Changeset 2759 in josm for trunk/src/org/openstreetmap/josm/actions/AutoScaleAction.java

Timestamp:

2010-01-07T19:29:53+01:00 (14 years ago)

Author:

mjulius

Message:

Make the new zoom previous and next actions listen to zoom changes and set enabled state.

File:

• trunk/src/org/openstreetmap/josm/actions/AutoScaleAction.java (modified) (3 diffs)

trunk/src/org/openstreetmap/josm/actions/AutoScaleAction.java

@@ -18 +18 @@
 import org.openstreetmap.josm.data.osm.OsmPrimitive;
 import org.openstreetmap.josm.data.osm.visitor.BoundingXYVisitor;
+import org.openstreetmap.josm.gui.MapView;
 import org.openstreetmap.josm.gui.dialogs.LayerListDialog;
 import org.openstreetmap.josm.gui.layer.Layer;
@@ -226 +227 @@
                 setEnabled(true);
             }
+        } else if ("previous".equals(mode)) {
+            setEnabled(Main.map != null && Main.map.mapView != null && Main.map.mapView.hasZoomUndoEntries());
+        } else if ("next".equals(mode)) {
+            setEnabled(Main.map != null && Main.map.mapView != null && Main.map.mapView.hasZoomRedoEntries());
         } else {
             setEnabled(
@@ -240 +245 @@
         }
     }
+
+    @Override
+    protected void installAdapters() {
+        super.installAdapters();
+        // make this action listen to zoom change events
+        //
+        zoomChangeAdapter = new ZoomChangeAdapter();
+        MapView.addZoomChangeListener(zoomChangeAdapter);
+        initEnabledState();
+    }
+
+    /**
+     * Adapter for selection change events
+     *
+     */
+    private class ZoomChangeAdapter implements MapView.ZoomChangeListener {
+        public void zoomChanged() {
+            updateEnabledState();
+        }
+    }
+
+    private ZoomChangeAdapter zoomChangeAdapter;
 }