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 /* It can happen that the QThread has just terminated and already emitted the 'terminated' signal, but did NOT change the 'isRunning' flag to FALSE yet. */
  37 /* For this reason the macro will first check the 'isRunning' flag. If (and only if) the flag still returns TRUE, then we will wait() for at most 50 ms. */
  38 /* If, after 50 ms, the wait() function returns with FALSE, then the thread probably is still running and we return TRUE. Otherwise we can return FALSE. */
  39 #define THREAD_RUNNING(THRD) (((THRD)->isRunning()) ? (!((THRD)->wait(50))) : false)
  40
  41
  42 ////////////////////////////////////////////////////////////
  43 // Constructor
  44 ////////////////////////////////////////////////////////////
  45
  46 SplashScreen::SplashScreen(QWidget *parent)
  47 :
  48         QFrame(parent, Qt::CustomizeWindowHint | Qt::WindowStaysOnTopHint)
  49 {
  50         //Init the dialog, from the .ui file
  51         setupUi(this);
  52
  53         //Start animation
  54         m_working = new QMovie(":/images/Loading.gif");
  55         labelLoading->setMovie(m_working);
  56         m_working->start();
  57
  58         //Set wait cursor
  59         setCursor(Qt::WaitCursor);
  60
  61         //Prevent close
  62         m_canClose = false;
  63 }
  64
  65 ////////////////////////////////////////////////////////////
  66 // Destructor
  67 ////////////////////////////////////////////////////////////
  68
  69 SplashScreen::~SplashScreen(void)
  70 {
  71         if(m_working)
  72         {
  73                 m_working->stop();
  74                 delete m_working;
  75                 m_working = NULL;
  76         }
  77 }
  78
  79 ////////////////////////////////////////////////////////////
  80 // PUBLIC FUNCTIONS
  81 ////////////////////////////////////////////////////////////
  82
  83 void SplashScreen::showSplash(QThread *thread)
  84 {
  85         double opacity = OPACITY_DELTA;
  86         const int opacitySteps = qRound(1.0 / OPACITY_DELTA);
  87         SplashScreen *splashScreen = new SplashScreen();
  88
  89         //Show splash
  90         splashScreen->m_canClose = false;
  91         splashScreen->setWindowOpacity(opacity);
  92         splashScreen->setFixedSize(splashScreen->size());
  93         splashScreen->show();
  94
  95         //Wait for window to show
  96         QApplication::processEvents(QEventLoop::ExcludeUserInputEvents);
  97         splashScreen->repaint();
  98         QApplication::processEvents(QEventLoop::ExcludeUserInputEvents);
  99
 100         //Setup the event loop
 101         QEventLoop *loop = new QEventLoop(splashScreen);
 102         connect(thread, SIGNAL(terminated()), loop, SLOT(quit()), Qt::QueuedConnection);
 103         connect(thread, SIGNAL(finished()), loop, SLOT(quit()), Qt::QueuedConnection);
 104
 105         //Create timer
 106         QTimer *timer = new QTimer();
 107         connect(timer, SIGNAL(timeout()), loop, SLOT(quit()));
 108
 109         //Start thread
 110         QApplication::processEvents(QEventLoop::ExcludeUserInputEvents);
 111         thread->start();
 112         QApplication::processEvents(QEventLoop::ExcludeUserInputEvents);
 113
 114         //Init taskbar
 115         WinSevenTaskbar::setTaskbarState(splashScreen, WinSevenTaskbar::WinSevenTaskbarIndeterminateState);
 116
 117         //Fade in
 118         for(int i = 1; i <= opacitySteps; i++)
 119         {
 120                 opacity = OPACITY_DELTA * static_cast<double>(i);
 121                 splashScreen->setWindowOpacity(opacity);
 122                 QApplication::processEvents(QEventLoop::ExcludeUserInputEvents, FADE_DELAY);
 123                 Sleep(FADE_DELAY);
 124         }
 125
 126         //Start the timer
 127         timer->start(30720);
 128
 129         //Loop while thread is still running
 130         if(bool bIsRunning = THREAD_RUNNING(thread))
 131         {
 132                 while(bIsRunning)
 133                 {
 134                         loop->exec();
 135                         if(bIsRunning = THREAD_RUNNING(thread))
 136                         {
 137                                 qWarning("Potential deadlock in initialization thread!");
 138                         }
 139                 }
 140         }
 141
 142         //Stop the timer
 143         timer->stop();
 144
 145         //Fade out
 146         for(int i = opacitySteps; i >= 0; i--)
 147         {
 148                 opacity = OPACITY_DELTA * static_cast<double>(i);
 149                 splashScreen->setWindowOpacity(opacity);
 150                 QApplication::processEvents(QEventLoop::ExcludeUserInputEvents, FADE_DELAY);
 151                 Sleep(FADE_DELAY);
 152         }
 153
 154         //Restore taskbar
 155         WinSevenTaskbar::setTaskbarState(splashScreen, WinSevenTaskbar::WinSevenTaskbarNoState);
 156
 157         //Hide splash
 158         splashScreen->m_canClose = true;
 159         splashScreen->close();
 160
 161         //Free
 162         LAMEXP_DELETE(loop);
 163         LAMEXP_DELETE(timer);
 164         LAMEXP_DELETE(splashScreen);
 165 }
 166
 167 ////////////////////////////////////////////////////////////
 168 // EVENTS
 169 ////////////////////////////////////////////////////////////
 170
 171 void SplashScreen::keyPressEvent(QKeyEvent *event)
 172 {
 173         event->ignore();
 174 }
 175
 176 void SplashScreen::keyReleaseEvent(QKeyEvent *event)
 177 {
 178         event->ignore();
 179 }
 180
 181 void SplashScreen::closeEvent(QCloseEvent *event)
 182 {
 183         if(!m_canClose) event->ignore();
 184 }
 185
 186 bool SplashScreen::winEvent(MSG *message, long *result)
 187 {
 188         return WinSevenTaskbar::handleWinEvent(message, result);
 189 }