bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/g2d/nodes/SelectionNode.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.scenegraph.g2d.nodes;
  13
  14 import java.awt.AlphaComposite;
  15 import java.awt.BasicStroke;
  16 import java.awt.Color;
  17 import java.awt.Composite;
  18 import java.awt.Graphics2D;
  19 import java.awt.geom.AffineTransform;
  20 import java.awt.geom.Rectangle2D;
  21
  22 import org.simantics.scenegraph.g2d.G2DNode;
  23 import org.simantics.scenegraph.utils.GeometryUtils;
  24
  25 public class SelectionNode extends G2DNode implements Decoration {
  26     /**
  27      *
  28      */
  29     private static final long serialVersionUID = -2879575230419873230L;
  30
  31     public transient static final BasicStroke SELECTION_STROKE = new BasicStroke(1.0f,
  32             BasicStroke.CAP_SQUARE, BasicStroke.CAP_SQUARE, 10.0f,
  33             new float[] { 5.0f, 5.0f }, 0.0f);
  34
  35     protected Rectangle2D bounds = null;
  36     protected Color color = null;
  37     protected transient Rectangle2D rect;
  38     protected transient BasicStroke scaledStroke;
  39     protected transient double previousScaleRecip = Double.NaN;
  40     protected boolean ignore = false;
  41     protected double paddingFactor = 5.0;
  42     protected int selectionId;
  43
  44     public int getSelectionId() {
  45         return selectionId;
  46     }
  47
  48     public void setIgnore(boolean value) {
  49         ignore = value;
  50     }
  51
  52     public void setPaddingFactor(double factor) {
  53         paddingFactor = factor;
  54     }
  55
  56     @SyncField({"transform", "bounds", "color"})
  57     public void init(int selectionId, AffineTransform transform, Rectangle2D bounds, Color color) {
  58         this.selectionId = selectionId;
  59         this.transform = transform;
  60         this.bounds = bounds;
  61         this.color = color;
  62     }
  63
  64     public void init(AffineTransform transform, Rectangle2D bounds, Color color) {
  65         init(0, transform, bounds, color);
  66     }
  67
  68     @Override
  69     public void render(Graphics2D g) {
  70         if (bounds == null) return;
  71
  72         if (ignore) return;
  73
  74         // Prevent exceptions during rendering.
  75         if (transform.getDeterminant() == 0)
  76             return;
  77
  78         AffineTransform ot = g.getTransform();
  79
  80         g.setColor(color);
  81         g.transform(transform);
  82
  83         AffineTransform tx = g.getTransform();
  84         //System.out.println("tx: " + tx);
  85         double scale = GeometryUtils.getScale(tx);
  86         //System.out.println("scale: " + scale);
  87         double scaleRecip = 1.0 / scale;
  88         //System.out.println("scale: " + scaleRecip);
  89
  90         // Prevent stroke reallocation while panning.
  91         // Zooming will trigger reallocation.
  92         if (scaledStroke == null || scaleRecip != previousScaleRecip) {
  93             scaledStroke = GeometryUtils.scaleStroke( SELECTION_STROKE, (float) scaleRecip);
  94             previousScaleRecip = scaleRecip;
  95         }
  96         g.setStroke(scaledStroke);
  97
  98         double padding = paddingFactor * scaleRecip;
  99         double paddingX = padding;
 100         double paddingY = padding;
 101
 102         if (rect == null)
 103             rect = new Rectangle2D.Double();
 104         rect.setFrame(bounds.getMinX() - paddingX, bounds.getMinY() - paddingY,
 105                 bounds.getWidth() + 2.0*paddingX, bounds.getHeight() + 2.0*paddingY);
 106         g.draw(rect);
 107
 108         g.setTransform(ot);
 109
 110     }
 111
 112     public Rectangle2D getRect() {
 113         return transform.createTransformedShape(rect).getBounds2D();
 114     }
 115
 116     @Override
 117     public Rectangle2D getBoundsInLocal() {
 118         return bounds;
 119     }
 120 }