apps/plasma/applets/folderview/dialog.cpp

   1 /*
   2  *   Copyright © 2008 Fredrik Höglund <fredrik@kde.org>
   3  *
   4  *   This library is free software; you can redistribute it and/or
   5  *   modify it under the terms of the GNU Library General Public
   6  *   License as published by the Free Software Foundation; either
   7  *   version 2 of the License, or (at your option) any later version.
   8  *
   9  *   This library 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 GNU
  12  *   Library General Public License for more details.
  13  *
  14  *   You should have received a copy of the GNU Library General Public License
  15  *   along with this library; see the file COPYING.LIB.  If not, write to
  16  *   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  17  *   Boston, MA 02110-1301, USA.
  18  */
  19
  20 #include "dialog.h"
  21
  22 #include <QApplication>
  23 #include <QBitmap>
  24 #include <QDesktopWidget>
  25 #include <QGraphicsView>
  26 #include <QGraphicsWidget>
  27 #include <QGraphicsScene>
  28
  29 #include <KWindowSystem>
  30
  31 #include <Plasma/Applet>
  32 #include <Plasma/FrameSvg>
  33
  34 #ifdef Q_WS_X11
  35 #  include <QX11Info>
  36 #endif
  37
  38
  39 Dialog::Dialog(QWidget *parent, Qt::WindowFlags f)
  40     : QWidget(parent, f), m_widget(0)
  41 {
  42     setWindowFlags(Qt::Popup | Qt::WindowStaysOnTopHint);
  43
  44 #ifdef Q_WS_X11
  45     if (!QX11Info::isCompositingManagerRunning()) {
  46         setAttribute(Qt::WA_NoSystemBackground);
  47     }
  48 #endif
  49
  50     KWindowSystem::setState(effectiveWinId(), NET::SkipTaskbar | NET::SkipPager);
  51
  52     QPalette pal = palette();
  53     pal.setColor(backgroundRole(), Qt::transparent);
  54     setPalette(pal);
  55
  56     m_background = new Plasma::FrameSvg(this);
  57     m_background->setImagePath("dialogs/background");
  58
  59     m_scene = new QGraphicsScene(this);
  60     m_view = new QGraphicsView(m_scene, this);
  61     m_view->setFrameShape(QFrame::NoFrame);
  62     m_view->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
  63     m_view->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
  64     m_view->viewport()->setAutoFillBackground(false);
  65 }
  66
  67 Dialog::~Dialog()
  68 {
  69 }
  70
  71 void Dialog::setGraphicsWidget(QGraphicsWidget *widget)
  72 {
  73     m_widget = widget;
  74     m_scene->addItem(widget);
  75 }
  76
  77 void Dialog::show(Plasma::Applet *applet)
  78 {
  79     Plasma::FrameSvg::EnabledBorders borders = Plasma::FrameSvg::AllBorders;
  80     m_background->setEnabledBorders(borders);
  81
  82     int left   = m_background->marginSize(Plasma::LeftMargin);
  83     int top    = m_background->marginSize(Plasma::TopMargin);
  84     int right  = m_background->marginSize(Plasma::RightMargin);
  85     int bottom = m_background->marginSize(Plasma::BottomMargin);
  86
  87     switch (applet->location())
  88     {
  89     case Plasma::BottomEdge:
  90         borders &= ~Plasma::FrameSvg::BottomBorder;
  91         bottom = qMin(bottom, 2);
  92         break;
  93
  94     case Plasma::TopEdge:
  95         borders &= ~Plasma::FrameSvg::TopBorder;
  96         top = qMin(top, 2);
  97         break;
  98
  99     case Plasma::LeftEdge:
 100         borders &= ~Plasma::FrameSvg::LeftBorder;
 101         left = qMin(left, 2);
 102         break;
 103
 104     case Plasma::RightEdge:
 105         borders &= ~Plasma::FrameSvg::RightBorder;
 106         right = qMin(right, 2);
 107         break;
 108
 109     default:
 110         break;
 111     }
 112
 113     const QRect availableGeometry = QApplication::desktop()->availableGeometry();
 114     const QSize maxSize = availableGeometry.size();
 115
 116     const QSize margin(left + right, top + bottom);
 117     QSize size = m_widget->preferredSize().toSize() + margin;
 118     QPoint pos = applet->popupPosition(size);
 119
 120     if (pos.y() < 0) {
 121         size.rheight() += pos.y();
 122         pos.ry() = 0;
 123     } else if (pos.y() + size.height() > availableGeometry.bottom()) {
 124         size.rheight() -= pos.y() + size.height() - availableGeometry.bottom();
 125     }
 126
 127     if (pos.x() < 0) {
 128         size.rwidth() += pos.x();
 129         pos.rx() = 0;
 130     } else if (pos.x() + size.width() > availableGeometry.right()) {
 131         size.rwidth() -= pos.x() + size.width() - availableGeometry.right();
 132     }
 133
 134     m_widget->resize(size - margin);
 135
 136     m_background->setEnabledBorders(borders);
 137     setContentsMargins(left, top, right, bottom);
 138
 139     resize(size);
 140     move(pos);
 141
 142     QWidget::show();
 143 }
 144
 145 void Dialog::resizeEvent(QResizeEvent *event)
 146 {
 147     Q_UNUSED(event)
 148
 149     m_background->resizeFrame(rect().size());
 150     m_view->setGeometry(contentsRect());
 151
 152 #ifdef Q_WS_X11
 153     if (!QX11Info::isCompositingManagerRunning()) {
 154         setMask(m_background->mask());
 155     }
 156 #endif
 157 }
 158
 159 void Dialog::paintEvent(QPaintEvent *event)
 160 {
 161     Q_UNUSED(event)
 162
 163     QPainter p(this);
 164     p.setCompositionMode(QPainter::CompositionMode_Source);
 165     p.fillRect(rect(), Qt::transparent);
 166     p.setCompositionMode(QPainter::CompositionMode_SourceOver);
 167     m_background->paintFrame(&p);
 168 }
 169
 170 void Dialog::focusOutEvent(QFocusEvent *event)
 171 {
 172     Q_UNUSED(event)
 173     hide();
 174 }
 175