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1
19
20 package org.netbeans.core.windows.view.ui.slides;
21
22 import java.awt.AWTEvent  ;
23 import java.awt.Component ;
24 import java.awt.Cursor ;
25 import java.awt.Point ;
26 import java.awt.Toolkit ;
27 import java.awt.event.AWTEventListener ;
28 import java.awt.event.MouseAdapter ;
29 import java.awt.event.MouseEvent ;
30 import java.awt.event.MouseListener ;
31 import java.awt.event.MouseMotionListener ;
32 import javax.swing.JComponent ;
33 import javax.swing.JPanel ;
34 import javax.swing.JRootPane ;
35 import javax.swing.SwingUtilities ;
36 import org.netbeans.core.windows.Constants;
37
38
42 public class ResizeGestureRecognizer implements AWTEventListener {
43
44
45
46 void attachResizeRecognizer(String side, Component component) {
47 update(side, component);
48 Toolkit.getDefaultToolkit().addAWTEventListener(this, AWTEvent.MOUSE_MOTION_EVENT_MASK | AWTEvent.MOUSE_EVENT_MASK);
49 }
50 void detachResizeRecognizer(String side, Component component) {
51 Toolkit.getDefaultToolkit().removeAWTEventListener(this);
52 update(null, null);
53 }
54
55
56 static final int RESIZE_BUFFER = 8;
57 private boolean isResizing = false;
58 private Component comp;
59 private String side;
60 private CommandManager mgr;
61
62 private GlassPane glass;
63 private Component oldGlass;
64
65 private int state;
66 private Point startPoint;
67 private static final int STATE_NOOP = 0;
68 private static final int STATE_START = 1;
69 private static final int STATE_DRAGGING = 2;
70
71
72 public ResizeGestureRecognizer(CommandManager mgr) {
73 this.mgr = mgr;
74 glass = new GlassPane();
75 }
76
77 public void update(String side, Component component) {
78 this.side = side;
79 comp = component;
80 state = STATE_NOOP;
81 resetState();
82 }
83
84 private boolean isInResizeArea(MouseEvent event) {
85 if (comp == null || side == null) {
86 return false;
87 }
88 Point leftTop = new Point (0, 0);
89 leftTop = SwingUtilities.convertPoint(comp, leftTop, SwingUtilities.getRoot(comp));
90 Component comp2 = event.getComponent();
91 if (!comp2.isDisplayable()) {
92 return false;
94 }
95 Point evtPoint = SwingUtilities.convertPoint(comp2,
96 event.getPoint(), SwingUtilities.getRoot(comp2));
97 if (Constants.BOTTOM.equals(side)) {
98 if (evtPoint.x > leftTop.x && evtPoint.x < (leftTop.x + comp.getBounds().width)) {
99 if ( Math.abs(evtPoint.y - leftTop.y) < RESIZE_BUFFER) {
100 return true;
101 }
102 }
103 }
104 if (Constants.LEFT.equals(side)) {
105 if (evtPoint.y > leftTop.y && evtPoint.y < (leftTop.y + comp.getBounds().height)) {
106 int right = comp.getBounds().width + leftTop.x;
107 if (Math.abs(evtPoint.x - right) < RESIZE_BUFFER) {
108 return true;
109 }
110 }
111 }
112 if (Constants.RIGHT.equals(side)) {
113 if (evtPoint.y > leftTop.y && evtPoint.y < (leftTop.y + comp.getBounds().height)) {
114 if ( Math.abs(evtPoint.x - leftTop.x) < RESIZE_BUFFER) {
115 return true;
116 }
117 }
118 }
119 return false;
120 }
121
122 private int resize(MouseEvent event, Point dragPoint) {
123 if (comp == null || side == null) {
124 return 0;
125 }
126 Point leftTop = SwingUtilities.convertPoint(comp,
127 new Point (0,0), SwingUtilities.getRoot(comp));
128 Point evtPoint = SwingUtilities.convertPoint(event.getComponent(),
129 event.getPoint(), SwingUtilities.getRoot(event.getComponent()));
130 if (Constants.BOTTOM.equals(side)) {
131 if (evtPoint.x > leftTop.x && evtPoint.x < (leftTop.x + comp.getBounds().width)) {
132 return evtPoint.y - dragPoint.y;
133 }
134 }
135 if (Constants.LEFT.equals(side) || Constants.RIGHT.equals(side)) {
136 if (evtPoint.y > leftTop.y && evtPoint.y < (leftTop.y + comp.getBounds().height)) {
137 return evtPoint.x - dragPoint.x;
138 }
139 }
140 return 0;
141 }
142
143 public void eventDispatched(java.awt.AWTEvent aWTEvent) {
144 if (comp == null || side == null) {
145 state = STATE_NOOP;
146 resetState();
147 return;
148 }
149 MouseEvent evt = (MouseEvent )aWTEvent;
150 if (evt.getID() == MouseEvent.MOUSE_MOVED) {
151 boolean noModif = evt.getModifiersEx() == 0;
152 if (noModif && isInResizeArea(evt)) {
153 if (state == STATE_NOOP) {
155 state = STATE_START;
156 JRootPane pane = SwingUtilities.getRootPane(comp);
157 oldGlass = pane.getGlassPane();
158 glass.setCursor(side);
159 pane.setGlassPane(glass);
160 glass.setVisible(true);
161 }
162 return;
163 } else if (state != STATE_NOOP) {
164 resetState();
165 }
166 return;
167 }
168 if (evt.getID() == MouseEvent.MOUSE_PRESSED && state == STATE_START) {
169 boolean button1 = (evt.getModifiersEx() & MouseEvent.BUTTON1_DOWN_MASK) == MouseEvent.BUTTON1_DOWN_MASK;
170 if (button1) {
171 if (isInResizeArea(evt)) {
172 state = STATE_DRAGGING;
173 startPoint = SwingUtilities.convertPoint(evt.getComponent(),
174 evt.getPoint(), SwingUtilities.getRoot(evt.getComponent()));
175 evt.consume();
176 return;
177 }
178 }
179 resetState();
180 return;
181 }
182 if (evt.getID() == MouseEvent.MOUSE_DRAGGED && state == STATE_DRAGGING) {
183 boolean button1 = (evt.getModifiersEx() & MouseEvent.BUTTON1_DOWN_MASK) == MouseEvent.BUTTON1_DOWN_MASK;
184 if (button1 && startPoint != null) {
185 int delta = resize(evt, startPoint);
186 if (Math.abs(delta) > 3) {
187 startPoint = SwingUtilities.convertPoint(evt.getComponent(),
188 evt.getPoint(), SwingUtilities.getRoot(evt.getComponent()));
189 mgr.slideResize(delta);
190 }
191 }
192 return;
193 }
194 }
195
196 public boolean isDragging() {
197 return state == STATE_DRAGGING;
198 }
199
200 private void resetState() {
201 state = STATE_NOOP;
202 JRootPane pane = SwingUtilities.getRootPane(comp);
203 glass.setVisible(false);
204 if (pane != null && oldGlass != null) {
205 JComponent current = (JComponent ) pane.getGlassPane();
208 if (current instanceof GlassPane) {
209 pane.setGlassPane(oldGlass);
210 }
211 }
212 oldGlass = null;
213 startPoint = null;
214 }
215
216 private class GlassPane extends JPanel {
217
218 private MouseListener list = new MouseAdapter () {};
219
220 public GlassPane() {
221 setOpaque(false);
222 putClientProperty("dontActivate", Boolean.TRUE);
223 addMouseListener(list);
225 }
226
227 public void setCursor(String side) {
228 setCursor(Constants.BOTTOM.equals(side) ?
229 Cursor.getPredefinedCursor(Cursor.N_RESIZE_CURSOR) :
230 Cursor.getPredefinedCursor(Cursor.E_RESIZE_CURSOR));
231 }
232
233 }
234 }
235
236 |
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