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_progressInt(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         m_progressInt = -1;
 104
 105         QDialog::show();
 106         setFixedSize(size());
 107         setText(text);
 108
 109         m_progress->setText(QString());
 110
 111         QApplication::processEvents();
 112 }
 113
 114 bool WorkingBanner::close(void)
 115 {
 116         m_canClose = true;
 117         emit userAbort();
 118         return QDialog::close();
 119 }
 120
 121 void WorkingBanner::show(const QString &text, QThread *thread)
 122 {
 123         //Show splash
 124         this->show(text);
 125
 126         //Create event loop
 127         QEventLoop *loop = new QEventLoop(this);
 128         connect(thread, SIGNAL(finished()), loop, SLOT(quit()));
 129         connect(thread, SIGNAL(terminated()), loop, SLOT(quit()));
 130
 131         //Set taskbar state
 132         WinSevenTaskbar::setOverlayIcon(dynamic_cast<QWidget*>(this->parent()), &QIcon(":/icons/hourglass.png"));
 133         WinSevenTaskbar::setTaskbarState(dynamic_cast<QWidget*>(this->parent()), WinSevenTaskbar::WinSevenTaskbarIndeterminateState);
 134
 135         //Start the thread
 136         thread->start();
 137
 138         //Loop while thread is still running
 139         while(THREAD_RUNNING(thread))
 140         {
 141                 loop->exec();
 142         }
 143
 144         //Set taskbar state
 145         WinSevenTaskbar::setTaskbarState(dynamic_cast<QWidget*>(this->parent()), WinSevenTaskbar::WinSevenTaskbarNoState);
 146         WinSevenTaskbar::setOverlayIcon(dynamic_cast<QWidget*>(this->parent()), NULL);
 147
 148         //Free memory
 149         LAMEXP_DELETE(loop);
 150
 151         //Hide splash
 152         this->close();
 153 }
 154
 155 void WorkingBanner::show(const QString &text, QEventLoop *loop)
 156 {
 157         //Show splash
 158         this->show(text);
 159
 160         //Set taskbar state
 161         WinSevenTaskbar::setOverlayIcon(dynamic_cast<QWidget*>(this->parent()), &QIcon(":/icons/hourglass.png"));
 162         WinSevenTaskbar::setTaskbarState(dynamic_cast<QWidget*>(this->parent()), WinSevenTaskbar::WinSevenTaskbarIndeterminateState);
 163
 164         //Loop while thread is running
 165         loop->exec(QEventLoop::ExcludeUserInputEvents);
 166
 167         //Set taskbar state
 168         WinSevenTaskbar::setTaskbarState(dynamic_cast<QWidget*>(this->parent()), WinSevenTaskbar::WinSevenTaskbarNoState);
 169         WinSevenTaskbar::setOverlayIcon(dynamic_cast<QWidget*>(this->parent()), NULL);
 170
 171         //Hide splash
 172         this->close();
 173 }
 174
 175 ////////////////////////////////////////////////////////////
 176 // EVENTS
 177 ////////////////////////////////////////////////////////////
 178
 179 void WorkingBanner::keyPressEvent(QKeyEvent *event)
 180 {
 181         if(event->key() == Qt::Key_Escape)
 182         {
 183                 qDebug("QT::KEY_ESCAPE pressed!");
 184                 emit userAbort();
 185         }
 186
 187         event->ignore();
 188 }
 189
 190 void WorkingBanner::keyReleaseEvent(QKeyEvent *event)
 191 {
 192         event->ignore();
 193 }
 194
 195 void WorkingBanner::closeEvent(QCloseEvent *event)
 196 {
 197         if(!m_canClose) event->ignore();
 198 }
 199
 200 bool WorkingBanner::winEvent(MSG *message, long *result)
 201 {
 202         return WinSevenTaskbar::handleWinEvent(message, result);
 203 }
 204
 205 ////////////////////////////////////////////////////////////
 206 // SLOTS
 207 ////////////////////////////////////////////////////////////
 208
 209 void WorkingBanner::setText(const QString &text)
 210 {
 211         if(!m_metrics)
 212         {
 213                  m_metrics = new QFontMetrics(labelStatus->font());
 214         }
 215
 216         if(m_metrics->width(text) <= labelStatus->width())
 217         {
 218                 labelStatus->setText(text);
 219         }
 220         else
 221         {
 222                 QString choppedText = text.simplified().append("...");
 223                 while((m_metrics->width(choppedText) > labelStatus->width()) && (choppedText.length() > 8))
 224                 {
 225                         choppedText.chop(4);
 226                         choppedText = choppedText.trimmed();
 227                         choppedText.append("...");
 228                 }
 229                 labelStatus->setText(choppedText);
 230         }
 231         if(this->isVisible())
 232         {
 233                 labelStatus->repaint();
 234         }
 235 }
 236
 237 void WorkingBanner::setProgressMax(unsigned int max)
 238 {
 239         m_progressMax = max;
 240         updateProgress();
 241 }
 242
 243 void WorkingBanner::setProgressVal(unsigned int val)
 244 {
 245         m_progressVal = val;
 246         updateProgress();
 247 }
 248
 249 ////////////////////////////////////////////////////////////
 250 // Private
 251 ////////////////////////////////////////////////////////////
 252
 253 void WorkingBanner::updateProgress(void)
 254 {
 255         if(m_progressMax > 0)
 256         {
 257                 int newProgress = qRound(qBound(0.0, static_cast<double>(m_progressVal) / static_cast<double>(m_progressMax), 1.0) * 100.0);
 258                 if(m_progressInt != newProgress)
 259                 {
 260                         m_progressInt = newProgress;
 261                         m_progress->setText(QString::number(m_progressInt));
 262                         if(this->isVisible())
 263                         {
 264                                 labelStatus->repaint();
 265                         }
 266                 }
 267         }
 268 }