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
|
/*
Copyright (C) 2014 Paul Davis
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <iostream>
#include "pbd/compose.h"
#include "canvas/canvas.h"
#include "canvas/debug.h"
#include "canvas/scroll_group.h"
using namespace std;
using namespace ArdourCanvas;
ScrollGroup::ScrollGroup (Canvas* c, ScrollSensitivity s)
: Container (c)
, _scroll_sensitivity (s)
{
}
ScrollGroup::ScrollGroup (Item* parent, ScrollSensitivity s)
: Container (parent)
, _scroll_sensitivity (s)
{
}
void
ScrollGroup::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
{
/* clip the draw to the area that this scroll group nominally occupies
* WITHOUT scroll offsets in effect
*/
Rect r = bounding_box();
if (!r) {
return;
}
Rect self (_position.x + r.x0,
_position.y + r.y0,
_position.x + r.x1,
_position.y + r.y1);
self.x1 = min (_position.x + _canvas->width(), self.x1);
self.y1 = min (_position.y + _canvas->height(), self.y1);
context->save ();
context->rectangle (self.x0, self.y0, self.width(), self.height());
context->clip ();
Container::render (area, context);
context->restore ();
}
void
ScrollGroup::scroll_to (Duple const& d)
{
if (_scroll_sensitivity & ScrollsHorizontally) {
_scroll_offset.x = d.x;
}
if (_scroll_sensitivity & ScrollsVertically) {
_scroll_offset.y = d.y;
}
}
bool
ScrollGroup::covers_canvas (Duple const& d) const
{
Rect r = bounding_box ();
if (!r) {
return false;
}
/* Bounding box is in item coordinates, but we need
to consider the position of the bounding box
within the canvas.
*/
return r.translate (position()).contains (d);
}
bool
ScrollGroup::covers_window (Duple const& d) const
{
Rect r = bounding_box ();
if (!r) {
return false;
}
/* Bounding box is in item coordinates, but we need
to consider the position of the bounding box
within the canvas.
*/
return r.translate (position()).contains (d);
}
|