Changeset 3116 in josm for trunk/src/org/openstreetmap/josm/gui/NavigatableComponent.java

Timestamp:

2010-03-11T21:01:49+01:00 (14 years ago)

Author:

jttt

Message:

Reuse offscreenBuffer if layers didn't change

File:

• trunk/src/org/openstreetmap/josm/gui/NavigatableComponent.java (modified) (1 diff)

trunk/src/org/openstreetmap/josm/gui/NavigatableComponent.java

@@ -679 +679 @@
         return n.substring(n.lastIndexOf('.')+1);
     }
+
+    /**
+     * Return a ID which is unique as long as viewport dimensions are the same
+     */
+    public int getViewID() {
+        String x = center.east() + "_" + center.north() + "_" + scale + "_" +
+        getWidth() + "_" + getHeight() + "_" + getProjection().toString();
+        java.util.zip.CRC32 id = new java.util.zip.CRC32();
+        id.update(x.getBytes());
+        return (int)id.getValue();
+    }
 }