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