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 <QLayout>
  51 #include <QMainWindow>
  52 #include <QPainter>
  53 #include <QPalette>
  54 #include <QScrollBar>
  55 #include <QTabBar>
  56 #include <QTimer>
  57 #include <QToolButton>
  58 #include <QToolTip>
  59
  60 #include <boost/bind.hpp>
  61
  62 #ifdef Q_WS_X11
  63 #include <QX11Info>
  64 extern "C" int XEventsQueued(Display *display, int mode);
  65 #endif
  66
  67 #ifdef Q_WS_WIN
  68 int const CursorWidth = 2;
  69 #else
  70 int const CursorWidth = 1;
  71 #endif
  72
  73 #undef KeyPress
  74 #undef NoModifier
  75
  76 using namespace std;
  77 using namespace lyx::support;
  78
  79 namespace lyx {
  80
  81
  82 /// return the LyX mouse button state from Qt's
  83 static mouse_button::state q_button_state(Qt::MouseButton button)
  84 {
  85         mouse_button::state b = mouse_button::none;
  86         switch (button) {
  87                 case Qt::LeftButton:
  88                         b = mouse_button::button1;
  89                         break;
  90                 case Qt::MidButton:
  91                         b = mouse_button::button2;
  92                         break;
  93                 case Qt::RightButton:
  94                         b = mouse_button::button3;
  95                         break;
  96                 default:
  97                         break;
  98         }
  99         return b;
 100 }
 101
 102
 103 /// return the LyX mouse button state from Qt's
 104 mouse_button::state q_motion_state(Qt::MouseButtons state)
 105 {
 106         mouse_button::state b = mouse_button::none;
 107         if (state & Qt::LeftButton)
 108                 b |= mouse_button::button1;
 109         if (state & Qt::MidButton)
 110                 b |= mouse_button::button2;
 111         if (state & Qt::RightButton)
 112                 b |= mouse_button::button3;
 113         return b;
 114 }
 115
 116
 117 namespace frontend {
 118
 119 class CursorWidget {
 120 public:
 121         CursorWidget() {}
 122
 123         void draw(QPainter & painter)
 124         {
 125                 if (show_ && rect_.isValid()) {
 126                         switch (shape_) {
 127                         case L_SHAPE:
 128                                 painter.fillRect(rect_.x(), rect_.y(), CursorWidth, rect_.height(), color_);
 129                                 painter.setPen(color_);
 130                                 painter.drawLine(rect_.bottomLeft().x() + CursorWidth, rect_.bottomLeft().y(),
 131                                                                                                  rect_.bottomRight().x(), rect_.bottomLeft().y());
 132                                 break;
 133
 134                         case REVERSED_L_SHAPE:
 135                                 painter.fillRect(rect_.x() + rect_.height() / 3, rect_.y(), CursorWidth, rect_.height(), color_);
 136                                 painter.setPen(color_);
 137                                 painter.drawLine(rect_.bottomRight().x() - CursorWidth, rect_.bottomLeft().y(),
 138                                                                                                          rect_.bottomLeft().x(), rect_.bottomLeft().y());
 139                                 break;
 140
 141                         default:
 142                                 painter.fillRect(rect_, color_);
 143                                 break;
 144                         }
 145                 }
 146         }
 147
 148         void update(int x, int y, int h, CursorShape shape)
 149         {
 150                 color_ = guiApp->colorCache().get(Color_cursor);
 151                 shape_ = shape;
 152                 switch (shape) {
 153                 case L_SHAPE:
 154                         rect_ = QRect(x, y, CursorWidth + h / 3, h);
 155                         break;
 156                 case REVERSED_L_SHAPE:
 157                         rect_ = QRect(x - h / 3, y, CursorWidth + h / 3, h);
 158                         break;
 159                 default:
 160                         rect_ = QRect(x, y, CursorWidth, h);
 161                         break;
 162                 }
 163         }
 164
 165         void show(bool set_show = true) { show_ = set_show; }
 166         void hide() { show_ = false; }
 167
 168         QRect const & rect() { return rect_; }
 169
 170 private:
 171         ///
 172         CursorShape shape_;
 173         ///
 174         bool show_;
 175         ///
 176         QColor color_;
 177         ///
 178         QRect rect_;
 179 };
 180
 181
 182 // This is a 'heartbeat' generating synthetic mouse move events when the
 183 // cursor is at the top or bottom edge of the viewport. One scroll per 0.2 s
 184 SyntheticMouseEvent::SyntheticMouseEvent()
 185         : timeout(200), restart_timeout(true),
 186           x_old(-1), y_old(-1), scrollbar_value_old(-1.0)
 187 {}
 188
 189
 190
 191 GuiWorkArea::GuiWorkArea(Buffer & buffer, GuiView & lv)
 192         : buffer_view_(new BufferView(buffer)), lyx_view_(&lv),
 193           cursor_visible_(false),
 194     need_resize_(false), schedule_redraw_(false),
 195                 preedit_lines_(1)
 196 {
 197         buffer.workAreaManager().add(this);
 198         // Setup the signals
 199         connect(&cursor_timeout_, SIGNAL(timeout()),
 200                 this, SLOT(toggleCursor()));
 201
 202         int const time = QApplication::cursorFlashTime() / 2;
 203         if (time > 0) {
 204                 cursor_timeout_.setInterval(time);
 205                 cursor_timeout_.start();
 206         } else
 207                 // let's initialize this just to be safe
 208                 cursor_timeout_.setInterval(500);
 209
 210         screen_ = QPixmap(viewport()->width(), viewport()->height());
 211         cursor_ = new frontend::CursorWidget();
 212         cursor_->hide();
 213
 214         setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
 215         setAcceptDrops(true);
 216         setMouseTracking(true);
 217         setMinimumSize(100, 70);
 218         updateWindowTitle();
 219
 220         viewport()->setAutoFillBackground(false);
 221         // We don't need double-buffering nor SystemBackground on
 222         // the viewport because we have our own backing pixmap.
 223         viewport()->setAttribute(Qt::WA_NoSystemBackground);
 224
 225         setFocusPolicy(Qt::WheelFocus);
 226
 227         viewport()->setCursor(Qt::IBeamCursor);
 228
 229         synthetic_mouse_event_.timeout.timeout.connect(
 230                 boost::bind(&GuiWorkArea::generateSyntheticMouseEvent,
 231                                         this));
 232
 233         // Initialize the vertical Scroll Bar
 234         QObject::connect(verticalScrollBar(), SIGNAL(valueChanged(int)),
 235                 this, SLOT(scrollTo(int)));
 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         //we're not supposed to cache this value.
 284         int const time = QApplication::cursorFlashTime() / 2;
 285         if (time <= 0)
 286                 return;
 287         cursor_timeout_.setInterval(time);
 288         cursor_timeout_.start();
 289 }
 290
 291
 292 void GuiWorkArea::redraw()
 293 {
 294         if (!isVisible())
 295                 // No need to redraw in this case.
 296                 return;
 297
 298         // No need to do anything if this is the current view. The BufferView
 299         // metrics are already up to date.
 300         if (lyx_view_ != guiApp->currentView()) {
 301                 // FIXME: it would be nice to optimize for the off-screen case.
 302                 buffer_view_->updateMetrics();
 303                 buffer_view_->cursor().fixIfBroken();
 304         }
 305
 306         // update cursor position, because otherwise it has to wait until
 307         // the blinking interval is over
 308         if (cursor_visible_) {
 309                 hideCursor();
 310                 showCursor();
 311         }
 312
 313         LYXERR(Debug::WORKAREA, "WorkArea::redraw screen");
 314         updateScreen();
 315         update(0, 0, viewport()->width(), viewport()->height());
 316
 317         /// \warning: scrollbar updating *must* be done after the BufferView is drawn
 318         /// because \c BufferView::updateScrollbar() is called in \c BufferView::draw().
 319         updateScrollbar();
 320         lyx_view_->updateStatusBar();
 321
 322         if (lyxerr.debugging(Debug::WORKAREA))
 323                 buffer_view_->coordCache().dump();
 324 }
 325
 326
 327 void GuiWorkArea::processKeySym(KeySymbol const & key, KeyModifier mod)
 328 {
 329         // In order to avoid bad surprise in the middle of an operation,
 330         // we better stop the blinking cursor...
 331         // the cursor gets restarted in GuiView::restartCursor()
 332         stopBlinkingCursor();
 333
 334         theLyXFunc().setLyXView(lyx_view_);
 335         theLyXFunc().processKeySym(key, mod);
 336
 337 }
 338
 339
 340 void GuiWorkArea::dispatch(FuncRequest const & cmd0, KeyModifier mod)
 341 {
 342         // Handle drag&drop
 343         if (cmd0.action == LFUN_FILE_OPEN) {
 344                 lyx_view_->dispatch(cmd0);
 345                 return;
 346         }
 347
 348         theLyXFunc().setLyXView(lyx_view_);
 349
 350         FuncRequest cmd;
 351
 352         if (cmd0.action == LFUN_MOUSE_PRESS) {
 353                 if (mod == ShiftModifier)
 354                         cmd = FuncRequest(cmd0, "region-select");
 355                 else if (mod == ControlModifier)
 356                         cmd = FuncRequest(cmd0, "paragraph-select");
 357                 else
 358                         cmd = cmd0;
 359         }
 360         else
 361                 cmd = cmd0;
 362
 363         bool const notJustMovingTheMouse =
 364                 cmd.action != LFUN_MOUSE_MOTION || cmd.button() != mouse_button::none;
 365
 366         // In order to avoid bad surprise in the middle of an operation, we better stop
 367         // the blinking cursor.
 368         if (notJustMovingTheMouse)
 369                 stopBlinkingCursor();
 370
 371         buffer_view_->mouseEventDispatch(cmd);
 372
 373         // Skip these when selecting
 374         if (cmd.action != LFUN_MOUSE_MOTION) {
 375                 lyx_view_->updateLayoutList();
 376                 lyx_view_->updateToolbars();
 377         }
 378
 379         // GUI tweaks except with mouse motion with no button pressed.
 380         if (notJustMovingTheMouse) {
 381                 // Slight hack: this is only called currently when we
 382                 // clicked somewhere, so we force through the display
 383                 // of the new status here.
 384                 lyx_view_->clearMessage();
 385
 386                 // Show the cursor immediately after any operation
 387                 startBlinkingCursor();
 388         }
 389 }
 390
 391
 392 void GuiWorkArea::resizeBufferView()
 393 {
 394         // WARNING: Please don't put any code that will trigger a repaint here!
 395         // We are already inside a paint event.
 396         lyx_view_->setBusy(true);
 397         buffer_view_->resize(viewport()->width(), viewport()->height());
 398         lyx_view_->updateLayoutList();
 399         lyx_view_->setBusy(false);
 400         need_resize_ = false;
 401 }
 402
 403
 404 void GuiWorkArea::showCursor()
 405 {
 406         if (cursor_visible_)
 407                 return;
 408
 409         CursorShape shape = BAR_SHAPE;
 410
 411         Font const & realfont = buffer_view_->cursor().real_current_font;
 412         BufferParams const & bp = buffer_view_->buffer().params();
 413         bool const samelang = realfont.language() == bp.language;
 414         bool const isrtl = realfont.isVisibleRightToLeft();
 415
 416         if (!samelang || isrtl != bp.language->rightToLeft()) {
 417                 shape = L_SHAPE;
 418                 if (isrtl)
 419                         shape = REVERSED_L_SHAPE;
 420         }
 421
 422         // The ERT language hack needs fixing up
 423         if (realfont.language() == latex_language)
 424                 shape = BAR_SHAPE;
 425
 426         Font const font = buffer_view_->cursor().getFont();
 427         FontMetrics const & fm = theFontMetrics(font);
 428         int const asc = fm.maxAscent();
 429         int const des = fm.maxDescent();
 430         int h = asc + des;
 431         int x = 0;
 432         int y = 0;
 433         buffer_view_->cursor().getPos(x, y);
 434         y -= asc;
 435
 436         // if it doesn't touch the screen, don't try to show it
 437         if (y + h < 0 || y >= viewport()->height())
 438                 return;
 439
 440         cursor_visible_ = true;
 441         showCursor(x, y, h, shape);
 442 }
 443
 444
 445 void GuiWorkArea::hideCursor()
 446 {
 447         if (!cursor_visible_)
 448                 return;
 449
 450         cursor_visible_ = false;
 451         removeCursor();
 452 }
 453
 454
 455 void GuiWorkArea::toggleCursor()
 456 {
 457         if (cursor_visible_)
 458                 hideCursor();
 459         else
 460                 showCursor();
 461 }
 462
 463
 464 void GuiWorkArea::updateScrollbar()
 465 {
 466         ScrollbarParameters const & scroll_ = buffer_view_->scrollbarParameters();
 467
 468         verticalScrollBar()->setRange(scroll_.min, scroll_.max);
 469         verticalScrollBar()->setPageStep(scroll_.page_step);
 470         verticalScrollBar()->setSingleStep(scroll_.single_step);
 471         // Block the scrollbar signal to prevent recursive signal/slot calling.
 472         verticalScrollBar()->blockSignals(true);
 473         verticalScrollBar()->setValue(scroll_.position);
 474         verticalScrollBar()->setSliderPosition(scroll_.position);
 475         verticalScrollBar()->blockSignals(false);
 476 }
 477
 478
 479 void GuiWorkArea::scrollTo(int value)
 480 {
 481         stopBlinkingCursor();
 482         buffer_view_->scrollDocView(value);
 483
 484         if (lyxrc.cursor_follows_scrollbar) {
 485                 buffer_view_->setCursorFromScrollbar();
 486                 lyx_view_->updateLayoutList();
 487         }
 488         // Show the cursor immediately after any operation.
 489         startBlinkingCursor();
 490         QApplication::syncX();
 491 }
 492
 493
 494 bool GuiWorkArea::event(QEvent * e)
 495 {
 496         switch (e->type()) {
 497         case QEvent::ToolTip: {
 498                 QHelpEvent * helpEvent = static_cast<QHelpEvent *>(e);
 499                 if (lyxrc.use_tooltip) {
 500                         QPoint pos = helpEvent->pos();
 501                         if (pos.x() < viewport()->width()) {
 502                                 QString s = toqstr(buffer_view_->toolTip(pos.x(), pos.y()));
 503                                 QToolTip::showText(helpEvent->globalPos(), s);
 504                         }
 505                         else
 506                                 QToolTip::hideText();
 507                 }
 508                 // Don't forget to accept the event!
 509                 e->accept();
 510                 return true;
 511         }
 512
 513         case QEvent::ShortcutOverride: {
 514                 // We catch this event in order to catch the Tab or Shift+Tab key press
 515                 // which are otherwise reserved to focus switching between controls
 516                 // within a dialog.
 517                 QKeyEvent * ke = static_cast<QKeyEvent*>(e);
 518                 if ((ke->key() != Qt::Key_Tab && ke->key() != Qt::Key_Backtab)
 519                         || ke->modifiers() & Qt::ControlModifier)
 520                         return QAbstractScrollArea::event(e);
 521                 keyPressEvent(ke);
 522                 return true;
 523         }
 524
 525         default:
 526                 return QAbstractScrollArea::event(e);
 527         }
 528         return false;
 529 }
 530
 531
 532 void GuiWorkArea::contextMenuEvent(QContextMenuEvent * e)
 533 {
 534         QPoint pos = e->pos();
 535         docstring name = buffer_view_->contextMenu(pos.x(), pos.y());
 536         if (name.empty()) {
 537                 QAbstractScrollArea::contextMenuEvent(e);
 538                 return;
 539         }
 540         QMenu * menu = guiApp->menus().menu(toqstr(name));
 541         if (!menu) {
 542                 QAbstractScrollArea::contextMenuEvent(e);
 543                 return;
 544         }
 545         // Position the menu to the right.
 546         // FIXME: menu position should be different for RTL text.
 547         pos.rx() += menu->width();
 548         // FIXME: correct vertical position of the menu WRT screen espace.
 549         //pos.ry() += menu->height();
 550         menu->exec(pos);
 551         e->accept();
 552 }
 553
 554
 555 void GuiWorkArea::focusInEvent(QFocusEvent * /*event*/)
 556 {
 557         // Repaint the whole screen.
 558         // Note: this is different from redraw() as only the backing pixmap
 559         // will be redrawn, which is cheap.
 560         viewport()->repaint();
 561
 562         startBlinkingCursor();
 563 }
 564
 565
 566 void GuiWorkArea::focusOutEvent(QFocusEvent * /*event*/)
 567 {
 568         stopBlinkingCursor();
 569 }
 570
 571
 572 void GuiWorkArea::mousePressEvent(QMouseEvent * e)
 573 {
 574         if (dc_event_.active && dc_event_ == *e) {
 575                 dc_event_.active = false;
 576                 FuncRequest cmd(LFUN_MOUSE_TRIPLE, e->x(), e->y(),
 577                         q_button_state(e->button()));
 578                 dispatch(cmd);
 579                 return;
 580         }
 581
 582         inputContext()->reset();
 583
 584         FuncRequest const cmd(LFUN_MOUSE_PRESS, e->x(), e->y(),
 585                 q_button_state(e->button()));
 586         dispatch(cmd, q_key_state(e->modifiers()));
 587 }
 588
 589
 590 void GuiWorkArea::mouseReleaseEvent(QMouseEvent * e)
 591 {
 592         if (synthetic_mouse_event_.timeout.running())
 593                 synthetic_mouse_event_.timeout.stop();
 594
 595         FuncRequest const cmd(LFUN_MOUSE_RELEASE, e->x(), e->y(),
 596                               q_button_state(e->button()));
 597         dispatch(cmd);
 598 }
 599
 600
 601 void GuiWorkArea::mouseMoveEvent(QMouseEvent * e)
 602 {
 603         // we kill the triple click if we move
 604         doubleClickTimeout();
 605         FuncRequest cmd(LFUN_MOUSE_MOTION, e->x(), e->y(),
 606                               q_motion_state(e->buttons()));
 607
 608         // If we're above or below the work area...
 609         if (e->y() <= 20 || e->y() >= viewport()->height() - 20) {
 610                 // Make sure only a synthetic event can cause a page scroll,
 611                 // so they come at a steady rate:
 612                 if (e->y() <= 20)
 613                         // _Force_ a scroll up:
 614                         cmd.y = -40;
 615                 else
 616                         cmd.y = viewport()->height();
 617                 // Store the event, to be handled when the timeout expires.
 618                 synthetic_mouse_event_.cmd = cmd;
 619
 620                 if (synthetic_mouse_event_.timeout.running())
 621                         // Discard the event. Note that it _may_ be handled
 622                         // when the timeout expires if
 623                         // synthetic_mouse_event_.cmd has not been overwritten.
 624                         // Ie, when the timeout expires, we handle the
 625                         // most recent event but discard all others that
 626                         // occurred after the one used to start the timeout
 627                         // in the first place.
 628                         return;
 629                 else {
 630                         synthetic_mouse_event_.restart_timeout = true;
 631                         synthetic_mouse_event_.timeout.start();
 632                         // Fall through to handle this event...
 633                 }
 634
 635         } else if (synthetic_mouse_event_.timeout.running()) {
 636                 // Store the event, to be possibly handled when the timeout
 637                 // expires.
 638                 // Once the timeout has expired, normal control is returned
 639                 // to mouseMoveEvent (restart_timeout = false).
 640                 // This results in a much smoother 'feel' when moving the
 641                 // mouse back into the work area.
 642                 synthetic_mouse_event_.cmd = cmd;
 643                 synthetic_mouse_event_.restart_timeout = false;
 644                 return;
 645         }
 646
 647         // Has anything changed on-screen since the last QMouseEvent
 648         // was received?
 649         double const scrollbar_value = verticalScrollBar()->value();
 650         if (e->x() != synthetic_mouse_event_.x_old ||
 651             e->y() != synthetic_mouse_event_.y_old ||
 652             scrollbar_value != synthetic_mouse_event_.scrollbar_value_old) {
 653                 // Yes it has. Store the params used to check this.
 654                 synthetic_mouse_event_.x_old = e->x();
 655                 synthetic_mouse_event_.y_old = e->y();
 656                 synthetic_mouse_event_.scrollbar_value_old = scrollbar_value;
 657
 658                 // ... and dispatch the event to the LyX core.
 659                 dispatch(cmd);
 660         }
 661 }
 662
 663
 664 void GuiWorkArea::wheelEvent(QWheelEvent * e)
 665 {
 666         // Wheel rotation by one notch results in a delta() of 120 (see
 667         // documentation of QWheelEvent)
 668         double const lines = qApp->wheelScrollLines()
 669                 * lyxrc.mouse_wheel_speed
 670                 * e->delta() / 120.0;
 671         LYXERR(Debug::SCROLLING, "wheelScrollLines = " << qApp->wheelScrollLines()
 672                 << " delta = " << e->delta()
 673                 << " lines = " << lines);
 674         verticalScrollBar()->setValue(verticalScrollBar()->value() -
 675                 int(lines *  verticalScrollBar()->singleStep()));
 676 }
 677
 678
 679 void GuiWorkArea::generateSyntheticMouseEvent()
 680 {
 681         // Set things off to generate the _next_ 'pseudo' event.
 682         if (synthetic_mouse_event_.restart_timeout)
 683                 synthetic_mouse_event_.timeout.start();
 684
 685         // Has anything changed on-screen since the last timeout signal
 686         // was received?
 687         double const scrollbar_value = verticalScrollBar()->value();
 688         if (scrollbar_value != synthetic_mouse_event_.scrollbar_value_old) {
 689                 // Yes it has. Store the params used to check this.
 690                 synthetic_mouse_event_.scrollbar_value_old = scrollbar_value;
 691
 692                 // ... and dispatch the event to the LyX core.
 693                 dispatch(synthetic_mouse_event_.cmd);
 694         }
 695 }
 696
 697
 698 void GuiWorkArea::keyPressEvent(QKeyEvent * ev)
 699 {
 700         // do nothing if there are other events
 701         // (the auto repeated events come too fast)
 702         // \todo FIXME: remove hard coded Qt keys, process the key binding
 703 #ifdef Q_WS_X11
 704         if (XEventsQueued(QX11Info::display(), 0) > 1 && ev->isAutoRepeat()
 705                         && (Qt::Key_PageDown || Qt::Key_PageUp)) {
 706                 LYXERR(Debug::KEY, "system is busy: scroll key event ignored");
 707                 ev->ignore();
 708                 return;
 709         }
 710 #endif
 711
 712         LYXERR(Debug::KEY, " count: " << ev->count()
 713                 << " text: " << fromqstr(ev->text())
 714                 << " isAutoRepeat: " << ev->isAutoRepeat() << " key: " << ev->key());
 715
 716         KeySymbol sym;
 717         setKeySymbol(&sym, ev);
 718         processKeySym(sym, q_key_state(ev->modifiers()));
 719         ev->accept();
 720 }
 721
 722
 723 void GuiWorkArea::doubleClickTimeout()
 724 {
 725         dc_event_.active = false;
 726 }
 727
 728
 729 void GuiWorkArea::mouseDoubleClickEvent(QMouseEvent * ev)
 730 {
 731         dc_event_ = DoubleClick(ev);
 732         QTimer::singleShot(QApplication::doubleClickInterval(), this,
 733                            SLOT(doubleClickTimeout()));
 734         FuncRequest cmd(LFUN_MOUSE_DOUBLE,
 735                         ev->x(), ev->y(),
 736                         q_button_state(ev->button()));
 737         dispatch(cmd);
 738 }
 739
 740
 741 void GuiWorkArea::resizeEvent(QResizeEvent * ev)
 742 {
 743         QAbstractScrollArea::resizeEvent(ev);
 744         need_resize_ = true;
 745 }
 746
 747
 748 void GuiWorkArea::update(int x, int y, int w, int h)
 749 {
 750         viewport()->repaint(x, y, w, h);
 751 }
 752
 753
 754 void GuiWorkArea::paintEvent(QPaintEvent * ev)
 755 {
 756         QRect const rc = ev->rect();
 757         // LYXERR(Debug::PAINTING, "paintEvent begin: x: " << rc.x()
 758         //      << " y: " << rc.y() << " w: " << rc.width() << " h: " << rc.height());
 759
 760         if (need_resize_) {
 761                 screen_ = QPixmap(viewport()->width(), viewport()->height());
 762                 resizeBufferView();
 763
 764                 // Update scrollbars which might have changed due different
 765                 // BufferView dimension. This is especially important when the
 766                 // BufferView goes from zero-size to the real-size for the first time,
 767                 // as the scrollbar paramters are then set for the first time.
 768                 updateScrollbar();
 769                 BOOST_ASSERT(need_resize_ == false);
 770
 771                 updateScreen();
 772                 hideCursor();
 773                 showCursor();
 774         }
 775
 776         QPainter pain(viewport());
 777         pain.drawPixmap(rc, screen_, rc);
 778         cursor_->draw(pain);
 779 }
 780
 781
 782 void GuiWorkArea::updateScreen()
 783 {
 784         GuiPainter pain(&screen_);
 785         buffer_view_->draw(pain);
 786 }
 787
 788
 789 void GuiWorkArea::showCursor(int x, int y, int h, CursorShape shape)
 790 {
 791         if (schedule_redraw_) {
 792                 buffer_view_->updateMetrics();
 793                 updateScreen();
 794                 viewport()->update(QRect(0, 0, viewport()->width(), viewport()->height()));
 795                 schedule_redraw_ = false;
 796                 // Show the cursor immediately after the update.
 797                 hideCursor();
 798                 toggleCursor();
 799                 return;
 800         }
 801
 802         cursor_->update(x, y, h, shape);
 803         cursor_->show();
 804         viewport()->update(cursor_->rect());
 805 }
 806
 807
 808 void GuiWorkArea::removeCursor()
 809 {
 810         cursor_->hide();
 811         //if (!qApp->focusWidget())
 812                 viewport()->update(cursor_->rect());
 813 }
 814
 815
 816 void GuiWorkArea::inputMethodEvent(QInputMethodEvent * e)
 817 {
 818         QString const & commit_string = e->commitString();
 819         docstring const & preedit_string
 820                 = qstring_to_ucs4(e->preeditString());
 821
 822         if (!commit_string.isEmpty()) {
 823
 824                 LYXERR(Debug::KEY, "preeditString: " << fromqstr(e->preeditString())
 825                         << " commitString: " << fromqstr(e->commitString()));
 826
 827                 int key = 0;
 828
 829                 // FIXME Iwami 04/01/07: we should take care also of UTF16 surrogates here.
 830                 for (int i = 0; i != commit_string.size(); ++i) {
 831                         QKeyEvent ev(QEvent::KeyPress, key, Qt::NoModifier, commit_string[i]);
 832                         keyPressEvent(&ev);
 833                 }
 834         }
 835
 836         // Hide the cursor during the kana-kanji transformation.
 837         if (preedit_string.empty())
 838                 startBlinkingCursor();
 839         else
 840                 stopBlinkingCursor();
 841
 842         // last_width : for checking if last preedit string was/wasn't empty.
 843         static bool last_width = false;
 844         if (!last_width && preedit_string.empty()) {
 845                 // if last_width is last length of preedit string.
 846                 e->accept();
 847                 return;
 848         }
 849
 850         GuiPainter pain(&screen_);
 851         buffer_view_->updateMetrics();
 852         buffer_view_->draw(pain);
 853         FontInfo font = buffer_view_->cursor().getFont().fontInfo();
 854         FontMetrics const & fm = theFontMetrics(font);
 855         int height = fm.maxHeight();
 856         int cur_x = cursor_->rect().left();
 857         int cur_y = cursor_->rect().bottom();
 858
 859         // redraw area of preedit string.
 860         update(0, cur_y - height, viewport()->width(),
 861                 (height + 1) * preedit_lines_);
 862
 863         if (preedit_string.empty()) {
 864                 last_width = false;
 865                 preedit_lines_ = 1;
 866                 e->accept();
 867                 return;
 868         }
 869         last_width = true;
 870
 871         // att : stores an IM attribute.
 872         QList<QInputMethodEvent::Attribute> const & att = e->attributes();
 873
 874         // get attributes of input method cursor.
 875         // cursor_pos : cursor position in preedit string.
 876         size_t cursor_pos = 0;
 877         bool cursor_is_visible = false;
 878         for (int i = 0; i != att.size(); ++i) {
 879                 if (att.at(i).type == QInputMethodEvent::Cursor) {
 880                         cursor_pos = att.at(i).start;
 881                         cursor_is_visible = att.at(i).length != 0;
 882                         break;
 883                 }
 884         }
 885
 886         size_t preedit_length = preedit_string.length();
 887
 888         // get position of selection in input method.
 889         // FIXME: isn't there a way to do this simplier?
 890         // rStart : cursor position in selected string in IM.
 891         size_t rStart = 0;
 892         // rLength : selected string length in IM.
 893         size_t rLength = 0;
 894         if (cursor_pos < preedit_length) {
 895                 for (int i = 0; i != att.size(); ++i) {
 896                         if (att.at(i).type == QInputMethodEvent::TextFormat) {
 897                                 if (att.at(i).start <= int(cursor_pos)
 898                                         && int(cursor_pos) < att.at(i).start + att.at(i).length) {
 899                                                 rStart = att.at(i).start;
 900                                                 rLength = att.at(i).length;
 901                                                 if (!cursor_is_visible)
 902                                                         cursor_pos += rLength;
 903                                                 break;
 904                                 }
 905                         }
 906                 }
 907         }
 908         else {
 909                 rStart = cursor_pos;
 910                 rLength = 0;
 911         }
 912
 913         int const right_margin = rightMargin();
 914         Painter::preedit_style ps;
 915         // Most often there would be only one line:
 916         preedit_lines_ = 1;
 917         for (size_t pos = 0; pos != preedit_length; ++pos) {
 918                 char_type const typed_char = preedit_string[pos];
 919                 // reset preedit string style
 920                 ps = Painter::preedit_default;
 921
 922                 // if we reached the right extremity of the screen, go to next line.
 923                 if (cur_x + fm.width(typed_char) > viewport()->width() - right_margin) {
 924                         cur_x = right_margin;
 925                         cur_y += height + 1;
 926                         ++preedit_lines_;
 927                 }
 928                 // preedit strings are displayed with dashed underline
 929                 // and partial strings are displayed white on black indicating
 930                 // that we are in selecting mode in the input method.
 931                 // FIXME: rLength == preedit_length is not a changing condition
 932                 // FIXME: should be put out of the loop.
 933                 if (pos >= rStart
 934                         && pos < rStart + rLength
 935                         && !(cursor_pos < rLength && rLength == preedit_length))
 936                         ps = Painter::preedit_selecting;
 937
 938                 if (pos == cursor_pos
 939                         && (cursor_pos < rLength && rLength == preedit_length))
 940                         ps = Painter::preedit_cursor;
 941
 942                 // draw one character and update cur_x.
 943                 cur_x += pain.preeditText(cur_x, cur_y, typed_char, font, ps);
 944         }
 945
 946         // update the preedit string screen area.
 947         update(0, cur_y - preedit_lines_*height, viewport()->width(),
 948                 (height + 1) * preedit_lines_);
 949
 950         // Don't forget to accept the event!
 951         e->accept();
 952 }
 953
 954
 955 QVariant GuiWorkArea::inputMethodQuery(Qt::InputMethodQuery query) const
 956 {
 957         QRect cur_r(0,0,0,0);
 958         switch (query) {
 959                 // this is the CJK-specific composition window position.
 960                 case Qt::ImMicroFocus:
 961                         cur_r = cursor_->rect();
 962                         if (preedit_lines_ != 1)
 963                                 cur_r.moveLeft(10);
 964                         cur_r.moveBottom(cur_r.bottom() + cur_r.height() * preedit_lines_);
 965                         // return lower right of cursor in LyX.
 966                         return cur_r;
 967                 default:
 968                         return QWidget::inputMethodQuery(query);
 969         }
 970 }
 971
 972
 973 void GuiWorkArea::updateWindowTitle()
 974 {
 975         docstring maximize_title;
 976         docstring minimize_title;
 977
 978         Buffer & buf = buffer_view_->buffer();
 979         FileName const fileName = buf.fileName();
 980         if (!fileName.empty()) {
 981                 maximize_title = fileName.displayName(30);
 982                 minimize_title = from_utf8(fileName.onlyFileName());
 983                 if (!buf.isClean()) {
 984                         maximize_title += _(" (changed)");
 985                         minimize_title += char_type('*');
 986                 }
 987                 if (buf.isReadonly())
 988                         maximize_title += _(" (read only)");
 989         }
 990
 991         QString title = windowTitle();
 992         QString new_title = toqstr(maximize_title);
 993         if (title == new_title)
 994                 return;
 995
 996         QWidget::setWindowTitle(new_title);
 997         QWidget::setWindowIconText(toqstr(minimize_title));
 998         titleChanged(this);
 999 }
1000
1001
1002 void GuiWorkArea::setReadOnly(bool)
1003 {
1004         updateWindowTitle();
1005         if (this == lyx_view_->currentWorkArea())
1006                 lyx_view_->updateBufferDependent(false);
1007 }
1008
1009
1010 ////////////////////////////////////////////////////////////////////
1011 //
1012 // TabWorkArea
1013 //
1014 ////////////////////////////////////////////////////////////////////
1015
1016 TabWorkArea::TabWorkArea(QWidget * parent) : QTabWidget(parent)
1017 {
1018         QPalette pal = palette();
1019         pal.setColor(QPalette::Active, QPalette::Button,
1020                 pal.color(QPalette::Active, QPalette::Window));
1021         pal.setColor(QPalette::Disabled, QPalette::Button,
1022                 pal.color(QPalette::Disabled, QPalette::Window));
1023         pal.setColor(QPalette::Inactive, QPalette::Button,
1024                 pal.color(QPalette::Inactive, QPalette::Window));
1025
1026         QToolButton * closeTabButton = new QToolButton(this);
1027     closeTabButton->setPalette(pal);
1028         closeTabButton->setIcon(QIcon(":/images/closetab.png"));
1029         closeTabButton->setText("Close");
1030         closeTabButton->setAutoRaise(true);
1031         closeTabButton->setCursor(Qt::ArrowCursor);
1032         closeTabButton->setToolTip(tr("Close tab"));
1033         closeTabButton->setEnabled(true);
1034
1035         QObject::connect(this, SIGNAL(currentChanged(int)),
1036                 this, SLOT(on_currentTabChanged(int)));
1037         QObject::connect(closeTabButton, SIGNAL(clicked()),
1038                 this, SLOT(closeCurrentTab()));
1039
1040         setCornerWidget(closeTabButton);
1041         setUsesScrollButtons(true);
1042 }
1043
1044
1045 void TabWorkArea::showBar(bool show)
1046 {
1047         tabBar()->setEnabled(show);
1048         tabBar()->setVisible(show);
1049 }
1050
1051
1052 GuiWorkArea * TabWorkArea::currentWorkArea()
1053 {
1054         if (count() == 0)
1055                 return 0;
1056
1057         GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(currentWidget());
1058         BOOST_ASSERT(wa);
1059         return wa;
1060 }
1061
1062
1063 GuiWorkArea * TabWorkArea::workArea(Buffer & buffer)
1064 {
1065         for (int i = 0; i != count(); ++i) {
1066                 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i));
1067                 BOOST_ASSERT(wa);
1068                 if (&wa->bufferView().buffer() == &buffer)
1069                         return wa;
1070         }
1071         return 0;
1072 }
1073
1074
1075 void TabWorkArea::closeAll()
1076 {
1077         while (count()) {
1078                 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(0));
1079                 BOOST_ASSERT(wa);
1080                 removeTab(0);
1081                 delete wa;
1082         }
1083 }
1084
1085
1086 bool TabWorkArea::setCurrentWorkArea(GuiWorkArea * work_area)
1087 {
1088         BOOST_ASSERT(work_area);
1089         int index = indexOf(work_area);
1090         if (index == -1)
1091                 return false;
1092
1093         if (index == currentIndex())
1094                 // Make sure the work area is up to date.
1095                 on_currentTabChanged(index);
1096         else
1097                 // Switch to the work area.
1098                 setCurrentIndex(index);
1099         work_area->setFocus();
1100
1101         return true;
1102 }
1103
1104
1105 GuiWorkArea * TabWorkArea::addWorkArea(Buffer & buffer, GuiView & view)
1106 {
1107         GuiWorkArea * wa = new GuiWorkArea(buffer, view);
1108         wa->setUpdatesEnabled(false);
1109         // Hide tabbar if there's no tab (avoid a resize and a flashing tabbar
1110         // when hiding it again below).
1111         showBar(count() > 0);
1112         addTab(wa, wa->windowTitle());
1113         QObject::connect(wa, SIGNAL(titleChanged(GuiWorkArea *)),
1114                 this, SLOT(updateTabText(GuiWorkArea *)));
1115         // Hide tabbar if there's only one tab.
1116         showBar(count() > 1);
1117         return wa;
1118 }
1119
1120
1121 bool TabWorkArea::removeWorkArea(GuiWorkArea * work_area)
1122 {
1123         BOOST_ASSERT(work_area);
1124         int index = indexOf(work_area);
1125         if (index == -1)
1126                 return false;
1127
1128         work_area->setUpdatesEnabled(false);
1129         removeTab(index);
1130         delete work_area;
1131
1132         if (count()) {
1133                 // make sure the next work area is enabled.
1134                 currentWidget()->setUpdatesEnabled(true);
1135                 // Hide tabbar if there's only one tab.
1136                 showBar(count() > 1);
1137         }
1138         return true;
1139 }
1140
1141
1142 void TabWorkArea::on_currentTabChanged(int i)
1143 {
1144         GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i));
1145         BOOST_ASSERT(wa);
1146         BufferView & bv = wa->bufferView();
1147         bv.cursor().fixIfBroken();
1148         bv.updateMetrics();
1149         wa->setUpdatesEnabled(true);
1150         wa->redraw();
1151         wa->setFocus();
1152         ///
1153         currentWorkAreaChanged(wa);
1154
1155         LYXERR(Debug::GUI, "currentTabChanged " << i
1156                 << "File" << bv.buffer().absFileName());
1157 }
1158
1159
1160 void TabWorkArea::closeCurrentTab()
1161 {
1162         lyx::dispatch(FuncRequest(LFUN_BUFFER_CLOSE));
1163 }
1164
1165
1166 void TabWorkArea::updateTabText(GuiWorkArea * wa)
1167 {
1168         int const i = indexOf(wa);
1169         if (i < 0)
1170                 return;
1171         setTabText(i, wa->windowTitle());
1172 }
1173
1174 } // namespace frontend
1175 } // namespace lyx
1176
1177 #include "GuiWorkArea_moc.cpp"