workspace/plasma/shells/screensaver/saverview.cpp

   1 /*
   2  *   Copyright 2007 Aaron Seigo <aseigo@kde.org>
   3  *   Copyright 2007 Matt Broadstone <mbroadst@gmail.com>
   4  *   Copyright 2007 André Duffeck <duffeck@kde.org>
   5  *   Copyright 2008 Chani Armitage <chanika@gmail.com>
   6  *
   7  *   This program is free software; you can redistribute it and/or modify
   8  *   it under the terms of the GNU Library General Public License as
   9  *   published by the Free Software Foundation; either version 2, or
  10  *   (at your option) any later version.
  11  *
  12  *   This program is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details
  16  *
  17  *   You should have received a copy of the GNU Library General Public
  18  *   License along with this program; if not, write to the
  19  *   Free Software Foundation, Inc.,
  20  *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  21  */
  22
  23 #include "saverview.h"
  24
  25 #include <QKeyEvent>
  26 #include <QTimer>
  27
  28 //#include <KWindowSystem>
  29
  30 #include <Plasma/Applet>
  31 #include <Plasma/Corona>
  32 #include <Plasma/Containment>
  33 #include <Plasma/Svg>
  34
  35 #include "appletbrowser.h"
  36 #include "plasmaapp.h"
  37
  38 static const int SUPPRESS_SHOW_TIMEOUT = 500; // Number of millis to prevent reshow of dashboard
  39
  40 SaverView::SaverView(Plasma::Containment *containment, QWidget *parent)
  41     : Plasma::View(containment, parent),
  42       m_appletBrowser(0),
  43       m_suppressShow(false),
  44       m_setupMode(false)
  45 {
  46     setWindowFlags(Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint |
  47             Qt::X11BypassWindowManagerHint);
  48     if (!PlasmaApp::hasComposite()) {
  49         setAutoFillBackground(false);
  50         setAttribute(Qt::WA_NoSystemBackground);
  51     }
  52
  53     //app is doing this for us - if needed
  54     //QDesktopWidget *desktop = QApplication::desktop();
  55     //setGeometry(desktop->screenGeometry(containment->screen()));
  56
  57     setWallpaperEnabled(!PlasmaApp::hasComposite());
  58
  59     installEventFilter(this);
  60 }
  61
  62 SaverView::~SaverView()
  63 {
  64     delete m_appletBrowser;
  65 }
  66
  67 void SaverView::enableSetupMode()
  68 {
  69     if (!m_setupMode) {
  70         m_setupMode = true;
  71         update();
  72     }
  73 }
  74
  75 void SaverView::disableSetupMode()
  76 {
  77     if (m_setupMode) {
  78         m_setupMode = false;
  79         update();
  80     }
  81 }
  82
  83 void SaverView::drawBackground(QPainter * painter, const QRectF & rect)
  84 {
  85     if (PlasmaApp::hasComposite()) {
  86         painter->setCompositionMode(QPainter::CompositionMode_Source);
  87         painter->fillRect(rect, QColor(0, 0, 0, 0));
  88         //FIXME kwin's shadow effect is getting drawn behind me. do not want.
  89     } else {
  90         Plasma::View::drawBackground(painter, rect);
  91     }
  92 }
  93
  94 void SaverView::showAppletBrowser()
  95 {
  96     if (!m_appletBrowser) {
  97         m_appletBrowser = new Plasma::AppletBrowser(this, Qt::FramelessWindowHint );
  98         m_appletBrowser->setContainment(containment());
  99         //TODO: make this proportional to the screen
 100         m_appletBrowser->setInitialSize(QSize(400, 400));
 101         m_appletBrowser->setApplication();
 102         m_appletBrowser->setWindowTitle(i18n("Add Widgets"));
 103         QPalette p = m_appletBrowser->palette();
 104         p.setBrush(QPalette::Background, QBrush(QColor(0, 0, 0, 180)));
 105         m_appletBrowser->setPalette(p);
 106         m_appletBrowser->setBackgroundRole(QPalette::Background);
 107         m_appletBrowser->setAutoFillBackground(true);
 108         m_appletBrowser->setWindowFlags(Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint |
 109                 Qt::X11BypassWindowManagerHint);
 110         //KWindowSystem::setState(m_appletBrowser->winId(), NET::KeepAbove|NET::SkipTaskbar);
 111         m_appletBrowser->move(0, 0);
 112         m_appletBrowser->installEventFilter(this);
 113     }
 114
 115     //TODO give the filter kbd focus
 116     m_appletBrowser->setHidden(m_appletBrowser->isVisible());
 117 }
 118
 119 void SaverView::hideAppletBrowser()
 120 {
 121     if (m_appletBrowser) {
 122         m_appletBrowser->hide();
 123     }
 124 }
 125
 126 void SaverView::appletBrowserDestroyed()
 127 {
 128     m_appletBrowser = 0;
 129 }
 130
 131 void SaverView::paintEvent(QPaintEvent *event)
 132 {
 133     Plasma::View::paintEvent(event);
 134     if (!m_setupMode) {
 135         return;
 136     }
 137
 138     // now draw a little label reminding the user their screen's not quite locked
 139     const QRect r = rect();
 140     const QString text = i18n("Setup Mode - Screen is NOT locked");
 141     QFont f = font();
 142     f.bold();
 143     const QFontMetrics fm(f);
 144     const int margin = 6;
 145     const int textWidth = fm.width(text);
 146     const QPoint centered(r.width() / 2 - textWidth / 2 - margin, r.y());
 147     const QRect boundingBox(centered, QSize(margin * 2 + textWidth, fm.height() + margin * 2));
 148
 149     if (!viewport() || !event->rect().intersects(boundingBox)) {
 150         return;
 151     }
 152
 153     QPainterPath box;
 154     box.moveTo(boundingBox.topLeft());
 155     box.lineTo(boundingBox.bottomLeft() + QPoint(0, -margin * 2));
 156     box.quadTo(boundingBox.bottomLeft(), boundingBox.bottomLeft() + QPoint(margin * 2, 0));
 157     box.lineTo(boundingBox.bottomRight() + QPoint(-margin * 2, 0));
 158     box.quadTo(boundingBox.bottomRight(), boundingBox.bottomRight() + QPoint(0, -margin * 2));
 159     box.lineTo(boundingBox.topRight());
 160     box.closeSubpath();
 161
 162     QPainter painter(viewport());
 163     painter.setRenderHint(QPainter::Antialiasing);
 164     painter.setFont(f);
 165     //kDebug() << "******************** painting from" << centered << boundingBox << rect() << event->rect();
 166     QColor highlight = palette().highlight().color();
 167     highlight.setAlphaF(0.7);
 168     painter.setPen(highlight.darker());
 169     painter.setBrush(highlight);
 170     painter.drawPath(box);
 171     painter.setPen(palette().highlightedText().color());
 172     painter.drawText(boundingBox, Qt::AlignCenter | Qt::AlignVCenter, text);
 173 }
 174
 175 bool SaverView::eventFilter(QObject *watched, QEvent *event)
 176 {
 177     if (watched != m_appletBrowser) {
 178         /*if (event->type() == QEvent::MouseButtonPress) {
 179             QMouseEvent *me = static_cast<QMouseEvent *>(event);
 180             if (me->button() == Qt::LeftButton) {
 181                 hideView();
 182             }
 183         }*/
 184         return false;
 185     }
 186
 187     if (event->type() == QEvent::MouseButtonPress) {
 188         QMouseEvent *me = static_cast<QMouseEvent *>(event);
 189         m_appletBrowserDragStart = me->globalPos();
 190     } else if (event->type() == QEvent::MouseMove && m_appletBrowserDragStart != QPoint()) {
 191         QMouseEvent *me = static_cast<QMouseEvent *>(event);
 192         QPoint newPos = me->globalPos();
 193         QPoint curPos = m_appletBrowser->pos();
 194         int x = curPos.x();
 195         int y = curPos.y();
 196
 197         if (curPos.y() == 0 || curPos.y() + m_appletBrowser->height() >= height()) {
 198            x = curPos.x() + (newPos.x() - m_appletBrowserDragStart.x());
 199            if (x < 0) {
 200                x = 0;
 201            } else if (x + m_appletBrowser->width() > width()) {
 202                x = width() - m_appletBrowser->width();
 203            }
 204         }
 205
 206         if (x == 0 || x + m_appletBrowser->width() >= width()) {
 207             y = m_appletBrowser->y() + (newPos.y() - m_appletBrowserDragStart.y());
 208
 209             if (y < 0) {
 210                 y = 0;
 211             } else if (y + m_appletBrowser->height() > height()) {
 212                 y = height() - m_appletBrowser->height();
 213             }
 214         }
 215         m_appletBrowser->move(x, y);
 216         m_appletBrowserDragStart = newPos;
 217     } else if (event->type() == QEvent::MouseButtonRelease) {
 218         m_appletBrowserDragStart = QPoint();
 219     }
 220
 221     return false;
 222 }
 223
 224 void SaverView::showView()
 225 {
 226     if (isHidden()) {
 227         if (m_suppressShow) {
 228             kDebug() << "show was suppressed";
 229             return;
 230         }
 231
 232         setWindowState(Qt::WindowFullScreen);
 233         //KWindowSystem::setOnAllDesktops(winId(), true);
 234         //KWindowSystem::setState(winId(), NET::KeepAbove|NET::SkipTaskbar);
 235
 236         show();
 237         raise();
 238
 239         m_suppressShow = true;
 240         QTimer::singleShot(SUPPRESS_SHOW_TIMEOUT, this, SLOT(suppressShowTimeout()));
 241     }
 242 }
 243
 244 void SaverView::setContainment(Plasma::Containment *newContainment)
 245 {
 246     if (newContainment == containment()) {
 247         return;
 248     }
 249
 250     if (isVisible()) {
 251         disconnect(containment(), SIGNAL(showAddWidgetsInterface(QPointF)), this, SLOT(showAppletBrowser()));
 252         connect(newContainment, SIGNAL(showAddWidgetsInterface(QPointF)), this, SLOT(showAppletBrowser()));
 253     }
 254
 255     if (m_appletBrowser) {
 256         m_appletBrowser->setContainment(newContainment);
 257     }
 258
 259     View::setContainment(newContainment);
 260 }
 261
 262 void SaverView::hideView()
 263 {
 264     if (isHidden()) {
 265         return;
 266     }
 267     if (m_appletBrowser) {
 268         m_appletBrowser->hide();
 269     }
 270
 271     disconnect(containment(), SIGNAL(showAddWidgetsInterface(QPointF)), this, SLOT(showAppletBrowser()));
 272
 273     containment()->closeToolBox();
 274     hide();
 275     //let the lockprocess know
 276     emit hidden();
 277 }
 278
 279 void SaverView::suppressShowTimeout()
 280 {
 281     kDebug() << "SaverView::suppressShowTimeout";
 282     m_suppressShow = false;
 283 }
 284
 285 void SaverView::keyPressEvent(QKeyEvent *event)
 286 {
 287     /*if (event->key() == Qt::Key_Escape) {
 288         hideView();
 289         event->accept();
 290         return;
 291     }*/
 292
 293     //kDebug() << event->key() << event->spontaneous();
 294     Plasma::View::keyPressEvent(event);
 295 }
 296
 297 //eeeeew. why did dashboard ever have this? wtf!
 298 void SaverView::showEvent(QShowEvent *event)
 299 {
 300     //KWindowSystem::setState(winId(), NET::SkipPager);
 301     connect(containment(), SIGNAL(showAddWidgetsInterface(QPointF)), this, SLOT(showAppletBrowser()));
 302     Plasma::View::showEvent(event);
 303 }
 304
 305 #include "saverview.moc"
 306