/
ULIPaintSelectionRectangleTool.m
155 lines (124 loc) · 4.36 KB
/
ULIPaintSelectionRectangleTool.m
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
//
// UKPaintSelectTool.m
// UKPaintView
//
// Created by Uli Kusterer on Sat Nov 01 2003.
// Copyright (c) 2007 M. Uli Kusterer. All rights reserved.
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
// claim that you wrote the original software. If you use this software
// in a product, an acknowledgment in the product documentation would be
// appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such, and must not be
// misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source
// distribution.
//
#import "ULIPaintSelectionRectangleTool.h"
#import "ULIPaintView.h"
#import "NSCursor+CrossHair.h"
@implementation ULIPaintSelectionRectangleTool
-(void) trackingWillStart
{
dragNotCreate = NSPointInRect( [owner initialPos], [owner selectionFrame] ); // Are we moving a selection or creating a new one?
// Remove old selection while user is drawing a new one with this tool:
// And don't show selection outline during drag for more exact positioning.
[owner setDrawSelectionHighlight: NO];
[owner setNeedsDisplay: YES];
}
/* Override this to draw a shape during tracking:
The drawings you do in here will be undone before you're called again.
This is also called when tracking has finished by drawFinalToolShapeFrom:to: by default. */
-(void) drawTemporaryTrackingToolShapeFrom: (NSPoint*)prevPos to: (NSPoint)currPos
{
NSRect box, oldBox;
if( dragNotCreate )
{
oldBox = [owner selectionFrame];
box = oldBox;
box.origin.x += currPos.x -prevPos->x;
box.origin.y += currPos.y -prevPos->y;
[owner setSelectionFrame: box];
}
else
{
NSPoint initialPos = [owner initialPos];
box = [self rectFrom: initialPos to: currPos];
oldBox = [self rectFrom: initialPos to: *prevPos];
}
[owner drawSelectionHighlightAroundPath: [NSBezierPath bezierPathWithRect: box]];
[owner selectionHighlightNeedsDisplayForRect: oldBox];
[owner selectionHighlightNeedsDisplayForRect: box];
*prevPos = currPos;
}
-(void) drawFinalToolShapeFrom: (NSPoint*)prevPos to: (NSPoint)currPos
{
if( !dragNotCreate )
{
NSPoint initialPos = [owner initialPos];
NSRect box = [self rectFrom: initialPos to: currPos];
box.origin.x = truncf(box.origin.x);
box.origin.y = truncf(box.origin.y);
// Merge old selection into our image:
NSRect oldSelBounds = NSZeroRect, oldSelFrame;
NSImage* selection = [owner floatingSelectionImage];
oldSelBounds.size = [selection size];
oldSelFrame = [owner selectionFrame];
[selection drawInRect: oldSelFrame fromRect: oldSelBounds operation: NSCompositeSourceOver fraction: 1.0];
[selection lockFocus];
// Clear old selection:
[[NSColor colorWithCalibratedWhite: 1.0 alpha: 0.0] set];
[NSBezierPath setDefaultLineWidth: 1];
NSRectFill(oldSelBounds);
[selection unlockFocus];
if( initialPos.x != currPos.x || initialPos.y != currPos.y )
{
[selection setSize: box.size];
[selection lockFocus];
// ... and copy the new one in:
NSRect boundsBox = box;
boundsBox.origin = NSZeroPoint;
[[owner image] drawInRect: boundsBox fromRect: box operation: NSCompositeCopy fraction: 1.0];
[selection unlockFocus];
[owner setSelectionFrame: box];
// Erase where new selection used to be:
[[NSColor colorWithCalibratedWhite: 1.0 alpha: 0.0] set];
[NSBezierPath setDefaultLineWidth: 1];
NSRectFill(box);
}
else
{
[selection setSize: NSMakeSize(8,8)]; // Save us some memory.
box.size = NSZeroSize;
box.origin = initialPos;
[owner setSelectionFrame: box];
}
}
[owner setDrawSelectionHighlight: YES]; // We turned it off, we turn it on again.
[owner setNeedsDisplay: YES];
[[owner window] invalidateCursorRectsForView: owner];
*prevPos = currPos;
}
-(NSCursor*) drawingCursor
{
return [NSCursor crossHairCursor];
}
-(NSCursor*) selectionCursor
{
return [NSCursor arrowCursor];
}
-(NSString*) toolIconName
{
return @"UKPaintSelectTool";
}
@end