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
|
/*************************************************************************
* Copyright © 2011-2020 Vincent Prat & Simon Nicolas
*
* 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 3 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*************************************************************************/
#include "ImageWindow.h"
#include <QPainter>
#include <QFileInfo>
#include <QApplication>
#include <QDesktopWidget>
ImageWindow::ImageWindow(const std::string &pictureFileName, QWidget *parent): QLabel(parent), bError(false), sImageFileName(pictureFileName), bSvg(true), renderer(0)
{
setAlignment(Qt::AlignCenter);
setWindowFlags(windowFlags()|Qt::Window);
// setting background color to black
QPalette newPalette(palette());
newPalette.setColor(QPalette::Window,QColor("black"));
setPalette(newPalette);
// displaying (or not) the picture
if (sImageFileName.length() < 3 || !QFileInfo(sImageFileName.c_str()).exists())
{
bError = true;
return;
}
if (sImageFileName.substr(sImageFileName.length()-3,3) != "svg")
{
bSvg = false;
pix = QPixmap(sImageFileName.c_str());
if (pix.isNull())
{
// the image cannot be loaded
bError = true;
return;
}
else
{
setPixmap(pix);
}
}
if (bSvg)
{
renderer = new QSvgRenderer(this);
if (!renderer->load(QString(sImageFileName.c_str())))
{
// unable to load the image
bError = true;
return;
}
resize(renderer->defaultSize());
// the size is fixed when the image does not exist
QRectF rect = renderer->viewBoxF();
dAspectRatio = rect.width()/rect.height();
}
showNormal();
}
void ImageWindow::mouseReleaseEvent(QMouseEvent *)
{
if (!isFullScreen())
{
setWindowState(Qt::WindowMaximized);
showFullScreen();
}
else
{
showNormal();
}
}
void ImageWindow::keyReleaseEvent(QKeyEvent *e)
{
switch (e->key())
{
case Qt::Key_Escape: showNormal();
break;
default: break;
}
}
void ImageWindow::resizeEvent(QResizeEvent *e)
{
// overriden event handler
QLabel::resizeEvent(e);
// replacing the pixmap
if (bSvg)
{
// scaling
int w = width();
int h = w / dAspectRatio;
if (h > height())
{
h = height();
w = h * dAspectRatio;
}
QImage image(w, h, QImage::Format_ARGB32);
image.fill(QPalette::Window);
QPainter painter(&image);
renderer->render(&painter);
setPixmap(QPixmap::fromImage(image));
}
else
{
setPixmap(pix.scaled(e->size(),Qt::KeepAspectRatio));
}
}
bool ImageWindow::error() const
{
return bError;
}
QSize ImageWindow::sizeHint() const
{
QRect screen = QApplication::desktop()->screenGeometry(this);
return QSize(screen.width() / 2, (2 * screen.height() / 3));
}
|
