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 "qt_helpers.h"
40 #include "TextMetrics.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 "support/bind.h"
77 int const CursorWidth = 2;
79 int const CursorWidth = 1;
81 int const TabIndicatorWidth = 3;
87 using namespace lyx::support;
92 /// return the LyX mouse button state from Qt's
93 static mouse_button::state q_button_state(Qt::MouseButton button)
95 mouse_button::state b = mouse_button::none;
98 b = mouse_button::button1;
101 b = mouse_button::button2;
103 case Qt::RightButton:
104 b = mouse_button::button3;
113 /// return the LyX mouse button state from Qt's
114 mouse_button::state q_motion_state(Qt::MouseButtons state)
116 mouse_button::state b = mouse_button::none;
117 if (state & Qt::LeftButton)
118 b |= mouse_button::button1;
119 if (state & Qt::MidButton)
120 b |= mouse_button::button2;
121 if (state & Qt::RightButton)
122 b |= mouse_button::button3;
133 void draw(QPainter & painter)
135 if (!show_ || !rect_.isValid())
139 int l = x_ - rect_.left();
140 int r = rect_.right() - x_;
141 int bot = rect_.bottom();
143 // draw vertica linel
144 painter.fillRect(x_, y, CursorWidth, rect_.height(), color_);
146 // draw RTL/LTR indication
147 painter.setPen(color_);
150 painter.drawLine(x_, bot, x_ - l, bot);
152 painter.drawLine(x_, bot, x_ + CursorWidth + r, bot);
155 // draw completion triangle
157 int m = y + rect_.height() / 2;
158 int d = TabIndicatorWidth - 1;
160 painter.drawLine(x_ - 1, m - d, x_ - 1 - d, m);
161 painter.drawLine(x_ - 1, m + d, x_ - 1 - d, m);
163 painter.drawLine(x_ + CursorWidth, m - d, x_ + CursorWidth + d, m);
164 painter.drawLine(x_ + CursorWidth, m + d, x_ + CursorWidth + d, m);
169 void update(int x, int y, int h, bool l_shape,
170 bool rtl, bool completable)
172 color_ = guiApp->colorCache().get(Color_cursor);
175 completable_ = completable;
178 // extension to left and right
182 // RTL/LTR indication
190 // completion triangle
193 l = max(l, TabIndicatorWidth);
195 r = max(r, TabIndicatorWidth);
198 // compute overall rectangle
199 rect_ = QRect(x - l, y, CursorWidth + r + l, h);
202 void show(bool set_show = true) { show_ = set_show; }
203 void hide() { show_ = false; }
205 QRect const & rect() { return rect_; }
208 /// cursor is in RTL or LTR text
210 /// indication for RTL or LTR
212 /// triangle to show that a completion is available
218 /// rectangle, possibly with l_shape and completion triangle
220 /// x position (were the vertical line is drawn)
225 // This is a 'heartbeat' generating synthetic mouse move events when the
226 // cursor is at the top or bottom edge of the viewport. One scroll per 0.2 s
227 SyntheticMouseEvent::SyntheticMouseEvent()
228 : timeout(200), restart_timeout(true)
232 GuiWorkArea::GuiWorkArea(QWidget *)
233 : buffer_view_(0), lyx_view_(0),
234 cursor_visible_(false),
235 need_resize_(false), schedule_redraw_(false),
236 preedit_lines_(1), completer_(new GuiCompleter(this, this)),
237 context_target_pos_()
242 GuiWorkArea::GuiWorkArea(Buffer & buffer, GuiView & gv)
243 : buffer_view_(0), read_only_(buffer.isReadonly()), lyx_view_(0),
244 cursor_visible_(false),
245 need_resize_(false), schedule_redraw_(false),
246 preedit_lines_(1), completer_(new GuiCompleter(this, this)),
247 context_target_pos_()
255 void GuiWorkArea::init()
258 connect(&cursor_timeout_, SIGNAL(timeout()),
259 this, SLOT(toggleCursor()));
261 int const time = QApplication::cursorFlashTime() / 2;
263 cursor_timeout_.setInterval(time);
264 cursor_timeout_.start();
266 // let's initialize this just to be safe
267 cursor_timeout_.setInterval(500);
270 screen_ = QPixmap(viewport()->width(), viewport()->height());
271 // With Qt4.5 a mouse event will happen before the first paint event
272 // so make sure that the buffer view has an up to date metrics.
273 buffer_view_->resize(viewport()->width(), viewport()->height());
274 cursor_ = new frontend::CursorWidget();
277 setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
278 setAcceptDrops(true);
279 setMouseTracking(true);
280 setMinimumSize(100, 70);
281 setFrameStyle(QFrame::NoFrame);
284 viewport()->setAutoFillBackground(false);
285 // We don't need double-buffering nor SystemBackground on
286 // the viewport because we have our own backing pixmap.
287 viewport()->setAttribute(Qt::WA_NoSystemBackground);
289 setFocusPolicy(Qt::StrongFocus);
291 viewport()->setCursor(Qt::IBeamCursor);
293 synthetic_mouse_event_.timeout.timeout.connect(
294 bind(&GuiWorkArea::generateSyntheticMouseEvent,
297 // Initialize the vertical Scroll Bar
298 QObject::connect(verticalScrollBar(), SIGNAL(valueChanged(int)),
299 this, SLOT(scrollTo(int)));
301 LYXERR(Debug::GUI, "viewport width: " << viewport()->width()
302 << " viewport height: " << viewport()->height());
304 // Enables input methods for asian languages.
305 // Must be set when creating custom text editing widgets.
306 setAttribute(Qt::WA_InputMethodEnabled, true);
308 dialog_mode_ = false;
312 GuiWorkArea::~GuiWorkArea()
314 buffer_view_->buffer().workAreaManager().remove(this);
317 // Completer has a QObject parent and is thus automatically destroyed.
319 // delete completer_;
323 void GuiWorkArea::setGuiView(GuiView & gv)
329 void GuiWorkArea::setBuffer(Buffer & buffer)
332 buffer_view_ = new BufferView(buffer);
333 buffer.workAreaManager().add(this);
335 // HACK: Prevents an additional redraw when the scrollbar pops up
336 // which regularily happens on documents with more than one page.
337 // The policy should be set to "Qt::ScrollBarAsNeeded" soon.
338 // Since we have no geometry information yet, we assume that
339 // a document needs a scrollbar if there is more then four
340 // paragraph in the outermost text.
341 if (buffer.text().paragraphs().size() > 4)
342 setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
343 QTimer::singleShot(50, this, SLOT(fixVerticalScrollBar()));
347 void GuiWorkArea::fixVerticalScrollBar()
350 setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
354 void GuiWorkArea::close()
356 lyx_view_->removeWorkArea(this);
360 void GuiWorkArea::setFullScreen(bool full_screen)
362 buffer_view_->setFullScreen(full_screen);
363 setFrameStyle(QFrame::NoFrame);
365 setFrameStyle(QFrame::NoFrame);
366 if (lyxrc.full_screen_scrollbar)
367 setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
369 setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
373 BufferView & GuiWorkArea::bufferView()
375 return *buffer_view_;
379 BufferView const & GuiWorkArea::bufferView() const
381 return *buffer_view_;
385 void GuiWorkArea::stopBlinkingCursor()
387 cursor_timeout_.stop();
392 void GuiWorkArea::startBlinkingCursor()
394 // do not show the cursor if the view is busy
400 buffer_view_->cursorPosAndHeight(p, h);
401 // Don't start blinking if the cursor isn't on screen.
402 if (!buffer_view_->cursorInView(p, h))
407 //we're not supposed to cache this value.
408 int const time = QApplication::cursorFlashTime() / 2;
411 cursor_timeout_.setInterval(time);
412 cursor_timeout_.start();
416 void GuiWorkArea::redraw(bool update_metrics)
419 // No need to redraw in this case.
422 // No need to do anything if this is the current view. The BufferView
423 // metrics are already up to date.
424 if (update_metrics || lyx_view_ != guiApp->currentView()
425 || lyx_view_->currentWorkArea() != this) {
426 // FIXME: it would be nice to optimize for the off-screen case.
427 buffer_view_->updateMetrics();
428 buffer_view_->cursor().fixIfBroken();
431 // update cursor position, because otherwise it has to wait until
432 // the blinking interval is over
433 if (cursor_visible_) {
438 LYXERR(Debug::WORKAREA, "WorkArea::redraw screen");
440 update(0, 0, viewport()->width(), viewport()->height());
442 /// \warning: scrollbar updating *must* be done after the BufferView is drawn
443 /// because \c BufferView::updateScrollbar() is called in \c BufferView::draw().
445 lyx_view_->updateStatusBar();
447 if (lyxerr.debugging(Debug::WORKAREA))
448 buffer_view_->coordCache().dump();
450 setReadOnly(buffer_view_->buffer().isReadonly());
454 void GuiWorkArea::processKeySym(KeySymbol const & key, KeyModifier mod)
456 if (lyx_view_->isFullScreen() && lyx_view_->menuBar()->isVisible()
457 && lyxrc.full_screen_menubar) {
458 // FIXME HACK: we should not have to do this here. See related comment
459 // in GuiView::event() (QEvent::ShortcutOverride)
460 lyx_view_->menuBar()->hide();
463 // In order to avoid bad surprise in the middle of an operation,
464 // we better stop the blinking cursor...
465 // the cursor gets restarted in GuiView::restartCursor()
466 stopBlinkingCursor();
467 guiApp->processKeySym(key, mod);
471 void GuiWorkArea::dispatch(FuncRequest const & cmd0, KeyModifier mod)
474 if (cmd0.action() == LFUN_FILE_OPEN) {
476 lyx_view_->dispatch(cmd0, dr);
482 if (cmd0.action() == LFUN_MOUSE_PRESS) {
483 if (mod == ShiftModifier)
484 cmd = FuncRequest(cmd0, "region-select");
485 else if (mod == ControlModifier)
486 cmd = FuncRequest(cmd0, "paragraph-select");
493 bool const notJustMovingTheMouse =
494 cmd.action() != LFUN_MOUSE_MOTION || cmd.button() != mouse_button::none;
496 // In order to avoid bad surprise in the middle of an operation, we better stop
497 // the blinking cursor.
498 if (notJustMovingTheMouse)
499 stopBlinkingCursor();
501 buffer_view_->mouseEventDispatch(cmd);
503 // Skip these when selecting
504 if (cmd.action() != LFUN_MOUSE_MOTION) {
505 completer_->updateVisibility(false, false);
506 lyx_view_->updateDialogs();
507 lyx_view_->updateStatusBar();
510 // GUI tweaks except with mouse motion with no button pressed.
511 if (notJustMovingTheMouse) {
512 // Slight hack: this is only called currently when we
513 // clicked somewhere, so we force through the display
514 // of the new status here.
515 lyx_view_->clearMessage();
517 // Show the cursor immediately after any operation
518 startBlinkingCursor();
523 void GuiWorkArea::resizeBufferView()
525 // WARNING: Please don't put any code that will trigger a repaint here!
526 // We are already inside a paint event.
527 lyx_view_->setBusy(true);
530 buffer_view_->cursorPosAndHeight(p, h);
531 bool const cursor_in_view = buffer_view_->cursorInView(p, h);
532 buffer_view_->resize(viewport()->width(), viewport()->height());
534 buffer_view_->scrollToCursor();
537 // Update scrollbars which might have changed due different
538 // BufferView dimension. This is especially important when the
539 // BufferView goes from zero-size to the real-size for the first time,
540 // as the scrollbar paramters are then set for the first time.
543 lyx_view_->updateLayoutList();
544 lyx_view_->setBusy(false);
545 need_resize_ = false;
549 void GuiWorkArea::showCursor()
556 buffer_view_->cursorPosAndHeight(p, h);
557 if (!buffer_view_->cursorInView(p, h))
561 bool l_shape = false;
562 Font const & realfont = buffer_view_->cursor().real_current_font;
563 BufferParams const & bp = buffer_view_->buffer().params();
564 bool const samelang = realfont.language() == bp.language;
565 bool const isrtl = realfont.isVisibleRightToLeft();
567 if (!samelang || isrtl != bp.language->rightToLeft())
570 // The ERT language hack needs fixing up
571 if (realfont.language() == latex_language)
574 // show cursor on screen
575 Cursor & cur = buffer_view_->cursor();
576 bool completable = cur.inset().showCompletionCursor()
577 && completer_->completionAvailable()
578 && !completer_->popupVisible()
579 && !completer_->inlineVisible();
580 cursor_visible_ = true;
581 showCursor(p.x_, p.y_, h, l_shape, isrtl, completable);
585 void GuiWorkArea::hideCursor()
587 if (!cursor_visible_)
590 cursor_visible_ = false;
595 void GuiWorkArea::toggleCursor()
604 void GuiWorkArea::updateScrollbar()
606 ScrollbarParameters const & scroll_ = buffer_view_->scrollbarParameters();
607 // WARNING: don't touch at the scrollbar value like this:
608 // verticalScrollBar()->setValue(scroll_.position);
609 // because this would cause a recursive signal/slot calling with
610 // GuiWorkArea::scrollTo
611 verticalScrollBar()->setRange(scroll_.min, scroll_.max);
612 verticalScrollBar()->setPageStep(scroll_.page_step);
613 verticalScrollBar()->setSingleStep(scroll_.single_step);
614 verticalScrollBar()->setSliderPosition(scroll_.position);
618 void GuiWorkArea::scrollTo(int value)
620 stopBlinkingCursor();
621 buffer_view_->scrollDocView(value, true);
623 if (lyxrc.cursor_follows_scrollbar) {
624 buffer_view_->setCursorFromScrollbar();
625 lyx_view_->updateLayoutList();
627 // Show the cursor immediately after any operation.
628 startBlinkingCursor();
629 QApplication::syncX();
633 bool GuiWorkArea::event(QEvent * e)
636 case QEvent::ToolTip: {
637 QHelpEvent * helpEvent = static_cast<QHelpEvent *>(e);
638 if (lyxrc.use_tooltip) {
639 QPoint pos = helpEvent->pos();
640 if (pos.x() < viewport()->width()) {
641 QString s = toqstr(buffer_view_->toolTip(pos.x(), pos.y()));
642 QToolTip::showText(helpEvent->globalPos(), s);
645 QToolTip::hideText();
647 // Don't forget to accept the event!
652 case QEvent::ShortcutOverride: {
653 // We catch this event in order to catch the Tab or Shift+Tab key press
654 // which are otherwise reserved to focus switching between controls
656 QKeyEvent * ke = static_cast<QKeyEvent*>(e);
657 if ((ke->key() != Qt::Key_Tab && ke->key() != Qt::Key_Backtab)
658 || ke->modifiers() & Qt::ControlModifier)
659 return QAbstractScrollArea::event(e);
665 return QAbstractScrollArea::event(e);
671 void GuiWorkArea::contextMenuEvent(QContextMenuEvent * e)
674 if (e->reason() == QContextMenuEvent::Mouse)
675 // the position is set on mouse press
676 pos = context_target_pos_;
679 Cursor const & cur = buffer_view_->cursor();
680 if (e->reason() == QContextMenuEvent::Keyboard && cur.inTexted()) {
681 // Do not access the context menu of math right in front of before
682 // the cursor. This does not work when the cursor is in text.
683 Inset * inset = cur.paragraph().getInset(cur.pos());
684 if (inset && inset->asInsetMath())
686 else if (cur.pos() > 0) {
687 Inset * inset = cur.paragraph().getInset(cur.pos() - 1);
692 docstring name = buffer_view_->contextMenu(pos.x(), pos.y());
694 QAbstractScrollArea::contextMenuEvent(e);
697 QMenu * menu = guiApp->menus().menu(toqstr(name), *lyx_view_);
699 QAbstractScrollArea::contextMenuEvent(e);
702 // Position the menu to the right.
703 // FIXME: menu position should be different for RTL text.
704 menu->exec(e->globalPos());
709 void GuiWorkArea::focusInEvent(QFocusEvent * e)
711 LYXERR(Debug::DEBUG, "GuiWorkArea::focusInEvent(): " << this << endl);
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 << 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 && e->buttons() == mouse_button::button1) {
775 // Make sure only a synthetic event can cause a page scroll,
776 // so they come at a steady rate:
778 // _Force_ a scroll up:
779 cmd.set_y(e->y() - 21);
781 cmd.set_y(e->y() + 21);
782 // Store the event, to be handled when the timeout expires.
783 synthetic_mouse_event_.cmd = cmd;
785 if (synthetic_mouse_event_.timeout.running()) {
786 // Discard the event. Note that it _may_ be handled
787 // when the timeout expires if
788 // synthetic_mouse_event_.cmd has not been overwritten.
789 // Ie, when the timeout expires, we handle the
790 // most recent event but discard all others that
791 // occurred after the one used to start the timeout
792 // in the first place.
796 synthetic_mouse_event_.restart_timeout = true;
797 synthetic_mouse_event_.timeout.start();
798 // Fall through to handle this event...
800 } else if (synthetic_mouse_event_.timeout.running()) {
801 // Store the event, to be possibly handled when the timeout
803 // Once the timeout has expired, normal control is returned
804 // to mouseMoveEvent (restart_timeout = false).
805 // This results in a much smoother 'feel' when moving the
806 // mouse back into the work area.
807 synthetic_mouse_event_.cmd = cmd;
808 synthetic_mouse_event_.restart_timeout = false;
815 void GuiWorkArea::wheelEvent(QWheelEvent * ev)
817 // Wheel rotation by one notch results in a delta() of 120 (see
818 // documentation of QWheelEvent)
819 double const delta = ev->delta() / 120.0;
820 if (ev->modifiers() & Qt::ControlModifier) {
821 docstring arg = convert<docstring>(int(5 * delta));
822 lyx::dispatch(FuncRequest(LFUN_BUFFER_ZOOM_IN, arg));
826 // Take into account the desktop wide settings.
827 int const lines = qApp->wheelScrollLines();
828 int const page_step = verticalScrollBar()->pageStep();
829 // Test if the wheel mouse is set to one screen at a time.
830 int scroll_value = lines > page_step
831 ? page_step : lines * verticalScrollBar()->singleStep();
833 // Take into account the rotation and the user preferences.
834 scroll_value = int(scroll_value * delta * lyxrc.mouse_wheel_speed);
835 LYXERR(Debug::SCROLLING, "wheelScrollLines = " << lines
836 << " delta = " << delta << " scroll_value = " << scroll_value
837 << " page_step = " << page_step);
839 verticalScrollBar()->setValue(verticalScrollBar()->value() - scroll_value);
845 void GuiWorkArea::generateSyntheticMouseEvent()
847 int const e_y = synthetic_mouse_event_.cmd.y();
848 int const wh = buffer_view_->workHeight();
849 bool const up = e_y < 0;
850 bool const down = e_y > wh;
852 // Set things off to generate the _next_ 'pseudo' event.
854 if (synthetic_mouse_event_.restart_timeout) {
855 // This is some magic formulae to determine the speed
856 // of scrolling related to the position of the mouse.
859 int dist = up ? -e_y : e_y - wh;
860 time = max(min(200, 250000 / (dist * dist)), 1) ;
863 step = 80000 / (time * time);
867 synthetic_mouse_event_.timeout.setTimeout(time);
868 synthetic_mouse_event_.timeout.start();
871 // Can we scroll further ?
872 int const value = verticalScrollBar()->value();
873 if (value == verticalScrollBar()->maximum()
874 || value == verticalScrollBar()->minimum()) {
875 synthetic_mouse_event_.timeout.stop();
880 if (step <= 2 * wh) {
881 buffer_view_->scroll(up ? -step : step);
882 buffer_view_->updateMetrics();
884 buffer_view_->scrollDocView(value + up ? -step : step, false);
887 // In which paragraph do we have to set the cursor ?
888 Cursor & cur = buffer_view_->cursor();
889 TextMetrics const & tm = buffer_view_->textMetrics(cur.text());
891 pair<pit_type, const ParagraphMetrics *> p = up ? tm.first() : tm.last();
892 ParagraphMetrics const & pm = *p.second;
893 pit_type const pit = p.first;
895 if (pm.rows().empty())
898 // Find the row at which we set the cursor.
899 RowList::const_iterator rit = pm.rows().begin();
900 RowList::const_iterator rlast = pm.rows().end();
901 int yy = pm.position() - pm.ascent();
902 for (--rlast; rit != rlast; ++rit) {
903 int h = rit->height();
904 if ((up && yy + h > 0)
905 || (!up && yy + h > wh - defaultRowHeight()))
910 // Find the position of the cursor
912 int x = synthetic_mouse_event_.cmd.x();
913 pos_type const pos = rit->pos() + tm.getColumnNearX(pit, *rit, x, bound);
920 buffer_view_->buffer().changed(false);
925 void GuiWorkArea::keyPressEvent(QKeyEvent * ev)
927 // Do not process here some keys if dialog_mode_ is set
929 && (ev->modifiers() == Qt::NoModifier
930 || ev->modifiers() == Qt::ShiftModifier)
931 && (ev->key() == Qt::Key_Escape
932 || ev->key() == Qt::Key_Enter
933 || ev->key() == Qt::Key_Return)
939 // intercept some keys if completion popup is visible
940 if (completer_->popupVisible()) {
944 completer_->activate();
950 // do nothing if there are other events
951 // (the auto repeated events come too fast)
952 // it looks like this is only needed on X11
954 if (qApp->hasPendingEvents() && ev->isAutoRepeat()) {
955 LYXERR(Debug::KEY, "system is busy: keyPress event ignored");
961 LYXERR(Debug::KEY, " count: " << ev->count() << " text: " << ev->text()
962 << " isAutoRepeat: " << ev->isAutoRepeat() << " key: " << ev->key());
965 setKeySymbol(&sym, ev);
967 processKeySym(sym, q_key_state(ev->modifiers()));
975 void GuiWorkArea::doubleClickTimeout()
977 dc_event_.active = false;
981 void GuiWorkArea::mouseDoubleClickEvent(QMouseEvent * ev)
983 dc_event_ = DoubleClick(ev);
984 QTimer::singleShot(QApplication::doubleClickInterval(), this,
985 SLOT(doubleClickTimeout()));
986 FuncRequest cmd(LFUN_MOUSE_DOUBLE,
988 q_button_state(ev->button()));
994 void GuiWorkArea::resizeEvent(QResizeEvent * ev)
996 QAbstractScrollArea::resizeEvent(ev);
1002 void GuiWorkArea::update(int x, int y, int w, int h)
1004 viewport()->repaint(x, y, w, h);
1008 void GuiWorkArea::paintEvent(QPaintEvent * ev)
1010 QRect const rc = ev->rect();
1011 // LYXERR(Debug::PAINTING, "paintEvent begin: x: " << rc.x()
1012 // << " y: " << rc.y() << " w: " << rc.width() << " h: " << rc.height());
1015 screen_ = QPixmap(viewport()->width(), viewport()->height());
1017 if (cursor_visible_) {
1023 QPainter pain(viewport());
1024 pain.drawPixmap(rc, screen_, rc);
1025 cursor_->draw(pain);
1030 void GuiWorkArea::updateScreen()
1032 GuiPainter pain(&screen_);
1033 buffer_view_->draw(pain);
1037 void GuiWorkArea::showCursor(int x, int y, int h,
1038 bool l_shape, bool rtl, bool completable)
1040 if (schedule_redraw_) {
1041 // This happens when a graphic conversion is finished. As we don't know
1042 // the size of the new graphics, it's better the update everything.
1043 // We can't use redraw() here because this would trigger a infinite
1044 // recursive loop with showCursor().
1045 buffer_view_->resize(viewport()->width(), viewport()->height());
1048 viewport()->update(QRect(0, 0, viewport()->width(), viewport()->height()));
1049 schedule_redraw_ = false;
1050 // Show the cursor immediately after the update.
1056 cursor_->update(x, y, h, l_shape, rtl, completable);
1058 viewport()->update(cursor_->rect());
1062 void GuiWorkArea::removeCursor()
1065 //if (!qApp->focusWidget())
1066 viewport()->update(cursor_->rect());
1070 void GuiWorkArea::inputMethodEvent(QInputMethodEvent * e)
1072 QString const & commit_string = e->commitString();
1073 docstring const & preedit_string
1074 = qstring_to_ucs4(e->preeditString());
1076 if (!commit_string.isEmpty()) {
1078 LYXERR(Debug::KEY, "preeditString: " << e->preeditString()
1079 << " commitString: " << e->commitString());
1083 // FIXME Iwami 04/01/07: we should take care also of UTF16 surrogates here.
1084 for (int i = 0; i != commit_string.size(); ++i) {
1085 QKeyEvent ev(QEvent::KeyPress, key, Qt::NoModifier, commit_string[i]);
1090 // Hide the cursor during the kana-kanji transformation.
1091 if (preedit_string.empty())
1092 startBlinkingCursor();
1094 stopBlinkingCursor();
1096 // last_width : for checking if last preedit string was/wasn't empty.
1097 static bool last_width = false;
1098 if (!last_width && preedit_string.empty()) {
1099 // if last_width is last length of preedit string.
1104 GuiPainter pain(&screen_);
1105 buffer_view_->updateMetrics();
1106 buffer_view_->draw(pain);
1107 FontInfo font = buffer_view_->cursor().getFont().fontInfo();
1108 FontMetrics const & fm = theFontMetrics(font);
1109 int height = fm.maxHeight();
1110 int cur_x = cursor_->rect().left();
1111 int cur_y = cursor_->rect().bottom();
1113 // redraw area of preedit string.
1114 update(0, cur_y - height, viewport()->width(),
1115 (height + 1) * preedit_lines_);
1117 if (preedit_string.empty()) {
1125 // att : stores an IM attribute.
1126 QList<QInputMethodEvent::Attribute> const & att = e->attributes();
1128 // get attributes of input method cursor.
1129 // cursor_pos : cursor position in preedit string.
1130 size_t cursor_pos = 0;
1131 bool cursor_is_visible = false;
1132 for (int i = 0; i != att.size(); ++i) {
1133 if (att.at(i).type == QInputMethodEvent::Cursor) {
1134 cursor_pos = att.at(i).start;
1135 cursor_is_visible = att.at(i).length != 0;
1140 size_t preedit_length = preedit_string.length();
1142 // get position of selection in input method.
1143 // FIXME: isn't there a way to do this simplier?
1144 // rStart : cursor position in selected string in IM.
1146 // rLength : selected string length in IM.
1148 if (cursor_pos < preedit_length) {
1149 for (int i = 0; i != att.size(); ++i) {
1150 if (att.at(i).type == QInputMethodEvent::TextFormat) {
1151 if (att.at(i).start <= int(cursor_pos)
1152 && int(cursor_pos) < att.at(i).start + att.at(i).length) {
1153 rStart = att.at(i).start;
1154 rLength = att.at(i).length;
1155 if (!cursor_is_visible)
1156 cursor_pos += rLength;
1163 rStart = cursor_pos;
1167 int const right_margin = buffer_view_->rightMargin();
1168 Painter::preedit_style ps;
1169 // Most often there would be only one line:
1171 for (size_t pos = 0; pos != preedit_length; ++pos) {
1172 char_type const typed_char = preedit_string[pos];
1173 // reset preedit string style
1174 ps = Painter::preedit_default;
1176 // if we reached the right extremity of the screen, go to next line.
1177 if (cur_x + fm.width(typed_char) > viewport()->width() - right_margin) {
1178 cur_x = right_margin;
1179 cur_y += height + 1;
1182 // preedit strings are displayed with dashed underline
1183 // and partial strings are displayed white on black indicating
1184 // that we are in selecting mode in the input method.
1185 // FIXME: rLength == preedit_length is not a changing condition
1186 // FIXME: should be put out of the loop.
1188 && pos < rStart + rLength
1189 && !(cursor_pos < rLength && rLength == preedit_length))
1190 ps = Painter::preedit_selecting;
1192 if (pos == cursor_pos
1193 && (cursor_pos < rLength && rLength == preedit_length))
1194 ps = Painter::preedit_cursor;
1196 // draw one character and update cur_x.
1197 cur_x += pain.preeditText(cur_x, cur_y, typed_char, font, ps);
1200 // update the preedit string screen area.
1201 update(0, cur_y - preedit_lines_*height, viewport()->width(),
1202 (height + 1) * preedit_lines_);
1204 // Don't forget to accept the event!
1209 QVariant GuiWorkArea::inputMethodQuery(Qt::InputMethodQuery query) const
1211 QRect cur_r(0, 0, 0, 0);
1213 // this is the CJK-specific composition window position and
1214 // the context menu position when the menu key is pressed.
1215 case Qt::ImMicroFocus:
1216 cur_r = cursor_->rect();
1217 if (preedit_lines_ != 1)
1219 cur_r.moveBottom(cur_r.bottom()
1220 + cur_r.height() * (preedit_lines_ - 1));
1221 // return lower right of cursor in LyX.
1224 return QWidget::inputMethodQuery(query);
1229 void GuiWorkArea::updateWindowTitle()
1231 docstring maximize_title;
1232 docstring minimize_title;
1234 Buffer & buf = buffer_view_->buffer();
1235 FileName const fileName = buf.fileName();
1236 if (!fileName.empty()) {
1237 maximize_title = fileName.displayName(30);
1238 minimize_title = from_utf8(fileName.onlyFileName());
1239 if (buf.lyxvc().inUse()) {
1240 if (buf.lyxvc().locking())
1241 maximize_title += _(" (version control, locking)");
1243 maximize_title += _(" (version control)");
1245 if (!buf.isClean()) {
1246 maximize_title += _(" (changed)");
1247 minimize_title += char_type('*');
1249 if (buf.isReadonly())
1250 maximize_title += _(" (read only)");
1253 QString title = windowTitle();
1254 QString new_title = toqstr(maximize_title);
1255 if (title == new_title)
1258 QWidget::setWindowTitle(new_title);
1259 QWidget::setWindowIconText(toqstr(minimize_title));
1264 void GuiWorkArea::setReadOnly(bool read_only)
1266 if (read_only_ == read_only)
1268 read_only_ = read_only;
1269 updateWindowTitle();
1270 if (this == lyx_view_->currentWorkArea())
1271 lyx_view_->updateDialogs();
1275 bool GuiWorkArea::isFullScreen()
1277 return lyx_view_ && lyx_view_->isFullScreen();
1281 ////////////////////////////////////////////////////////////////////
1285 ////////////////////////////////////////////////////////////////////
1288 EmbeddedWorkArea::EmbeddedWorkArea(QWidget * w): GuiWorkArea(w)
1290 buffer_ = theBufferList().newBuffer(
1291 support::FileName::tempName().absFileName() + "_embedded.internal");
1292 buffer_->setUnnamed(true);
1293 buffer_->setFullyLoaded(true);
1294 setBuffer(*buffer_);
1295 setDialogMode(true);
1299 EmbeddedWorkArea::~EmbeddedWorkArea()
1301 // No need to destroy buffer and bufferview here, because it is done
1302 // in theBuffeerList() destruction loop at application exit
1306 void EmbeddedWorkArea::closeEvent(QCloseEvent * ev)
1309 GuiWorkArea::closeEvent(ev);
1313 void EmbeddedWorkArea::hideEvent(QHideEvent * ev)
1316 GuiWorkArea::hideEvent(ev);
1320 QSize EmbeddedWorkArea::sizeHint () const
1323 // GuiWorkArea sets the size to the screen's viewport
1324 // by returning a value this gets overridden
1325 // EmbeddedWorkArea is now sized to fit in the layout
1326 // of the parent, and has a minimum size set in GuiWorkArea
1327 // which is what we return here
1328 return QSize(100, 70);
1332 void EmbeddedWorkArea::disable()
1334 stopBlinkingCursor();
1335 if (view().currentWorkArea() != this)
1337 // No problem if currentMainWorkArea() is 0 (setCurrentWorkArea()
1338 // tolerates it and shows the background logo), what happens if
1339 // an EmbeddedWorkArea is closed after closing all document WAs
1340 view().setCurrentWorkArea(view().currentMainWorkArea());
1343 ////////////////////////////////////////////////////////////////////
1347 ////////////////////////////////////////////////////////////////////
1350 class NoTabFrameMacStyle : public QMacStyle {
1353 QRect subElementRect(SubElement element, const QStyleOption * option,
1354 const QWidget * widget = 0) const
1356 QRect rect = QMacStyle::subElementRect(element, option, widget);
1357 bool noBar = static_cast<QTabWidget const *>(widget)->count() <= 1;
1359 // The Qt Mac style puts the contents into a 3 pixel wide box
1360 // which looks very ugly and not like other Mac applications.
1361 // Hence we remove this here, and moreover the 16 pixel round
1362 // frame above if the tab bar is hidden.
1363 if (element == QStyle::SE_TabWidgetTabContents) {
1364 rect.adjust(- rect.left(), 0, rect.left(), 0);
1373 NoTabFrameMacStyle noTabFrameMacStyle;
1377 TabWorkArea::TabWorkArea(QWidget * parent)
1378 : QTabWidget(parent), clicked_tab_(-1)
1381 setStyle(&noTabFrameMacStyle);
1383 #if QT_VERSION < 0x040500
1384 lyxrc.single_close_tab_button = true;
1387 QPalette pal = palette();
1388 pal.setColor(QPalette::Active, QPalette::Button,
1389 pal.color(QPalette::Active, QPalette::Window));
1390 pal.setColor(QPalette::Disabled, QPalette::Button,
1391 pal.color(QPalette::Disabled, QPalette::Window));
1392 pal.setColor(QPalette::Inactive, QPalette::Button,
1393 pal.color(QPalette::Inactive, QPalette::Window));
1395 QObject::connect(this, SIGNAL(currentChanged(int)),
1396 this, SLOT(on_currentTabChanged(int)));
1398 closeBufferButton = new QToolButton(this);
1399 closeBufferButton->setPalette(pal);
1400 // FIXME: rename the icon to closebuffer.png
1401 closeBufferButton->setIcon(QIcon(getPixmap("images/", "closetab", "png")));
1402 closeBufferButton->setText("Close File");
1403 closeBufferButton->setAutoRaise(true);
1404 closeBufferButton->setCursor(Qt::ArrowCursor);
1405 closeBufferButton->setToolTip(qt_("Close File"));
1406 closeBufferButton->setEnabled(true);
1407 QObject::connect(closeBufferButton, SIGNAL(clicked()),
1408 this, SLOT(closeCurrentBuffer()));
1409 setCornerWidget(closeBufferButton, Qt::TopRightCorner);
1411 // setup drag'n'drop
1412 QTabBar* tb = new DragTabBar;
1413 connect(tb, SIGNAL(tabMoveRequested(int, int)),
1414 this, SLOT(moveTab(int, int)));
1415 tb->setElideMode(Qt::ElideNone);
1418 // make us responsible for the context menu of the tabbar
1419 tb->setContextMenuPolicy(Qt::CustomContextMenu);
1420 connect(tb, SIGNAL(customContextMenuRequested(const QPoint &)),
1421 this, SLOT(showContextMenu(const QPoint &)));
1422 #if QT_VERSION >= 0x040500
1423 connect(tb, SIGNAL(tabCloseRequested(int)),
1424 this, SLOT(closeTab(int)));
1427 setUsesScrollButtons(true);
1431 void TabWorkArea::mouseDoubleClickEvent(QMouseEvent * event)
1433 if (event->button() != Qt::LeftButton)
1436 // return early if double click on existing tabs
1437 for (int i = 0; i < count(); ++i)
1438 if (tabBar()->tabRect(i).contains(event->pos()))
1441 dispatch(FuncRequest(LFUN_BUFFER_NEW));
1445 void TabWorkArea::setFullScreen(bool full_screen)
1447 for (int i = 0; i != count(); ++i) {
1448 if (GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i)))
1449 wa->setFullScreen(full_screen);
1452 if (lyxrc.full_screen_tabbar)
1453 showBar(!full_screen && count() > 1);
1457 void TabWorkArea::showBar(bool show)
1459 tabBar()->setEnabled(show);
1460 tabBar()->setVisible(show);
1461 closeBufferButton->setVisible(show && lyxrc.single_close_tab_button);
1462 #if QT_VERSION >= 0x040500
1463 setTabsClosable(!lyxrc.single_close_tab_button);
1468 GuiWorkArea * TabWorkArea::currentWorkArea()
1473 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(currentWidget());
1479 GuiWorkArea * TabWorkArea::workArea(Buffer & buffer)
1481 // FIXME: this method doesn't work if we have more than work area
1482 // showing the same buffer.
1483 for (int i = 0; i != count(); ++i) {
1484 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i));
1485 LASSERT(wa, return 0);
1486 if (&wa->bufferView().buffer() == &buffer)
1493 void TabWorkArea::closeAll()
1496 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(0));
1504 bool TabWorkArea::setCurrentWorkArea(GuiWorkArea * work_area)
1506 LASSERT(work_area, /**/);
1507 int index = indexOf(work_area);
1511 if (index == currentIndex())
1512 // Make sure the work area is up to date.
1513 on_currentTabChanged(index);
1515 // Switch to the work area.
1516 setCurrentIndex(index);
1517 work_area->setFocus();
1523 GuiWorkArea * TabWorkArea::addWorkArea(Buffer & buffer, GuiView & view)
1525 GuiWorkArea * wa = new GuiWorkArea(buffer, view);
1526 wa->setUpdatesEnabled(false);
1527 // Hide tabbar if there's no tab (avoid a resize and a flashing tabbar
1528 // when hiding it again below).
1529 if (!(currentWorkArea() && currentWorkArea()->isFullScreen()))
1530 showBar(count() > 0);
1531 addTab(wa, wa->windowTitle());
1532 QObject::connect(wa, SIGNAL(titleChanged(GuiWorkArea *)),
1533 this, SLOT(updateTabTexts()));
1534 if (currentWorkArea() && currentWorkArea()->isFullScreen())
1535 setFullScreen(true);
1537 // Hide tabbar if there's only one tab.
1538 showBar(count() > 1);
1546 bool TabWorkArea::removeWorkArea(GuiWorkArea * work_area)
1548 LASSERT(work_area, return false);
1549 int index = indexOf(work_area);
1553 work_area->setUpdatesEnabled(false);
1558 // make sure the next work area is enabled.
1559 currentWidget()->setUpdatesEnabled(true);
1560 if (currentWorkArea() && currentWorkArea()->isFullScreen())
1561 setFullScreen(true);
1563 // Show tabbar only if there's more than one tab.
1564 showBar(count() > 1);
1566 lastWorkAreaRemoved();
1574 void TabWorkArea::on_currentTabChanged(int i)
1576 // returns e.g. on application destruction
1579 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i));
1580 LASSERT(wa, return);
1581 wa->setUpdatesEnabled(true);
1585 currentWorkAreaChanged(wa);
1587 LYXERR(Debug::GUI, "currentTabChanged " << i
1588 << " File: " << wa->bufferView().buffer().absFileName());
1592 void TabWorkArea::closeCurrentBuffer()
1595 if (clicked_tab_ == -1)
1596 wa = currentWorkArea();
1598 wa = dynamic_cast<GuiWorkArea *>(widget(clicked_tab_));
1601 wa->view().closeWorkArea(wa);
1605 void TabWorkArea::hideCurrentTab()
1608 if (clicked_tab_ == -1)
1609 wa = currentWorkArea();
1611 wa = dynamic_cast<GuiWorkArea *>(widget(clicked_tab_));
1614 wa->view().hideWorkArea(wa);
1618 void TabWorkArea::closeTab(int index)
1620 on_currentTabChanged(index);
1623 wa = currentWorkArea();
1625 wa = dynamic_cast<GuiWorkArea *>(widget(index));
1628 wa->view().closeWorkArea(wa);
1635 /// make vector happy
1638 DisplayPath(int tab, FileName const & filename)
1641 filename_ = (filename.extension() == "lyx") ?
1642 toqstr(filename.onlyFileNameWithoutExt())
1643 : toqstr(filename.onlyFileName());
1644 postfix_ = toqstr(filename.absoluteFilePath()).
1645 split("/", QString::SkipEmptyParts);
1646 postfix_.pop_back();
1647 abs_ = toqstr(filename.absoluteFilePath());
1648 dottedPrefix_ = false;
1651 /// Absolute path for debugging.
1656 /// Add the first segment from the postfix or three dots to the prefix.
1657 /// Merge multiple dot tripples. In fact dots are added lazily, i.e. only
1658 /// when really needed.
1659 void shiftPathSegment(bool dotted)
1661 if (postfix_.count() <= 0)
1665 if (dottedPrefix_ && !prefix_.isEmpty())
1667 prefix_ += postfix_.front() + "/";
1669 dottedPrefix_ = dotted && !prefix_.isEmpty();
1670 postfix_.pop_front();
1673 QString displayString() const
1675 if (prefix_.isEmpty())
1678 bool dots = dottedPrefix_ || !postfix_.isEmpty();
1679 return prefix_ + (dots ? ".../" : "") + filename_;
1682 QString forecastPathString() const
1684 if (postfix_.count() == 0)
1685 return displayString();
1688 + (dottedPrefix_ ? ".../" : "")
1689 + postfix_.front() + "/";
1692 bool final() const { return postfix_.empty(); }
1694 int tab() const { return tab_; }
1700 QStringList postfix_;
1713 bool operator<(DisplayPath const & a, DisplayPath const & b)
1715 return a.displayString() < b.displayString();
1719 bool operator==(DisplayPath const & a, DisplayPath const & b)
1721 return a.displayString() == b.displayString();
1725 void TabWorkArea::updateTabTexts()
1730 std::list<DisplayPath> paths;
1731 typedef std::list<DisplayPath>::iterator It;
1733 // collect full names first: path into postfix, empty prefix and
1734 // filename without extension
1735 for (size_t i = 0; i < n; ++i) {
1736 GuiWorkArea * i_wa = dynamic_cast<GuiWorkArea *>(widget(i));
1737 FileName const fn = i_wa->bufferView().buffer().fileName();
1738 paths.push_back(DisplayPath(i, fn));
1741 // go through path segments and see if it helps to make the path more unique
1742 bool somethingChanged = true;
1743 bool allFinal = false;
1744 while (somethingChanged && !allFinal) {
1745 // adding path segments changes order
1748 LYXERR(Debug::GUI, "updateTabTexts() iteration start");
1749 somethingChanged = false;
1752 // find segments which are not unique (i.e. non-atomic)
1753 It it = paths.begin();
1755 QString segString = it->displayString();
1756 for (; it != paths.end(); ++it) {
1757 // look to the next item
1762 allFinal = allFinal && it->final();
1764 LYXERR(Debug::GUI, "it = " << it->abs()
1765 << " => " << it->displayString());
1767 // still the same segment?
1769 if ((next != paths.end()
1770 && (nextString = next->displayString()) == segString))
1772 LYXERR(Debug::GUI, "segment ended");
1774 // only a trivial one with one element?
1775 if (it == segStart) {
1776 // start new segment
1778 segString = nextString;
1782 // we found a non-atomic segment segStart <= sit <= it < next.
1783 // Shift path segments and hope for the best
1784 // that it makes the path more unique.
1785 somethingChanged = true;
1787 QString dspString = sit->forecastPathString();
1788 LYXERR(Debug::GUI, "first forecast found for "
1789 << sit->abs() << " => " << dspString);
1791 bool moreUnique = false;
1792 for (; sit != next; ++sit) {
1793 if (sit->forecastPathString() != dspString) {
1794 LYXERR(Debug::GUI, "different forecast found for "
1795 << sit->abs() << " => " << sit->forecastPathString());
1799 LYXERR(Debug::GUI, "same forecast found for "
1800 << sit->abs() << " => " << dspString);
1803 // if the path segment helped, add it. Otherwise add dots
1804 bool dots = !moreUnique;
1805 LYXERR(Debug::GUI, "using dots = " << dots);
1806 for (sit = segStart; sit != next; ++sit) {
1807 sit->shiftPathSegment(dots);
1808 LYXERR(Debug::GUI, "shifting "
1809 << sit->abs() << " => " << sit->displayString());
1812 // start new segment
1814 segString = nextString;
1818 // set new tab titles
1819 for (It it = paths.begin(); it != paths.end(); ++it) {
1820 GuiWorkArea * i_wa = dynamic_cast<GuiWorkArea *>(widget(it->tab()));
1821 Buffer & buf = i_wa->bufferView().buffer();
1822 if (!buf.fileName().empty() && !buf.isClean())
1823 setTabText(it->tab(), it->displayString() + "*");
1825 setTabText(it->tab(), it->displayString());
1830 void TabWorkArea::showContextMenu(const QPoint & pos)
1833 clicked_tab_ = static_cast<DragTabBar *>(tabBar())->tabAt(pos);
1834 if (clicked_tab_ == -1)
1839 popup.addAction(QIcon(getPixmap("images/", "hidetab", "png")),
1840 qt_("Hide tab"), this, SLOT(hideCurrentTab()));
1841 popup.addAction(QIcon(getPixmap("images/", "closetab", "png")),
1842 qt_("Close tab"), this, SLOT(closeCurrentBuffer()));
1843 popup.exec(tabBar()->mapToGlobal(pos));
1849 void TabWorkArea::moveTab(int fromIndex, int toIndex)
1851 QWidget * w = widget(fromIndex);
1852 QIcon icon = tabIcon(fromIndex);
1853 QString text = tabText(fromIndex);
1855 setCurrentIndex(fromIndex);
1856 removeTab(fromIndex);
1857 insertTab(toIndex, w, icon, text);
1858 setCurrentIndex(toIndex);
1862 DragTabBar::DragTabBar(QWidget* parent)
1865 setAcceptDrops(true);
1866 #if QT_VERSION >= 0x040500
1867 setTabsClosable(!lyxrc.single_close_tab_button);
1872 #if QT_VERSION < 0x040300
1873 int DragTabBar::tabAt(QPoint const & position) const
1875 const int max = count();
1876 for (int i = 0; i < max; ++i) {
1877 if (tabRect(i).contains(position))
1885 void DragTabBar::mousePressEvent(QMouseEvent * event)
1887 if (event->button() == Qt::LeftButton)
1888 dragStartPos_ = event->pos();
1889 QTabBar::mousePressEvent(event);
1893 void DragTabBar::mouseMoveEvent(QMouseEvent * event)
1895 // If the left button isn't pressed anymore then return
1896 if (!(event->buttons() & Qt::LeftButton))
1899 // If the distance is too small then return
1900 if ((event->pos() - dragStartPos_).manhattanLength()
1901 < QApplication::startDragDistance())
1904 // did we hit something after all?
1905 int tab = tabAt(dragStartPos_);
1909 // simulate button release to remove highlight from button
1910 int i = currentIndex();
1911 QMouseEvent me(QEvent::MouseButtonRelease, dragStartPos_,
1912 event->button(), event->buttons(), 0);
1913 QTabBar::mouseReleaseEvent(&me);
1917 QDrag * drag = new QDrag(this);
1918 QMimeData * mimeData = new QMimeData;
1919 // a crude way to distinguish tab-reodering drops from other ones
1920 mimeData->setData("action", "tab-reordering") ;
1921 drag->setMimeData(mimeData);
1923 #if QT_VERSION >= 0x040300
1924 // get tab pixmap as cursor
1925 QRect r = tabRect(tab);
1926 QPixmap pixmap(r.size());
1927 render(&pixmap, - r.topLeft());
1928 drag->setPixmap(pixmap);
1931 drag->start(Qt::MoveAction);
1937 void DragTabBar::dragEnterEvent(QDragEnterEvent * event)
1939 // Only accept if it's an tab-reordering request
1940 QMimeData const * m = event->mimeData();
1941 QStringList formats = m->formats();
1942 if (formats.contains("action")
1943 && m->data("action") == "tab-reordering")
1944 event->acceptProposedAction();
1948 void DragTabBar::dropEvent(QDropEvent * event)
1950 int fromIndex = tabAt(dragStartPos_);
1951 int toIndex = tabAt(event->pos());
1953 // Tell interested objects that
1954 if (fromIndex != toIndex)
1955 tabMoveRequested(fromIndex, toIndex);
1956 event->acceptProposedAction();
1960 } // namespace frontend
1963 #include "moc_GuiWorkArea.cpp"