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_->updateDialogs();
458 // GUI tweaks except with mouse motion with no button pressed.
459 if (notJustMovingTheMouse) {
460 // Slight hack: this is only called currently when we
461 // clicked somewhere, so we force through the display
462 // of the new status here.
463 lyx_view_->clearMessage();
465 // Show the cursor immediately after any operation
466 startBlinkingCursor();
471 void GuiWorkArea::resizeBufferView()
473 // WARNING: Please don't put any code that will trigger a repaint here!
474 // We are already inside a paint event.
475 lyx_view_->setBusy(true);
476 buffer_view_->resize(viewport()->width(), viewport()->height());
479 // Update scrollbars which might have changed due different
480 // BufferView dimension. This is especially important when the
481 // BufferView goes from zero-size to the real-size for the first time,
482 // as the scrollbar paramters are then set for the first time.
485 lyx_view_->updateLayoutList();
486 lyx_view_->setBusy(false);
487 need_resize_ = false;
491 void GuiWorkArea::showCursor()
497 bool l_shape = false;
498 Font const & realfont = buffer_view_->cursor().real_current_font;
499 BufferParams const & bp = buffer_view_->buffer().params();
500 bool const samelang = realfont.language() == bp.language;
501 bool const isrtl = realfont.isVisibleRightToLeft();
503 if (!samelang || isrtl != bp.language->rightToLeft())
506 // The ERT language hack needs fixing up
507 if (realfont.language() == latex_language)
510 Font const font = buffer_view_->cursor().getFont();
511 FontMetrics const & fm = theFontMetrics(font);
512 int const asc = fm.maxAscent();
513 int const des = fm.maxDescent();
517 Cursor & cur = buffer_view_->cursor();
521 // if it doesn't touch the screen, don't try to show it
522 bool cursorInView = true;
523 if (y + h < 0 || y >= viewport()->height())
524 cursorInView = false;
526 // show cursor on screen
527 bool completable = cur.inset().showCompletionCursor()
528 && completer_->completionAvailable()
529 && !completer_->popupVisible()
530 && !completer_->inlineVisible();
532 cursor_visible_ = true;
533 showCursor(x, y, h, l_shape, isrtl, completable);
538 void GuiWorkArea::hideCursor()
540 if (!cursor_visible_)
543 cursor_visible_ = false;
548 void GuiWorkArea::toggleCursor()
557 void GuiWorkArea::updateScrollbar()
559 ScrollbarParameters const & scroll_ = buffer_view_->scrollbarParameters();
561 // Block the scrollbar signal to prevent recursive signal/slot calling.
562 verticalScrollBar()->blockSignals(true);
563 verticalScrollBar()->setRange(scroll_.min, scroll_.max);
564 verticalScrollBar()->setPageStep(scroll_.page_step);
565 verticalScrollBar()->setSingleStep(scroll_.single_step);
566 verticalScrollBar()->setValue(scroll_.position);
567 verticalScrollBar()->setSliderPosition(scroll_.position);
568 verticalScrollBar()->blockSignals(false);
572 void GuiWorkArea::scrollTo(int value)
574 stopBlinkingCursor();
575 buffer_view_->scrollDocView(value);
577 if (lyxrc.cursor_follows_scrollbar) {
578 buffer_view_->setCursorFromScrollbar();
579 lyx_view_->updateLayoutList();
581 // Show the cursor immediately after any operation.
582 startBlinkingCursor();
583 QApplication::syncX();
587 bool GuiWorkArea::event(QEvent * e)
590 case QEvent::ToolTip: {
591 QHelpEvent * helpEvent = static_cast<QHelpEvent *>(e);
592 if (lyxrc.use_tooltip) {
593 QPoint pos = helpEvent->pos();
594 if (pos.x() < viewport()->width()) {
595 QString s = toqstr(buffer_view_->toolTip(pos.x(), pos.y()));
596 QToolTip::showText(helpEvent->globalPos(), s);
599 QToolTip::hideText();
601 // Don't forget to accept the event!
606 case QEvent::ShortcutOverride: {
607 // We catch this event in order to catch the Tab or Shift+Tab key press
608 // which are otherwise reserved to focus switching between controls
610 QKeyEvent * ke = static_cast<QKeyEvent*>(e);
611 if ((ke->key() != Qt::Key_Tab && ke->key() != Qt::Key_Backtab)
612 || ke->modifiers() & Qt::ControlModifier)
613 return QAbstractScrollArea::event(e);
619 return QAbstractScrollArea::event(e);
625 void GuiWorkArea::contextMenuEvent(QContextMenuEvent * e)
627 QPoint pos = e->pos();
628 docstring name = buffer_view_->contextMenu(pos.x(), pos.y());
630 QAbstractScrollArea::contextMenuEvent(e);
633 QMenu * menu = guiApp->menus().menu(toqstr(name), *lyx_view_);
635 QAbstractScrollArea::contextMenuEvent(e);
638 // Position the menu to the right.
639 // FIXME: menu position should be different for RTL text.
640 menu->exec(e->globalPos());
645 void GuiWorkArea::focusInEvent(QFocusEvent * e)
647 if (lyx_view_->currentWorkArea() != this)
648 lyx_view_->setCurrentWorkArea(this);
650 // Repaint the whole screen.
651 // Note: this is different from redraw() as only the backing pixmap
652 // will be redrawn, which is cheap.
653 viewport()->repaint();
655 startBlinkingCursor();
656 QAbstractScrollArea::focusInEvent(e);
660 void GuiWorkArea::focusOutEvent(QFocusEvent * e)
662 stopBlinkingCursor();
663 QAbstractScrollArea::focusOutEvent(e);
667 void GuiWorkArea::mousePressEvent(QMouseEvent * e)
669 if (dc_event_.active && dc_event_ == *e) {
670 dc_event_.active = false;
671 FuncRequest cmd(LFUN_MOUSE_TRIPLE, e->x(), e->y(),
672 q_button_state(e->button()));
678 inputContext()->reset();
680 FuncRequest const cmd(LFUN_MOUSE_PRESS, e->x(), e->y(),
681 q_button_state(e->button()));
682 dispatch(cmd, q_key_state(e->modifiers()));
687 void GuiWorkArea::mouseReleaseEvent(QMouseEvent * e)
689 if (synthetic_mouse_event_.timeout.running())
690 synthetic_mouse_event_.timeout.stop();
692 FuncRequest const cmd(LFUN_MOUSE_RELEASE, e->x(), e->y(),
693 q_button_state(e->button()));
699 void GuiWorkArea::mouseMoveEvent(QMouseEvent * e)
701 // we kill the triple click if we move
702 doubleClickTimeout();
703 FuncRequest cmd(LFUN_MOUSE_MOTION, e->x(), e->y(),
704 q_motion_state(e->buttons()));
708 // If we're above or below the work area...
709 if (e->y() <= 20 || e->y() >= viewport()->height() - 20) {
710 // Make sure only a synthetic event can cause a page scroll,
711 // so they come at a steady rate:
713 // _Force_ a scroll up:
716 cmd.y = viewport()->height();
717 // Store the event, to be handled when the timeout expires.
718 synthetic_mouse_event_.cmd = cmd;
720 if (synthetic_mouse_event_.timeout.running())
721 // Discard the event. Note that it _may_ be handled
722 // when the timeout expires if
723 // synthetic_mouse_event_.cmd has not been overwritten.
724 // Ie, when the timeout expires, we handle the
725 // most recent event but discard all others that
726 // occurred after the one used to start the timeout
727 // in the first place.
730 synthetic_mouse_event_.restart_timeout = true;
731 synthetic_mouse_event_.timeout.start();
732 // Fall through to handle this event...
734 } else if (synthetic_mouse_event_.timeout.running()) {
735 // Store the event, to be possibly handled when the timeout
737 // Once the timeout has expired, normal control is returned
738 // to mouseMoveEvent (restart_timeout = false).
739 // This results in a much smoother 'feel' when moving the
740 // mouse back into the work area.
741 synthetic_mouse_event_.cmd = cmd;
742 synthetic_mouse_event_.restart_timeout = false;
746 // Has anything changed on-screen since the last QMouseEvent
748 double const scrollbar_value = verticalScrollBar()->value();
749 if (e->x() == synthetic_mouse_event_.x_old
750 && e->y() == synthetic_mouse_event_.y_old
751 && scrollbar_value == synthetic_mouse_event_.scrollbar_value_old) {
752 // Nothing changed on-screen since the last QMouseEvent.
756 // Yes something has changed. Store the params used to check this.
757 synthetic_mouse_event_.x_old = e->x();
758 synthetic_mouse_event_.y_old = e->y();
759 synthetic_mouse_event_.scrollbar_value_old = scrollbar_value;
761 // ... and dispatch the event to the LyX core.
766 void GuiWorkArea::wheelEvent(QWheelEvent * ev)
768 // Wheel rotation by one notch results in a delta() of 120 (see
769 // documentation of QWheelEvent)
770 int delta = ev->delta() / 120;
771 if (ev->modifiers() & Qt::ControlModifier) {
772 lyxrc.zoom -= 5 * delta;
775 // The global QPixmapCache is used in GuiPainter to cache text
776 // painting so we must reset it.
777 QPixmapCache::clear();
778 guiApp->fontLoader().update();
779 lyx::dispatch(FuncRequest(LFUN_SCREEN_FONT_UPDATE));
781 double const lines = qApp->wheelScrollLines()
782 * lyxrc.mouse_wheel_speed * delta;
783 LYXERR(Debug::SCROLLING, "wheelScrollLines = " << qApp->wheelScrollLines()
784 << " delta = " << ev->delta() << " lines = " << lines);
785 verticalScrollBar()->setValue(verticalScrollBar()->value() -
786 int(lines * verticalScrollBar()->singleStep()));
792 void GuiWorkArea::generateSyntheticMouseEvent()
794 // Set things off to generate the _next_ 'pseudo' event.
795 if (synthetic_mouse_event_.restart_timeout)
796 synthetic_mouse_event_.timeout.start();
798 // Has anything changed on-screen since the last timeout signal
800 double const scrollbar_value = verticalScrollBar()->value();
801 if (scrollbar_value != synthetic_mouse_event_.scrollbar_value_old) {
802 // Yes it has. Store the params used to check this.
803 synthetic_mouse_event_.scrollbar_value_old = scrollbar_value;
805 // ... and dispatch the event to the LyX core.
806 dispatch(synthetic_mouse_event_.cmd);
811 void GuiWorkArea::keyPressEvent(QKeyEvent * ev)
813 // intercept some keys if completion popup is visible
814 if (completer_->popupVisible()) {
818 completer_->activate();
824 // intercept keys for the completion
825 if (ev->key() == Qt::Key_Tab) {
831 if (completer_->popupVisible() && ev->key() == Qt::Key_Escape) {
832 completer_->hidePopup();
837 if (completer_->inlineVisible() && ev->key() == Qt::Key_Escape) {
838 completer_->hideInline();
843 // do nothing if there are other events
844 // (the auto repeated events come too fast)
845 // \todo FIXME: remove hard coded Qt keys, process the key binding
847 if (XEventsQueued(QX11Info::display(), 0) > 1 && ev->isAutoRepeat()
848 && (Qt::Key_PageDown || Qt::Key_PageUp)) {
849 LYXERR(Debug::KEY, "system is busy: scroll key event ignored");
855 LYXERR(Debug::KEY, " count: " << ev->count() << " text: " << ev->text()
856 << " isAutoRepeat: " << ev->isAutoRepeat() << " key: " << ev->key());
859 setKeySymbol(&sym, ev);
860 processKeySym(sym, q_key_state(ev->modifiers()));
865 void GuiWorkArea::doubleClickTimeout()
867 dc_event_.active = false;
871 void GuiWorkArea::mouseDoubleClickEvent(QMouseEvent * ev)
873 dc_event_ = DoubleClick(ev);
874 QTimer::singleShot(QApplication::doubleClickInterval(), this,
875 SLOT(doubleClickTimeout()));
876 FuncRequest cmd(LFUN_MOUSE_DOUBLE,
878 q_button_state(ev->button()));
884 void GuiWorkArea::resizeEvent(QResizeEvent * ev)
886 QAbstractScrollArea::resizeEvent(ev);
892 void GuiWorkArea::update(int x, int y, int w, int h)
894 viewport()->repaint(x, y, w, h);
898 void GuiWorkArea::paintEvent(QPaintEvent * ev)
900 QRect const rc = ev->rect();
901 // LYXERR(Debug::PAINTING, "paintEvent begin: x: " << rc.x()
902 // << " y: " << rc.y() << " w: " << rc.width() << " h: " << rc.height());
905 screen_ = QPixmap(viewport()->width(), viewport()->height());
911 QPainter pain(viewport());
912 pain.drawPixmap(rc, screen_, rc);
918 void GuiWorkArea::updateScreen()
920 GuiPainter pain(&screen_);
921 buffer_view_->draw(pain);
925 void GuiWorkArea::showCursor(int x, int y, int h,
926 bool l_shape, bool rtl, bool completable)
928 if (schedule_redraw_) {
929 buffer_view_->updateMetrics();
931 viewport()->update(QRect(0, 0, viewport()->width(), viewport()->height()));
932 schedule_redraw_ = false;
933 // Show the cursor immediately after the update.
939 cursor_->update(x, y, h, l_shape, rtl, completable);
941 viewport()->update(cursor_->rect());
945 void GuiWorkArea::removeCursor()
948 //if (!qApp->focusWidget())
949 viewport()->update(cursor_->rect());
953 void GuiWorkArea::inputMethodEvent(QInputMethodEvent * e)
955 QString const & commit_string = e->commitString();
956 docstring const & preedit_string
957 = qstring_to_ucs4(e->preeditString());
959 if (!commit_string.isEmpty()) {
961 LYXERR(Debug::KEY, "preeditString: " << e->preeditString()
962 << " commitString: " << e->commitString());
966 // FIXME Iwami 04/01/07: we should take care also of UTF16 surrogates here.
967 for (int i = 0; i != commit_string.size(); ++i) {
968 QKeyEvent ev(QEvent::KeyPress, key, Qt::NoModifier, commit_string[i]);
973 // Hide the cursor during the kana-kanji transformation.
974 if (preedit_string.empty())
975 startBlinkingCursor();
977 stopBlinkingCursor();
979 // last_width : for checking if last preedit string was/wasn't empty.
980 static bool last_width = false;
981 if (!last_width && preedit_string.empty()) {
982 // if last_width is last length of preedit string.
987 GuiPainter pain(&screen_);
988 buffer_view_->updateMetrics();
989 buffer_view_->draw(pain);
990 FontInfo font = buffer_view_->cursor().getFont().fontInfo();
991 FontMetrics const & fm = theFontMetrics(font);
992 int height = fm.maxHeight();
993 int cur_x = cursor_->rect().left();
994 int cur_y = cursor_->rect().bottom();
996 // redraw area of preedit string.
997 update(0, cur_y - height, viewport()->width(),
998 (height + 1) * preedit_lines_);
1000 if (preedit_string.empty()) {
1008 // att : stores an IM attribute.
1009 QList<QInputMethodEvent::Attribute> const & att = e->attributes();
1011 // get attributes of input method cursor.
1012 // cursor_pos : cursor position in preedit string.
1013 size_t cursor_pos = 0;
1014 bool cursor_is_visible = false;
1015 for (int i = 0; i != att.size(); ++i) {
1016 if (att.at(i).type == QInputMethodEvent::Cursor) {
1017 cursor_pos = att.at(i).start;
1018 cursor_is_visible = att.at(i).length != 0;
1023 size_t preedit_length = preedit_string.length();
1025 // get position of selection in input method.
1026 // FIXME: isn't there a way to do this simplier?
1027 // rStart : cursor position in selected string in IM.
1029 // rLength : selected string length in IM.
1031 if (cursor_pos < preedit_length) {
1032 for (int i = 0; i != att.size(); ++i) {
1033 if (att.at(i).type == QInputMethodEvent::TextFormat) {
1034 if (att.at(i).start <= int(cursor_pos)
1035 && int(cursor_pos) < att.at(i).start + att.at(i).length) {
1036 rStart = att.at(i).start;
1037 rLength = att.at(i).length;
1038 if (!cursor_is_visible)
1039 cursor_pos += rLength;
1046 rStart = cursor_pos;
1050 int const right_margin = buffer_view_->rightMargin();
1051 Painter::preedit_style ps;
1052 // Most often there would be only one line:
1054 for (size_t pos = 0; pos != preedit_length; ++pos) {
1055 char_type const typed_char = preedit_string[pos];
1056 // reset preedit string style
1057 ps = Painter::preedit_default;
1059 // if we reached the right extremity of the screen, go to next line.
1060 if (cur_x + fm.width(typed_char) > viewport()->width() - right_margin) {
1061 cur_x = right_margin;
1062 cur_y += height + 1;
1065 // preedit strings are displayed with dashed underline
1066 // and partial strings are displayed white on black indicating
1067 // that we are in selecting mode in the input method.
1068 // FIXME: rLength == preedit_length is not a changing condition
1069 // FIXME: should be put out of the loop.
1071 && pos < rStart + rLength
1072 && !(cursor_pos < rLength && rLength == preedit_length))
1073 ps = Painter::preedit_selecting;
1075 if (pos == cursor_pos
1076 && (cursor_pos < rLength && rLength == preedit_length))
1077 ps = Painter::preedit_cursor;
1079 // draw one character and update cur_x.
1080 cur_x += pain.preeditText(cur_x, cur_y, typed_char, font, ps);
1083 // update the preedit string screen area.
1084 update(0, cur_y - preedit_lines_*height, viewport()->width(),
1085 (height + 1) * preedit_lines_);
1087 // Don't forget to accept the event!
1092 QVariant GuiWorkArea::inputMethodQuery(Qt::InputMethodQuery query) const
1094 QRect cur_r(0,0,0,0);
1096 // this is the CJK-specific composition window position.
1097 case Qt::ImMicroFocus:
1098 cur_r = cursor_->rect();
1099 if (preedit_lines_ != 1)
1101 cur_r.moveBottom(cur_r.bottom() + cur_r.height() * preedit_lines_);
1102 // return lower right of cursor in LyX.
1105 return QWidget::inputMethodQuery(query);
1110 void GuiWorkArea::updateWindowTitle()
1112 docstring maximize_title;
1113 docstring minimize_title;
1115 Buffer & buf = buffer_view_->buffer();
1116 FileName const fileName = buf.fileName();
1117 if (!fileName.empty()) {
1118 maximize_title = fileName.displayName(30);
1119 minimize_title = from_utf8(fileName.onlyFileName());
1120 if (!buf.isClean()) {
1121 maximize_title += _(" (changed)");
1122 minimize_title += char_type('*');
1124 if (buf.isReadonly())
1125 maximize_title += _(" (read only)");
1128 QString title = windowTitle();
1129 QString new_title = toqstr(maximize_title);
1130 if (title == new_title)
1133 QWidget::setWindowTitle(new_title);
1134 QWidget::setWindowIconText(toqstr(minimize_title));
1139 void GuiWorkArea::setReadOnly(bool)
1141 updateWindowTitle();
1142 if (this == lyx_view_->currentWorkArea())
1143 lyx_view_->updateDialogs();
1147 bool GuiWorkArea::isFullScreen()
1149 return lyx_view_ && lyx_view_->isFullScreen();
1153 ////////////////////////////////////////////////////////////////////
1157 ////////////////////////////////////////////////////////////////////
1160 class NoTabFrameMacStyle : public QMacStyle {
1163 QRect subElementRect(SubElement element, const QStyleOption * option,
1164 const QWidget * widget = 0) const
1166 QRect rect = QMacStyle::subElementRect(element, option, widget);
1167 bool noBar = static_cast<QTabWidget const *>(widget)->count() <= 1;
1169 // The Qt Mac style puts the contents into a 3 pixel wide box
1170 // which looks very ugly and not like other Mac applications.
1171 // Hence we remove this here, and moreover the 16 pixel round
1172 // frame above if the tab bar is hidden.
1173 if (element == QStyle::SE_TabWidgetTabContents) {
1174 rect.adjust(- rect.left(), 0, rect.left(), 0);
1183 NoTabFrameMacStyle noTabFrameMacStyle;
1187 TabWorkArea::TabWorkArea(QWidget * parent)
1188 : QTabWidget(parent), clicked_tab_(-1)
1191 setStyle(&noTabFrameMacStyle);
1194 QPalette pal = palette();
1195 pal.setColor(QPalette::Active, QPalette::Button,
1196 pal.color(QPalette::Active, QPalette::Window));
1197 pal.setColor(QPalette::Disabled, QPalette::Button,
1198 pal.color(QPalette::Disabled, QPalette::Window));
1199 pal.setColor(QPalette::Inactive, QPalette::Button,
1200 pal.color(QPalette::Inactive, QPalette::Window));
1202 QObject::connect(this, SIGNAL(currentChanged(int)),
1203 this, SLOT(on_currentTabChanged(int)));
1205 QToolButton * closeBufferButton = new QToolButton(this);
1206 closeBufferButton->setPalette(pal);
1207 // FIXME: rename the icon to closebuffer.png
1208 closeBufferButton->setIcon(QIcon(":/images/closetab.png"));
1209 closeBufferButton->setText("Close File");
1210 closeBufferButton->setAutoRaise(true);
1211 closeBufferButton->setCursor(Qt::ArrowCursor);
1212 closeBufferButton->setToolTip(qt_("Close File"));
1213 closeBufferButton->setEnabled(true);
1214 QObject::connect(closeBufferButton, SIGNAL(clicked()),
1215 this, SLOT(closeCurrentBuffer()));
1216 setCornerWidget(closeBufferButton, Qt::TopRightCorner);
1218 // setup drag'n'drop
1219 QTabBar* tb = new DragTabBar;
1220 connect(tb, SIGNAL(tabMoveRequested(int, int)),
1221 this, SLOT(moveTab(int, int)));
1222 tb->setElideMode(Qt::ElideNone);
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(updateTabTexts()));
1317 if (currentWorkArea() && currentWorkArea()->isFullScreen())
1318 setFullScreen(true);
1320 // Hide tabbar if there's only one tab.
1321 showBar(count() > 1);
1329 bool TabWorkArea::removeWorkArea(GuiWorkArea * work_area)
1331 LASSERT(work_area, return false);
1332 int index = indexOf(work_area);
1336 work_area->setUpdatesEnabled(false);
1341 // make sure the next work area is enabled.
1342 currentWidget()->setUpdatesEnabled(true);
1343 if (currentWorkArea() && currentWorkArea()->isFullScreen())
1344 setFullScreen(true);
1346 // Hide tabbar if there's only one tab.
1347 showBar(count() > 1);
1349 lastWorkAreaRemoved();
1358 void TabWorkArea::on_currentTabChanged(int i)
1360 // returns e.g. on application destruction
1363 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i));
1364 LASSERT(wa, return);
1365 BufferView & bv = wa->bufferView();
1366 bv.cursor().fixIfBroken();
1368 wa->setUpdatesEnabled(true);
1372 currentWorkAreaChanged(wa);
1374 LYXERR(Debug::GUI, "currentTabChanged " << i
1375 << "File" << bv.buffer().absFileName());
1379 void TabWorkArea::closeCurrentBuffer()
1381 if (clicked_tab_ != -1)
1382 setCurrentIndex(clicked_tab_);
1384 lyx::dispatch(FuncRequest(LFUN_BUFFER_CLOSE));
1388 void TabWorkArea::closeCurrentTab()
1390 if (clicked_tab_ == -1)
1391 removeWorkArea(currentWorkArea());
1393 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(clicked_tab_));
1402 /// make vector happy
1405 DisplayPath(int tab, FileName const & filename)
1408 filename_ = toqstr(filename.onlyFileNameWithoutExt());
1409 postfix_ = toqstr(filename.absoluteFilePath()).
1410 split("/", QString::SkipEmptyParts);
1411 postfix_.pop_back();
1412 abs_ = toqstr(filename.absoluteFilePath());
1413 dottedPrefix_ = false;
1416 /// Absolute path for debugging.
1421 /// Add the first segment from the postfix or three dots to the prefix.
1422 /// Merge multiple dot tripples. In fact dots are added lazily, i.e. only
1423 /// when really needed.
1424 void shiftPathSegment(bool dotted)
1426 if (postfix_.count() <= 0)
1430 if (dottedPrefix_ && !prefix_.isEmpty())
1432 prefix_ += postfix_.front() + "/";
1434 dottedPrefix_ = dotted && !prefix_.isEmpty();
1435 postfix_.pop_front();
1438 QString displayString() const
1440 if (prefix_.isEmpty())
1443 bool dots = dottedPrefix_ || !postfix_.isEmpty();
1444 return prefix_ + (dots ? ".../" : "") + filename_;
1447 QString forecastPathString() const
1449 if (postfix_.count() == 0)
1450 return displayString();
1453 + (dottedPrefix_ ? ".../" : "")
1454 + postfix_.front() + "/";
1457 bool final() const { return postfix_.empty(); }
1459 int tab() const { return tab_; }
1465 QStringList postfix_;
1478 bool operator<(DisplayPath const & a, DisplayPath const & b)
1480 return a.displayString() < b.displayString();
1484 bool operator==(DisplayPath const & a, DisplayPath const & b)
1486 return a.displayString() == b.displayString();
1490 void TabWorkArea::updateTabTexts()
1495 std::list<DisplayPath> paths;
1496 typedef std::list<DisplayPath>::iterator It;
1498 // collect full names first: path into postfix, empty prefix and
1499 // filename without extension
1500 for (size_t i = 0; i < n; ++i) {
1501 GuiWorkArea * i_wa = dynamic_cast<GuiWorkArea *>(widget(i));
1502 FileName const fn = i_wa->bufferView().buffer().fileName();
1503 paths.push_back(DisplayPath(i, fn));
1506 // go through path segments and see if it helps to make the path more unique
1507 bool somethingChanged = true;
1508 bool allFinal = false;
1509 while (somethingChanged && !allFinal) {
1510 // adding path segments changes order
1513 LYXERR(Debug::GUI, "updateTabTexts() iteration start");
1514 somethingChanged = false;
1517 // find segments which are not unique (i.e. non-atomic)
1518 It it = paths.begin();
1520 QString segString = it->displayString();
1521 for (; it != paths.end(); ++it) {
1522 // look to the next item
1527 allFinal = allFinal && it->final();
1529 LYXERR(Debug::GUI, "it = " << it->abs()
1530 << " => " << it->displayString());
1532 // still the same segment?
1534 if ((next != paths.end()
1535 && (nextString = next->displayString()) == segString))
1537 LYXERR(Debug::GUI, "segment ended");
1539 // only a trivial one with one element?
1540 if (it == segStart) {
1541 // start new segment
1543 segString = nextString;
1547 // we found a non-atomic segment segStart <= sit <= it < next.
1548 // Shift path segments and hope for the best
1549 // that it makes the path more unique.
1550 somethingChanged = true;
1552 QString dspString = sit->forecastPathString();
1553 LYXERR(Debug::GUI, "first forecast found for "
1554 << sit->abs() << " => " << dspString);
1556 bool moreUnique = false;
1557 for (; sit != next; ++sit) {
1558 if (sit->forecastPathString() != dspString) {
1559 LYXERR(Debug::GUI, "different forecast found for "
1560 << sit->abs() << " => " << sit->forecastPathString());
1564 LYXERR(Debug::GUI, "same forecast found for "
1565 << sit->abs() << " => " << dspString);
1568 // if the path segment helped, add it. Otherwise add dots
1569 bool dots = !moreUnique;
1570 LYXERR(Debug::GUI, "using dots = " << dots);
1571 for (sit = segStart; sit != next; ++sit) {
1572 sit->shiftPathSegment(dots);
1573 LYXERR(Debug::GUI, "shifting "
1574 << sit->abs() << " => " << sit->displayString());
1577 // start new segment
1579 segString = nextString;
1583 // set new tab titles
1584 for (It it = paths.begin(); it != paths.end(); ++it) {
1585 GuiWorkArea * i_wa = dynamic_cast<GuiWorkArea *>(widget(it->tab()));
1586 Buffer & buf = i_wa->bufferView().buffer();
1587 if (!buf.fileName().empty() && !buf.isClean())
1588 setTabText(it->tab(), it->displayString() + "*");
1590 setTabText(it->tab(), it->displayString());
1595 void TabWorkArea::showContextMenu(const QPoint & pos)
1598 clicked_tab_ = static_cast<DragTabBar *>(tabBar())->tabAt(pos);
1599 if (clicked_tab_ == -1)
1604 popup.addAction(QIcon(":/images/hidetab.png"),
1605 qt_("Hide tab"), this, SLOT(closeCurrentTab()));
1606 popup.addAction(QIcon(":/images/closetab.png"),
1607 qt_("Close tab"), this, SLOT(closeCurrentBuffer()));
1608 popup.exec(tabBar()->mapToGlobal(pos));
1614 void TabWorkArea::moveTab(int fromIndex, int toIndex)
1616 QWidget * w = widget(fromIndex);
1617 QIcon icon = tabIcon(fromIndex);
1618 QString text = tabText(fromIndex);
1620 setCurrentIndex(fromIndex);
1621 removeTab(fromIndex);
1622 insertTab(toIndex, w, icon, text);
1623 setCurrentIndex(toIndex);
1627 DragTabBar::DragTabBar(QWidget* parent)
1630 setAcceptDrops(true);
1634 #if QT_VERSION < 0x040300
1635 int DragTabBar::tabAt(QPoint const & position) const
1637 const int max = count();
1638 for (int i = 0; i < max; ++i) {
1639 if (tabRect(i).contains(position))
1647 void DragTabBar::mousePressEvent(QMouseEvent * event)
1649 if (event->button() == Qt::LeftButton)
1650 dragStartPos_ = event->pos();
1651 QTabBar::mousePressEvent(event);
1655 void DragTabBar::mouseMoveEvent(QMouseEvent * event)
1657 // If the left button isn't pressed anymore then return
1658 if (!(event->buttons() & Qt::LeftButton))
1661 // If the distance is too small then return
1662 if ((event->pos() - dragStartPos_).manhattanLength()
1663 < QApplication::startDragDistance())
1666 // did we hit something after all?
1667 int tab = tabAt(dragStartPos_);
1671 // simulate button release to remove highlight from button
1672 int i = currentIndex();
1673 QMouseEvent me(QEvent::MouseButtonRelease, dragStartPos_,
1674 event->button(), event->buttons(), 0);
1675 QTabBar::mouseReleaseEvent(&me);
1679 QDrag * drag = new QDrag(this);
1680 QMimeData * mimeData = new QMimeData;
1681 // a crude way to distinguish tab-reodering drops from other ones
1682 mimeData->setData("action", "tab-reordering") ;
1683 drag->setMimeData(mimeData);
1685 #if QT_VERSION >= 0x040300
1686 // get tab pixmap as cursor
1687 QRect r = tabRect(tab);
1688 QPixmap pixmap(r.size());
1689 render(&pixmap, - r.topLeft());
1690 drag->setPixmap(pixmap);
1693 drag->start(Qt::MoveAction);
1699 void DragTabBar::dragEnterEvent(QDragEnterEvent * event)
1701 // Only accept if it's an tab-reordering request
1702 QMimeData const * m = event->mimeData();
1703 QStringList formats = m->formats();
1704 if (formats.contains("action")
1705 && m->data("action") == "tab-reordering")
1706 event->acceptProposedAction();
1710 void DragTabBar::dropEvent(QDropEvent * event)
1712 int fromIndex = tabAt(dragStartPos_);
1713 int toIndex = tabAt(event->pos());
1715 // Tell interested objects that
1716 if (fromIndex != toIndex)
1717 tabMoveRequested(fromIndex, toIndex);
1718 event->acceptProposedAction();
1722 } // namespace frontend
1725 #include "GuiWorkArea_moc.cpp"