src/frontends/qt2/QContentPane.C

   1 /**
   2  * \file QContentPane.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
  16 #include "QWorkArea.h"
  17 #include "QLyXKeySym.h"
  18 #include "funcrequest.h"
  19 #include "qt_helpers.h"
  20
  21 #include <qevent.h>
  22 #include <qpainter.h>
  23 #include <qtimer.h>
  24 #include <qapplication.h>
  25 #include <qcursor.h>
  26
  27 using std::endl;
  28
  29 namespace {
  30
  31 /// return the LyX key state from Qt's
  32 key_modifier::state q_key_state(Qt::ButtonState state)
  33 {
  34         key_modifier::state k = key_modifier::none;
  35         if (state & Qt::ControlButton)
  36                 k |= key_modifier::ctrl;
  37         if (state & Qt::ShiftButton)
  38                 k |= key_modifier::shift;
  39         if (state & Qt::AltButton)
  40                 k |= key_modifier::alt;
  41         return k;
  42 }
  43
  44
  45 /// return the LyX mouse button state from Qt's
  46 mouse_button::state q_button_state(Qt::ButtonState button)
  47 {
  48         mouse_button::state b = mouse_button::none;
  49         switch (button) {
  50                 case Qt::LeftButton:
  51                         b = mouse_button::button1;
  52                         break;
  53                 case Qt::MidButton:
  54                         b = mouse_button::button2;
  55                         break;
  56                 case Qt::RightButton:
  57                         b = mouse_button::button3;
  58                         break;
  59                 default:
  60                         break;
  61         }
  62         return b;
  63 }
  64
  65
  66 /// return the LyX mouse button state from Qt's
  67 mouse_button::state q_motion_state(Qt::ButtonState state)
  68 {
  69         mouse_button::state b = mouse_button::none;
  70         if (state & Qt::LeftButton)
  71                 b |= mouse_button::button1;
  72         if (state & Qt::MidButton)
  73                 b |= mouse_button::button2;
  74         if (state & Qt::RightButton)
  75                 b |= mouse_button::button3;
  76         return b;
  77 }
  78
  79 } // namespace anon
  80
  81
  82 QContentPane::QContentPane(QWorkArea * parent)
  83         : QWidget(parent, "content_pane", WRepaintNoErase),
  84         wa_(parent)
  85 {
  86         setFocusPolicy(QWidget::WheelFocus);
  87         setFocus();
  88         setCursor(ibeamCursor);
  89
  90         // stupid moc strikes again
  91         connect(wa_->scrollbar_, SIGNAL(valueChanged(int)),
  92                 this, SLOT(scrollBarChanged(int)));
  93
  94 }
  95
  96
  97 void QContentPane::scrollBarChanged(int val)
  98 {
  99         wa_->scrollDocView(val);
 100 }
 101
 102
 103 void QContentPane::mousePressEvent(QMouseEvent * e)
 104 {
 105         if (dc_event_.active && dc_event_ == *e) {
 106                 dc_event_.active = false;
 107                 FuncRequest cmd(LFUN_MOUSE_TRIPLE,
 108                         dc_event_.x, dc_event_.y,
 109                         q_button_state(dc_event_.state));
 110                 wa_->dispatch(cmd);
 111                 return;
 112         }
 113
 114         FuncRequest cmd(LFUN_MOUSE_PRESS, e->x(), e->y(),
 115                         q_button_state(e->button()));
 116         wa_->dispatch(cmd);
 117 }
 118
 119
 120 void QContentPane::mouseReleaseEvent(QMouseEvent * e)
 121 {
 122         FuncRequest cmd(LFUN_MOUSE_RELEASE, e->x(), e->y(),
 123                         q_button_state(e->button()));
 124         wa_->dispatch(cmd);
 125 }
 126
 127
 128 void QContentPane::mouseMoveEvent(QMouseEvent * e)
 129 {
 130         FuncRequest cmd
 131                 (LFUN_MOUSE_MOTION, e->x(), e->y(), q_motion_state(e->state()));
 132         wa_->dispatch(cmd);
 133 }
 134
 135
 136 void QContentPane::wheelEvent(QWheelEvent * e)
 137 {
 138         wa_->scrollbar_->setValue(wa_->scrollbar_->value() - e->delta());
 139 }
 140
 141
 142 void QContentPane::keyPressEvent(QKeyEvent * e)
 143 {
 144         QLyXKeySym * sym = new QLyXKeySym();
 145         sym->set(e);
 146         wa_->workAreaKeyPress(LyXKeySymPtr(sym), q_key_state(e->state()));
 147 }
 148
 149
 150 void QContentPane::doubleClickTimeout()
 151 {
 152         if (!dc_event_.active)
 153                 return;
 154
 155         dc_event_.active = false;
 156
 157         FuncRequest cmd(LFUN_MOUSE_DOUBLE,
 158                 dc_event_.x, dc_event_.y,
 159                 q_button_state(dc_event_.state));
 160         wa_->dispatch(cmd);
 161 }
 162
 163
 164 void QContentPane::mouseDoubleClickEvent(QMouseEvent * e)
 165 {
 166         dc_event_ = double_click(e);
 167
 168         // doubleClickInterval() is just too long.
 169         QTimer::singleShot(int(QApplication::doubleClickInterval() / 1.5),
 170                 this, SLOT(doubleClickTimeout()));
 171 }
 172
 173
 174 void QContentPane::resizeEvent(QResizeEvent *)
 175 {
 176         if (!pixmap_.get()) {
 177                 pixmap_.reset(new QPixmap(width(), height()));
 178         }
 179
 180         pixmap_->resize(width(), height());
 181         wa_->workAreaResize();
 182 }
 183
 184
 185 void QContentPane::paintEvent(QPaintEvent * e)
 186 {
 187         if (!pixmap_.get()) {
 188                 pixmap_.reset(new QPixmap(width(), height()));
 189                 wa_->workAreaResize();
 190                 return;
 191         }
 192
 193         QRect r(e->rect());
 194
 195         QPainter q(this);
 196         q.drawPixmap(QPoint(r.x(), r.y()),
 197                 *pixmap_.get(), r);
 198 }