workspace/libs/plasma/view.cpp

   1 /*
   2  *   Copyright 2007 Aaron Seigo <aseigo@kde.org>
   3  *
   4  *   This program is free software; you can redistribute it and/or modify
   5  *   it under the terms of the GNU Library General Public License as
   6  *   published by the Free Software Foundation; either version 2, or
   7  *   (at your option) any later version.
   8  *
   9  *   This program is distributed in the hope that it will be useful,
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *   GNU General Public License for more details
  13  *
  14  *   You should have received a copy of the GNU Library General Public
  15  *   License along with this program; if not, write to the
  16  *   Free Software Foundation, Inc.,
  17  *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  18  */
  19
  20 #include "view.h"
  21
  22 #include <KWindowSystem>
  23
  24 #include "corona.h"
  25 #include "containment.h"
  26
  27 using namespace Plasma;
  28
  29 namespace Plasma
  30 {
  31
  32 class View::Private
  33 {
  34 public:
  35     Private()
  36         : drawWallpaper(true),
  37           desktop(-1),
  38           containment(0)
  39     {
  40     }
  41
  42     ~Private()
  43     {
  44     }
  45
  46     bool drawWallpaper;
  47     int desktop;
  48     Plasma::Containment *containment;
  49 };
  50
  51 View::View(int screen, Corona *corona, QWidget *parent)
  52     : QGraphicsView(parent),
  53       d(new Private)
  54 {
  55     initGraphicsView();
  56     setScene(corona);
  57     setScreen(screen);
  58 }
  59
  60 View::View(Containment *containment, QWidget *parent)
  61     : QGraphicsView(parent),
  62       d(new Private)
  63 {
  64     Q_ASSERT(containment);
  65     initGraphicsView();
  66     setScene(containment->scene());
  67     setContainment(containment);
  68 }
  69
  70 void View::initGraphicsView()
  71 {
  72     setFrameShape(QFrame::NoFrame);
  73     setAutoFillBackground(true);
  74     setDragMode(QGraphicsView::NoDrag);
  75     //setCacheMode(QGraphicsView::CacheBackground);
  76     setInteractive(true);
  77     setAcceptDrops(true);
  78     setAlignment(Qt::AlignLeft | Qt::AlignTop);
  79     setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
  80     setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
  81 }
  82
  83 View::~View()
  84 {
  85     delete d;
  86 }
  87
  88 void View::setScreen(int screen)
  89 {
  90     if (screen > -1) {
  91         Corona *corona = qobject_cast<Corona*>(scene());
  92
  93         if (!corona) {
  94             return;
  95         }
  96
  97         setContainment(corona->containmentForScreen(screen));
  98         if (d->desktop < -1) {
  99             // we want to set it to "all desktops" if we get ownership of
 100             // a screen but don't have a desktop set
 101             d->desktop = -1;
 102         }
 103     }
 104 }
 105
 106 int View::screen() const
 107 {
 108     return d->containment->screen();
 109 }
 110
 111 void View::setDesktop(int desktop)
 112 {
 113     // -1 == All desktops
 114     if (desktop < -1 || desktop > KWindowSystem::numberOfDesktops() - 1) {
 115         desktop = -1;
 116     }
 117
 118     d->desktop = desktop;
 119 }
 120
 121 int View::desktop() const
 122 {
 123     return d->desktop;
 124 }
 125
 126 int View::effectiveDesktop() const
 127 {
 128     return d->desktop > -1 ? d->desktop : KWindowSystem::currentDesktop();
 129 }
 130
 131 void View::setContainment(Containment *containment)
 132 {
 133     if (!containment) {
 134         return;
 135     }
 136
 137     if (d->containment) {
 138         disconnect(d->containment, SIGNAL(geometryChanged()), this, SLOT(updateSceneRect()));
 139     }
 140
 141     d->containment = containment;
 142     updateSceneRect();
 143     connect(containment, SIGNAL(geometryChanged()), this, SLOT(updateSceneRect()));
 144 }
 145
 146 Containment* View::containment() const
 147 {
 148     return d->containment;
 149 }
 150
 151 void View::setDrawWallpaper(bool draw)
 152 {
 153     d->drawWallpaper = draw;
 154 }
 155
 156 bool View::drawWallpaper() const
 157 {
 158     return d->drawWallpaper;
 159 }
 160
 161 void View::updateSceneRect()
 162 {
 163     setSceneRect(d->containment->sceneBoundingRect());
 164 }
 165
 166 } // namespace Plasma
 167
 168 #include "view.moc"
 169