Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.scenegraph / src / org / simantics / scenegraph / g2d / nodes / GridNode.java

diff --git a/bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/g2d/nodes/GridNode.java b/bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/g2d/nodes/GridNode.java
new file mode 100644 (file)
index 0000000..b3878d4
--- /dev/null
+++ b/bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/g2d/nodes/GridNode.java
@@ -0,0 +1,152 @@
+/*******************************************************************************\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.scenegraph.g2d.nodes;
+
+import java.awt.BasicStroke;\r
+import java.awt.Color;\r
+import java.awt.Graphics2D;\r
+import java.awt.geom.AffineTransform;\r
+import java.awt.geom.Rectangle2D;\r
+\r
+import org.simantics.scenegraph.g2d.G2DNode;\r
+import org.simantics.scenegraph.g2d.snap.ISnapAdvisor;\r
+import org.simantics.scenegraph.utils.GridUtils;\r
+
+/**\r
+ * @author Tuukka Lehtonen\r
+ */\r
+public class GridNode extends G2DNode {
+\r
+    /**\r
+     * Used for naming and identifying (see {@link #setLookupId(String)})\r
+     * GridNode instances in scene graphs.\r
+     */\r
+    public static final String          GRID_NODE_ID     = "grid";\r
+    \r
+    private static final long           serialVersionUID = -624916761394994358L;\r
+\r
+    protected Boolean                   enabled          = true;\r
+\r
+    protected Color                     gridColor        = new Color(0.9f, 0.9f, 0.9f);\r
+\r
+    protected double                    gridSize         = 1.0;\r
+\r
+    protected ISnapAdvisor              snapAdvisor;\r
+\r
+    private transient final BasicStroke stroke           = new BasicStroke(1);\r
+\r
+    @SyncField("enabled")\r
+    public void setEnabled(Boolean enabled) {\r
+        this.enabled = enabled;\r
+    }\r
+\r
+    @SyncField("gridColor")\r
+    public void setGridColor(Color color) {\r
+        this.gridColor = color;\r
+    }\r
+\r
+    @SyncField("gridSize")\r
+    public void setGridSize(double gridSize) {\r
+        if (gridSize < 1e-6)\r
+            gridSize = 1e-6;\r
+        this.gridSize = gridSize;\r
+    }\r
+\r
+    @SyncField("snapAdvisor")\r
+    public void setSnapAdvisor(ISnapAdvisor snapAdvisor) {\r
+        this.snapAdvisor = snapAdvisor;\r
+    }\r
+\r
+    public double getGridSize() {\r
+        return gridSize;\r
+    }\r
+\r
+    public ISnapAdvisor getSnapAdvisor() {\r
+        return snapAdvisor;\r
+    }\r
+
+    @Override
+    public void render(Graphics2D g2d) {
+        if (!enabled)\r
+            return;\r
+\r
+        AffineTransform ot = g2d.getTransform();\r
+        
+        double scaleX = Math.abs(ot.getScaleX());
+        double scaleY = Math.abs(ot.getScaleY());
+        if (scaleX <= 0 || scaleY <= 0) {
+            // Make sure that we don't end up in an eternal loop below.
+            return;
+        }\r
+
+        double offsetX = ot.getTranslateX();
+        double offsetY = ot.getTranslateY();
+        g2d.setTransform(new AffineTransform());
+
+        //g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
+        g2d.setStroke(stroke);\r
+        if (gridColor != null)\r
+            g2d.setColor(gridColor);
+
+        Rectangle2D bounds = g2d.getClipBounds();
+        if (bounds == null)\r
+            return; // FIXME
+
+        double stepX = 50;
+        double stepY = 50;
+\r
+        //System.out.println("scales : " + scaleX + ", " + scaleY);\r
+\r
+        stepX = GridUtils.limitedEvenGridSpacing(stepX, scaleX, 100, gridSize, true);\r
+        stepY = GridUtils.limitedEvenGridSpacing(stepY, scaleY, 100, gridSize, true);\r
+\r
+        //System.out.println("steps 1: " + stepX + ", " + stepY);\r
+\r
+        while(stepX * scaleX < 50) stepX *= 2;
+        while(stepY * scaleY < 50) stepY *= 2;
+\r
+        //System.out.println("steps 2: " + stepX + ", " + stepY);\r
+\r
+        if (stepX < gridSize*5)\r
+            stepX = gridSize*5;\r
+        if (stepY < gridSize*5)\r
+            stepY = gridSize*5;\r
+\r
+        //System.out.println("steps 2.1: " + stepX + ", " + stepY);\r
+
+        stepX *= scaleX;
+        stepY *= scaleY;
+\r
+        //System.out.println("steps 3: " + stepX + ", " + stepY);\r
+
+        stepX /= 5;
+        stepY /= 5;
+\r
+        //System.out.println("steps 4: " + stepX + ", " + stepY);\r
+
+        for(double x = offsetX%stepX; x < bounds.getMaxX(); x+=stepX) {
+            g2d.drawLine((int)x, (int)bounds.getMinY(), (int)x, (int)bounds.getMaxY());
+        }
+
+        for(double y = offsetY%stepY; y < bounds.getMaxY(); y+=stepY) {
+            g2d.drawLine((int)bounds.getMinX(), (int)y, (int)bounds.getMaxX(), (int)y);
+        }
+
+        g2d.setTransform(ot);
+    }
+\r
+    @Override
+    public Rectangle2D getBoundsInLocal() {
+        return null;
+    }
+
+}