src/Dialog_WorkingBanner.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_WorkingBanner.h"
  23
  24 #include "Global.h"
  25 #include "WinSevenTaskbar.h"
  26
  27 #include <QThread>
  28 #include <QMovie>
  29 #include <QKeyEvent>
  30 #include <QFontMetrics>
  31
  32 #define EPS (1.0E-5)
  33
  34 /* 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. */
  35 /* 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. */
  36 /* 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. */
  37 #define THREAD_RUNNING(THRD) (((THRD)->isRunning()) ? (!((THRD)->wait(50))) : false)
  38
  39 ////////////////////////////////////////////////////////////
  40 // Constructor
  41 ////////////////////////////////////////////////////////////
  42
  43 WorkingBanner::WorkingBanner(QWidget *parent)
  44 :
  45         QDialog(parent, Qt::CustomizeWindowHint | Qt::WindowStaysOnTopHint),
  46         m_progressMax(0), m_progressVal(0), m_metrics(NULL)
  47 {
  48         //Init the dialog, from the .ui file
  49         setupUi(this);
  50         setModal(true);
  51
  52         //Start animation
  53         m_working = new QMovie(":/images/Busy.gif");
  54         m_working->setSpeed(50);
  55         labelWorking->setMovie(m_working);
  56         m_working->start();
  57
  58         //Create progress indicator
  59         m_progress = new QLabel(labelWorking);
  60         m_progress->setAlignment(Qt::AlignHCenter | Qt::AlignVCenter);
  61         m_progress->move(0, 0);
  62         m_progress->resize(labelWorking->size());
  63
  64         //Set font size
  65         QFont font = m_progress->font();
  66         font.setPointSize(6);
  67         m_progress->setFont(font);
  68
  69         //Set font color
  70         QPalette color = m_progress->palette();
  71         color.setColor(QPalette::Text, QColor::fromRgb(0x33, 0x33, 0x33));
  72         color.setColor(QPalette::WindowText, QColor::fromRgb(0x33, 0x33, 0x33));
  73         m_progress->setPalette(color);
  74
  75         //Set wait cursor
  76         setCursor(Qt::WaitCursor);
  77 }
  78
  79 ////////////////////////////////////////////////////////////
  80 // Destructor
  81 ////////////////////////////////////////////////////////////
  82
  83 WorkingBanner::~WorkingBanner(void)
  84 {
  85         if(m_working)
  86         {
  87                 m_working->stop();
  88                 delete m_working;
  89                 m_working = NULL;
  90         }
  91
  92         LAMEXP_DELETE(m_progress);
  93         LAMEXP_DELETE(m_metrics);
  94 }
  95
  96 ////////////////////////////////////////////////////////////
  97 // PUBLIC FUNCTIONS
  98 ////////////////////////////////////////////////////////////
  99
 100 void WorkingBanner::show(const QString &text)
 101 {
 102         m_canClose = false;
 103         QDialog::show();
 104         setFixedSize(size());
 105         setText(text);
 106
 107         m_progress->setText(QString());
 108
 109         QApplication::processEvents();
 110 }
 111
 112 bool WorkingBanner::close(void)
 113 {
 114         m_canClose = true;
 115         emit userAbort();
 116         return QDialog::close();
 117 }
 118
 119 void WorkingBanner::show(const QString &text, QThread *thread)
 120 {
 121         //Show splash
 122         this->show(text);
 123
 124         //Create event loop
 125         QEventLoop *loop = new QEventLoop(this);
 126         connect(thread, SIGNAL(finished()), loop, SLOT(quit()));
 127         connect(thread, SIGNAL(terminated()), loop, SLOT(quit()));
 128
 129         //Set taskbar state
 130         WinSevenTaskbar::setOverlayIcon(dynamic_cast<QWidget*>(this->parent()), &QIcon(":/icons/hourglass.png"));
 131         WinSevenTaskbar::setTaskbarState(dynamic_cast<QWidget*>(this->parent()), WinSevenTaskbar::WinSevenTaskbarIndeterminateState);
 132
 133         //Start the thread
 134         thread->start();
 135
 136         //Loop while thread is still running
 137         while(THREAD_RUNNING(thread))
 138         {
 139                 loop->exec();
 140         }
 141
 142         //Set taskbar state
 143         WinSevenTaskbar::setTaskbarState(dynamic_cast<QWidget*>(this->parent()), WinSevenTaskbar::WinSevenTaskbarNoState);
 144         WinSevenTaskbar::setOverlayIcon(dynamic_cast<QWidget*>(this->parent()), NULL);
 145
 146         //Free memory
 147         LAMEXP_DELETE(loop);
 148
 149         //Hide splash
 150         this->close();
 151 }
 152
 153 void WorkingBanner::show(const QString &text, QEventLoop *loop)
 154 {
 155         //Show splash
 156         this->show(text);
 157
 158         //Set taskbar state
 159         WinSevenTaskbar::setOverlayIcon(dynamic_cast<QWidget*>(this->parent()), &QIcon(":/icons/hourglass.png"));
 160         WinSevenTaskbar::setTaskbarState(dynamic_cast<QWidget*>(this->parent()), WinSevenTaskbar::WinSevenTaskbarIndeterminateState);
 161
 162         //Loop while thread is running
 163         loop->exec(QEventLoop::ExcludeUserInputEvents);
 164
 165         //Set taskbar state
 166         WinSevenTaskbar::setTaskbarState(dynamic_cast<QWidget*>(this->parent()), WinSevenTaskbar::WinSevenTaskbarNoState);
 167         WinSevenTaskbar::setOverlayIcon(dynamic_cast<QWidget*>(this->parent()), NULL);
 168
 169         //Hide splash
 170         this->close();
 171 }
 172
 173 ////////////////////////////////////////////////////////////
 174 // EVENTS
 175 ////////////////////////////////////////////////////////////
 176
 177 void WorkingBanner::keyPressEvent(QKeyEvent *event)
 178 {
 179         if(event->key() == Qt::Key_Escape)
 180         {
 181                 qDebug("QT::KEY_ESCAPE pressed!");
 182                 emit userAbort();
 183         }
 184
 185         event->ignore();
 186 }
 187
 188 void WorkingBanner::keyReleaseEvent(QKeyEvent *event)
 189 {
 190         event->ignore();
 191 }
 192
 193 void WorkingBanner::closeEvent(QCloseEvent *event)
 194 {
 195         if(!m_canClose) event->ignore();
 196 }
 197
 198 bool WorkingBanner::winEvent(MSG *message, long *result)
 199 {
 200         return WinSevenTaskbar::handleWinEvent(message, result);
 201 }
 202
 203 ////////////////////////////////////////////////////////////
 204 // SLOTS
 205 ////////////////////////////////////////////////////////////
 206
 207 void WorkingBanner::setText(const QString &text)
 208 {
 209         if(!m_metrics)
 210         {
 211                  m_metrics = new QFontMetrics(labelStatus->font());
 212         }
 213
 214         if(m_metrics->width(text) <= labelStatus->width())
 215         {
 216                 labelStatus->setText(text);
 217         }
 218         else
 219         {
 220                 QString choppedText = text.simplified().append("...");
 221                 while((m_metrics->width(choppedText) > labelStatus->width()) && (choppedText.length() > 8))
 222                 {
 223                         choppedText.chop(4);
 224                         choppedText = choppedText.trimmed();
 225                         choppedText.append("...");
 226                 }
 227                 labelStatus->setText(choppedText);
 228         }
 229         /*
 230         if(this->isVisible())
 231         {
 232                 QApplication::processEvents(QEventLoop::ExcludeUserInputEvents);
 233         }
 234         */
 235 }
 236
 237 void WorkingBanner::setProgressMax(unsigned int max)
 238 {
 239         m_progressMax = max;
 240 }
 241
 242 void WorkingBanner::setProgressVal(unsigned int val)
 243 {
 244         m_progressVal = val;
 245         if(m_progressMax > 0)
 246         {
 247                 int progress = qRound(qBound(0.0, static_cast<double>(m_progressVal) / static_cast<double>(m_progressMax), 1.0) * 100.0);
 248                 m_progress->setText(QString::number(progress));
 249         }
 250 }