-/*******************************************************************************\r
- * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
- * in Industry THTH ry.\r
- * All rights reserved. This program and the accompanying materials\r
- * are made available under the terms of the Eclipse Public License v1.0\r
- * which accompanies this distribution, and is available at\r
- * http://www.eclipse.org/legal/epl-v10.html\r
- *\r
- * Contributors:\r
- * VTT Technical Research Centre of Finland - initial API and implementation\r
- *******************************************************************************/\r
-package org.simantics.ui.dnd;\r
-\r
-import org.eclipse.jface.viewers.ISelectionProvider;\r
-import org.eclipse.jface.viewers.IStructuredSelection;\r
-import org.eclipse.swt.dnd.DND;\r
-import org.eclipse.swt.dnd.DragSource;\r
-import org.eclipse.swt.dnd.DragSourceEvent;\r
-import org.eclipse.swt.dnd.DragSourceListener;\r
-import org.eclipse.swt.dnd.TextTransfer;\r
-import org.eclipse.swt.dnd.Transfer;\r
-import org.eclipse.swt.widgets.Control;\r
-import org.simantics.db.Session;\r
-import org.simantics.db.common.ResourceArray;\r
-import org.simantics.db.exception.DatabaseException;\r
-import org.simantics.ui.utils.ResourceAdaptionUtils;\r
-\r
-/**\r
- * A basic combined implementation of an SWT {@link DragSource} and\r
- * {@link DragSourceListener} that supports the following transfers:\r
- * <ul>\r
- * <li>{@link TextTransfer}</li>\r
- * <li>{@link ResourceReferenceTransfer}</li>\r
- * <li>{@link LocalObjectTransfer}</li>\r
- * </ul>\r
- * \r
- * <p>\r
- * Initialization requires the SWT {@link Control} which the drag source is\r
- * attached, an {@link ISelectionProvider} for the control and a database\r
- * session.\r
- * \r
- * @author Tuukka Lehtonen\r
- */\r
-public class BasicDragSource implements DragSourceListener, SessionContainer {\r
-\r
- private Transfer[] transferAgents;\r
-\r
- private ISelectionProvider selectionProvider;\r
-\r
- private IStructuredSelection sel;\r
-\r
- private ResourceArray[] resources;\r
-\r
- private Session session;\r
-\r
- private String purpose;\r
-\r
- /**\r
- * @param selectionProvider\r
- * @param sourceControl\r
- * @param session the database Session to be used for serialization by this\r
- * drag source or <code>null</code> to put this drag source in\r
- * disabled state at construction time. To later enable this drag\r
- * source, use {@link #setSession(Session)} to set the resource\r
- * serializer.\r
- */\r
- public BasicDragSource(ISelectionProvider selectionProvider, Control sourceControl, Session session) {\r
- this(selectionProvider, sourceControl, session, null);\r
- }\r
-\r
- /**\r
- * @param selectionProvider\r
- * @param sourceControl\r
- * @param session the database Session to be used for serialization by this\r
- * drag source or <code>null</code> to put this drag source in\r
- * disabled state at construction time. To later enable this drag\r
- * source, use {@link #setSession(Session)} to set the resource\r
- * serializer.\r
- * @param purpose a string for defining a designation of the purpose of this\r
- * drag source. <code>null</code> indicates no special purpose.\r
- */\r
- public BasicDragSource(ISelectionProvider selectionProvider, Control sourceControl, Session session, String purpose) {\r
- this.selectionProvider = selectionProvider;\r
- this.transferAgents = new Transfer[] { \r
- TextTransfer.getInstance(), \r
- ResourceReferenceTransfer.createInstance(purpose),\r
- LocalObjectTransfer.getTransfer()\r
- };\r
- this.session = session;\r
- this.purpose = purpose;\r
- DragSource source = new DragSource(sourceControl, DND.DROP_LINK | DND.DROP_MOVE | DND.DROP_COPY | DND.DROP_DEFAULT);\r
- source.setTransfer(transferAgents);\r
- source.addDragListener(this);\r
-\r
- // NOTE: This will disable SWT DND selection screenshot painting.\r
- source.setDragSourceEffect(new NoImageDragSourceEffect(sourceControl));\r
- }\r
-\r
- @Override\r
- public Session getSession() {\r
- return session;\r
- }\r
-\r
- @Override\r
- public void setSession(Session session) {\r
- this.session = session;\r
- }\r
-\r
- public void dragStart(DragSourceEvent event) {\r
- // Don't start dragging by default.\r
- event.doit = false;\r
-\r
- // Drag won't work without a database session.\r
- if (session == null)\r
- return;\r
-\r
- // Allow drag to start only if the selection is non-empty.\r
- sel = (IStructuredSelection) selectionProvider.getSelection();\r
- if (sel == null || sel.isEmpty())\r
- return;\r
-\r
- resources = ResourceAdaptionUtils.toResourceArrays(sel);\r
-\r
- event.doit = resources.length > 0; \r
- }\r
-\r
- public void dragSetData(DragSourceEvent event) {\r
- if (ResourceReferenceTransfer.getInstance().isSupportedType(event.dataType)) {\r
- event.data = resources; \r
- } else if (LocalObjectTransfer.getTransfer().isSupportedType(event.dataType)) {\r
- event.data = sel;\r
- } else if (TextTransfer.getInstance().isSupportedType(event.dataType)) {\r
- try {\r
- event.data = ResourceTransferUtils.createStringTransferable(session, resources, purpose);\r
- } catch (DatabaseException e) {\r
- event.doit = false;\r
- e.printStackTrace();\r
- }\r
- }\r
- }\r
-\r
- public void dragFinished(DragSourceEvent event) {\r
- // release resources\r
- sel = null;\r
- resources = null;\r
- }\r
-\r
-}\r
+/*******************************************************************************
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * 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:
+ * VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.ui.dnd;
+
+import org.eclipse.jface.viewers.ISelectionProvider;
+import org.eclipse.jface.viewers.IStructuredSelection;
+import org.eclipse.swt.dnd.DND;
+import org.eclipse.swt.dnd.DragSource;
+import org.eclipse.swt.dnd.DragSourceEvent;
+import org.eclipse.swt.dnd.DragSourceListener;
+import org.eclipse.swt.dnd.TextTransfer;
+import org.eclipse.swt.dnd.Transfer;
+import org.eclipse.swt.widgets.Control;
+import org.simantics.db.Session;
+import org.simantics.db.common.ResourceArray;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.ui.utils.ResourceAdaptionUtils;
+
+/**
+ * A basic combined implementation of an SWT {@link DragSource} and
+ * {@link DragSourceListener} that supports the following transfers:
+ * <ul>
+ * <li>{@link TextTransfer}</li>
+ * <li>{@link ResourceReferenceTransfer}</li>
+ * <li>{@link LocalObjectTransfer}</li>
+ * </ul>
+ *
+ * <p>
+ * Initialization requires the SWT {@link Control} which the drag source is
+ * attached, an {@link ISelectionProvider} for the control and a database
+ * session.
+ *
+ * @author Tuukka Lehtonen
+ */
+public class BasicDragSource implements DragSourceListener, SessionContainer {
+
+ private Transfer[] transferAgents;
+
+ private ISelectionProvider selectionProvider;
+
+ private IStructuredSelection sel;
+
+ private ResourceArray[] resources;
+
+ private Session session;
+
+ private String purpose;
+
+ /**
+ * @param selectionProvider
+ * @param sourceControl
+ * @param session the database Session to be used for serialization by this
+ * drag source or <code>null</code> to put this drag source in
+ * disabled state at construction time. To later enable this drag
+ * source, use {@link #setSession(Session)} to set the resource
+ * serializer.
+ */
+ public BasicDragSource(ISelectionProvider selectionProvider, Control sourceControl, Session session) {
+ this(selectionProvider, sourceControl, session, null);
+ }
+
+ /**
+ * @param selectionProvider
+ * @param sourceControl
+ * @param session the database Session to be used for serialization by this
+ * drag source or <code>null</code> to put this drag source in
+ * disabled state at construction time. To later enable this drag
+ * source, use {@link #setSession(Session)} to set the resource
+ * serializer.
+ * @param purpose a string for defining a designation of the purpose of this
+ * drag source. <code>null</code> indicates no special purpose.
+ */
+ public BasicDragSource(ISelectionProvider selectionProvider, Control sourceControl, Session session, String purpose) {
+ this.selectionProvider = selectionProvider;
+ this.transferAgents = new Transfer[] {
+ TextTransfer.getInstance(),
+ ResourceReferenceTransfer.createInstance(purpose),
+ LocalObjectTransfer.getTransfer()
+ };
+ this.session = session;
+ this.purpose = purpose;
+ DragSource source = new DragSource(sourceControl, DND.DROP_LINK | DND.DROP_MOVE | DND.DROP_COPY | DND.DROP_DEFAULT);
+ source.setTransfer(transferAgents);
+ source.addDragListener(this);
+
+ // NOTE: This will disable SWT DND selection screenshot painting.
+ source.setDragSourceEffect(new NoImageDragSourceEffect(sourceControl));
+ }
+
+ @Override
+ public Session getSession() {
+ return session;
+ }
+
+ @Override
+ public void setSession(Session session) {
+ this.session = session;
+ }
+
+ public void dragStart(DragSourceEvent event) {
+ // Don't start dragging by default.
+ event.doit = false;
+
+ // Drag won't work without a database session.
+ if (session == null)
+ return;
+
+ // Allow drag to start only if the selection is non-empty.
+ sel = (IStructuredSelection) selectionProvider.getSelection();
+ if (sel == null || sel.isEmpty())
+ return;
+
+ resources = ResourceAdaptionUtils.toResourceArrays(sel);
+
+ event.doit = resources.length > 0;
+ }
+
+ public void dragSetData(DragSourceEvent event) {
+ if (ResourceReferenceTransfer.getInstance().isSupportedType(event.dataType)) {
+ event.data = resources;
+ } else if (LocalObjectTransfer.getTransfer().isSupportedType(event.dataType)) {
+ event.data = sel;
+ } else if (TextTransfer.getInstance().isSupportedType(event.dataType)) {
+ try {
+ event.data = ResourceTransferUtils.createStringTransferable(session, resources, purpose);
+ } catch (DatabaseException e) {
+ event.doit = false;
+ e.printStackTrace();
+ }
+ }
+ }
+
+ public void dragFinished(DragSourceEvent event) {
+ // release resources
+ sel = null;
+ resources = null;
+ }
+
+}
Code Review / simantics / platform.git / blobdiff