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         setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
 211         setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
 212         setAcceptDrops(true);
 213         setMouseTracking(true);
 214         setMinimumSize(100, 70);
 215         updateWindowTitle();
 216
 217         viewport()->setAutoFillBackground(false);
 218         // We don't need double-buffering nor SystemBackground on
 219         // the viewport because we have our own backing pixmap.
 220         viewport()->setAttribute(Qt::WA_NoSystemBackground);
 221
 222         setFocusPolicy(Qt::WheelFocus);
 223
 224         viewport()->setCursor(Qt::IBeamCursor);
 225
 226         synthetic_mouse_event_.timeout.timeout.connect(
 227                 boost::bind(&GuiWorkArea::generateSyntheticMouseEvent,
 228                                         this));
 229
 230         // Initialize the vertical Scroll Bar
 231         QObject::connect(verticalScrollBar(), SIGNAL(actionTriggered(int)),
 232                 this, SLOT(adjustViewWithScrollBar(int)));
 233
 234         // disable context menu for the scrollbar
 235         verticalScrollBar()->setContextMenuPolicy(Qt::NoContextMenu);
 236
 237         // PageStep only depends on the viewport height.
 238         verticalScrollBar()->setPageStep(viewport()->height());
 239
 240         LYXERR(Debug::GUI, "viewport width: " << viewport()->width()
 241                 << "  viewport height: " << viewport()->height());
 242
 243         // Enables input methods for asian languages.
 244         // Must be set when creating custom text editing widgets.
 245         setAttribute(Qt::WA_InputMethodEnabled, true);
 246 }
 247
 248
 249
 250 GuiWorkArea::~GuiWorkArea()
 251 {
 252         buffer_view_->buffer().workAreaManager().remove(this);
 253         delete buffer_view_;
 254         delete cursor_;
 255 }
 256
 257
 258 void GuiWorkArea::close()
 259 {
 260         lyx_view_->removeWorkArea(this);
 261 }
 262
 263
 264 BufferView & GuiWorkArea::bufferView()
 265 {
 266         return *buffer_view_;
 267 }
 268
 269
 270 BufferView const & GuiWorkArea::bufferView() const
 271 {
 272         return *buffer_view_;
 273 }
 274
 275
 276 void GuiWorkArea::stopBlinkingCursor()
 277 {
 278         cursor_timeout_.stop();
 279         hideCursor();
 280 }
 281
 282
 283 void GuiWorkArea::startBlinkingCursor()
 284 {
 285         showCursor();
 286         cursor_timeout_.start();
 287 }
 288
 289
 290 void GuiWorkArea::redraw()
 291 {
 292         if (!isVisible())
 293                 // No need to redraw in this case.
 294                 return;
 295
 296         // No need to do anything if this is the current view. The BufferView
 297         // metrics are already up to date.
 298         if (lyx_view_ != guiApp->currentView()) {
 299                 // FIXME: it would be nice to optimize for the off-screen case.
 300                 buffer_view_->updateMetrics();
 301                 buffer_view_->cursor().fixIfBroken();
 302         }
 303
 304         // update cursor position, because otherwise it has to wait until
 305         // the blinking interval is over
 306         if (cursor_visible_) {
 307                 hideCursor();
 308                 showCursor();
 309         }
 310
 311         LYXERR(Debug::WORKAREA, "WorkArea::redraw screen");
 312         updateScreen();
 313         update(0, 0, viewport()->width(), viewport()->height());
 314
 315         /// \warning: scrollbar updating *must* be done after the BufferView is drawn
 316         /// because \c BufferView::updateScrollbar() is called in \c BufferView::draw().
 317         updateScrollbar();
 318         lyx_view_->updateStatusBar();
 319
 320         if (lyxerr.debugging(Debug::WORKAREA))
 321                 buffer_view_->coordCache().dump();
 322 }
 323
 324
 325 void GuiWorkArea::processKeySym(KeySymbol const & key, KeyModifier mod)
 326 {
 327         // In order to avoid bad surprise in the middle of an operation,
 328         // we better stop the blinking cursor.
 329         stopBlinkingCursor();
 330
 331         theLyXFunc().setLyXView(lyx_view_);
 332         theLyXFunc().processKeySym(key, mod);
 333 }
 334
 335
 336 void GuiWorkArea::dispatch(FuncRequest const & cmd0, KeyModifier mod)
 337 {
 338         // Handle drag&drop
 339         if (cmd0.action == LFUN_FILE_OPEN) {
 340                 lyx_view_->dispatch(cmd0);
 341                 return;
 342         }
 343
 344         theLyXFunc().setLyXView(lyx_view_);
 345
 346         FuncRequest cmd;
 347
 348         if (cmd0.action == LFUN_MOUSE_PRESS) {
 349                 if (mod == ShiftModifier)
 350                         cmd = FuncRequest(cmd0, "region-select");
 351                 else if (mod == ControlModifier)
 352                         cmd = FuncRequest(cmd0, "paragraph-select");
 353                 else
 354                         cmd = cmd0;
 355         }
 356         else
 357                 cmd = cmd0;
 358
 359         // In order to avoid bad surprise in the middle of an operation, we better stop
 360         // the blinking cursor.
 361         if (!(cmd.action == LFUN_MOUSE_MOTION
 362                 && cmd.button() == mouse_button::none))
 363                 stopBlinkingCursor();
 364
 365         buffer_view_->mouseEventDispatch(cmd);
 366
 367         // Skip these when selecting
 368         if (cmd.action != LFUN_MOUSE_MOTION) {
 369                 lyx_view_->updateLayoutList();
 370                 lyx_view_->updateToolbars();
 371         }
 372
 373         // GUI tweaks except with mouse motion with no button pressed.
 374         if (!(cmd.action == LFUN_MOUSE_MOTION
 375                 && cmd.button() == mouse_button::none)) {
 376                 // Slight hack: this is only called currently when we
 377                 // clicked somewhere, so we force through the display
 378                 // of the new status here.
 379                 lyx_view_->clearMessage();
 380
 381                 // Show the cursor immediately after any operation.
 382                 startBlinkingCursor();
 383         }
 384 }
 385
 386
 387 void GuiWorkArea::resizeBufferView()
 388 {
 389         // WARNING: Please don't put any code that will trigger a repaint here!
 390         // We are already inside a paint event.
 391         lyx_view_->setBusy(true);
 392         buffer_view_->resize(viewport()->width(), viewport()->height());
 393         lyx_view_->updateLayoutList();
 394         lyx_view_->setBusy(false);
 395         need_resize_ = false;
 396 }
 397
 398
 399 void GuiWorkArea::showCursor()
 400 {
 401         if (cursor_visible_)
 402                 return;
 403
 404         CursorShape shape = BAR_SHAPE;
 405
 406         Font const & realfont = buffer_view_->cursor().real_current_font;
 407         BufferParams const & bp = buffer_view_->buffer().params();
 408         bool const samelang = realfont.language() == bp.language;
 409         bool const isrtl = realfont.isVisibleRightToLeft();
 410
 411         if (!samelang || isrtl != bp.language->rightToLeft()) {
 412                 shape = L_SHAPE;
 413                 if (isrtl)
 414                         shape = REVERSED_L_SHAPE;
 415         }
 416
 417         // The ERT language hack needs fixing up
 418         if (realfont.language() == latex_language)
 419                 shape = BAR_SHAPE;
 420
 421         Font const font = buffer_view_->cursor().getFont();
 422         FontMetrics const & fm = theFontMetrics(font);
 423         int const asc = fm.maxAscent();
 424         int const des = fm.maxDescent();
 425         int h = asc + des;
 426         int x = 0;
 427         int y = 0;
 428         buffer_view_->cursor().getPos(x, y);
 429         y -= asc;
 430
 431         // if it doesn't touch the screen, don't try to show it
 432         if (y + h < 0 || y >= viewport()->height())
 433                 return;
 434
 435         cursor_visible_ = true;
 436         showCursor(x, y, h, shape);
 437 }
 438
 439
 440 void GuiWorkArea::hideCursor()
 441 {
 442         if (!cursor_visible_)
 443                 return;
 444
 445         cursor_visible_ = false;
 446         removeCursor();
 447 }
 448
 449
 450 void GuiWorkArea::toggleCursor()
 451 {
 452         if (cursor_visible_)
 453                 hideCursor();
 454         else
 455                 showCursor();
 456
 457         // Use this opportunity to deal with any child processes that
 458         // have finished but are waiting to communicate this fact
 459         // to the rest of LyX.
 460         ForkedCallsController::handleCompletedProcesses();
 461 }
 462
 463
 464 void GuiWorkArea::updateScrollbar()
 465 {
 466         verticalScrollBar()->setTracking(false);
 467
 468         ScrollbarParameters const & scroll_ = buffer_view_->scrollbarParameters();
 469
 470         // do what cursor movement does (some grey)
 471         int const h = scroll_.height + viewport()->height() / 4;
 472         int scroll_max_ = max(0, h - viewport()->height());
 473
 474         verticalScrollBar()->setRange(0, scroll_max_);
 475         verticalScrollBar()->setSliderPosition(scroll_.position);
 476         verticalScrollBar()->setSingleStep(scroll_.lineScrollHeight);
 477         verticalScrollBar()->setValue(scroll_.position);
 478
 479         verticalScrollBar()->setTracking(true);
 480 }
 481
 482
 483 void GuiWorkArea::adjustViewWithScrollBar(int action)
 484 {
 485         stopBlinkingCursor();
 486         if (action == QAbstractSlider::SliderPageStepAdd)
 487                 buffer_view_->scrollDown(viewport()->height());
 488         else if (action == QAbstractSlider::SliderPageStepSub)
 489                 buffer_view_->scrollUp(viewport()->height());
 490         else
 491                 buffer_view_->scrollDocView(verticalScrollBar()->sliderPosition());
 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     if (e->type() == QEvent::ToolTip) {
 506          QHelpEvent * helpEvent = static_cast<QHelpEvent *>(e);
 507                  if (!lyxrc.use_tooltip)
 508                          return QAbstractScrollArea::event(e);
 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      return QAbstractScrollArea::event(e);
 518 }
 519
 520
 521 void GuiWorkArea::contextMenuEvent(QContextMenuEvent * e)
 522 {
 523         QPoint pos = e->pos();
 524         docstring name = buffer_view_->contextMenu(pos.x(), pos.y());
 525         if (name.empty()) {
 526                 QAbstractScrollArea::contextMenuEvent(e);
 527                 return;
 528         }
 529         QMenu * menu = guiApp->menus().menu(toqstr(name));
 530         if (!menu) {
 531                 QAbstractScrollArea::contextMenuEvent(e);
 532                 return;
 533         }
 534         // Position the menu to the right.
 535         // FIXME: menu position should be different for RTL text.
 536         pos.rx() += menu->width();
 537         // FIXME: correct vertical position of the menu WRT screen espace.
 538         //pos.ry() += menu->height();
 539         menu->exec(pos);
 540         e->accept();
 541 }
 542
 543
 544 void GuiWorkArea::focusInEvent(QFocusEvent * /*event*/)
 545 {
 546         // Repaint the whole screen.
 547         // Note: this is different from redraw() as only the backing pixmap
 548         // will be redrawn, which is cheap.
 549         viewport()->repaint();
 550
 551         startBlinkingCursor();
 552 }
 553
 554
 555 void GuiWorkArea::focusOutEvent(QFocusEvent * /*event*/)
 556 {
 557         stopBlinkingCursor();
 558 }
 559
 560
 561 void GuiWorkArea::mousePressEvent(QMouseEvent * e)
 562 {
 563         if (dc_event_.active && dc_event_ == *e) {
 564                 dc_event_.active = false;
 565                 FuncRequest cmd(LFUN_MOUSE_TRIPLE, e->x(), e->y(),
 566                         q_button_state(e->button()));
 567                 dispatch(cmd);
 568                 return;
 569         }
 570
 571         inputContext()->reset();
 572
 573         FuncRequest const cmd(LFUN_MOUSE_PRESS, e->x(), e->y(),
 574                 q_button_state(e->button()));
 575         dispatch(cmd, q_key_state(e->modifiers()));
 576 }
 577
 578
 579 void GuiWorkArea::mouseReleaseEvent(QMouseEvent * e)
 580 {
 581         if (synthetic_mouse_event_.timeout.running())
 582                 synthetic_mouse_event_.timeout.stop();
 583
 584         FuncRequest const cmd(LFUN_MOUSE_RELEASE, e->x(), e->y(),
 585                               q_button_state(e->button()));
 586         dispatch(cmd);
 587 }
 588
 589
 590 void GuiWorkArea::mouseMoveEvent(QMouseEvent * e)
 591 {
 592         // we kill the triple click if we move
 593         doubleClickTimeout();
 594         FuncRequest cmd(LFUN_MOUSE_MOTION, e->x(), e->y(),
 595                               q_motion_state(e->buttons()));
 596
 597         // If we're above or below the work area...
 598         if (e->y() <= 20 || e->y() >= viewport()->height() - 20) {
 599                 // Make sure only a synthetic event can cause a page scroll,
 600                 // so they come at a steady rate:
 601                 if (e->y() <= 20)
 602                         // _Force_ a scroll up:
 603                         cmd.y = -40;
 604                 else
 605                         cmd.y = viewport()->height();
 606                 // Store the event, to be handled when the timeout expires.
 607                 synthetic_mouse_event_.cmd = cmd;
 608
 609                 if (synthetic_mouse_event_.timeout.running())
 610                         // Discard the event. Note that it _may_ be handled
 611                         // when the timeout expires if
 612                         // synthetic_mouse_event_.cmd has not been overwritten.
 613                         // Ie, when the timeout expires, we handle the
 614                         // most recent event but discard all others that
 615                         // occurred after the one used to start the timeout
 616                         // in the first place.
 617                         return;
 618                 else {
 619                         synthetic_mouse_event_.restart_timeout = true;
 620                         synthetic_mouse_event_.timeout.start();
 621                         // Fall through to handle this event...
 622                 }
 623
 624         } else if (synthetic_mouse_event_.timeout.running()) {
 625                 // Store the event, to be possibly handled when the timeout
 626                 // expires.
 627                 // Once the timeout has expired, normal control is returned
 628                 // to mouseMoveEvent (restart_timeout = false).
 629                 // This results in a much smoother 'feel' when moving the
 630                 // mouse back into the work area.
 631                 synthetic_mouse_event_.cmd = cmd;
 632                 synthetic_mouse_event_.restart_timeout = false;
 633                 return;
 634         }
 635
 636         // Has anything changed on-screen since the last QMouseEvent
 637         // was received?
 638         double const scrollbar_value = verticalScrollBar()->value();
 639         if (e->x() != synthetic_mouse_event_.x_old ||
 640             e->y() != synthetic_mouse_event_.y_old ||
 641             scrollbar_value != synthetic_mouse_event_.scrollbar_value_old) {
 642                 // Yes it has. Store the params used to check this.
 643                 synthetic_mouse_event_.x_old = e->x();
 644                 synthetic_mouse_event_.y_old = e->y();
 645                 synthetic_mouse_event_.scrollbar_value_old = scrollbar_value;
 646
 647                 // ... and dispatch the event to the LyX core.
 648                 dispatch(cmd);
 649         }
 650 }
 651
 652
 653 void GuiWorkArea::wheelEvent(QWheelEvent * e)
 654 {
 655         // Wheel rotation by one notch results in a delta() of 120 (see
 656         // documentation of QWheelEvent)
 657         int const lines = qApp->wheelScrollLines() * e->delta() / 120;
 658         verticalScrollBar()->setValue(verticalScrollBar()->value() -
 659                         lines *  verticalScrollBar()->singleStep());
 660         adjustViewWithScrollBar();
 661 }
 662
 663
 664 void GuiWorkArea::generateSyntheticMouseEvent()
 665 {
 666 // Set things off to generate the _next_ 'pseudo' event.
 667         if (synthetic_mouse_event_.restart_timeout)
 668                 synthetic_mouse_event_.timeout.start();
 669
 670         // Has anything changed on-screen since the last timeout signal
 671         // was received?
 672         double const scrollbar_value = verticalScrollBar()->value();
 673         if (scrollbar_value != synthetic_mouse_event_.scrollbar_value_old) {
 674                 // Yes it has. Store the params used to check this.
 675                 synthetic_mouse_event_.scrollbar_value_old = scrollbar_value;
 676
 677                 // ... and dispatch the event to the LyX core.
 678                 dispatch(synthetic_mouse_event_.cmd);
 679         }
 680 }
 681
 682
 683 void GuiWorkArea::keyPressEvent(QKeyEvent * ev)
 684 {
 685         // do nothing if there are other events
 686         // (the auto repeated events come too fast)
 687         // \todo FIXME: remove hard coded Qt keys, process the key binding
 688 #ifdef Q_WS_X11
 689         if (XEventsQueued(QX11Info::display(), 0) > 1 && ev->isAutoRepeat()
 690                         && (Qt::Key_PageDown || Qt::Key_PageUp)) {
 691                 LYXERR(Debug::KEY, "system is busy: scroll key event ignored");
 692                 ev->ignore();
 693                 return;
 694         }
 695 #endif
 696
 697         LYXERR(Debug::KEY, " count: " << ev->count()
 698                 << " text: " << fromqstr(ev->text())
 699                 << " isAutoRepeat: " << ev->isAutoRepeat() << " key: " << ev->key());
 700
 701         KeySymbol sym;
 702         setKeySymbol(&sym, ev);
 703         processKeySym(sym, q_key_state(ev->modifiers()));
 704 }
 705
 706
 707 void GuiWorkArea::doubleClickTimeout()
 708 {
 709         dc_event_.active = false;
 710 }
 711
 712
 713 void GuiWorkArea::mouseDoubleClickEvent(QMouseEvent * ev)
 714 {
 715         dc_event_ = DoubleClick(ev);
 716         QTimer::singleShot(QApplication::doubleClickInterval(), this,
 717                            SLOT(doubleClickTimeout()));
 718         FuncRequest cmd(LFUN_MOUSE_DOUBLE,
 719                         ev->x(), ev->y(),
 720                         q_button_state(ev->button()));
 721         dispatch(cmd);
 722 }
 723
 724
 725 void GuiWorkArea::resizeEvent(QResizeEvent * ev)
 726 {
 727         QAbstractScrollArea::resizeEvent(ev);
 728         need_resize_ = true;
 729 }
 730
 731
 732 void GuiWorkArea::update(int x, int y, int w, int h)
 733 {
 734         viewport()->repaint(x, y, w, h);
 735 }
 736
 737
 738 void GuiWorkArea::paintEvent(QPaintEvent * ev)
 739 {
 740         QRect const rc = ev->rect();
 741         // LYXERR(Debug::PAINTING, "paintEvent begin: x: " << rc.x()
 742         //      << " y: " << rc.y() << " w: " << rc.width() << " h: " << rc.height());
 743
 744         if (need_resize_) {
 745                 verticalScrollBar()->setPageStep(viewport()->height());
 746                 screen_ = QPixmap(viewport()->width(), viewport()->height());
 747                 resizeBufferView();
 748                 updateScreen();
 749                 hideCursor();
 750                 showCursor();
 751         }
 752
 753         QPainter pain(viewport());
 754         pain.drawPixmap(rc, screen_, rc);
 755         cursor_->draw(pain);
 756 }
 757
 758
 759 void GuiWorkArea::updateScreen()
 760 {
 761         GuiPainter pain(&screen_);
 762         buffer_view_->draw(pain);
 763 }
 764
 765
 766 void GuiWorkArea::showCursor(int x, int y, int h, CursorShape shape)
 767 {
 768         if (schedule_redraw_) {
 769                 buffer_view_->updateMetrics();
 770                 updateScreen();
 771                 viewport()->update(QRect(0, 0, viewport()->width(), viewport()->height()));
 772                 schedule_redraw_ = false;
 773                 // Show the cursor immediately after the update.
 774                 hideCursor();
 775                 toggleCursor();
 776                 return;
 777         }
 778
 779         cursor_->update(x, y, h, shape);
 780         cursor_->show();
 781         viewport()->update(cursor_->rect());
 782 }
 783
 784
 785 void GuiWorkArea::removeCursor()
 786 {
 787         cursor_->hide();
 788         //if (!qApp->focusWidget())
 789                 viewport()->update(cursor_->rect());
 790 }
 791
 792
 793 void GuiWorkArea::inputMethodEvent(QInputMethodEvent * e)
 794 {
 795         QString const & commit_string = e->commitString();
 796         docstring const & preedit_string
 797                 = qstring_to_ucs4(e->preeditString());
 798
 799         if (!commit_string.isEmpty()) {
 800
 801                 LYXERR(Debug::KEY, "preeditString: " << fromqstr(e->preeditString())
 802                         << " commitString: " << fromqstr(e->commitString()));
 803
 804                 int key = 0;
 805
 806                 // FIXME Iwami 04/01/07: we should take care also of UTF16 surrogates here.
 807                 for (int i = 0; i != commit_string.size(); ++i) {
 808                         QKeyEvent ev(QEvent::KeyPress, key, Qt::NoModifier, commit_string[i]);
 809                         keyPressEvent(&ev);
 810                 }
 811         }
 812
 813         // Hide the cursor during the kana-kanji transformation.
 814         if (preedit_string.empty())
 815                 startBlinkingCursor();
 816         else
 817                 stopBlinkingCursor();
 818
 819         // last_width : for checking if last preedit string was/wasn't empty.
 820         static bool last_width = false;
 821         if (!last_width && preedit_string.empty()) {
 822                 // if last_width is last length of preedit string.
 823                 e->accept();
 824                 return;
 825         }
 826
 827         GuiPainter pain(&screen_);
 828         buffer_view_->updateMetrics();
 829         buffer_view_->draw(pain);
 830         FontInfo font = buffer_view_->cursor().getFont().fontInfo();
 831         FontMetrics const & fm = theFontMetrics(font);
 832         int height = fm.maxHeight();
 833         int cur_x = cursor_->rect().left();
 834         int cur_y = cursor_->rect().bottom();
 835
 836         // redraw area of preedit string.
 837         update(0, cur_y - height, viewport()->width(),
 838                 (height + 1) * preedit_lines_);
 839
 840         if (preedit_string.empty()) {
 841                 last_width = false;
 842                 preedit_lines_ = 1;
 843                 e->accept();
 844                 return;
 845         }
 846         last_width = true;
 847
 848         // att : stores an IM attribute.
 849         QList<QInputMethodEvent::Attribute> const & att = e->attributes();
 850
 851         // get attributes of input method cursor.
 852         // cursor_pos : cursor position in preedit string.
 853         size_t cursor_pos = 0;
 854         bool cursor_is_visible = false;
 855         for (int i = 0; i != att.size(); ++i) {
 856                 if (att.at(i).type == QInputMethodEvent::Cursor) {
 857                         cursor_pos = att.at(i).start;
 858                         cursor_is_visible = att.at(i).length != 0;
 859                         break;
 860                 }
 861         }
 862
 863         size_t preedit_length = preedit_string.length();
 864
 865         // get position of selection in input method.
 866         // FIXME: isn't there a way to do this simplier?
 867         // rStart : cursor position in selected string in IM.
 868         size_t rStart = 0;
 869         // rLength : selected string length in IM.
 870         size_t rLength = 0;
 871         if (cursor_pos < preedit_length) {
 872                 for (int i = 0; i != att.size(); ++i) {
 873                         if (att.at(i).type == QInputMethodEvent::TextFormat) {
 874                                 if (att.at(i).start <= int(cursor_pos)
 875                                         && int(cursor_pos) < att.at(i).start + att.at(i).length) {
 876                                                 rStart = att.at(i).start;
 877                                                 rLength = att.at(i).length;
 878                                                 if (!cursor_is_visible)
 879                                                         cursor_pos += rLength;
 880                                                 break;
 881                                 }
 882                         }
 883                 }
 884         }
 885         else {
 886                 rStart = cursor_pos;
 887                 rLength = 0;
 888         }
 889
 890         int const right_margin = rightMargin();
 891         Painter::preedit_style ps;
 892         // Most often there would be only one line:
 893         preedit_lines_ = 1;
 894         for (size_t pos = 0; pos != preedit_length; ++pos) {
 895                 char_type const typed_char = preedit_string[pos];
 896                 // reset preedit string style
 897                 ps = Painter::preedit_default;
 898
 899                 // if we reached the right extremity of the screen, go to next line.
 900                 if (cur_x + fm.width(typed_char) > viewport()->width() - right_margin) {
 901                         cur_x = right_margin;
 902                         cur_y += height + 1;
 903                         ++preedit_lines_;
 904                 }
 905                 // preedit strings are displayed with dashed underline
 906                 // and partial strings are displayed white on black indicating
 907                 // that we are in selecting mode in the input method.
 908                 // FIXME: rLength == preedit_length is not a changing condition
 909                 // FIXME: should be put out of the loop.
 910                 if (pos >= rStart
 911                         && pos < rStart + rLength
 912                         && !(cursor_pos < rLength && rLength == preedit_length))
 913                         ps = Painter::preedit_selecting;
 914
 915                 if (pos == cursor_pos
 916                         && (cursor_pos < rLength && rLength == preedit_length))
 917                         ps = Painter::preedit_cursor;
 918
 919                 // draw one character and update cur_x.
 920                 cur_x += pain.preeditText(cur_x, cur_y, typed_char, font, ps);
 921         }
 922
 923         // update the preedit string screen area.
 924         update(0, cur_y - preedit_lines_*height, viewport()->width(),
 925                 (height + 1) * preedit_lines_);
 926
 927         // Don't forget to accept the event!
 928         e->accept();
 929 }
 930
 931
 932 QVariant GuiWorkArea::inputMethodQuery(Qt::InputMethodQuery query) const
 933 {
 934         QRect cur_r(0,0,0,0);
 935         switch (query) {
 936                 // this is the CJK-specific composition window position.
 937                 case Qt::ImMicroFocus:
 938                         cur_r = cursor_->rect();
 939                         if (preedit_lines_ != 1)
 940                                 cur_r.moveLeft(10);
 941                         cur_r.moveBottom(cur_r.bottom() + cur_r.height() * preedit_lines_);
 942                         // return lower right of cursor in LyX.
 943                         return cur_r;
 944                 default:
 945                         return QWidget::inputMethodQuery(query);
 946         }
 947 }
 948
 949
 950 void GuiWorkArea::updateWindowTitle()
 951 {
 952         docstring maximize_title;
 953         docstring minimize_title;
 954
 955         Buffer & buf = buffer_view_->buffer();
 956         FileName const fileName = buf.fileName();
 957         if (!fileName.empty()) {
 958                 maximize_title = fileName.displayName(30);
 959                 minimize_title = from_utf8(fileName.onlyFileName());
 960                 if (!buf.isClean()) {
 961                         maximize_title += _(" (changed)");
 962                         minimize_title += char_type('*');
 963                 }
 964                 if (buf.isReadonly())
 965                         maximize_title += _(" (read only)");
 966         }
 967
 968         QString title = windowTitle();
 969         QString new_title = toqstr(maximize_title);
 970         if (title == new_title)
 971                 return;
 972
 973         QWidget::setWindowTitle(new_title);
 974         QWidget::setWindowIconText(toqstr(minimize_title));
 975         titleChanged(this);
 976 }
 977
 978
 979 void GuiWorkArea::setReadOnly(bool)
 980 {
 981         updateWindowTitle();
 982         if (this == lyx_view_->currentWorkArea())
 983                 lyx_view_->updateBufferDependent(false);
 984 }
 985
 986
 987 ////////////////////////////////////////////////////////////////////
 988 //
 989 // TabWorkArea
 990 //
 991 ////////////////////////////////////////////////////////////////////
 992
 993 TabWorkArea::TabWorkArea(QWidget * parent) : QTabWidget(parent)
 994 {
 995         QPalette pal = palette();
 996         pal.setColor(QPalette::Active, QPalette::Button,
 997                 pal.color(QPalette::Active, QPalette::Window));
 998         pal.setColor(QPalette::Disabled, QPalette::Button,
 999                 pal.color(QPalette::Disabled, QPalette::Window));
1000         pal.setColor(QPalette::Inactive, QPalette::Button,
1001                 pal.color(QPalette::Inactive, QPalette::Window));
1002
1003         QToolButton * closeTabButton = new QToolButton(this);
1004     closeTabButton->setPalette(pal);
1005         closeTabButton->setIcon(QIcon(":/images/closetab.png"));
1006         closeTabButton->setText("Close");
1007         closeTabButton->setAutoRaise(true);
1008         closeTabButton->setCursor(Qt::ArrowCursor);
1009         closeTabButton->setToolTip(tr("Close tab"));
1010         closeTabButton->setEnabled(true);
1011
1012         QObject::connect(this, SIGNAL(currentChanged(int)),
1013                 this, SLOT(on_currentTabChanged(int)));
1014         QObject::connect(closeTabButton, SIGNAL(clicked()),
1015                 this, SLOT(closeCurrentTab()));
1016
1017         setCornerWidget(closeTabButton);
1018         setUsesScrollButtons(true);
1019 }
1020
1021
1022 void TabWorkArea::showBar(bool show)
1023 {
1024         tabBar()->setEnabled(show);
1025         tabBar()->setVisible(show);
1026 }
1027
1028
1029 GuiWorkArea * TabWorkArea::currentWorkArea()
1030 {
1031         if (count() == 0)
1032                 return 0;
1033
1034         GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(currentWidget());
1035         BOOST_ASSERT(wa);
1036         return wa;
1037 }
1038
1039
1040 GuiWorkArea * TabWorkArea::workArea(Buffer & buffer)
1041 {
1042         for (int i = 0; i != count(); ++i) {
1043                 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i));
1044                 BOOST_ASSERT(wa);
1045                 if (&wa->bufferView().buffer() == &buffer)
1046                         return wa;
1047         }
1048         return 0;
1049 }
1050
1051
1052 void TabWorkArea::closeAll()
1053 {
1054         while (count()) {
1055                 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(0));
1056                 BOOST_ASSERT(wa);
1057                 removeTab(0);
1058                 delete wa;
1059         }
1060 }
1061
1062
1063 bool TabWorkArea::setCurrentWorkArea(GuiWorkArea * work_area)
1064 {
1065         BOOST_ASSERT(work_area);
1066         int index = indexOf(work_area);
1067         if (index == -1)
1068                 return false;
1069
1070         if (index == currentIndex())
1071                 // Make sure the work area is up to date.
1072                 on_currentTabChanged(index);
1073         else
1074                 // Switch to the work area.
1075                 setCurrentIndex(index);
1076         work_area->setFocus();
1077
1078         return true;
1079 }
1080
1081
1082 GuiWorkArea * TabWorkArea::addWorkArea(Buffer & buffer, GuiView & view)
1083 {
1084         GuiWorkArea * wa = new GuiWorkArea(buffer, view);
1085         wa->setUpdatesEnabled(false);
1086         // Hide tabbar if there's no tab (avoid a resize and a flashing tabbar
1087         // when hiding it again below).
1088         showBar(count() > 0);
1089         addTab(wa, wa->windowTitle());
1090         QObject::connect(wa, SIGNAL(titleChanged(GuiWorkArea *)),
1091                 this, SLOT(updateTabText(GuiWorkArea *)));
1092         // Hide tabbar if there's only one tab.
1093         showBar(count() > 1);
1094         return wa;
1095 }
1096
1097
1098 bool TabWorkArea::removeWorkArea(GuiWorkArea * work_area)
1099 {
1100         BOOST_ASSERT(work_area);
1101         int index = indexOf(work_area);
1102         if (index == -1)
1103                 return false;
1104
1105         work_area->setUpdatesEnabled(false);
1106         removeTab(index);
1107         delete work_area;
1108
1109         if (count()) {
1110                 // make sure the next work area is enabled.
1111                 currentWidget()->setUpdatesEnabled(true);
1112                 // Hide tabbar if there's only one tab.
1113                 showBar(count() > 1);
1114         }
1115         return true;
1116 }
1117
1118
1119 void TabWorkArea::on_currentTabChanged(int i)
1120 {
1121         GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i));
1122         BOOST_ASSERT(wa);
1123         BufferView & bv = wa->bufferView();
1124         bv.cursor().fixIfBroken();
1125         bv.updateMetrics();
1126         wa->setUpdatesEnabled(true);
1127         wa->redraw();
1128         wa->setFocus();
1129         ///
1130         currentWorkAreaChanged(wa);
1131
1132         LYXERR(Debug::GUI, "currentTabChanged " << i
1133                 << "File" << bv.buffer().absFileName());
1134 }
1135
1136
1137 void TabWorkArea::closeCurrentTab()
1138 {
1139         lyx::dispatch(FuncRequest(LFUN_BUFFER_CLOSE));
1140 }
1141
1142
1143 void TabWorkArea::updateTabText(GuiWorkArea * wa)
1144 {
1145         int const i = indexOf(wa);
1146         if (i < 0)
1147                 return;
1148         setTabText(i, wa->windowTitle());
1149 }
1150
1151 } // namespace frontend
1152 } // namespace lyx
1153
1154 #include "GuiWorkArea_moc.cpp"