src/frontends/qt2/QWorkArea.C

   1 /**
   2  * \file QWorkArea.C
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author John Levon
   7  *
   8  * Full author contact details are available in file CREDITS
   9  */
  10
  11 #include <config.h>
  12
  13
  14 #include "debug.h"
  15 #include "LyXView.h"
  16 #include "version.h" // lyx_version
  17
  18 #include "support/filetools.h" // LibFileSearch
  19 #include "support/lstrings.h"
  20 #include "support/LAssert.h"
  21
  22 #include "QWorkArea.h"
  23 #include "qt_helpers.h"
  24 #include "lcolorcache.h"
  25
  26 #include <qapplication.h>
  27 #include <qevent.h>
  28 #include <qpainter.h>
  29 #include <qmainwindow.h>
  30 #include <qlayout.h>
  31 #include <qclipboard.h>
  32
  33 #ifdef Q_WS_X11
  34 #include <X11/Xlib.h>
  35 #endif
  36
  37 #include <cmath>
  38 #include <cctype>
  39
  40 using std::endl;
  41 using std::abs;
  42 using std::hex;
  43
  44
  45 QWorkArea::QWorkArea(int, int, int, int)
  46         : WorkArea(), QWidget(qApp->mainWidget()), painter_(*this)
  47 {
  48         scrollbar_ = new QScrollBar(QScrollBar::Vertical, this);
  49         content_ = new QContentPane(this);
  50
  51         (static_cast<QMainWindow*>(qApp->mainWidget()))->setCentralWidget(this);
  52
  53         setFocusProxy(content_);
  54
  55         content_->show();
  56
  57         content_->setBackgroundColor(lcolorcache.get(LColor::background));
  58
  59         QHBoxLayout * vl = new QHBoxLayout(this);
  60         vl->addWidget(content_, 5);
  61         vl->addWidget(scrollbar_, 0);
  62
  63         show();
  64 }
  65
  66
  67 QWorkArea::~QWorkArea()
  68 {
  69 }
  70
  71
  72 void QWorkArea::setScrollbarParams(int h, int pos, int line_h)
  73 {
  74         // do what cursor movement does (some grey)
  75         h += height() / 4;
  76
  77         int max = std::max(0, h - height());
  78
  79         scrollbar_->setRange(0, max);
  80         scrollbar_->setValue(pos);
  81         scrollbar_->setLineStep(line_h);
  82         scrollbar_->setPageStep(height());
  83 }
  84
  85 namespace {
  86 QWorkArea const * wa_ptr = 0;
  87 }
  88
  89 #ifdef Q_WS_X11
  90 bool lyxX11EventFilter(XEvent * xev)
  91 {
  92         switch (xev->type) {
  93         case SelectionRequest:
  94                 lyxerr[Debug::GUI] << "X requested selection." << endl;
  95                 if (wa_ptr)
  96                         wa_ptr->selectionRequested();
  97                 break;
  98         case SelectionClear:
  99                 lyxerr[Debug::GUI] << "Lost selection." << endl;
 100                 if (wa_ptr)
 101                         wa_ptr->selectionLost();
 102                 break;
 103         }
 104         return false;
 105 }
 106 #endif
 107
 108 void QWorkArea::haveSelection(bool own) const
 109 {
 110         wa_ptr = this;
 111
 112 #if QT_VERSION >= 300
 113         if (!QApplication::clipboard()->supportsSelection())
 114                 return;
 115
 116         if (own) {
 117                 QApplication::clipboard()->setSelectionMode(true);
 118                 QApplication::clipboard()->setText(QString());
 119         }
 120         // We don't need to do anything if own = false, as this case is
 121         // handled by QT.
 122 #endif
 123 }
 124
 125
 126 string const QWorkArea::getClipboard() const
 127 {
 128 #if QT_VERSION >= 300
 129         QApplication::clipboard()->setSelectionMode(true);
 130 #endif
 131         QString str = QApplication::clipboard()->text();
 132         if (str.isNull())
 133                 return string();
 134         return fromqstr(str);
 135 }
 136
 137
 138 void QWorkArea::putClipboard(string const & str) const
 139 {
 140 #if QT_VERSION >= 300
 141         QApplication::clipboard()->setSelectionMode(true);
 142 #endif
 143         QApplication::clipboard()->setText(toqstr(str));
 144 }