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"
17 #include "BufferParams.h"
18 #include "BufferView.h"
19 #include "CoordCache.h"
22 #include "FuncRequest.h"
23 #include "GuiApplication.h"
24 #include "GuiCompleter.h"
25 #include "GuiKeySymbol.h"
26 #include "GuiPainter.h"
28 #include "KeySymbol.h"
32 #include "MetricsInfo.h"
33 #include "qt_helpers.h"
37 #include "graphics/GraphicsImage.h"
38 #include "graphics/GraphicsLoader.h"
40 #include "support/debug.h"
41 #include "support/gettext.h"
42 #include "support/FileName.h"
44 #include "frontends/Application.h"
45 #include "frontends/FontMetrics.h"
46 #include "frontends/WorkAreaManager.h"
48 #include <QContextMenuEvent>
49 #include <QInputContext>
54 #include <QMainWindow>
58 #include <QPixmapCache>
61 #include <QToolButton>
64 #include <boost/bind.hpp>
68 extern "C" int XEventsQueued(Display *display, int mode);
72 int const CursorWidth = 2;
74 int const CursorWidth = 1;
76 int const TabIndicatorWidth = 3;
82 using namespace lyx::support;
87 /// return the LyX mouse button state from Qt's
88 static mouse_button::state q_button_state(Qt::MouseButton button)
90 mouse_button::state b = mouse_button::none;
93 b = mouse_button::button1;
96 b = mouse_button::button2;
99 b = mouse_button::button3;
108 /// return the LyX mouse button state from Qt's
109 mouse_button::state q_motion_state(Qt::MouseButtons state)
111 mouse_button::state b = mouse_button::none;
112 if (state & Qt::LeftButton)
113 b |= mouse_button::button1;
114 if (state & Qt::MidButton)
115 b |= mouse_button::button2;
116 if (state & Qt::RightButton)
117 b |= mouse_button::button3;
128 void draw(QPainter & painter)
130 if (!show_ || !rect_.isValid())
134 int l = x_ - rect_.left();
135 int r = rect_.right() - x_;
136 int bot = rect_.bottom();
138 // draw vertica linel
139 painter.fillRect(x_, y, CursorWidth, rect_.height(), color_);
141 // draw RTL/LTR indication
142 painter.setPen(color_);
145 painter.drawLine(x_, bot, x_ - l, bot);
147 painter.drawLine(x_, bot, x_ + CursorWidth + r, bot);
150 // draw completion triangle
152 int m = y + rect_.height() / 2;
153 int d = TabIndicatorWidth - 1;
155 painter.drawLine(x_ - 1, m - d, x_ - 1 - d, m);
156 painter.drawLine(x_ - 1, m + d, x_ - 1 - d, m);
158 painter.drawLine(x_ + CursorWidth, m - d, x_ + CursorWidth + d, m);
159 painter.drawLine(x_ + CursorWidth, m + d, x_ + CursorWidth + d, m);
164 void update(int x, int y, int h, bool l_shape,
165 bool rtl, bool completable)
167 color_ = guiApp->colorCache().get(Color_cursor);
170 completable_ = completable;
173 // extension to left and right
177 // RTL/LTR indication
185 // completion triangle
188 l = max(l, TabIndicatorWidth);
190 r = max(r, TabIndicatorWidth);
193 // compute overall rectangle
194 rect_ = QRect(x - l, y, CursorWidth + r + l, h);
197 void show(bool set_show = true) { show_ = set_show; }
198 void hide() { show_ = false; }
200 QRect const & rect() { return rect_; }
203 /// cursor is in RTL or LTR text
205 /// indication for RTL or LTR
207 /// triangle to show that a completion is available
213 /// rectangle, possibly with l_shape and completion triangle
215 /// x position (were the vertical line is drawn)
220 // This is a 'heartbeat' generating synthetic mouse move events when the
221 // cursor is at the top or bottom edge of the viewport. One scroll per 0.2 s
222 SyntheticMouseEvent::SyntheticMouseEvent()
223 : timeout(200), restart_timeout(true),
224 x_old(-1), y_old(-1), scrollbar_value_old(-1.0)
229 GuiWorkArea::GuiWorkArea(Buffer & buffer, GuiView & lv)
230 : buffer_view_(new BufferView(buffer)), lyx_view_(&lv),
231 cursor_visible_(false),
232 need_resize_(false), schedule_redraw_(false),
233 preedit_lines_(1), completer_(new GuiCompleter(this))
235 buffer.workAreaManager().add(this);
237 connect(&cursor_timeout_, SIGNAL(timeout()),
238 this, SLOT(toggleCursor()));
240 int const time = QApplication::cursorFlashTime() / 2;
242 cursor_timeout_.setInterval(time);
243 cursor_timeout_.start();
245 // let's initialize this just to be safe
246 cursor_timeout_.setInterval(500);
249 screen_ = QPixmap(viewport()->width(), viewport()->height());
250 cursor_ = new frontend::CursorWidget();
253 // HACK: Prevents an additional redraw when the scrollbar pops up
254 // which regularily happens on documents with more than one page.
255 // The policy should be set to "Qt::ScrollBarAsNeeded" soon.
256 // Since we have no geometry information yet, we assume that
257 // a document needs a scrollbar if there is more then four
258 // paragraph in the outermost text.
259 if (buffer.text().paragraphs().size() > 4)
260 setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
261 QTimer::singleShot(50, this, SLOT(fixVerticalScrollBar()));
264 setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
265 setAcceptDrops(true);
266 setMouseTracking(true);
267 setMinimumSize(100, 70);
269 setFrameStyle(QFrame::NoFrame);
271 setFrameStyle(QFrame::Box);
275 viewport()->setAutoFillBackground(false);
276 // We don't need double-buffering nor SystemBackground on
277 // the viewport because we have our own backing pixmap.
278 viewport()->setAttribute(Qt::WA_NoSystemBackground);
280 setFocusPolicy(Qt::WheelFocus);
282 viewport()->setCursor(Qt::IBeamCursor);
284 synthetic_mouse_event_.timeout.timeout.connect(
285 boost::bind(&GuiWorkArea::generateSyntheticMouseEvent,
288 // Initialize the vertical Scroll Bar
289 QObject::connect(verticalScrollBar(), SIGNAL(valueChanged(int)),
290 this, SLOT(scrollTo(int)));
292 LYXERR(Debug::GUI, "viewport width: " << viewport()->width()
293 << " viewport height: " << viewport()->height());
295 // Enables input methods for asian languages.
296 // Must be set when creating custom text editing widgets.
297 setAttribute(Qt::WA_InputMethodEnabled, true);
301 GuiWorkArea::~GuiWorkArea()
303 buffer_view_->buffer().workAreaManager().remove(this);
309 void GuiWorkArea::fixVerticalScrollBar()
312 setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
316 void GuiWorkArea::close()
318 lyx_view_->removeWorkArea(this);
322 void GuiWorkArea::setFullScreen(bool full_screen)
324 buffer_view_->setFullScreen(full_screen);
326 setFrameStyle(QFrame::NoFrame);
327 if (lyxrc.full_screen_scrollbar)
328 setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
331 setFrameStyle(QFrame::NoFrame);
333 setFrameStyle(QFrame::Box);
335 setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
340 BufferView & GuiWorkArea::bufferView()
342 return *buffer_view_;
346 BufferView const & GuiWorkArea::bufferView() const
348 return *buffer_view_;
352 void GuiWorkArea::stopBlinkingCursor()
354 cursor_timeout_.stop();
359 void GuiWorkArea::startBlinkingCursor()
362 //we're not supposed to cache this value.
363 int const time = QApplication::cursorFlashTime() / 2;
366 cursor_timeout_.setInterval(time);
367 cursor_timeout_.start();
371 void GuiWorkArea::redraw()
374 // No need to redraw in this case.
377 // No need to do anything if this is the current view. The BufferView
378 // metrics are already up to date.
379 if (lyx_view_ != guiApp->currentView()
380 || lyx_view_->currentWorkArea() != this) {
381 // FIXME: it would be nice to optimize for the off-screen case.
382 buffer_view_->updateMetrics();
383 buffer_view_->cursor().fixIfBroken();
386 // update cursor position, because otherwise it has to wait until
387 // the blinking interval is over
388 if (cursor_visible_) {
393 LYXERR(Debug::WORKAREA, "WorkArea::redraw screen");
395 update(0, 0, viewport()->width(), viewport()->height());
397 /// \warning: scrollbar updating *must* be done after the BufferView is drawn
398 /// because \c BufferView::updateScrollbar() is called in \c BufferView::draw().
400 lyx_view_->updateStatusBar();
402 if (lyxerr.debugging(Debug::WORKAREA))
403 buffer_view_->coordCache().dump();
407 void GuiWorkArea::processKeySym(KeySymbol const & key, KeyModifier mod)
409 // In order to avoid bad surprise in the middle of an operation,
410 // we better stop the blinking cursor...
411 // the cursor gets restarted in GuiView::restartCursor()
412 stopBlinkingCursor();
414 theLyXFunc().setLyXView(lyx_view_);
415 theLyXFunc().processKeySym(key, mod);
419 void GuiWorkArea::dispatch(FuncRequest const & cmd0, KeyModifier mod)
422 if (cmd0.action == LFUN_FILE_OPEN) {
423 lyx_view_->dispatch(cmd0);
427 theLyXFunc().setLyXView(lyx_view_);
431 if (cmd0.action == LFUN_MOUSE_PRESS) {
432 if (mod == ShiftModifier)
433 cmd = FuncRequest(cmd0, "region-select");
434 else if (mod == ControlModifier)
435 cmd = FuncRequest(cmd0, "paragraph-select");
442 bool const notJustMovingTheMouse =
443 cmd.action != LFUN_MOUSE_MOTION || cmd.button() != mouse_button::none;
445 // In order to avoid bad surprise in the middle of an operation, we better stop
446 // the blinking cursor.
447 if (notJustMovingTheMouse)
448 stopBlinkingCursor();
450 buffer_view_->mouseEventDispatch(cmd);
452 // Skip these when selecting
453 if (cmd.action != LFUN_MOUSE_MOTION) {
454 completer_->updateVisibility(false, false);
455 lyx_view_->updateLayoutList();
456 lyx_view_->updateToolbars();
459 // GUI tweaks except with mouse motion with no button pressed.
460 if (notJustMovingTheMouse) {
461 // Slight hack: this is only called currently when we
462 // clicked somewhere, so we force through the display
463 // of the new status here.
464 lyx_view_->clearMessage();
466 // Show the cursor immediately after any operation
467 startBlinkingCursor();
472 void GuiWorkArea::resizeBufferView()
474 // WARNING: Please don't put any code that will trigger a repaint here!
475 // We are already inside a paint event.
476 lyx_view_->setBusy(true);
477 buffer_view_->resize(viewport()->width(), viewport()->height());
480 // Update scrollbars which might have changed due different
481 // BufferView dimension. This is especially important when the
482 // BufferView goes from zero-size to the real-size for the first time,
483 // as the scrollbar paramters are then set for the first time.
486 lyx_view_->updateLayoutList();
487 lyx_view_->setBusy(false);
488 need_resize_ = false;
492 void GuiWorkArea::showCursor()
498 bool l_shape = false;
499 Font const & realfont = buffer_view_->cursor().real_current_font;
500 BufferParams const & bp = buffer_view_->buffer().params();
501 bool const samelang = realfont.language() == bp.language;
502 bool const isrtl = realfont.isVisibleRightToLeft();
504 if (!samelang || isrtl != bp.language->rightToLeft())
507 // The ERT language hack needs fixing up
508 if (realfont.language() == latex_language)
511 Font const font = buffer_view_->cursor().getFont();
512 FontMetrics const & fm = theFontMetrics(font);
513 int const asc = fm.maxAscent();
514 int const des = fm.maxDescent();
518 Cursor & cur = buffer_view_->cursor();
522 // if it doesn't touch the screen, don't try to show it
523 bool cursorInView = true;
524 if (y + h < 0 || y >= viewport()->height())
525 cursorInView = false;
527 // show cursor on screen
528 bool completable = cur.inset().showCompletionCursor()
529 && completer_->completionAvailable()
530 && !completer_->popupVisible()
531 && !completer_->inlineVisible();
533 cursor_visible_ = true;
534 showCursor(x, y, h, l_shape, isrtl, completable);
539 void GuiWorkArea::hideCursor()
541 if (!cursor_visible_)
544 cursor_visible_ = false;
549 void GuiWorkArea::toggleCursor()
558 void GuiWorkArea::updateScrollbar()
560 ScrollbarParameters const & scroll_ = buffer_view_->scrollbarParameters();
562 // Block the scrollbar signal to prevent recursive signal/slot calling.
563 verticalScrollBar()->blockSignals(true);
564 verticalScrollBar()->setRange(scroll_.min, scroll_.max);
565 verticalScrollBar()->setPageStep(scroll_.page_step);
566 verticalScrollBar()->setSingleStep(scroll_.single_step);
567 verticalScrollBar()->setValue(scroll_.position);
568 verticalScrollBar()->setSliderPosition(scroll_.position);
569 verticalScrollBar()->blockSignals(false);
573 void GuiWorkArea::scrollTo(int value)
575 stopBlinkingCursor();
576 buffer_view_->scrollDocView(value);
578 if (lyxrc.cursor_follows_scrollbar) {
579 buffer_view_->setCursorFromScrollbar();
580 lyx_view_->updateLayoutList();
582 // Show the cursor immediately after any operation.
583 startBlinkingCursor();
584 QApplication::syncX();
588 bool GuiWorkArea::event(QEvent * e)
591 case QEvent::ToolTip: {
592 QHelpEvent * helpEvent = static_cast<QHelpEvent *>(e);
593 if (lyxrc.use_tooltip) {
594 QPoint pos = helpEvent->pos();
595 if (pos.x() < viewport()->width()) {
596 QString s = toqstr(buffer_view_->toolTip(pos.x(), pos.y()));
597 QToolTip::showText(helpEvent->globalPos(), s);
600 QToolTip::hideText();
602 // Don't forget to accept the event!
607 case QEvent::ShortcutOverride: {
608 // We catch this event in order to catch the Tab or Shift+Tab key press
609 // which are otherwise reserved to focus switching between controls
611 QKeyEvent * ke = static_cast<QKeyEvent*>(e);
612 if ((ke->key() != Qt::Key_Tab && ke->key() != Qt::Key_Backtab)
613 || ke->modifiers() & Qt::ControlModifier)
614 return QAbstractScrollArea::event(e);
620 return QAbstractScrollArea::event(e);
626 void GuiWorkArea::contextMenuEvent(QContextMenuEvent * e)
628 QPoint pos = e->pos();
629 docstring name = buffer_view_->contextMenu(pos.x(), pos.y());
631 QAbstractScrollArea::contextMenuEvent(e);
634 QMenu * menu = guiApp->menus().menu(toqstr(name), *lyx_view_);
636 QAbstractScrollArea::contextMenuEvent(e);
639 // Position the menu to the right.
640 // FIXME: menu position should be different for RTL text.
641 menu->exec(e->globalPos());
646 void GuiWorkArea::focusInEvent(QFocusEvent * e)
648 if (lyx_view_->currentWorkArea() != this)
649 lyx_view_->setCurrentWorkArea(this);
651 // Repaint the whole screen.
652 // Note: this is different from redraw() as only the backing pixmap
653 // will be redrawn, which is cheap.
654 viewport()->repaint();
656 startBlinkingCursor();
657 QAbstractScrollArea::focusInEvent(e);
661 void GuiWorkArea::focusOutEvent(QFocusEvent * e)
663 stopBlinkingCursor();
664 QAbstractScrollArea::focusOutEvent(e);
668 void GuiWorkArea::mousePressEvent(QMouseEvent * e)
670 if (dc_event_.active && dc_event_ == *e) {
671 dc_event_.active = false;
672 FuncRequest cmd(LFUN_MOUSE_TRIPLE, e->x(), e->y(),
673 q_button_state(e->button()));
679 inputContext()->reset();
681 FuncRequest const cmd(LFUN_MOUSE_PRESS, e->x(), e->y(),
682 q_button_state(e->button()));
683 dispatch(cmd, q_key_state(e->modifiers()));
688 void GuiWorkArea::mouseReleaseEvent(QMouseEvent * e)
690 if (synthetic_mouse_event_.timeout.running())
691 synthetic_mouse_event_.timeout.stop();
693 FuncRequest const cmd(LFUN_MOUSE_RELEASE, e->x(), e->y(),
694 q_button_state(e->button()));
700 void GuiWorkArea::mouseMoveEvent(QMouseEvent * e)
702 // we kill the triple click if we move
703 doubleClickTimeout();
704 FuncRequest cmd(LFUN_MOUSE_MOTION, e->x(), e->y(),
705 q_motion_state(e->buttons()));
709 // If we're above or below the work area...
710 if (e->y() <= 20 || e->y() >= viewport()->height() - 20) {
711 // Make sure only a synthetic event can cause a page scroll,
712 // so they come at a steady rate:
714 // _Force_ a scroll up:
717 cmd.y = viewport()->height();
718 // Store the event, to be handled when the timeout expires.
719 synthetic_mouse_event_.cmd = cmd;
721 if (synthetic_mouse_event_.timeout.running())
722 // Discard the event. Note that it _may_ be handled
723 // when the timeout expires if
724 // synthetic_mouse_event_.cmd has not been overwritten.
725 // Ie, when the timeout expires, we handle the
726 // most recent event but discard all others that
727 // occurred after the one used to start the timeout
728 // in the first place.
731 synthetic_mouse_event_.restart_timeout = true;
732 synthetic_mouse_event_.timeout.start();
733 // Fall through to handle this event...
735 } else if (synthetic_mouse_event_.timeout.running()) {
736 // Store the event, to be possibly handled when the timeout
738 // Once the timeout has expired, normal control is returned
739 // to mouseMoveEvent (restart_timeout = false).
740 // This results in a much smoother 'feel' when moving the
741 // mouse back into the work area.
742 synthetic_mouse_event_.cmd = cmd;
743 synthetic_mouse_event_.restart_timeout = false;
747 // Has anything changed on-screen since the last QMouseEvent
749 double const scrollbar_value = verticalScrollBar()->value();
750 if (e->x() == synthetic_mouse_event_.x_old
751 && e->y() == synthetic_mouse_event_.y_old
752 && scrollbar_value == synthetic_mouse_event_.scrollbar_value_old) {
753 // Nothing changed on-screen since the last QMouseEvent.
757 // Yes something has changed. Store the params used to check this.
758 synthetic_mouse_event_.x_old = e->x();
759 synthetic_mouse_event_.y_old = e->y();
760 synthetic_mouse_event_.scrollbar_value_old = scrollbar_value;
762 // ... and dispatch the event to the LyX core.
767 void GuiWorkArea::wheelEvent(QWheelEvent * ev)
769 // Wheel rotation by one notch results in a delta() of 120 (see
770 // documentation of QWheelEvent)
771 int delta = ev->delta() / 120;
772 if (ev->modifiers() & Qt::ControlModifier) {
773 lyxrc.zoom -= 5 * delta;
776 // The global QPixmapCache is used in GuiPainter to cache text
777 // painting so we must reset it.
778 QPixmapCache::clear();
779 guiApp->fontLoader().update();
780 lyx::dispatch(FuncRequest(LFUN_SCREEN_FONT_UPDATE));
782 double const lines = qApp->wheelScrollLines()
783 * lyxrc.mouse_wheel_speed * delta;
784 LYXERR(Debug::SCROLLING, "wheelScrollLines = " << qApp->wheelScrollLines()
785 << " delta = " << ev->delta() << " lines = " << lines);
786 verticalScrollBar()->setValue(verticalScrollBar()->value() -
787 int(lines * verticalScrollBar()->singleStep()));
793 void GuiWorkArea::generateSyntheticMouseEvent()
795 // Set things off to generate the _next_ 'pseudo' event.
796 if (synthetic_mouse_event_.restart_timeout)
797 synthetic_mouse_event_.timeout.start();
799 // Has anything changed on-screen since the last timeout signal
801 double const scrollbar_value = verticalScrollBar()->value();
802 if (scrollbar_value != synthetic_mouse_event_.scrollbar_value_old) {
803 // Yes it has. Store the params used to check this.
804 synthetic_mouse_event_.scrollbar_value_old = scrollbar_value;
806 // ... and dispatch the event to the LyX core.
807 dispatch(synthetic_mouse_event_.cmd);
812 void GuiWorkArea::keyPressEvent(QKeyEvent * ev)
814 // intercept some keys if completion popup is visible
815 if (completer_->popupVisible()) {
819 completer_->activate();
825 // intercept keys for the completion
826 if (ev->key() == Qt::Key_Tab) {
832 if (completer_->popupVisible() && ev->key() == Qt::Key_Escape) {
833 completer_->hidePopup();
838 if (completer_->inlineVisible() && ev->key() == Qt::Key_Escape) {
839 completer_->hideInline();
844 // do nothing if there are other events
845 // (the auto repeated events come too fast)
846 // \todo FIXME: remove hard coded Qt keys, process the key binding
848 if (XEventsQueued(QX11Info::display(), 0) > 1 && ev->isAutoRepeat()
849 && (Qt::Key_PageDown || Qt::Key_PageUp)) {
850 LYXERR(Debug::KEY, "system is busy: scroll key event ignored");
856 LYXERR(Debug::KEY, " count: " << ev->count() << " text: " << ev->text()
857 << " isAutoRepeat: " << ev->isAutoRepeat() << " key: " << ev->key());
860 setKeySymbol(&sym, ev);
861 processKeySym(sym, q_key_state(ev->modifiers()));
866 void GuiWorkArea::doubleClickTimeout()
868 dc_event_.active = false;
872 void GuiWorkArea::mouseDoubleClickEvent(QMouseEvent * ev)
874 dc_event_ = DoubleClick(ev);
875 QTimer::singleShot(QApplication::doubleClickInterval(), this,
876 SLOT(doubleClickTimeout()));
877 FuncRequest cmd(LFUN_MOUSE_DOUBLE,
879 q_button_state(ev->button()));
885 void GuiWorkArea::resizeEvent(QResizeEvent * ev)
887 QAbstractScrollArea::resizeEvent(ev);
893 void GuiWorkArea::update(int x, int y, int w, int h)
895 viewport()->repaint(x, y, w, h);
899 void GuiWorkArea::paintEvent(QPaintEvent * ev)
901 QRect const rc = ev->rect();
902 // LYXERR(Debug::PAINTING, "paintEvent begin: x: " << rc.x()
903 // << " y: " << rc.y() << " w: " << rc.width() << " h: " << rc.height());
906 screen_ = QPixmap(viewport()->width(), viewport()->height());
912 QPainter pain(viewport());
913 pain.drawPixmap(rc, screen_, rc);
919 void GuiWorkArea::updateScreen()
921 GuiPainter pain(&screen_);
922 buffer_view_->draw(pain);
926 void GuiWorkArea::showCursor(int x, int y, int h,
927 bool l_shape, bool rtl, bool completable)
929 if (schedule_redraw_) {
930 buffer_view_->updateMetrics();
932 viewport()->update(QRect(0, 0, viewport()->width(), viewport()->height()));
933 schedule_redraw_ = false;
934 // Show the cursor immediately after the update.
940 cursor_->update(x, y, h, l_shape, rtl, completable);
942 viewport()->update(cursor_->rect());
946 void GuiWorkArea::removeCursor()
949 //if (!qApp->focusWidget())
950 viewport()->update(cursor_->rect());
954 void GuiWorkArea::inputMethodEvent(QInputMethodEvent * e)
956 QString const & commit_string = e->commitString();
957 docstring const & preedit_string
958 = qstring_to_ucs4(e->preeditString());
960 if (!commit_string.isEmpty()) {
962 LYXERR(Debug::KEY, "preeditString: " << e->preeditString()
963 << " commitString: " << e->commitString());
967 // FIXME Iwami 04/01/07: we should take care also of UTF16 surrogates here.
968 for (int i = 0; i != commit_string.size(); ++i) {
969 QKeyEvent ev(QEvent::KeyPress, key, Qt::NoModifier, commit_string[i]);
974 // Hide the cursor during the kana-kanji transformation.
975 if (preedit_string.empty())
976 startBlinkingCursor();
978 stopBlinkingCursor();
980 // last_width : for checking if last preedit string was/wasn't empty.
981 static bool last_width = false;
982 if (!last_width && preedit_string.empty()) {
983 // if last_width is last length of preedit string.
988 GuiPainter pain(&screen_);
989 buffer_view_->updateMetrics();
990 buffer_view_->draw(pain);
991 FontInfo font = buffer_view_->cursor().getFont().fontInfo();
992 FontMetrics const & fm = theFontMetrics(font);
993 int height = fm.maxHeight();
994 int cur_x = cursor_->rect().left();
995 int cur_y = cursor_->rect().bottom();
997 // redraw area of preedit string.
998 update(0, cur_y - height, viewport()->width(),
999 (height + 1) * preedit_lines_);
1001 if (preedit_string.empty()) {
1009 // att : stores an IM attribute.
1010 QList<QInputMethodEvent::Attribute> const & att = e->attributes();
1012 // get attributes of input method cursor.
1013 // cursor_pos : cursor position in preedit string.
1014 size_t cursor_pos = 0;
1015 bool cursor_is_visible = false;
1016 for (int i = 0; i != att.size(); ++i) {
1017 if (att.at(i).type == QInputMethodEvent::Cursor) {
1018 cursor_pos = att.at(i).start;
1019 cursor_is_visible = att.at(i).length != 0;
1024 size_t preedit_length = preedit_string.length();
1026 // get position of selection in input method.
1027 // FIXME: isn't there a way to do this simplier?
1028 // rStart : cursor position in selected string in IM.
1030 // rLength : selected string length in IM.
1032 if (cursor_pos < preedit_length) {
1033 for (int i = 0; i != att.size(); ++i) {
1034 if (att.at(i).type == QInputMethodEvent::TextFormat) {
1035 if (att.at(i).start <= int(cursor_pos)
1036 && int(cursor_pos) < att.at(i).start + att.at(i).length) {
1037 rStart = att.at(i).start;
1038 rLength = att.at(i).length;
1039 if (!cursor_is_visible)
1040 cursor_pos += rLength;
1047 rStart = cursor_pos;
1051 int const right_margin = buffer_view_->rightMargin();
1052 Painter::preedit_style ps;
1053 // Most often there would be only one line:
1055 for (size_t pos = 0; pos != preedit_length; ++pos) {
1056 char_type const typed_char = preedit_string[pos];
1057 // reset preedit string style
1058 ps = Painter::preedit_default;
1060 // if we reached the right extremity of the screen, go to next line.
1061 if (cur_x + fm.width(typed_char) > viewport()->width() - right_margin) {
1062 cur_x = right_margin;
1063 cur_y += height + 1;
1066 // preedit strings are displayed with dashed underline
1067 // and partial strings are displayed white on black indicating
1068 // that we are in selecting mode in the input method.
1069 // FIXME: rLength == preedit_length is not a changing condition
1070 // FIXME: should be put out of the loop.
1072 && pos < rStart + rLength
1073 && !(cursor_pos < rLength && rLength == preedit_length))
1074 ps = Painter::preedit_selecting;
1076 if (pos == cursor_pos
1077 && (cursor_pos < rLength && rLength == preedit_length))
1078 ps = Painter::preedit_cursor;
1080 // draw one character and update cur_x.
1081 cur_x += pain.preeditText(cur_x, cur_y, typed_char, font, ps);
1084 // update the preedit string screen area.
1085 update(0, cur_y - preedit_lines_*height, viewport()->width(),
1086 (height + 1) * preedit_lines_);
1088 // Don't forget to accept the event!
1093 QVariant GuiWorkArea::inputMethodQuery(Qt::InputMethodQuery query) const
1095 QRect cur_r(0,0,0,0);
1097 // this is the CJK-specific composition window position.
1098 case Qt::ImMicroFocus:
1099 cur_r = cursor_->rect();
1100 if (preedit_lines_ != 1)
1102 cur_r.moveBottom(cur_r.bottom() + cur_r.height() * preedit_lines_);
1103 // return lower right of cursor in LyX.
1106 return QWidget::inputMethodQuery(query);
1111 void GuiWorkArea::updateWindowTitle()
1113 docstring maximize_title;
1114 docstring minimize_title;
1116 Buffer & buf = buffer_view_->buffer();
1117 FileName const fileName = buf.fileName();
1118 if (!fileName.empty()) {
1119 maximize_title = fileName.displayName(30);
1120 minimize_title = from_utf8(fileName.onlyFileName());
1121 if (!buf.isClean()) {
1122 maximize_title += _(" (changed)");
1123 minimize_title += char_type('*');
1125 if (buf.isReadonly())
1126 maximize_title += _(" (read only)");
1129 QString title = windowTitle();
1130 QString new_title = toqstr(maximize_title);
1131 if (title == new_title)
1134 QWidget::setWindowTitle(new_title);
1135 QWidget::setWindowIconText(toqstr(minimize_title));
1140 void GuiWorkArea::setReadOnly(bool)
1142 updateWindowTitle();
1143 if (this == lyx_view_->currentWorkArea())
1144 lyx_view_->updateDialogs();
1148 bool GuiWorkArea::isFullScreen()
1150 return lyx_view_ && lyx_view_->isFullScreen();
1154 ////////////////////////////////////////////////////////////////////
1158 ////////////////////////////////////////////////////////////////////
1161 class NoTabFrameMacStyle : public QMacStyle {
1164 QRect subElementRect(SubElement element, const QStyleOption * option,
1165 const QWidget * widget = 0) const
1167 QRect rect = QMacStyle::subElementRect(element, option, widget);
1168 bool noBar = static_cast<QTabWidget const *>(widget)->count() <= 1;
1170 // The Qt Mac style puts the contents into a 3 pixel wide box
1171 // which looks very ugly and not like other Mac applications.
1172 // Hence we remove this here, and moreover the 16 pixel round
1173 // frame above if the tab bar is hidden.
1174 if (element == QStyle::SE_TabWidgetTabContents) {
1175 rect.adjust(- rect.left(), 0, rect.left(), 0);
1184 NoTabFrameMacStyle noTabFrameMacStyle;
1188 TabWorkArea::TabWorkArea(QWidget * parent)
1189 : QTabWidget(parent), clicked_tab_(-1)
1192 setStyle(&noTabFrameMacStyle);
1195 QPalette pal = palette();
1196 pal.setColor(QPalette::Active, QPalette::Button,
1197 pal.color(QPalette::Active, QPalette::Window));
1198 pal.setColor(QPalette::Disabled, QPalette::Button,
1199 pal.color(QPalette::Disabled, QPalette::Window));
1200 pal.setColor(QPalette::Inactive, QPalette::Button,
1201 pal.color(QPalette::Inactive, QPalette::Window));
1203 QObject::connect(this, SIGNAL(currentChanged(int)),
1204 this, SLOT(on_currentTabChanged(int)));
1206 QToolButton * closeBufferButton = new QToolButton(this);
1207 closeBufferButton->setPalette(pal);
1208 // FIXME: rename the icon to closebuffer.png
1209 closeBufferButton->setIcon(QIcon(":/images/closetab.png"));
1210 closeBufferButton->setText("Close File");
1211 closeBufferButton->setAutoRaise(true);
1212 closeBufferButton->setCursor(Qt::ArrowCursor);
1213 closeBufferButton->setToolTip(qt_("Close File"));
1214 closeBufferButton->setEnabled(true);
1215 QObject::connect(closeBufferButton, SIGNAL(clicked()),
1216 this, SLOT(closeCurrentBuffer()));
1217 setCornerWidget(closeBufferButton, Qt::TopRightCorner);
1219 // setup drag'n'drop
1220 QTabBar* tb = new DragTabBar;
1221 connect(tb, SIGNAL(tabMoveRequested(int, int)),
1222 this, SLOT(moveTab(int, int)));
1225 // make us responsible for the context menu of the tabbar
1226 tb->setContextMenuPolicy(Qt::CustomContextMenu);
1227 connect(tb, SIGNAL(customContextMenuRequested(const QPoint &)),
1228 this, SLOT(showContextMenu(const QPoint &)));
1230 setUsesScrollButtons(true);
1234 void TabWorkArea::setFullScreen(bool full_screen)
1236 for (int i = 0; i != count(); ++i) {
1237 if (GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i)))
1238 wa->setFullScreen(full_screen);
1241 if (lyxrc.full_screen_tabbar)
1242 showBar(!full_screen && count()>1);
1246 void TabWorkArea::showBar(bool show)
1248 tabBar()->setEnabled(show);
1249 tabBar()->setVisible(show);
1253 GuiWorkArea * TabWorkArea::currentWorkArea()
1258 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(currentWidget());
1264 GuiWorkArea * TabWorkArea::workArea(Buffer & buffer)
1266 for (int i = 0; i != count(); ++i) {
1267 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i));
1268 LASSERT(wa, return 0);
1269 if (&wa->bufferView().buffer() == &buffer)
1276 void TabWorkArea::closeAll()
1279 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(0));
1287 bool TabWorkArea::setCurrentWorkArea(GuiWorkArea * work_area)
1289 LASSERT(work_area, /**/);
1290 int index = indexOf(work_area);
1294 if (index == currentIndex())
1295 // Make sure the work area is up to date.
1296 on_currentTabChanged(index);
1298 // Switch to the work area.
1299 setCurrentIndex(index);
1300 work_area->setFocus();
1306 GuiWorkArea * TabWorkArea::addWorkArea(Buffer & buffer, GuiView & view)
1308 GuiWorkArea * wa = new GuiWorkArea(buffer, view);
1309 wa->setUpdatesEnabled(false);
1310 // Hide tabbar if there's no tab (avoid a resize and a flashing tabbar
1311 // when hiding it again below).
1312 if (!(currentWorkArea() && currentWorkArea()->isFullScreen()))
1313 showBar(count() > 0);
1314 addTab(wa, wa->windowTitle());
1315 QObject::connect(wa, SIGNAL(titleChanged(GuiWorkArea *)),
1316 this, SLOT(updateTabText(GuiWorkArea *)));
1317 if (currentWorkArea() && currentWorkArea()->isFullScreen())
1318 setFullScreen(true);
1320 // Hide tabbar if there's only one tab.
1321 showBar(count() > 1);
1327 bool TabWorkArea::removeWorkArea(GuiWorkArea * work_area)
1329 LASSERT(work_area, return false);
1330 int index = indexOf(work_area);
1334 work_area->setUpdatesEnabled(false);
1339 // make sure the next work area is enabled.
1340 currentWidget()->setUpdatesEnabled(true);
1341 if (currentWorkArea() && currentWorkArea()->isFullScreen())
1342 setFullScreen(true);
1344 // Hide tabbar if there's only one tab.
1345 showBar(count() > 1);
1347 lastWorkAreaRemoved();
1354 void TabWorkArea::on_currentTabChanged(int i)
1356 // returns e.g. on application destruction
1359 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i));
1360 LASSERT(wa, return);
1361 BufferView & bv = wa->bufferView();
1362 bv.cursor().fixIfBroken();
1364 wa->setUpdatesEnabled(true);
1368 currentWorkAreaChanged(wa);
1370 LYXERR(Debug::GUI, "currentTabChanged " << i
1371 << "File" << bv.buffer().absFileName());
1375 void TabWorkArea::closeCurrentBuffer()
1377 if (clicked_tab_ != -1)
1378 setCurrentIndex(clicked_tab_);
1380 lyx::dispatch(FuncRequest(LFUN_BUFFER_CLOSE));
1384 void TabWorkArea::closeCurrentTab()
1386 if (clicked_tab_ == -1)
1387 removeWorkArea(currentWorkArea());
1389 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(clicked_tab_));
1396 void TabWorkArea::updateTabText(GuiWorkArea * wa)
1398 int const i = indexOf(wa);
1401 setTabText(i, wa->windowTitle());
1405 void TabWorkArea::showContextMenu(const QPoint & pos)
1408 clicked_tab_ = static_cast<DragTabBar *>(tabBar())->tabAt(pos);
1409 if (clicked_tab_ != -1) {
1412 popup.addAction(QIcon(":/images/hidetab.png"),
1413 qt_("Hide tab"), this, SLOT(closeCurrentTab()));
1414 popup.addAction(QIcon(":/images/closetab.png"),
1415 qt_("Close tab"), this, SLOT(closeCurrentBuffer()));
1416 popup.exec(tabBar()->mapToGlobal(pos));
1423 void TabWorkArea::moveTab(int fromIndex, int toIndex)
1425 QWidget * w = widget(fromIndex);
1426 QIcon icon = tabIcon(fromIndex);
1427 QString text = tabText(fromIndex);
1429 setCurrentIndex(fromIndex);
1430 removeTab(fromIndex);
1431 insertTab(toIndex, w, icon, text);
1432 setCurrentIndex(toIndex);
1436 DragTabBar::DragTabBar(QWidget* parent)
1439 setAcceptDrops(true);
1443 #if QT_VERSION < 0x040300
1444 int DragTabBar::tabAt(QPoint const & position) const
1446 const int max = count();
1447 for (int i = 0; i < max; ++i) {
1448 if (tabRect(i).contains(position))
1456 void DragTabBar::mousePressEvent(QMouseEvent * event)
1458 if (event->button() == Qt::LeftButton)
1459 dragStartPos_ = event->pos();
1460 QTabBar::mousePressEvent(event);
1464 void DragTabBar::mouseMoveEvent(QMouseEvent * event)
1466 // If the left button isn't pressed anymore then return
1467 if (!(event->buttons() & Qt::LeftButton))
1470 // If the distance is too small then return
1471 if ((event->pos() - dragStartPos_).manhattanLength()
1472 < QApplication::startDragDistance())
1475 // did we hit something after all?
1476 int tab = tabAt(dragStartPos_);
1480 // simulate button release to remove highlight from button
1481 int i = currentIndex();
1482 QMouseEvent me(QEvent::MouseButtonRelease, dragStartPos_,
1483 event->button(), event->buttons(), 0);
1484 QTabBar::mouseReleaseEvent(&me);
1488 QDrag * drag = new QDrag(this);
1489 QMimeData * mimeData = new QMimeData;
1490 // a crude way to distinguish tab-reodering drops from other ones
1491 mimeData->setData("action", "tab-reordering") ;
1492 drag->setMimeData(mimeData);
1494 #if QT_VERSION >= 0x040300
1495 // get tab pixmap as cursor
1496 QRect r = tabRect(tab);
1497 QPixmap pixmap(r.size());
1498 render(&pixmap, - r.topLeft());
1499 drag->setPixmap(pixmap);
1502 drag->start(Qt::MoveAction);
1508 void DragTabBar::dragEnterEvent(QDragEnterEvent * event)
1510 // Only accept if it's an tab-reordering request
1511 QMimeData const * m = event->mimeData();
1512 QStringList formats = m->formats();
1513 if (formats.contains("action")
1514 && m->data("action") == "tab-reordering")
1515 event->acceptProposedAction();
1519 void DragTabBar::dropEvent(QDropEvent * event)
1521 int fromIndex = tabAt(dragStartPos_);
1522 int toIndex = tabAt(event->pos());
1524 // Tell interested objects that
1525 if (fromIndex != toIndex)
1526 tabMoveRequested(fromIndex, toIndex);
1527 event->acceptProposedAction();
1531 } // namespace frontend
1534 #include "GuiWorkArea_moc.cpp"