src/GUI.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // MuldeR's Utilities for Qt
   3 // Copyright (C) 2004-2017 LoRd_MuldeR <MuldeR2@GMX.de>
   4 //
   5 // This library is free software; you can redistribute it and/or
   6 // modify it under the terms of the GNU Lesser General Public
   7 // License as published by the Free Software Foundation; either
   8 // version 2.1 of the License, or (at your option) any later version.
   9 //
  10 // This library 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 GNU
  13 // Lesser General Public License for more details.
  14 //
  15 // You should have received a copy of the GNU Lesser General Public
  16 // License along with this library; if not, write to the Free Software
  17 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  18 //
  19 // http://www.gnu.org/licenses/lgpl-2.1.txt
  20 //////////////////////////////////////////////////////////////////////////////////
  21
  22 //MUtils
  23 #include <MUtils/GUI.h>
  24 #include <MUtils/OSSupport.h>
  25
  26 //Internal
  27 #include "Utils_Win32.h"
  28
  29 //Qt
  30 #include <QIcon>
  31 #include <QApplication>
  32 #include <QWidget>
  33 #include <QMutex>
  34 #include <QDesktopWidget>
  35
  36 //Win32 API
  37 #ifndef _INC_WINDOWS
  38 #define WIN32_LEAN_AND_MEAN 1
  39 #include <Windows.h>
  40 #endif //_INC_WINDOWS
  41
  42 ///////////////////////////////////////////////////////////////////////////////
  43 // BROADCAST
  44 ///////////////////////////////////////////////////////////////////////////////
  45
  46 bool MUtils::GUI::broadcast(int eventType, const bool &onlyToVisible)
  47 {
  48         if(QApplication *app = dynamic_cast<QApplication*>(QApplication::instance()))
  49         {
  50                 qDebug("Broadcasting %d", eventType);
  51
  52                 bool allOk = true;
  53                 QEvent poEvent(static_cast<QEvent::Type>(eventType));
  54                 QWidgetList list = app->topLevelWidgets();
  55
  56                 while(!list.isEmpty())
  57                 {
  58                         QWidget *widget = list.takeFirst();
  59                         if(!onlyToVisible || widget->isVisible())
  60                         {
  61                                 if(!app->sendEvent(widget, &poEvent))
  62                                 {
  63                                         allOk = false;
  64                                 }
  65                         }
  66                 }
  67
  68                 qDebug("Broadcast %d done (%s)", eventType, (allOk ? "OK" : "Stopped"));
  69                 return allOk;
  70         }
  71         else
  72         {
  73                 qWarning("Broadcast failed, could not get QApplication instance!");
  74                 return false;
  75         }
  76 }
  77
  78 ///////////////////////////////////////////////////////////////////////////////
  79 // WINDOW ICON
  80 ///////////////////////////////////////////////////////////////////////////////
  81
  82 namespace MUtils
  83 {
  84         namespace GUI
  85         {
  86                 namespace Internal
  87                 {
  88                 class WindowIconHelper : public QObject
  89                 {
  90                 public:
  91                         WindowIconHelper(QWidget *const parent, const HICON hIcon, const bool &bIsBigIcon)
  92                                 :
  93                                 QObject(parent),
  94                                 m_hIcon(hIcon)
  95                         {
  96                                 SendMessage(reinterpret_cast<HWND>(parent->winId()), WM_SETICON, (bIsBigIcon ? ICON_BIG : ICON_SMALL), LPARAM(hIcon));
  97                         }
  98
  99                         virtual ~WindowIconHelper(void)
 100                         {
 101                                 if (m_hIcon)
 102                                 {
 103                                         DestroyIcon(m_hIcon);
 104                                 }
 105                         }
 106
 107                 private:
 108                         const HICON m_hIcon;
 109                 };
 110                 }
 111         }
 112 }
 113
 114 bool MUtils::GUI::set_window_icon(QWidget *const window, const QIcon &icon, const bool bIsBigIcon)
 115 {
 116         if ((!icon.isNull()) && window->winId())
 117         {
 118                 const int extend = (bIsBigIcon ? 32 : 16);
 119                 if (const HICON hIcon = (HICON)MUtils::Win32Utils::qicon_to_hicon(&icon, extend, extend))
 120                 {
 121                         new Internal::WindowIconHelper(window, hIcon, bIsBigIcon); /*will be free'd using QObject parent mechanism*/
 122                         return true;
 123                 }
 124         }
 125         return false;
 126 }
 127
 128 ///////////////////////////////////////////////////////////////////////////////
 129 // BLINK WINDOW
 130 ///////////////////////////////////////////////////////////////////////////////
 131
 132 static QMutex g_blinkMutex;
 133
 134 void MUtils::GUI::blink_window(QWidget *const poWindow, const unsigned int &count, const unsigned int &delay)
 135 {
 136         const double maxOpac = 1.0;
 137         const double minOpac = 0.3;
 138         const double delOpac = 0.1;
 139
 140         if (!g_blinkMutex.tryLock())
 141         {
 142                 qWarning("Blinking is already in progress, skipping!");
 143                 return;
 144         }
 145
 146         try
 147         {
 148                 const int steps = static_cast<int>(ceil(maxOpac - minOpac) / delOpac);
 149                 const int sleep = static_cast<int>(floor(static_cast<double>(delay) / static_cast<double>(steps)));
 150                 const double opacity = poWindow->windowOpacity();
 151
 152                 for (unsigned int i = 0; i < count; i++)
 153                 {
 154                         for (double x = maxOpac; x >= minOpac; x -= delOpac)
 155                         {
 156                                 poWindow->setWindowOpacity(x);
 157                                 QApplication::processEvents(QEventLoop::ExcludeUserInputEvents);
 158                                 MUtils::OS::sleep_ms(sleep);
 159                         }
 160
 161                         for (double x = minOpac; x <= maxOpac; x += delOpac)
 162                         {
 163                                 poWindow->setWindowOpacity(x);
 164                                 QApplication::processEvents(QEventLoop::ExcludeUserInputEvents);
 165                                 MUtils::OS::sleep_ms(sleep);
 166                         }
 167                 }
 168
 169                 poWindow->setWindowOpacity(opacity);
 170                 QApplication::processEvents(QEventLoop::ExcludeUserInputEvents);
 171         }
 172         catch (...)
 173         {
 174                 qWarning("Exception error while blinking!");
 175         }
 176
 177         g_blinkMutex.unlock();
 178 }
 179
 180 ///////////////////////////////////////////////////////////////////////////////
 181 // DPI SCALING
 182 ///////////////////////////////////////////////////////////////////////////////
 183
 184 double MUtils::GUI::dpi_scale(void)
 185 {
 186         if (const QApplication *const app = dynamic_cast<QApplication*>(QCoreApplication::instance()))
 187         {
 188                 const double dpiX = static_cast<double>(app->desktop()->logicalDpiX());
 189                 const double dpiY = static_cast<double>(app->desktop()->logicalDpiY());
 190                 return qBound(1.0, ((dpiX + dpiY) / 192.0), 2.0);
 191         }
 192         return -1.0;
 193 }
 194
 195 bool MUtils::GUI::scale_widget(QWidget *const widget, const bool recenter)
 196 {
 197         if (widget && (!widget->parentWidget()))
 198         {
 199                 const double dpiScale = dpi_scale();
 200                 if ((dpiScale > 0.0) && (!qFuzzyCompare(dpiScale, 1.0)))
 201                 {
 202                         const QSize originalSize = widget->size();
 203                         widget->resize(qRound(originalSize.width() * dpiScale), qRound(originalSize.height() * dpiScale));
 204                         return recenter ? center_widget(widget) : true;
 205                 }
 206         }
 207         return false;
 208 }
 209
 210 bool MUtils::GUI::center_widget(QWidget *const widget)
 211 {
 212         if (widget && (!widget->parentWidget()))
 213         {
 214                 const QRect desktopRect = QApplication::desktop()->screenGeometry();
 215                 const QRect thisRect = widget->geometry();
 216                 widget->move((desktopRect.width() - thisRect.width()) / 2, (desktopRect.height() - thisRect.height()) / 2);
 217                 return true;
 218         }
 219         return false;
 220 }
 221
 222 ///////////////////////////////////////////////////////////////////////////////
 223 // FORCE QUIT
 224 ///////////////////////////////////////////////////////////////////////////////
 225
 226 void MUtils::GUI::force_quit(void)
 227 {
 228         qApp->closeAllWindows();
 229         qApp->quit();
 230 }
 231
 232 ///////////////////////////////////////////////////////////////////////////////