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 #include "QWorkArea.h"
  14 #include "debug.h"
  15 #include "LColor.h"
  16 #include "qt_helpers.h"
  17 #include "lcolorcache.h"
  18 #include "funcrequest.h"
  19
  20 #include <qapplication.h>
  21 #include <qdragobject.h>
  22 #include <qpainter.h>
  23 #include <qmainwindow.h>
  24 #include <qlayout.h>
  25 #include <qclipboard.h>
  26
  27 #ifdef Q_WS_X11
  28 #include <X11/Xlib.h>
  29 #endif
  30
  31 using std::endl;
  32
  33
  34 QWorkArea::QWorkArea(int, int, int, int)
  35         : WorkArea(), QWidget(qApp->mainWidget()), painter_(*this)
  36 {
  37         scrollbar_ = new QScrollBar(QScrollBar::Vertical, this);
  38         content_ = new QContentPane(this);
  39
  40         (static_cast<QMainWindow*>(qApp->mainWidget()))->setCentralWidget(this);
  41
  42         setFocusProxy(content_);
  43         setAcceptDrops(true);
  44
  45         content_->show();
  46
  47         content_->setBackgroundColor(lcolorcache.get(LColor::background));
  48
  49         QHBoxLayout * vl = new QHBoxLayout(this);
  50         vl->addWidget(content_, 5);
  51         vl->addWidget(scrollbar_, 0);
  52
  53         show();
  54 }
  55
  56
  57 QWorkArea::~QWorkArea()
  58 {
  59 }
  60
  61
  62 void QWorkArea::setScrollbarParams(int h, int pos, int line_h)
  63 {
  64         // do what cursor movement does (some grey)
  65         h += height() / 4;
  66
  67         int max = std::max(0, h - height());
  68
  69         scrollbar_->setRange(0, max);
  70         scrollbar_->setValue(pos);
  71         scrollbar_->setLineStep(line_h);
  72         scrollbar_->setPageStep(height());
  73 }
  74
  75 namespace {
  76 QWorkArea const * wa_ptr = 0;
  77 }
  78
  79 #ifdef Q_WS_X11
  80 bool lyxX11EventFilter(XEvent * xev)
  81 {
  82         switch (xev->type) {
  83         case SelectionRequest:
  84                 lyxerr[Debug::GUI] << "X requested selection." << endl;
  85                 if (wa_ptr)
  86                         wa_ptr->selectionRequested();
  87                 break;
  88         case SelectionClear:
  89                 lyxerr[Debug::GUI] << "Lost selection." << endl;
  90                 if (wa_ptr)
  91                         wa_ptr->selectionLost();
  92                 break;
  93         }
  94         return false;
  95 }
  96 #endif
  97
  98 void QWorkArea::haveSelection(bool own) const
  99 {
 100         wa_ptr = this;
 101
 102 #if QT_VERSION >= 300
 103         if (!QApplication::clipboard()->supportsSelection())
 104                 return;
 105
 106         if (own) {
 107                 QApplication::clipboard()->setSelectionMode(true);
 108                 QApplication::clipboard()->setText(QString());
 109         }
 110         // We don't need to do anything if own = false, as this case is
 111         // handled by QT.
 112 #endif
 113 }
 114
 115
 116 string const QWorkArea::getClipboard() const
 117 {
 118 #if QT_VERSION >= 300
 119         QApplication::clipboard()->setSelectionMode(true);
 120 #endif
 121         QString str = QApplication::clipboard()->text();
 122         if (str.isNull())
 123                 return string();
 124         return fromqstr(str);
 125 }
 126
 127
 128 void QWorkArea::putClipboard(string const & str) const
 129 {
 130 #if QT_VERSION >= 300
 131         QApplication::clipboard()->setSelectionMode(true);
 132 #endif
 133         QApplication::clipboard()->setText(toqstr(str));
 134 }
 135
 136
 137 void QWorkArea::dragEnterEvent(QDragEnterEvent * event)
 138 {
 139         event->accept(QUriDrag::canDecode(event));
 140 }
 141
 142
 143 void QWorkArea::dropEvent(QDropEvent* event)
 144 {
 145         QStringList files;
 146
 147         if (QUriDrag::decodeLocalFiles(event, files)) {
 148                 lyxerr[Debug::GUI] << "QWorkArea::dropEvent: got URIs!"
 149                                    << endl;
 150                 for (QStringList::Iterator i = files.begin();
 151                      i!=files.end(); ++i)
 152                         dispatch(FuncRequest(LFUN_FILE_OPEN, fromqstr(*i)));
 153         }
 154 }