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 #include "qt_helpers.h"
  27
  28 #include <qapplication.h>
  29 #include <qevent.h>
  30 #include <qpainter.h>
  31 #include <qmainwindow.h>
  32 #include <qlayout.h>
  33 #include <qclipboard.h>
  34
  35 #ifdef Q_WS_X11
  36 #include <X11/Xlib.h>
  37 #endif
  38
  39 #include <cmath>
  40 #include <cctype>
  41
  42 using std::endl;
  43 using std::abs;
  44 using std::hex;
  45
  46
  47 QWorkArea::QWorkArea(int, int, int, int)
  48         : WorkArea(), QWidget(qApp->mainWidget()), painter_(*this)
  49 {
  50         scrollbar_ = new QScrollBar(QScrollBar::Vertical, this);
  51         content_ = new QContentPane(this);
  52
  53         (static_cast<QMainWindow*>(qApp->mainWidget()))->setCentralWidget(this);
  54
  55         setFocusProxy(content_);
  56
  57         content_->show();
  58
  59         content_->setBackgroundColor(toqstr(lcolor.getX11Name(LColor::background)));
  60
  61         QHBoxLayout * vl = new QHBoxLayout(this);
  62         vl->addWidget(content_, 5);
  63         vl->addWidget(scrollbar_, 0);
  64
  65         show();
  66 }
  67
  68
  69 QWorkArea::~QWorkArea()
  70 {
  71 }
  72
  73
  74 void QWorkArea::setScrollbarParams(int h, int pos, int line_h)
  75 {
  76         // do what cursor movement does (some grey)
  77         h += height() / 4;
  78
  79         int max = std::max(0, h - height());
  80
  81         scrollbar_->setRange(0, max);
  82         scrollbar_->setValue(pos);
  83         scrollbar_->setLineStep(line_h);
  84         scrollbar_->setPageStep(height());
  85 }
  86
  87 namespace {
  88 QWorkArea const * wa_ptr = 0;
  89 }
  90
  91 #ifdef Q_WS_X11
  92 bool lyxX11EventFilter(XEvent * xev)
  93 {
  94         switch (xev->type) {
  95         case SelectionRequest:
  96                 lyxerr[Debug::GUI] << "X requested selection." << endl;
  97                 if (wa_ptr)
  98                         wa_ptr->selectionRequested();
  99                 break;
 100         case SelectionClear:
 101                 lyxerr[Debug::GUI] << "Lost selection." << endl;
 102                 if (wa_ptr)
 103                         wa_ptr->selectionLost();
 104                 break;
 105         }
 106         return false;
 107 }
 108 #endif
 109
 110 void QWorkArea::haveSelection(bool own) const
 111 {
 112         wa_ptr = this;
 113
 114 #if QT_VERSION >= 300
 115         if (!QApplication::clipboard()->supportsSelection())
 116                 return;
 117
 118         if (own) {
 119                 QApplication::clipboard()->setSelectionMode(true);
 120                 QApplication::clipboard()->setText(QString());
 121         }
 122         // We don't need to do anything if own = false, as this case is
 123         // handled by QT.
 124 #endif
 125 }
 126
 127
 128 string const QWorkArea::getClipboard() const
 129 {
 130 #if QT_VERSION >= 300
 131         QApplication::clipboard()->setSelectionMode(true);
 132 #endif
 133         QString str = QApplication::clipboard()->text();
 134         if (str.isNull())
 135                 return string();
 136         return fromqstr(str);
 137 }
 138
 139
 140 void QWorkArea::putClipboard(string const & str) const
 141 {
 142 #if QT_VERSION >= 300
 143         QApplication::clipboard()->setSelectionMode(true);
 144 #endif
 145         QApplication::clipboard()->setText(toqstr(str));
 146 }