workspace/kcontrol/kfontinst/viewpart/FontPreview.cpp

   1 /*
   2  * KFontInst - KDE Font Installer
   3  *
   4  * Copyright 2003-2007 Craig Drummond <craig@kde.org>
   5  *
   6  * ----
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; see the file COPYING.  If not, write to
  20  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  21  * Boston, MA 02110-1301, USA.
  22  */
  23
  24 #include "FontPreview.h"
  25 #include "FcEngine.h"
  26 #include "CharTip.h"
  27 #include <KDE/KApplication>
  28 #include <KDE/KLocale>
  29 #include <QtGui/QPainter>
  30 #include <QtGui/QPaintEvent>
  31 #include <QtGui/QMouseEvent>
  32 #include <QtGui/QWheelEvent>
  33 #include <stdlib.h>
  34
  35 namespace KFI
  36 {
  37
  38 static const int constBorder=4;
  39 static const int constStepSize=16;
  40
  41 CFontPreview::CFontPreview(QWidget *parent)
  42             : QWidget(parent),
  43               itsCurrentFace(1),
  44               itsLastWidth(0),
  45               itsLastHeight(0),
  46               itsStyleInfo(KFI_NO_STYLE_INFO),
  47               itsTip(NULL)
  48 {
  49     itsEngine=new CFcEngine;
  50 }
  51
  52 CFontPreview::~CFontPreview()
  53 {
  54     delete itsTip;
  55 }
  56
  57 void CFontPreview::showFont(const KUrl &url, const QString &name, unsigned long styleInfo,
  58                             int face)
  59 {
  60     itsFontName=name;
  61     itsCurrentUrl=url;
  62     itsStyleInfo=styleInfo;
  63     showFace(face);
  64 }
  65
  66 void CFontPreview::showFace(int face)
  67 {
  68     itsCurrentFace=face;
  69     showFont();
  70 }
  71
  72 void CFontPreview::showFont()
  73 {
  74     itsLastWidth=width()+constStepSize;
  75     itsLastHeight=height()+constStepSize;
  76
  77     if(!itsCurrentUrl.isEmpty() &&
  78        itsEngine->draw(itsCurrentUrl, itsLastWidth, itsLastHeight, itsPixmap,
  79                        itsCurrentFace, false, itsRange, &itsChars, itsFontName,
  80                        itsStyleInfo))
  81     {
  82         itsLastChar=CFcEngine::TChar();
  83         setMouseTracking(itsChars.count()>0);
  84         update();
  85         emit status(true);
  86     }
  87     else
  88     {
  89         QPixmap nullPix;
  90
  91         itsPixmap=nullPix;
  92         itsLastChar=CFcEngine::TChar();
  93         setMouseTracking(false);
  94         update();
  95         emit status(false);
  96     }
  97 }
  98
  99 void CFontPreview::zoomIn()
 100 {
 101     itsEngine->zoomIn();
 102     showFont();
 103 }
 104
 105 void CFontPreview::zoomOut()
 106 {
 107     itsEngine->zoomOut();
 108     showFont();
 109 }
 110
 111 void CFontPreview::setUnicodeRange(const QList<CFcEngine::TRange> &r)
 112 {
 113     itsRange=r;
 114     showFont();
 115 }
 116
 117 void CFontPreview::paintEvent(QPaintEvent *)
 118 {
 119     QPainter paint(this);
 120
 121     paint.fillRect(rect(), palette().base());
 122     if(!itsPixmap.isNull())
 123     {
 124
 125         if(abs(width()-itsLastWidth)>constStepSize || abs(height()-itsLastHeight)>constStepSize)
 126             showFont();
 127         else
 128             paint.drawPixmap(QPoint(constBorder, constBorder), itsPixmap,
 129                              QRect(0, 0, width()-(constBorder*2), height()-(constBorder*2)));
 130     }
 131 }
 132
 133 void CFontPreview::mouseMoveEvent(QMouseEvent *event)
 134 {
 135     if(itsChars.size())
 136     {
 137         QList<CFcEngine::TChar>::ConstIterator end(itsChars.end());
 138
 139         if(itsLastChar.isNull() || !itsLastChar.contains(event->pos()))
 140             for(QList<CFcEngine::TChar>::ConstIterator it(itsChars.begin()); it!=end; ++it)
 141                 if((*it).contains(event->pos()))
 142                 {
 143                     if(!itsTip)
 144                         itsTip=new CCharTip(this);
 145
 146                     itsTip->setItem(*it);
 147                     itsLastChar=*it;
 148                     break;
 149                 }
 150     }
 151 }
 152
 153 void CFontPreview::wheelEvent(QWheelEvent *e)
 154 {
 155     if(e->delta()>0)
 156         emit doZoomIn();
 157     else if(e->delta()<0)
 158         emit doZoomOut();
 159
 160     e->accept();
 161 }
 162
 163 QSize CFontPreview::sizeHint() const
 164 {
 165     return QSize(132, 132);
 166 }
 167
 168 QSize CFontPreview::minimumSizeHint() const
 169 {
 170     return QSize(32, 32);
 171 }
 172
 173 }
 174
 175 #include "FontPreview.moc"