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 #ifdef __GNUG__
  14 #pragma implementation
  15 #endif
  16
  17 #include "debug.h"
  18 #include "LyXView.h"
  19 #include "version.h" // lyx_version
  20
  21 #include "support/filetools.h" // LibFileSearch
  22 #include "support/lstrings.h"
  23 #include "support/LAssert.h"
  24
  25 #include "QWorkArea.h"
  26
  27 #include <qapplication.h>
  28 #include <qevent.h>
  29 #include <qpainter.h>
  30 #include <qmainwindow.h>
  31 #include <qlayout.h>
  32 #include <qclipboard.h>
  33
  34 #ifdef Q_WS_X11
  35 #include <X11/Xlib.h>
  36 #endif
  37
  38 #include <cmath>
  39 #include <cctype>
  40
  41 using std::endl;
  42 using std::abs;
  43 using std::hex;
  44
  45
  46 QWorkArea::QWorkArea(int, int, int, int)
  47         : WorkArea(), QWidget(qApp->mainWidget()), painter_(*this)
  48 {
  49         scrollbar_ = new QScrollBar(QScrollBar::Vertical, this);
  50         content_ = new QContentPane(this);
  51
  52         (static_cast<QMainWindow*>(qApp->mainWidget()))->setCentralWidget(this);
  53
  54         setFocusProxy(content_);
  55
  56         content_->show();
  57
  58         content_->setBackgroundColor(lcolor.getX11Name(LColor::background).c_str());
  59
  60         QHBoxLayout * vl = new QHBoxLayout(this);
  61         vl->addWidget(content_, 5);
  62         vl->addWidget(scrollbar_, 0);
  63
  64         show();
  65 }
  66
  67
  68 QWorkArea::~QWorkArea()
  69 {
  70 }
  71
  72
  73 void QWorkArea::setScrollbarParams(int h, int pos, int line_h)
  74 {
  75         // do what cursor movement does (some grey)
  76         h += height() / 4;
  77
  78         int max = std::max(0, h - height());
  79
  80         scrollbar_->setRange(0, max);
  81         scrollbar_->setValue(pos);
  82         scrollbar_->setLineStep(line_h);
  83         scrollbar_->setPageStep(height());
  84 }
  85
  86 namespace {
  87 QWorkArea const * wa_ptr = 0;
  88 }
  89
  90 #ifdef Q_WS_X11
  91 bool lyxX11EventFilter(XEvent * xev)
  92 {
  93         switch (xev->type) {
  94         case SelectionRequest:
  95                 lyxerr[Debug::GUI] << "X requested selection." << endl;
  96                 if (wa_ptr)
  97                         wa_ptr->selectionRequested();
  98                 break;
  99         case SelectionClear:
 100                 lyxerr[Debug::GUI] << "Lost selection." << endl;
 101                 if (wa_ptr)
 102                         wa_ptr->selectionLost();
 103                 break;
 104         }
 105         return false;
 106 }
 107 #endif
 108
 109 void QWorkArea::haveSelection(bool own) const
 110 {
 111         wa_ptr = this;
 112
 113 #if QT_VERSION >= 300
 114         if (!QApplication::clipboard()->supportsSelection())
 115                 return;
 116
 117         if (own) {
 118                 QApplication::clipboard()->setSelectionMode(true);
 119                 QApplication::clipboard()->setText(QString());
 120         }
 121         // We don't need to do anything if own = false, as this case is
 122         // handled by QT.
 123 #endif
 124 }
 125
 126
 127 string const QWorkArea::getClipboard() const
 128 {
 129 #if QT_VERSION >= 300
 130         QApplication::clipboard()->setSelectionMode(true);
 131 #endif
 132         QString str = QApplication::clipboard()->text();
 133         if (str.isNull())
 134                 return string();
 135         return str.latin1();
 136 }
 137
 138
 139 void QWorkArea::putClipboard(string const & str) const
 140 {
 141 #if QT_VERSION >= 300
 142         QApplication::clipboard()->setSelectionMode(true);
 143 #endif
 144         QApplication::clipboard()->setText(str.c_str());
 145 }