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
  43 #include "frontends/Application.h"
  44 #include "frontends/FontMetrics.h"
  45 #include "frontends/WorkAreaManager.h"
  46
  47 #include <QContextMenuEvent>
  48 #include <QInputContext>
  49 #include <QHelpEvent>
  50 #include <QMainWindow>
  51 #include <QPainter>
  52 #include <QPalette>
  53 #include <QScrollBar>
  54 #include <QTabBar>
  55 #include <QTimer>
  56 #include <QToolButton>
  57 #include <QToolTip>
  58
  59 #include <boost/bind.hpp>
  60
  61 #ifdef Q_WS_X11
  62 #include <QX11Info>
  63 extern "C" int XEventsQueued(Display *display, int mode);
  64 #endif
  65
  66 #ifdef Q_WS_WIN
  67 int const CursorWidth = 2;
  68 #else
  69 int const CursorWidth = 1;
  70 #endif
  71
  72 #undef KeyPress
  73 #undef NoModifier
  74
  75 using namespace std;
  76 using namespace lyx::support;
  77
  78 namespace lyx {
  79
  80
  81 /// return the LyX mouse button state from Qt's
  82 static mouse_button::state q_button_state(Qt::MouseButton button)
  83 {
  84         mouse_button::state b = mouse_button::none;
  85         switch (button) {
  86                 case Qt::LeftButton:
  87                         b = mouse_button::button1;
  88                         break;
  89                 case Qt::MidButton:
  90                         b = mouse_button::button2;
  91                         break;
  92                 case Qt::RightButton:
  93                         b = mouse_button::button3;
  94                         break;
  95                 default:
  96                         break;
  97         }
  98         return b;
  99 }
 100
 101
 102 /// return the LyX mouse button state from Qt's
 103 mouse_button::state q_motion_state(Qt::MouseButtons state)
 104 {
 105         mouse_button::state b = mouse_button::none;
 106         if (state & Qt::LeftButton)
 107                 b |= mouse_button::button1;
 108         if (state & Qt::MidButton)
 109                 b |= mouse_button::button2;
 110         if (state & Qt::RightButton)
 111                 b |= mouse_button::button3;
 112         return b;
 113 }
 114
 115
 116 namespace frontend {
 117
 118 class CursorWidget {
 119 public:
 120         CursorWidget() {}
 121
 122         void draw(QPainter & painter)
 123         {
 124                 if (show_ && rect_.isValid()) {
 125                         switch (shape_) {
 126                         case L_SHAPE:
 127                                 painter.fillRect(rect_.x(), rect_.y(), CursorWidth, rect_.height(), color_);
 128                                 painter.setPen(color_);
 129                                 painter.drawLine(rect_.bottomLeft().x() + CursorWidth, rect_.bottomLeft().y(),
 130                                                                                                  rect_.bottomRight().x(), rect_.bottomLeft().y());
 131                                 break;
 132
 133                         case REVERSED_L_SHAPE:
 134                                 painter.fillRect(rect_.x() + rect_.height() / 3, rect_.y(), CursorWidth, rect_.height(), color_);
 135                                 painter.setPen(color_);
 136                                 painter.drawLine(rect_.bottomRight().x() - CursorWidth, rect_.bottomLeft().y(),
 137                                                                                                          rect_.bottomLeft().x(), rect_.bottomLeft().y());
 138                                 break;
 139
 140                         default:
 141                                 painter.fillRect(rect_, color_);
 142                                 break;
 143                         }
 144                 }
 145         }
 146
 147         void update(int x, int y, int h, CursorShape shape)
 148         {
 149                 color_ = guiApp->colorCache().get(Color_cursor);
 150                 shape_ = shape;
 151                 switch (shape) {
 152                 case L_SHAPE:
 153                         rect_ = QRect(x, y, CursorWidth + h / 3, h);
 154                         break;
 155                 case REVERSED_L_SHAPE:
 156                         rect_ = QRect(x - h / 3, y, CursorWidth + h / 3, h);
 157                         break;
 158                 default:
 159                         rect_ = QRect(x, y, CursorWidth, h);
 160                         break;
 161                 }
 162         }
 163
 164         void show(bool set_show = true) { show_ = set_show; }
 165         void hide() { show_ = false; }
 166
 167         QRect const & rect() { return rect_; }
 168
 169 private:
 170         ///
 171         CursorShape shape_;
 172         ///
 173         bool show_;
 174         ///
 175         QColor color_;
 176         ///
 177         QRect rect_;
 178 };
 179
 180
 181 // This is a 'heartbeat' generating synthetic mouse move events when the
 182 // cursor is at the top or bottom edge of the viewport. One scroll per 0.2 s
 183 SyntheticMouseEvent::SyntheticMouseEvent()
 184         : timeout(200), restart_timeout(true),
 185           x_old(-1), y_old(-1), scrollbar_value_old(-1.0)
 186 {}
 187
 188
 189
 190 GuiWorkArea::GuiWorkArea(Buffer & buffer, GuiView & lv)
 191         : buffer_view_(new BufferView(buffer)), lyx_view_(&lv),
 192           cursor_visible_(false),
 193     need_resize_(false), schedule_redraw_(false),
 194                 preedit_lines_(1)
 195 {
 196         buffer.workAreaManager().add(this);
 197         // Setup the signals
 198         connect(&cursor_timeout_, SIGNAL(timeout()),
 199                 this, SLOT(toggleCursor()));
 200
 201         int const time = QApplication::cursorFlashTime() / 2;
 202         if (time > 0) {
 203                 cursor_timeout_.setInterval(time);
 204                 cursor_timeout_.start();
 205         } else
 206                 // let's initialize this just to be safe
 207                 cursor_timeout_.setInterval(500);
 208
 209         screen_ = QPixmap(viewport()->width(), viewport()->height());
 210         cursor_ = new frontend::CursorWidget();
 211         cursor_->hide();
 212
 213         setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
 214         setAcceptDrops(true);
 215         setMouseTracking(true);
 216         setMinimumSize(100, 70);
 217         updateWindowTitle();
 218
 219         viewport()->setAutoFillBackground(false);
 220         // We don't need double-buffering nor SystemBackground on
 221         // the viewport because we have our own backing pixmap.
 222         viewport()->setAttribute(Qt::WA_NoSystemBackground);
 223
 224         setFocusPolicy(Qt::WheelFocus);
 225
 226         viewport()->setCursor(Qt::IBeamCursor);
 227
 228         synthetic_mouse_event_.timeout.timeout.connect(
 229                 boost::bind(&GuiWorkArea::generateSyntheticMouseEvent,
 230                                         this));
 231
 232         // Initialize the vertical Scroll Bar
 233         QObject::connect(verticalScrollBar(), SIGNAL(valueChanged(int)),
 234                 this, SLOT(scrollTo(int)));
 235
 236         LYXERR(Debug::GUI, "viewport width: " << viewport()->width()
 237                 << "  viewport height: " << viewport()->height());
 238
 239         // Enables input methods for asian languages.
 240         // Must be set when creating custom text editing widgets.
 241         setAttribute(Qt::WA_InputMethodEnabled, true);
 242 }
 243
 244
 245
 246 GuiWorkArea::~GuiWorkArea()
 247 {
 248         buffer_view_->buffer().workAreaManager().remove(this);
 249         delete buffer_view_;
 250         delete cursor_;
 251 }
 252
 253
 254 void GuiWorkArea::close()
 255 {
 256         lyx_view_->removeWorkArea(this);
 257 }
 258
 259
 260 void GuiWorkArea::setFullScreen(bool full_screen)
 261 {
 262         setFrameStyle(QFrame::NoFrame);
 263         buffer_view_->setFullScreen(full_screen);
 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         // the cursor gets restarted in GuiView::restartCursor()
 338         stopBlinkingCursor();
 339
 340         theLyXFunc().setLyXView(lyx_view_);
 341         theLyXFunc().processKeySym(key, mod);
 342
 343 }
 344
 345
 346 void GuiWorkArea::dispatch(FuncRequest const & cmd0, KeyModifier mod)
 347 {
 348         // Handle drag&drop
 349         if (cmd0.action == LFUN_FILE_OPEN) {
 350                 lyx_view_->dispatch(cmd0);
 351                 return;
 352         }
 353
 354         theLyXFunc().setLyXView(lyx_view_);
 355
 356         FuncRequest cmd;
 357
 358         if (cmd0.action == LFUN_MOUSE_PRESS) {
 359                 if (mod == ShiftModifier)
 360                         cmd = FuncRequest(cmd0, "region-select");
 361                 else if (mod == ControlModifier)
 362                         cmd = FuncRequest(cmd0, "paragraph-select");
 363                 else
 364                         cmd = cmd0;
 365         }
 366         else
 367                 cmd = cmd0;
 368
 369         bool const notJustMovingTheMouse =
 370                 cmd.action != LFUN_MOUSE_MOTION || cmd.button() != mouse_button::none;
 371
 372         // In order to avoid bad surprise in the middle of an operation, we better stop
 373         // the blinking cursor.
 374         if (notJustMovingTheMouse)
 375                 stopBlinkingCursor();
 376
 377         buffer_view_->mouseEventDispatch(cmd);
 378
 379         // Skip these when selecting
 380         if (cmd.action != LFUN_MOUSE_MOTION) {
 381                 lyx_view_->updateLayoutList();
 382                 lyx_view_->updateToolbars();
 383         }
 384
 385         // GUI tweaks except with mouse motion with no button pressed.
 386         if (notJustMovingTheMouse) {
 387                 // Slight hack: this is only called currently when we
 388                 // clicked somewhere, so we force through the display
 389                 // of the new status here.
 390                 lyx_view_->clearMessage();
 391
 392                 // Show the cursor immediately after any operation
 393                 startBlinkingCursor();
 394         }
 395 }
 396
 397
 398 void GuiWorkArea::resizeBufferView()
 399 {
 400         // WARNING: Please don't put any code that will trigger a repaint here!
 401         // We are already inside a paint event.
 402         lyx_view_->setBusy(true);
 403         buffer_view_->resize(viewport()->width(), viewport()->height());
 404         lyx_view_->updateLayoutList();
 405         lyx_view_->setBusy(false);
 406         need_resize_ = false;
 407 }
 408
 409
 410 void GuiWorkArea::showCursor()
 411 {
 412         if (cursor_visible_)
 413                 return;
 414
 415         CursorShape shape = BAR_SHAPE;
 416
 417         Font const & realfont = buffer_view_->cursor().real_current_font;
 418         BufferParams const & bp = buffer_view_->buffer().params();
 419         bool const samelang = realfont.language() == bp.language;
 420         bool const isrtl = realfont.isVisibleRightToLeft();
 421
 422         if (!samelang || isrtl != bp.language->rightToLeft()) {
 423                 shape = L_SHAPE;
 424                 if (isrtl)
 425                         shape = REVERSED_L_SHAPE;
 426         }
 427
 428         // The ERT language hack needs fixing up
 429         if (realfont.language() == latex_language)
 430                 shape = BAR_SHAPE;
 431
 432         Font const font = buffer_view_->cursor().getFont();
 433         FontMetrics const & fm = theFontMetrics(font);
 434         int const asc = fm.maxAscent();
 435         int const des = fm.maxDescent();
 436         int h = asc + des;
 437         int x = 0;
 438         int y = 0;
 439         buffer_view_->cursor().getPos(x, y);
 440         y -= asc;
 441
 442         // if it doesn't touch the screen, don't try to show it
 443         if (y + h < 0 || y >= viewport()->height())
 444                 return;
 445
 446         cursor_visible_ = true;
 447         showCursor(x, y, h, shape);
 448 }
 449
 450
 451 void GuiWorkArea::hideCursor()
 452 {
 453         if (!cursor_visible_)
 454                 return;
 455
 456         cursor_visible_ = false;
 457         removeCursor();
 458 }
 459
 460
 461 void GuiWorkArea::toggleCursor()
 462 {
 463         if (cursor_visible_)
 464                 hideCursor();
 465         else
 466                 showCursor();
 467 }
 468
 469
 470 void GuiWorkArea::updateScrollbar()
 471 {
 472         ScrollbarParameters const & scroll_ = buffer_view_->scrollbarParameters();
 473
 474         verticalScrollBar()->setRange(scroll_.min, scroll_.max);
 475         verticalScrollBar()->setPageStep(scroll_.page_step);
 476         verticalScrollBar()->setSingleStep(scroll_.single_step);
 477         // Block the scrollbar signal to prevent recursive signal/slot calling.
 478         verticalScrollBar()->blockSignals(true);
 479         verticalScrollBar()->setValue(scroll_.position);
 480         verticalScrollBar()->setSliderPosition(scroll_.position);
 481         verticalScrollBar()->blockSignals(false);
 482 }
 483
 484
 485 void GuiWorkArea::scrollTo(int value)
 486 {
 487         stopBlinkingCursor();
 488         buffer_view_->scrollDocView(value);
 489
 490         if (lyxrc.cursor_follows_scrollbar) {
 491                 buffer_view_->setCursorFromScrollbar();
 492                 lyx_view_->updateLayoutList();
 493         }
 494         // Show the cursor immediately after any operation.
 495         startBlinkingCursor();
 496         QApplication::syncX();
 497 }
 498
 499
 500 bool GuiWorkArea::event(QEvent * e)
 501 {
 502         switch (e->type()) {
 503         case QEvent::ToolTip: {
 504                 QHelpEvent * helpEvent = static_cast<QHelpEvent *>(e);
 505                 if (lyxrc.use_tooltip) {
 506                         QPoint pos = helpEvent->pos();
 507                         if (pos.x() < viewport()->width()) {
 508                                 QString s = toqstr(buffer_view_->toolTip(pos.x(), pos.y()));
 509                                 QToolTip::showText(helpEvent->globalPos(), s);
 510                         }
 511                         else
 512                                 QToolTip::hideText();
 513                 }
 514                 // Don't forget to accept the event!
 515                 e->accept();
 516                 return true;
 517         }
 518
 519         case QEvent::ShortcutOverride: {
 520                 // We catch this event in order to catch the Tab or Shift+Tab key press
 521                 // which are otherwise reserved to focus switching between controls
 522                 // within a dialog.
 523                 QKeyEvent * ke = static_cast<QKeyEvent*>(e);
 524                 if ((ke->key() != Qt::Key_Tab && ke->key() != Qt::Key_Backtab)
 525                         || ke->modifiers() & Qt::ControlModifier)
 526                         return QAbstractScrollArea::event(e);
 527                 keyPressEvent(ke);
 528                 return true;
 529         }
 530
 531         default:
 532                 return QAbstractScrollArea::event(e);
 533         }
 534         return false;
 535 }
 536
 537
 538 void GuiWorkArea::contextMenuEvent(QContextMenuEvent * e)
 539 {
 540         QPoint pos = e->pos();
 541         docstring name = buffer_view_->contextMenu(pos.x(), pos.y());
 542         if (name.empty()) {
 543                 QAbstractScrollArea::contextMenuEvent(e);
 544                 return;
 545         }
 546         QMenu * menu = guiApp->menus().menu(toqstr(name));
 547         if (!menu) {
 548                 QAbstractScrollArea::contextMenuEvent(e);
 549                 return;
 550         }
 551         // Position the menu to the right.
 552         // FIXME: menu position should be different for RTL text.
 553         menu->exec(e->globalPos());
 554         e->accept();
 555 }
 556
 557
 558 void GuiWorkArea::focusInEvent(QFocusEvent * /*event*/)
 559 {
 560         // Repaint the whole screen.
 561         // Note: this is different from redraw() as only the backing pixmap
 562         // will be redrawn, which is cheap.
 563         viewport()->repaint();
 564
 565         startBlinkingCursor();
 566 }
 567
 568
 569 void GuiWorkArea::focusOutEvent(QFocusEvent * /*event*/)
 570 {
 571         stopBlinkingCursor();
 572 }
 573
 574
 575 void GuiWorkArea::mousePressEvent(QMouseEvent * e)
 576 {
 577         if (dc_event_.active && dc_event_ == *e) {
 578                 dc_event_.active = false;
 579                 FuncRequest cmd(LFUN_MOUSE_TRIPLE, e->x(), e->y(),
 580                         q_button_state(e->button()));
 581                 dispatch(cmd);
 582                 return;
 583         }
 584
 585         inputContext()->reset();
 586
 587         FuncRequest const cmd(LFUN_MOUSE_PRESS, e->x(), e->y(),
 588                 q_button_state(e->button()));
 589         dispatch(cmd, q_key_state(e->modifiers()));
 590 }
 591
 592
 593 void GuiWorkArea::mouseReleaseEvent(QMouseEvent * e)
 594 {
 595         if (synthetic_mouse_event_.timeout.running())
 596                 synthetic_mouse_event_.timeout.stop();
 597
 598         FuncRequest const cmd(LFUN_MOUSE_RELEASE, e->x(), e->y(),
 599                               q_button_state(e->button()));
 600         dispatch(cmd);
 601 }
 602
 603
 604 void GuiWorkArea::mouseMoveEvent(QMouseEvent * e)
 605 {
 606         // we kill the triple click if we move
 607         doubleClickTimeout();
 608         FuncRequest cmd(LFUN_MOUSE_MOTION, e->x(), e->y(),
 609                 q_motion_state(e->buttons()));
 610
 611         // If we're above or below the work area...
 612         if (e->y() <= 20 || e->y() >= viewport()->height() - 20) {
 613                 // Make sure only a synthetic event can cause a page scroll,
 614                 // so they come at a steady rate:
 615                 if (e->y() <= 20)
 616                         // _Force_ a scroll up:
 617                         cmd.y = -40;
 618                 else
 619                         cmd.y = viewport()->height();
 620                 // Store the event, to be handled when the timeout expires.
 621                 synthetic_mouse_event_.cmd = cmd;
 622
 623                 if (synthetic_mouse_event_.timeout.running())
 624                         // Discard the event. Note that it _may_ be handled
 625                         // when the timeout expires if
 626                         // synthetic_mouse_event_.cmd has not been overwritten.
 627                         // Ie, when the timeout expires, we handle the
 628                         // most recent event but discard all others that
 629                         // occurred after the one used to start the timeout
 630                         // in the first place.
 631                         return;
 632
 633                 synthetic_mouse_event_.restart_timeout = true;
 634                 synthetic_mouse_event_.timeout.start();
 635                 // Fall through to handle this event...
 636
 637         } else if (synthetic_mouse_event_.timeout.running()) {
 638                 // Store the event, to be possibly handled when the timeout
 639                 // expires.
 640                 // Once the timeout has expired, normal control is returned
 641                 // to mouseMoveEvent (restart_timeout = false).
 642                 // This results in a much smoother 'feel' when moving the
 643                 // mouse back into the work area.
 644                 synthetic_mouse_event_.cmd = cmd;
 645                 synthetic_mouse_event_.restart_timeout = false;
 646                 return;
 647         }
 648
 649         // Has anything changed on-screen since the last QMouseEvent
 650         // was received?
 651         double const scrollbar_value = verticalScrollBar()->value();
 652         if (e->x() == synthetic_mouse_event_.x_old
 653                 && e->y() == synthetic_mouse_event_.y_old
 654                 && scrollbar_value == synthetic_mouse_event_.scrollbar_value_old) {
 655                 // Nothing changed on-screen since the last QMouseEvent.
 656                 return;
 657         }
 658
 659         // Yes something has changed. Store the params used to check this.
 660         synthetic_mouse_event_.x_old = e->x();
 661         synthetic_mouse_event_.y_old = e->y();
 662         synthetic_mouse_event_.scrollbar_value_old = scrollbar_value;
 663
 664         // ... and dispatch the event to the LyX core.
 665         dispatch(cmd);
 666 }
 667
 668
 669 void GuiWorkArea::wheelEvent(QWheelEvent * e)
 670 {
 671         // Wheel rotation by one notch results in a delta() of 120 (see
 672         // documentation of QWheelEvent)
 673         double const lines = qApp->wheelScrollLines()
 674                 * lyxrc.mouse_wheel_speed
 675                 * e->delta() / 120.0;
 676         LYXERR(Debug::SCROLLING, "wheelScrollLines = " << qApp->wheelScrollLines()
 677                 << " delta = " << e->delta()
 678                 << " lines = " << lines);
 679         verticalScrollBar()->setValue(verticalScrollBar()->value() -
 680                 int(lines *  verticalScrollBar()->singleStep()));
 681 }
 682
 683
 684 void GuiWorkArea::generateSyntheticMouseEvent()
 685 {
 686         // Set things off to generate the _next_ 'pseudo' event.
 687         if (synthetic_mouse_event_.restart_timeout)
 688                 synthetic_mouse_event_.timeout.start();
 689
 690         // Has anything changed on-screen since the last timeout signal
 691         // was received?
 692         double const scrollbar_value = verticalScrollBar()->value();
 693         if (scrollbar_value != synthetic_mouse_event_.scrollbar_value_old) {
 694                 // Yes it has. Store the params used to check this.
 695                 synthetic_mouse_event_.scrollbar_value_old = scrollbar_value;
 696
 697                 // ... and dispatch the event to the LyX core.
 698                 dispatch(synthetic_mouse_event_.cmd);
 699         }
 700 }
 701
 702
 703 void GuiWorkArea::keyPressEvent(QKeyEvent * ev)
 704 {
 705         // do nothing if there are other events
 706         // (the auto repeated events come too fast)
 707         // \todo FIXME: remove hard coded Qt keys, process the key binding
 708 #ifdef Q_WS_X11
 709         if (XEventsQueued(QX11Info::display(), 0) > 1 && ev->isAutoRepeat()
 710                         && (Qt::Key_PageDown || Qt::Key_PageUp)) {
 711                 LYXERR(Debug::KEY, "system is busy: scroll key event ignored");
 712                 ev->ignore();
 713                 return;
 714         }
 715 #endif
 716
 717         LYXERR(Debug::KEY, " count: " << ev->count()
 718                 << " text: " << fromqstr(ev->text())
 719                 << " isAutoRepeat: " << ev->isAutoRepeat() << " key: " << ev->key());
 720
 721         KeySymbol sym;
 722         setKeySymbol(&sym, ev);
 723         processKeySym(sym, q_key_state(ev->modifiers()));
 724         ev->accept();
 725 }
 726
 727
 728 void GuiWorkArea::doubleClickTimeout()
 729 {
 730         dc_event_.active = false;
 731 }
 732
 733
 734 void GuiWorkArea::mouseDoubleClickEvent(QMouseEvent * ev)
 735 {
 736         dc_event_ = DoubleClick(ev);
 737         QTimer::singleShot(QApplication::doubleClickInterval(), this,
 738                            SLOT(doubleClickTimeout()));
 739         FuncRequest cmd(LFUN_MOUSE_DOUBLE,
 740                         ev->x(), ev->y(),
 741                         q_button_state(ev->button()));
 742         dispatch(cmd);
 743 }
 744
 745
 746 void GuiWorkArea::resizeEvent(QResizeEvent * ev)
 747 {
 748         QAbstractScrollArea::resizeEvent(ev);
 749         need_resize_ = true;
 750 }
 751
 752
 753 void GuiWorkArea::update(int x, int y, int w, int h)
 754 {
 755         viewport()->repaint(x, y, w, h);
 756 }
 757
 758
 759 void GuiWorkArea::paintEvent(QPaintEvent * ev)
 760 {
 761         QRect const rc = ev->rect();
 762         // LYXERR(Debug::PAINTING, "paintEvent begin: x: " << rc.x()
 763         //      << " y: " << rc.y() << " w: " << rc.width() << " h: " << rc.height());
 764
 765         if (need_resize_) {
 766                 screen_ = QPixmap(viewport()->width(), viewport()->height());
 767                 resizeBufferView();
 768
 769                 // Update scrollbars which might have changed due different
 770                 // BufferView dimension. This is especially important when the
 771                 // BufferView goes from zero-size to the real-size for the first time,
 772                 // as the scrollbar paramters are then set for the first time.
 773                 updateScrollbar();
 774                 BOOST_ASSERT(need_resize_ == false);
 775
 776                 updateScreen();
 777                 hideCursor();
 778                 showCursor();
 779         }
 780
 781         QPainter pain(viewport());
 782         pain.drawPixmap(rc, screen_, rc);
 783         cursor_->draw(pain);
 784 }
 785
 786
 787 void GuiWorkArea::updateScreen()
 788 {
 789         GuiPainter pain(&screen_);
 790         buffer_view_->draw(pain);
 791 }
 792
 793
 794 void GuiWorkArea::showCursor(int x, int y, int h, CursorShape shape)
 795 {
 796         if (schedule_redraw_) {
 797                 buffer_view_->updateMetrics();
 798                 updateScreen();
 799                 viewport()->update(QRect(0, 0, viewport()->width(), viewport()->height()));
 800                 schedule_redraw_ = false;
 801                 // Show the cursor immediately after the update.
 802                 hideCursor();
 803                 toggleCursor();
 804                 return;
 805         }
 806
 807         cursor_->update(x, y, h, shape);
 808         cursor_->show();
 809         viewport()->update(cursor_->rect());
 810 }
 811
 812
 813 void GuiWorkArea::removeCursor()
 814 {
 815         cursor_->hide();
 816         //if (!qApp->focusWidget())
 817                 viewport()->update(cursor_->rect());
 818 }
 819
 820
 821 void GuiWorkArea::inputMethodEvent(QInputMethodEvent * e)
 822 {
 823         QString const & commit_string = e->commitString();
 824         docstring const & preedit_string
 825                 = qstring_to_ucs4(e->preeditString());
 826
 827         if (!commit_string.isEmpty()) {
 828
 829                 LYXERR(Debug::KEY, "preeditString: " << fromqstr(e->preeditString())
 830                         << " commitString: " << fromqstr(e->commitString()));
 831
 832                 int key = 0;
 833
 834                 // FIXME Iwami 04/01/07: we should take care also of UTF16 surrogates here.
 835                 for (int i = 0; i != commit_string.size(); ++i) {
 836                         QKeyEvent ev(QEvent::KeyPress, key, Qt::NoModifier, commit_string[i]);
 837                         keyPressEvent(&ev);
 838                 }
 839         }
 840
 841         // Hide the cursor during the kana-kanji transformation.
 842         if (preedit_string.empty())
 843                 startBlinkingCursor();
 844         else
 845                 stopBlinkingCursor();
 846
 847         // last_width : for checking if last preedit string was/wasn't empty.
 848         static bool last_width = false;
 849         if (!last_width && preedit_string.empty()) {
 850                 // if last_width is last length of preedit string.
 851                 e->accept();
 852                 return;
 853         }
 854
 855         GuiPainter pain(&screen_);
 856         buffer_view_->updateMetrics();
 857         buffer_view_->draw(pain);
 858         FontInfo font = buffer_view_->cursor().getFont().fontInfo();
 859         FontMetrics const & fm = theFontMetrics(font);
 860         int height = fm.maxHeight();
 861         int cur_x = cursor_->rect().left();
 862         int cur_y = cursor_->rect().bottom();
 863
 864         // redraw area of preedit string.
 865         update(0, cur_y - height, viewport()->width(),
 866                 (height + 1) * preedit_lines_);
 867
 868         if (preedit_string.empty()) {
 869                 last_width = false;
 870                 preedit_lines_ = 1;
 871                 e->accept();
 872                 return;
 873         }
 874         last_width = true;
 875
 876         // att : stores an IM attribute.
 877         QList<QInputMethodEvent::Attribute> const & att = e->attributes();
 878
 879         // get attributes of input method cursor.
 880         // cursor_pos : cursor position in preedit string.
 881         size_t cursor_pos = 0;
 882         bool cursor_is_visible = false;
 883         for (int i = 0; i != att.size(); ++i) {
 884                 if (att.at(i).type == QInputMethodEvent::Cursor) {
 885                         cursor_pos = att.at(i).start;
 886                         cursor_is_visible = att.at(i).length != 0;
 887                         break;
 888                 }
 889         }
 890
 891         size_t preedit_length = preedit_string.length();
 892
 893         // get position of selection in input method.
 894         // FIXME: isn't there a way to do this simplier?
 895         // rStart : cursor position in selected string in IM.
 896         size_t rStart = 0;
 897         // rLength : selected string length in IM.
 898         size_t rLength = 0;
 899         if (cursor_pos < preedit_length) {
 900                 for (int i = 0; i != att.size(); ++i) {
 901                         if (att.at(i).type == QInputMethodEvent::TextFormat) {
 902                                 if (att.at(i).start <= int(cursor_pos)
 903                                         && int(cursor_pos) < att.at(i).start + att.at(i).length) {
 904                                                 rStart = att.at(i).start;
 905                                                 rLength = att.at(i).length;
 906                                                 if (!cursor_is_visible)
 907                                                         cursor_pos += rLength;
 908                                                 break;
 909                                 }
 910                         }
 911                 }
 912         }
 913         else {
 914                 rStart = cursor_pos;
 915                 rLength = 0;
 916         }
 917
 918         int const right_margin = buffer_view_->rightMargin();
 919         Painter::preedit_style ps;
 920         // Most often there would be only one line:
 921         preedit_lines_ = 1;
 922         for (size_t pos = 0; pos != preedit_length; ++pos) {
 923                 char_type const typed_char = preedit_string[pos];
 924                 // reset preedit string style
 925                 ps = Painter::preedit_default;
 926
 927                 // if we reached the right extremity of the screen, go to next line.
 928                 if (cur_x + fm.width(typed_char) > viewport()->width() - right_margin) {
 929                         cur_x = right_margin;
 930                         cur_y += height + 1;
 931                         ++preedit_lines_;
 932                 }
 933                 // preedit strings are displayed with dashed underline
 934                 // and partial strings are displayed white on black indicating
 935                 // that we are in selecting mode in the input method.
 936                 // FIXME: rLength == preedit_length is not a changing condition
 937                 // FIXME: should be put out of the loop.
 938                 if (pos >= rStart
 939                         && pos < rStart + rLength
 940                         && !(cursor_pos < rLength && rLength == preedit_length))
 941                         ps = Painter::preedit_selecting;
 942
 943                 if (pos == cursor_pos
 944                         && (cursor_pos < rLength && rLength == preedit_length))
 945                         ps = Painter::preedit_cursor;
 946
 947                 // draw one character and update cur_x.
 948                 cur_x += pain.preeditText(cur_x, cur_y, typed_char, font, ps);
 949         }
 950
 951         // update the preedit string screen area.
 952         update(0, cur_y - preedit_lines_*height, viewport()->width(),
 953                 (height + 1) * preedit_lines_);
 954
 955         // Don't forget to accept the event!
 956         e->accept();
 957 }
 958
 959
 960 QVariant GuiWorkArea::inputMethodQuery(Qt::InputMethodQuery query) const
 961 {
 962         QRect cur_r(0,0,0,0);
 963         switch (query) {
 964                 // this is the CJK-specific composition window position.
 965                 case Qt::ImMicroFocus:
 966                         cur_r = cursor_->rect();
 967                         if (preedit_lines_ != 1)
 968                                 cur_r.moveLeft(10);
 969                         cur_r.moveBottom(cur_r.bottom() + cur_r.height() * preedit_lines_);
 970                         // return lower right of cursor in LyX.
 971                         return cur_r;
 972                 default:
 973                         return QWidget::inputMethodQuery(query);
 974         }
 975 }
 976
 977
 978 void GuiWorkArea::updateWindowTitle()
 979 {
 980         docstring maximize_title;
 981         docstring minimize_title;
 982
 983         Buffer & buf = buffer_view_->buffer();
 984         FileName const fileName = buf.fileName();
 985         if (!fileName.empty()) {
 986                 maximize_title = fileName.displayName(30);
 987                 minimize_title = from_utf8(fileName.onlyFileName());
 988                 if (!buf.isClean()) {
 989                         maximize_title += _(" (changed)");
 990                         minimize_title += char_type('*');
 991                 }
 992                 if (buf.isReadonly())
 993                         maximize_title += _(" (read only)");
 994         }
 995
 996         QString title = windowTitle();
 997         QString new_title = toqstr(maximize_title);
 998         if (title == new_title)
 999                 return;
1000
1001         QWidget::setWindowTitle(new_title);
1002         QWidget::setWindowIconText(toqstr(minimize_title));
1003         titleChanged(this);
1004 }
1005
1006
1007 void GuiWorkArea::setReadOnly(bool)
1008 {
1009         updateWindowTitle();
1010         if (this == lyx_view_->currentWorkArea())
1011                 lyx_view_->updateBufferDependent(false);
1012 }
1013
1014
1015 ////////////////////////////////////////////////////////////////////
1016 //
1017 // TabWorkArea
1018 //
1019 ////////////////////////////////////////////////////////////////////
1020
1021 TabWorkArea::TabWorkArea(QWidget * parent) : QTabWidget(parent)
1022 {
1023         QPalette pal = palette();
1024         pal.setColor(QPalette::Active, QPalette::Button,
1025                 pal.color(QPalette::Active, QPalette::Window));
1026         pal.setColor(QPalette::Disabled, QPalette::Button,
1027                 pal.color(QPalette::Disabled, QPalette::Window));
1028         pal.setColor(QPalette::Inactive, QPalette::Button,
1029                 pal.color(QPalette::Inactive, QPalette::Window));
1030
1031         QToolButton * closeTabButton = new QToolButton(this);
1032     closeTabButton->setPalette(pal);
1033         closeTabButton->setIcon(QIcon(":/images/closetab.png"));
1034         closeTabButton->setText("Close");
1035         closeTabButton->setAutoRaise(true);
1036         closeTabButton->setCursor(Qt::ArrowCursor);
1037         closeTabButton->setToolTip(tr("Close tab"));
1038         closeTabButton->setEnabled(true);
1039
1040         QObject::connect(this, SIGNAL(currentChanged(int)),
1041                 this, SLOT(on_currentTabChanged(int)));
1042         QObject::connect(closeTabButton, SIGNAL(clicked()),
1043                 this, SLOT(closeCurrentTab()));
1044
1045         setCornerWidget(closeTabButton);
1046         setUsesScrollButtons(true);
1047 }
1048
1049
1050 void TabWorkArea::setFullScreen(bool full_screen)
1051 {
1052         for (int i = 0; i != count(); ++i) {
1053                 if (GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i)))
1054                         wa->setFullScreen(full_screen);
1055         }
1056 }
1057
1058
1059 void TabWorkArea::showBar(bool show)
1060 {
1061         tabBar()->setEnabled(show);
1062         tabBar()->setVisible(show);
1063 }
1064
1065
1066 GuiWorkArea * TabWorkArea::currentWorkArea()
1067 {
1068         if (count() == 0)
1069                 return 0;
1070
1071         GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(currentWidget());
1072         BOOST_ASSERT(wa);
1073         return wa;
1074 }
1075
1076
1077 GuiWorkArea * TabWorkArea::workArea(Buffer & buffer)
1078 {
1079         for (int i = 0; i != count(); ++i) {
1080                 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i));
1081                 BOOST_ASSERT(wa);
1082                 if (&wa->bufferView().buffer() == &buffer)
1083                         return wa;
1084         }
1085         return 0;
1086 }
1087
1088
1089 void TabWorkArea::closeAll()
1090 {
1091         while (count()) {
1092                 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(0));
1093                 BOOST_ASSERT(wa);
1094                 removeTab(0);
1095                 delete wa;
1096         }
1097 }
1098
1099
1100 bool TabWorkArea::setCurrentWorkArea(GuiWorkArea * work_area)
1101 {
1102         BOOST_ASSERT(work_area);
1103         int index = indexOf(work_area);
1104         if (index == -1)
1105                 return false;
1106
1107         if (index == currentIndex())
1108                 // Make sure the work area is up to date.
1109                 on_currentTabChanged(index);
1110         else
1111                 // Switch to the work area.
1112                 setCurrentIndex(index);
1113         work_area->setFocus();
1114
1115         return true;
1116 }
1117
1118
1119 GuiWorkArea * TabWorkArea::addWorkArea(Buffer & buffer, GuiView & view)
1120 {
1121         GuiWorkArea * wa = new GuiWorkArea(buffer, view);
1122         wa->setUpdatesEnabled(false);
1123         // Hide tabbar if there's no tab (avoid a resize and a flashing tabbar
1124         // when hiding it again below).
1125         showBar(count() > 0);
1126         addTab(wa, wa->windowTitle());
1127         QObject::connect(wa, SIGNAL(titleChanged(GuiWorkArea *)),
1128                 this, SLOT(updateTabText(GuiWorkArea *)));
1129         // Hide tabbar if there's only one tab.
1130         showBar(count() > 1);
1131         return wa;
1132 }
1133
1134
1135 bool TabWorkArea::removeWorkArea(GuiWorkArea * work_area)
1136 {
1137         BOOST_ASSERT(work_area);
1138         int index = indexOf(work_area);
1139         if (index == -1)
1140                 return false;
1141
1142         work_area->setUpdatesEnabled(false);
1143         removeTab(index);
1144         delete work_area;
1145
1146         if (count()) {
1147                 // make sure the next work area is enabled.
1148                 currentWidget()->setUpdatesEnabled(true);
1149                 // Hide tabbar if there's only one tab.
1150                 showBar(count() > 1);
1151         }
1152         return true;
1153 }
1154
1155
1156 void TabWorkArea::on_currentTabChanged(int i)
1157 {
1158         GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i));
1159         BOOST_ASSERT(wa);
1160         BufferView & bv = wa->bufferView();
1161         bv.cursor().fixIfBroken();
1162         bv.updateMetrics();
1163         wa->setUpdatesEnabled(true);
1164         wa->redraw();
1165         wa->setFocus();
1166         ///
1167         currentWorkAreaChanged(wa);
1168
1169         LYXERR(Debug::GUI, "currentTabChanged " << i
1170                 << "File" << bv.buffer().absFileName());
1171 }
1172
1173
1174 void TabWorkArea::closeCurrentTab()
1175 {
1176         lyx::dispatch(FuncRequest(LFUN_BUFFER_CLOSE));
1177 }
1178
1179
1180 void TabWorkArea::updateTabText(GuiWorkArea * wa)
1181 {
1182         int const i = indexOf(wa);
1183         if (i < 0)
1184                 return;
1185         setTabText(i, wa->windowTitle());
1186 }
1187
1188 } // namespace frontend
1189 } // namespace lyx
1190
1191 #include "GuiWorkArea_moc.cpp"