src/Dialog_SplashScreen.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // LameXP - Audio Encoder Front-End
   3 // Copyright (C) 2004-2013 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 #define SET_TASKBAR_STATE(FLAG) do \
  42 { \
  43         if(FLAG) \
  44         { \
  45                 if(!bTaskBar) bTaskBar = WinSevenTaskbar::setTaskbarState(splashScreen, WinSevenTaskbar::WinSevenTaskbarIndeterminateState); \
  46         } \
  47         else \
  48         { \
  49                 if(bTaskBar) bTaskBar = (!WinSevenTaskbar::setTaskbarState(splashScreen, WinSevenTaskbar::WinSevenTaskbarNoState)); \
  50         } \
  51 } \
  52 while(0)
  53
  54 ////////////////////////////////////////////////////////////
  55 // Constructor
  56 ////////////////////////////////////////////////////////////
  57
  58 SplashScreen::SplashScreen(QWidget *parent)
  59 :
  60         QFrame(parent, Qt::CustomizeWindowHint | Qt::WindowStaysOnTopHint)
  61 {
  62         //Init the dialog, from the .ui file
  63         setupUi(this);
  64
  65         //Start animation
  66         m_working = new QMovie(":/images/Loading.gif");
  67         labelLoading->setMovie(m_working);
  68         m_working->start();
  69
  70         //Set wait cursor
  71         setCursor(Qt::WaitCursor);
  72
  73         //Prevent close
  74         m_canClose = false;
  75 }
  76
  77 ////////////////////////////////////////////////////////////
  78 // Destructor
  79 ////////////////////////////////////////////////////////////
  80
  81 SplashScreen::~SplashScreen(void)
  82 {
  83         if(m_working)
  84         {
  85                 m_working->stop();
  86                 delete m_working;
  87                 m_working = NULL;
  88         }
  89 }
  90
  91 ////////////////////////////////////////////////////////////
  92 // PUBLIC FUNCTIONS
  93 ////////////////////////////////////////////////////////////
  94
  95 void SplashScreen::showSplash(QThread *thread)
  96 {
  97         double opacity = OPACITY_DELTA;
  98         const int opacitySteps = qRound(1.0 / OPACITY_DELTA);
  99         SplashScreen *splashScreen = new SplashScreen();
 100         bool bTaskBar = false;
 101
 102         //Show splash
 103         splashScreen->m_canClose = false;
 104         splashScreen->setWindowOpacity(opacity);
 105         splashScreen->setFixedSize(splashScreen->size());
 106         splashScreen->show();
 107
 108         //Wait for window to show
 109         QApplication::processEvents(QEventLoop::ExcludeUserInputEvents);
 110         splashScreen->repaint();
 111         QApplication::processEvents(QEventLoop::ExcludeUserInputEvents);
 112
 113         //Setup the event loop
 114         QEventLoop *loop = new QEventLoop(splashScreen);
 115         connect(thread, SIGNAL(terminated()), loop, SLOT(quit()), Qt::QueuedConnection);
 116         connect(thread, SIGNAL(finished()), loop, SLOT(quit()), Qt::QueuedConnection);
 117
 118         //Create timer
 119         QTimer *timer = new QTimer();
 120         connect(timer, SIGNAL(timeout()), loop, SLOT(quit()));
 121
 122         //Start thread
 123         QApplication::processEvents(QEventLoop::ExcludeUserInputEvents);
 124         thread->start();
 125         QApplication::processEvents(QEventLoop::ExcludeUserInputEvents);
 126
 127         //Init taskbar
 128         SET_TASKBAR_STATE(true);
 129
 130         //Fade in
 131         for(int i = 1; i <= opacitySteps; i++)
 132         {
 133                 opacity = (i < opacitySteps) ? (OPACITY_DELTA * static_cast<double>(i)) : 1.0;
 134                 splashScreen->setWindowOpacity(opacity);
 135                 splashScreen->update();
 136                 QApplication::processEvents(QEventLoop::ExcludeUserInputEvents, FADE_DELAY);
 137                 SET_TASKBAR_STATE(true);
 138                 lamexp_sleep(FADE_DELAY);
 139         }
 140
 141         //Start the timer
 142         timer->start(30720);
 143
 144         //Loop while thread is still running
 145         if(bool bIsRunning = THREAD_RUNNING(thread))
 146         {
 147                 int deadlockCounter = 0;
 148                 while(bIsRunning)
 149                 {
 150                         loop->exec();
 151                         if(bIsRunning = THREAD_RUNNING(thread))
 152                         {
 153                                 qWarning("Potential deadlock in initialization thread!");
 154                                 if(++deadlockCounter >= 10) qFatal("Deadlock in initialization thread!");
 155                         }
 156                 }
 157         }
 158
 159         //Stop the timer
 160         timer->stop();
 161
 162         //Fade out
 163         for(int i = opacitySteps; i >= 0; i--)
 164         {
 165                 opacity = OPACITY_DELTA * static_cast<double>(i);
 166                 splashScreen->setWindowOpacity(opacity);
 167                 splashScreen->update();
 168                 QApplication::processEvents(QEventLoop::ExcludeUserInputEvents, FADE_DELAY);
 169                 lamexp_sleep(FADE_DELAY);
 170         }
 171
 172         //Restore taskbar
 173         SET_TASKBAR_STATE(false);
 174
 175         //Hide splash
 176         splashScreen->m_canClose = true;
 177         splashScreen->close();
 178
 179         //Free
 180         LAMEXP_DELETE(loop);
 181         LAMEXP_DELETE(timer);
 182         LAMEXP_DELETE(splashScreen);
 183 }
 184
 185 ////////////////////////////////////////////////////////////
 186 // EVENTS
 187 ////////////////////////////////////////////////////////////
 188
 189 void SplashScreen::keyPressEvent(QKeyEvent *event)
 190 {
 191         event->ignore();
 192 }
 193
 194 void SplashScreen::keyReleaseEvent(QKeyEvent *event)
 195 {
 196         event->ignore();
 197 }
 198
 199 void SplashScreen::closeEvent(QCloseEvent *event)
 200 {
 201         if(!m_canClose) event->ignore();
 202 }
 203
 204 bool SplashScreen::winEvent(MSG *message, long *result)
 205 {
 206         return WinSevenTaskbar::handleWinEvent(message, result);
 207 }