01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: */
17:
18: package java.awt;
19:
20: import java.awt.dnd.DnDConstants;
21: import java.awt.dnd.DragGestureListener;
22: import java.awt.dnd.DragSource;
23: import java.awt.dnd.MouseDragGestureRecognizer;
24: import java.awt.event.InputEvent;
25: import java.awt.event.MouseEvent;
26: import java.util.ArrayList;
27:
28: class DefaultMouseDragGestureRecognizer extends
29: MouseDragGestureRecognizer {
30: private boolean active;
31:
32: protected DefaultMouseDragGestureRecognizer(DragSource ds,
33: Component c, int act, DragGestureListener dgl) {
34: super (ds, c, act, dgl);
35: events = new ArrayList<InputEvent>();
36: }
37:
38: @Override
39: public void mousePressed(MouseEvent e) {
40: events.add(e);
41: }
42:
43: @Override
44: public void mouseDragged(MouseEvent e) {
45: if (active) {
46: return;
47: }
48: events.add(e);
49: int distance = 2; // TODO: use desktop property
50: MouseEvent e0 = (MouseEvent) events.get(0);
51: if (e0.getPoint().distance(e.getPoint()) >= distance) {
52: if (sourceActions != DnDConstants.ACTION_NONE) {
53: active = true;
54: fireDragGestureRecognized(sourceActions, e.getPoint());
55: }
56: }
57: }
58:
59: @Override
60: public void mouseReleased(MouseEvent e) {
61: active = false;
62: }
63: }
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