src/frontends/qt4/GuiApplication.C

   1 /**
   2  * \file qt4/GuiApplication.C
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author unknown
   7  * \author John Levon
   8  * \author Abdelrazak Younes
   9  *
  10  * Full author contact details are available in file CREDITS.
  11  */
  12
  13 #include <config.h>
  14
  15 #include "GuiApplication.h"
  16
  17 #include "qt_helpers.h"
  18 #include "QLImage.h"
  19 #include "socket_callback.h"
  20
  21 #include "frontends/LyXView.h"
  22
  23 #include "graphics/LoaderQueue.h"
  24
  25 #include "support/lstrings.h"
  26 #include "support/os.h"
  27 #include "support/package.h"
  28
  29 #include "BufferView.h"
  30 #include "Color.h"
  31 #include "debug.h"
  32 #include "funcrequest.h"
  33 #include "lyx_main.h"
  34 #include "lyxfunc.h"
  35 #include "lyxrc.h"
  36
  37 #include <QApplication>
  38 #include <QClipboard>
  39 #include <QEventLoop>
  40 #include <QFileOpenEvent>
  41 #include <QLocale>
  42 #include <QLibraryInfo>
  43 #include <QTextCodec>
  44 #include <QTimer>
  45 #include <QTranslator>
  46 #include <QWidget>
  47
  48 #ifdef Q_WS_X11
  49 #include <X11/Xatom.h>
  50 #include <X11/Xlib.h>
  51 #endif
  52
  53 #include <boost/bind.hpp>
  54
  55 #include <exception>
  56
  57 using std::string;
  58 using std::endl;
  59
  60 ///////////////////////////////////////////////////////////////
  61 // You can find other X11 specific stuff
  62 // at the end of this file...
  63 ///////////////////////////////////////////////////////////////
  64
  65 namespace {
  66
  67 int getDPI()
  68 {
  69         QWidget w;
  70         return int(0.5 * (w.logicalDpiX() + w.logicalDpiY()));
  71 }
  72
  73 } // namespace anon
  74
  75
  76 namespace lyx {
  77
  78 frontend::Application * createApplication(int & argc, char * argv[])
  79 {
  80         return new frontend::GuiApplication(argc, argv);
  81 }
  82
  83
  84 namespace frontend {
  85
  86 GuiApplication * guiApp;
  87
  88
  89 GuiApplication::~GuiApplication()
  90 {
  91         socket_callbacks_.clear();
  92 }
  93
  94
  95 GuiApplication::GuiApplication(int & argc, char ** argv)
  96         : QApplication(argc, argv), Application(argc, argv)
  97 {
  98         // Qt bug? setQuitOnLastWindowClosed(true); does not work
  99         setQuitOnLastWindowClosed(false);
 100
 101 #ifdef Q_WS_X11
 102         // doubleClickInterval() is 400 ms on X11 which is just too long.
 103         // On Windows and Mac OS X, the operating system's value is used.
 104         // On Microsoft Windows, calling this function sets the double
 105         // click interval for all applications. So we don't!
 106         QApplication::setDoubleClickInterval(300);
 107 #endif
 108
 109         // install translation file for Qt built-in dialogs
 110         QString language_name = QString("qt_") + QLocale::system().name();
 111         language_name.truncate(5);
 112         if (qt_trans_.load(language_name,
 113                 QLibraryInfo::location(QLibraryInfo::TranslationsPath)))
 114         {
 115                 qApp->installTranslator(&qt_trans_);
 116                 // even if the language calls for RtL, don't do that
 117                 qApp->setLayoutDirection(Qt::LeftToRight);
 118                 LYXERR(Debug::GUI)
 119                         << "Successfully installed Qt translations for locale "
 120                         << fromqstr(language_name) << std::endl;
 121         } else
 122                 LYXERR(Debug::GUI)
 123                         << "Could not find  Qt translations for locale "
 124                         << fromqstr(language_name) << std::endl;
 125
 126         using namespace lyx::graphics;
 127
 128         Image::newImage = boost::bind(&QLImage::newImage);
 129         Image::loadableFormats = boost::bind(&QLImage::loadableFormats);
 130
 131         // needs to be done before reading lyxrc
 132         lyxrc.dpi = getDPI();
 133
 134         LoaderQueue::setPriority(10,100);
 135
 136         guiApp = this;
 137 }
 138
 139 Clipboard& GuiApplication::clipboard()
 140 {
 141         return clipboard_;
 142 }
 143
 144
 145 Selection& GuiApplication::selection()
 146 {
 147         return selection_;
 148 }
 149
 150
 151 int const GuiApplication::exec()
 152 {
 153         QTimer::singleShot(1, this, SLOT(execBatchCommands()));
 154         return QApplication::exec();
 155 }
 156
 157
 158 void GuiApplication::exit(int status)
 159 {
 160         QApplication::exit(status);
 161 }
 162
 163
 164 void GuiApplication::execBatchCommands()
 165 {
 166         LyX::ref().execBatchCommands();
 167 }
 168
 169
 170 string const GuiApplication::romanFontName()
 171 {
 172         QFont font;
 173         font.setKerning(false);
 174         font.setStyleHint(QFont::Serif);
 175         font.setFamily("serif");
 176
 177         return fromqstr(QFontInfo(font).family());
 178 }
 179
 180
 181 string const GuiApplication::sansFontName()
 182 {
 183         QFont font;
 184         font.setKerning(false);
 185         font.setStyleHint(QFont::SansSerif);
 186         font.setFamily("sans");
 187
 188         return fromqstr(QFontInfo(font).family());
 189 }
 190
 191
 192 string const GuiApplication::typewriterFontName()
 193 {
 194         QFont font;
 195         font.setKerning(false);
 196         font.setStyleHint(QFont::TypeWriter);
 197         font.setFamily("monospace");
 198
 199         return fromqstr(QFontInfo(font).family());
 200 }
 201
 202
 203 bool GuiApplication::event(QEvent * e)
 204 {
 205         switch(e->type()) {
 206         case QEvent::FileOpen: {
 207                 // Open a file; this happens only on Mac OS X for now
 208                 QFileOpenEvent * foe = static_cast<QFileOpenEvent *>(e);
 209                 lyx::dispatch(FuncRequest(LFUN_FILE_OPEN,
 210                                           fromqstr(foe->file())));
 211                 return true;
 212         }
 213         default:
 214                 return QApplication::event(e);
 215         }
 216 }
 217
 218
 219 bool GuiApplication::notify(QObject * receiver, QEvent * event)
 220 {
 221         bool return_value;
 222         try {
 223                 return_value = QApplication::notify(receiver, event);
 224         }
 225         catch (std::exception  const & e) {
 226                 lyxerr << "Caught \"normal\" exception: " << e.what() << endl;
 227                 LyX::cref().emergencyCleanup();
 228                 abort();
 229         }
 230         catch (...) {
 231                 lyxerr << "Caught some really weird exception..." << endl;
 232                 LyX::cref().emergencyCleanup();
 233                 abort();
 234         }
 235
 236         return return_value;
 237 }
 238
 239
 240 void GuiApplication::syncEvents()
 241 {
 242         // This is the ONLY place where processEvents may be called.
 243         // During screen update/ redraw, this method is disabled to
 244         // prevent keyboard events being handed to the LyX core, where
 245         // they could cause re-entrant calls to screen update.
 246         processEvents(QEventLoop::ExcludeUserInputEvents);
 247 }
 248
 249
 250 bool GuiApplication::getRgbColor(LColor_color col,
 251         lyx::RGBColor & rgbcol)
 252 {
 253         QColor const & qcol = color_cache_.get(col);
 254         if (!qcol.isValid()) {
 255                 rgbcol.r = 0;
 256                 rgbcol.g = 0;
 257                 rgbcol.b = 0;
 258                 return false;
 259         }
 260         rgbcol.r = qcol.red();
 261         rgbcol.g = qcol.green();
 262         rgbcol.b = qcol.blue();
 263         return true;
 264 }
 265
 266
 267 string const GuiApplication::hexName(LColor_color col)
 268 {
 269         return lyx::support::ltrim(fromqstr(color_cache_.get(col).name()), "#");
 270 }
 271
 272
 273 void GuiApplication::updateColor(LColor_color)
 274 {
 275         // FIXME: Bleh, can't we just clear them all at once ?
 276         color_cache_.clear();
 277 }
 278
 279
 280 void GuiApplication::registerSocketCallback(int fd, boost::function<void()> func)
 281 {
 282         socket_callbacks_[fd] =
 283                 boost::shared_ptr<socket_callback>(new socket_callback(fd, func));
 284 }
 285
 286
 287 void GuiApplication::unregisterSocketCallback(int fd)
 288 {
 289         socket_callbacks_.erase(fd);
 290 }
 291
 292 ////////////////////////////////////////////////////////////////////////
 293 // X11 specific stuff goes here...
 294 #ifdef Q_WS_X11
 295 bool GuiApplication::x11EventFilter(XEvent * xev)
 296 {
 297         if (!currentView())
 298                 return false;
 299
 300         switch (xev->type) {
 301         case SelectionRequest: {
 302                 if (xev->xselectionrequest.selection != XA_PRIMARY)
 303                         break;
 304                 LYXERR(Debug::GUI) << "X requested selection." << endl;
 305                 BufferView * bv = currentView()->view();
 306                 if (bv) {
 307                         docstring const sel = bv->requestSelection();
 308                         if (!sel.empty())
 309                                 selection_.put(sel);
 310                 }
 311                 break;
 312         }
 313         case SelectionClear: {
 314                 if (xev->xselectionclear.selection != XA_PRIMARY)
 315                         break;
 316                 LYXERR(Debug::GUI) << "Lost selection." << endl;
 317                 BufferView * bv = currentView()->view();
 318                 if (bv)
 319                         bv->clearSelection();
 320                 break;
 321         }
 322         }
 323         return false;
 324 }
 325 #endif
 326
 327
 328 } // namespace frontend
 329 } // namespace lyx
 330
 331 #include "GuiApplication_moc.cpp"