1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
|
/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Eclipse Public License, Version 1.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.eclipse.org/org/documents/epl-v10.php
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.ide.eclipse.adt.internal.editors.layout.gle2;
import org.eclipse.swt.dnd.DragSourceEvent;
import org.eclipse.swt.dnd.DragSourceListener;
import org.eclipse.swt.dnd.DropTargetEvent;
import org.eclipse.swt.events.MenuDetectEvent;
import org.eclipse.swt.events.MouseEvent;
import org.eclipse.swt.events.MouseListener;
import org.eclipse.swt.graphics.Point;
/**
* A {@link ControlPoint} is a coordinate in the canvas control which corresponds
* exactly to (0,0) at the top left of the canvas. It is unaffected by canvas
* zooming.
*/
public final class ControlPoint {
/** Containing canvas which the point is relative to. */
private final LayoutCanvas mCanvas;
/** The X coordinate of the mouse coordinate. */
public final int x;
/** The Y coordinate of the mouse coordinate. */
public final int y;
/**
* Constructs a new {@link ControlPoint} from the given event. The event
* must be from a {@link MouseListener} associated with the
* {@link LayoutCanvas} such that the {@link MouseEvent#x} and
* {@link MouseEvent#y} fields are relative to the canvas.
*
* @param canvas The {@link LayoutCanvas} this point is within.
* @param event The mouse event to construct the {@link ControlPoint}
* from.
* @return A {@link ControlPoint} which corresponds to the given
* {@link MouseEvent}.
*/
public static ControlPoint create(LayoutCanvas canvas, MouseEvent event) {
// The mouse event coordinates should already be relative to the canvas
// widget.
assert event.widget == canvas : event.widget;
return new ControlPoint(canvas, event.x, event.y);
}
/**
* Constructs a new {@link ControlPoint} from the given menu detect event.
*
* @param canvas The {@link LayoutCanvas} this point is within.
* @param event The menu detect event to construct the {@link ControlPoint} from.
* @return A {@link ControlPoint} which corresponds to the given
* {@link MenuDetectEvent}.
*/
public static ControlPoint create(LayoutCanvas canvas, MenuDetectEvent event) {
// The menu detect events are always display-relative.
org.eclipse.swt.graphics.Point p = canvas.toControl(event.x, event.y);
return new ControlPoint(canvas, p.x, p.y);
}
/**
* Constructs a new {@link ControlPoint} from the given event. The event
* must be from a {@link DragSourceListener} associated with the
* {@link LayoutCanvas} such that the {@link DragSourceEvent#x} and
* {@link DragSourceEvent#y} fields are relative to the canvas.
*
* @param canvas The {@link LayoutCanvas} this point is within.
* @param event The mouse event to construct the {@link ControlPoint}
* from.
* @return A {@link ControlPoint} which corresponds to the given
* {@link DragSourceEvent}.
*/
public static ControlPoint create(LayoutCanvas canvas, DragSourceEvent event) {
// The drag source event coordinates should already be relative to the
// canvas widget.
return new ControlPoint(canvas, event.x, event.y);
}
/**
* Constructs a new {@link ControlPoint} from the given event.
*
* @param canvas The {@link LayoutCanvas} this point is within.
* @param event The mouse event to construct the {@link ControlPoint}
* from.
* @return A {@link ControlPoint} which corresponds to the given
* {@link DropTargetEvent}.
*/
public static ControlPoint create(LayoutCanvas canvas, DropTargetEvent event) {
// The drop target events are always relative to the display, so we must
// first convert them to be canvas relative.
org.eclipse.swt.graphics.Point p = canvas.toControl(event.x, event.y);
return new ControlPoint(canvas, p.x, p.y);
}
/**
* Constructs a new {@link ControlPoint} from the given x,y coordinates,
* which must be relative to the given {@link LayoutCanvas}.
*
* @param canvas The {@link LayoutCanvas} this point is within.
* @param x The mouse event x coordinate relative to the canvas
* @param y The mouse event x coordinate relative to the canvas
* @return A {@link ControlPoint} which corresponds to the given
* coordinates.
*/
public static ControlPoint create(LayoutCanvas canvas, int x, int y) {
return new ControlPoint(canvas, x, y);
}
/**
* Constructs a new canvas control coordinate with the given X and Y
* coordinates. This is private; use one of the factory methods
* {@link #create(LayoutCanvas, MouseEvent)},
* {@link #create(LayoutCanvas, DragSourceEvent)} or
* {@link #create(LayoutCanvas, DropTargetEvent)} instead.
*
* @param canvas The canvas which contains this coordinate
* @param x The mouse x coordinate
* @param y The mouse y coordinate
*/
private ControlPoint(LayoutCanvas canvas, int x, int y) {
mCanvas = canvas;
this.x = x;
this.y = y;
}
/**
* Returns the equivalent {@link LayoutPoint} to this
* {@link ControlPoint}.
*
* @return The equivalent {@link LayoutPoint} to this
* {@link ControlPoint}.
*/
public LayoutPoint toLayout() {
int lx = mCanvas.getHorizontalTransform().inverseTranslate(x);
int ly = mCanvas.getVerticalTransform().inverseTranslate(y);
return LayoutPoint.create(mCanvas, lx, ly);
}
@Override
public String toString() {
return "ControlPoint [x=" + x + ", y=" + y + "]"; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + x;
result = prime * result + y;
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
ControlPoint other = (ControlPoint) obj;
if (x != other.x)
return false;
if (y != other.y)
return false;
if (mCanvas != other.mCanvas) {
return false;
}
return true;
}
/**
* Returns this point as an SWT point in the display coordinate system
*
* @return this point as an SWT point in the display coordinate system
*/
public Point toDisplayPoint() {
return mCanvas.toDisplay(x, y);
}
}
|
