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         connect(&cursor_timeout_, SIGNAL(timeout()),
 201                 this, SLOT(toggleCursor()));
 202
 203         int const time = QApplication::cursorFlashTime() / 2;
 204         if (time > 0) {
 205                 cursor_timeout_.setInterval(time);
 206                 cursor_timeout_.start();
 207         } else
 208                 // let's initialize this just to be safe
 209                 cursor_timeout_.setInterval(500);
 210
 211         general_timer_.setInterval(500);
 212         connect(&general_timer_, SIGNAL(timeout()),
 213                 this, SLOT(handleRegularEvents()));
 214         general_timer_.start();
 215
 216         screen_ = QPixmap(viewport()->width(), viewport()->height());
 217         cursor_ = new frontend::CursorWidget();
 218         cursor_->hide();
 219
 220         setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
 221         setAcceptDrops(true);
 222         setMouseTracking(true);
 223         setMinimumSize(100, 70);
 224         updateWindowTitle();
 225
 226         viewport()->setAutoFillBackground(false);
 227         // We don't need double-buffering nor SystemBackground on
 228         // the viewport because we have our own backing pixmap.
 229         viewport()->setAttribute(Qt::WA_NoSystemBackground);
 230
 231         setFocusPolicy(Qt::WheelFocus);
 232
 233         viewport()->setCursor(Qt::IBeamCursor);
 234
 235         synthetic_mouse_event_.timeout.timeout.connect(
 236                 boost::bind(&GuiWorkArea::generateSyntheticMouseEvent,
 237                                         this));
 238
 239         // Initialize the vertical Scroll Bar
 240         QObject::connect(verticalScrollBar(), SIGNAL(valueChanged(int)),
 241                 this, SLOT(scrollTo(int)));
 242
 243         LYXERR(Debug::GUI, "viewport width: " << viewport()->width()
 244                 << "  viewport height: " << viewport()->height());
 245
 246         // Enables input methods for asian languages.
 247         // Must be set when creating custom text editing widgets.
 248         setAttribute(Qt::WA_InputMethodEnabled, true);
 249 }
 250
 251
 252
 253 GuiWorkArea::~GuiWorkArea()
 254 {
 255         buffer_view_->buffer().workAreaManager().remove(this);
 256         delete buffer_view_;
 257         delete cursor_;
 258 }
 259
 260
 261 void GuiWorkArea::close()
 262 {
 263         lyx_view_->removeWorkArea(this);
 264 }
 265
 266
 267 BufferView & GuiWorkArea::bufferView()
 268 {
 269         return *buffer_view_;
 270 }
 271
 272
 273 BufferView const & GuiWorkArea::bufferView() const
 274 {
 275         return *buffer_view_;
 276 }
 277
 278
 279 void GuiWorkArea::stopBlinkingCursor()
 280 {
 281         cursor_timeout_.stop();
 282         hideCursor();
 283 }
 284
 285
 286 void GuiWorkArea::startBlinkingCursor()
 287 {
 288         showCursor();
 289         //we're not supposed to cache this value.
 290         int const time = QApplication::cursorFlashTime() / 2;
 291         if (time <= 0)
 292                 return;
 293         cursor_timeout_.setInterval(time);
 294         cursor_timeout_.start();
 295 }
 296
 297
 298 void GuiWorkArea::redraw()
 299 {
 300         if (!isVisible())
 301                 // No need to redraw in this case.
 302                 return;
 303
 304         // No need to do anything if this is the current view. The BufferView
 305         // metrics are already up to date.
 306         if (lyx_view_ != guiApp->currentView()) {
 307                 // FIXME: it would be nice to optimize for the off-screen case.
 308                 buffer_view_->updateMetrics();
 309                 buffer_view_->cursor().fixIfBroken();
 310         }
 311
 312         // update cursor position, because otherwise it has to wait until
 313         // the blinking interval is over
 314         if (cursor_visible_) {
 315                 hideCursor();
 316                 showCursor();
 317         }
 318
 319         LYXERR(Debug::WORKAREA, "WorkArea::redraw screen");
 320         updateScreen();
 321         update(0, 0, viewport()->width(), viewport()->height());
 322
 323         /// \warning: scrollbar updating *must* be done after the BufferView is drawn
 324         /// because \c BufferView::updateScrollbar() is called in \c BufferView::draw().
 325         updateScrollbar();
 326         lyx_view_->updateStatusBar();
 327
 328         if (lyxerr.debugging(Debug::WORKAREA))
 329                 buffer_view_->coordCache().dump();
 330 }
 331
 332
 333 void GuiWorkArea::processKeySym(KeySymbol const & key, KeyModifier mod)
 334 {
 335         // In order to avoid bad surprise in the middle of an operation,
 336         // we better stop the blinking cursor.
 337         stopBlinkingCursor();
 338
 339         theLyXFunc().setLyXView(lyx_view_);
 340         theLyXFunc().processKeySym(key, mod);
 341 }
 342
 343
 344 void GuiWorkArea::dispatch(FuncRequest const & cmd0, KeyModifier mod)
 345 {
 346         // Handle drag&drop
 347         if (cmd0.action == LFUN_FILE_OPEN) {
 348                 lyx_view_->dispatch(cmd0);
 349                 return;
 350         }
 351
 352         theLyXFunc().setLyXView(lyx_view_);
 353
 354         FuncRequest cmd;
 355
 356         if (cmd0.action == LFUN_MOUSE_PRESS) {
 357                 if (mod == ShiftModifier)
 358                         cmd = FuncRequest(cmd0, "region-select");
 359                 else if (mod == ControlModifier)
 360                         cmd = FuncRequest(cmd0, "paragraph-select");
 361                 else
 362                         cmd = cmd0;
 363         }
 364         else
 365                 cmd = cmd0;
 366
 367         // In order to avoid bad surprise in the middle of an operation, we better stop
 368         // the blinking cursor.
 369         if (!(cmd.action == LFUN_MOUSE_MOTION
 370                 && cmd.button() == mouse_button::none))
 371                 stopBlinkingCursor();
 372
 373         buffer_view_->mouseEventDispatch(cmd);
 374
 375         // Skip these when selecting
 376         if (cmd.action != LFUN_MOUSE_MOTION) {
 377                 lyx_view_->updateLayoutList();
 378                 lyx_view_->updateToolbars();
 379         }
 380
 381         // GUI tweaks except with mouse motion with no button pressed.
 382         if (!(cmd.action == LFUN_MOUSE_MOTION
 383                 && cmd.button() == mouse_button::none)) {
 384                 // Slight hack: this is only called currently when we
 385                 // clicked somewhere, so we force through the display
 386                 // of the new status here.
 387                 lyx_view_->clearMessage();
 388
 389                 // Show the cursor immediately after any operation.
 390                 startBlinkingCursor();
 391         }
 392 }
 393
 394
 395 void GuiWorkArea::resizeBufferView()
 396 {
 397         // WARNING: Please don't put any code that will trigger a repaint here!
 398         // We are already inside a paint event.
 399         lyx_view_->setBusy(true);
 400         buffer_view_->resize(viewport()->width(), viewport()->height());
 401         lyx_view_->updateLayoutList();
 402         lyx_view_->setBusy(false);
 403         need_resize_ = false;
 404 }
 405
 406
 407 void GuiWorkArea::showCursor()
 408 {
 409         if (cursor_visible_)
 410                 return;
 411
 412         CursorShape shape = BAR_SHAPE;
 413
 414         Font const & realfont = buffer_view_->cursor().real_current_font;
 415         BufferParams const & bp = buffer_view_->buffer().params();
 416         bool const samelang = realfont.language() == bp.language;
 417         bool const isrtl = realfont.isVisibleRightToLeft();
 418
 419         if (!samelang || isrtl != bp.language->rightToLeft()) {
 420                 shape = L_SHAPE;
 421                 if (isrtl)
 422                         shape = REVERSED_L_SHAPE;
 423         }
 424
 425         // The ERT language hack needs fixing up
 426         if (realfont.language() == latex_language)
 427                 shape = BAR_SHAPE;
 428
 429         Font const font = buffer_view_->cursor().getFont();
 430         FontMetrics const & fm = theFontMetrics(font);
 431         int const asc = fm.maxAscent();
 432         int const des = fm.maxDescent();
 433         int h = asc + des;
 434         int x = 0;
 435         int y = 0;
 436         buffer_view_->cursor().getPos(x, y);
 437         y -= asc;
 438
 439         // if it doesn't touch the screen, don't try to show it
 440         if (y + h < 0 || y >= viewport()->height())
 441                 return;
 442
 443         cursor_visible_ = true;
 444         showCursor(x, y, h, shape);
 445 }
 446
 447
 448 void GuiWorkArea::hideCursor()
 449 {
 450         if (!cursor_visible_)
 451                 return;
 452
 453         cursor_visible_ = false;
 454         removeCursor();
 455 }
 456
 457
 458 void GuiWorkArea::toggleCursor()
 459 {
 460         if (cursor_visible_)
 461                 hideCursor();
 462         else
 463                 showCursor();
 464 }
 465
 466
 467 void GuiWorkArea::handleRegularEvents()
 468 {
 469         ForkedCallsController::handleCompletedProcesses();
 470 }
 471
 472
 473 void GuiWorkArea::updateScrollbar()
 474 {
 475         ScrollbarParameters const & scroll_ = buffer_view_->scrollbarParameters();
 476
 477         verticalScrollBar()->setRange(scroll_.min, scroll_.max);
 478         verticalScrollBar()->setPageStep(scroll_.page_step);
 479         verticalScrollBar()->setSingleStep(scroll_.single_step);
 480         // Block the scrollbar signal to prevent recursive signal/slot calling.
 481         verticalScrollBar()->blockSignals(true);
 482         verticalScrollBar()->setValue(scroll_.position);
 483         verticalScrollBar()->setSliderPosition(scroll_.position);
 484         verticalScrollBar()->blockSignals(false);
 485 }
 486
 487
 488 void GuiWorkArea::scrollTo(int value)
 489 {
 490         stopBlinkingCursor();
 491         buffer_view_->scrollDocView(value);
 492
 493         if (lyxrc.cursor_follows_scrollbar) {
 494                 buffer_view_->setCursorFromScrollbar();
 495                 lyx_view_->updateLayoutList();
 496         }
 497         // Show the cursor immediately after any operation.
 498         startBlinkingCursor();
 499         QApplication::syncX();
 500 }
 501
 502
 503 bool GuiWorkArea::event(QEvent * e)
 504 {
 505         switch (e->type()) {
 506         case QEvent::ToolTip: {
 507                 QHelpEvent * helpEvent = static_cast<QHelpEvent *>(e);
 508                 if (lyxrc.use_tooltip) {
 509                         QPoint pos = helpEvent->pos();
 510                         if (pos.x() < viewport()->width()) {
 511                                 QString s = toqstr(buffer_view_->toolTip(pos.x(), pos.y()));
 512                                 QToolTip::showText(helpEvent->globalPos(), s);
 513                         }
 514                         else
 515                                 QToolTip::hideText();
 516                 }
 517                 // Don't forget to accept the event!
 518                 e->accept();
 519                 return true;
 520         }
 521
 522         case QEvent::ShortcutOverride: {
 523                 // We catch this event in order to catch the Tab or Shift+Tab key press
 524                 // which are otherwise reserved to focus switching between controls
 525                 // within a dialog.
 526                 QKeyEvent * ke = static_cast<QKeyEvent*>(e);
 527                 if ((ke->key() != Qt::Key_Tab && ke->key() != Qt::Key_Backtab)
 528                         || ke->modifiers() & Qt::ControlModifier)
 529                         return QAbstractScrollArea::event(e);
 530                 keyPressEvent(ke);
 531                 return true;
 532         }
 533
 534         default:
 535                 return QAbstractScrollArea::event(e);
 536         }
 537         return false;
 538 }
 539
 540
 541 void GuiWorkArea::contextMenuEvent(QContextMenuEvent * e)
 542 {
 543         QPoint pos = e->pos();
 544         docstring name = buffer_view_->contextMenu(pos.x(), pos.y());
 545         if (name.empty()) {
 546                 QAbstractScrollArea::contextMenuEvent(e);
 547                 return;
 548         }
 549         QMenu * menu = guiApp->menus().menu(toqstr(name));
 550         if (!menu) {
 551                 QAbstractScrollArea::contextMenuEvent(e);
 552                 return;
 553         }
 554         // Position the menu to the right.
 555         // FIXME: menu position should be different for RTL text.
 556         pos.rx() += menu->width();
 557         // FIXME: correct vertical position of the menu WRT screen espace.
 558         //pos.ry() += menu->height();
 559         menu->exec(pos);
 560         e->accept();
 561 }
 562
 563
 564 void GuiWorkArea::focusInEvent(QFocusEvent * /*event*/)
 565 {
 566         // Repaint the whole screen.
 567         // Note: this is different from redraw() as only the backing pixmap
 568         // will be redrawn, which is cheap.
 569         viewport()->repaint();
 570
 571         startBlinkingCursor();
 572 }
 573
 574
 575 void GuiWorkArea::focusOutEvent(QFocusEvent * /*event*/)
 576 {
 577         stopBlinkingCursor();
 578 }
 579
 580
 581 void GuiWorkArea::mousePressEvent(QMouseEvent * e)
 582 {
 583         if (dc_event_.active && dc_event_ == *e) {
 584                 dc_event_.active = false;
 585                 FuncRequest cmd(LFUN_MOUSE_TRIPLE, e->x(), e->y(),
 586                         q_button_state(e->button()));
 587                 dispatch(cmd);
 588                 return;
 589         }
 590
 591         inputContext()->reset();
 592
 593         FuncRequest const cmd(LFUN_MOUSE_PRESS, e->x(), e->y(),
 594                 q_button_state(e->button()));
 595         dispatch(cmd, q_key_state(e->modifiers()));
 596 }
 597
 598
 599 void GuiWorkArea::mouseReleaseEvent(QMouseEvent * e)
 600 {
 601         if (synthetic_mouse_event_.timeout.running())
 602                 synthetic_mouse_event_.timeout.stop();
 603
 604         FuncRequest const cmd(LFUN_MOUSE_RELEASE, e->x(), e->y(),
 605                               q_button_state(e->button()));
 606         dispatch(cmd);
 607 }
 608
 609
 610 void GuiWorkArea::mouseMoveEvent(QMouseEvent * e)
 611 {
 612         // we kill the triple click if we move
 613         doubleClickTimeout();
 614         FuncRequest cmd(LFUN_MOUSE_MOTION, e->x(), e->y(),
 615                               q_motion_state(e->buttons()));
 616
 617         // If we're above or below the work area...
 618         if (e->y() <= 20 || e->y() >= viewport()->height() - 20) {
 619                 // Make sure only a synthetic event can cause a page scroll,
 620                 // so they come at a steady rate:
 621                 if (e->y() <= 20)
 622                         // _Force_ a scroll up:
 623                         cmd.y = -40;
 624                 else
 625                         cmd.y = viewport()->height();
 626                 // Store the event, to be handled when the timeout expires.
 627                 synthetic_mouse_event_.cmd = cmd;
 628
 629                 if (synthetic_mouse_event_.timeout.running())
 630                         // Discard the event. Note that it _may_ be handled
 631                         // when the timeout expires if
 632                         // synthetic_mouse_event_.cmd has not been overwritten.
 633                         // Ie, when the timeout expires, we handle the
 634                         // most recent event but discard all others that
 635                         // occurred after the one used to start the timeout
 636                         // in the first place.
 637                         return;
 638                 else {
 639                         synthetic_mouse_event_.restart_timeout = true;
 640                         synthetic_mouse_event_.timeout.start();
 641                         // Fall through to handle this event...
 642                 }
 643
 644         } else if (synthetic_mouse_event_.timeout.running()) {
 645                 // Store the event, to be possibly handled when the timeout
 646                 // expires.
 647                 // Once the timeout has expired, normal control is returned
 648                 // to mouseMoveEvent (restart_timeout = false).
 649                 // This results in a much smoother 'feel' when moving the
 650                 // mouse back into the work area.
 651                 synthetic_mouse_event_.cmd = cmd;
 652                 synthetic_mouse_event_.restart_timeout = false;
 653                 return;
 654         }
 655
 656         // Has anything changed on-screen since the last QMouseEvent
 657         // was received?
 658         double const scrollbar_value = verticalScrollBar()->value();
 659         if (e->x() != synthetic_mouse_event_.x_old ||
 660             e->y() != synthetic_mouse_event_.y_old ||
 661             scrollbar_value != synthetic_mouse_event_.scrollbar_value_old) {
 662                 // Yes it has. Store the params used to check this.
 663                 synthetic_mouse_event_.x_old = e->x();
 664                 synthetic_mouse_event_.y_old = e->y();
 665                 synthetic_mouse_event_.scrollbar_value_old = scrollbar_value;
 666
 667                 // ... and dispatch the event to the LyX core.
 668                 dispatch(cmd);
 669         }
 670 }
 671
 672
 673 void GuiWorkArea::wheelEvent(QWheelEvent * e)
 674 {
 675         // Wheel rotation by one notch results in a delta() of 120 (see
 676         // documentation of QWheelEvent)
 677         double const lines = qApp->wheelScrollLines()
 678                 * lyxrc.mouse_wheel_speed
 679                 * e->delta() / 120.0;
 680         lyxerr << "wheelScrollLines = " << qApp->wheelScrollLines()
 681                 << " delta = " << e->delta()
 682                 << " lines = " << lines
 683                 << std::endl;
 684         verticalScrollBar()->setValue(verticalScrollBar()->value() -
 685                 int(lines *  verticalScrollBar()->singleStep()));
 686 }
 687
 688
 689 void GuiWorkArea::generateSyntheticMouseEvent()
 690 {
 691 // Set things off to generate the _next_ 'pseudo' event.
 692         if (synthetic_mouse_event_.restart_timeout)
 693                 synthetic_mouse_event_.timeout.start();
 694
 695         // Has anything changed on-screen since the last timeout signal
 696         // was received?
 697         double const scrollbar_value = verticalScrollBar()->value();
 698         if (scrollbar_value != synthetic_mouse_event_.scrollbar_value_old) {
 699                 // Yes it has. Store the params used to check this.
 700                 synthetic_mouse_event_.scrollbar_value_old = scrollbar_value;
 701
 702                 // ... and dispatch the event to the LyX core.
 703                 dispatch(synthetic_mouse_event_.cmd);
 704         }
 705 }
 706
 707
 708 void GuiWorkArea::keyPressEvent(QKeyEvent * ev)
 709 {
 710         // do nothing if there are other events
 711         // (the auto repeated events come too fast)
 712         // \todo FIXME: remove hard coded Qt keys, process the key binding
 713 #ifdef Q_WS_X11
 714         if (XEventsQueued(QX11Info::display(), 0) > 1 && ev->isAutoRepeat()
 715                         && (Qt::Key_PageDown || Qt::Key_PageUp)) {
 716                 LYXERR(Debug::KEY, "system is busy: scroll key event ignored");
 717                 ev->ignore();
 718                 return;
 719         }
 720 #endif
 721
 722         LYXERR(Debug::KEY, " count: " << ev->count()
 723                 << " text: " << fromqstr(ev->text())
 724                 << " isAutoRepeat: " << ev->isAutoRepeat() << " key: " << ev->key());
 725
 726         KeySymbol sym;
 727         setKeySymbol(&sym, ev);
 728         processKeySym(sym, q_key_state(ev->modifiers()));
 729         ev->accept();
 730 }
 731
 732
 733 void GuiWorkArea::doubleClickTimeout()
 734 {
 735         dc_event_.active = false;
 736 }
 737
 738
 739 void GuiWorkArea::mouseDoubleClickEvent(QMouseEvent * ev)
 740 {
 741         dc_event_ = DoubleClick(ev);
 742         QTimer::singleShot(QApplication::doubleClickInterval(), this,
 743                            SLOT(doubleClickTimeout()));
 744         FuncRequest cmd(LFUN_MOUSE_DOUBLE,
 745                         ev->x(), ev->y(),
 746                         q_button_state(ev->button()));
 747         dispatch(cmd);
 748 }
 749
 750
 751 void GuiWorkArea::resizeEvent(QResizeEvent * ev)
 752 {
 753         QAbstractScrollArea::resizeEvent(ev);
 754         need_resize_ = true;
 755 }
 756
 757
 758 void GuiWorkArea::update(int x, int y, int w, int h)
 759 {
 760         viewport()->repaint(x, y, w, h);
 761 }
 762
 763
 764 void GuiWorkArea::paintEvent(QPaintEvent * ev)
 765 {
 766         QRect const rc = ev->rect();
 767         // LYXERR(Debug::PAINTING, "paintEvent begin: x: " << rc.x()
 768         //      << " y: " << rc.y() << " w: " << rc.width() << " h: " << rc.height());
 769
 770         if (need_resize_) {
 771                 screen_ = QPixmap(viewport()->width(), viewport()->height());
 772                 resizeBufferView();
 773                 updateScreen();
 774                 hideCursor();
 775                 showCursor();
 776         }
 777
 778         QPainter pain(viewport());
 779         pain.drawPixmap(rc, screen_, rc);
 780         cursor_->draw(pain);
 781 }
 782
 783
 784 void GuiWorkArea::updateScreen()
 785 {
 786         GuiPainter pain(&screen_);
 787         buffer_view_->draw(pain);
 788 }
 789
 790
 791 void GuiWorkArea::showCursor(int x, int y, int h, CursorShape shape)
 792 {
 793         if (schedule_redraw_) {
 794                 buffer_view_->updateMetrics();
 795                 updateScreen();
 796                 viewport()->update(QRect(0, 0, viewport()->width(), viewport()->height()));
 797                 schedule_redraw_ = false;
 798                 // Show the cursor immediately after the update.
 799                 hideCursor();
 800                 toggleCursor();
 801                 return;
 802         }
 803
 804         cursor_->update(x, y, h, shape);
 805         cursor_->show();
 806         viewport()->update(cursor_->rect());
 807 }
 808
 809
 810 void GuiWorkArea::removeCursor()
 811 {
 812         cursor_->hide();
 813         //if (!qApp->focusWidget())
 814                 viewport()->update(cursor_->rect());
 815 }
 816
 817
 818 void GuiWorkArea::inputMethodEvent(QInputMethodEvent * e)
 819 {
 820         QString const & commit_string = e->commitString();
 821         docstring const & preedit_string
 822                 = qstring_to_ucs4(e->preeditString());
 823
 824         if (!commit_string.isEmpty()) {
 825
 826                 LYXERR(Debug::KEY, "preeditString: " << fromqstr(e->preeditString())
 827                         << " commitString: " << fromqstr(e->commitString()));
 828
 829                 int key = 0;
 830
 831                 // FIXME Iwami 04/01/07: we should take care also of UTF16 surrogates here.
 832                 for (int i = 0; i != commit_string.size(); ++i) {
 833                         QKeyEvent ev(QEvent::KeyPress, key, Qt::NoModifier, commit_string[i]);
 834                         keyPressEvent(&ev);
 835                 }
 836         }
 837
 838         // Hide the cursor during the kana-kanji transformation.
 839         if (preedit_string.empty())
 840                 startBlinkingCursor();
 841         else
 842                 stopBlinkingCursor();
 843
 844         // last_width : for checking if last preedit string was/wasn't empty.
 845         static bool last_width = false;
 846         if (!last_width && preedit_string.empty()) {
 847                 // if last_width is last length of preedit string.
 848                 e->accept();
 849                 return;
 850         }
 851
 852         GuiPainter pain(&screen_);
 853         buffer_view_->updateMetrics();
 854         buffer_view_->draw(pain);
 855         FontInfo font = buffer_view_->cursor().getFont().fontInfo();
 856         FontMetrics const & fm = theFontMetrics(font);
 857         int height = fm.maxHeight();
 858         int cur_x = cursor_->rect().left();
 859         int cur_y = cursor_->rect().bottom();
 860
 861         // redraw area of preedit string.
 862         update(0, cur_y - height, viewport()->width(),
 863                 (height + 1) * preedit_lines_);
 864
 865         if (preedit_string.empty()) {
 866                 last_width = false;
 867                 preedit_lines_ = 1;
 868                 e->accept();
 869                 return;
 870         }
 871         last_width = true;
 872
 873         // att : stores an IM attribute.
 874         QList<QInputMethodEvent::Attribute> const & att = e->attributes();
 875
 876         // get attributes of input method cursor.
 877         // cursor_pos : cursor position in preedit string.
 878         size_t cursor_pos = 0;
 879         bool cursor_is_visible = false;
 880         for (int i = 0; i != att.size(); ++i) {
 881                 if (att.at(i).type == QInputMethodEvent::Cursor) {
 882                         cursor_pos = att.at(i).start;
 883                         cursor_is_visible = att.at(i).length != 0;
 884                         break;
 885                 }
 886         }
 887
 888         size_t preedit_length = preedit_string.length();
 889
 890         // get position of selection in input method.
 891         // FIXME: isn't there a way to do this simplier?
 892         // rStart : cursor position in selected string in IM.
 893         size_t rStart = 0;
 894         // rLength : selected string length in IM.
 895         size_t rLength = 0;
 896         if (cursor_pos < preedit_length) {
 897                 for (int i = 0; i != att.size(); ++i) {
 898                         if (att.at(i).type == QInputMethodEvent::TextFormat) {
 899                                 if (att.at(i).start <= int(cursor_pos)
 900                                         && int(cursor_pos) < att.at(i).start + att.at(i).length) {
 901                                                 rStart = att.at(i).start;
 902                                                 rLength = att.at(i).length;
 903                                                 if (!cursor_is_visible)
 904                                                         cursor_pos += rLength;
 905                                                 break;
 906                                 }
 907                         }
 908                 }
 909         }
 910         else {
 911                 rStart = cursor_pos;
 912                 rLength = 0;
 913         }
 914
 915         int const right_margin = rightMargin();
 916         Painter::preedit_style ps;
 917         // Most often there would be only one line:
 918         preedit_lines_ = 1;
 919         for (size_t pos = 0; pos != preedit_length; ++pos) {
 920                 char_type const typed_char = preedit_string[pos];
 921                 // reset preedit string style
 922                 ps = Painter::preedit_default;
 923
 924                 // if we reached the right extremity of the screen, go to next line.
 925                 if (cur_x + fm.width(typed_char) > viewport()->width() - right_margin) {
 926                         cur_x = right_margin;
 927                         cur_y += height + 1;
 928                         ++preedit_lines_;
 929                 }
 930                 // preedit strings are displayed with dashed underline
 931                 // and partial strings are displayed white on black indicating
 932                 // that we are in selecting mode in the input method.
 933                 // FIXME: rLength == preedit_length is not a changing condition
 934                 // FIXME: should be put out of the loop.
 935                 if (pos >= rStart
 936                         && pos < rStart + rLength
 937                         && !(cursor_pos < rLength && rLength == preedit_length))
 938                         ps = Painter::preedit_selecting;
 939
 940                 if (pos == cursor_pos
 941                         && (cursor_pos < rLength && rLength == preedit_length))
 942                         ps = Painter::preedit_cursor;
 943
 944                 // draw one character and update cur_x.
 945                 cur_x += pain.preeditText(cur_x, cur_y, typed_char, font, ps);
 946         }
 947
 948         // update the preedit string screen area.
 949         update(0, cur_y - preedit_lines_*height, viewport()->width(),
 950                 (height + 1) * preedit_lines_);
 951
 952         // Don't forget to accept the event!
 953         e->accept();
 954 }
 955
 956
 957 QVariant GuiWorkArea::inputMethodQuery(Qt::InputMethodQuery query) const
 958 {
 959         QRect cur_r(0,0,0,0);
 960         switch (query) {
 961                 // this is the CJK-specific composition window position.
 962                 case Qt::ImMicroFocus:
 963                         cur_r = cursor_->rect();
 964                         if (preedit_lines_ != 1)
 965                                 cur_r.moveLeft(10);
 966                         cur_r.moveBottom(cur_r.bottom() + cur_r.height() * preedit_lines_);
 967                         // return lower right of cursor in LyX.
 968                         return cur_r;
 969                 default:
 970                         return QWidget::inputMethodQuery(query);
 971         }
 972 }
 973
 974
 975 void GuiWorkArea::updateWindowTitle()
 976 {
 977         docstring maximize_title;
 978         docstring minimize_title;
 979
 980         Buffer & buf = buffer_view_->buffer();
 981         FileName const fileName = buf.fileName();
 982         if (!fileName.empty()) {
 983                 maximize_title = fileName.displayName(30);
 984                 minimize_title = from_utf8(fileName.onlyFileName());
 985                 if (!buf.isClean()) {
 986                         maximize_title += _(" (changed)");
 987                         minimize_title += char_type('*');
 988                 }
 989                 if (buf.isReadonly())
 990                         maximize_title += _(" (read only)");
 991         }
 992
 993         QString title = windowTitle();
 994         QString new_title = toqstr(maximize_title);
 995         if (title == new_title)
 996                 return;
 997
 998         QWidget::setWindowTitle(new_title);
 999         QWidget::setWindowIconText(toqstr(minimize_title));
1000         titleChanged(this);
1001 }
1002
1003
1004 void GuiWorkArea::setReadOnly(bool)
1005 {
1006         updateWindowTitle();
1007         if (this == lyx_view_->currentWorkArea())
1008                 lyx_view_->updateBufferDependent(false);
1009 }
1010
1011
1012 ////////////////////////////////////////////////////////////////////
1013 //
1014 // TabWorkArea
1015 //
1016 ////////////////////////////////////////////////////////////////////
1017
1018 TabWorkArea::TabWorkArea(QWidget * parent) : QTabWidget(parent)
1019 {
1020         QPalette pal = palette();
1021         pal.setColor(QPalette::Active, QPalette::Button,
1022                 pal.color(QPalette::Active, QPalette::Window));
1023         pal.setColor(QPalette::Disabled, QPalette::Button,
1024                 pal.color(QPalette::Disabled, QPalette::Window));
1025         pal.setColor(QPalette::Inactive, QPalette::Button,
1026                 pal.color(QPalette::Inactive, QPalette::Window));
1027
1028         QToolButton * closeTabButton = new QToolButton(this);
1029     closeTabButton->setPalette(pal);
1030         closeTabButton->setIcon(QIcon(":/images/closetab.png"));
1031         closeTabButton->setText("Close");
1032         closeTabButton->setAutoRaise(true);
1033         closeTabButton->setCursor(Qt::ArrowCursor);
1034         closeTabButton->setToolTip(tr("Close tab"));
1035         closeTabButton->setEnabled(true);
1036
1037         QObject::connect(this, SIGNAL(currentChanged(int)),
1038                 this, SLOT(on_currentTabChanged(int)));
1039         QObject::connect(closeTabButton, SIGNAL(clicked()),
1040                 this, SLOT(closeCurrentTab()));
1041
1042         setCornerWidget(closeTabButton);
1043         setUsesScrollButtons(true);
1044 }
1045
1046
1047 void TabWorkArea::showBar(bool show)
1048 {
1049         tabBar()->setEnabled(show);
1050         tabBar()->setVisible(show);
1051 }
1052
1053
1054 GuiWorkArea * TabWorkArea::currentWorkArea()
1055 {
1056         if (count() == 0)
1057                 return 0;
1058
1059         GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(currentWidget());
1060         BOOST_ASSERT(wa);
1061         return wa;
1062 }
1063
1064
1065 GuiWorkArea * TabWorkArea::workArea(Buffer & buffer)
1066 {
1067         for (int i = 0; i != count(); ++i) {
1068                 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i));
1069                 BOOST_ASSERT(wa);
1070                 if (&wa->bufferView().buffer() == &buffer)
1071                         return wa;
1072         }
1073         return 0;
1074 }
1075
1076
1077 void TabWorkArea::closeAll()
1078 {
1079         while (count()) {
1080                 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(0));
1081                 BOOST_ASSERT(wa);
1082                 removeTab(0);
1083                 delete wa;
1084         }
1085 }
1086
1087
1088 bool TabWorkArea::setCurrentWorkArea(GuiWorkArea * work_area)
1089 {
1090         BOOST_ASSERT(work_area);
1091         int index = indexOf(work_area);
1092         if (index == -1)
1093                 return false;
1094
1095         if (index == currentIndex())
1096                 // Make sure the work area is up to date.
1097                 on_currentTabChanged(index);
1098         else
1099                 // Switch to the work area.
1100                 setCurrentIndex(index);
1101         work_area->setFocus();
1102
1103         return true;
1104 }
1105
1106
1107 GuiWorkArea * TabWorkArea::addWorkArea(Buffer & buffer, GuiView & view)
1108 {
1109         GuiWorkArea * wa = new GuiWorkArea(buffer, view);
1110         wa->setUpdatesEnabled(false);
1111         // Hide tabbar if there's no tab (avoid a resize and a flashing tabbar
1112         // when hiding it again below).
1113         showBar(count() > 0);
1114         addTab(wa, wa->windowTitle());
1115         QObject::connect(wa, SIGNAL(titleChanged(GuiWorkArea *)),
1116                 this, SLOT(updateTabText(GuiWorkArea *)));
1117         // Hide tabbar if there's only one tab.
1118         showBar(count() > 1);
1119         return wa;
1120 }
1121
1122
1123 bool TabWorkArea::removeWorkArea(GuiWorkArea * work_area)
1124 {
1125         BOOST_ASSERT(work_area);
1126         int index = indexOf(work_area);
1127         if (index == -1)
1128                 return false;
1129
1130         work_area->setUpdatesEnabled(false);
1131         removeTab(index);
1132         delete work_area;
1133
1134         if (count()) {
1135                 // make sure the next work area is enabled.
1136                 currentWidget()->setUpdatesEnabled(true);
1137                 // Hide tabbar if there's only one tab.
1138                 showBar(count() > 1);
1139         }
1140         return true;
1141 }
1142
1143
1144 void TabWorkArea::on_currentTabChanged(int i)
1145 {
1146         GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i));
1147         BOOST_ASSERT(wa);
1148         BufferView & bv = wa->bufferView();
1149         bv.cursor().fixIfBroken();
1150         bv.updateMetrics();
1151         wa->setUpdatesEnabled(true);
1152         wa->redraw();
1153         wa->setFocus();
1154         ///
1155         currentWorkAreaChanged(wa);
1156
1157         LYXERR(Debug::GUI, "currentTabChanged " << i
1158                 << "File" << bv.buffer().absFileName());
1159 }
1160
1161
1162 void TabWorkArea::closeCurrentTab()
1163 {
1164         lyx::dispatch(FuncRequest(LFUN_BUFFER_CLOSE));
1165 }
1166
1167
1168 void TabWorkArea::updateTabText(GuiWorkArea * wa)
1169 {
1170         int const i = indexOf(wa);
1171         if (i < 0)
1172                 return;
1173         setTabText(i, wa->windowTitle());
1174 }
1175
1176 } // namespace frontend
1177 } // namespace lyx
1178
1179 #include "GuiWorkArea_moc.cpp"