src/frontends/qt4/GuiWorkArea.cpp

   1 /**
   2  * \file GuiWorkArea.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author John Levon
   7  * \author Abdelrazak Younes
   8  *
   9  * Full author contact details are available in file CREDITS.
  10  */
  11
  12 #include <config.h>
  13
  14 #include "GuiWorkArea.h"
  15
  16 #include "GuiApplication.h"
  17 #include "GuiPainter.h"
  18 #include "GuiKeySymbol.h"
  19 #include "qt_helpers.h"
  20
  21 #include "frontends/LyXView.h"
  22
  23 #include "BufferView.h"
  24 #include "Color.h"
  25 #include "debug.h"
  26 #include "FuncRequest.h"
  27 #include "LyXRC.h"
  28 #include "version.h"
  29
  30 #include "support/filetools.h" // LibFileSearch
  31
  32 #include "graphics/GraphicsImage.h"
  33 #include "graphics/GraphicsLoader.h"
  34
  35 #include <QInputContext>
  36 #include <QLayout>
  37 #include <QMainWindow>
  38 #include <QPainter>
  39 #include <QScrollBar>
  40 #include <QTimer>
  41
  42 #include <boost/bind.hpp>
  43 #include <boost/current_function.hpp>
  44
  45 #ifdef Q_WS_X11
  46 #include <QX11Info>
  47 extern "C" int XEventsQueued(Display *display, int mode);
  48 #endif
  49
  50 #ifdef Q_WS_WIN
  51 int const CursorWidth = 2;
  52 #else
  53 int const CursorWidth = 1;
  54 #endif
  55
  56 #undef KeyPress
  57 #undef NoModifier
  58
  59 using std::endl;
  60 using std::string;
  61
  62 namespace lyx {
  63
  64 using support::FileName;
  65
  66 /// return the LyX mouse button state from Qt's
  67 static mouse_button::state q_button_state(Qt::MouseButton button)
  68 {
  69         mouse_button::state b = mouse_button::none;
  70         switch (button) {
  71                 case Qt::LeftButton:
  72                         b = mouse_button::button1;
  73                         break;
  74                 case Qt::MidButton:
  75                         b = mouse_button::button2;
  76                         break;
  77                 case Qt::RightButton:
  78                         b = mouse_button::button3;
  79                         break;
  80                 default:
  81                         break;
  82         }
  83         return b;
  84 }
  85
  86
  87 /// return the LyX mouse button state from Qt's
  88 mouse_button::state q_motion_state(Qt::MouseButtons state)
  89 {
  90         mouse_button::state b = mouse_button::none;
  91         if (state & Qt::LeftButton)
  92                 b |= mouse_button::button1;
  93         if (state & Qt::MidButton)
  94                 b |= mouse_button::button2;
  95         if (state & Qt::RightButton)
  96                 b |= mouse_button::button3;
  97         return b;
  98 }
  99
 100
 101 namespace frontend {
 102
 103 class CursorWidget {
 104 public:
 105         CursorWidget() {}
 106
 107         void draw(QPainter & painter)
 108         {
 109                 if (show_ && rect_.isValid()) {
 110                         switch (shape_) {
 111                         case L_SHAPE:
 112                                 painter.fillRect(rect_.x(), rect_.y(), CursorWidth, rect_.height(), color_);
 113                                 painter.setPen(color_);
 114                                 painter.drawLine(rect_.bottomLeft().x() + CursorWidth, rect_.bottomLeft().y(),
 115                                                                                                  rect_.bottomRight().x(), rect_.bottomLeft().y());
 116                                 break;
 117
 118                         case REVERSED_L_SHAPE:
 119                                 painter.fillRect(rect_.x() + rect_.height() / 3, rect_.y(), CursorWidth, rect_.height(), color_);
 120                                 painter.setPen(color_);
 121                                 painter.drawLine(rect_.bottomRight().x() - CursorWidth, rect_.bottomLeft().y(),
 122                                                                                                          rect_.bottomLeft().x(), rect_.bottomLeft().y());
 123                                 break;
 124
 125                         default:
 126                                 painter.fillRect(rect_, color_);
 127                                 break;
 128                         }
 129                 }
 130         }
 131
 132         void update(int x, int y, int h, CursorShape shape)
 133         {
 134                 color_ = guiApp->colorCache().get(Color::cursor);
 135                 shape_ = shape;
 136                 switch (shape) {
 137                 case L_SHAPE:
 138                         rect_ = QRect(x, y, CursorWidth + h / 3, h);
 139                         break;
 140                 case REVERSED_L_SHAPE:
 141                         rect_ = QRect(x - h / 3, y, CursorWidth + h / 3, h);
 142                         break;
 143                 default:
 144                         rect_ = QRect(x, y, CursorWidth, h);
 145                         break;
 146                 }
 147         }
 148
 149         void show(bool set_show = true) { show_ = set_show; }
 150         void hide() { show_ = false; }
 151
 152         QRect const & rect() { return rect_; }
 153
 154 private:
 155         ///
 156         CursorShape shape_;
 157         ///
 158         bool show_;
 159         ///
 160         QColor color_;
 161         ///
 162         QRect rect_;
 163 };
 164
 165
 166 // This is a 'heartbeat' generating synthetic mouse move events when the
 167 // cursor is at the top or bottom edge of the viewport. One scroll per 0.2 s
 168 SyntheticMouseEvent::SyntheticMouseEvent()
 169         : timeout(200), restart_timeout(true),
 170           x_old(-1), y_old(-1), scrollbar_value_old(-1.0)
 171 {}
 172
 173
 174 GuiWorkArea::GuiWorkArea(Buffer & buf, LyXView & lv)
 175         : WorkArea(buf, lv), need_resize_(false), schedule_redraw_(false),
 176           preedit_lines_(1)
 177 {
 178         screen_ = QPixmap(viewport()->width(), viewport()->height());
 179         cursor_ = new frontend::CursorWidget();
 180         cursor_->hide();
 181
 182         setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
 183         setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
 184         setAcceptDrops(true);
 185         setMouseTracking(true);
 186         setMinimumSize(100, 70);
 187
 188         viewport()->setAutoFillBackground(false);
 189         // We don't need double-buffering nor SystemBackground on
 190         // the viewport because we have our own backing pixmap.
 191         viewport()->setAttribute(Qt::WA_NoSystemBackground);
 192
 193         setFocusPolicy(Qt::WheelFocus);
 194
 195         viewport()->setCursor(Qt::IBeamCursor);
 196
 197         synthetic_mouse_event_.timeout.timeout.connect(
 198                 boost::bind(&GuiWorkArea::generateSyntheticMouseEvent,
 199                             this));
 200
 201         // Initialize the vertical Scroll Bar
 202         QObject::connect(verticalScrollBar(), SIGNAL(actionTriggered(int)),
 203                 this, SLOT(adjustViewWithScrollBar(int)));
 204
 205         // disable context menu for the scrollbar
 206         verticalScrollBar()->setContextMenuPolicy(Qt::NoContextMenu);
 207
 208         // PageStep only depends on the viewport height.
 209         verticalScrollBar()->setPageStep(viewport()->height());
 210
 211         LYXERR(Debug::GUI) << BOOST_CURRENT_FUNCTION
 212                 << "\n Area width\t" << width()
 213                 << "\n Area height\t" << height()
 214                 << "\n viewport width\t" << viewport()->width()
 215                 << "\n viewport height\t" << viewport()->height()
 216                 << endl;
 217
 218         // Enables input methods for asian languages.
 219         // Must be set when creating custom text editing widgets.
 220         setAttribute(Qt::WA_InputMethodEnabled, true);
 221 }
 222
 223
 224 void GuiWorkArea::setScrollbarParams(int h, int scroll_pos, int scroll_line_step)
 225 {
 226         if (verticalScrollBarPolicy() != Qt::ScrollBarAlwaysOn)
 227                 setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
 228
 229         verticalScrollBar()->setTracking(false);
 230
 231         // do what cursor movement does (some grey)
 232         h += height() / 4;
 233         int scroll_max_ = std::max(0, h - height());
 234
 235         verticalScrollBar()->setRange(0, scroll_max_);
 236         verticalScrollBar()->setSliderPosition(scroll_pos);
 237         verticalScrollBar()->setSingleStep(scroll_line_step);
 238         verticalScrollBar()->setValue(scroll_pos);
 239
 240         verticalScrollBar()->setTracking(true);
 241 }
 242
 243
 244 void GuiWorkArea::adjustViewWithScrollBar(int)
 245 {
 246         scrollBufferView(verticalScrollBar()->sliderPosition());
 247         QApplication::syncX();
 248 }
 249
 250
 251 void GuiWorkArea::focusInEvent(QFocusEvent * /*event*/)
 252 {
 253         // No need to do anything if we didn't change views...
 254 //      if (theApp() == 0 || &lyx_view_ == theApp()->currentView())
 255 //              return;
 256
 257         theApp()->setCurrentView(*lyx_view_);
 258
 259         // Repaint the whole screen.
 260         // Note: this is different from redraw() as only the backing pixmap
 261         // will be redrawn, which is cheap.
 262         viewport()->repaint();
 263
 264         startBlinkingCursor();
 265 }
 266
 267
 268 void GuiWorkArea::focusOutEvent(QFocusEvent * /*event*/)
 269 {
 270         stopBlinkingCursor();
 271 }
 272
 273
 274 void GuiWorkArea::mousePressEvent(QMouseEvent * e)
 275 {
 276         if (dc_event_.active && dc_event_ == *e) {
 277                 dc_event_.active = false;
 278                 FuncRequest cmd(LFUN_MOUSE_TRIPLE,
 279                         e->x(), e->y(),
 280                         q_button_state(e->button()));
 281                 dispatch(cmd);
 282                 return;
 283         }
 284
 285         inputContext()->reset();
 286
 287         FuncRequest const cmd(LFUN_MOUSE_PRESS, e->x(), e->y(),
 288                 q_button_state(e->button()));
 289         dispatch(cmd, q_key_state(e->modifiers()));
 290 }
 291
 292
 293 void GuiWorkArea::mouseReleaseEvent(QMouseEvent * e)
 294 {
 295         if (synthetic_mouse_event_.timeout.running())
 296                 synthetic_mouse_event_.timeout.stop();
 297
 298         FuncRequest const cmd(LFUN_MOUSE_RELEASE, e->x(), e->y(),
 299                               q_button_state(e->button()));
 300         dispatch(cmd);
 301 }
 302
 303
 304 void GuiWorkArea::mouseMoveEvent(QMouseEvent * e)
 305 {
 306         // we kill the triple click if we move
 307         doubleClickTimeout();
 308         FuncRequest cmd(LFUN_MOUSE_MOTION, e->x(), e->y(),
 309                               q_motion_state(e->buttons()));
 310
 311         // If we're above or below the work area...
 312         if (e->y() <= 20 || e->y() >= viewport()->height() - 20) {
 313                 // Make sure only a synthetic event can cause a page scroll,
 314                 // so they come at a steady rate:
 315                 if (e->y() <= 20)
 316                         // _Force_ a scroll up:
 317                         cmd.y = -40;
 318                 else
 319                         cmd.y = viewport()->height();
 320                 // Store the event, to be handled when the timeout expires.
 321                 synthetic_mouse_event_.cmd = cmd;
 322
 323                 if (synthetic_mouse_event_.timeout.running())
 324                         // Discard the event. Note that it _may_ be handled
 325                         // when the timeout expires if
 326                         // synthetic_mouse_event_.cmd has not been overwritten.
 327                         // Ie, when the timeout expires, we handle the
 328                         // most recent event but discard all others that
 329                         // occurred after the one used to start the timeout
 330                         // in the first place.
 331                         return;
 332                 else {
 333                         synthetic_mouse_event_.restart_timeout = true;
 334                         synthetic_mouse_event_.timeout.start();
 335                         // Fall through to handle this event...
 336                 }
 337
 338         } else if (synthetic_mouse_event_.timeout.running()) {
 339                 // Store the event, to be possibly handled when the timeout
 340                 // expires.
 341                 // Once the timeout has expired, normal control is returned
 342                 // to mouseMoveEvent (restart_timeout = false).
 343                 // This results in a much smoother 'feel' when moving the
 344                 // mouse back into the work area.
 345                 synthetic_mouse_event_.cmd = cmd;
 346                 synthetic_mouse_event_.restart_timeout = false;
 347                 return;
 348         }
 349
 350         // Has anything changed on-screen since the last QMouseEvent
 351         // was received?
 352         double const scrollbar_value = verticalScrollBar()->value();
 353         if (e->x() != synthetic_mouse_event_.x_old ||
 354             e->y() != synthetic_mouse_event_.y_old ||
 355             scrollbar_value != synthetic_mouse_event_.scrollbar_value_old) {
 356                 // Yes it has. Store the params used to check this.
 357                 synthetic_mouse_event_.x_old = e->x();
 358                 synthetic_mouse_event_.y_old = e->y();
 359                 synthetic_mouse_event_.scrollbar_value_old = scrollbar_value;
 360
 361                 // ... and dispatch the event to the LyX core.
 362                 dispatch(cmd);
 363         }
 364 }
 365
 366
 367 void GuiWorkArea::wheelEvent(QWheelEvent * e)
 368 {
 369         // Wheel rotation by one notch results in a delta() of 120 (see
 370         // documentation of QWheelEvent)
 371         int const lines = qApp->wheelScrollLines() * e->delta() / 120;
 372         verticalScrollBar()->setValue(verticalScrollBar()->value() -
 373                         lines *  verticalScrollBar()->singleStep());
 374         adjustViewWithScrollBar();
 375 }
 376
 377
 378 void GuiWorkArea::generateSyntheticMouseEvent()
 379 {
 380 // Set things off to generate the _next_ 'pseudo' event.
 381         if (synthetic_mouse_event_.restart_timeout)
 382                 synthetic_mouse_event_.timeout.start();
 383
 384         // Has anything changed on-screen since the last timeout signal
 385         // was received?
 386         double const scrollbar_value = verticalScrollBar()->value();
 387         if (scrollbar_value != synthetic_mouse_event_.scrollbar_value_old) {
 388                 // Yes it has. Store the params used to check this.
 389                 synthetic_mouse_event_.scrollbar_value_old = scrollbar_value;
 390
 391                 // ... and dispatch the event to the LyX core.
 392                 dispatch(synthetic_mouse_event_.cmd);
 393         }
 394 }
 395
 396
 397 void GuiWorkArea::keyPressEvent(QKeyEvent * e)
 398 {
 399         // do nothing if there are other events
 400         // (the auto repeated events come too fast)
 401         // \todo FIXME: remove hard coded Qt keys, process the key binding
 402 #ifdef Q_WS_X11
 403         if (XEventsQueued(QX11Info::display(), 0) > 1 && e->isAutoRepeat()
 404                         && (Qt::Key_PageDown || Qt::Key_PageUp)) {
 405                 LYXERR(Debug::KEY)
 406                         << BOOST_CURRENT_FUNCTION << endl
 407                         << "system is busy: scroll key event ignored" << endl;
 408                 e->ignore();
 409                 return;
 410         }
 411 #endif
 412
 413         LYXERR(Debug::KEY) << BOOST_CURRENT_FUNCTION
 414                 << " count=" << e->count()
 415                 << " text=" << fromqstr(e->text())
 416                 << " isAutoRepeat=" << e->isAutoRepeat()
 417                 << " key=" << e->key()
 418                 << endl;
 419
 420         boost::shared_ptr<GuiKeySymbol> sym(new GuiKeySymbol);
 421         sym->set(e);
 422         processKeySym(sym, q_key_state(e->modifiers()));
 423 }
 424
 425
 426 void GuiWorkArea::doubleClickTimeout()
 427 {
 428         dc_event_.active = false;
 429 }
 430
 431
 432 void GuiWorkArea::mouseDoubleClickEvent(QMouseEvent * e)
 433 {
 434         dc_event_ = double_click(e);
 435         QTimer::singleShot(QApplication::doubleClickInterval(), this,
 436                            SLOT(doubleClickTimeout()));
 437         FuncRequest cmd(LFUN_MOUSE_DOUBLE,
 438                         e->x(), e->y(),
 439                         q_button_state(e->button()));
 440         dispatch(cmd);
 441 }
 442
 443
 444 void GuiWorkArea::resizeEvent(QResizeEvent * ev)
 445 {
 446         QAbstractScrollArea::resizeEvent(ev);
 447         need_resize_ = true;
 448 }
 449
 450
 451 void GuiWorkArea::update(int x, int y, int w, int h)
 452 {
 453         viewport()->repaint(x, y, w, h);
 454 }
 455
 456
 457 void GuiWorkArea::paintEvent(QPaintEvent * ev)
 458 {
 459         QRect const rc = ev->rect();
 460         /*
 461         LYXERR(Debug::PAINTING) << "paintEvent begin: x: " << rc.x()
 462                 << " y: " << rc.y()
 463                 << " w: " << rc.width()
 464                 << " h: " << rc.height() << endl;
 465         */
 466
 467         if (need_resize_) {
 468                 verticalScrollBar()->setPageStep(viewport()->height());
 469                 screen_ = QPixmap(viewport()->width(), viewport()->height());
 470                 resizeBufferView();
 471                 updateScreen();
 472                 WorkArea::hideCursor();
 473                 WorkArea::showCursor();
 474                 need_resize_ = false;
 475         }
 476
 477         QPainter pain(viewport());
 478         pain.drawPixmap(rc, screen_, rc);
 479         cursor_->draw(pain);
 480 }
 481
 482
 483 void GuiWorkArea::expose(int x, int y, int w, int h)
 484 {
 485         updateScreen();
 486         update(x, y, w, h);
 487 }
 488
 489
 490 void GuiWorkArea::updateScreen()
 491 {
 492         GuiPainter pain(&screen_);
 493         verticalScrollBar()->show();
 494         buffer_view_->draw(pain);
 495 }
 496
 497
 498 void GuiWorkArea::showCursor(int x, int y, int h, CursorShape shape)
 499 {
 500         if (schedule_redraw_) {
 501                 buffer_view_->update(Update::Force);
 502                 updateScreen();
 503                 viewport()->update(QRect(0, 0, viewport()->width(), viewport()->height()));
 504                 schedule_redraw_ = false;
 505                 // Show the cursor immediately after the update.
 506                 hideCursor();
 507                 toggleCursor();
 508                 return;
 509         }
 510
 511         cursor_->update(x, y, h, shape);
 512         cursor_->show();
 513         viewport()->update(cursor_->rect());
 514 }
 515
 516
 517 void GuiWorkArea::removeCursor()
 518 {
 519         cursor_->hide();
 520         //if (!qApp->focusWidget())
 521                 viewport()->update(cursor_->rect());
 522 }
 523
 524
 525 void GuiWorkArea::inputMethodEvent(QInputMethodEvent * e)
 526 {
 527         QString const & commit_string = e->commitString();
 528         docstring const & preedit_string
 529                 = qstring_to_ucs4(e->preeditString());
 530
 531         if (!commit_string.isEmpty()) {
 532
 533                 LYXERR(Debug::KEY) << BOOST_CURRENT_FUNCTION
 534                         << " preeditString =" << fromqstr(e->preeditString())
 535                         << " commitString  =" << fromqstr(e->commitString())
 536                         << endl;
 537
 538                 int key = 0;
 539
 540                 // FIXME Iwami 04/01/07: we should take care also of UTF16 surrogates here.
 541                 for (int i = 0; i < commit_string.size(); ++i) {
 542                         QKeyEvent ev(QEvent::KeyPress, key, Qt::NoModifier, commit_string[i]);
 543                         keyPressEvent(&ev);
 544                 }
 545         }
 546
 547         // Hide the cursor during the kana-kanji transformation.
 548         if (preedit_string.empty())
 549                 startBlinkingCursor();
 550         else
 551                 stopBlinkingCursor();
 552
 553         // last_width : for checking if last preedit string was/wasn't empty.
 554         static bool last_width = false;
 555         if (!last_width && preedit_string.empty()) {
 556                 // if last_width is last length of preedit string.
 557                 e->accept();
 558                 return;
 559         }
 560
 561         GuiPainter pain(&screen_);
 562         buffer_view_->updateMetrics(false);
 563         buffer_view_->draw(pain);
 564         Font font = buffer_view_->cursor().getFont();
 565         FontMetrics const & fm = theFontMetrics(font);
 566         int height = fm.maxHeight();
 567         int cur_x = cursor_->rect().left();
 568         int cur_y = cursor_->rect().bottom();
 569
 570         // redraw area of preedit string.
 571         update(0, cur_y - height, GuiWorkArea::width(),
 572                 (height + 1) * preedit_lines_);
 573
 574         if (preedit_string.empty()) {
 575                 last_width = false;
 576                 preedit_lines_ = 1;
 577                 e->accept();
 578                 return;
 579         }
 580         last_width = true;
 581
 582         // att : stores an IM attribute.
 583         QList<QInputMethodEvent::Attribute> const & att = e->attributes();
 584
 585         // get attributes of input method cursor.
 586         // cursor_pos : cursor position in preedit string.
 587         size_t cursor_pos = 0;
 588         bool cursor_is_visible = false;
 589         for (int i = 0; i < att.size(); ++i) {
 590                 if (att.at(i).type == QInputMethodEvent::Cursor) {
 591                         cursor_pos = att.at(i).start;
 592                         cursor_is_visible = att.at(i).length != 0;
 593                         break;
 594                 }
 595         }
 596
 597         size_t preedit_length = preedit_string.length();
 598
 599         // get position of selection in input method.
 600         // FIXME: isn't there a way to do this simplier?
 601         // rStart : cursor position in selected string in IM.
 602         size_t rStart = 0;
 603         // rLength : selected string length in IM.
 604         size_t rLength = 0;
 605         if (cursor_pos < preedit_length) {
 606                 for (int i = 0; i < att.size(); ++i) {
 607                         if (att.at(i).type == QInputMethodEvent::TextFormat) {
 608                                 if (att.at(i).start <= int(cursor_pos)
 609                                         && int(cursor_pos) < att.at(i).start + att.at(i).length) {
 610                                                 rStart = att.at(i).start;
 611                                                 rLength = att.at(i).length;
 612                                                 if (!cursor_is_visible)
 613                                                         cursor_pos += rLength;
 614                                                 break;
 615                                 }
 616                         }
 617                 }
 618         }
 619         else {
 620                 rStart = cursor_pos;
 621                 rLength = 0;
 622         }
 623
 624         int const right_margin = rightMargin();
 625         Painter::preedit_style ps;
 626         // Most often there would be only one line:
 627         preedit_lines_ = 1;
 628         for (size_t pos = 0; pos != preedit_length; ++pos) {
 629                 char_type const typed_char = preedit_string[pos];
 630                 // reset preedit string style
 631                 ps = Painter::preedit_default;
 632
 633                 // if we reached the right extremity of the screen, go to next line.
 634                 if (cur_x + fm.width(typed_char) > GuiWorkArea::width() - right_margin) {
 635                         cur_x = right_margin;
 636                         cur_y += height + 1;
 637                         ++preedit_lines_;
 638                 }
 639                 // preedit strings are displayed with dashed underline
 640                 // and partial strings are displayed white on black indicating
 641                 // that we are in selecting mode in the input method.
 642                 // FIXME: rLength == preedit_length is not a changing condition
 643                 // FIXME: should be put out of the loop.
 644                 if (pos >= rStart
 645                         && pos < rStart + rLength
 646                         && !(cursor_pos < rLength && rLength == preedit_length))
 647                         ps = Painter::preedit_selecting;
 648
 649                 if (pos == cursor_pos
 650                         && (cursor_pos < rLength && rLength == preedit_length))
 651                         ps = Painter::preedit_cursor;
 652
 653                 // draw one character and update cur_x.
 654                 cur_x += pain.preeditText(cur_x, cur_y, typed_char, font, ps);
 655         }
 656
 657         // update the preedit string screen area.
 658         update(0, cur_y - preedit_lines_*height, GuiWorkArea::width(),
 659                 (height + 1) * preedit_lines_);
 660
 661         // Don't forget to accept the event!
 662         e->accept();
 663 }
 664
 665
 666 QVariant GuiWorkArea::inputMethodQuery(Qt::InputMethodQuery query) const
 667 {
 668         QRect cur_r(0,0,0,0);
 669         switch (query) {
 670                 // this is the CJK-specific composition window position.
 671                 case Qt::ImMicroFocus:
 672                         cur_r = cursor_->rect();
 673                         if (preedit_lines_ != 1)
 674                                 cur_r.moveLeft(10);
 675                         cur_r.moveBottom(cur_r.bottom() + cur_r.height() * preedit_lines_);
 676                         // return lower right of cursor in LyX.
 677                         return cur_r;
 678                 default:
 679                         return QWidget::inputMethodQuery(query);
 680         }
 681 }
 682
 683 } // namespace frontend
 684 } // namespace lyx
 685
 686 #include "GuiWorkArea_moc.cpp"