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