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)),
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();
458 guiApp->processKeySym(key, mod);
462 void GuiWorkArea::dispatch(FuncRequest const & cmd0, KeyModifier mod)
465 if (cmd0.action == LFUN_FILE_OPEN) {
466 lyx_view_->dispatch(cmd0);
472 if (cmd0.action == LFUN_MOUSE_PRESS) {
473 if (mod == ShiftModifier)
474 cmd = FuncRequest(cmd0, "region-select");
475 else if (mod == ControlModifier)
476 cmd = FuncRequest(cmd0, "paragraph-select");
483 bool const notJustMovingTheMouse =
484 cmd.action != LFUN_MOUSE_MOTION || cmd.button() != mouse_button::none;
486 // In order to avoid bad surprise in the middle of an operation, we better stop
487 // the blinking cursor.
488 if (notJustMovingTheMouse)
489 stopBlinkingCursor();
491 buffer_view_->mouseEventDispatch(cmd);
493 // Skip these when selecting
494 if (cmd.action != LFUN_MOUSE_MOTION) {
495 completer_->updateVisibility(false, false);
496 lyx_view_->updateDialogs();
497 lyx_view_->updateStatusBar();
500 // GUI tweaks except with mouse motion with no button pressed.
501 if (notJustMovingTheMouse) {
502 // Slight hack: this is only called currently when we
503 // clicked somewhere, so we force through the display
504 // of the new status here.
505 lyx_view_->clearMessage();
507 // Show the cursor immediately after any operation
508 startBlinkingCursor();
513 void GuiWorkArea::resizeBufferView()
515 // WARNING: Please don't put any code that will trigger a repaint here!
516 // We are already inside a paint event.
517 lyx_view_->setBusy(true);
520 buffer_view_->cursorPosAndHeight(p, h);
521 bool const cursor_in_view = buffer_view_->cursorInView(p, h);
522 buffer_view_->resize(viewport()->width(), viewport()->height());
524 buffer_view_->scrollToCursor();
527 // Update scrollbars which might have changed due different
528 // BufferView dimension. This is especially important when the
529 // BufferView goes from zero-size to the real-size for the first time,
530 // as the scrollbar paramters are then set for the first time.
533 lyx_view_->updateLayoutList();
534 lyx_view_->setBusy(false);
535 need_resize_ = false;
539 void GuiWorkArea::showCursor()
545 bool l_shape = false;
546 Font const & realfont = buffer_view_->cursor().real_current_font;
547 BufferParams const & bp = buffer_view_->buffer().params();
548 bool const samelang = realfont.language() == bp.language;
549 bool const isrtl = realfont.isVisibleRightToLeft();
551 if (!samelang || isrtl != bp.language->rightToLeft())
554 // The ERT language hack needs fixing up
555 if (realfont.language() == latex_language)
560 buffer_view_->cursorPosAndHeight(p, h);
561 // show cursor on screen
562 Cursor & cur = buffer_view_->cursor();
563 bool completable = cur.inset().showCompletionCursor()
564 && completer_->completionAvailable()
565 && !completer_->popupVisible()
566 && !completer_->inlineVisible();
567 if (buffer_view_->cursorInView(p, h)) {
568 cursor_visible_ = true;
569 showCursor(p.x_, p.y_, h, l_shape, isrtl, completable);
574 void GuiWorkArea::hideCursor()
576 if (!cursor_visible_)
579 cursor_visible_ = false;
584 void GuiWorkArea::toggleCursor()
593 void GuiWorkArea::updateScrollbar()
595 ScrollbarParameters const & scroll_ = buffer_view_->scrollbarParameters();
596 // WARNING: don't touch at the scrollbar value like this:
597 // verticalScrollBar()->setValue(scroll_.position);
598 // because this would cause a recursive signal/slot calling with
599 // GuiWorkArea::scrollTo
600 verticalScrollBar()->setRange(scroll_.min, scroll_.max);
601 verticalScrollBar()->setPageStep(scroll_.page_step);
602 verticalScrollBar()->setSingleStep(scroll_.single_step);
603 verticalScrollBar()->setSliderPosition(scroll_.position);
607 void GuiWorkArea::scrollTo(int value)
609 stopBlinkingCursor();
610 buffer_view_->scrollDocView(value);
612 if (lyxrc.cursor_follows_scrollbar) {
613 buffer_view_->setCursorFromScrollbar();
614 lyx_view_->updateLayoutList();
616 // Show the cursor immediately after any operation.
617 startBlinkingCursor();
618 QApplication::syncX();
622 bool GuiWorkArea::event(QEvent * e)
625 case QEvent::ToolTip: {
626 QHelpEvent * helpEvent = static_cast<QHelpEvent *>(e);
627 if (lyxrc.use_tooltip) {
628 QPoint pos = helpEvent->pos();
629 if (pos.x() < viewport()->width()) {
630 QString s = toqstr(buffer_view_->toolTip(pos.x(), pos.y()));
631 QToolTip::showText(helpEvent->globalPos(), s);
634 QToolTip::hideText();
636 // Don't forget to accept the event!
641 case QEvent::ShortcutOverride: {
642 // We catch this event in order to catch the Tab or Shift+Tab key press
643 // which are otherwise reserved to focus switching between controls
645 QKeyEvent * ke = static_cast<QKeyEvent*>(e);
646 if ((ke->key() != Qt::Key_Tab && ke->key() != Qt::Key_Backtab)
647 || ke->modifiers() & Qt::ControlModifier)
648 return QAbstractScrollArea::event(e);
654 return QAbstractScrollArea::event(e);
660 void GuiWorkArea::contextMenuEvent(QContextMenuEvent * e)
663 if (e->reason() == QContextMenuEvent::Mouse)
664 // the position is set on mouse press
665 pos = context_target_pos_;
668 Cursor const & cur = buffer_view_->cursor();
669 if (e->reason() == QContextMenuEvent::Keyboard && cur.inTexted()) {
670 // Do not access the context menu of math right in front of before
671 // the cursor. This does not work when the cursor is in text.
672 Inset * inset = cur.paragraph().getInset(cur.pos());
673 if (inset && inset->asInsetMath())
675 else if (cur.pos() > 0) {
676 Inset * inset = cur.paragraph().getInset(cur.pos() - 1);
681 docstring name = buffer_view_->contextMenu(pos.x(), pos.y());
683 QAbstractScrollArea::contextMenuEvent(e);
686 QMenu * menu = guiApp->menus().menu(toqstr(name), *lyx_view_);
688 QAbstractScrollArea::contextMenuEvent(e);
691 // Position the menu to the right.
692 // FIXME: menu position should be different for RTL text.
693 menu->exec(e->globalPos());
698 void GuiWorkArea::focusInEvent(QFocusEvent * e)
701 LYXERR(Debug::DEBUG, "GuiWorkArea::focusInEvent(): " << this << std::endl);
702 GuiWorkArea * old_gwa = theGuiApp()->currentView()->currentWorkArea();
704 old_gwa->stopBlinkingCursor();
705 lyx_view_->setCurrentWorkArea(this);
708 if (lyx_view_->currentWorkArea() != this)
709 lyx_view_->setCurrentWorkArea(this);
711 startBlinkingCursor();
712 QAbstractScrollArea::focusInEvent(e);
716 void GuiWorkArea::focusOutEvent(QFocusEvent * e)
718 LYXERR(Debug::DEBUG, "GuiWorkArea::focusOutEvent(): " << this << std::endl);
719 stopBlinkingCursor();
720 QAbstractScrollArea::focusOutEvent(e);
724 void GuiWorkArea::mousePressEvent(QMouseEvent * e)
726 if (dc_event_.active && dc_event_ == *e) {
727 dc_event_.active = false;
728 FuncRequest cmd(LFUN_MOUSE_TRIPLE, e->x(), e->y(),
729 q_button_state(e->button()));
735 if (e->button() == Qt::RightButton)
736 context_target_pos_ = e->pos();
738 inputContext()->reset();
740 FuncRequest const cmd(LFUN_MOUSE_PRESS, e->x(), e->y(),
741 q_button_state(e->button()));
742 dispatch(cmd, q_key_state(e->modifiers()));
747 void GuiWorkArea::mouseReleaseEvent(QMouseEvent * e)
749 if (synthetic_mouse_event_.timeout.running())
750 synthetic_mouse_event_.timeout.stop();
752 FuncRequest const cmd(LFUN_MOUSE_RELEASE, e->x(), e->y(),
753 q_button_state(e->button()));
759 void GuiWorkArea::mouseMoveEvent(QMouseEvent * e)
761 // we kill the triple click if we move
762 doubleClickTimeout();
763 FuncRequest cmd(LFUN_MOUSE_MOTION, e->x(), e->y(),
764 q_motion_state(e->buttons()));
768 // If we're above or below the work area...
769 if (e->y() <= 20 || e->y() >= viewport()->height() - 20) {
770 // Make sure only a synthetic event can cause a page scroll,
771 // so they come at a steady rate:
773 // _Force_ a scroll up:
776 cmd.y = viewport()->height();
777 // Store the event, to be handled when the timeout expires.
778 synthetic_mouse_event_.cmd = cmd;
780 if (synthetic_mouse_event_.timeout.running())
781 // Discard the event. Note that it _may_ be handled
782 // when the timeout expires if
783 // synthetic_mouse_event_.cmd has not been overwritten.
784 // Ie, when the timeout expires, we handle the
785 // most recent event but discard all others that
786 // occurred after the one used to start the timeout
787 // in the first place.
790 synthetic_mouse_event_.restart_timeout = true;
791 synthetic_mouse_event_.timeout.start();
792 // Fall through to handle this event...
794 } else if (synthetic_mouse_event_.timeout.running()) {
795 // Store the event, to be possibly handled when the timeout
797 // Once the timeout has expired, normal control is returned
798 // to mouseMoveEvent (restart_timeout = false).
799 // This results in a much smoother 'feel' when moving the
800 // mouse back into the work area.
801 synthetic_mouse_event_.cmd = cmd;
802 synthetic_mouse_event_.restart_timeout = false;
806 // Has anything changed on-screen since the last QMouseEvent
808 if (e->x() == synthetic_mouse_event_.x_old
809 && e->y() == synthetic_mouse_event_.y_old
810 && synthetic_mouse_event_.min_scrollbar_old == verticalScrollBar()->minimum()
811 && synthetic_mouse_event_.max_scrollbar_old == verticalScrollBar()->maximum()) {
812 // Nothing changed on-screen since the last QMouseEvent.
816 // Yes something has changed. Store the params used to check this.
817 synthetic_mouse_event_.x_old = e->x();
818 synthetic_mouse_event_.y_old = e->y();
819 synthetic_mouse_event_.min_scrollbar_old = verticalScrollBar()->minimum();
820 synthetic_mouse_event_.max_scrollbar_old = verticalScrollBar()->maximum();
822 // ... and dispatch the event to the LyX core.
827 void GuiWorkArea::wheelEvent(QWheelEvent * ev)
829 // Wheel rotation by one notch results in a delta() of 120 (see
830 // documentation of QWheelEvent)
831 int const delta = ev->delta() / 120;
832 if (ev->modifiers() & Qt::ControlModifier) {
833 docstring arg = convert<docstring>(5 * delta);
834 lyx::dispatch(FuncRequest(LFUN_BUFFER_ZOOM_IN, arg));
838 // Take into account the desktop wide settings.
839 int const lines = qApp->wheelScrollLines();
840 int const page_step = verticalScrollBar()->pageStep();
841 // Test if the wheel mouse is set to one screen at a time.
842 int scroll_value = lines > page_step
843 ? page_step : lines * verticalScrollBar()->singleStep();
845 // Take into account the rotation.
846 scroll_value *= delta;
848 // Take into account user preference.
849 scroll_value *= lyxrc.mouse_wheel_speed;
850 LYXERR(Debug::SCROLLING, "wheelScrollLines = " << lines
851 << " delta = " << delta << " scroll_value = " << scroll_value
852 << " page_step = " << page_step);
854 verticalScrollBar()->setValue(verticalScrollBar()->value() - scroll_value);
860 void GuiWorkArea::generateSyntheticMouseEvent()
862 // Set things off to generate the _next_ 'pseudo' event.
863 if (synthetic_mouse_event_.restart_timeout)
864 synthetic_mouse_event_.timeout.start();
866 // Has anything changed on-screen since the last timeout signal
868 int const min_scrollbar = verticalScrollBar()->minimum();
869 int const max_scrollbar = verticalScrollBar()->maximum();
870 if (min_scrollbar == synthetic_mouse_event_.min_scrollbar_old
871 && max_scrollbar == synthetic_mouse_event_.max_scrollbar_old) {
874 // Yes it has. Store the params used to check this.
875 synthetic_mouse_event_.min_scrollbar_old = min_scrollbar;
876 synthetic_mouse_event_.max_scrollbar_old = max_scrollbar;
877 // ... and dispatch the event to the LyX core.
878 dispatch(synthetic_mouse_event_.cmd);
882 void GuiWorkArea::keyPressEvent(QKeyEvent * ev)
884 // Do not process here some keys if dialog_mode_ is set
886 && (ev->modifiers() == Qt::NoModifier
887 || ev->modifiers() == Qt::ShiftModifier)
888 && (ev->key() == Qt::Key_Escape
889 || ev->key() == Qt::Key_Enter
890 || ev->key() == Qt::Key_Return)
896 // intercept some keys if completion popup is visible
897 if (completer_->popupVisible()) {
901 completer_->activate();
907 // do nothing if there are other events
908 // (the auto repeated events come too fast)
909 // \todo FIXME: remove hard coded Qt keys, process the key binding
911 if (XEventsQueued(QX11Info::display(), 0) > 1 && ev->isAutoRepeat()
912 && (Qt::Key_PageDown || Qt::Key_PageUp)) {
913 LYXERR(Debug::KEY, "system is busy: scroll key event ignored");
919 LYXERR(Debug::KEY, " count: " << ev->count() << " text: " << ev->text()
920 << " isAutoRepeat: " << ev->isAutoRepeat() << " key: " << ev->key());
923 setKeySymbol(&sym, ev);
925 processKeySym(sym, q_key_state(ev->modifiers()));
933 void GuiWorkArea::doubleClickTimeout()
935 dc_event_.active = false;
939 void GuiWorkArea::mouseDoubleClickEvent(QMouseEvent * ev)
941 dc_event_ = DoubleClick(ev);
942 QTimer::singleShot(QApplication::doubleClickInterval(), this,
943 SLOT(doubleClickTimeout()));
944 FuncRequest cmd(LFUN_MOUSE_DOUBLE,
946 q_button_state(ev->button()));
952 void GuiWorkArea::resizeEvent(QResizeEvent * ev)
954 QAbstractScrollArea::resizeEvent(ev);
960 void GuiWorkArea::update(int x, int y, int w, int h)
962 viewport()->repaint(x, y, w, h);
966 void GuiWorkArea::paintEvent(QPaintEvent * ev)
968 QRect const rc = ev->rect();
969 // LYXERR(Debug::PAINTING, "paintEvent begin: x: " << rc.x()
970 // << " y: " << rc.y() << " w: " << rc.width() << " h: " << rc.height());
973 screen_ = QPixmap(viewport()->width(), viewport()->height());
979 QPainter pain(viewport());
980 pain.drawPixmap(rc, screen_, rc);
986 void GuiWorkArea::updateScreen()
988 GuiPainter pain(&screen_);
989 buffer_view_->draw(pain);
993 void GuiWorkArea::showCursor(int x, int y, int h,
994 bool l_shape, bool rtl, bool completable)
996 if (schedule_redraw_) {
997 // This happens when a graphic conversion is finished. As we don't know
998 // the size of the new graphics, it's better the update everything.
999 // We can't use redraw() here because this would trigger a infinite
1000 // recursive loop with showCursor().
1001 buffer_view_->resize(viewport()->width(), viewport()->height());
1004 viewport()->update(QRect(0, 0, viewport()->width(), viewport()->height()));
1005 schedule_redraw_ = false;
1006 // Show the cursor immediately after the update.
1012 cursor_->update(x, y, h, l_shape, rtl, completable);
1014 viewport()->update(cursor_->rect());
1018 void GuiWorkArea::removeCursor()
1021 //if (!qApp->focusWidget())
1022 viewport()->update(cursor_->rect());
1026 void GuiWorkArea::inputMethodEvent(QInputMethodEvent * e)
1028 QString const & commit_string = e->commitString();
1029 docstring const & preedit_string
1030 = qstring_to_ucs4(e->preeditString());
1032 if (!commit_string.isEmpty()) {
1034 LYXERR(Debug::KEY, "preeditString: " << e->preeditString()
1035 << " commitString: " << e->commitString());
1039 // FIXME Iwami 04/01/07: we should take care also of UTF16 surrogates here.
1040 for (int i = 0; i != commit_string.size(); ++i) {
1041 QKeyEvent ev(QEvent::KeyPress, key, Qt::NoModifier, commit_string[i]);
1046 // Hide the cursor during the kana-kanji transformation.
1047 if (preedit_string.empty())
1048 startBlinkingCursor();
1050 stopBlinkingCursor();
1052 // last_width : for checking if last preedit string was/wasn't empty.
1053 static bool last_width = false;
1054 if (!last_width && preedit_string.empty()) {
1055 // if last_width is last length of preedit string.
1060 GuiPainter pain(&screen_);
1061 buffer_view_->updateMetrics();
1062 buffer_view_->draw(pain);
1063 FontInfo font = buffer_view_->cursor().getFont().fontInfo();
1064 FontMetrics const & fm = theFontMetrics(font);
1065 int height = fm.maxHeight();
1066 int cur_x = cursor_->rect().left();
1067 int cur_y = cursor_->rect().bottom();
1069 // redraw area of preedit string.
1070 update(0, cur_y - height, viewport()->width(),
1071 (height + 1) * preedit_lines_);
1073 if (preedit_string.empty()) {
1081 // att : stores an IM attribute.
1082 QList<QInputMethodEvent::Attribute> const & att = e->attributes();
1084 // get attributes of input method cursor.
1085 // cursor_pos : cursor position in preedit string.
1086 size_t cursor_pos = 0;
1087 bool cursor_is_visible = false;
1088 for (int i = 0; i != att.size(); ++i) {
1089 if (att.at(i).type == QInputMethodEvent::Cursor) {
1090 cursor_pos = att.at(i).start;
1091 cursor_is_visible = att.at(i).length != 0;
1096 size_t preedit_length = preedit_string.length();
1098 // get position of selection in input method.
1099 // FIXME: isn't there a way to do this simplier?
1100 // rStart : cursor position in selected string in IM.
1102 // rLength : selected string length in IM.
1104 if (cursor_pos < preedit_length) {
1105 for (int i = 0; i != att.size(); ++i) {
1106 if (att.at(i).type == QInputMethodEvent::TextFormat) {
1107 if (att.at(i).start <= int(cursor_pos)
1108 && int(cursor_pos) < att.at(i).start + att.at(i).length) {
1109 rStart = att.at(i).start;
1110 rLength = att.at(i).length;
1111 if (!cursor_is_visible)
1112 cursor_pos += rLength;
1119 rStart = cursor_pos;
1123 int const right_margin = buffer_view_->rightMargin();
1124 Painter::preedit_style ps;
1125 // Most often there would be only one line:
1127 for (size_t pos = 0; pos != preedit_length; ++pos) {
1128 char_type const typed_char = preedit_string[pos];
1129 // reset preedit string style
1130 ps = Painter::preedit_default;
1132 // if we reached the right extremity of the screen, go to next line.
1133 if (cur_x + fm.width(typed_char) > viewport()->width() - right_margin) {
1134 cur_x = right_margin;
1135 cur_y += height + 1;
1138 // preedit strings are displayed with dashed underline
1139 // and partial strings are displayed white on black indicating
1140 // that we are in selecting mode in the input method.
1141 // FIXME: rLength == preedit_length is not a changing condition
1142 // FIXME: should be put out of the loop.
1144 && pos < rStart + rLength
1145 && !(cursor_pos < rLength && rLength == preedit_length))
1146 ps = Painter::preedit_selecting;
1148 if (pos == cursor_pos
1149 && (cursor_pos < rLength && rLength == preedit_length))
1150 ps = Painter::preedit_cursor;
1152 // draw one character and update cur_x.
1153 cur_x += pain.preeditText(cur_x, cur_y, typed_char, font, ps);
1156 // update the preedit string screen area.
1157 update(0, cur_y - preedit_lines_*height, viewport()->width(),
1158 (height + 1) * preedit_lines_);
1160 // Don't forget to accept the event!
1165 QVariant GuiWorkArea::inputMethodQuery(Qt::InputMethodQuery query) const
1167 QRect cur_r(0, 0, 0, 0);
1169 // this is the CJK-specific composition window position and
1170 // the context menu position when the menu key is pressed.
1171 case Qt::ImMicroFocus:
1172 cur_r = cursor_->rect();
1173 if (preedit_lines_ != 1)
1175 cur_r.moveBottom(cur_r.bottom()
1176 + cur_r.height() * (preedit_lines_ - 1));
1177 // return lower right of cursor in LyX.
1180 return QWidget::inputMethodQuery(query);
1185 void GuiWorkArea::updateWindowTitle()
1187 docstring maximize_title;
1188 docstring minimize_title;
1190 Buffer & buf = buffer_view_->buffer();
1191 FileName const fileName = buf.fileName();
1192 if (!fileName.empty()) {
1193 maximize_title = fileName.displayName(30);
1194 minimize_title = from_utf8(fileName.onlyFileName());
1195 if (buf.lyxvc().inUse()) {
1196 if (buf.lyxvc().locker().empty())
1197 maximize_title += _(" (version control)");
1199 maximize_title += _(" (version control, locking)");
1201 if (!buf.isClean()) {
1202 maximize_title += _(" (changed)");
1203 minimize_title += char_type('*');
1205 if (buf.isReadonly())
1206 maximize_title += _(" (read only)");
1209 QString title = windowTitle();
1210 QString new_title = toqstr(maximize_title);
1211 if (title == new_title)
1214 QWidget::setWindowTitle(new_title);
1215 QWidget::setWindowIconText(toqstr(minimize_title));
1220 void GuiWorkArea::setReadOnly(bool)
1222 updateWindowTitle();
1223 if (this == lyx_view_->currentWorkArea())
1224 lyx_view_->updateDialogs();
1228 bool GuiWorkArea::isFullScreen()
1230 return lyx_view_ && lyx_view_->isFullScreen();
1234 ////////////////////////////////////////////////////////////////////
1238 ////////////////////////////////////////////////////////////////////
1241 EmbeddedWorkArea::EmbeddedWorkArea(QWidget * w): GuiWorkArea(w)
1243 buffer_ = theBufferList().newBuffer(
1244 support::FileName::tempName().absFilename() + "_embedded.internal");
1245 buffer_->setUnnamed(true);
1246 buffer_->setFullyLoaded(true);
1247 setBuffer(*buffer_);
1248 setDialogMode(true);
1252 EmbeddedWorkArea::~EmbeddedWorkArea()
1254 // No need to destroy buffer and bufferview here, because it is done
1255 // in theBuffeerList() destruction loop at application exit
1259 void EmbeddedWorkArea::closeEvent(QCloseEvent * ev)
1262 GuiWorkArea::closeEvent(ev);
1266 void EmbeddedWorkArea::hideEvent(QHideEvent * ev)
1269 GuiWorkArea::hideEvent(ev);
1273 void EmbeddedWorkArea::disable()
1275 stopBlinkingCursor();
1276 if (view().currentWorkArea() != this)
1278 LASSERT(view().currentMainWorkArea(), /* */);
1279 view().setCurrentWorkArea(view().currentMainWorkArea());
1282 ////////////////////////////////////////////////////////////////////
1286 ////////////////////////////////////////////////////////////////////
1289 class NoTabFrameMacStyle : public QMacStyle {
1292 QRect subElementRect(SubElement element, const QStyleOption * option,
1293 const QWidget * widget = 0) const
1295 QRect rect = QMacStyle::subElementRect(element, option, widget);
1296 bool noBar = static_cast<QTabWidget const *>(widget)->count() <= 1;
1298 // The Qt Mac style puts the contents into a 3 pixel wide box
1299 // which looks very ugly and not like other Mac applications.
1300 // Hence we remove this here, and moreover the 16 pixel round
1301 // frame above if the tab bar is hidden.
1302 if (element == QStyle::SE_TabWidgetTabContents) {
1303 rect.adjust(- rect.left(), 0, rect.left(), 0);
1312 NoTabFrameMacStyle noTabFrameMacStyle;
1316 TabWorkArea::TabWorkArea(QWidget * parent)
1317 : QTabWidget(parent), clicked_tab_(-1)
1320 setStyle(&noTabFrameMacStyle);
1322 #if QT_VERSION < 0x040500
1323 lyxrc.single_close_tab_button = true;
1326 QPalette pal = palette();
1327 pal.setColor(QPalette::Active, QPalette::Button,
1328 pal.color(QPalette::Active, QPalette::Window));
1329 pal.setColor(QPalette::Disabled, QPalette::Button,
1330 pal.color(QPalette::Disabled, QPalette::Window));
1331 pal.setColor(QPalette::Inactive, QPalette::Button,
1332 pal.color(QPalette::Inactive, QPalette::Window));
1334 QObject::connect(this, SIGNAL(currentChanged(int)),
1335 this, SLOT(on_currentTabChanged(int)));
1337 closeBufferButton = new QToolButton(this);
1338 closeBufferButton->setPalette(pal);
1339 // FIXME: rename the icon to closebuffer.png
1340 closeBufferButton->setIcon(QIcon(getPixmap("images/", "closetab", "png")));
1341 closeBufferButton->setText("Close File");
1342 closeBufferButton->setAutoRaise(true);
1343 closeBufferButton->setCursor(Qt::ArrowCursor);
1344 closeBufferButton->setToolTip(qt_("Close File"));
1345 closeBufferButton->setEnabled(true);
1346 QObject::connect(closeBufferButton, SIGNAL(clicked()),
1347 this, SLOT(closeCurrentBuffer()));
1348 setCornerWidget(closeBufferButton, Qt::TopRightCorner);
1350 // setup drag'n'drop
1351 QTabBar* tb = new DragTabBar;
1352 connect(tb, SIGNAL(tabMoveRequested(int, int)),
1353 this, SLOT(moveTab(int, int)));
1354 tb->setElideMode(Qt::ElideNone);
1357 // make us responsible for the context menu of the tabbar
1358 tb->setContextMenuPolicy(Qt::CustomContextMenu);
1359 connect(tb, SIGNAL(customContextMenuRequested(const QPoint &)),
1360 this, SLOT(showContextMenu(const QPoint &)));
1361 #if QT_VERSION >= 0x040500
1362 connect(tb, SIGNAL(tabCloseRequested(int)),
1363 tb, SLOT(on_tabCloseRequested(int)));
1366 setUsesScrollButtons(true);
1370 void TabWorkArea::setFullScreen(bool full_screen)
1372 for (int i = 0; i != count(); ++i) {
1373 if (GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i)))
1374 wa->setFullScreen(full_screen);
1377 if (lyxrc.full_screen_tabbar)
1378 showBar(!full_screen && count() > 1);
1382 void TabWorkArea::showBar(bool show)
1384 tabBar()->setEnabled(show);
1385 tabBar()->setVisible(show);
1386 closeBufferButton->setVisible(show && lyxrc.single_close_tab_button);
1387 #if QT_VERSION >= 0x040500
1388 setTabsClosable(!lyxrc.single_close_tab_button);
1393 GuiWorkArea * TabWorkArea::currentWorkArea()
1398 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(currentWidget());
1404 GuiWorkArea * TabWorkArea::workArea(Buffer & buffer)
1406 for (int i = 0; i != count(); ++i) {
1407 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i));
1408 LASSERT(wa, return 0);
1409 if (&wa->bufferView().buffer() == &buffer)
1416 void TabWorkArea::closeAll()
1419 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(0));
1427 bool TabWorkArea::setCurrentWorkArea(GuiWorkArea * work_area)
1429 LASSERT(work_area, /**/);
1430 int index = indexOf(work_area);
1434 if (index == currentIndex())
1435 // Make sure the work area is up to date.
1436 on_currentTabChanged(index);
1438 // Switch to the work area.
1439 setCurrentIndex(index);
1440 work_area->setFocus();
1446 GuiWorkArea * TabWorkArea::addWorkArea(Buffer & buffer, GuiView & view)
1448 GuiWorkArea * wa = new GuiWorkArea(buffer, view);
1449 wa->setUpdatesEnabled(false);
1450 // Hide tabbar if there's no tab (avoid a resize and a flashing tabbar
1451 // when hiding it again below).
1452 if (!(currentWorkArea() && currentWorkArea()->isFullScreen()))
1453 showBar(count() > 0);
1454 addTab(wa, wa->windowTitle());
1455 QObject::connect(wa, SIGNAL(titleChanged(GuiWorkArea *)),
1456 this, SLOT(updateTabTexts()));
1457 if (currentWorkArea() && currentWorkArea()->isFullScreen())
1458 setFullScreen(true);
1460 // Hide tabbar if there's only one tab.
1461 showBar(count() > 1);
1469 bool TabWorkArea::removeWorkArea(GuiWorkArea * work_area)
1471 LASSERT(work_area, return false);
1472 int index = indexOf(work_area);
1476 work_area->setUpdatesEnabled(false);
1481 // make sure the next work area is enabled.
1482 currentWidget()->setUpdatesEnabled(true);
1483 if (currentWorkArea() && currentWorkArea()->isFullScreen())
1484 setFullScreen(true);
1486 // Show tabbar only if there's more than one tab.
1487 showBar(count() > 1);
1489 lastWorkAreaRemoved();
1497 void TabWorkArea::on_currentTabChanged(int i)
1499 // returns e.g. on application destruction
1502 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i));
1503 LASSERT(wa, return);
1504 BufferView & bv = wa->bufferView();
1505 bv.cursor().fixIfBroken();
1507 wa->setUpdatesEnabled(true);
1511 currentWorkAreaChanged(wa);
1513 LYXERR(Debug::GUI, "currentTabChanged " << i
1514 << "File" << bv.buffer().absFileName());
1518 void TabWorkArea::closeCurrentBuffer()
1521 if (clicked_tab_ == -1)
1522 wa = currentWorkArea();
1524 wa = dynamic_cast<GuiWorkArea *>(widget(clicked_tab_));
1527 wa->view().closeWorkArea(wa);
1531 void TabWorkArea::closeCurrentTab()
1534 if (clicked_tab_ == -1)
1535 wa = currentWorkArea();
1537 wa = dynamic_cast<GuiWorkArea *>(widget(clicked_tab_));
1540 wa->view().hideWorkArea(wa);
1546 /// make vector happy
1549 DisplayPath(int tab, FileName const & filename)
1552 filename_ = (filename.extension() == "lyx") ?
1553 toqstr(filename.onlyFileNameWithoutExt())
1554 : toqstr(filename.onlyFileName());
1555 postfix_ = toqstr(filename.absoluteFilePath()).
1556 split("/", QString::SkipEmptyParts);
1557 postfix_.pop_back();
1558 abs_ = toqstr(filename.absoluteFilePath());
1559 dottedPrefix_ = false;
1562 /// Absolute path for debugging.
1567 /// Add the first segment from the postfix or three dots to the prefix.
1568 /// Merge multiple dot tripples. In fact dots are added lazily, i.e. only
1569 /// when really needed.
1570 void shiftPathSegment(bool dotted)
1572 if (postfix_.count() <= 0)
1576 if (dottedPrefix_ && !prefix_.isEmpty())
1578 prefix_ += postfix_.front() + "/";
1580 dottedPrefix_ = dotted && !prefix_.isEmpty();
1581 postfix_.pop_front();
1584 QString displayString() const
1586 if (prefix_.isEmpty())
1589 bool dots = dottedPrefix_ || !postfix_.isEmpty();
1590 return prefix_ + (dots ? ".../" : "") + filename_;
1593 QString forecastPathString() const
1595 if (postfix_.count() == 0)
1596 return displayString();
1599 + (dottedPrefix_ ? ".../" : "")
1600 + postfix_.front() + "/";
1603 bool final() const { return postfix_.empty(); }
1605 int tab() const { return tab_; }
1611 QStringList postfix_;
1624 bool operator<(DisplayPath const & a, DisplayPath const & b)
1626 return a.displayString() < b.displayString();
1630 bool operator==(DisplayPath const & a, DisplayPath const & b)
1632 return a.displayString() == b.displayString();
1636 void TabWorkArea::updateTabTexts()
1641 std::list<DisplayPath> paths;
1642 typedef std::list<DisplayPath>::iterator It;
1644 // collect full names first: path into postfix, empty prefix and
1645 // filename without extension
1646 for (size_t i = 0; i < n; ++i) {
1647 GuiWorkArea * i_wa = dynamic_cast<GuiWorkArea *>(widget(i));
1648 FileName const fn = i_wa->bufferView().buffer().fileName();
1649 paths.push_back(DisplayPath(i, fn));
1652 // go through path segments and see if it helps to make the path more unique
1653 bool somethingChanged = true;
1654 bool allFinal = false;
1655 while (somethingChanged && !allFinal) {
1656 // adding path segments changes order
1659 LYXERR(Debug::GUI, "updateTabTexts() iteration start");
1660 somethingChanged = false;
1663 // find segments which are not unique (i.e. non-atomic)
1664 It it = paths.begin();
1666 QString segString = it->displayString();
1667 for (; it != paths.end(); ++it) {
1668 // look to the next item
1673 allFinal = allFinal && it->final();
1675 LYXERR(Debug::GUI, "it = " << it->abs()
1676 << " => " << it->displayString());
1678 // still the same segment?
1680 if ((next != paths.end()
1681 && (nextString = next->displayString()) == segString))
1683 LYXERR(Debug::GUI, "segment ended");
1685 // only a trivial one with one element?
1686 if (it == segStart) {
1687 // start new segment
1689 segString = nextString;
1693 // we found a non-atomic segment segStart <= sit <= it < next.
1694 // Shift path segments and hope for the best
1695 // that it makes the path more unique.
1696 somethingChanged = true;
1698 QString dspString = sit->forecastPathString();
1699 LYXERR(Debug::GUI, "first forecast found for "
1700 << sit->abs() << " => " << dspString);
1702 bool moreUnique = false;
1703 for (; sit != next; ++sit) {
1704 if (sit->forecastPathString() != dspString) {
1705 LYXERR(Debug::GUI, "different forecast found for "
1706 << sit->abs() << " => " << sit->forecastPathString());
1710 LYXERR(Debug::GUI, "same forecast found for "
1711 << sit->abs() << " => " << dspString);
1714 // if the path segment helped, add it. Otherwise add dots
1715 bool dots = !moreUnique;
1716 LYXERR(Debug::GUI, "using dots = " << dots);
1717 for (sit = segStart; sit != next; ++sit) {
1718 sit->shiftPathSegment(dots);
1719 LYXERR(Debug::GUI, "shifting "
1720 << sit->abs() << " => " << sit->displayString());
1723 // start new segment
1725 segString = nextString;
1729 // set new tab titles
1730 for (It it = paths.begin(); it != paths.end(); ++it) {
1731 GuiWorkArea * i_wa = dynamic_cast<GuiWorkArea *>(widget(it->tab()));
1732 Buffer & buf = i_wa->bufferView().buffer();
1733 if (!buf.fileName().empty() && !buf.isClean())
1734 setTabText(it->tab(), it->displayString() + "*");
1736 setTabText(it->tab(), it->displayString());
1741 void TabWorkArea::showContextMenu(const QPoint & pos)
1744 clicked_tab_ = static_cast<DragTabBar *>(tabBar())->tabAt(pos);
1745 if (clicked_tab_ == -1)
1750 popup.addAction(QIcon(getPixmap("images/", "hidetab", "png")),
1751 qt_("Hide tab"), this, SLOT(closeCurrentTab()));
1752 popup.addAction(QIcon(getPixmap("images/", "closetab", "png")),
1753 qt_("Close tab"), this, SLOT(closeCurrentBuffer()));
1754 popup.exec(tabBar()->mapToGlobal(pos));
1760 void TabWorkArea::moveTab(int fromIndex, int toIndex)
1762 QWidget * w = widget(fromIndex);
1763 QIcon icon = tabIcon(fromIndex);
1764 QString text = tabText(fromIndex);
1766 setCurrentIndex(fromIndex);
1767 removeTab(fromIndex);
1768 insertTab(toIndex, w, icon, text);
1769 setCurrentIndex(toIndex);
1773 DragTabBar::DragTabBar(QWidget* parent)
1776 setAcceptDrops(true);
1777 #if QT_VERSION >= 0x040500
1778 setTabsClosable(!lyxrc.single_close_tab_button);
1783 void DragTabBar::on_tabCloseRequested(int index)
1785 setCurrentIndex(index);
1786 lyx::dispatch(FuncRequest(LFUN_BUFFER_CLOSE));
1790 #if QT_VERSION < 0x040300
1791 int DragTabBar::tabAt(QPoint const & position) const
1793 const int max = count();
1794 for (int i = 0; i < max; ++i) {
1795 if (tabRect(i).contains(position))
1803 void DragTabBar::mousePressEvent(QMouseEvent * event)
1805 if (event->button() == Qt::LeftButton)
1806 dragStartPos_ = event->pos();
1807 QTabBar::mousePressEvent(event);
1811 void DragTabBar::mouseMoveEvent(QMouseEvent * event)
1813 // If the left button isn't pressed anymore then return
1814 if (!(event->buttons() & Qt::LeftButton))
1817 // If the distance is too small then return
1818 if ((event->pos() - dragStartPos_).manhattanLength()
1819 < QApplication::startDragDistance())
1822 // did we hit something after all?
1823 int tab = tabAt(dragStartPos_);
1827 // simulate button release to remove highlight from button
1828 int i = currentIndex();
1829 QMouseEvent me(QEvent::MouseButtonRelease, dragStartPos_,
1830 event->button(), event->buttons(), 0);
1831 QTabBar::mouseReleaseEvent(&me);
1835 QDrag * drag = new QDrag(this);
1836 QMimeData * mimeData = new QMimeData;
1837 // a crude way to distinguish tab-reodering drops from other ones
1838 mimeData->setData("action", "tab-reordering") ;
1839 drag->setMimeData(mimeData);
1841 #if QT_VERSION >= 0x040300
1842 // get tab pixmap as cursor
1843 QRect r = tabRect(tab);
1844 QPixmap pixmap(r.size());
1845 render(&pixmap, - r.topLeft());
1846 drag->setPixmap(pixmap);
1849 drag->start(Qt::MoveAction);
1855 void DragTabBar::dragEnterEvent(QDragEnterEvent * event)
1857 // Only accept if it's an tab-reordering request
1858 QMimeData const * m = event->mimeData();
1859 QStringList formats = m->formats();
1860 if (formats.contains("action")
1861 && m->data("action") == "tab-reordering")
1862 event->acceptProposedAction();
1866 void DragTabBar::dropEvent(QDropEvent * event)
1868 int fromIndex = tabAt(dragStartPos_);
1869 int toIndex = tabAt(event->pos());
1871 // Tell interested objects that
1872 if (fromIndex != toIndex)
1873 tabMoveRequested(fromIndex, toIndex);
1874 event->acceptProposedAction();
1878 } // namespace frontend
1881 #include "moc_GuiWorkArea.cpp"