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 "Buffer.h"
  17 #include "BufferParams.h"
  18 #include "BufferView.h"
  19 #include "CoordCache.h"
  20 #include "Cursor.h"
  21 #include "Font.h"
  22 #include "FuncRequest.h"
  23 #include "GuiApplication.h"
  24 #include "GuiKeySymbol.h"
  25 #include "GuiPainter.h"
  26 #include "GuiPopupMenu.h"
  27 #include "GuiView.h"
  28 #include "KeySymbol.h"
  29 #include "Language.h"
  30 #include "LyXFunc.h"
  31 #include "LyXRC.h"
  32 #include "MetricsInfo.h"
  33 #include "qt_helpers.h"
  34 #include "version.h"
  35
  36 #include "graphics/GraphicsImage.h"
  37 #include "graphics/GraphicsLoader.h"
  38
  39 #include "support/debug.h"
  40 #include "support/gettext.h"
  41 #include "support/FileName.h"
  42 #include "support/ForkedCalls.h"
  43
  44 #include "frontends/Application.h"
  45 #include "frontends/FontMetrics.h"
  46 #include "frontends/WorkAreaManager.h"
  47
  48 #include <QContextMenuEvent>
  49 #include <QInputContext>
  50 #include <QHelpEvent>
  51 #include <QLayout>
  52 #include <QMainWindow>
  53 #include <QPainter>
  54 #include <QPalette>
  55 #include <QScrollBar>
  56 #include <QTabBar>
  57 #include <QTimer>
  58 #include <QToolButton>
  59 #include <QToolTip>
  60
  61 #include <boost/bind.hpp>
  62
  63 #ifdef Q_WS_X11
  64 #include <QX11Info>
  65 extern "C" int XEventsQueued(Display *display, int mode);
  66 #endif
  67
  68 #ifdef Q_WS_WIN
  69 int const CursorWidth = 2;
  70 #else
  71 int const CursorWidth = 1;
  72 #endif
  73
  74 #undef KeyPress
  75 #undef NoModifier
  76
  77 using namespace std;
  78 using namespace lyx::support;
  79
  80 namespace lyx {
  81
  82
  83 /// return the LyX mouse button state from Qt's
  84 static mouse_button::state q_button_state(Qt::MouseButton button)
  85 {
  86         mouse_button::state b = mouse_button::none;
  87         switch (button) {
  88                 case Qt::LeftButton:
  89                         b = mouse_button::button1;
  90                         break;
  91                 case Qt::MidButton:
  92                         b = mouse_button::button2;
  93                         break;
  94                 case Qt::RightButton:
  95                         b = mouse_button::button3;
  96                         break;
  97                 default:
  98                         break;
  99         }
 100         return b;
 101 }
 102
 103
 104 /// return the LyX mouse button state from Qt's
 105 mouse_button::state q_motion_state(Qt::MouseButtons state)
 106 {
 107         mouse_button::state b = mouse_button::none;
 108         if (state & Qt::LeftButton)
 109                 b |= mouse_button::button1;
 110         if (state & Qt::MidButton)
 111                 b |= mouse_button::button2;
 112         if (state & Qt::RightButton)
 113                 b |= mouse_button::button3;
 114         return b;
 115 }
 116
 117
 118 namespace frontend {
 119
 120 class CursorWidget {
 121 public:
 122         CursorWidget() {}
 123
 124         void draw(QPainter & painter)
 125         {
 126                 if (show_ && rect_.isValid()) {
 127                         switch (shape_) {
 128                         case L_SHAPE:
 129                                 painter.fillRect(rect_.x(), rect_.y(), CursorWidth, rect_.height(), color_);
 130                                 painter.setPen(color_);
 131                                 painter.drawLine(rect_.bottomLeft().x() + CursorWidth, rect_.bottomLeft().y(),
 132                                                                                                  rect_.bottomRight().x(), rect_.bottomLeft().y());
 133                                 break;
 134
 135                         case REVERSED_L_SHAPE:
 136                                 painter.fillRect(rect_.x() + rect_.height() / 3, rect_.y(), CursorWidth, rect_.height(), color_);
 137                                 painter.setPen(color_);
 138                                 painter.drawLine(rect_.bottomRight().x() - CursorWidth, rect_.bottomLeft().y(),
 139                                                                                                          rect_.bottomLeft().x(), rect_.bottomLeft().y());
 140                                 break;
 141
 142                         default:
 143                                 painter.fillRect(rect_, color_);
 144                                 break;
 145                         }
 146                 }
 147         }
 148
 149         void update(int x, int y, int h, CursorShape shape)
 150         {
 151                 color_ = guiApp->colorCache().get(Color_cursor);
 152                 shape_ = shape;
 153                 switch (shape) {
 154                 case L_SHAPE:
 155                         rect_ = QRect(x, y, CursorWidth + h / 3, h);
 156                         break;
 157                 case REVERSED_L_SHAPE:
 158                         rect_ = QRect(x - h / 3, y, CursorWidth + h / 3, h);
 159                         break;
 160                 default:
 161                         rect_ = QRect(x, y, CursorWidth, h);
 162                         break;
 163                 }
 164         }
 165
 166         void show(bool set_show = true) { show_ = set_show; }
 167         void hide() { show_ = false; }
 168
 169         QRect const & rect() { return rect_; }
 170
 171 private:
 172         ///
 173         CursorShape shape_;
 174         ///
 175         bool show_;
 176         ///
 177         QColor color_;
 178         ///
 179         QRect rect_;
 180 };
 181
 182
 183 // This is a 'heartbeat' generating synthetic mouse move events when the
 184 // cursor is at the top or bottom edge of the viewport. One scroll per 0.2 s
 185 SyntheticMouseEvent::SyntheticMouseEvent()
 186         : timeout(200), restart_timeout(true),
 187           x_old(-1), y_old(-1), scrollbar_value_old(-1.0)
 188 {}
 189
 190
 191
 192 GuiWorkArea::GuiWorkArea(Buffer & buffer, GuiView & lv)
 193         : buffer_view_(new BufferView(buffer)), lyx_view_(&lv),
 194           cursor_visible_(false),
 195     need_resize_(false), schedule_redraw_(false),
 196                 preedit_lines_(1)
 197 {
 198         buffer.workAreaManager().add(this);
 199         // Setup the signals
 200         cursor_timeout_.setInterval(400);
 201         connect(&cursor_timeout_, SIGNAL(timeout()),
 202                 this, SLOT(toggleCursor()));
 203
 204         cursor_timeout_.start();
 205
 206         screen_ = QPixmap(viewport()->width(), viewport()->height());
 207         cursor_ = new frontend::CursorWidget();
 208         cursor_->hide();
 209
 210         setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
 211         setAcceptDrops(true);
 212         setMouseTracking(true);
 213         setMinimumSize(100, 70);
 214         updateWindowTitle();
 215
 216         viewport()->setAutoFillBackground(false);
 217         // We don't need double-buffering nor SystemBackground on
 218         // the viewport because we have our own backing pixmap.
 219         viewport()->setAttribute(Qt::WA_NoSystemBackground);
 220
 221         setFocusPolicy(Qt::WheelFocus);
 222
 223         viewport()->setCursor(Qt::IBeamCursor);
 224
 225         synthetic_mouse_event_.timeout.timeout.connect(
 226                 boost::bind(&GuiWorkArea::generateSyntheticMouseEvent,
 227                                         this));
 228
 229         // Initialize the vertical Scroll Bar
 230         QObject::connect(verticalScrollBar(), SIGNAL(actionTriggered(int)),
 231                 this, SLOT(adjustViewWithScrollBar(int)));
 232
 233         LYXERR(Debug::GUI, "viewport width: " << viewport()->width()
 234                 << "  viewport height: " << viewport()->height());
 235
 236         // Enables input methods for asian languages.
 237         // Must be set when creating custom text editing widgets.
 238         setAttribute(Qt::WA_InputMethodEnabled, true);
 239 }
 240
 241
 242
 243 GuiWorkArea::~GuiWorkArea()
 244 {
 245         buffer_view_->buffer().workAreaManager().remove(this);
 246         delete buffer_view_;
 247         delete cursor_;
 248 }
 249
 250
 251 void GuiWorkArea::close()
 252 {
 253         lyx_view_->removeWorkArea(this);
 254 }
 255
 256
 257 BufferView & GuiWorkArea::bufferView()
 258 {
 259         return *buffer_view_;
 260 }
 261
 262
 263 BufferView const & GuiWorkArea::bufferView() const
 264 {
 265         return *buffer_view_;
 266 }
 267
 268
 269 void GuiWorkArea::stopBlinkingCursor()
 270 {
 271         cursor_timeout_.stop();
 272         hideCursor();
 273 }
 274
 275
 276 void GuiWorkArea::startBlinkingCursor()
 277 {
 278         showCursor();
 279         cursor_timeout_.start();
 280 }
 281
 282
 283 void GuiWorkArea::redraw()
 284 {
 285         if (!isVisible())
 286                 // No need to redraw in this case.
 287                 return;
 288
 289         // No need to do anything if this is the current view. The BufferView
 290         // metrics are already up to date.
 291         if (lyx_view_ != guiApp->currentView()) {
 292                 // FIXME: it would be nice to optimize for the off-screen case.
 293                 buffer_view_->updateMetrics();
 294                 buffer_view_->cursor().fixIfBroken();
 295         }
 296
 297         // update cursor position, because otherwise it has to wait until
 298         // the blinking interval is over
 299         if (cursor_visible_) {
 300                 hideCursor();
 301                 showCursor();
 302         }
 303
 304         LYXERR(Debug::WORKAREA, "WorkArea::redraw screen");
 305         updateScreen();
 306         update(0, 0, viewport()->width(), viewport()->height());
 307
 308         /// \warning: scrollbar updating *must* be done after the BufferView is drawn
 309         /// because \c BufferView::updateScrollbar() is called in \c BufferView::draw().
 310         updateScrollbar();
 311         lyx_view_->updateStatusBar();
 312
 313         if (lyxerr.debugging(Debug::WORKAREA))
 314                 buffer_view_->coordCache().dump();
 315 }
 316
 317
 318 void GuiWorkArea::processKeySym(KeySymbol const & key, KeyModifier mod)
 319 {
 320         // In order to avoid bad surprise in the middle of an operation,
 321         // we better stop the blinking cursor.
 322         stopBlinkingCursor();
 323
 324         theLyXFunc().setLyXView(lyx_view_);
 325         theLyXFunc().processKeySym(key, mod);
 326 }
 327
 328
 329 void GuiWorkArea::dispatch(FuncRequest const & cmd0, KeyModifier mod)
 330 {
 331         // Handle drag&drop
 332         if (cmd0.action == LFUN_FILE_OPEN) {
 333                 lyx_view_->dispatch(cmd0);
 334                 return;
 335         }
 336
 337         theLyXFunc().setLyXView(lyx_view_);
 338
 339         FuncRequest cmd;
 340
 341         if (cmd0.action == LFUN_MOUSE_PRESS) {
 342                 if (mod == ShiftModifier)
 343                         cmd = FuncRequest(cmd0, "region-select");
 344                 else if (mod == ControlModifier)
 345                         cmd = FuncRequest(cmd0, "paragraph-select");
 346                 else
 347                         cmd = cmd0;
 348         }
 349         else
 350                 cmd = cmd0;
 351
 352         // In order to avoid bad surprise in the middle of an operation, we better stop
 353         // the blinking cursor.
 354         if (!(cmd.action == LFUN_MOUSE_MOTION
 355                 && cmd.button() == mouse_button::none))
 356                 stopBlinkingCursor();
 357
 358         buffer_view_->mouseEventDispatch(cmd);
 359
 360         // Skip these when selecting
 361         if (cmd.action != LFUN_MOUSE_MOTION) {
 362                 lyx_view_->updateLayoutList();
 363                 lyx_view_->updateToolbars();
 364         }
 365
 366         // GUI tweaks except with mouse motion with no button pressed.
 367         if (!(cmd.action == LFUN_MOUSE_MOTION
 368                 && cmd.button() == mouse_button::none)) {
 369                 // Slight hack: this is only called currently when we
 370                 // clicked somewhere, so we force through the display
 371                 // of the new status here.
 372                 lyx_view_->clearMessage();
 373
 374                 // Show the cursor immediately after any operation.
 375                 startBlinkingCursor();
 376         }
 377 }
 378
 379
 380 void GuiWorkArea::resizeBufferView()
 381 {
 382         // WARNING: Please don't put any code that will trigger a repaint here!
 383         // We are already inside a paint event.
 384         lyx_view_->setBusy(true);
 385         buffer_view_->resize(viewport()->width(), viewport()->height());
 386         lyx_view_->updateLayoutList();
 387         lyx_view_->setBusy(false);
 388         need_resize_ = false;
 389 }
 390
 391
 392 void GuiWorkArea::showCursor()
 393 {
 394         if (cursor_visible_)
 395                 return;
 396
 397         CursorShape shape = BAR_SHAPE;
 398
 399         Font const & realfont = buffer_view_->cursor().real_current_font;
 400         BufferParams const & bp = buffer_view_->buffer().params();
 401         bool const samelang = realfont.language() == bp.language;
 402         bool const isrtl = realfont.isVisibleRightToLeft();
 403
 404         if (!samelang || isrtl != bp.language->rightToLeft()) {
 405                 shape = L_SHAPE;
 406                 if (isrtl)
 407                         shape = REVERSED_L_SHAPE;
 408         }
 409
 410         // The ERT language hack needs fixing up
 411         if (realfont.language() == latex_language)
 412                 shape = BAR_SHAPE;
 413
 414         Font const font = buffer_view_->cursor().getFont();
 415         FontMetrics const & fm = theFontMetrics(font);
 416         int const asc = fm.maxAscent();
 417         int const des = fm.maxDescent();
 418         int h = asc + des;
 419         int x = 0;
 420         int y = 0;
 421         buffer_view_->cursor().getPos(x, y);
 422         y -= asc;
 423
 424         // if it doesn't touch the screen, don't try to show it
 425         if (y + h < 0 || y >= viewport()->height())
 426                 return;
 427
 428         cursor_visible_ = true;
 429         showCursor(x, y, h, shape);
 430 }
 431
 432
 433 void GuiWorkArea::hideCursor()
 434 {
 435         if (!cursor_visible_)
 436                 return;
 437
 438         cursor_visible_ = false;
 439         removeCursor();
 440 }
 441
 442
 443 void GuiWorkArea::toggleCursor()
 444 {
 445         if (cursor_visible_)
 446                 hideCursor();
 447         else
 448                 showCursor();
 449
 450         // Use this opportunity to deal with any child processes that
 451         // have finished but are waiting to communicate this fact
 452         // to the rest of LyX.
 453         ForkedCallsController::handleCompletedProcesses();
 454 }
 455
 456
 457 void GuiWorkArea::updateScrollbar()
 458 {
 459         ScrollbarParameters const & scroll_ = buffer_view_->scrollbarParameters();
 460
 461         verticalScrollBar()->setTracking(false);
 462
 463         verticalScrollBar()->setRange(scroll_.min, scroll_.max);
 464         verticalScrollBar()->setPageStep(scroll_.page_step);
 465         verticalScrollBar()->setSingleStep(scroll_.single_step);
 466         verticalScrollBar()->setValue(scroll_.position);
 467         verticalScrollBar()->setSliderPosition(scroll_.position);
 468
 469         verticalScrollBar()->setTracking(true);
 470 }
 471
 472
 473 void GuiWorkArea::adjustViewWithScrollBar(int action)
 474 {
 475         stopBlinkingCursor();
 476         if (action == QAbstractSlider::SliderPageStepAdd)
 477                 buffer_view_->scrollDown(viewport()->height());
 478         else if (action == QAbstractSlider::SliderPageStepSub)
 479                 buffer_view_->scrollUp(viewport()->height());
 480         else
 481                 buffer_view_->scrollDocView(verticalScrollBar()->value());
 482
 483         if (lyxrc.cursor_follows_scrollbar) {
 484                 buffer_view_->setCursorFromScrollbar();
 485                 lyx_view_->updateLayoutList();
 486         }
 487         // Show the cursor immediately after any operation.
 488         startBlinkingCursor();
 489         QApplication::syncX();
 490 }
 491
 492
 493 bool GuiWorkArea::event(QEvent * e)
 494 {
 495         switch (e->type()) {
 496         case QEvent::ToolTip: {
 497                 QHelpEvent * helpEvent = static_cast<QHelpEvent *>(e);
 498                 if (lyxrc.use_tooltip) {
 499                         QPoint pos = helpEvent->pos();
 500                         if (pos.x() < viewport()->width()) {
 501                                 QString s = toqstr(buffer_view_->toolTip(pos.x(), pos.y()));
 502                                 QToolTip::showText(helpEvent->globalPos(), s);
 503                         }
 504                         else
 505                                 QToolTip::hideText();
 506                 }
 507                 // Don't forget to accept the event!
 508                 e->accept();
 509                 return true;
 510         }
 511
 512         case QEvent::ShortcutOverride: {
 513                 // We catch this event in order to catch the Tab or Shift+Tab key press
 514                 // which are otherwise reserved to focus switching between controls
 515                 // within a dialog.
 516                 QKeyEvent * ke = static_cast<QKeyEvent*>(e);
 517                 if ((ke->key() != Qt::Key_Tab && ke->key() != Qt::Key_Backtab)
 518                         || ke->modifiers() & Qt::ControlModifier)
 519                         return QAbstractScrollArea::event(e);
 520                 keyPressEvent(ke);
 521                 return true;
 522         }
 523
 524         default:
 525                 return QAbstractScrollArea::event(e);
 526         }
 527         return false;
 528 }
 529
 530
 531 void GuiWorkArea::contextMenuEvent(QContextMenuEvent * e)
 532 {
 533         QPoint pos = e->pos();
 534         docstring name = buffer_view_->contextMenu(pos.x(), pos.y());
 535         if (name.empty()) {
 536                 QAbstractScrollArea::contextMenuEvent(e);
 537                 return;
 538         }
 539         QMenu * menu = guiApp->menus().menu(toqstr(name));
 540         if (!menu) {
 541                 QAbstractScrollArea::contextMenuEvent(e);
 542                 return;
 543         }
 544         // Position the menu to the right.
 545         // FIXME: menu position should be different for RTL text.
 546         pos.rx() += menu->width();
 547         // FIXME: correct vertical position of the menu WRT screen espace.
 548         //pos.ry() += menu->height();
 549         menu->exec(pos);
 550         e->accept();
 551 }
 552
 553
 554 void GuiWorkArea::focusInEvent(QFocusEvent * /*event*/)
 555 {
 556         // Repaint the whole screen.
 557         // Note: this is different from redraw() as only the backing pixmap
 558         // will be redrawn, which is cheap.
 559         viewport()->repaint();
 560
 561         startBlinkingCursor();
 562 }
 563
 564
 565 void GuiWorkArea::focusOutEvent(QFocusEvent * /*event*/)
 566 {
 567         stopBlinkingCursor();
 568 }
 569
 570
 571 void GuiWorkArea::mousePressEvent(QMouseEvent * e)
 572 {
 573         if (dc_event_.active && dc_event_ == *e) {
 574                 dc_event_.active = false;
 575                 FuncRequest cmd(LFUN_MOUSE_TRIPLE, e->x(), e->y(),
 576                         q_button_state(e->button()));
 577                 dispatch(cmd);
 578                 return;
 579         }
 580
 581         inputContext()->reset();
 582
 583         FuncRequest const cmd(LFUN_MOUSE_PRESS, e->x(), e->y(),
 584                 q_button_state(e->button()));
 585         dispatch(cmd, q_key_state(e->modifiers()));
 586 }
 587
 588
 589 void GuiWorkArea::mouseReleaseEvent(QMouseEvent * e)
 590 {
 591         if (synthetic_mouse_event_.timeout.running())
 592                 synthetic_mouse_event_.timeout.stop();
 593
 594         FuncRequest const cmd(LFUN_MOUSE_RELEASE, e->x(), e->y(),
 595                               q_button_state(e->button()));
 596         dispatch(cmd);
 597 }
 598
 599
 600 void GuiWorkArea::mouseMoveEvent(QMouseEvent * e)
 601 {
 602         // we kill the triple click if we move
 603         doubleClickTimeout();
 604         FuncRequest cmd(LFUN_MOUSE_MOTION, e->x(), e->y(),
 605                               q_motion_state(e->buttons()));
 606
 607         // If we're above or below the work area...
 608         if (e->y() <= 20 || e->y() >= viewport()->height() - 20) {
 609                 // Make sure only a synthetic event can cause a page scroll,
 610                 // so they come at a steady rate:
 611                 if (e->y() <= 20)
 612                         // _Force_ a scroll up:
 613                         cmd.y = -40;
 614                 else
 615                         cmd.y = viewport()->height();
 616                 // Store the event, to be handled when the timeout expires.
 617                 synthetic_mouse_event_.cmd = cmd;
 618
 619                 if (synthetic_mouse_event_.timeout.running())
 620                         // Discard the event. Note that it _may_ be handled
 621                         // when the timeout expires if
 622                         // synthetic_mouse_event_.cmd has not been overwritten.
 623                         // Ie, when the timeout expires, we handle the
 624                         // most recent event but discard all others that
 625                         // occurred after the one used to start the timeout
 626                         // in the first place.
 627                         return;
 628                 else {
 629                         synthetic_mouse_event_.restart_timeout = true;
 630                         synthetic_mouse_event_.timeout.start();
 631                         // Fall through to handle this event...
 632                 }
 633
 634         } else if (synthetic_mouse_event_.timeout.running()) {
 635                 // Store the event, to be possibly handled when the timeout
 636                 // expires.
 637                 // Once the timeout has expired, normal control is returned
 638                 // to mouseMoveEvent (restart_timeout = false).
 639                 // This results in a much smoother 'feel' when moving the
 640                 // mouse back into the work area.
 641                 synthetic_mouse_event_.cmd = cmd;
 642                 synthetic_mouse_event_.restart_timeout = false;
 643                 return;
 644         }
 645
 646         // Has anything changed on-screen since the last QMouseEvent
 647         // was received?
 648         double const scrollbar_value = verticalScrollBar()->value();
 649         if (e->x() != synthetic_mouse_event_.x_old ||
 650             e->y() != synthetic_mouse_event_.y_old ||
 651             scrollbar_value != synthetic_mouse_event_.scrollbar_value_old) {
 652                 // Yes it has. Store the params used to check this.
 653                 synthetic_mouse_event_.x_old = e->x();
 654                 synthetic_mouse_event_.y_old = e->y();
 655                 synthetic_mouse_event_.scrollbar_value_old = scrollbar_value;
 656
 657                 // ... and dispatch the event to the LyX core.
 658                 dispatch(cmd);
 659         }
 660 }
 661
 662
 663 void GuiWorkArea::wheelEvent(QWheelEvent * e)
 664 {
 665         // Wheel rotation by one notch results in a delta() of 120 (see
 666         // documentation of QWheelEvent)
 667         int const lines = qApp->wheelScrollLines() * e->delta() / 120;
 668         verticalScrollBar()->setValue(verticalScrollBar()->value() -
 669                         lines *  verticalScrollBar()->singleStep());
 670         adjustViewWithScrollBar();
 671 }
 672
 673
 674 void GuiWorkArea::generateSyntheticMouseEvent()
 675 {
 676 // Set things off to generate the _next_ 'pseudo' event.
 677         if (synthetic_mouse_event_.restart_timeout)
 678                 synthetic_mouse_event_.timeout.start();
 679
 680         // Has anything changed on-screen since the last timeout signal
 681         // was received?
 682         double const scrollbar_value = verticalScrollBar()->value();
 683         if (scrollbar_value != synthetic_mouse_event_.scrollbar_value_old) {
 684                 // Yes it has. Store the params used to check this.
 685                 synthetic_mouse_event_.scrollbar_value_old = scrollbar_value;
 686
 687                 // ... and dispatch the event to the LyX core.
 688                 dispatch(synthetic_mouse_event_.cmd);
 689         }
 690 }
 691
 692
 693 void GuiWorkArea::keyPressEvent(QKeyEvent * ev)
 694 {
 695         // do nothing if there are other events
 696         // (the auto repeated events come too fast)
 697         // \todo FIXME: remove hard coded Qt keys, process the key binding
 698 #ifdef Q_WS_X11
 699         if (XEventsQueued(QX11Info::display(), 0) > 1 && ev->isAutoRepeat()
 700                         && (Qt::Key_PageDown || Qt::Key_PageUp)) {
 701                 LYXERR(Debug::KEY, "system is busy: scroll key event ignored");
 702                 ev->ignore();
 703                 return;
 704         }
 705 #endif
 706
 707         LYXERR(Debug::KEY, " count: " << ev->count()
 708                 << " text: " << fromqstr(ev->text())
 709                 << " isAutoRepeat: " << ev->isAutoRepeat() << " key: " << ev->key());
 710
 711         KeySymbol sym;
 712         setKeySymbol(&sym, ev);
 713         processKeySym(sym, q_key_state(ev->modifiers()));
 714         ev->accept();
 715 }
 716
 717
 718 void GuiWorkArea::doubleClickTimeout()
 719 {
 720         dc_event_.active = false;
 721 }
 722
 723
 724 void GuiWorkArea::mouseDoubleClickEvent(QMouseEvent * ev)
 725 {
 726         dc_event_ = DoubleClick(ev);
 727         QTimer::singleShot(QApplication::doubleClickInterval(), this,
 728                            SLOT(doubleClickTimeout()));
 729         FuncRequest cmd(LFUN_MOUSE_DOUBLE,
 730                         ev->x(), ev->y(),
 731                         q_button_state(ev->button()));
 732         dispatch(cmd);
 733 }
 734
 735
 736 void GuiWorkArea::resizeEvent(QResizeEvent * ev)
 737 {
 738         QAbstractScrollArea::resizeEvent(ev);
 739         need_resize_ = true;
 740 }
 741
 742
 743 void GuiWorkArea::update(int x, int y, int w, int h)
 744 {
 745         viewport()->repaint(x, y, w, h);
 746 }
 747
 748
 749 void GuiWorkArea::paintEvent(QPaintEvent * ev)
 750 {
 751         QRect const rc = ev->rect();
 752         // LYXERR(Debug::PAINTING, "paintEvent begin: x: " << rc.x()
 753         //      << " y: " << rc.y() << " w: " << rc.width() << " h: " << rc.height());
 754
 755         if (need_resize_) {
 756                 screen_ = QPixmap(viewport()->width(), viewport()->height());
 757                 resizeBufferView();
 758                 updateScreen();
 759                 hideCursor();
 760                 showCursor();
 761         }
 762
 763         QPainter pain(viewport());
 764         pain.drawPixmap(rc, screen_, rc);
 765         cursor_->draw(pain);
 766 }
 767
 768
 769 void GuiWorkArea::updateScreen()
 770 {
 771         GuiPainter pain(&screen_);
 772         buffer_view_->draw(pain);
 773 }
 774
 775
 776 void GuiWorkArea::showCursor(int x, int y, int h, CursorShape shape)
 777 {
 778         if (schedule_redraw_) {
 779                 buffer_view_->updateMetrics();
 780                 updateScreen();
 781                 viewport()->update(QRect(0, 0, viewport()->width(), viewport()->height()));
 782                 schedule_redraw_ = false;
 783                 // Show the cursor immediately after the update.
 784                 hideCursor();
 785                 toggleCursor();
 786                 return;
 787         }
 788
 789         cursor_->update(x, y, h, shape);
 790         cursor_->show();
 791         viewport()->update(cursor_->rect());
 792 }
 793
 794
 795 void GuiWorkArea::removeCursor()
 796 {
 797         cursor_->hide();
 798         //if (!qApp->focusWidget())
 799                 viewport()->update(cursor_->rect());
 800 }
 801
 802
 803 void GuiWorkArea::inputMethodEvent(QInputMethodEvent * e)
 804 {
 805         QString const & commit_string = e->commitString();
 806         docstring const & preedit_string
 807                 = qstring_to_ucs4(e->preeditString());
 808
 809         if (!commit_string.isEmpty()) {
 810
 811                 LYXERR(Debug::KEY, "preeditString: " << fromqstr(e->preeditString())
 812                         << " commitString: " << fromqstr(e->commitString()));
 813
 814                 int key = 0;
 815
 816                 // FIXME Iwami 04/01/07: we should take care also of UTF16 surrogates here.
 817                 for (int i = 0; i != commit_string.size(); ++i) {
 818                         QKeyEvent ev(QEvent::KeyPress, key, Qt::NoModifier, commit_string[i]);
 819                         keyPressEvent(&ev);
 820                 }
 821         }
 822
 823         // Hide the cursor during the kana-kanji transformation.
 824         if (preedit_string.empty())
 825                 startBlinkingCursor();
 826         else
 827                 stopBlinkingCursor();
 828
 829         // last_width : for checking if last preedit string was/wasn't empty.
 830         static bool last_width = false;
 831         if (!last_width && preedit_string.empty()) {
 832                 // if last_width is last length of preedit string.
 833                 e->accept();
 834                 return;
 835         }
 836
 837         GuiPainter pain(&screen_);
 838         buffer_view_->updateMetrics();
 839         buffer_view_->draw(pain);
 840         FontInfo font = buffer_view_->cursor().getFont().fontInfo();
 841         FontMetrics const & fm = theFontMetrics(font);
 842         int height = fm.maxHeight();
 843         int cur_x = cursor_->rect().left();
 844         int cur_y = cursor_->rect().bottom();
 845
 846         // redraw area of preedit string.
 847         update(0, cur_y - height, viewport()->width(),
 848                 (height + 1) * preedit_lines_);
 849
 850         if (preedit_string.empty()) {
 851                 last_width = false;
 852                 preedit_lines_ = 1;
 853                 e->accept();
 854                 return;
 855         }
 856         last_width = true;
 857
 858         // att : stores an IM attribute.
 859         QList<QInputMethodEvent::Attribute> const & att = e->attributes();
 860
 861         // get attributes of input method cursor.
 862         // cursor_pos : cursor position in preedit string.
 863         size_t cursor_pos = 0;
 864         bool cursor_is_visible = false;
 865         for (int i = 0; i != att.size(); ++i) {
 866                 if (att.at(i).type == QInputMethodEvent::Cursor) {
 867                         cursor_pos = att.at(i).start;
 868                         cursor_is_visible = att.at(i).length != 0;
 869                         break;
 870                 }
 871         }
 872
 873         size_t preedit_length = preedit_string.length();
 874
 875         // get position of selection in input method.
 876         // FIXME: isn't there a way to do this simplier?
 877         // rStart : cursor position in selected string in IM.
 878         size_t rStart = 0;
 879         // rLength : selected string length in IM.
 880         size_t rLength = 0;
 881         if (cursor_pos < preedit_length) {
 882                 for (int i = 0; i != att.size(); ++i) {
 883                         if (att.at(i).type == QInputMethodEvent::TextFormat) {
 884                                 if (att.at(i).start <= int(cursor_pos)
 885                                         && int(cursor_pos) < att.at(i).start + att.at(i).length) {
 886                                                 rStart = att.at(i).start;
 887                                                 rLength = att.at(i).length;
 888                                                 if (!cursor_is_visible)
 889                                                         cursor_pos += rLength;
 890                                                 break;
 891                                 }
 892                         }
 893                 }
 894         }
 895         else {
 896                 rStart = cursor_pos;
 897                 rLength = 0;
 898         }
 899
 900         int const right_margin = rightMargin();
 901         Painter::preedit_style ps;
 902         // Most often there would be only one line:
 903         preedit_lines_ = 1;
 904         for (size_t pos = 0; pos != preedit_length; ++pos) {
 905                 char_type const typed_char = preedit_string[pos];
 906                 // reset preedit string style
 907                 ps = Painter::preedit_default;
 908
 909                 // if we reached the right extremity of the screen, go to next line.
 910                 if (cur_x + fm.width(typed_char) > viewport()->width() - right_margin) {
 911                         cur_x = right_margin;
 912                         cur_y += height + 1;
 913                         ++preedit_lines_;
 914                 }
 915                 // preedit strings are displayed with dashed underline
 916                 // and partial strings are displayed white on black indicating
 917                 // that we are in selecting mode in the input method.
 918                 // FIXME: rLength == preedit_length is not a changing condition
 919                 // FIXME: should be put out of the loop.
 920                 if (pos >= rStart
 921                         && pos < rStart + rLength
 922                         && !(cursor_pos < rLength && rLength == preedit_length))
 923                         ps = Painter::preedit_selecting;
 924
 925                 if (pos == cursor_pos
 926                         && (cursor_pos < rLength && rLength == preedit_length))
 927                         ps = Painter::preedit_cursor;
 928
 929                 // draw one character and update cur_x.
 930                 cur_x += pain.preeditText(cur_x, cur_y, typed_char, font, ps);
 931         }
 932
 933         // update the preedit string screen area.
 934         update(0, cur_y - preedit_lines_*height, viewport()->width(),
 935                 (height + 1) * preedit_lines_);
 936
 937         // Don't forget to accept the event!
 938         e->accept();
 939 }
 940
 941
 942 QVariant GuiWorkArea::inputMethodQuery(Qt::InputMethodQuery query) const
 943 {
 944         QRect cur_r(0,0,0,0);
 945         switch (query) {
 946                 // this is the CJK-specific composition window position.
 947                 case Qt::ImMicroFocus:
 948                         cur_r = cursor_->rect();
 949                         if (preedit_lines_ != 1)
 950                                 cur_r.moveLeft(10);
 951                         cur_r.moveBottom(cur_r.bottom() + cur_r.height() * preedit_lines_);
 952                         // return lower right of cursor in LyX.
 953                         return cur_r;
 954                 default:
 955                         return QWidget::inputMethodQuery(query);
 956         }
 957 }
 958
 959
 960 void GuiWorkArea::updateWindowTitle()
 961 {
 962         docstring maximize_title;
 963         docstring minimize_title;
 964
 965         Buffer & buf = buffer_view_->buffer();
 966         FileName const fileName = buf.fileName();
 967         if (!fileName.empty()) {
 968                 maximize_title = fileName.displayName(30);
 969                 minimize_title = from_utf8(fileName.onlyFileName());
 970                 if (!buf.isClean()) {
 971                         maximize_title += _(" (changed)");
 972                         minimize_title += char_type('*');
 973                 }
 974                 if (buf.isReadonly())
 975                         maximize_title += _(" (read only)");
 976         }
 977
 978         QString title = windowTitle();
 979         QString new_title = toqstr(maximize_title);
 980         if (title == new_title)
 981                 return;
 982
 983         QWidget::setWindowTitle(new_title);
 984         QWidget::setWindowIconText(toqstr(minimize_title));
 985         titleChanged(this);
 986 }
 987
 988
 989 void GuiWorkArea::setReadOnly(bool)
 990 {
 991         updateWindowTitle();
 992         if (this == lyx_view_->currentWorkArea())
 993                 lyx_view_->updateBufferDependent(false);
 994 }
 995
 996
 997 ////////////////////////////////////////////////////////////////////
 998 //
 999 // TabWorkArea
1000 //
1001 ////////////////////////////////////////////////////////////////////
1002
1003 TabWorkArea::TabWorkArea(QWidget * parent) : QTabWidget(parent)
1004 {
1005         QPalette pal = palette();
1006         pal.setColor(QPalette::Active, QPalette::Button,
1007                 pal.color(QPalette::Active, QPalette::Window));
1008         pal.setColor(QPalette::Disabled, QPalette::Button,
1009                 pal.color(QPalette::Disabled, QPalette::Window));
1010         pal.setColor(QPalette::Inactive, QPalette::Button,
1011                 pal.color(QPalette::Inactive, QPalette::Window));
1012
1013         QToolButton * closeTabButton = new QToolButton(this);
1014     closeTabButton->setPalette(pal);
1015         closeTabButton->setIcon(QIcon(":/images/closetab.png"));
1016         closeTabButton->setText("Close");
1017         closeTabButton->setAutoRaise(true);
1018         closeTabButton->setCursor(Qt::ArrowCursor);
1019         closeTabButton->setToolTip(tr("Close tab"));
1020         closeTabButton->setEnabled(true);
1021
1022         QObject::connect(this, SIGNAL(currentChanged(int)),
1023                 this, SLOT(on_currentTabChanged(int)));
1024         QObject::connect(closeTabButton, SIGNAL(clicked()),
1025                 this, SLOT(closeCurrentTab()));
1026
1027         setCornerWidget(closeTabButton);
1028         setUsesScrollButtons(true);
1029 }
1030
1031
1032 void TabWorkArea::showBar(bool show)
1033 {
1034         tabBar()->setEnabled(show);
1035         tabBar()->setVisible(show);
1036 }
1037
1038
1039 GuiWorkArea * TabWorkArea::currentWorkArea()
1040 {
1041         if (count() == 0)
1042                 return 0;
1043
1044         GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(currentWidget());
1045         BOOST_ASSERT(wa);
1046         return wa;
1047 }
1048
1049
1050 GuiWorkArea * TabWorkArea::workArea(Buffer & buffer)
1051 {
1052         for (int i = 0; i != count(); ++i) {
1053                 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i));
1054                 BOOST_ASSERT(wa);
1055                 if (&wa->bufferView().buffer() == &buffer)
1056                         return wa;
1057         }
1058         return 0;
1059 }
1060
1061
1062 void TabWorkArea::closeAll()
1063 {
1064         while (count()) {
1065                 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(0));
1066                 BOOST_ASSERT(wa);
1067                 removeTab(0);
1068                 delete wa;
1069         }
1070 }
1071
1072
1073 bool TabWorkArea::setCurrentWorkArea(GuiWorkArea * work_area)
1074 {
1075         BOOST_ASSERT(work_area);
1076         int index = indexOf(work_area);
1077         if (index == -1)
1078                 return false;
1079
1080         if (index == currentIndex())
1081                 // Make sure the work area is up to date.
1082                 on_currentTabChanged(index);
1083         else
1084                 // Switch to the work area.
1085                 setCurrentIndex(index);
1086         work_area->setFocus();
1087
1088         return true;
1089 }
1090
1091
1092 GuiWorkArea * TabWorkArea::addWorkArea(Buffer & buffer, GuiView & view)
1093 {
1094         GuiWorkArea * wa = new GuiWorkArea(buffer, view);
1095         wa->setUpdatesEnabled(false);
1096         // Hide tabbar if there's no tab (avoid a resize and a flashing tabbar
1097         // when hiding it again below).
1098         showBar(count() > 0);
1099         addTab(wa, wa->windowTitle());
1100         QObject::connect(wa, SIGNAL(titleChanged(GuiWorkArea *)),
1101                 this, SLOT(updateTabText(GuiWorkArea *)));
1102         // Hide tabbar if there's only one tab.
1103         showBar(count() > 1);
1104         return wa;
1105 }
1106
1107
1108 bool TabWorkArea::removeWorkArea(GuiWorkArea * work_area)
1109 {
1110         BOOST_ASSERT(work_area);
1111         int index = indexOf(work_area);
1112         if (index == -1)
1113                 return false;
1114
1115         work_area->setUpdatesEnabled(false);
1116         removeTab(index);
1117         delete work_area;
1118
1119         if (count()) {
1120                 // make sure the next work area is enabled.
1121                 currentWidget()->setUpdatesEnabled(true);
1122                 // Hide tabbar if there's only one tab.
1123                 showBar(count() > 1);
1124         }
1125         return true;
1126 }
1127
1128
1129 void TabWorkArea::on_currentTabChanged(int i)
1130 {
1131         GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i));
1132         BOOST_ASSERT(wa);
1133         BufferView & bv = wa->bufferView();
1134         bv.cursor().fixIfBroken();
1135         bv.updateMetrics();
1136         wa->setUpdatesEnabled(true);
1137         wa->redraw();
1138         wa->setFocus();
1139         ///
1140         currentWorkAreaChanged(wa);
1141
1142         LYXERR(Debug::GUI, "currentTabChanged " << i
1143                 << "File" << bv.buffer().absFileName());
1144 }
1145
1146
1147 void TabWorkArea::closeCurrentTab()
1148 {
1149         lyx::dispatch(FuncRequest(LFUN_BUFFER_CLOSE));
1150 }
1151
1152
1153 void TabWorkArea::updateTabText(GuiWorkArea * wa)
1154 {
1155         int const i = indexOf(wa);
1156         if (i < 0)
1157                 return;
1158         setTabText(i, wa->windowTitle());
1159 }
1160
1161 } // namespace frontend
1162 } // namespace lyx
1163
1164 #include "GuiWorkArea_moc.cpp"