Changeset 6157

Timestamp:

2003-12-08T14:33:53+13:00 (20 years ago)

Author:

jmt12

Message:

Added functionality so that an invalid drop changes the cursor - but oh god do I have to design a new cursor rather than the behemoth Swing uses

File:

• trunk/gli/src/org/greenstone/gatherer/gui/tree/DragTree.java (modified) (7 diffs)

trunk/gli/src/org/greenstone/gatherer/gui/tree/DragTree.java

@@ -50 +50 @@
     /** The last tree path the drag was hovered over. */
     private TreePath previous_path = null;
+
+    static private Cursor NO_DRAG_CURSOR = null;
+
     static private final Color TRANSPARENT_COLOR = new Color(0,0,0,0);
     /** The distance from the edge of the current view within the scroll bar which if entered causes the view to scroll. */
@@ -73 +76 @@
 
     public void init(String name, String background_name, boolean mixed_selection) {
+    if(NO_DRAG_CURSOR == null) {
+        NO_DRAG_CURSOR = DragSource.DefaultMoveNoDrop;
+        //Image image = (Utility.getImage("no_drag_cursor.gif")).getImage();
+        //Point hot_spot = new Point(1,1);
+        //NO_DRAG_CURSOR = Toolkit.getDefaultToolkit().createCustomCursor(image, hot_spot, "No_Drag_Cursor");
+    }
+
     // Init
     this.name = name;
@@ -207 +217 @@
     }
     if (!isValidDrag()) {
+        try {
+        event.startDrag(NO_DRAG_CURSOR, new StringSelection("dummy"), this);
+        //dragging = true;
+        }
+        catch(Exception error) {
+        error.printStackTrace();
+        }
         return;
     }
@@ -249 +266 @@
         label = null;
         try {
-        event.startDrag(new Cursor(Cursor.DEFAULT_CURSOR), group.image_ghost, new Point(5,5), new StringSelection("dummy"), this);
+        event.startDrag(new Cursor(Cursor.DEFAULT_CURSOR), group.image_ghost, group.mouse_offset, new StringSelection("dummy"), this);
         //dragging = true;
         }
@@ -278 +295 @@
     }
     pt_last = pt;
-    if(!DragSource.isDragImageSupported()) {
+    if(!DragSource.isDragImageSupported() && group.image_ghost != null) {
         // Erase the last ghost image and cue line
         paintImmediately(ra_ghost.getBounds());
@@ -344 +361 @@
         ///ystem.err.println("Valid drop.");
         TreePath[] selection = group.getSelection();
-        if(target != null) {
+        if(target != null && selection != null) {
             FileNode[] source_nodes = new FileNode[selection.length];
             for(int i = 0; i < source_nodes.length; i++) {
@@ -361 +378 @@
     paintImmediately(ra_ghost.getBounds());
     event.getDropTargetContext().dropComplete(true);
+    group.image_ghost = null;
     }