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