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 getPlatformScaleX() {
50 View view = scene.getPlatformView();
51 if (view != null) {
52 Window w = view.getWindow();
53 if (w != null) {
54 return w.getPlatformScaleX();
55 }
56 }
57 return 1.0;
58 }
59
60 private double getPlatformScaleY() {
61 View view = scene.getPlatformView();
62 if (view != null) {
63 Window w = view.getWindow();
64 if (w != null) {
65 return w.getPlatformScaleY();
66 }
67 }
68 return 1.0;
69 }
70
71 public TransferMode handleDragEnter(final int x, final int y, final int xAbs, final int yAbs,
72 final TransferMode recommendedTransferMode,
73 final ClipboardAssistance dropTargetAssistant)
74 {
75 assert Platform.isFxApplicationThread();
76 return AccessController.doPrivileged((PrivilegedAction<TransferMode>) () -> {
77 if (scene.dropTargetListener != null) {
78 double pScaleX = getPlatformScaleX();
79 double pScaleY = getPlatformScaleY();
80 QuantumClipboard dragboard =
81 QuantumClipboard.getDragboardInstance(dropTargetAssistant, false);
82 return scene.dropTargetListener.dragEnter(x / pScaleX, y / pScaleY, xAbs / pScaleX, yAbs / pScaleY,
83 recommendedTransferMode, dragboard);
84 }
85 return null;
86 }, scene.getAccessControlContext());
87 }
88
89 public void handleDragLeave(final ClipboardAssistance dropTargetAssistant) {
90 assert Platform.isFxApplicationThread();
91 AccessController.doPrivileged((PrivilegedAction<Void>) () -> {
92 if (scene.dropTargetListener != null) {
93 scene.dropTargetListener.dragExit(0, 0, 0, 0);
94 }
95 return null;
96 }, scene.getAccessControlContext());
97 }
98
99 public TransferMode handleDragDrop(final int x, final int y, final int xAbs, final int yAbs,
100 final TransferMode recommendedTransferMode,
101 final ClipboardAssistance dropTargetAssistant)
102 {
103 assert Platform.isFxApplicationThread();
104 return AccessController.doPrivileged((PrivilegedAction<TransferMode>) () -> {
105 if (scene.dropTargetListener != null) {
106 double pScaleX = getPlatformScaleX();
107 double pScaleY = getPlatformScaleY();
108 return scene.dropTargetListener.drop(x / pScaleX, y / pScaleY, xAbs / pScaleX, yAbs / pScaleY,
109 recommendedTransferMode);
110 }
111 return null;
112 }, scene.getAccessControlContext());
113 }
114
115 public TransferMode handleDragOver(final int x, final int y, final int xAbs, final int yAbs,
116 final TransferMode recommendedTransferMode,
117 final ClipboardAssistance dropTargetAssistant)
118 {
119 assert Platform.isFxApplicationThread();
120 return AccessController.doPrivileged((PrivilegedAction<TransferMode>) () -> {
121 if (scene.dropTargetListener != null) {
122 double pScaleX = getPlatformScaleX();
123 double pScaleY = getPlatformScaleY();
124 return scene.dropTargetListener.dragOver(x / pScaleX, y / pScaleY, xAbs / pScaleX, yAbs / pScaleY,
125 recommendedTransferMode);
126 }
127 return null;
128 }, scene.getAccessControlContext());
129 }
130
131 // Drag source handlers
132
133 // This is a callback from the native platform, when a drag gesture is
134 // detected. This mechanism is currently not used in FX, as we have
135 // a custom gesture recognizer in Scene, and DnD is started with
136 // Toolkit.startDrag().
137 public void handleDragStart(final int button, final int x, final int y, final int xAbs, final int yAbs,
138 final ClipboardAssistance dragSourceAssistant)
139 {
140 assert Platform.isFxApplicationThread();
141 AccessController.doPrivileged((PrivilegedAction<Void>) () -> {
142 if (scene.dragGestureListener != null) {
143 double pScaleX = getPlatformScaleX();
144 double pScaleY = getPlatformScaleY();
145 QuantumClipboard dragboard =
146 QuantumClipboard.getDragboardInstance(dragSourceAssistant, true);
147 scene.dragGestureListener.dragGestureRecognized(
148 x / pScaleX, y / pScaleY, xAbs / pScaleX, yAbs / pScaleY, button, dragboard);
149 }
150 return null;
151 }, scene.getAccessControlContext());
152 }
153
154 // This is a callback from the native platform, when the drag was started
155 // from handleDragStart() above, or when FX as a drag source is embedded
156 // to Swing/SWT.
157 public void handleDragEnd(final TransferMode performedTransferMode,
158 final ClipboardAssistance dragSourceAssistant)
159 {
160 assert Platform.isFxApplicationThread();
161 AccessController.doPrivileged((PrivilegedAction<Void>) () -> {
162 try {
163 if (scene.dragSourceListener != null) {
164 scene.dragSourceListener.dragDropEnd(0, 0, 0, 0, performedTransferMode);
165 }
166 } finally {
167 QuantumClipboard.releaseCurrentDragboard();
168 }
169 return null;
170 }, scene.getAccessControlContext());
171 }
172
173 }