Editing of texts inside SVG elements

[simantics/platform.git] / bundles / org.simantics.diagram / src / org / simantics / diagram / elements / SVGNode.java

diff --git a/bundles/org.simantics.diagram/src/org/simantics/diagram/elements/SVGNode.java b/bundles/org.simantics.diagram/src/org/simantics/diagram/elements/SVGNode.java
new file mode 100644 (file)
index 0000000..8084c2a
--- /dev/null
+++ b/bundles/org.simantics.diagram/src/org/simantics/diagram/elements/SVGNode.java
@@ -0,0 +1,153 @@
+/*******************************************************************************
+ * 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.diagram.elements;
+
+import java.awt.Graphics2D;
+import java.util.List;
+import java.util.Set;
+
+import org.simantics.g2d.canvas.ICanvasContext;
+import org.simantics.g2d.diagram.participant.Selection;
+import org.simantics.g2d.element.IElement;
+import org.simantics.scenegraph.ExportableWidget.RasterOutputWidget;
+import org.simantics.scenegraph.INode;
+import org.simantics.scenegraph.g2d.IG2DNode;
+import org.simantics.scenegraph.g2d.events.EventTypes;
+import org.simantics.scenegraph.g2d.events.KeyEvent.KeyPressedEvent;
+import org.simantics.scenegraph.g2d.events.MouseEvent.MouseClickEvent;
+import org.simantics.scenegraph.g2d.events.command.CommandEvent;
+import org.simantics.scenegraph.g2d.nodes.SVGNodeAssignment;
+import org.simantics.scenegraph.g2d.nodes.SingleElementNode;
+import org.simantics.scenegraph.utils.NodeUtil;
+
+import com.kitfox.svg.SVGDiagram;
+import com.kitfox.svg.SVGException;
+
+@RasterOutputWidget
+public class SVGNode extends org.simantics.scenegraph.g2d.nodes.SVGNode {
+
+    private static final long serialVersionUID = 4735066193941274186L;
+
+    transient EditorStateManager esm  = null;
+    transient boolean parametersProcessed = false;
+
+    @Override
+    public void cleanup() {
+        if (esm != null)
+            removeEventHandler(this);
+        super.cleanup();
+    }
+
+    @Override
+    public void render(Graphics2D g2d) {
+        if (!parametersProcessed) {
+            SingleElementNode sne = getSingleElementNode();
+            Boolean enableEditing = sne.getParameter("enableEditing");
+            if (enableEditing != null && enableEditing) {
+                esm = new EditorStateManager(this);
+                addEventHandler(this);
+            }
+            parametersProcessed = true;
+        }
+
+        super.render(g2d);
+    }
+
+    @Override
+    protected int dynamicHash() {
+        return esm != null ? esm.currentHash() : 0;
+    }
+
+    @Override
+    protected boolean applyAssignments(SVGDiagram diagram, List<SVGNodeAssignment> assignments) throws SVGException {
+        boolean changed = super.applyAssignments(diagram, assignments);
+        if (esm != null && !esm.applyEditMode(diagram))
+            diagram.updateTime(0);
+        return changed;
+    }
+
+    private boolean isSelected(IG2DNode node) {
+        ICanvasContext ctx = DiagramNodeUtil.getCanvasContext(this);
+        IElement ie = DiagramNodeUtil.getElement(ctx, node);
+        if (ie == null)
+            return false;
+        Selection sel = ctx.getAtMostOneItemOfClass(Selection.class);
+        if (sel != null) {
+            Set<IElement> elems = sel.getSelection(0);
+            if (elems.size() == 1 && elems.contains(ie))
+                return true;
+        }
+        return false;
+    }
+
+    private boolean isSelected() {
+        SingleElementNode sne = getSingleElementNode();
+        if (isSelected(sne))
+            return true;
+        INode n = sne.getParent();
+        while (n != null) {
+            if (isSelected((IG2DNode)n))
+                return true;
+            n = n.getParent();
+        }
+        return false;
+    }
+
+    @Override
+    protected boolean mouseClicked(MouseClickEvent e) {
+        if(esm != null) {
+            if(esm.isEditMode()) {
+                esm.applyEdit();
+                esm.deactivateEdit();
+                return true;
+            }
+            if(isSelected()) {
+                if(esm.tryToStartEditMode(diagramCache, e))
+                    return true;
+            }
+        }
+        return super.mouseClicked(e);
+    }
+
+    SingleElementNode getSingleElementNode() {
+        ICanvasContext ctx = DiagramNodeUtil.getCanvasContext(this);
+        // FIXME: needed only because eventdelegator registrations are done before adding node to scene graph.
+        if (ctx == null)
+            return null;
+        return (SingleElementNode)NodeUtil.getNearestParentOfType(this, SingleElementNode.class);
+    }
+
+    @Override
+    protected boolean keyPressed(KeyPressedEvent e) {
+        if (esm != null && esm.keyPressed(e))
+            return true;
+        return super.keyPressed(e);
+    }
+
+    @Override
+    protected boolean handleCommand(CommandEvent e) {
+        if (esm != null
+                && !esm.isEditMode()
+                && "org.eclipse.ui.edit.rename".equals(e.command.id)
+                && isSelected()
+                && esm.tryToStartEditMode(diagramCache)) {
+            return true;
+        }
+        return super.handleCommand(e);
+    }
+
+    @Override
+    public int getEventMask() {
+        return EventTypes.KeyPressedMask | EventTypes.MouseClickMask | EventTypes.CommandMask;
+    }
+
+}