2 * \file GuiWorkArea.cpp
3 * This file is part of LyX, the document processor.
4 * Licence details can be found in the file COPYING.
7 * \author Abdelrazak Younes
9 * Full author contact details are available in file CREDITS.
14 #include "GuiWorkArea.h"
16 #include "ColorCache.h"
17 #include "FontLoader.h"
21 #include "BufferList.h"
22 #include "BufferParams.h"
23 #include "BufferView.h"
24 #include "CoordCache.h"
27 #include "FuncRequest.h"
28 #include "GuiApplication.h"
29 #include "GuiCompleter.h"
30 #include "GuiKeySymbol.h"
31 #include "GuiPainter.h"
33 #include "KeySymbol.h"
38 #include "MetricsInfo.h"
39 #include "qt_helpers.h"
43 #include "graphics/GraphicsImage.h"
44 #include "graphics/GraphicsLoader.h"
46 #include "support/convert.h"
47 #include "support/debug.h"
48 #include "support/gettext.h"
49 #include "support/FileName.h"
51 #include "frontends/Application.h"
52 #include "frontends/FontMetrics.h"
53 #include "frontends/WorkAreaManager.h"
55 #include <QContextMenuEvent>
56 #include <QInputContext>
61 #include <QMainWindow>
65 #include <QPixmapCache>
68 #include <QToolButton>
72 #include <boost/bind.hpp>
78 extern "C" int XEventsQueued(Display *display, int mode);
82 int const CursorWidth = 2;
84 int const CursorWidth = 1;
86 int const TabIndicatorWidth = 3;
92 using namespace lyx::support;
97 /// return the LyX mouse button state from Qt's
98 static mouse_button::state q_button_state(Qt::MouseButton button)
100 mouse_button::state b = mouse_button::none;
103 b = mouse_button::button1;
106 b = mouse_button::button2;
108 case Qt::RightButton:
109 b = mouse_button::button3;
118 /// return the LyX mouse button state from Qt's
119 mouse_button::state q_motion_state(Qt::MouseButtons state)
121 mouse_button::state b = mouse_button::none;
122 if (state & Qt::LeftButton)
123 b |= mouse_button::button1;
124 if (state & Qt::MidButton)
125 b |= mouse_button::button2;
126 if (state & Qt::RightButton)
127 b |= mouse_button::button3;
138 void draw(QPainter & painter)
140 if (!show_ || !rect_.isValid())
144 int l = x_ - rect_.left();
145 int r = rect_.right() - x_;
146 int bot = rect_.bottom();
148 // draw vertica linel
149 painter.fillRect(x_, y, CursorWidth, rect_.height(), color_);
151 // draw RTL/LTR indication
152 painter.setPen(color_);
155 painter.drawLine(x_, bot, x_ - l, bot);
157 painter.drawLine(x_, bot, x_ + CursorWidth + r, bot);
160 // draw completion triangle
162 int m = y + rect_.height() / 2;
163 int d = TabIndicatorWidth - 1;
165 painter.drawLine(x_ - 1, m - d, x_ - 1 - d, m);
166 painter.drawLine(x_ - 1, m + d, x_ - 1 - d, m);
168 painter.drawLine(x_ + CursorWidth, m - d, x_ + CursorWidth + d, m);
169 painter.drawLine(x_ + CursorWidth, m + d, x_ + CursorWidth + d, m);
174 void update(int x, int y, int h, bool l_shape,
175 bool rtl, bool completable)
177 color_ = guiApp->colorCache().get(Color_cursor);
180 completable_ = completable;
183 // extension to left and right
187 // RTL/LTR indication
195 // completion triangle
198 l = max(l, TabIndicatorWidth);
200 r = max(r, TabIndicatorWidth);
203 // compute overall rectangle
204 rect_ = QRect(x - l, y, CursorWidth + r + l, h);
207 void show(bool set_show = true) { show_ = set_show; }
208 void hide() { show_ = false; }
210 QRect const & rect() { return rect_; }
213 /// cursor is in RTL or LTR text
215 /// indication for RTL or LTR
217 /// triangle to show that a completion is available
223 /// rectangle, possibly with l_shape and completion triangle
225 /// x position (were the vertical line is drawn)
230 // This is a 'heartbeat' generating synthetic mouse move events when the
231 // cursor is at the top or bottom edge of the viewport. One scroll per 0.2 s
232 SyntheticMouseEvent::SyntheticMouseEvent()
233 : timeout(200), restart_timeout(true),
234 x_old(-1), y_old(-1), min_scrollbar_old(-1), max_scrollbar_old(-1)
238 GuiWorkArea::GuiWorkArea(QWidget *)
239 : buffer_view_(0), lyx_view_(0),
240 cursor_visible_(false),
241 need_resize_(false), schedule_redraw_(false),
242 preedit_lines_(1), completer_(new GuiCompleter(this, this)),
243 context_target_pos_()
248 GuiWorkArea::GuiWorkArea(Buffer & buffer, GuiView & gv)
249 : buffer_view_(0), lyx_view_(0),
250 cursor_visible_(false),
251 need_resize_(false), schedule_redraw_(false),
252 preedit_lines_(1), completer_(new GuiCompleter(this, this)),
253 context_target_pos_()
261 void GuiWorkArea::init()
264 connect(&cursor_timeout_, SIGNAL(timeout()),
265 this, SLOT(toggleCursor()));
267 int const time = QApplication::cursorFlashTime() / 2;
269 cursor_timeout_.setInterval(time);
270 cursor_timeout_.start();
272 // let's initialize this just to be safe
273 cursor_timeout_.setInterval(500);
276 screen_ = QPixmap(viewport()->width(), viewport()->height());
277 // With Qt4.5 a mouse event will happen before the first paint event
278 // so make sure that the buffer view has an up to date metrics.
279 buffer_view_->resize(viewport()->width(), viewport()->height());
280 cursor_ = new frontend::CursorWidget();
283 setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
284 setAcceptDrops(true);
285 setMouseTracking(true);
286 setMinimumSize(100, 70);
287 setFrameStyle(QFrame::NoFrame);
290 viewport()->setAutoFillBackground(false);
291 // We don't need double-buffering nor SystemBackground on
292 // the viewport because we have our own backing pixmap.
293 viewport()->setAttribute(Qt::WA_NoSystemBackground);
295 setFocusPolicy(Qt::StrongFocus);
297 viewport()->setCursor(Qt::IBeamCursor);
299 synthetic_mouse_event_.timeout.timeout.connect(
300 boost::bind(&GuiWorkArea::generateSyntheticMouseEvent,
303 // Initialize the vertical Scroll Bar
304 QObject::connect(verticalScrollBar(), SIGNAL(valueChanged(int)),
305 this, SLOT(scrollTo(int)));
307 LYXERR(Debug::GUI, "viewport width: " << viewport()->width()
308 << " viewport height: " << viewport()->height());
310 // Enables input methods for asian languages.
311 // Must be set when creating custom text editing widgets.
312 setAttribute(Qt::WA_InputMethodEnabled, true);
314 dialog_mode_ = false;
318 GuiWorkArea::~GuiWorkArea()
320 buffer_view_->buffer().workAreaManager().remove(this);
323 // Completer has a QObject parent and is thus automatically destroyed.
325 // delete completer_;
329 void GuiWorkArea::setGuiView(GuiView & gv)
335 void GuiWorkArea::setBuffer(Buffer & buffer)
338 buffer_view_ = new BufferView(buffer);
339 buffer.workAreaManager().add(this);
341 // HACK: Prevents an additional redraw when the scrollbar pops up
342 // which regularily happens on documents with more than one page.
343 // The policy should be set to "Qt::ScrollBarAsNeeded" soon.
344 // Since we have no geometry information yet, we assume that
345 // a document needs a scrollbar if there is more then four
346 // paragraph in the outermost text.
347 if (buffer.text().paragraphs().size() > 4)
348 setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
349 QTimer::singleShot(50, this, SLOT(fixVerticalScrollBar()));
353 void GuiWorkArea::fixVerticalScrollBar()
356 setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
360 void GuiWorkArea::close()
362 lyx_view_->removeWorkArea(this);
366 void GuiWorkArea::setFullScreen(bool full_screen)
368 buffer_view_->setFullScreen(full_screen);
369 setFrameStyle(QFrame::NoFrame);
371 setFrameStyle(QFrame::NoFrame);
372 if (lyxrc.full_screen_scrollbar)
373 setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
375 setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
379 BufferView & GuiWorkArea::bufferView()
381 return *buffer_view_;
385 BufferView const & GuiWorkArea::bufferView() const
387 return *buffer_view_;
391 void GuiWorkArea::stopBlinkingCursor()
393 cursor_timeout_.stop();
398 void GuiWorkArea::startBlinkingCursor()
401 //we're not supposed to cache this value.
402 int const time = QApplication::cursorFlashTime() / 2;
405 cursor_timeout_.setInterval(time);
406 cursor_timeout_.start();
410 void GuiWorkArea::redraw(bool update_metrics)
413 // No need to redraw in this case.
416 // No need to do anything if this is the current view. The BufferView
417 // metrics are already up to date.
418 if (update_metrics || lyx_view_ != guiApp->currentView()
419 || lyx_view_->currentWorkArea() != this) {
420 // FIXME: it would be nice to optimize for the off-screen case.
421 buffer_view_->updateMetrics();
422 buffer_view_->cursor().fixIfBroken();
425 // update cursor position, because otherwise it has to wait until
426 // the blinking interval is over
427 if (cursor_visible_) {
432 LYXERR(Debug::WORKAREA, "WorkArea::redraw screen");
434 update(0, 0, viewport()->width(), viewport()->height());
436 /// \warning: scrollbar updating *must* be done after the BufferView is drawn
437 /// because \c BufferView::updateScrollbar() is called in \c BufferView::draw().
439 lyx_view_->updateStatusBar();
441 if (lyxerr.debugging(Debug::WORKAREA))
442 buffer_view_->coordCache().dump();
446 void GuiWorkArea::processKeySym(KeySymbol const & key, KeyModifier mod)
448 if (lyx_view_->isFullScreen() && lyx_view_->menuBar()->isVisible()
449 && lyxrc.full_screen_menubar) {
450 // FIXME HACK: we should not have to do this here. See related comment
451 // in GuiView::event() (QEvent::ShortcutOverride)
452 lyx_view_->menuBar()->hide();
455 // In order to avoid bad surprise in the middle of an operation,
456 // we better stop the blinking cursor...
457 // the cursor gets restarted in GuiView::restartCursor()
458 stopBlinkingCursor();
459 guiApp->processKeySym(key, mod);
463 void GuiWorkArea::dispatch(FuncRequest const & cmd0, KeyModifier mod)
466 if (cmd0.action == LFUN_FILE_OPEN) {
467 lyx_view_->dispatch(cmd0);
473 if (cmd0.action == LFUN_MOUSE_PRESS) {
474 if (mod == ShiftModifier)
475 cmd = FuncRequest(cmd0, "region-select");
476 else if (mod == ControlModifier)
477 cmd = FuncRequest(cmd0, "paragraph-select");
484 bool const notJustMovingTheMouse =
485 cmd.action != LFUN_MOUSE_MOTION || cmd.button() != mouse_button::none;
487 // In order to avoid bad surprise in the middle of an operation, we better stop
488 // the blinking cursor.
489 if (notJustMovingTheMouse)
490 stopBlinkingCursor();
492 buffer_view_->mouseEventDispatch(cmd);
494 // Skip these when selecting
495 if (cmd.action != LFUN_MOUSE_MOTION) {
496 completer_->updateVisibility(false, false);
497 lyx_view_->updateDialogs();
498 lyx_view_->updateStatusBar();
501 // GUI tweaks except with mouse motion with no button pressed.
502 if (notJustMovingTheMouse) {
503 // Slight hack: this is only called currently when we
504 // clicked somewhere, so we force through the display
505 // of the new status here.
506 lyx_view_->clearMessage();
508 // Show the cursor immediately after any operation
509 startBlinkingCursor();
514 void GuiWorkArea::resizeBufferView()
516 // WARNING: Please don't put any code that will trigger a repaint here!
517 // We are already inside a paint event.
518 lyx_view_->setBusy(true);
521 buffer_view_->cursorPosAndHeight(p, h);
522 bool const cursor_in_view = buffer_view_->cursorInView(p, h);
523 buffer_view_->resize(viewport()->width(), viewport()->height());
525 buffer_view_->scrollToCursor();
528 // Update scrollbars which might have changed due different
529 // BufferView dimension. This is especially important when the
530 // BufferView goes from zero-size to the real-size for the first time,
531 // as the scrollbar paramters are then set for the first time.
534 lyx_view_->updateLayoutList();
535 lyx_view_->setBusy(false);
536 need_resize_ = false;
540 void GuiWorkArea::showCursor()
546 bool l_shape = false;
547 Font const & realfont = buffer_view_->cursor().real_current_font;
548 BufferParams const & bp = buffer_view_->buffer().params();
549 bool const samelang = realfont.language() == bp.language;
550 bool const isrtl = realfont.isVisibleRightToLeft();
552 if (!samelang || isrtl != bp.language->rightToLeft())
555 // The ERT language hack needs fixing up
556 if (realfont.language() == latex_language)
561 buffer_view_->cursorPosAndHeight(p, h);
562 // show cursor on screen
563 Cursor & cur = buffer_view_->cursor();
564 bool completable = cur.inset().showCompletionCursor()
565 && completer_->completionAvailable()
566 && !completer_->popupVisible()
567 && !completer_->inlineVisible();
568 if (buffer_view_->cursorInView(p, h)) {
569 cursor_visible_ = true;
570 showCursor(p.x_, p.y_, h, l_shape, isrtl, completable);
575 void GuiWorkArea::hideCursor()
577 if (!cursor_visible_)
580 cursor_visible_ = false;
585 void GuiWorkArea::toggleCursor()
594 void GuiWorkArea::updateScrollbar()
596 ScrollbarParameters const & scroll_ = buffer_view_->scrollbarParameters();
597 // WARNING: don't touch at the scrollbar value like this:
598 // verticalScrollBar()->setValue(scroll_.position);
599 // because this would cause a recursive signal/slot calling with
600 // GuiWorkArea::scrollTo
601 verticalScrollBar()->setRange(scroll_.min, scroll_.max);
602 verticalScrollBar()->setPageStep(scroll_.page_step);
603 verticalScrollBar()->setSingleStep(scroll_.single_step);
604 verticalScrollBar()->setSliderPosition(scroll_.position);
608 void GuiWorkArea::scrollTo(int value)
610 stopBlinkingCursor();
611 buffer_view_->scrollDocView(value);
613 if (lyxrc.cursor_follows_scrollbar) {
614 buffer_view_->setCursorFromScrollbar();
615 lyx_view_->updateLayoutList();
617 // Show the cursor immediately after any operation.
618 startBlinkingCursor();
619 QApplication::syncX();
623 bool GuiWorkArea::event(QEvent * e)
626 case QEvent::ToolTip: {
627 QHelpEvent * helpEvent = static_cast<QHelpEvent *>(e);
628 if (lyxrc.use_tooltip) {
629 QPoint pos = helpEvent->pos();
630 if (pos.x() < viewport()->width()) {
631 QString s = toqstr(buffer_view_->toolTip(pos.x(), pos.y()));
632 QToolTip::showText(helpEvent->globalPos(), s);
635 QToolTip::hideText();
637 // Don't forget to accept the event!
642 case QEvent::ShortcutOverride: {
643 // We catch this event in order to catch the Tab or Shift+Tab key press
644 // which are otherwise reserved to focus switching between controls
646 QKeyEvent * ke = static_cast<QKeyEvent*>(e);
647 if ((ke->key() != Qt::Key_Tab && ke->key() != Qt::Key_Backtab)
648 || ke->modifiers() & Qt::ControlModifier)
649 return QAbstractScrollArea::event(e);
655 return QAbstractScrollArea::event(e);
661 void GuiWorkArea::contextMenuEvent(QContextMenuEvent * e)
664 if (e->reason() == QContextMenuEvent::Mouse)
665 // the position is set on mouse press
666 pos = context_target_pos_;
669 Cursor const & cur = buffer_view_->cursor();
670 if (e->reason() == QContextMenuEvent::Keyboard && cur.inTexted()) {
671 // Do not access the context menu of math right in front of before
672 // the cursor. This does not work when the cursor is in text.
673 Inset * inset = cur.paragraph().getInset(cur.pos());
674 if (inset && inset->asInsetMath())
676 else if (cur.pos() > 0) {
677 Inset * inset = cur.paragraph().getInset(cur.pos() - 1);
682 docstring name = buffer_view_->contextMenu(pos.x(), pos.y());
684 QAbstractScrollArea::contextMenuEvent(e);
687 QMenu * menu = guiApp->menus().menu(toqstr(name), *lyx_view_);
689 QAbstractScrollArea::contextMenuEvent(e);
692 // Position the menu to the right.
693 // FIXME: menu position should be different for RTL text.
694 menu->exec(e->globalPos());
699 void GuiWorkArea::focusInEvent(QFocusEvent * e)
701 LYXERR(Debug::DEBUG, "GuiWorkArea::focusInEvent(): " << this << endl);
702 if (lyx_view_->currentWorkArea() != this)
703 lyx_view_->setCurrentWorkArea(this);
705 startBlinkingCursor();
706 QAbstractScrollArea::focusInEvent(e);
710 void GuiWorkArea::focusOutEvent(QFocusEvent * e)
712 LYXERR(Debug::DEBUG, "GuiWorkArea::focusOutEvent(): " << this << endl);
713 stopBlinkingCursor();
714 QAbstractScrollArea::focusOutEvent(e);
718 void GuiWorkArea::mousePressEvent(QMouseEvent * e)
720 if (dc_event_.active && dc_event_ == *e) {
721 dc_event_.active = false;
722 FuncRequest cmd(LFUN_MOUSE_TRIPLE, e->x(), e->y(),
723 q_button_state(e->button()));
729 if (e->button() == Qt::RightButton)
730 context_target_pos_ = e->pos();
732 inputContext()->reset();
734 FuncRequest const cmd(LFUN_MOUSE_PRESS, e->x(), e->y(),
735 q_button_state(e->button()));
736 dispatch(cmd, q_key_state(e->modifiers()));
741 void GuiWorkArea::mouseReleaseEvent(QMouseEvent * e)
743 if (synthetic_mouse_event_.timeout.running())
744 synthetic_mouse_event_.timeout.stop();
746 FuncRequest const cmd(LFUN_MOUSE_RELEASE, e->x(), e->y(),
747 q_button_state(e->button()));
753 void GuiWorkArea::mouseMoveEvent(QMouseEvent * e)
755 // we kill the triple click if we move
756 doubleClickTimeout();
757 FuncRequest cmd(LFUN_MOUSE_MOTION, e->x(), e->y(),
758 q_motion_state(e->buttons()));
762 // If we're above or below the work area...
763 if (e->y() <= 20 || e->y() >= viewport()->height() - 20) {
764 // Make sure only a synthetic event can cause a page scroll,
765 // so they come at a steady rate:
767 // _Force_ a scroll up:
770 cmd.y = viewport()->height();
771 // Store the event, to be handled when the timeout expires.
772 synthetic_mouse_event_.cmd = cmd;
774 if (synthetic_mouse_event_.timeout.running())
775 // Discard the event. Note that it _may_ be handled
776 // when the timeout expires if
777 // synthetic_mouse_event_.cmd has not been overwritten.
778 // Ie, when the timeout expires, we handle the
779 // most recent event but discard all others that
780 // occurred after the one used to start the timeout
781 // in the first place.
784 synthetic_mouse_event_.restart_timeout = true;
785 synthetic_mouse_event_.timeout.start();
786 // Fall through to handle this event...
788 } else if (synthetic_mouse_event_.timeout.running()) {
789 // Store the event, to be possibly handled when the timeout
791 // Once the timeout has expired, normal control is returned
792 // to mouseMoveEvent (restart_timeout = false).
793 // This results in a much smoother 'feel' when moving the
794 // mouse back into the work area.
795 synthetic_mouse_event_.cmd = cmd;
796 synthetic_mouse_event_.restart_timeout = false;
800 // Has anything changed on-screen since the last QMouseEvent
802 if (e->x() == synthetic_mouse_event_.x_old
803 && e->y() == synthetic_mouse_event_.y_old
804 && synthetic_mouse_event_.min_scrollbar_old == verticalScrollBar()->minimum()
805 && synthetic_mouse_event_.max_scrollbar_old == verticalScrollBar()->maximum()) {
806 // Nothing changed on-screen since the last QMouseEvent.
810 // Yes something has changed. Store the params used to check this.
811 synthetic_mouse_event_.x_old = e->x();
812 synthetic_mouse_event_.y_old = e->y();
813 synthetic_mouse_event_.min_scrollbar_old = verticalScrollBar()->minimum();
814 synthetic_mouse_event_.max_scrollbar_old = verticalScrollBar()->maximum();
816 // ... and dispatch the event to the LyX core.
821 void GuiWorkArea::wheelEvent(QWheelEvent * ev)
823 // Wheel rotation by one notch results in a delta() of 120 (see
824 // documentation of QWheelEvent)
825 int const delta = ev->delta() / 120;
826 if (ev->modifiers() & Qt::ControlModifier) {
827 docstring arg = convert<docstring>(5 * delta);
828 lyx::dispatch(FuncRequest(LFUN_BUFFER_ZOOM_IN, arg));
832 // Take into account the desktop wide settings.
833 int const lines = qApp->wheelScrollLines();
834 int const page_step = verticalScrollBar()->pageStep();
835 // Test if the wheel mouse is set to one screen at a time.
836 int scroll_value = lines > page_step
837 ? page_step : lines * verticalScrollBar()->singleStep();
839 // Take into account the rotation.
840 scroll_value *= delta;
842 // Take into account user preference.
843 scroll_value = int(scroll_value * lyxrc.mouse_wheel_speed);
844 LYXERR(Debug::SCROLLING, "wheelScrollLines = " << lines
845 << " delta = " << delta << " scroll_value = " << scroll_value
846 << " page_step = " << page_step);
848 verticalScrollBar()->setValue(verticalScrollBar()->value() - scroll_value);
854 void GuiWorkArea::generateSyntheticMouseEvent()
856 // Set things off to generate the _next_ 'pseudo' event.
857 if (synthetic_mouse_event_.restart_timeout)
858 synthetic_mouse_event_.timeout.start();
860 // Has anything changed on-screen since the last timeout signal
862 int const min_scrollbar = verticalScrollBar()->minimum();
863 int const max_scrollbar = verticalScrollBar()->maximum();
864 if (min_scrollbar == synthetic_mouse_event_.min_scrollbar_old
865 && max_scrollbar == synthetic_mouse_event_.max_scrollbar_old) {
868 // Yes it has. Store the params used to check this.
869 synthetic_mouse_event_.min_scrollbar_old = min_scrollbar;
870 synthetic_mouse_event_.max_scrollbar_old = max_scrollbar;
871 // ... and dispatch the event to the LyX core.
872 dispatch(synthetic_mouse_event_.cmd);
876 void GuiWorkArea::keyPressEvent(QKeyEvent * ev)
878 // Do not process here some keys if dialog_mode_ is set
880 && (ev->modifiers() == Qt::NoModifier
881 || ev->modifiers() == Qt::ShiftModifier)
882 && (ev->key() == Qt::Key_Escape
883 || ev->key() == Qt::Key_Enter
884 || ev->key() == Qt::Key_Return)
890 // intercept some keys if completion popup is visible
891 if (completer_->popupVisible()) {
895 completer_->activate();
901 // do nothing if there are other events
902 // (the auto repeated events come too fast)
903 // \todo FIXME: remove hard coded Qt keys, process the key binding
905 if (XEventsQueued(QX11Info::display(), 0) > 1 && ev->isAutoRepeat()
906 && (Qt::Key_PageDown || Qt::Key_PageUp)) {
907 LYXERR(Debug::KEY, "system is busy: scroll key event ignored");
913 LYXERR(Debug::KEY, " count: " << ev->count() << " text: " << ev->text()
914 << " isAutoRepeat: " << ev->isAutoRepeat() << " key: " << ev->key());
917 setKeySymbol(&sym, ev);
919 processKeySym(sym, q_key_state(ev->modifiers()));
927 void GuiWorkArea::doubleClickTimeout()
929 dc_event_.active = false;
933 void GuiWorkArea::mouseDoubleClickEvent(QMouseEvent * ev)
935 dc_event_ = DoubleClick(ev);
936 QTimer::singleShot(QApplication::doubleClickInterval(), this,
937 SLOT(doubleClickTimeout()));
938 FuncRequest cmd(LFUN_MOUSE_DOUBLE,
940 q_button_state(ev->button()));
946 void GuiWorkArea::resizeEvent(QResizeEvent * ev)
948 QAbstractScrollArea::resizeEvent(ev);
954 void GuiWorkArea::update(int x, int y, int w, int h)
956 viewport()->repaint(x, y, w, h);
960 void GuiWorkArea::paintEvent(QPaintEvent * ev)
962 QRect const rc = ev->rect();
963 // LYXERR(Debug::PAINTING, "paintEvent begin: x: " << rc.x()
964 // << " y: " << rc.y() << " w: " << rc.width() << " h: " << rc.height());
967 screen_ = QPixmap(viewport()->width(), viewport()->height());
969 if (cursor_visible_) {
975 QPainter pain(viewport());
976 pain.drawPixmap(rc, screen_, rc);
982 void GuiWorkArea::updateScreen()
984 GuiPainter pain(&screen_);
985 buffer_view_->draw(pain);
989 void GuiWorkArea::showCursor(int x, int y, int h,
990 bool l_shape, bool rtl, bool completable)
992 if (schedule_redraw_) {
993 // This happens when a graphic conversion is finished. As we don't know
994 // the size of the new graphics, it's better the update everything.
995 // We can't use redraw() here because this would trigger a infinite
996 // recursive loop with showCursor().
997 buffer_view_->resize(viewport()->width(), viewport()->height());
1000 viewport()->update(QRect(0, 0, viewport()->width(), viewport()->height()));
1001 schedule_redraw_ = false;
1002 // Show the cursor immediately after the update.
1008 cursor_->update(x, y, h, l_shape, rtl, completable);
1010 viewport()->update(cursor_->rect());
1014 void GuiWorkArea::removeCursor()
1017 //if (!qApp->focusWidget())
1018 viewport()->update(cursor_->rect());
1022 void GuiWorkArea::inputMethodEvent(QInputMethodEvent * e)
1024 QString const & commit_string = e->commitString();
1025 docstring const & preedit_string
1026 = qstring_to_ucs4(e->preeditString());
1028 if (!commit_string.isEmpty()) {
1030 LYXERR(Debug::KEY, "preeditString: " << e->preeditString()
1031 << " commitString: " << e->commitString());
1035 // FIXME Iwami 04/01/07: we should take care also of UTF16 surrogates here.
1036 for (int i = 0; i != commit_string.size(); ++i) {
1037 QKeyEvent ev(QEvent::KeyPress, key, Qt::NoModifier, commit_string[i]);
1042 // Hide the cursor during the kana-kanji transformation.
1043 if (preedit_string.empty())
1044 startBlinkingCursor();
1046 stopBlinkingCursor();
1048 // last_width : for checking if last preedit string was/wasn't empty.
1049 static bool last_width = false;
1050 if (!last_width && preedit_string.empty()) {
1051 // if last_width is last length of preedit string.
1056 GuiPainter pain(&screen_);
1057 buffer_view_->updateMetrics();
1058 buffer_view_->draw(pain);
1059 FontInfo font = buffer_view_->cursor().getFont().fontInfo();
1060 FontMetrics const & fm = theFontMetrics(font);
1061 int height = fm.maxHeight();
1062 int cur_x = cursor_->rect().left();
1063 int cur_y = cursor_->rect().bottom();
1065 // redraw area of preedit string.
1066 update(0, cur_y - height, viewport()->width(),
1067 (height + 1) * preedit_lines_);
1069 if (preedit_string.empty()) {
1077 // att : stores an IM attribute.
1078 QList<QInputMethodEvent::Attribute> const & att = e->attributes();
1080 // get attributes of input method cursor.
1081 // cursor_pos : cursor position in preedit string.
1082 size_t cursor_pos = 0;
1083 bool cursor_is_visible = false;
1084 for (int i = 0; i != att.size(); ++i) {
1085 if (att.at(i).type == QInputMethodEvent::Cursor) {
1086 cursor_pos = att.at(i).start;
1087 cursor_is_visible = att.at(i).length != 0;
1092 size_t preedit_length = preedit_string.length();
1094 // get position of selection in input method.
1095 // FIXME: isn't there a way to do this simplier?
1096 // rStart : cursor position in selected string in IM.
1098 // rLength : selected string length in IM.
1100 if (cursor_pos < preedit_length) {
1101 for (int i = 0; i != att.size(); ++i) {
1102 if (att.at(i).type == QInputMethodEvent::TextFormat) {
1103 if (att.at(i).start <= int(cursor_pos)
1104 && int(cursor_pos) < att.at(i).start + att.at(i).length) {
1105 rStart = att.at(i).start;
1106 rLength = att.at(i).length;
1107 if (!cursor_is_visible)
1108 cursor_pos += rLength;
1115 rStart = cursor_pos;
1119 int const right_margin = buffer_view_->rightMargin();
1120 Painter::preedit_style ps;
1121 // Most often there would be only one line:
1123 for (size_t pos = 0; pos != preedit_length; ++pos) {
1124 char_type const typed_char = preedit_string[pos];
1125 // reset preedit string style
1126 ps = Painter::preedit_default;
1128 // if we reached the right extremity of the screen, go to next line.
1129 if (cur_x + fm.width(typed_char) > viewport()->width() - right_margin) {
1130 cur_x = right_margin;
1131 cur_y += height + 1;
1134 // preedit strings are displayed with dashed underline
1135 // and partial strings are displayed white on black indicating
1136 // that we are in selecting mode in the input method.
1137 // FIXME: rLength == preedit_length is not a changing condition
1138 // FIXME: should be put out of the loop.
1140 && pos < rStart + rLength
1141 && !(cursor_pos < rLength && rLength == preedit_length))
1142 ps = Painter::preedit_selecting;
1144 if (pos == cursor_pos
1145 && (cursor_pos < rLength && rLength == preedit_length))
1146 ps = Painter::preedit_cursor;
1148 // draw one character and update cur_x.
1149 cur_x += pain.preeditText(cur_x, cur_y, typed_char, font, ps);
1152 // update the preedit string screen area.
1153 update(0, cur_y - preedit_lines_*height, viewport()->width(),
1154 (height + 1) * preedit_lines_);
1156 // Don't forget to accept the event!
1161 QVariant GuiWorkArea::inputMethodQuery(Qt::InputMethodQuery query) const
1163 QRect cur_r(0, 0, 0, 0);
1165 // this is the CJK-specific composition window position and
1166 // the context menu position when the menu key is pressed.
1167 case Qt::ImMicroFocus:
1168 cur_r = cursor_->rect();
1169 if (preedit_lines_ != 1)
1171 cur_r.moveBottom(cur_r.bottom()
1172 + cur_r.height() * (preedit_lines_ - 1));
1173 // return lower right of cursor in LyX.
1176 return QWidget::inputMethodQuery(query);
1181 void GuiWorkArea::updateWindowTitle()
1183 docstring maximize_title;
1184 docstring minimize_title;
1186 Buffer & buf = buffer_view_->buffer();
1187 FileName const fileName = buf.fileName();
1188 if (!fileName.empty()) {
1189 maximize_title = fileName.displayName(30);
1190 minimize_title = from_utf8(fileName.onlyFileName());
1191 if (buf.lyxvc().inUse()) {
1192 if (buf.lyxvc().locker().empty())
1193 maximize_title += _(" (version control)");
1195 maximize_title += _(" (version control, locking)");
1197 if (!buf.isClean()) {
1198 maximize_title += _(" (changed)");
1199 minimize_title += char_type('*');
1201 if (buf.isReadonly())
1202 maximize_title += _(" (read only)");
1205 QString title = windowTitle();
1206 QString new_title = toqstr(maximize_title);
1207 if (title == new_title)
1210 QWidget::setWindowTitle(new_title);
1211 QWidget::setWindowIconText(toqstr(minimize_title));
1216 void GuiWorkArea::setReadOnly(bool)
1218 updateWindowTitle();
1219 if (this == lyx_view_->currentWorkArea())
1220 lyx_view_->updateDialogs();
1224 bool GuiWorkArea::isFullScreen()
1226 return lyx_view_ && lyx_view_->isFullScreen();
1230 ////////////////////////////////////////////////////////////////////
1234 ////////////////////////////////////////////////////////////////////
1237 EmbeddedWorkArea::EmbeddedWorkArea(QWidget * w): GuiWorkArea(w)
1239 buffer_ = theBufferList().newBuffer(
1240 support::FileName::tempName().absFilename() + "_embedded.internal");
1241 buffer_->setUnnamed(true);
1242 buffer_->setFullyLoaded(true);
1243 setBuffer(*buffer_);
1244 setDialogMode(true);
1248 EmbeddedWorkArea::~EmbeddedWorkArea()
1250 // No need to destroy buffer and bufferview here, because it is done
1251 // in theBuffeerList() destruction loop at application exit
1255 void EmbeddedWorkArea::closeEvent(QCloseEvent * ev)
1258 GuiWorkArea::closeEvent(ev);
1262 void EmbeddedWorkArea::hideEvent(QHideEvent * ev)
1265 GuiWorkArea::hideEvent(ev);
1269 void EmbeddedWorkArea::disable()
1271 stopBlinkingCursor();
1272 if (view().currentWorkArea() != this)
1274 // No problem if currentMainWorkArea() is 0 (setCurrentWorkArea()
1275 // tolerates it and shows the background logo), what happens if
1276 // an EmbeddedWorkArea is closed after closing all document WAs
1277 view().setCurrentWorkArea(view().currentMainWorkArea());
1280 ////////////////////////////////////////////////////////////////////
1284 ////////////////////////////////////////////////////////////////////
1287 class NoTabFrameMacStyle : public QMacStyle {
1290 QRect subElementRect(SubElement element, const QStyleOption * option,
1291 const QWidget * widget = 0) const
1293 QRect rect = QMacStyle::subElementRect(element, option, widget);
1294 bool noBar = static_cast<QTabWidget const *>(widget)->count() <= 1;
1296 // The Qt Mac style puts the contents into a 3 pixel wide box
1297 // which looks very ugly and not like other Mac applications.
1298 // Hence we remove this here, and moreover the 16 pixel round
1299 // frame above if the tab bar is hidden.
1300 if (element == QStyle::SE_TabWidgetTabContents) {
1301 rect.adjust(- rect.left(), 0, rect.left(), 0);
1310 NoTabFrameMacStyle noTabFrameMacStyle;
1314 TabWorkArea::TabWorkArea(QWidget * parent)
1315 : QTabWidget(parent), clicked_tab_(-1)
1318 setStyle(&noTabFrameMacStyle);
1320 #if QT_VERSION < 0x040500
1321 lyxrc.single_close_tab_button = true;
1324 QPalette pal = palette();
1325 pal.setColor(QPalette::Active, QPalette::Button,
1326 pal.color(QPalette::Active, QPalette::Window));
1327 pal.setColor(QPalette::Disabled, QPalette::Button,
1328 pal.color(QPalette::Disabled, QPalette::Window));
1329 pal.setColor(QPalette::Inactive, QPalette::Button,
1330 pal.color(QPalette::Inactive, QPalette::Window));
1332 QObject::connect(this, SIGNAL(currentChanged(int)),
1333 this, SLOT(on_currentTabChanged(int)));
1335 closeBufferButton = new QToolButton(this);
1336 closeBufferButton->setPalette(pal);
1337 // FIXME: rename the icon to closebuffer.png
1338 closeBufferButton->setIcon(QIcon(getPixmap("images/", "closetab", "png")));
1339 closeBufferButton->setText("Close File");
1340 closeBufferButton->setAutoRaise(true);
1341 closeBufferButton->setCursor(Qt::ArrowCursor);
1342 closeBufferButton->setToolTip(qt_("Close File"));
1343 closeBufferButton->setEnabled(true);
1344 QObject::connect(closeBufferButton, SIGNAL(clicked()),
1345 this, SLOT(closeCurrentBuffer()));
1346 setCornerWidget(closeBufferButton, Qt::TopRightCorner);
1348 // setup drag'n'drop
1349 QTabBar* tb = new DragTabBar;
1350 connect(tb, SIGNAL(tabMoveRequested(int, int)),
1351 this, SLOT(moveTab(int, int)));
1352 tb->setElideMode(Qt::ElideNone);
1355 // make us responsible for the context menu of the tabbar
1356 tb->setContextMenuPolicy(Qt::CustomContextMenu);
1357 connect(tb, SIGNAL(customContextMenuRequested(const QPoint &)),
1358 this, SLOT(showContextMenu(const QPoint &)));
1359 #if QT_VERSION >= 0x040500
1360 connect(tb, SIGNAL(tabCloseRequested(int)),
1361 this, SLOT(closeTab(int)));
1364 setUsesScrollButtons(true);
1368 void TabWorkArea::setFullScreen(bool full_screen)
1370 for (int i = 0; i != count(); ++i) {
1371 if (GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i)))
1372 wa->setFullScreen(full_screen);
1375 if (lyxrc.full_screen_tabbar)
1376 showBar(!full_screen && count() > 1);
1380 void TabWorkArea::showBar(bool show)
1382 tabBar()->setEnabled(show);
1383 tabBar()->setVisible(show);
1384 closeBufferButton->setVisible(show && lyxrc.single_close_tab_button);
1385 #if QT_VERSION >= 0x040500
1386 setTabsClosable(!lyxrc.single_close_tab_button);
1391 GuiWorkArea * TabWorkArea::currentWorkArea()
1396 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(currentWidget());
1402 GuiWorkArea * TabWorkArea::workArea(Buffer & buffer)
1404 for (int i = 0; i != count(); ++i) {
1405 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i));
1406 LASSERT(wa, return 0);
1407 if (&wa->bufferView().buffer() == &buffer)
1414 void TabWorkArea::closeAll()
1417 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(0));
1425 bool TabWorkArea::setCurrentWorkArea(GuiWorkArea * work_area)
1427 LASSERT(work_area, /**/);
1428 int index = indexOf(work_area);
1432 if (index == currentIndex())
1433 // Make sure the work area is up to date.
1434 on_currentTabChanged(index);
1436 // Switch to the work area.
1437 setCurrentIndex(index);
1438 work_area->setFocus();
1444 GuiWorkArea * TabWorkArea::addWorkArea(Buffer & buffer, GuiView & view)
1446 GuiWorkArea * wa = new GuiWorkArea(buffer, view);
1447 wa->setUpdatesEnabled(false);
1448 // Hide tabbar if there's no tab (avoid a resize and a flashing tabbar
1449 // when hiding it again below).
1450 if (!(currentWorkArea() && currentWorkArea()->isFullScreen()))
1451 showBar(count() > 0);
1452 addTab(wa, wa->windowTitle());
1453 QObject::connect(wa, SIGNAL(titleChanged(GuiWorkArea *)),
1454 this, SLOT(updateTabTexts()));
1455 if (currentWorkArea() && currentWorkArea()->isFullScreen())
1456 setFullScreen(true);
1458 // Hide tabbar if there's only one tab.
1459 showBar(count() > 1);
1467 bool TabWorkArea::removeWorkArea(GuiWorkArea * work_area)
1469 LASSERT(work_area, return false);
1470 int index = indexOf(work_area);
1474 work_area->setUpdatesEnabled(false);
1479 // make sure the next work area is enabled.
1480 currentWidget()->setUpdatesEnabled(true);
1481 if (currentWorkArea() && currentWorkArea()->isFullScreen())
1482 setFullScreen(true);
1484 // Show tabbar only if there's more than one tab.
1485 showBar(count() > 1);
1487 lastWorkAreaRemoved();
1495 void TabWorkArea::on_currentTabChanged(int i)
1497 // returns e.g. on application destruction
1500 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i));
1501 LASSERT(wa, return);
1502 wa->setUpdatesEnabled(true);
1506 currentWorkAreaChanged(wa);
1508 LYXERR(Debug::GUI, "currentTabChanged " << i
1509 << " File: " << wa->bufferView().buffer().absFileName());
1513 void TabWorkArea::closeCurrentBuffer()
1516 if (clicked_tab_ == -1)
1517 wa = currentWorkArea();
1519 wa = dynamic_cast<GuiWorkArea *>(widget(clicked_tab_));
1522 wa->view().closeWorkArea(wa);
1526 void TabWorkArea::hideCurrentTab()
1529 if (clicked_tab_ == -1)
1530 wa = currentWorkArea();
1532 wa = dynamic_cast<GuiWorkArea *>(widget(clicked_tab_));
1535 wa->view().hideWorkArea(wa);
1539 void TabWorkArea::closeTab(int index)
1541 on_currentTabChanged(index);
1544 wa = currentWorkArea();
1546 wa = dynamic_cast<GuiWorkArea *>(widget(index));
1549 wa->view().closeWorkArea(wa);
1556 /// make vector happy
1559 DisplayPath(int tab, FileName const & filename)
1562 filename_ = (filename.extension() == "lyx") ?
1563 toqstr(filename.onlyFileNameWithoutExt())
1564 : toqstr(filename.onlyFileName());
1565 postfix_ = toqstr(filename.absoluteFilePath()).
1566 split("/", QString::SkipEmptyParts);
1567 postfix_.pop_back();
1568 abs_ = toqstr(filename.absoluteFilePath());
1569 dottedPrefix_ = false;
1572 /// Absolute path for debugging.
1577 /// Add the first segment from the postfix or three dots to the prefix.
1578 /// Merge multiple dot tripples. In fact dots are added lazily, i.e. only
1579 /// when really needed.
1580 void shiftPathSegment(bool dotted)
1582 if (postfix_.count() <= 0)
1586 if (dottedPrefix_ && !prefix_.isEmpty())
1588 prefix_ += postfix_.front() + "/";
1590 dottedPrefix_ = dotted && !prefix_.isEmpty();
1591 postfix_.pop_front();
1594 QString displayString() const
1596 if (prefix_.isEmpty())
1599 bool dots = dottedPrefix_ || !postfix_.isEmpty();
1600 return prefix_ + (dots ? ".../" : "") + filename_;
1603 QString forecastPathString() const
1605 if (postfix_.count() == 0)
1606 return displayString();
1609 + (dottedPrefix_ ? ".../" : "")
1610 + postfix_.front() + "/";
1613 bool final() const { return postfix_.empty(); }
1615 int tab() const { return tab_; }
1621 QStringList postfix_;
1634 bool operator<(DisplayPath const & a, DisplayPath const & b)
1636 return a.displayString() < b.displayString();
1640 bool operator==(DisplayPath const & a, DisplayPath const & b)
1642 return a.displayString() == b.displayString();
1646 void TabWorkArea::updateTabTexts()
1651 std::list<DisplayPath> paths;
1652 typedef std::list<DisplayPath>::iterator It;
1654 // collect full names first: path into postfix, empty prefix and
1655 // filename without extension
1656 for (size_t i = 0; i < n; ++i) {
1657 GuiWorkArea * i_wa = dynamic_cast<GuiWorkArea *>(widget(i));
1658 FileName const fn = i_wa->bufferView().buffer().fileName();
1659 paths.push_back(DisplayPath(i, fn));
1662 // go through path segments and see if it helps to make the path more unique
1663 bool somethingChanged = true;
1664 bool allFinal = false;
1665 while (somethingChanged && !allFinal) {
1666 // adding path segments changes order
1669 LYXERR(Debug::GUI, "updateTabTexts() iteration start");
1670 somethingChanged = false;
1673 // find segments which are not unique (i.e. non-atomic)
1674 It it = paths.begin();
1676 QString segString = it->displayString();
1677 for (; it != paths.end(); ++it) {
1678 // look to the next item
1683 allFinal = allFinal && it->final();
1685 LYXERR(Debug::GUI, "it = " << it->abs()
1686 << " => " << it->displayString());
1688 // still the same segment?
1690 if ((next != paths.end()
1691 && (nextString = next->displayString()) == segString))
1693 LYXERR(Debug::GUI, "segment ended");
1695 // only a trivial one with one element?
1696 if (it == segStart) {
1697 // start new segment
1699 segString = nextString;
1703 // we found a non-atomic segment segStart <= sit <= it < next.
1704 // Shift path segments and hope for the best
1705 // that it makes the path more unique.
1706 somethingChanged = true;
1708 QString dspString = sit->forecastPathString();
1709 LYXERR(Debug::GUI, "first forecast found for "
1710 << sit->abs() << " => " << dspString);
1712 bool moreUnique = false;
1713 for (; sit != next; ++sit) {
1714 if (sit->forecastPathString() != dspString) {
1715 LYXERR(Debug::GUI, "different forecast found for "
1716 << sit->abs() << " => " << sit->forecastPathString());
1720 LYXERR(Debug::GUI, "same forecast found for "
1721 << sit->abs() << " => " << dspString);
1724 // if the path segment helped, add it. Otherwise add dots
1725 bool dots = !moreUnique;
1726 LYXERR(Debug::GUI, "using dots = " << dots);
1727 for (sit = segStart; sit != next; ++sit) {
1728 sit->shiftPathSegment(dots);
1729 LYXERR(Debug::GUI, "shifting "
1730 << sit->abs() << " => " << sit->displayString());
1733 // start new segment
1735 segString = nextString;
1739 // set new tab titles
1740 for (It it = paths.begin(); it != paths.end(); ++it) {
1741 GuiWorkArea * i_wa = dynamic_cast<GuiWorkArea *>(widget(it->tab()));
1742 Buffer & buf = i_wa->bufferView().buffer();
1743 if (!buf.fileName().empty() && !buf.isClean())
1744 setTabText(it->tab(), it->displayString() + "*");
1746 setTabText(it->tab(), it->displayString());
1751 void TabWorkArea::showContextMenu(const QPoint & pos)
1754 clicked_tab_ = static_cast<DragTabBar *>(tabBar())->tabAt(pos);
1755 if (clicked_tab_ == -1)
1760 popup.addAction(QIcon(getPixmap("images/", "hidetab", "png")),
1761 qt_("Hide tab"), this, SLOT(hideCurrentTab()));
1762 popup.addAction(QIcon(getPixmap("images/", "closetab", "png")),
1763 qt_("Close tab"), this, SLOT(closeCurrentBuffer()));
1764 popup.exec(tabBar()->mapToGlobal(pos));
1770 void TabWorkArea::moveTab(int fromIndex, int toIndex)
1772 QWidget * w = widget(fromIndex);
1773 QIcon icon = tabIcon(fromIndex);
1774 QString text = tabText(fromIndex);
1776 setCurrentIndex(fromIndex);
1777 removeTab(fromIndex);
1778 insertTab(toIndex, w, icon, text);
1779 setCurrentIndex(toIndex);
1783 DragTabBar::DragTabBar(QWidget* parent)
1786 setAcceptDrops(true);
1787 #if QT_VERSION >= 0x040500
1788 setTabsClosable(!lyxrc.single_close_tab_button);
1793 #if QT_VERSION < 0x040300
1794 int DragTabBar::tabAt(QPoint const & position) const
1796 const int max = count();
1797 for (int i = 0; i < max; ++i) {
1798 if (tabRect(i).contains(position))
1806 void DragTabBar::mousePressEvent(QMouseEvent * event)
1808 if (event->button() == Qt::LeftButton)
1809 dragStartPos_ = event->pos();
1810 QTabBar::mousePressEvent(event);
1814 void DragTabBar::mouseMoveEvent(QMouseEvent * event)
1816 // If the left button isn't pressed anymore then return
1817 if (!(event->buttons() & Qt::LeftButton))
1820 // If the distance is too small then return
1821 if ((event->pos() - dragStartPos_).manhattanLength()
1822 < QApplication::startDragDistance())
1825 // did we hit something after all?
1826 int tab = tabAt(dragStartPos_);
1830 // simulate button release to remove highlight from button
1831 int i = currentIndex();
1832 QMouseEvent me(QEvent::MouseButtonRelease, dragStartPos_,
1833 event->button(), event->buttons(), 0);
1834 QTabBar::mouseReleaseEvent(&me);
1838 QDrag * drag = new QDrag(this);
1839 QMimeData * mimeData = new QMimeData;
1840 // a crude way to distinguish tab-reodering drops from other ones
1841 mimeData->setData("action", "tab-reordering") ;
1842 drag->setMimeData(mimeData);
1844 #if QT_VERSION >= 0x040300
1845 // get tab pixmap as cursor
1846 QRect r = tabRect(tab);
1847 QPixmap pixmap(r.size());
1848 render(&pixmap, - r.topLeft());
1849 drag->setPixmap(pixmap);
1852 drag->start(Qt::MoveAction);
1858 void DragTabBar::dragEnterEvent(QDragEnterEvent * event)
1860 // Only accept if it's an tab-reordering request
1861 QMimeData const * m = event->mimeData();
1862 QStringList formats = m->formats();
1863 if (formats.contains("action")
1864 && m->data("action") == "tab-reordering")
1865 event->acceptProposedAction();
1869 void DragTabBar::dropEvent(QDropEvent * event)
1871 int fromIndex = tabAt(dragStartPos_);
1872 int toIndex = tabAt(event->pos());
1874 // Tell interested objects that
1875 if (fromIndex != toIndex)
1876 tabMoveRequested(fromIndex, toIndex);
1877 event->acceptProposedAction();
1881 } // namespace frontend
1884 #include "moc_GuiWorkArea.cpp"