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
|
/*
* This file is part of Calligra
*
* Copyright (C) 2011 Jan Hambrecht <jaham@gmx.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* version 2.1 as published by the Free Software Foundation.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#include "CSThumbProviderKarbon.h"
#include <KarbonPart.h>
#include <KarbonDocument.h>
#include <QApplication>
#include <QEventLoop>
#include <QPixmap>
#include <QPainter>
void processEvents()
{
int i = 100;
while (QCoreApplication::hasPendingEvents() && i > 0) {
--i;
QCoreApplication::processEvents(QEventLoop::ExcludeUserInputEvents);
}
}
CSThumbProviderKarbon::CSThumbProviderKarbon(KarbonDocument *doc)
: m_doc(doc)
{
}
CSThumbProviderKarbon::~CSThumbProviderKarbon()
{
}
QList<QImage> CSThumbProviderKarbon::createThumbnails(const QSize &thumbSize)
{
// make sure everything is rendered before painting
processEvents();
QImage thumbnail(thumbSize, QImage::Format_RGB32);
thumbnail.fill(QColor(Qt::white).rgb());
QPainter thumbPainter(&thumbnail);
m_doc->paintContent(thumbPainter, QRect(QPoint(0, 0), thumbSize));
// make sure there are no events; this fixes a crash on shutdown
processEvents();
return QList<QImage>() << thumbnail;
}
|
