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 "BufferParams.h"
22 #include "BufferView.h"
23 #include "CoordCache.h"
26 #include "FuncRequest.h"
27 #include "GuiApplication.h"
28 #include "GuiCompleter.h"
29 #include "GuiKeySymbol.h"
30 #include "GuiPainter.h"
32 #include "KeySymbol.h"
36 #include "MetricsInfo.h"
37 #include "qt_helpers.h"
41 #include "graphics/GraphicsImage.h"
42 #include "graphics/GraphicsLoader.h"
44 #include "support/debug.h"
45 #include "support/gettext.h"
46 #include "support/FileName.h"
48 #include "frontends/Application.h"
49 #include "frontends/FontMetrics.h"
50 #include "frontends/WorkAreaManager.h"
52 #include <QContextMenuEvent>
53 #include <QInputContext>
58 #include <QMainWindow>
62 #include <QPixmapCache>
65 #include <QToolButton>
69 #include <boost/bind.hpp>
73 extern "C" int XEventsQueued(Display *display, int mode);
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),
229 x_old(-1), y_old(-1), scrollbar_value_old(-1.0)
234 GuiWorkArea::GuiWorkArea(Buffer & buffer, GuiView & lv)
235 : buffer_view_(new BufferView(buffer)), lyx_view_(&lv),
236 cursor_visible_(false),
237 need_resize_(false), schedule_redraw_(false),
238 preedit_lines_(1), completer_(new GuiCompleter(this))
240 buffer.workAreaManager().add(this);
242 connect(&cursor_timeout_, SIGNAL(timeout()),
243 this, SLOT(toggleCursor()));
245 int const time = QApplication::cursorFlashTime() / 2;
247 cursor_timeout_.setInterval(time);
248 cursor_timeout_.start();
250 // let's initialize this just to be safe
251 cursor_timeout_.setInterval(500);
254 screen_ = QPixmap(viewport()->width(), viewport()->height());
255 cursor_ = new frontend::CursorWidget();
258 // HACK: Prevents an additional redraw when the scrollbar pops up
259 // which regularily happens on documents with more than one page.
260 // The policy should be set to "Qt::ScrollBarAsNeeded" soon.
261 // Since we have no geometry information yet, we assume that
262 // a document needs a scrollbar if there is more then four
263 // paragraph in the outermost text.
264 if (buffer.text().paragraphs().size() > 4)
265 setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
266 QTimer::singleShot(50, this, SLOT(fixVerticalScrollBar()));
269 setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
270 setAcceptDrops(true);
271 setMouseTracking(true);
272 setMinimumSize(100, 70);
274 setFrameStyle(QFrame::NoFrame);
276 setFrameStyle(QFrame::Box);
280 viewport()->setAutoFillBackground(false);
281 // We don't need double-buffering nor SystemBackground on
282 // the viewport because we have our own backing pixmap.
283 viewport()->setAttribute(Qt::WA_NoSystemBackground);
285 setFocusPolicy(Qt::WheelFocus);
287 viewport()->setCursor(Qt::IBeamCursor);
289 synthetic_mouse_event_.timeout.timeout.connect(
290 boost::bind(&GuiWorkArea::generateSyntheticMouseEvent,
293 // Initialize the vertical Scroll Bar
294 QObject::connect(verticalScrollBar(), SIGNAL(valueChanged(int)),
295 this, SLOT(scrollTo(int)));
297 LYXERR(Debug::GUI, "viewport width: " << viewport()->width()
298 << " viewport height: " << viewport()->height());
300 // Enables input methods for asian languages.
301 // Must be set when creating custom text editing widgets.
302 setAttribute(Qt::WA_InputMethodEnabled, true);
306 GuiWorkArea::~GuiWorkArea()
308 buffer_view_->buffer().workAreaManager().remove(this);
314 void GuiWorkArea::fixVerticalScrollBar()
317 setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
321 void GuiWorkArea::close()
323 lyx_view_->removeWorkArea(this);
327 void GuiWorkArea::setFullScreen(bool full_screen)
329 buffer_view_->setFullScreen(full_screen);
331 setFrameStyle(QFrame::NoFrame);
332 if (lyxrc.full_screen_scrollbar)
333 setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
336 setFrameStyle(QFrame::NoFrame);
338 setFrameStyle(QFrame::Box);
340 setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
345 BufferView & GuiWorkArea::bufferView()
347 return *buffer_view_;
351 BufferView const & GuiWorkArea::bufferView() const
353 return *buffer_view_;
357 void GuiWorkArea::stopBlinkingCursor()
359 cursor_timeout_.stop();
364 void GuiWorkArea::startBlinkingCursor()
367 //we're not supposed to cache this value.
368 int const time = QApplication::cursorFlashTime() / 2;
371 cursor_timeout_.setInterval(time);
372 cursor_timeout_.start();
376 void GuiWorkArea::redraw()
379 // No need to redraw in this case.
382 // No need to do anything if this is the current view. The BufferView
383 // metrics are already up to date.
384 if (lyx_view_ != guiApp->currentView()
385 || lyx_view_->currentWorkArea() != this) {
386 // FIXME: it would be nice to optimize for the off-screen case.
387 buffer_view_->updateMetrics();
388 buffer_view_->cursor().fixIfBroken();
391 // update cursor position, because otherwise it has to wait until
392 // the blinking interval is over
393 if (cursor_visible_) {
398 LYXERR(Debug::WORKAREA, "WorkArea::redraw screen");
400 update(0, 0, viewport()->width(), viewport()->height());
402 /// \warning: scrollbar updating *must* be done after the BufferView is drawn
403 /// because \c BufferView::updateScrollbar() is called in \c BufferView::draw().
405 lyx_view_->updateStatusBar();
407 if (lyxerr.debugging(Debug::WORKAREA))
408 buffer_view_->coordCache().dump();
412 void GuiWorkArea::processKeySym(KeySymbol const & key, KeyModifier mod)
414 if (lyx_view_->isFullScreen() && lyx_view_->menuBar()->isVisible()) {
415 // FIXME HACK: we should not have to do this here. See related comment
416 // in GuiView::event() (QEvent::ShortcutOverride)
417 lyx_view_->menuBar()->hide();
420 // In order to avoid bad surprise in the middle of an operation,
421 // we better stop the blinking cursor...
422 // the cursor gets restarted in GuiView::restartCursor()
423 stopBlinkingCursor();
425 theLyXFunc().setLyXView(lyx_view_);
426 theLyXFunc().processKeySym(key, mod);
430 void GuiWorkArea::dispatch(FuncRequest const & cmd0, KeyModifier mod)
433 if (cmd0.action == LFUN_FILE_OPEN) {
434 lyx_view_->dispatch(cmd0);
438 theLyXFunc().setLyXView(lyx_view_);
442 if (cmd0.action == LFUN_MOUSE_PRESS) {
443 if (mod == ShiftModifier)
444 cmd = FuncRequest(cmd0, "region-select");
445 else if (mod == ControlModifier)
446 cmd = FuncRequest(cmd0, "paragraph-select");
453 bool const notJustMovingTheMouse =
454 cmd.action != LFUN_MOUSE_MOTION || cmd.button() != mouse_button::none;
456 // In order to avoid bad surprise in the middle of an operation, we better stop
457 // the blinking cursor.
458 if (notJustMovingTheMouse)
459 stopBlinkingCursor();
461 buffer_view_->mouseEventDispatch(cmd);
463 // Skip these when selecting
464 if (cmd.action != LFUN_MOUSE_MOTION) {
465 completer_->updateVisibility(false, false);
466 lyx_view_->updateDialogs();
469 // GUI tweaks except with mouse motion with no button pressed.
470 if (notJustMovingTheMouse) {
471 // Slight hack: this is only called currently when we
472 // clicked somewhere, so we force through the display
473 // of the new status here.
474 lyx_view_->clearMessage();
476 // Show the cursor immediately after any operation
477 startBlinkingCursor();
482 void GuiWorkArea::resizeBufferView()
484 // WARNING: Please don't put any code that will trigger a repaint here!
485 // We are already inside a paint event.
486 lyx_view_->setBusy(true);
487 buffer_view_->resize(viewport()->width(), viewport()->height());
490 // Update scrollbars which might have changed due different
491 // BufferView dimension. This is especially important when the
492 // BufferView goes from zero-size to the real-size for the first time,
493 // as the scrollbar paramters are then set for the first time.
496 lyx_view_->updateLayoutList();
497 lyx_view_->setBusy(false);
498 need_resize_ = false;
502 void GuiWorkArea::showCursor()
508 bool l_shape = false;
509 Font const & realfont = buffer_view_->cursor().real_current_font;
510 BufferParams const & bp = buffer_view_->buffer().params();
511 bool const samelang = realfont.language() == bp.language;
512 bool const isrtl = realfont.isVisibleRightToLeft();
514 if (!samelang || isrtl != bp.language->rightToLeft())
517 // The ERT language hack needs fixing up
518 if (realfont.language() == latex_language)
521 Font const font = buffer_view_->cursor().getFont();
522 FontMetrics const & fm = theFontMetrics(font);
523 int const asc = fm.maxAscent();
524 int const des = fm.maxDescent();
528 Cursor & cur = buffer_view_->cursor();
532 // if it doesn't touch the screen, don't try to show it
533 bool cursorInView = true;
534 if (y + h < 0 || y >= viewport()->height())
535 cursorInView = false;
537 // show cursor on screen
538 bool completable = cur.inset().showCompletionCursor()
539 && completer_->completionAvailable()
540 && !completer_->popupVisible()
541 && !completer_->inlineVisible();
543 cursor_visible_ = true;
544 showCursor(x, y, h, l_shape, isrtl, completable);
549 void GuiWorkArea::hideCursor()
551 if (!cursor_visible_)
554 cursor_visible_ = false;
559 void GuiWorkArea::toggleCursor()
568 void GuiWorkArea::updateScrollbar()
570 ScrollbarParameters const & scroll_ = buffer_view_->scrollbarParameters();
572 // Block the scrollbar signal to prevent recursive signal/slot calling.
573 verticalScrollBar()->blockSignals(true);
574 verticalScrollBar()->setRange(scroll_.min, scroll_.max);
575 verticalScrollBar()->setPageStep(scroll_.page_step);
576 verticalScrollBar()->setSingleStep(scroll_.single_step);
577 verticalScrollBar()->setValue(scroll_.position);
578 verticalScrollBar()->setSliderPosition(scroll_.position);
579 verticalScrollBar()->blockSignals(false);
583 void GuiWorkArea::scrollTo(int value)
585 stopBlinkingCursor();
586 buffer_view_->scrollDocView(value);
588 if (lyxrc.cursor_follows_scrollbar) {
589 buffer_view_->setCursorFromScrollbar();
590 lyx_view_->updateLayoutList();
592 // Show the cursor immediately after any operation.
593 startBlinkingCursor();
594 QApplication::syncX();
598 bool GuiWorkArea::event(QEvent * e)
601 case QEvent::ToolTip: {
602 QHelpEvent * helpEvent = static_cast<QHelpEvent *>(e);
603 if (lyxrc.use_tooltip) {
604 QPoint pos = helpEvent->pos();
605 if (pos.x() < viewport()->width()) {
606 QString s = toqstr(buffer_view_->toolTip(pos.x(), pos.y()));
607 QToolTip::showText(helpEvent->globalPos(), s);
610 QToolTip::hideText();
612 // Don't forget to accept the event!
617 case QEvent::ShortcutOverride: {
618 // We catch this event in order to catch the Tab or Shift+Tab key press
619 // which are otherwise reserved to focus switching between controls
621 QKeyEvent * ke = static_cast<QKeyEvent*>(e);
622 if ((ke->key() != Qt::Key_Tab && ke->key() != Qt::Key_Backtab)
623 || ke->modifiers() & Qt::ControlModifier)
624 return QAbstractScrollArea::event(e);
630 return QAbstractScrollArea::event(e);
636 void GuiWorkArea::contextMenuEvent(QContextMenuEvent * e)
638 QPoint pos = e->pos();
639 docstring name = buffer_view_->contextMenu(pos.x(), pos.y());
641 QAbstractScrollArea::contextMenuEvent(e);
644 QMenu * menu = guiApp->menus().menu(toqstr(name), *lyx_view_);
646 QAbstractScrollArea::contextMenuEvent(e);
649 // Position the menu to the right.
650 // FIXME: menu position should be different for RTL text.
651 menu->exec(e->globalPos());
656 void GuiWorkArea::focusInEvent(QFocusEvent * e)
658 if (lyx_view_->currentWorkArea() != this)
659 lyx_view_->setCurrentWorkArea(this);
661 startBlinkingCursor();
662 QAbstractScrollArea::focusInEvent(e);
666 void GuiWorkArea::focusOutEvent(QFocusEvent * e)
668 stopBlinkingCursor();
669 QAbstractScrollArea::focusOutEvent(e);
673 void GuiWorkArea::mousePressEvent(QMouseEvent * e)
675 if (dc_event_.active && dc_event_ == *e) {
676 dc_event_.active = false;
677 FuncRequest cmd(LFUN_MOUSE_TRIPLE, e->x(), e->y(),
678 q_button_state(e->button()));
684 inputContext()->reset();
686 FuncRequest const cmd(LFUN_MOUSE_PRESS, e->x(), e->y(),
687 q_button_state(e->button()));
688 dispatch(cmd, q_key_state(e->modifiers()));
693 void GuiWorkArea::mouseReleaseEvent(QMouseEvent * e)
695 if (synthetic_mouse_event_.timeout.running())
696 synthetic_mouse_event_.timeout.stop();
698 FuncRequest const cmd(LFUN_MOUSE_RELEASE, e->x(), e->y(),
699 q_button_state(e->button()));
705 void GuiWorkArea::mouseMoveEvent(QMouseEvent * e)
707 // we kill the triple click if we move
708 doubleClickTimeout();
709 FuncRequest cmd(LFUN_MOUSE_MOTION, e->x(), e->y(),
710 q_motion_state(e->buttons()));
714 // If we're above or below the work area...
715 if (e->y() <= 20 || e->y() >= viewport()->height() - 20) {
716 // Make sure only a synthetic event can cause a page scroll,
717 // so they come at a steady rate:
719 // _Force_ a scroll up:
722 cmd.y = viewport()->height();
723 // Store the event, to be handled when the timeout expires.
724 synthetic_mouse_event_.cmd = cmd;
726 if (synthetic_mouse_event_.timeout.running())
727 // Discard the event. Note that it _may_ be handled
728 // when the timeout expires if
729 // synthetic_mouse_event_.cmd has not been overwritten.
730 // Ie, when the timeout expires, we handle the
731 // most recent event but discard all others that
732 // occurred after the one used to start the timeout
733 // in the first place.
736 synthetic_mouse_event_.restart_timeout = true;
737 synthetic_mouse_event_.timeout.start();
738 // Fall through to handle this event...
740 } else if (synthetic_mouse_event_.timeout.running()) {
741 // Store the event, to be possibly handled when the timeout
743 // Once the timeout has expired, normal control is returned
744 // to mouseMoveEvent (restart_timeout = false).
745 // This results in a much smoother 'feel' when moving the
746 // mouse back into the work area.
747 synthetic_mouse_event_.cmd = cmd;
748 synthetic_mouse_event_.restart_timeout = false;
752 // Has anything changed on-screen since the last QMouseEvent
754 double const scrollbar_value = verticalScrollBar()->value();
755 if (e->x() == synthetic_mouse_event_.x_old
756 && e->y() == synthetic_mouse_event_.y_old
757 && scrollbar_value == synthetic_mouse_event_.scrollbar_value_old) {
758 // Nothing changed on-screen since the last QMouseEvent.
762 // Yes something has changed. Store the params used to check this.
763 synthetic_mouse_event_.x_old = e->x();
764 synthetic_mouse_event_.y_old = e->y();
765 synthetic_mouse_event_.scrollbar_value_old = scrollbar_value;
767 // ... and dispatch the event to the LyX core.
772 void GuiWorkArea::wheelEvent(QWheelEvent * ev)
774 // Wheel rotation by one notch results in a delta() of 120 (see
775 // documentation of QWheelEvent)
776 int delta = ev->delta() / 120;
777 if (ev->modifiers() & Qt::ControlModifier) {
778 lyxrc.zoom -= 5 * delta;
781 // The global QPixmapCache is used in GuiPainter to cache text
782 // painting so we must reset it.
783 QPixmapCache::clear();
784 guiApp->fontLoader().update();
785 lyx::dispatch(FuncRequest(LFUN_SCREEN_FONT_UPDATE));
787 double const lines = qApp->wheelScrollLines()
788 * lyxrc.mouse_wheel_speed * delta;
789 LYXERR(Debug::SCROLLING, "wheelScrollLines = " << qApp->wheelScrollLines()
790 << " delta = " << ev->delta() << " lines = " << lines);
791 verticalScrollBar()->setValue(verticalScrollBar()->value() -
792 int(lines * verticalScrollBar()->singleStep()));
798 void GuiWorkArea::generateSyntheticMouseEvent()
800 // Set things off to generate the _next_ 'pseudo' event.
801 if (synthetic_mouse_event_.restart_timeout)
802 synthetic_mouse_event_.timeout.start();
804 // Has anything changed on-screen since the last timeout signal
806 double const scrollbar_value = verticalScrollBar()->value();
807 if (scrollbar_value != synthetic_mouse_event_.scrollbar_value_old) {
808 // Yes it has. Store the params used to check this.
809 synthetic_mouse_event_.scrollbar_value_old = scrollbar_value;
811 // ... and dispatch the event to the LyX core.
812 dispatch(synthetic_mouse_event_.cmd);
817 void GuiWorkArea::keyPressEvent(QKeyEvent * ev)
819 // intercept some keys if completion popup is visible
820 if (completer_->popupVisible()) {
824 completer_->activate();
830 // intercept keys for the completion
831 if (ev->key() == Qt::Key_Tab) {
837 if (completer_->popupVisible() && ev->key() == Qt::Key_Escape) {
838 completer_->hidePopup();
843 if (completer_->inlineVisible() && ev->key() == Qt::Key_Escape) {
844 completer_->hideInline();
849 // do nothing if there are other events
850 // (the auto repeated events come too fast)
851 // \todo FIXME: remove hard coded Qt keys, process the key binding
853 if (XEventsQueued(QX11Info::display(), 0) > 1 && ev->isAutoRepeat()
854 && (Qt::Key_PageDown || Qt::Key_PageUp)) {
855 LYXERR(Debug::KEY, "system is busy: scroll key event ignored");
861 LYXERR(Debug::KEY, " count: " << ev->count() << " text: " << ev->text()
862 << " isAutoRepeat: " << ev->isAutoRepeat() << " key: " << ev->key());
865 setKeySymbol(&sym, ev);
866 processKeySym(sym, q_key_state(ev->modifiers()));
871 void GuiWorkArea::doubleClickTimeout()
873 dc_event_.active = false;
877 void GuiWorkArea::mouseDoubleClickEvent(QMouseEvent * ev)
879 dc_event_ = DoubleClick(ev);
880 QTimer::singleShot(QApplication::doubleClickInterval(), this,
881 SLOT(doubleClickTimeout()));
882 FuncRequest cmd(LFUN_MOUSE_DOUBLE,
884 q_button_state(ev->button()));
890 void GuiWorkArea::resizeEvent(QResizeEvent * ev)
892 QAbstractScrollArea::resizeEvent(ev);
898 void GuiWorkArea::update(int x, int y, int w, int h)
900 viewport()->repaint(x, y, w, h);
904 void GuiWorkArea::paintEvent(QPaintEvent * ev)
906 QRect const rc = ev->rect();
907 // LYXERR(Debug::PAINTING, "paintEvent begin: x: " << rc.x()
908 // << " y: " << rc.y() << " w: " << rc.width() << " h: " << rc.height());
911 screen_ = QPixmap(viewport()->width(), viewport()->height());
917 QPainter pain(viewport());
918 pain.drawPixmap(rc, screen_, rc);
924 void GuiWorkArea::updateScreen()
926 GuiPainter pain(&screen_);
927 buffer_view_->draw(pain);
931 void GuiWorkArea::showCursor(int x, int y, int h,
932 bool l_shape, bool rtl, bool completable)
934 if (schedule_redraw_) {
935 buffer_view_->updateMetrics();
937 viewport()->update(QRect(0, 0, viewport()->width(), viewport()->height()));
938 schedule_redraw_ = false;
939 // Show the cursor immediately after the update.
945 cursor_->update(x, y, h, l_shape, rtl, completable);
947 viewport()->update(cursor_->rect());
951 void GuiWorkArea::removeCursor()
954 //if (!qApp->focusWidget())
955 viewport()->update(cursor_->rect());
959 void GuiWorkArea::inputMethodEvent(QInputMethodEvent * e)
961 QString const & commit_string = e->commitString();
962 docstring const & preedit_string
963 = qstring_to_ucs4(e->preeditString());
965 if (!commit_string.isEmpty()) {
967 LYXERR(Debug::KEY, "preeditString: " << e->preeditString()
968 << " commitString: " << e->commitString());
972 // FIXME Iwami 04/01/07: we should take care also of UTF16 surrogates here.
973 for (int i = 0; i != commit_string.size(); ++i) {
974 QKeyEvent ev(QEvent::KeyPress, key, Qt::NoModifier, commit_string[i]);
979 // Hide the cursor during the kana-kanji transformation.
980 if (preedit_string.empty())
981 startBlinkingCursor();
983 stopBlinkingCursor();
985 // last_width : for checking if last preedit string was/wasn't empty.
986 static bool last_width = false;
987 if (!last_width && preedit_string.empty()) {
988 // if last_width is last length of preedit string.
993 GuiPainter pain(&screen_);
994 buffer_view_->updateMetrics();
995 buffer_view_->draw(pain);
996 FontInfo font = buffer_view_->cursor().getFont().fontInfo();
997 FontMetrics const & fm = theFontMetrics(font);
998 int height = fm.maxHeight();
999 int cur_x = cursor_->rect().left();
1000 int cur_y = cursor_->rect().bottom();
1002 // redraw area of preedit string.
1003 update(0, cur_y - height, viewport()->width(),
1004 (height + 1) * preedit_lines_);
1006 if (preedit_string.empty()) {
1014 // att : stores an IM attribute.
1015 QList<QInputMethodEvent::Attribute> const & att = e->attributes();
1017 // get attributes of input method cursor.
1018 // cursor_pos : cursor position in preedit string.
1019 size_t cursor_pos = 0;
1020 bool cursor_is_visible = false;
1021 for (int i = 0; i != att.size(); ++i) {
1022 if (att.at(i).type == QInputMethodEvent::Cursor) {
1023 cursor_pos = att.at(i).start;
1024 cursor_is_visible = att.at(i).length != 0;
1029 size_t preedit_length = preedit_string.length();
1031 // get position of selection in input method.
1032 // FIXME: isn't there a way to do this simplier?
1033 // rStart : cursor position in selected string in IM.
1035 // rLength : selected string length in IM.
1037 if (cursor_pos < preedit_length) {
1038 for (int i = 0; i != att.size(); ++i) {
1039 if (att.at(i).type == QInputMethodEvent::TextFormat) {
1040 if (att.at(i).start <= int(cursor_pos)
1041 && int(cursor_pos) < att.at(i).start + att.at(i).length) {
1042 rStart = att.at(i).start;
1043 rLength = att.at(i).length;
1044 if (!cursor_is_visible)
1045 cursor_pos += rLength;
1052 rStart = cursor_pos;
1056 int const right_margin = buffer_view_->rightMargin();
1057 Painter::preedit_style ps;
1058 // Most often there would be only one line:
1060 for (size_t pos = 0; pos != preedit_length; ++pos) {
1061 char_type const typed_char = preedit_string[pos];
1062 // reset preedit string style
1063 ps = Painter::preedit_default;
1065 // if we reached the right extremity of the screen, go to next line.
1066 if (cur_x + fm.width(typed_char) > viewport()->width() - right_margin) {
1067 cur_x = right_margin;
1068 cur_y += height + 1;
1071 // preedit strings are displayed with dashed underline
1072 // and partial strings are displayed white on black indicating
1073 // that we are in selecting mode in the input method.
1074 // FIXME: rLength == preedit_length is not a changing condition
1075 // FIXME: should be put out of the loop.
1077 && pos < rStart + rLength
1078 && !(cursor_pos < rLength && rLength == preedit_length))
1079 ps = Painter::preedit_selecting;
1081 if (pos == cursor_pos
1082 && (cursor_pos < rLength && rLength == preedit_length))
1083 ps = Painter::preedit_cursor;
1085 // draw one character and update cur_x.
1086 cur_x += pain.preeditText(cur_x, cur_y, typed_char, font, ps);
1089 // update the preedit string screen area.
1090 update(0, cur_y - preedit_lines_*height, viewport()->width(),
1091 (height + 1) * preedit_lines_);
1093 // Don't forget to accept the event!
1098 QVariant GuiWorkArea::inputMethodQuery(Qt::InputMethodQuery query) const
1100 QRect cur_r(0,0,0,0);
1102 // this is the CJK-specific composition window position.
1103 case Qt::ImMicroFocus:
1104 cur_r = cursor_->rect();
1105 if (preedit_lines_ != 1)
1107 cur_r.moveBottom(cur_r.bottom() + cur_r.height() * preedit_lines_);
1108 // return lower right of cursor in LyX.
1111 return QWidget::inputMethodQuery(query);
1116 void GuiWorkArea::updateWindowTitle()
1118 docstring maximize_title;
1119 docstring minimize_title;
1121 Buffer & buf = buffer_view_->buffer();
1122 FileName const fileName = buf.fileName();
1123 if (!fileName.empty()) {
1124 maximize_title = fileName.displayName(30);
1125 minimize_title = from_utf8(fileName.onlyFileName());
1126 if (!buf.isClean()) {
1127 maximize_title += _(" (changed)");
1128 minimize_title += char_type('*');
1130 if (buf.isReadonly())
1131 maximize_title += _(" (read only)");
1134 QString title = windowTitle();
1135 QString new_title = toqstr(maximize_title);
1136 if (title == new_title)
1139 QWidget::setWindowTitle(new_title);
1140 QWidget::setWindowIconText(toqstr(minimize_title));
1145 void GuiWorkArea::setReadOnly(bool)
1147 updateWindowTitle();
1148 if (this == lyx_view_->currentWorkArea())
1149 lyx_view_->updateDialogs();
1153 bool GuiWorkArea::isFullScreen()
1155 return lyx_view_ && lyx_view_->isFullScreen();
1159 ////////////////////////////////////////////////////////////////////
1163 ////////////////////////////////////////////////////////////////////
1166 class NoTabFrameMacStyle : public QMacStyle {
1169 QRect subElementRect(SubElement element, const QStyleOption * option,
1170 const QWidget * widget = 0) const
1172 QRect rect = QMacStyle::subElementRect(element, option, widget);
1173 bool noBar = static_cast<QTabWidget const *>(widget)->count() <= 1;
1175 // The Qt Mac style puts the contents into a 3 pixel wide box
1176 // which looks very ugly and not like other Mac applications.
1177 // Hence we remove this here, and moreover the 16 pixel round
1178 // frame above if the tab bar is hidden.
1179 if (element == QStyle::SE_TabWidgetTabContents) {
1180 rect.adjust(- rect.left(), 0, rect.left(), 0);
1189 NoTabFrameMacStyle noTabFrameMacStyle;
1193 TabWorkArea::TabWorkArea(QWidget * parent)
1194 : QTabWidget(parent), clicked_tab_(-1)
1197 setStyle(&noTabFrameMacStyle);
1200 QPalette pal = palette();
1201 pal.setColor(QPalette::Active, QPalette::Button,
1202 pal.color(QPalette::Active, QPalette::Window));
1203 pal.setColor(QPalette::Disabled, QPalette::Button,
1204 pal.color(QPalette::Disabled, QPalette::Window));
1205 pal.setColor(QPalette::Inactive, QPalette::Button,
1206 pal.color(QPalette::Inactive, QPalette::Window));
1208 QObject::connect(this, SIGNAL(currentChanged(int)),
1209 this, SLOT(on_currentTabChanged(int)));
1211 QToolButton * closeBufferButton = new QToolButton(this);
1212 closeBufferButton->setPalette(pal);
1213 // FIXME: rename the icon to closebuffer.png
1214 closeBufferButton->setIcon(QIcon(":/images/closetab.png"));
1215 closeBufferButton->setText("Close File");
1216 closeBufferButton->setAutoRaise(true);
1217 closeBufferButton->setCursor(Qt::ArrowCursor);
1218 closeBufferButton->setToolTip(qt_("Close File"));
1219 closeBufferButton->setEnabled(true);
1220 QObject::connect(closeBufferButton, SIGNAL(clicked()),
1221 this, SLOT(closeCurrentBuffer()));
1222 setCornerWidget(closeBufferButton, Qt::TopRightCorner);
1224 // setup drag'n'drop
1225 QTabBar* tb = new DragTabBar;
1226 connect(tb, SIGNAL(tabMoveRequested(int, int)),
1227 this, SLOT(moveTab(int, int)));
1228 tb->setElideMode(Qt::ElideNone);
1231 // make us responsible for the context menu of the tabbar
1232 tb->setContextMenuPolicy(Qt::CustomContextMenu);
1233 connect(tb, SIGNAL(customContextMenuRequested(const QPoint &)),
1234 this, SLOT(showContextMenu(const QPoint &)));
1236 setUsesScrollButtons(true);
1240 void TabWorkArea::setFullScreen(bool full_screen)
1242 for (int i = 0; i != count(); ++i) {
1243 if (GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i)))
1244 wa->setFullScreen(full_screen);
1247 if (lyxrc.full_screen_tabbar)
1248 showBar(!full_screen && count()>1);
1252 void TabWorkArea::showBar(bool show)
1254 tabBar()->setEnabled(show);
1255 tabBar()->setVisible(show);
1259 GuiWorkArea * TabWorkArea::currentWorkArea()
1264 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(currentWidget());
1270 GuiWorkArea * TabWorkArea::workArea(Buffer & buffer)
1272 for (int i = 0; i != count(); ++i) {
1273 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i));
1274 LASSERT(wa, return 0);
1275 if (&wa->bufferView().buffer() == &buffer)
1282 void TabWorkArea::closeAll()
1285 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(0));
1293 bool TabWorkArea::setCurrentWorkArea(GuiWorkArea * work_area)
1295 LASSERT(work_area, /**/);
1296 int index = indexOf(work_area);
1300 if (index == currentIndex())
1301 // Make sure the work area is up to date.
1302 on_currentTabChanged(index);
1304 // Switch to the work area.
1305 setCurrentIndex(index);
1306 work_area->setFocus();
1312 GuiWorkArea * TabWorkArea::addWorkArea(Buffer & buffer, GuiView & view)
1314 GuiWorkArea * wa = new GuiWorkArea(buffer, view);
1315 wa->setUpdatesEnabled(false);
1316 // Hide tabbar if there's no tab (avoid a resize and a flashing tabbar
1317 // when hiding it again below).
1318 if (!(currentWorkArea() && currentWorkArea()->isFullScreen()))
1319 showBar(count() > 0);
1320 addTab(wa, wa->windowTitle());
1321 QObject::connect(wa, SIGNAL(titleChanged(GuiWorkArea *)),
1322 this, SLOT(updateTabTexts()));
1323 if (currentWorkArea() && currentWorkArea()->isFullScreen())
1324 setFullScreen(true);
1326 // Hide tabbar if there's only one tab.
1327 showBar(count() > 1);
1335 bool TabWorkArea::removeWorkArea(GuiWorkArea * work_area)
1337 LASSERT(work_area, return false);
1338 int index = indexOf(work_area);
1342 work_area->setUpdatesEnabled(false);
1347 // make sure the next work area is enabled.
1348 currentWidget()->setUpdatesEnabled(true);
1349 if (currentWorkArea() && currentWorkArea()->isFullScreen())
1350 setFullScreen(true);
1352 // Hide tabbar if there's only one tab.
1353 showBar(count() > 1);
1355 lastWorkAreaRemoved();
1364 void TabWorkArea::on_currentTabChanged(int i)
1366 // returns e.g. on application destruction
1369 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i));
1370 LASSERT(wa, return);
1371 BufferView & bv = wa->bufferView();
1372 bv.cursor().fixIfBroken();
1374 wa->setUpdatesEnabled(true);
1378 currentWorkAreaChanged(wa);
1380 LYXERR(Debug::GUI, "currentTabChanged " << i
1381 << "File" << bv.buffer().absFileName());
1385 void TabWorkArea::closeCurrentBuffer()
1387 if (clicked_tab_ != -1)
1388 setCurrentIndex(clicked_tab_);
1390 lyx::dispatch(FuncRequest(LFUN_BUFFER_CLOSE));
1394 void TabWorkArea::closeCurrentTab()
1396 if (clicked_tab_ == -1)
1397 removeWorkArea(currentWorkArea());
1399 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(clicked_tab_));
1408 /// make vector happy
1411 DisplayPath(int tab, FileName const & filename)
1414 filename_ = toqstr(filename.onlyFileNameWithoutExt());
1415 postfix_ = toqstr(filename.absoluteFilePath()).
1416 split("/", QString::SkipEmptyParts);
1417 postfix_.pop_back();
1418 abs_ = toqstr(filename.absoluteFilePath());
1419 dottedPrefix_ = false;
1422 /// Absolute path for debugging.
1427 /// Add the first segment from the postfix or three dots to the prefix.
1428 /// Merge multiple dot tripples. In fact dots are added lazily, i.e. only
1429 /// when really needed.
1430 void shiftPathSegment(bool dotted)
1432 if (postfix_.count() <= 0)
1436 if (dottedPrefix_ && !prefix_.isEmpty())
1438 prefix_ += postfix_.front() + "/";
1440 dottedPrefix_ = dotted && !prefix_.isEmpty();
1441 postfix_.pop_front();
1444 QString displayString() const
1446 if (prefix_.isEmpty())
1449 bool dots = dottedPrefix_ || !postfix_.isEmpty();
1450 return prefix_ + (dots ? ".../" : "") + filename_;
1453 QString forecastPathString() const
1455 if (postfix_.count() == 0)
1456 return displayString();
1459 + (dottedPrefix_ ? ".../" : "")
1460 + postfix_.front() + "/";
1463 bool final() const { return postfix_.empty(); }
1465 int tab() const { return tab_; }
1471 QStringList postfix_;
1484 bool operator<(DisplayPath const & a, DisplayPath const & b)
1486 return a.displayString() < b.displayString();
1490 bool operator==(DisplayPath const & a, DisplayPath const & b)
1492 return a.displayString() == b.displayString();
1496 void TabWorkArea::updateTabTexts()
1501 std::list<DisplayPath> paths;
1502 typedef std::list<DisplayPath>::iterator It;
1504 // collect full names first: path into postfix, empty prefix and
1505 // filename without extension
1506 for (size_t i = 0; i < n; ++i) {
1507 GuiWorkArea * i_wa = dynamic_cast<GuiWorkArea *>(widget(i));
1508 FileName const fn = i_wa->bufferView().buffer().fileName();
1509 paths.push_back(DisplayPath(i, fn));
1512 // go through path segments and see if it helps to make the path more unique
1513 bool somethingChanged = true;
1514 bool allFinal = false;
1515 while (somethingChanged && !allFinal) {
1516 // adding path segments changes order
1519 LYXERR(Debug::GUI, "updateTabTexts() iteration start");
1520 somethingChanged = false;
1523 // find segments which are not unique (i.e. non-atomic)
1524 It it = paths.begin();
1526 QString segString = it->displayString();
1527 for (; it != paths.end(); ++it) {
1528 // look to the next item
1533 allFinal = allFinal && it->final();
1535 LYXERR(Debug::GUI, "it = " << it->abs()
1536 << " => " << it->displayString());
1538 // still the same segment?
1540 if ((next != paths.end()
1541 && (nextString = next->displayString()) == segString))
1543 LYXERR(Debug::GUI, "segment ended");
1545 // only a trivial one with one element?
1546 if (it == segStart) {
1547 // start new segment
1549 segString = nextString;
1553 // we found a non-atomic segment segStart <= sit <= it < next.
1554 // Shift path segments and hope for the best
1555 // that it makes the path more unique.
1556 somethingChanged = true;
1558 QString dspString = sit->forecastPathString();
1559 LYXERR(Debug::GUI, "first forecast found for "
1560 << sit->abs() << " => " << dspString);
1562 bool moreUnique = false;
1563 for (; sit != next; ++sit) {
1564 if (sit->forecastPathString() != dspString) {
1565 LYXERR(Debug::GUI, "different forecast found for "
1566 << sit->abs() << " => " << sit->forecastPathString());
1570 LYXERR(Debug::GUI, "same forecast found for "
1571 << sit->abs() << " => " << dspString);
1574 // if the path segment helped, add it. Otherwise add dots
1575 bool dots = !moreUnique;
1576 LYXERR(Debug::GUI, "using dots = " << dots);
1577 for (sit = segStart; sit != next; ++sit) {
1578 sit->shiftPathSegment(dots);
1579 LYXERR(Debug::GUI, "shifting "
1580 << sit->abs() << " => " << sit->displayString());
1583 // start new segment
1585 segString = nextString;
1589 // set new tab titles
1590 for (It it = paths.begin(); it != paths.end(); ++it) {
1591 GuiWorkArea * i_wa = dynamic_cast<GuiWorkArea *>(widget(it->tab()));
1592 Buffer & buf = i_wa->bufferView().buffer();
1593 if (!buf.fileName().empty() && !buf.isClean())
1594 setTabText(it->tab(), it->displayString() + "*");
1596 setTabText(it->tab(), it->displayString());
1601 void TabWorkArea::showContextMenu(const QPoint & pos)
1604 clicked_tab_ = static_cast<DragTabBar *>(tabBar())->tabAt(pos);
1605 if (clicked_tab_ == -1)
1610 popup.addAction(QIcon(":/images/hidetab.png"),
1611 qt_("Hide tab"), this, SLOT(closeCurrentTab()));
1612 popup.addAction(QIcon(":/images/closetab.png"),
1613 qt_("Close tab"), this, SLOT(closeCurrentBuffer()));
1614 popup.exec(tabBar()->mapToGlobal(pos));
1620 void TabWorkArea::moveTab(int fromIndex, int toIndex)
1622 QWidget * w = widget(fromIndex);
1623 QIcon icon = tabIcon(fromIndex);
1624 QString text = tabText(fromIndex);
1626 setCurrentIndex(fromIndex);
1627 removeTab(fromIndex);
1628 insertTab(toIndex, w, icon, text);
1629 setCurrentIndex(toIndex);
1633 DragTabBar::DragTabBar(QWidget* parent)
1636 setAcceptDrops(true);
1640 #if QT_VERSION < 0x040300
1641 int DragTabBar::tabAt(QPoint const & position) const
1643 const int max = count();
1644 for (int i = 0; i < max; ++i) {
1645 if (tabRect(i).contains(position))
1653 void DragTabBar::mousePressEvent(QMouseEvent * event)
1655 if (event->button() == Qt::LeftButton)
1656 dragStartPos_ = event->pos();
1657 QTabBar::mousePressEvent(event);
1661 void DragTabBar::mouseMoveEvent(QMouseEvent * event)
1663 // If the left button isn't pressed anymore then return
1664 if (!(event->buttons() & Qt::LeftButton))
1667 // If the distance is too small then return
1668 if ((event->pos() - dragStartPos_).manhattanLength()
1669 < QApplication::startDragDistance())
1672 // did we hit something after all?
1673 int tab = tabAt(dragStartPos_);
1677 // simulate button release to remove highlight from button
1678 int i = currentIndex();
1679 QMouseEvent me(QEvent::MouseButtonRelease, dragStartPos_,
1680 event->button(), event->buttons(), 0);
1681 QTabBar::mouseReleaseEvent(&me);
1685 QDrag * drag = new QDrag(this);
1686 QMimeData * mimeData = new QMimeData;
1687 // a crude way to distinguish tab-reodering drops from other ones
1688 mimeData->setData("action", "tab-reordering") ;
1689 drag->setMimeData(mimeData);
1691 #if QT_VERSION >= 0x040300
1692 // get tab pixmap as cursor
1693 QRect r = tabRect(tab);
1694 QPixmap pixmap(r.size());
1695 render(&pixmap, - r.topLeft());
1696 drag->setPixmap(pixmap);
1699 drag->start(Qt::MoveAction);
1705 void DragTabBar::dragEnterEvent(QDragEnterEvent * event)
1707 // Only accept if it's an tab-reordering request
1708 QMimeData const * m = event->mimeData();
1709 QStringList formats = m->formats();
1710 if (formats.contains("action")
1711 && m->data("action") == "tab-reordering")
1712 event->acceptProposedAction();
1716 void DragTabBar::dropEvent(QDropEvent * event)
1718 int fromIndex = tabAt(dragStartPos_);
1719 int toIndex = tabAt(event->pos());
1721 // Tell interested objects that
1722 if (fromIndex != toIndex)
1723 tabMoveRequested(fromIndex, toIndex);
1724 event->acceptProposedAction();
1728 } // namespace frontend
1731 #include "GuiWorkArea_moc.cpp"