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
|
/* -*- Mode: C ; c-basic-offset: 2 -*- */
/*
* LADI Session Handler (ladish)
*
* Copyright (C) 2010 Nedko Arnaudov <nedko@arnaudov.name>
*
**************************************************************************
* This file contains the canvas zoom related code
**************************************************************************
*
* LADI Session Handler 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.
*
* LADI Session Handler 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 LADI Session Handler. If not, see <http://www.gnu.org/licenses/>
* or write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "zoom.h"
#include "canvas.h"
#include "graph_view.h"
#define ZOOM_CHANGE 1.1
void zoom_100(void)
{
canvas_handle canvas;
log_info("zoom 100%% request");
canvas = get_current_canvas();
if (canvas != NULL)
{
canvas_set_zoom(canvas, 1.0);
}
}
void zoom_fit(void)
{
canvas_handle canvas;
log_info("zoom fit request");
canvas = get_current_canvas();
if (canvas != NULL)
{
canvas_set_zoom_fit(canvas);
}
}
void zoom_in(void)
{
canvas_handle canvas;
log_info("zoom in request");
canvas = get_current_canvas();
if (canvas != NULL)
{
canvas_set_zoom(canvas, canvas_get_zoom(canvas) * ZOOM_CHANGE);
}
}
void zoom_out(void)
{
canvas_handle canvas;
log_info("zoom out request");
canvas = get_current_canvas();
if (canvas != NULL)
{
canvas_set_zoom(canvas, canvas_get_zoom(canvas) / ZOOM_CHANGE);
}
}
|
