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 javax.swing;
27
28 import java.awt.*;
29 import java.awt.event.*;
30
31 /**
32 * Autoscroller is responsible for generating synthetic mouse dragged
33 * events. It is the responsibility of the Component (or its MouseListeners)
34 * that receive the events to do the actual scrolling in response to the
35 * mouse dragged events.
36 *
37 * @author Dave Moore
38 * @author Scott Violet
39 */
40 class Autoscroller implements ActionListener {
41 /**
42 * Global Autoscroller.
43 */
44 private static Autoscroller sharedInstance = new Autoscroller();
45
46 // As there can only ever be one autoscroller active these fields are
47 // static. The Timer is recreated as necessary to target the appropriate
48 // Autoscroller instance.
49 private static MouseEvent event;
50 private static Timer timer;
80 }
81
82 /**
83 * Starts the timer targeting the passed in component.
84 */
85 @SuppressWarnings("deprecation")
86 private void start(JComponent c, MouseEvent e) {
87 Point screenLocation = c.getLocationOnScreen();
88
89 if (component != c) {
90 _stop(component);
91 }
92 component = c;
93 event = new MouseEvent(component, e.getID(), e.getWhen(),
94 e.getModifiers(), e.getX() + screenLocation.x,
95 e.getY() + screenLocation.y,
96 e.getXOnScreen(),
97 e.getYOnScreen(),
98 e.getClickCount(), e.isPopupTrigger(),
99 MouseEvent.NOBUTTON);
100
101 if (timer == null) {
102 timer = new Timer(100, this);
103 }
104
105 if (!timer.isRunning()) {
106 timer.start();
107 }
108 }
109
110 //
111 // Methods mirror the public static API
112 //
113
114 /**
115 * Stops scrolling for the passed in widget.
116 */
117 private void _stop(JComponent c) {
118 if (component == c) {
119 if (timer != null) {
158 * if necessary.
159 */
160 @SuppressWarnings("deprecation")
161 public void actionPerformed(ActionEvent x) {
162 JComponent component = Autoscroller.component;
163
164 if (component == null || !component.isShowing() || (event == null)) {
165 _stop(component);
166 return;
167 }
168 Point screenLocation = component.getLocationOnScreen();
169 MouseEvent e = new MouseEvent(component, event.getID(),
170 event.getWhen(), event.getModifiers(),
171 event.getX() - screenLocation.x,
172 event.getY() - screenLocation.y,
173 event.getXOnScreen(),
174 event.getYOnScreen(),
175 event.getClickCount(),
176 event.isPopupTrigger(),
177 MouseEvent.NOBUTTON);
178 component.superProcessMouseMotionEvent(e);
179 }
180
181 }
|
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 javax.swing;
27
28 import java.awt.*;
29 import java.awt.event.*;
30
31 import sun.awt.AWTAccessor;
32 import sun.awt.AWTAccessor.MouseEventAccessor;
33
34 /**
35 * Autoscroller is responsible for generating synthetic mouse dragged
36 * events. It is the responsibility of the Component (or its MouseListeners)
37 * that receive the events to do the actual scrolling in response to the
38 * mouse dragged events.
39 *
40 * @author Dave Moore
41 * @author Scott Violet
42 */
43 class Autoscroller implements ActionListener {
44 /**
45 * Global Autoscroller.
46 */
47 private static Autoscroller sharedInstance = new Autoscroller();
48
49 // As there can only ever be one autoscroller active these fields are
50 // static. The Timer is recreated as necessary to target the appropriate
51 // Autoscroller instance.
52 private static MouseEvent event;
53 private static Timer timer;
83 }
84
85 /**
86 * Starts the timer targeting the passed in component.
87 */
88 @SuppressWarnings("deprecation")
89 private void start(JComponent c, MouseEvent e) {
90 Point screenLocation = c.getLocationOnScreen();
91
92 if (component != c) {
93 _stop(component);
94 }
95 component = c;
96 event = new MouseEvent(component, e.getID(), e.getWhen(),
97 e.getModifiers(), e.getX() + screenLocation.x,
98 e.getY() + screenLocation.y,
99 e.getXOnScreen(),
100 e.getYOnScreen(),
101 e.getClickCount(), e.isPopupTrigger(),
102 MouseEvent.NOBUTTON);
103 MouseEventAccessor meAccessor = AWTAccessor.getMouseEventAccessor();
104 meAccessor.setCausedByTouchEvent(event,
105 meAccessor.isCausedByTouchEvent(e));
106
107 if (timer == null) {
108 timer = new Timer(100, this);
109 }
110
111 if (!timer.isRunning()) {
112 timer.start();
113 }
114 }
115
116 //
117 // Methods mirror the public static API
118 //
119
120 /**
121 * Stops scrolling for the passed in widget.
122 */
123 private void _stop(JComponent c) {
124 if (component == c) {
125 if (timer != null) {
164 * if necessary.
165 */
166 @SuppressWarnings("deprecation")
167 public void actionPerformed(ActionEvent x) {
168 JComponent component = Autoscroller.component;
169
170 if (component == null || !component.isShowing() || (event == null)) {
171 _stop(component);
172 return;
173 }
174 Point screenLocation = component.getLocationOnScreen();
175 MouseEvent e = new MouseEvent(component, event.getID(),
176 event.getWhen(), event.getModifiers(),
177 event.getX() - screenLocation.x,
178 event.getY() - screenLocation.y,
179 event.getXOnScreen(),
180 event.getYOnScreen(),
181 event.getClickCount(),
182 event.isPopupTrigger(),
183 MouseEvent.NOBUTTON);
184 MouseEventAccessor meAccessor = AWTAccessor.getMouseEventAccessor();
185 meAccessor.setCausedByTouchEvent(e,
186 meAccessor.isCausedByTouchEvent(event));
187 component.superProcessMouseMotionEvent(e);
188 }
189
190 }
|