X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.scenegraph%2Fsrc%2Forg%2Fsimantics%2Fscenegraph%2Fg2d%2Fnodes%2FSelectionNode.java;fp=bundles%2Forg.simantics.scenegraph%2Fsrc%2Forg%2Fsimantics%2Fscenegraph%2Fg2d%2Fnodes%2FSelectionNode.java;h=3939e1c1c5644ce759f632b56313010e0e111bf5;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git

diff --git a/bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/g2d/nodes/SelectionNode.java b/bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/g2d/nodes/SelectionNode.java
new file mode 100644
index 000000000..3939e1c1c
--- /dev/null
+++ b/bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/g2d/nodes/SelectionNode.java
@@ -0,0 +1,92 @@
+/*******************************************************************************
+ * 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.scenegraph.g2d.nodes;
+
+import java.awt.BasicStroke;
+import java.awt.Color;
+import java.awt.Graphics2D;
+import java.awt.geom.AffineTransform;
+import java.awt.geom.Rectangle2D;
+
+import org.simantics.scenegraph.g2d.G2DNode;
+import org.simantics.scenegraph.utils.GeometryUtils;
+
+public class SelectionNode extends G2DNode implements Decoration {
+    /**
+     * 
+     */
+    private static final long serialVersionUID = -2879575230419873230L;
+
+    public transient static final BasicStroke SELECTION_STROKE = new BasicStroke(1.0f,
+            BasicStroke.CAP_SQUARE, BasicStroke.CAP_SQUARE, 10.0f,
+            new float[] { 5.0f, 5.0f }, 0.0f);
+
+    protected Rectangle2D bounds = null;
+    protected Color color = null;
+    protected transient Rectangle2D rect;
+    protected transient BasicStroke scaledStroke;
+    protected transient double previousScaleRecip = Double.NaN;
+
+    @SyncField({"transform", "bounds", "color"})
+    public void init(AffineTransform transform, Rectangle2D bounds, Color color) {
+        this.transform = transform;
+        this.bounds = bounds;
+        this.color = color;
+    }
+
+    @Override
+    public void render(Graphics2D g) {
+        if (bounds == null) return;
+
+        // Prevent exceptions during rendering.
+        if (transform.getDeterminant() == 0)
+            return;
+
+        AffineTransform ot = g.getTransform();
+
+        g.setColor(color);
+        g.transform(transform);
+
+        AffineTransform tx = g.getTransform();
+        //System.out.println("tx: " + tx);
+        double scale = GeometryUtils.getScale(tx);
+        //System.out.println("scale: " + scale);
+        double scaleRecip = 1.0 / scale;
+        //System.out.println("scale: " + scaleRecip);
+
+        // Prevent stroke reallocation while panning.
+        // Zooming will trigger reallocation.
+        if (scaledStroke == null || scaleRecip != previousScaleRecip) {
+            scaledStroke = GeometryUtils.scaleStroke( SELECTION_STROKE, (float) scaleRecip);
+            previousScaleRecip = scaleRecip;
+        }
+        g.setStroke(scaledStroke);
+
+        double padding = 5.0 * scaleRecip;
+        double paddingX = padding;
+        double paddingY = padding;
+
+        if (rect == null)
+            rect = new Rectangle2D.Double();
+        rect.setFrame(bounds.getMinX() - paddingX, bounds.getMinY() - paddingY,
+                bounds.getWidth() + 2.0*paddingX, bounds.getHeight() + 2.0*paddingY);
+        g.draw(rect);
+        
+        g.setTransform(ot);
+
+    }
+
+    @Override
+    public Rectangle2D getBoundsInLocal() {
+        return bounds;
+    }
+}