelectionTransfer.getTransfer(); } } }; } return fTransferDragSourceListeners; } /* * (non-Javadoc) * * @see org.eclipse.wst.sse.ui.views.contentoutline.ContentOutlineConfiguration#getTransferDropTargetListeners(org.eclipse.jface.viewers.TreeViewer) */ public TransferDropTargetListener[] getTransferDropTargetListeners(final TreeViewer treeViewer) { if (fTransferDropTargetListeners == null) { fTransferDropTargetListeners = new TransferDropTargetListener[] { new TransferDropTargetListener() { public void dragEnter(DropTargetEvent event) { } public void dragLeave(DropTargetEvent event) { } public void dragOperationChanged(DropTargetEvent event) { } public void dragOver(DropTargetEvent event) { event.feedback = DND.FEEDBACK_SELECT; float feedbackFloat = getHeightInItem(event); if (feedbackFloat > 0.75) { event.feedback = DND.FEEDBACK_INSERT_AFTER; } else if (feedbackFloat < 0.25) { event.feedback = DND.FEEDBACK_INSERT_BEFORE; } event.feedback |= DND.FEEDBACK_EXPAND | DND.FEEDBACK_SCROLL; } public void drop(DropTargetEvent event) { if (event.operations != DND.DROP_NONE && LocalSelectionTransfer.getTransfer() .getSelection() instanceof IStructuredSelection) { IStructuredSelection selection = (IStructuredSelection) LocalSelectionTransfer.getTransfer() .getSelection(); if (selection != null && !selection.isEmpty() && event.item != null && event.item.getData() != null) { /* * the command uses these numbers instead of the * feedback constants (even though it converts in * the other direction as well) */ float feedbackFloat = getHeightInItem(event); final DragAndDropCommand command = new DTDDragAndDropManager().createCommand( event.item.getData(), feedbackFloat, event.operations, event.detail, selection.toList()); if (command != null && command.canExecute()) { SafeRunnable.run(new SafeRunnable() { public void run() throws Exception { command.execute(); } }); } } } } public void dropAccept(DropTargetEvent event) { } private float getHeightInItem(DropTargetEvent event) { if (event.item == null) return .5f; if (event.item instanceof TreeItem) { TreeItem treeItem = (TreeItem) event.item; Control control = treeItem.getParent(); Point point = control.toControl(new Point(event.x, event.y)); Rectangle bounds = treeItem.getBounds(); return (float) (point.y - bounds.y) / (float) bounds.height; } else if (event.item instanceof TableItem) { TableItem tableItem = (TableItem) event.item; Control control = tableItem.getParent(); Point point = control.toControl(new Point(event.x, event.y)); Rectangle bounds = tableItem.getBounds(0); return (float) (point.y - bounds.y) / (float) bounds.height; } else { return 0.0F; } } public Transfer getTransfer() { return LocalSelectionTransfer.getTransfer(); } public boolean isEnabled(DropTargetEvent event) { return getTransfer().isSupportedType(event.currentDataType); } } }; } return fTransferDropTargetListeners; } /* * (non-Javadoc) * * @see org.eclipse.wst.sse.ui.views.contentoutline.ContentOutlineConfiguration#unconfigure(org.eclipse.jface.viewers.TreeViewer) */ public void unconfigure(TreeViewer viewer) { super.unconfigure(viewer); fViewerContributions.remove(viewer); if (fMenuHelper != null) { fMenuHelper.removeMenuListenersFor(viewer); fMenuHelper = null; } } protected String getOutlineFilterTarget() { return OUTLINE_FILTER_PREF; } }