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(-1.0), max_scrollbar_old(-1.0)
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)),
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)),
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.
324 // delete completer_;
328 void GuiWorkArea::setGuiView(GuiView & gv)
334 void GuiWorkArea::setBuffer(Buffer & buffer)
337 buffer_view_ = new BufferView(buffer),
338 buffer.workAreaManager().add(this);
340 // HACK: Prevents an additional redraw when the scrollbar pops up
341 // which regularily happens on documents with more than one page.
342 // The policy should be set to "Qt::ScrollBarAsNeeded" soon.
343 // Since we have no geometry information yet, we assume that
344 // a document needs a scrollbar if there is more then four
345 // paragraph in the outermost text.
346 if (buffer.text().paragraphs().size() > 4)
347 setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
348 QTimer::singleShot(50, this, SLOT(fixVerticalScrollBar()));
352 void GuiWorkArea::fixVerticalScrollBar()
355 setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
359 void GuiWorkArea::close()
361 lyx_view_->removeWorkArea(this);
365 void GuiWorkArea::setFullScreen(bool full_screen)
367 buffer_view_->setFullScreen(full_screen);
368 setFrameStyle(QFrame::NoFrame);
370 setFrameStyle(QFrame::NoFrame);
371 if (lyxrc.full_screen_scrollbar)
372 setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
374 setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
378 BufferView & GuiWorkArea::bufferView()
380 return *buffer_view_;
384 BufferView const & GuiWorkArea::bufferView() const
386 return *buffer_view_;
390 void GuiWorkArea::stopBlinkingCursor()
392 cursor_timeout_.stop();
397 void GuiWorkArea::startBlinkingCursor()
400 //we're not supposed to cache this value.
401 int const time = QApplication::cursorFlashTime() / 2;
404 cursor_timeout_.setInterval(time);
405 cursor_timeout_.start();
409 void GuiWorkArea::redraw()
412 // No need to redraw in this case.
415 // No need to do anything if this is the current view. The BufferView
416 // metrics are already up to date.
417 if (lyx_view_ != guiApp->currentView()
418 || lyx_view_->currentWorkArea() != this) {
419 // FIXME: it would be nice to optimize for the off-screen case.
420 buffer_view_->updateMetrics();
421 buffer_view_->cursor().fixIfBroken();
424 // update cursor position, because otherwise it has to wait until
425 // the blinking interval is over
426 if (cursor_visible_) {
431 LYXERR(Debug::WORKAREA, "WorkArea::redraw screen");
433 update(0, 0, viewport()->width(), viewport()->height());
435 /// \warning: scrollbar updating *must* be done after the BufferView is drawn
436 /// because \c BufferView::updateScrollbar() is called in \c BufferView::draw().
438 lyx_view_->updateStatusBar();
440 if (lyxerr.debugging(Debug::WORKAREA))
441 buffer_view_->coordCache().dump();
445 void GuiWorkArea::processKeySym(KeySymbol const & key, KeyModifier mod)
447 if (lyx_view_->isFullScreen() && lyx_view_->menuBar()->isVisible()
448 && lyxrc.full_screen_menubar) {
449 // FIXME HACK: we should not have to do this here. See related comment
450 // in GuiView::event() (QEvent::ShortcutOverride)
451 lyx_view_->menuBar()->hide();
454 // In order to avoid bad surprise in the middle of an operation,
455 // we better stop the blinking cursor...
456 // the cursor gets restarted in GuiView::restartCursor()
457 stopBlinkingCursor();
459 theLyXFunc().setLyXView(lyx_view_);
460 theLyXFunc().processKeySym(key, mod);
464 void GuiWorkArea::dispatch(FuncRequest const & cmd0, KeyModifier mod)
467 if (cmd0.action == LFUN_FILE_OPEN) {
468 lyx_view_->dispatch(cmd0);
472 theLyXFunc().setLyXView(lyx_view_);
476 if (cmd0.action == LFUN_MOUSE_PRESS) {
477 if (mod == ShiftModifier)
478 cmd = FuncRequest(cmd0, "region-select");
479 else if (mod == ControlModifier)
480 cmd = FuncRequest(cmd0, "paragraph-select");
487 bool const notJustMovingTheMouse =
488 cmd.action != LFUN_MOUSE_MOTION || cmd.button() != mouse_button::none;
490 // In order to avoid bad surprise in the middle of an operation, we better stop
491 // the blinking cursor.
492 if (notJustMovingTheMouse)
493 stopBlinkingCursor();
495 buffer_view_->mouseEventDispatch(cmd);
497 // Skip these when selecting
498 if (cmd.action != LFUN_MOUSE_MOTION) {
499 completer_->updateVisibility(false, false);
500 lyx_view_->updateDialogs();
501 lyx_view_->updateStatusBar();
504 // GUI tweaks except with mouse motion with no button pressed.
505 if (notJustMovingTheMouse) {
506 // Slight hack: this is only called currently when we
507 // clicked somewhere, so we force through the display
508 // of the new status here.
509 lyx_view_->clearMessage();
511 // Show the cursor immediately after any operation
512 startBlinkingCursor();
517 void GuiWorkArea::resizeBufferView()
519 // WARNING: Please don't put any code that will trigger a repaint here!
520 // We are already inside a paint event.
521 lyx_view_->setBusy(true);
524 buffer_view_->cursorPosAndHeight(p, h);
525 bool const cursor_in_view = buffer_view_->cursorInView(p, h);
526 buffer_view_->resize(viewport()->width(), viewport()->height());
528 buffer_view_->scrollToCursor();
531 // Update scrollbars which might have changed due different
532 // BufferView dimension. This is especially important when the
533 // BufferView goes from zero-size to the real-size for the first time,
534 // as the scrollbar paramters are then set for the first time.
537 lyx_view_->updateLayoutList();
538 lyx_view_->setBusy(false);
539 need_resize_ = false;
543 void GuiWorkArea::showCursor()
549 bool l_shape = false;
550 Font const & realfont = buffer_view_->cursor().real_current_font;
551 BufferParams const & bp = buffer_view_->buffer().params();
552 bool const samelang = realfont.language() == bp.language;
553 bool const isrtl = realfont.isVisibleRightToLeft();
555 if (!samelang || isrtl != bp.language->rightToLeft())
558 // The ERT language hack needs fixing up
559 if (realfont.language() == latex_language)
564 buffer_view_->cursorPosAndHeight(p, h);
565 // show cursor on screen
566 Cursor & cur = buffer_view_->cursor();
567 bool completable = cur.inset().showCompletionCursor()
568 && completer_->completionAvailable()
569 && !completer_->popupVisible()
570 && !completer_->inlineVisible();
571 if (buffer_view_->cursorInView(p, h)) {
572 cursor_visible_ = true;
573 showCursor(p.x_, p.y_, h, l_shape, isrtl, completable);
578 void GuiWorkArea::hideCursor()
580 if (!cursor_visible_)
583 cursor_visible_ = false;
588 void GuiWorkArea::toggleCursor()
597 void GuiWorkArea::updateScrollbar()
599 ScrollbarParameters const & scroll_ = buffer_view_->scrollbarParameters();
600 // WARNING: don't touch at the scrollbar value like this:
601 // verticalScrollBar()->setValue(scroll_.position);
602 // because this would cause a recursive signal/slot calling with
603 // GuiWorkArea::scrollTo
604 verticalScrollBar()->setRange(scroll_.min, scroll_.max);
605 verticalScrollBar()->setPageStep(scroll_.page_step);
606 verticalScrollBar()->setSingleStep(scroll_.single_step);
607 verticalScrollBar()->setSliderPosition(scroll_.position);
611 void GuiWorkArea::scrollTo(int value)
613 stopBlinkingCursor();
614 buffer_view_->scrollDocView(value);
616 if (lyxrc.cursor_follows_scrollbar) {
617 buffer_view_->setCursorFromScrollbar();
618 lyx_view_->updateLayoutList();
620 // Show the cursor immediately after any operation.
621 startBlinkingCursor();
622 QApplication::syncX();
626 bool GuiWorkArea::event(QEvent * e)
629 case QEvent::ToolTip: {
630 QHelpEvent * helpEvent = static_cast<QHelpEvent *>(e);
631 if (lyxrc.use_tooltip) {
632 QPoint pos = helpEvent->pos();
633 if (pos.x() < viewport()->width()) {
634 QString s = toqstr(buffer_view_->toolTip(pos.x(), pos.y()));
635 QToolTip::showText(helpEvent->globalPos(), s);
638 QToolTip::hideText();
640 // Don't forget to accept the event!
645 case QEvent::ShortcutOverride: {
646 // We catch this event in order to catch the Tab or Shift+Tab key press
647 // which are otherwise reserved to focus switching between controls
649 QKeyEvent * ke = static_cast<QKeyEvent*>(e);
650 if ((ke->key() != Qt::Key_Tab && ke->key() != Qt::Key_Backtab)
651 || ke->modifiers() & Qt::ControlModifier)
652 return QAbstractScrollArea::event(e);
658 return QAbstractScrollArea::event(e);
664 void GuiWorkArea::contextMenuEvent(QContextMenuEvent * e)
667 if (e->reason() == QContextMenuEvent::Mouse)
668 // the position is set on mouse press
669 pos = context_target_pos_;
672 Cursor const & cur = buffer_view_->cursor();
673 if (e->reason() == QContextMenuEvent::Keyboard && cur.inTexted()) {
674 // Do not access the context menu of math right in front of before
675 // the cursor. This does not work when the cursor is in text.
676 Inset * inset = cur.paragraph().getInset(cur.pos());
677 if (inset && inset->asInsetMath())
679 else if (cur.pos() > 0) {
680 Inset * inset = cur.paragraph().getInset(cur.pos() - 1);
685 docstring name = buffer_view_->contextMenu(pos.x(), pos.y());
687 QAbstractScrollArea::contextMenuEvent(e);
690 QMenu * menu = guiApp->menus().menu(toqstr(name), *lyx_view_);
692 QAbstractScrollArea::contextMenuEvent(e);
695 // Position the menu to the right.
696 // FIXME: menu position should be different for RTL text.
697 menu->exec(e->globalPos());
702 void GuiWorkArea::focusInEvent(QFocusEvent * e)
705 LYXERR(Debug::DEBUG, "GuiWorkArea::focusInEvent(): " << this << std::endl);
706 GuiWorkArea * old_gwa = theGuiApp()->currentView()->currentWorkArea();
708 old_gwa->stopBlinkingCursor();
709 lyx_view_->setCurrentWorkArea(this);
712 if (lyx_view_->currentWorkArea() != this)
713 lyx_view_->setCurrentWorkArea(this);
715 startBlinkingCursor();
716 QAbstractScrollArea::focusInEvent(e);
720 void GuiWorkArea::focusOutEvent(QFocusEvent * e)
722 LYXERR(Debug::DEBUG, "GuiWorkArea::focusOutEvent(): " << this << std::endl);
723 stopBlinkingCursor();
724 QAbstractScrollArea::focusOutEvent(e);
728 void GuiWorkArea::mousePressEvent(QMouseEvent * e)
730 if (dc_event_.active && dc_event_ == *e) {
731 dc_event_.active = false;
732 FuncRequest cmd(LFUN_MOUSE_TRIPLE, e->x(), e->y(),
733 q_button_state(e->button()));
739 if (e->button() == Qt::RightButton)
740 context_target_pos_ = e->pos();
742 inputContext()->reset();
744 FuncRequest const cmd(LFUN_MOUSE_PRESS, e->x(), e->y(),
745 q_button_state(e->button()));
746 dispatch(cmd, q_key_state(e->modifiers()));
751 void GuiWorkArea::mouseReleaseEvent(QMouseEvent * e)
753 if (synthetic_mouse_event_.timeout.running())
754 synthetic_mouse_event_.timeout.stop();
756 FuncRequest const cmd(LFUN_MOUSE_RELEASE, e->x(), e->y(),
757 q_button_state(e->button()));
763 void GuiWorkArea::mouseMoveEvent(QMouseEvent * e)
765 // we kill the triple click if we move
766 doubleClickTimeout();
767 FuncRequest cmd(LFUN_MOUSE_MOTION, e->x(), e->y(),
768 q_motion_state(e->buttons()));
772 // If we're above or below the work area...
773 if (e->y() <= 20 || e->y() >= viewport()->height() - 20) {
774 // Make sure only a synthetic event can cause a page scroll,
775 // so they come at a steady rate:
777 // _Force_ a scroll up:
780 cmd.y = viewport()->height();
781 // Store the event, to be handled when the timeout expires.
782 synthetic_mouse_event_.cmd = cmd;
784 if (synthetic_mouse_event_.timeout.running())
785 // Discard the event. Note that it _may_ be handled
786 // when the timeout expires if
787 // synthetic_mouse_event_.cmd has not been overwritten.
788 // Ie, when the timeout expires, we handle the
789 // most recent event but discard all others that
790 // occurred after the one used to start the timeout
791 // in the first place.
794 synthetic_mouse_event_.restart_timeout = true;
795 synthetic_mouse_event_.timeout.start();
796 // Fall through to handle this event...
798 } else if (synthetic_mouse_event_.timeout.running()) {
799 // Store the event, to be possibly handled when the timeout
801 // Once the timeout has expired, normal control is returned
802 // to mouseMoveEvent (restart_timeout = false).
803 // This results in a much smoother 'feel' when moving the
804 // mouse back into the work area.
805 synthetic_mouse_event_.cmd = cmd;
806 synthetic_mouse_event_.restart_timeout = false;
810 // Has anything changed on-screen since the last QMouseEvent
812 if (e->x() == synthetic_mouse_event_.x_old
813 && e->y() == synthetic_mouse_event_.y_old
814 && synthetic_mouse_event_.min_scrollbar_old == verticalScrollBar()->minimum()
815 && synthetic_mouse_event_.max_scrollbar_old == verticalScrollBar()->maximum()) {
816 // Nothing changed on-screen since the last QMouseEvent.
820 // Yes something has changed. Store the params used to check this.
821 synthetic_mouse_event_.x_old = e->x();
822 synthetic_mouse_event_.y_old = e->y();
823 synthetic_mouse_event_.min_scrollbar_old = verticalScrollBar()->minimum();
824 synthetic_mouse_event_.max_scrollbar_old = verticalScrollBar()->maximum();
826 // ... and dispatch the event to the LyX core.
831 void GuiWorkArea::wheelEvent(QWheelEvent * ev)
833 // Wheel rotation by one notch results in a delta() of 120 (see
834 // documentation of QWheelEvent)
835 int const delta = ev->delta() / 120;
836 if (ev->modifiers() & Qt::ControlModifier) {
837 docstring arg = convert<docstring>(5 * delta);
838 lyx::dispatch(FuncRequest(LFUN_BUFFER_ZOOM_IN, arg));
842 // Take into account the desktop wide settings.
843 int const lines = qApp->wheelScrollLines();
844 int const page_step = verticalScrollBar()->pageStep();
845 // Test if the wheel mouse is set to one screen at a time.
846 int scroll_value = lines > page_step
847 ? page_step : lines * verticalScrollBar()->singleStep();
849 // Take into account the rotation.
850 scroll_value *= delta;
852 // Take into account user preference.
853 scroll_value *= lyxrc.mouse_wheel_speed;
854 LYXERR(Debug::SCROLLING, "wheelScrollLines = " << lines
855 << " delta = " << delta << " scroll_value = " << scroll_value
856 << " page_step = " << page_step);
858 verticalScrollBar()->setValue(verticalScrollBar()->value() - scroll_value);
864 void GuiWorkArea::generateSyntheticMouseEvent()
866 // Set things off to generate the _next_ 'pseudo' event.
867 if (synthetic_mouse_event_.restart_timeout)
868 synthetic_mouse_event_.timeout.start();
870 // Has anything changed on-screen since the last timeout signal
872 int const min_scrollbar = verticalScrollBar()->minimum();
873 int const max_scrollbar = verticalScrollBar()->maximum();
874 if (min_scrollbar == synthetic_mouse_event_.min_scrollbar_old
875 && max_scrollbar == synthetic_mouse_event_.max_scrollbar_old) {
878 // Yes it has. Store the params used to check this.
879 synthetic_mouse_event_.min_scrollbar_old = min_scrollbar;
880 synthetic_mouse_event_.max_scrollbar_old = max_scrollbar;
881 // ... and dispatch the event to the LyX core.
882 dispatch(synthetic_mouse_event_.cmd);
886 void GuiWorkArea::keyPressEvent(QKeyEvent * ev)
888 // Do not process here some keys if dialog_mode_ is set
890 && (ev->modifiers() == Qt::NoModifier
891 || ev->modifiers() == Qt::ShiftModifier)
892 && (ev->key() == Qt::Key_Escape
893 || ev->key() == Qt::Key_Enter
894 || ev->key() == Qt::Key_Return)
900 // intercept some keys if completion popup is visible
901 if (completer_->popupVisible()) {
905 completer_->activate();
911 // do nothing if there are other events
912 // (the auto repeated events come too fast)
913 // \todo FIXME: remove hard coded Qt keys, process the key binding
915 if (XEventsQueued(QX11Info::display(), 0) > 1 && ev->isAutoRepeat()
916 && (Qt::Key_PageDown || Qt::Key_PageUp)) {
917 LYXERR(Debug::KEY, "system is busy: scroll key event ignored");
923 LYXERR(Debug::KEY, " count: " << ev->count() << " text: " << ev->text()
924 << " isAutoRepeat: " << ev->isAutoRepeat() << " key: " << ev->key());
927 setKeySymbol(&sym, ev);
929 processKeySym(sym, q_key_state(ev->modifiers()));
937 void GuiWorkArea::doubleClickTimeout()
939 dc_event_.active = false;
943 void GuiWorkArea::mouseDoubleClickEvent(QMouseEvent * ev)
945 dc_event_ = DoubleClick(ev);
946 QTimer::singleShot(QApplication::doubleClickInterval(), this,
947 SLOT(doubleClickTimeout()));
948 FuncRequest cmd(LFUN_MOUSE_DOUBLE,
950 q_button_state(ev->button()));
956 void GuiWorkArea::resizeEvent(QResizeEvent * ev)
958 QAbstractScrollArea::resizeEvent(ev);
964 void GuiWorkArea::update(int x, int y, int w, int h)
966 viewport()->repaint(x, y, w, h);
970 void GuiWorkArea::paintEvent(QPaintEvent * ev)
972 QRect const rc = ev->rect();
973 // LYXERR(Debug::PAINTING, "paintEvent begin: x: " << rc.x()
974 // << " y: " << rc.y() << " w: " << rc.width() << " h: " << rc.height());
977 screen_ = QPixmap(viewport()->width(), viewport()->height());
983 QPainter pain(viewport());
984 pain.drawPixmap(rc, screen_, rc);
990 void GuiWorkArea::updateScreen()
992 GuiPainter pain(&screen_);
993 buffer_view_->draw(pain);
997 void GuiWorkArea::showCursor(int x, int y, int h,
998 bool l_shape, bool rtl, bool completable)
1000 if (schedule_redraw_) {
1001 // This happens when a graphic conversion is finished. As we don't know
1002 // the size of the new graphics, it's better the update everything.
1003 // We can't use redraw() here because this would trigger a infinite
1004 // recursive loop with showCursor().
1005 buffer_view_->resize(viewport()->width(), viewport()->height());
1008 viewport()->update(QRect(0, 0, viewport()->width(), viewport()->height()));
1009 schedule_redraw_ = false;
1010 // Show the cursor immediately after the update.
1016 cursor_->update(x, y, h, l_shape, rtl, completable);
1018 viewport()->update(cursor_->rect());
1022 void GuiWorkArea::removeCursor()
1025 //if (!qApp->focusWidget())
1026 viewport()->update(cursor_->rect());
1030 void GuiWorkArea::inputMethodEvent(QInputMethodEvent * e)
1032 QString const & commit_string = e->commitString();
1033 docstring const & preedit_string
1034 = qstring_to_ucs4(e->preeditString());
1036 if (!commit_string.isEmpty()) {
1038 LYXERR(Debug::KEY, "preeditString: " << e->preeditString()
1039 << " commitString: " << e->commitString());
1043 // FIXME Iwami 04/01/07: we should take care also of UTF16 surrogates here.
1044 for (int i = 0; i != commit_string.size(); ++i) {
1045 QKeyEvent ev(QEvent::KeyPress, key, Qt::NoModifier, commit_string[i]);
1050 // Hide the cursor during the kana-kanji transformation.
1051 if (preedit_string.empty())
1052 startBlinkingCursor();
1054 stopBlinkingCursor();
1056 // last_width : for checking if last preedit string was/wasn't empty.
1057 static bool last_width = false;
1058 if (!last_width && preedit_string.empty()) {
1059 // if last_width is last length of preedit string.
1064 GuiPainter pain(&screen_);
1065 buffer_view_->updateMetrics();
1066 buffer_view_->draw(pain);
1067 FontInfo font = buffer_view_->cursor().getFont().fontInfo();
1068 FontMetrics const & fm = theFontMetrics(font);
1069 int height = fm.maxHeight();
1070 int cur_x = cursor_->rect().left();
1071 int cur_y = cursor_->rect().bottom();
1073 // redraw area of preedit string.
1074 update(0, cur_y - height, viewport()->width(),
1075 (height + 1) * preedit_lines_);
1077 if (preedit_string.empty()) {
1085 // att : stores an IM attribute.
1086 QList<QInputMethodEvent::Attribute> const & att = e->attributes();
1088 // get attributes of input method cursor.
1089 // cursor_pos : cursor position in preedit string.
1090 size_t cursor_pos = 0;
1091 bool cursor_is_visible = false;
1092 for (int i = 0; i != att.size(); ++i) {
1093 if (att.at(i).type == QInputMethodEvent::Cursor) {
1094 cursor_pos = att.at(i).start;
1095 cursor_is_visible = att.at(i).length != 0;
1100 size_t preedit_length = preedit_string.length();
1102 // get position of selection in input method.
1103 // FIXME: isn't there a way to do this simplier?
1104 // rStart : cursor position in selected string in IM.
1106 // rLength : selected string length in IM.
1108 if (cursor_pos < preedit_length) {
1109 for (int i = 0; i != att.size(); ++i) {
1110 if (att.at(i).type == QInputMethodEvent::TextFormat) {
1111 if (att.at(i).start <= int(cursor_pos)
1112 && int(cursor_pos) < att.at(i).start + att.at(i).length) {
1113 rStart = att.at(i).start;
1114 rLength = att.at(i).length;
1115 if (!cursor_is_visible)
1116 cursor_pos += rLength;
1123 rStart = cursor_pos;
1127 int const right_margin = buffer_view_->rightMargin();
1128 Painter::preedit_style ps;
1129 // Most often there would be only one line:
1131 for (size_t pos = 0; pos != preedit_length; ++pos) {
1132 char_type const typed_char = preedit_string[pos];
1133 // reset preedit string style
1134 ps = Painter::preedit_default;
1136 // if we reached the right extremity of the screen, go to next line.
1137 if (cur_x + fm.width(typed_char) > viewport()->width() - right_margin) {
1138 cur_x = right_margin;
1139 cur_y += height + 1;
1142 // preedit strings are displayed with dashed underline
1143 // and partial strings are displayed white on black indicating
1144 // that we are in selecting mode in the input method.
1145 // FIXME: rLength == preedit_length is not a changing condition
1146 // FIXME: should be put out of the loop.
1148 && pos < rStart + rLength
1149 && !(cursor_pos < rLength && rLength == preedit_length))
1150 ps = Painter::preedit_selecting;
1152 if (pos == cursor_pos
1153 && (cursor_pos < rLength && rLength == preedit_length))
1154 ps = Painter::preedit_cursor;
1156 // draw one character and update cur_x.
1157 cur_x += pain.preeditText(cur_x, cur_y, typed_char, font, ps);
1160 // update the preedit string screen area.
1161 update(0, cur_y - preedit_lines_*height, viewport()->width(),
1162 (height + 1) * preedit_lines_);
1164 // Don't forget to accept the event!
1169 QVariant GuiWorkArea::inputMethodQuery(Qt::InputMethodQuery query) const
1171 QRect cur_r(0, 0, 0, 0);
1173 // this is the CJK-specific composition window position and
1174 // the context menu position when the menu key is pressed.
1175 case Qt::ImMicroFocus:
1176 cur_r = cursor_->rect();
1177 if (preedit_lines_ != 1)
1179 cur_r.moveBottom(cur_r.bottom()
1180 + cur_r.height() * (preedit_lines_ - 1));
1181 // return lower right of cursor in LyX.
1184 return QWidget::inputMethodQuery(query);
1189 void GuiWorkArea::updateWindowTitle()
1191 docstring maximize_title;
1192 docstring minimize_title;
1194 Buffer & buf = buffer_view_->buffer();
1195 FileName const fileName = buf.fileName();
1196 if (!fileName.empty()) {
1197 maximize_title = fileName.displayName(30);
1198 minimize_title = from_utf8(fileName.onlyFileName());
1199 if (buf.lyxvc().inUse()) {
1200 if (buf.lyxvc().locker().empty())
1201 maximize_title += _(" (version control)");
1203 maximize_title += _(" (version control, locking)");
1205 if (!buf.isClean()) {
1206 maximize_title += _(" (changed)");
1207 minimize_title += char_type('*');
1209 if (buf.isReadonly())
1210 maximize_title += _(" (read only)");
1213 QString title = windowTitle();
1214 QString new_title = toqstr(maximize_title);
1215 if (title == new_title)
1218 QWidget::setWindowTitle(new_title);
1219 QWidget::setWindowIconText(toqstr(minimize_title));
1224 void GuiWorkArea::setReadOnly(bool)
1226 updateWindowTitle();
1227 if (this == lyx_view_->currentWorkArea())
1228 lyx_view_->updateDialogs();
1232 bool GuiWorkArea::isFullScreen()
1234 return lyx_view_ && lyx_view_->isFullScreen();
1238 ////////////////////////////////////////////////////////////////////
1242 ////////////////////////////////////////////////////////////////////
1245 EmbeddedWorkArea::EmbeddedWorkArea(QWidget * w): GuiWorkArea(w)
1247 buffer_ = theBufferList().newBuffer(
1248 support::FileName::tempName().absFilename() + "_embedded.internal");
1249 buffer_->setUnnamed(true);
1250 buffer_->setFullyLoaded(true);
1251 setBuffer(*buffer_);
1252 setDialogMode(true);
1256 EmbeddedWorkArea::~EmbeddedWorkArea()
1258 // No need to destroy buffer and bufferview here, because it is done
1259 // in theBuffeerList() destruction loop at application exit
1263 void EmbeddedWorkArea::closeEvent(QCloseEvent * ev)
1266 GuiWorkArea::closeEvent(ev);
1270 void EmbeddedWorkArea::hideEvent(QHideEvent * ev)
1273 GuiWorkArea::hideEvent(ev);
1277 void EmbeddedWorkArea::disable()
1279 stopBlinkingCursor();
1280 if (view().currentWorkArea() != this)
1282 LASSERT(view().currentMainWorkArea(), /* */);
1283 view().setCurrentWorkArea(view().currentMainWorkArea());
1286 ////////////////////////////////////////////////////////////////////
1290 ////////////////////////////////////////////////////////////////////
1293 class NoTabFrameMacStyle : public QMacStyle {
1296 QRect subElementRect(SubElement element, const QStyleOption * option,
1297 const QWidget * widget = 0) const
1299 QRect rect = QMacStyle::subElementRect(element, option, widget);
1300 bool noBar = static_cast<QTabWidget const *>(widget)->count() <= 1;
1302 // The Qt Mac style puts the contents into a 3 pixel wide box
1303 // which looks very ugly and not like other Mac applications.
1304 // Hence we remove this here, and moreover the 16 pixel round
1305 // frame above if the tab bar is hidden.
1306 if (element == QStyle::SE_TabWidgetTabContents) {
1307 rect.adjust(- rect.left(), 0, rect.left(), 0);
1316 NoTabFrameMacStyle noTabFrameMacStyle;
1320 TabWorkArea::TabWorkArea(QWidget * parent)
1321 : QTabWidget(parent), clicked_tab_(-1)
1324 setStyle(&noTabFrameMacStyle);
1327 QPalette pal = palette();
1328 pal.setColor(QPalette::Active, QPalette::Button,
1329 pal.color(QPalette::Active, QPalette::Window));
1330 pal.setColor(QPalette::Disabled, QPalette::Button,
1331 pal.color(QPalette::Disabled, QPalette::Window));
1332 pal.setColor(QPalette::Inactive, QPalette::Button,
1333 pal.color(QPalette::Inactive, QPalette::Window));
1335 QObject::connect(this, SIGNAL(currentChanged(int)),
1336 this, SLOT(on_currentTabChanged(int)));
1338 #if QT_VERSION < 0x040500
1339 closeBufferButton = new QToolButton(this);
1340 closeBufferButton->setPalette(pal);
1341 // FIXME: rename the icon to closebuffer.png
1342 closeBufferButton->setIcon(QIcon(getPixmap("images/", "closetab", "png")));
1343 closeBufferButton->setText("Close File");
1344 closeBufferButton->setAutoRaise(true);
1345 closeBufferButton->setCursor(Qt::ArrowCursor);
1346 closeBufferButton->setToolTip(qt_("Close File"));
1347 closeBufferButton->setEnabled(true);
1348 QObject::connect(closeBufferButton, SIGNAL(clicked()),
1349 this, SLOT(closeCurrentBuffer()));
1350 setCornerWidget(closeBufferButton, Qt::TopRightCorner);
1353 // setup drag'n'drop
1354 QTabBar* tb = new DragTabBar;
1355 connect(tb, SIGNAL(tabMoveRequested(int, int)),
1356 this, SLOT(moveTab(int, int)));
1357 tb->setElideMode(Qt::ElideNone);
1360 // make us responsible for the context menu of the tabbar
1361 tb->setContextMenuPolicy(Qt::CustomContextMenu);
1362 connect(tb, SIGNAL(customContextMenuRequested(const QPoint &)),
1363 this, SLOT(showContextMenu(const QPoint &)));
1364 #if QT_VERSION >= 0x040500
1365 connect(tb, SIGNAL(tabCloseRequested(int)),
1366 tb, SLOT(on_tabCloseRequested(int)));
1369 setUsesScrollButtons(true);
1373 void TabWorkArea::setFullScreen(bool full_screen)
1375 for (int i = 0; i != count(); ++i) {
1376 if (GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i)))
1377 wa->setFullScreen(full_screen);
1380 if (lyxrc.full_screen_tabbar)
1381 showBar(!full_screen && count() > 1);
1385 void TabWorkArea::showBar(bool show)
1387 tabBar()->setEnabled(show);
1388 tabBar()->setVisible(show);
1389 #if QT_VERSION < 0x040500
1390 closeBufferButton->setVisible(show);
1395 GuiWorkArea * TabWorkArea::currentWorkArea()
1400 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(currentWidget());
1406 GuiWorkArea * TabWorkArea::workArea(Buffer & buffer)
1408 for (int i = 0; i != count(); ++i) {
1409 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i));
1410 LASSERT(wa, return 0);
1411 if (&wa->bufferView().buffer() == &buffer)
1418 void TabWorkArea::closeAll()
1421 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(0));
1429 bool TabWorkArea::setCurrentWorkArea(GuiWorkArea * work_area)
1431 LASSERT(work_area, /**/);
1432 int index = indexOf(work_area);
1436 if (index == currentIndex())
1437 // Make sure the work area is up to date.
1438 on_currentTabChanged(index);
1440 // Switch to the work area.
1441 setCurrentIndex(index);
1442 work_area->setFocus();
1448 GuiWorkArea * TabWorkArea::addWorkArea(Buffer & buffer, GuiView & view)
1450 GuiWorkArea * wa = new GuiWorkArea(buffer, view);
1451 wa->setUpdatesEnabled(false);
1452 // Hide tabbar if there's no tab (avoid a resize and a flashing tabbar
1453 // when hiding it again below).
1454 if (!(currentWorkArea() && currentWorkArea()->isFullScreen()))
1455 showBar(count() > 0);
1456 addTab(wa, wa->windowTitle());
1457 QObject::connect(wa, SIGNAL(titleChanged(GuiWorkArea *)),
1458 this, SLOT(updateTabTexts()));
1459 if (currentWorkArea() && currentWorkArea()->isFullScreen())
1460 setFullScreen(true);
1462 // Hide tabbar if there's only one tab.
1463 showBar(count() > 1);
1471 bool TabWorkArea::removeWorkArea(GuiWorkArea * work_area)
1473 LASSERT(work_area, return false);
1474 int index = indexOf(work_area);
1478 work_area->setUpdatesEnabled(false);
1483 // make sure the next work area is enabled.
1484 currentWidget()->setUpdatesEnabled(true);
1485 if (currentWorkArea() && currentWorkArea()->isFullScreen())
1486 setFullScreen(true);
1488 // Show tabbar only if there's more than one tab.
1489 showBar(count() > 1);
1491 lastWorkAreaRemoved();
1499 void TabWorkArea::on_currentTabChanged(int i)
1501 // returns e.g. on application destruction
1504 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i));
1505 LASSERT(wa, return);
1506 BufferView & bv = wa->bufferView();
1507 bv.cursor().fixIfBroken();
1509 wa->setUpdatesEnabled(true);
1513 currentWorkAreaChanged(wa);
1515 LYXERR(Debug::GUI, "currentTabChanged " << i
1516 << "File" << bv.buffer().absFileName());
1520 void TabWorkArea::closeCurrentBuffer()
1522 if (clicked_tab_ != -1)
1523 setCurrentIndex(clicked_tab_);
1525 // Before dispatching the LFUN we should be sure this
1526 // is the current workarea.
1527 currentWorkAreaChanged(currentWorkArea());
1529 lyx::dispatch(FuncRequest(LFUN_BUFFER_CLOSE));
1533 void TabWorkArea::closeCurrentTab()
1536 if (clicked_tab_ == -1)
1537 wa = currentWorkArea();
1539 wa = dynamic_cast<GuiWorkArea *>(widget(clicked_tab_));
1542 wa->view().hideWorkArea(wa);
1548 /// make vector happy
1551 DisplayPath(int tab, FileName const & filename)
1554 filename_ = (filename.extension() == "lyx") ?
1555 toqstr(filename.onlyFileNameWithoutExt())
1556 : toqstr(filename.onlyFileName());
1557 postfix_ = toqstr(filename.absoluteFilePath()).
1558 split("/", QString::SkipEmptyParts);
1559 postfix_.pop_back();
1560 abs_ = toqstr(filename.absoluteFilePath());
1561 dottedPrefix_ = false;
1564 /// Absolute path for debugging.
1569 /// Add the first segment from the postfix or three dots to the prefix.
1570 /// Merge multiple dot tripples. In fact dots are added lazily, i.e. only
1571 /// when really needed.
1572 void shiftPathSegment(bool dotted)
1574 if (postfix_.count() <= 0)
1578 if (dottedPrefix_ && !prefix_.isEmpty())
1580 prefix_ += postfix_.front() + "/";
1582 dottedPrefix_ = dotted && !prefix_.isEmpty();
1583 postfix_.pop_front();
1586 QString displayString() const
1588 if (prefix_.isEmpty())
1591 bool dots = dottedPrefix_ || !postfix_.isEmpty();
1592 return prefix_ + (dots ? ".../" : "") + filename_;
1595 QString forecastPathString() const
1597 if (postfix_.count() == 0)
1598 return displayString();
1601 + (dottedPrefix_ ? ".../" : "")
1602 + postfix_.front() + "/";
1605 bool final() const { return postfix_.empty(); }
1607 int tab() const { return tab_; }
1613 QStringList postfix_;
1626 bool operator<(DisplayPath const & a, DisplayPath const & b)
1628 return a.displayString() < b.displayString();
1632 bool operator==(DisplayPath const & a, DisplayPath const & b)
1634 return a.displayString() == b.displayString();
1638 void TabWorkArea::updateTabTexts()
1643 std::list<DisplayPath> paths;
1644 typedef std::list<DisplayPath>::iterator It;
1646 // collect full names first: path into postfix, empty prefix and
1647 // filename without extension
1648 for (size_t i = 0; i < n; ++i) {
1649 GuiWorkArea * i_wa = dynamic_cast<GuiWorkArea *>(widget(i));
1650 FileName const fn = i_wa->bufferView().buffer().fileName();
1651 paths.push_back(DisplayPath(i, fn));
1654 // go through path segments and see if it helps to make the path more unique
1655 bool somethingChanged = true;
1656 bool allFinal = false;
1657 while (somethingChanged && !allFinal) {
1658 // adding path segments changes order
1661 LYXERR(Debug::GUI, "updateTabTexts() iteration start");
1662 somethingChanged = false;
1665 // find segments which are not unique (i.e. non-atomic)
1666 It it = paths.begin();
1668 QString segString = it->displayString();
1669 for (; it != paths.end(); ++it) {
1670 // look to the next item
1675 allFinal = allFinal && it->final();
1677 LYXERR(Debug::GUI, "it = " << it->abs()
1678 << " => " << it->displayString());
1680 // still the same segment?
1682 if ((next != paths.end()
1683 && (nextString = next->displayString()) == segString))
1685 LYXERR(Debug::GUI, "segment ended");
1687 // only a trivial one with one element?
1688 if (it == segStart) {
1689 // start new segment
1691 segString = nextString;
1695 // we found a non-atomic segment segStart <= sit <= it < next.
1696 // Shift path segments and hope for the best
1697 // that it makes the path more unique.
1698 somethingChanged = true;
1700 QString dspString = sit->forecastPathString();
1701 LYXERR(Debug::GUI, "first forecast found for "
1702 << sit->abs() << " => " << dspString);
1704 bool moreUnique = false;
1705 for (; sit != next; ++sit) {
1706 if (sit->forecastPathString() != dspString) {
1707 LYXERR(Debug::GUI, "different forecast found for "
1708 << sit->abs() << " => " << sit->forecastPathString());
1712 LYXERR(Debug::GUI, "same forecast found for "
1713 << sit->abs() << " => " << dspString);
1716 // if the path segment helped, add it. Otherwise add dots
1717 bool dots = !moreUnique;
1718 LYXERR(Debug::GUI, "using dots = " << dots);
1719 for (sit = segStart; sit != next; ++sit) {
1720 sit->shiftPathSegment(dots);
1721 LYXERR(Debug::GUI, "shifting "
1722 << sit->abs() << " => " << sit->displayString());
1725 // start new segment
1727 segString = nextString;
1731 // set new tab titles
1732 for (It it = paths.begin(); it != paths.end(); ++it) {
1733 GuiWorkArea * i_wa = dynamic_cast<GuiWorkArea *>(widget(it->tab()));
1734 Buffer & buf = i_wa->bufferView().buffer();
1735 if (!buf.fileName().empty() && !buf.isClean())
1736 setTabText(it->tab(), it->displayString() + "*");
1738 setTabText(it->tab(), it->displayString());
1743 void TabWorkArea::showContextMenu(const QPoint & pos)
1746 clicked_tab_ = static_cast<DragTabBar *>(tabBar())->tabAt(pos);
1747 if (clicked_tab_ == -1)
1752 popup.addAction(QIcon(getPixmap("images/", "hidetab", "png")),
1753 qt_("Hide tab"), this, SLOT(closeCurrentTab()));
1754 popup.addAction(QIcon(getPixmap("images/", "closetab", "png")),
1755 qt_("Close tab"), this, SLOT(closeCurrentBuffer()));
1756 popup.exec(tabBar()->mapToGlobal(pos));
1762 void TabWorkArea::moveTab(int fromIndex, int toIndex)
1764 QWidget * w = widget(fromIndex);
1765 QIcon icon = tabIcon(fromIndex);
1766 QString text = tabText(fromIndex);
1768 setCurrentIndex(fromIndex);
1769 removeTab(fromIndex);
1770 insertTab(toIndex, w, icon, text);
1771 setCurrentIndex(toIndex);
1775 DragTabBar::DragTabBar(QWidget* parent)
1778 setAcceptDrops(true);
1779 #if QT_VERSION >= 0x040500
1780 setTabsClosable(true);
1785 void DragTabBar::on_tabCloseRequested(int index)
1787 setCurrentIndex(index);
1788 lyx::dispatch(FuncRequest(LFUN_BUFFER_CLOSE));
1792 #if QT_VERSION < 0x040300
1793 int DragTabBar::tabAt(QPoint const & position) const
1795 const int max = count();
1796 for (int i = 0; i < max; ++i) {
1797 if (tabRect(i).contains(position))
1805 void DragTabBar::mousePressEvent(QMouseEvent * event)
1807 if (event->button() == Qt::LeftButton)
1808 dragStartPos_ = event->pos();
1809 QTabBar::mousePressEvent(event);
1813 void DragTabBar::mouseMoveEvent(QMouseEvent * event)
1815 // If the left button isn't pressed anymore then return
1816 if (!(event->buttons() & Qt::LeftButton))
1819 // If the distance is too small then return
1820 if ((event->pos() - dragStartPos_).manhattanLength()
1821 < QApplication::startDragDistance())
1824 // did we hit something after all?
1825 int tab = tabAt(dragStartPos_);
1829 // simulate button release to remove highlight from button
1830 int i = currentIndex();
1831 QMouseEvent me(QEvent::MouseButtonRelease, dragStartPos_,
1832 event->button(), event->buttons(), 0);
1833 QTabBar::mouseReleaseEvent(&me);
1837 QDrag * drag = new QDrag(this);
1838 QMimeData * mimeData = new QMimeData;
1839 // a crude way to distinguish tab-reodering drops from other ones
1840 mimeData->setData("action", "tab-reordering") ;
1841 drag->setMimeData(mimeData);
1843 #if QT_VERSION >= 0x040300
1844 // get tab pixmap as cursor
1845 QRect r = tabRect(tab);
1846 QPixmap pixmap(r.size());
1847 render(&pixmap, - r.topLeft());
1848 drag->setPixmap(pixmap);
1851 drag->start(Qt::MoveAction);
1857 void DragTabBar::dragEnterEvent(QDragEnterEvent * event)
1859 // Only accept if it's an tab-reordering request
1860 QMimeData const * m = event->mimeData();
1861 QStringList formats = m->formats();
1862 if (formats.contains("action")
1863 && m->data("action") == "tab-reordering")
1864 event->acceptProposedAction();
1868 void DragTabBar::dropEvent(QDropEvent * event)
1870 int fromIndex = tabAt(dragStartPos_);
1871 int toIndex = tabAt(event->pos());
1873 // Tell interested objects that
1874 if (fromIndex != toIndex)
1875 tabMoveRequested(fromIndex, toIndex);
1876 event->acceptProposedAction();
1880 } // namespace frontend
1883 #include "moc_GuiWorkArea.cpp"