1 /*
2 * Copyright (c) 2012, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package com.sun.javafx.tk.quantum;
27
28 import javafx.application.Platform;
29
30 import javafx.scene.input.TransferMode;
31
32 import com.sun.glass.ui.ClipboardAssistance;
33 import com.sun.glass.ui.View;
34 import com.sun.glass.ui.Window;
35
36 import java.security.AccessController;
37 import java.security.PrivilegedAction;
38
39 class GlassSceneDnDEventHandler {
40
41 private final GlassScene scene;
42
43 public GlassSceneDnDEventHandler(final GlassScene scene) {
44 this.scene = scene;
45 }
46
47 // Drop target handlers
48
49 private double getPlatformScale() {
50 View view = scene.getPlatformView();
51 if (view != null) {
52 Window w = view.getWindow();
53 if (w != null) {
54 return w.getPlatformScale();
55 }
56 }
57 return 1.0;
58 }
59
60 public TransferMode handleDragEnter(final int x, final int y, final int xAbs, final int yAbs,
61 final TransferMode recommendedTransferMode,
62 final ClipboardAssistance dropTargetAssistant)
63 {
64 assert Platform.isFxApplicationThread();
65 return AccessController.doPrivileged((PrivilegedAction<TransferMode>) () -> {
66 if (scene.dropTargetListener != null) {
67 double pScale = getPlatformScale();
68 QuantumClipboard dragboard =
69 QuantumClipboard.getDragboardInstance(dropTargetAssistant, false);
70 return scene.dropTargetListener.dragEnter(x / pScale, y / pScale, xAbs / pScale, yAbs / pScale,
71 recommendedTransferMode, dragboard);
72 }
73 return null;
74 }, scene.getAccessControlContext());
75 }
76
77 public void handleDragLeave(final ClipboardAssistance dropTargetAssistant) {
78 assert Platform.isFxApplicationThread();
79 AccessController.doPrivileged((PrivilegedAction<Void>) () -> {
80 if (scene.dropTargetListener != null) {
81 scene.dropTargetListener.dragExit(0, 0, 0, 0);
82 }
83 return null;
84 }, scene.getAccessControlContext());
85 }
86
87 public TransferMode handleDragDrop(final int x, final int y, final int xAbs, final int yAbs,
88 final TransferMode recommendedTransferMode,
89 final ClipboardAssistance dropTargetAssistant)
90 {
91 assert Platform.isFxApplicationThread();
92 return AccessController.doPrivileged((PrivilegedAction<TransferMode>) () -> {
93 if (scene.dropTargetListener != null) {
94 double pScale = getPlatformScale();
95 return scene.dropTargetListener.drop(x / pScale, y / pScale, xAbs / pScale, yAbs / pScale,
96 recommendedTransferMode);
97 }
98 return null;
99 }, scene.getAccessControlContext());
100 }
101
102 public TransferMode handleDragOver(final int x, final int y, final int xAbs, final int yAbs,
103 final TransferMode recommendedTransferMode,
104 final ClipboardAssistance dropTargetAssistant)
105 {
106 assert Platform.isFxApplicationThread();
107 return AccessController.doPrivileged((PrivilegedAction<TransferMode>) () -> {
108 if (scene.dropTargetListener != null) {
109 double pScale = getPlatformScale();
110 return scene.dropTargetListener.dragOver(x / pScale, y / pScale, xAbs / pScale, yAbs / pScale,
111 recommendedTransferMode);
112 }
113 return null;
114 }, scene.getAccessControlContext());
115 }
116
117 // Drag source handlers
118
119 // This is a callback from the native platform, when a drag gesture is
120 // detected. This mechanism is currently not used in FX, as we have
121 // a custom gesture recognizer in Scene, and DnD is started with
122 // Toolkit.startDrag().
123 public void handleDragStart(final int button, final int x, final int y, final int xAbs, final int yAbs,
124 final ClipboardAssistance dragSourceAssistant)
125 {
126 assert Platform.isFxApplicationThread();
127 AccessController.doPrivileged((PrivilegedAction<Void>) () -> {
128 if (scene.dragGestureListener != null) {
129 double pScale = getPlatformScale();
130 QuantumClipboard dragboard =
131 QuantumClipboard.getDragboardInstance(dragSourceAssistant, true);
132 scene.dragGestureListener.dragGestureRecognized(
133 x / pScale, y / pScale, xAbs / pScale, yAbs / pScale, button, dragboard);
134 }
135 return null;
136 }, scene.getAccessControlContext());
137 }
138
139 // This is a callback from the native platform, when the drag was started
140 // from handleDragStart() above, or when FX as a drag source is embedded
141 // to Swing/SWT.
142 public void handleDragEnd(final TransferMode performedTransferMode,
143 final ClipboardAssistance dragSourceAssistant)
144 {
145 assert Platform.isFxApplicationThread();
146 AccessController.doPrivileged((PrivilegedAction<Void>) () -> {
147 try {
148 if (scene.dragSourceListener != null) {
149 scene.dragSourceListener.dragDropEnd(0, 0, 0, 0, performedTransferMode);
150 }
151 } finally {
152 QuantumClipboard.releaseCurrentDragboard();
153 }
154 return null;
155 }, scene.getAccessControlContext());
156 }
157
158 }