1 /*
2 * Copyright (C) 2008-2009, Pino Toscano <pino@kde.org>
3 * Copyright (C) 2013, Fabio D'Urso <fabiodurso@hotmail.it>
4 * Copyright (C) 2017, Albert Astals Cid <aacid@kde.org>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2, or (at your option)
9 * any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
19 */
20
21 #include "pageview.h"
22
23 #include <poppler-qt5.h>
24
25 #include <QtWidgets/QApplication>
26 #include <QtWidgets/QDesktopWidget>
27 #include <QtGui/QImage>
28 #include <QtWidgets/QLabel>
29 #include <QtGui/QPixmap>
30 #include <QDebug>
31
PageView(QWidget * parent)32 PageView::PageView(QWidget *parent) : QScrollArea(parent), m_zoom(1.0), m_rotation(0), m_dpiX(QApplication::desktop()->physicalDpiX()), m_dpiY(QApplication::desktop()->physicalDpiY())
33 {
34 m_imageLabel = new QLabel(this);
35 m_imageLabel->resize(0, 0);
36 setWidget(m_imageLabel);
37 }
38
~PageView()39 PageView::~PageView() { }
40
documentLoaded()41 void PageView::documentLoaded() { }
42
documentClosed()43 void PageView::documentClosed()
44 {
45 m_imageLabel->clear();
46 m_imageLabel->resize(0, 0);
47 }
48
pageChanged(int page)49 void PageView::pageChanged(int page)
50 {
51 Poppler::Page *popplerPage = document()->page(page);
52
53 if (!popplerPage) {
54 qDebug() << "Page" << page << "is malformed";
55 return;
56 }
57 const double resX = m_dpiX * m_zoom;
58 const double resY = m_dpiY * m_zoom;
59
60 Poppler::Page::Rotation rot;
61 if (m_rotation == 0)
62 rot = Poppler::Page::Rotate0;
63 else if (m_rotation == 90)
64 rot = Poppler::Page::Rotate90;
65 else if (m_rotation == 180)
66 rot = Poppler::Page::Rotate180;
67 else // m_rotation == 270
68 rot = Poppler::Page::Rotate270;
69
70 QImage image = popplerPage->renderToImage(resX, resY, -1, -1, -1, -1, rot);
71 if (!image.isNull()) {
72 m_imageLabel->resize(image.size());
73 m_imageLabel->setPixmap(QPixmap::fromImage(image));
74 } else {
75 m_imageLabel->resize(0, 0);
76 m_imageLabel->setPixmap(QPixmap());
77 }
78 delete popplerPage;
79 }
80
slotZoomChanged(qreal value)81 void PageView::slotZoomChanged(qreal value)
82 {
83 m_zoom = value;
84 if (!document()) {
85 return;
86 }
87 reloadPage();
88 }
89
slotRotationChanged(int value)90 void PageView::slotRotationChanged(int value)
91 {
92 m_rotation = value;
93 if (!document()) {
94 return;
95 }
96 reloadPage();
97 }
98