X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.scenegraph%2Fsrc%2Forg%2Fsimantics%2Fscenegraph%2Fg2d%2Fsnap%2FGridSnapAdvisor.java;fp=bundles%2Forg.simantics.scenegraph%2Fsrc%2Forg%2Fsimantics%2Fscenegraph%2Fg2d%2Fsnap%2FGridSnapAdvisor.java;h=3b265f3097bd6ff0ecc892bc22d2f4733fbfcf9a;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git

diff --git a/bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/g2d/snap/GridSnapAdvisor.java b/bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/g2d/snap/GridSnapAdvisor.java
new file mode 100644
index 000000000..3b265f309
--- /dev/null
+++ b/bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/g2d/snap/GridSnapAdvisor.java
@@ -0,0 +1,88 @@
+/*******************************************************************************
+ * 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.snap;
+
+import java.awt.geom.Point2D;
+import java.io.Serializable;
+
+import org.simantics.scl.runtime.function.Function1;
+
+/**
+ * @author Tuukka Lehtonen
+ */
+public class GridSnapAdvisor implements ISnapAdvisor, Serializable {
+
+    private static final long serialVersionUID = 2411311098028229134L;
+
+    double resolution;
+    Function1<Object, Boolean> enabled;
+
+    public GridSnapAdvisor(double resolution) {
+        this.resolution = resolution;
+    }
+
+    public void setEnabledFunction(Function1<Object, Boolean> function) {
+        this.enabled = function;
+    }
+
+    public void setResolution(double resolution) {
+        this.resolution = resolution;
+    }
+    
+    public double getResolution() {
+    	return resolution;
+    }
+
+    @Override
+    public void snap(Point2D point) {
+        if (enabled != null && !enabled.apply(null))
+            return;
+        point.setLocation(
+            Math.round(point.getX() / resolution) * resolution, 
+            Math.round(point.getY() / resolution) * resolution);
+    }
+
+    @Override
+    public void snap(Point2D point, Point2D[] features) {
+        if (enabled != null && !enabled.apply(null))
+            return;
+        double dx = features[0].getX();
+        double dy = features[0].getY();
+        point.setLocation(
+            Math.round((point.getX()-dx) / resolution) * resolution + dx, 
+            Math.round((point.getY()-dy) / resolution) * resolution + dy);
+    }
+
+    @Override
+    public String toString() {
+        return getClass().getSimpleName() + "[resolution=" + resolution + "]";
+    }
+
+    @Override
+    public int hashCode() {
+        long temp = Double.doubleToLongBits(resolution);
+        return (int) (temp ^ (temp >>> 32));
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (getClass() != obj.getClass())
+            return false;
+        GridSnapAdvisor other = (GridSnapAdvisor) obj;
+        return Double.doubleToLongBits(resolution) != Double.doubleToLongBits(other.resolution);
+    }
+
+}