src/Dialog_SplashScreen.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // LameXP - Audio Encoder Front-End
   3 // Copyright (C) 2004-2012 LoRd_MuldeR <MuldeR2@GMX.de>
   4 //
   5 // This program is free software; you can redistribute it and/or modify
   6 // it under the terms of the GNU General Public License as published by
   7 // the Free Software Foundation; either version 2 of the License, or
   8 // (at your option) any later version.
   9 //
  10 // This program is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14 //
  15 // You should have received a copy of the GNU General Public License along
  16 // with this program; if not, write to the Free Software Foundation, Inc.,
  17 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 //
  19 // http://www.gnu.org/licenses/gpl-2.0.txt
  20 ///////////////////////////////////////////////////////////////////////////////
  21
  22 #include "Dialog_SplashScreen.h"
  23
  24 #include "Global.h"
  25
  26 #include <QThread>
  27 #include <QMovie>
  28 #include <QKeyEvent>
  29 #include <QTimer>
  30
  31 #include "WinSevenTaskbar.h"
  32
  33 #define FADE_DELAY 16
  34 #define OPACITY_DELTA 0.02
  35
  36 #define THREAD_RUNNING(THRD) (((THRD)->isRunning()) ? (!((THRD)->wait(50))) : false)
  37
  38 ////////////////////////////////////////////////////////////
  39 // Constructor
  40 ////////////////////////////////////////////////////////////
  41
  42 SplashScreen::SplashScreen(QWidget *parent)
  43 :
  44         QFrame(parent, Qt::CustomizeWindowHint | Qt::WindowStaysOnTopHint)
  45 {
  46         //Init the dialog, from the .ui file
  47         setupUi(this);
  48
  49         //Start animation
  50         m_working = new QMovie(":/images/Loading.gif");
  51         labelLoading->setMovie(m_working);
  52         m_working->start();
  53
  54         //Set wait cursor
  55         setCursor(Qt::WaitCursor);
  56
  57         //Prevent close
  58         m_canClose = false;
  59 }
  60
  61 ////////////////////////////////////////////////////////////
  62 // Destructor
  63 ////////////////////////////////////////////////////////////
  64
  65 SplashScreen::~SplashScreen(void)
  66 {
  67         if(m_working)
  68         {
  69                 m_working->stop();
  70                 delete m_working;
  71                 m_working = NULL;
  72         }
  73 }
  74
  75 ////////////////////////////////////////////////////////////
  76 // PUBLIC FUNCTIONS
  77 ////////////////////////////////////////////////////////////
  78
  79 void SplashScreen::showSplash(QThread *thread)
  80 {
  81         double opacity = OPACITY_DELTA;
  82         const int opacitySteps = qRound(1.0 / OPACITY_DELTA);
  83         SplashScreen *splashScreen = new SplashScreen();
  84
  85         //Show splash
  86         splashScreen->m_canClose = false;
  87         splashScreen->setWindowOpacity(opacity);
  88         splashScreen->setFixedSize(splashScreen->size());
  89         splashScreen->show();
  90
  91         //Wait for window to show
  92         QApplication::processEvents(QEventLoop::ExcludeUserInputEvents);
  93         splashScreen->repaint();
  94         QApplication::processEvents(QEventLoop::ExcludeUserInputEvents);
  95
  96         //Setup the event loop
  97         QEventLoop *loop = new QEventLoop(splashScreen);
  98         connect(thread, SIGNAL(terminated()), loop, SLOT(quit()), Qt::QueuedConnection);
  99         connect(thread, SIGNAL(finished()), loop, SLOT(quit()), Qt::QueuedConnection);
 100
 101         //Create timer
 102         QTimer *timer = new QTimer();
 103         connect(timer, SIGNAL(timeout()), loop, SLOT(quit()));
 104
 105         //Start thread
 106         QApplication::processEvents(QEventLoop::ExcludeUserInputEvents);
 107         thread->start();
 108         QApplication::processEvents(QEventLoop::ExcludeUserInputEvents);
 109
 110         //Init taskbar
 111         WinSevenTaskbar::setTaskbarState(splashScreen, WinSevenTaskbar::WinSevenTaskbarIndeterminateState);
 112
 113         //Fade in
 114         for(int i = 1; i <= opacitySteps; i++)
 115         {
 116                 opacity = OPACITY_DELTA * static_cast<double>(i);
 117                 splashScreen->setWindowOpacity(opacity);
 118                 QApplication::processEvents(QEventLoop::ExcludeUserInputEvents, FADE_DELAY);
 119                 Sleep(FADE_DELAY);
 120         }
 121
 122         //Start the timer
 123         timer->start(30720);
 124
 125         //Loop while thread is still running
 126         if(bool bIsRunning = THREAD_RUNNING(thread))
 127         {
 128                 while(bIsRunning)
 129                 {
 130                         loop->exec();
 131                         if(bIsRunning = THREAD_RUNNING(thread))
 132                         {
 133                                 qWarning("Potential deadlock in initialization thread!");
 134                         }
 135                 }
 136         }
 137
 138         //Stop the timer
 139         timer->stop();
 140
 141         //Fade out
 142         for(int i = opacitySteps; i >= 0; i--)
 143         {
 144                 opacity = OPACITY_DELTA * static_cast<double>(i);
 145                 splashScreen->setWindowOpacity(opacity);
 146                 QApplication::processEvents(QEventLoop::ExcludeUserInputEvents, FADE_DELAY);
 147                 Sleep(FADE_DELAY);
 148         }
 149
 150         //Restore taskbar
 151         WinSevenTaskbar::setTaskbarState(splashScreen, WinSevenTaskbar::WinSevenTaskbarNoState);
 152
 153         //Hide splash
 154         splashScreen->m_canClose = true;
 155         splashScreen->close();
 156
 157         //Free
 158         LAMEXP_DELETE(loop);
 159         LAMEXP_DELETE(timer);
 160         LAMEXP_DELETE(splashScreen);
 161 }
 162
 163 ////////////////////////////////////////////////////////////
 164 // EVENTS
 165 ////////////////////////////////////////////////////////////
 166
 167 void SplashScreen::keyPressEvent(QKeyEvent *event)
 168 {
 169         event->ignore();
 170 }
 171
 172 void SplashScreen::keyReleaseEvent(QKeyEvent *event)
 173 {
 174         event->ignore();
 175 }
 176
 177 void SplashScreen::closeEvent(QCloseEvent *event)
 178 {
 179         if(!m_canClose) event->ignore();
 180 }
 181
 182 bool SplashScreen::winEvent(MSG *message, long *result)
 183 {
 184         return WinSevenTaskbar::handleWinEvent(message, result);
 185 }