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
  25 #include <qapplication.h>
  26 #include <qevent.h>
  27 #include <qpainter.h>
  28 #include <qmainwindow.h>
  29 #include <qlayout.h>
  30 #include <qclipboard.h>
  31
  32 #ifdef Q_WS_X11
  33 #include <X11/Xlib.h>
  34 #endif
  35
  36 #include <cmath>
  37 #include <cctype>
  38
  39 using std::endl;
  40 using std::abs;
  41 using std::hex;
  42
  43
  44 QWorkArea::QWorkArea(int, int, int, int)
  45         : WorkArea(), QWidget(qApp->mainWidget()), painter_(*this)
  46 {
  47         scrollbar_ = new QScrollBar(QScrollBar::Vertical, this);
  48         content_ = new QContentPane(this);
  49
  50         (static_cast<QMainWindow*>(qApp->mainWidget()))->setCentralWidget(this);
  51
  52         setFocusProxy(content_);
  53
  54         content_->show();
  55
  56         content_->setBackgroundColor(toqstr(lcolor.getX11Name(LColor::background)));
  57
  58         QHBoxLayout * vl = new QHBoxLayout(this);
  59         vl->addWidget(content_, 5);
  60         vl->addWidget(scrollbar_, 0);
  61
  62         show();
  63 }
  64
  65
  66 QWorkArea::~QWorkArea()
  67 {
  68 }
  69
  70
  71 void QWorkArea::setScrollbarParams(int h, int pos, int line_h)
  72 {
  73         // do what cursor movement does (some grey)
  74         h += height() / 4;
  75
  76         int max = std::max(0, h - height());
  77
  78         scrollbar_->setRange(0, max);
  79         scrollbar_->setValue(pos);
  80         scrollbar_->setLineStep(line_h);
  81         scrollbar_->setPageStep(height());
  82 }
  83
  84 namespace {
  85 QWorkArea const * wa_ptr = 0;
  86 }
  87
  88 #ifdef Q_WS_X11
  89 bool lyxX11EventFilter(XEvent * xev)
  90 {
  91         switch (xev->type) {
  92         case SelectionRequest:
  93                 lyxerr[Debug::GUI] << "X requested selection." << endl;
  94                 if (wa_ptr)
  95                         wa_ptr->selectionRequested();
  96                 break;
  97         case SelectionClear:
  98                 lyxerr[Debug::GUI] << "Lost selection." << endl;
  99                 if (wa_ptr)
 100                         wa_ptr->selectionLost();
 101                 break;
 102         }
 103         return false;
 104 }
 105 #endif
 106
 107 void QWorkArea::haveSelection(bool own) const
 108 {
 109         wa_ptr = this;
 110
 111 #if QT_VERSION >= 300
 112         if (!QApplication::clipboard()->supportsSelection())
 113                 return;
 114
 115         if (own) {
 116                 QApplication::clipboard()->setSelectionMode(true);
 117                 QApplication::clipboard()->setText(QString());
 118         }
 119         // We don't need to do anything if own = false, as this case is
 120         // handled by QT.
 121 #endif
 122 }
 123
 124
 125 string const QWorkArea::getClipboard() const
 126 {
 127 #if QT_VERSION >= 300
 128         QApplication::clipboard()->setSelectionMode(true);
 129 #endif
 130         QString str = QApplication::clipboard()->text();
 131         if (str.isNull())
 132                 return string();
 133         return fromqstr(str);
 134 }
 135
 136
 137 void QWorkArea::putClipboard(string const & str) const
 138 {
 139 #if QT_VERSION >= 300
 140         QApplication::clipboard()->setSelectionMode(true);
 141 #endif
 142         QApplication::clipboard()->setText(toqstr(str));
 143 }