libs/widgets/KoDpi.cpp

0001 /* This file is part of the KDE project
0002    Copyright (C) 2001 David Faure <faure@kde.org>
0003    Copyright 2003 Nicolas GOUTTE <goutte@kde.org>
0004    Copyright 2009 Thomas Zander <zander@kde.org>
0005
0006    This library is free software; you can redistribute it and/or
0007    modify it under the terms of the GNU Library General Public
0008    License as published by the Free Software Foundation; either
0009    version 2 of the License, or (at your option) any later version.
0010
0011    This library is distributed in the hope that it will be useful,
0012    but WITHOUT ANY WARRANTY; without even the implied warranty of
0013    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
0014    Library General Public License for more details.
0015
0016    You should have received a copy of the GNU Library General Public License
0017    along with this library; see the file COPYING.LIB.  If not, write to
0018    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
0019  * Boston, MA 02110-1301, USA.
0020 */
0021
0022 #include "KoDpi.h"
0023
0024 #include <QFontInfo>
0025
0026 #ifdef HAVE_X11
0027 #include <QX11Info>
0028 #else
0029 #include <QApplication>
0030 #include <QDesktopWidget>
0031 #endif
0032
0033 #include <QGlobalStatic>
0034
0035 Q_GLOBAL_STATIC(KoDpi, s_instance)
0036
0037 KoDpi* KoDpi::self()
0038 {
0039     return s_instance;
0040 }
0041
0042 KoDpi::KoDpi()
0043 {
0044     // Another way to get the DPI of the display would be QPaintDeviceMetrics,
0045     // but we have no widget here (and moving this to KoView wouldn't allow
0046     // using this from the document easily).
0047 #ifdef HAVE_X11
0048     m_dpiX = QX11Info::appDpiX();
0049     m_dpiY = QX11Info::appDpiY();
0050 #else
0051     QDesktopWidget *w = QApplication::desktop();
0052     if (w) {
0053         m_dpiX = w->logicalDpiX();
0054         m_dpiY = w->logicalDpiY();
0055     } else {
0056         m_dpiX = 75;
0057         m_dpiY = 75;
0058     }
0059 #endif
0060 }
0061
0062 void KoDpi::setDPI(int x, int y)
0063 {
0064     //debugWidgets << x <<"," << y;
0065     KoDpi* s = self();
0066     s->m_dpiX = x;
0067     s->m_dpiY = y;
0068 }