src/frontends/qt4/GuiWorkArea.cpp

   1 /**
   2  * \file GuiWorkArea.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author John Levon
   7  * \author Abdelrazak Younes
   8  *
   9  * Full author contact details are available in file CREDITS.
  10  */
  11
  12 #include <config.h>
  13
  14 #include "GuiWorkArea.h"
  15
  16 #include "Buffer.h"
  17 #include "BufferParams.h"
  18 #include "BufferView.h"
  19 #include "CoordCache.h"
  20 #include "Cursor.h"
  21 #include "Font.h"
  22 #include "FuncRequest.h"
  23 #include "GuiApplication.h"
  24 #include "GuiKeySymbol.h"
  25 #include "GuiPainter.h"
  26 #include "GuiPopupMenu.h"
  27 #include "GuiView.h"
  28 #include "KeySymbol.h"
  29 #include "Language.h"
  30 #include "LyXFunc.h"
  31 #include "LyXRC.h"
  32 #include "MetricsInfo.h"
  33 #include "qt_helpers.h"
  34 #include "version.h"
  35
  36 #include "graphics/GraphicsImage.h"
  37 #include "graphics/GraphicsLoader.h"
  38
  39 #include "support/debug.h"
  40 #include "support/gettext.h"
  41 #include "support/FileName.h"
  42 #include "support/ForkedCalls.h"
  43
  44 #include "frontends/Application.h"
  45 #include "frontends/FontMetrics.h"
  46 #include "frontends/WorkAreaManager.h"
  47
  48 #include <QContextMenuEvent>
  49 #include <QInputContext>
  50 #include <QHelpEvent>
  51 #include <QLayout>
  52 #include <QMainWindow>
  53 #include <QPainter>
  54 #include <QPalette>
  55 #include <QScrollBar>
  56 #include <QTabBar>
  57 #include <QTimer>
  58 #include <QToolButton>
  59 #include <QToolTip>
  60
  61 #include <boost/bind.hpp>
  62
  63 #ifdef Q_WS_X11
  64 #include <QX11Info>
  65 extern "C" int XEventsQueued(Display *display, int mode);
  66 #endif
  67
  68 #ifdef Q_WS_WIN
  69 int const CursorWidth = 2;
  70 #else
  71 int const CursorWidth = 1;
  72 #endif
  73
  74 #undef KeyPress
  75 #undef NoModifier
  76
  77 using namespace std;
  78 using namespace lyx::support;
  79
  80 namespace lyx {
  81
  82
  83 /// return the LyX mouse button state from Qt's
  84 static mouse_button::state q_button_state(Qt::MouseButton button)
  85 {
  86         mouse_button::state b = mouse_button::none;
  87         switch (button) {
  88                 case Qt::LeftButton:
  89                         b = mouse_button::button1;
  90                         break;
  91                 case Qt::MidButton:
  92                         b = mouse_button::button2;
  93                         break;
  94                 case Qt::RightButton:
  95                         b = mouse_button::button3;
  96                         break;
  97                 default:
  98                         break;
  99         }
 100         return b;
 101 }
 102
 103
 104 /// return the LyX mouse button state from Qt's
 105 mouse_button::state q_motion_state(Qt::MouseButtons state)
 106 {
 107         mouse_button::state b = mouse_button::none;
 108         if (state & Qt::LeftButton)
 109                 b |= mouse_button::button1;
 110         if (state & Qt::MidButton)
 111                 b |= mouse_button::button2;
 112         if (state & Qt::RightButton)
 113                 b |= mouse_button::button3;
 114         return b;
 115 }
 116
 117
 118 namespace frontend {
 119
 120 class CursorWidget {
 121 public:
 122         CursorWidget() {}
 123
 124         void draw(QPainter & painter)
 125         {
 126                 if (show_ && rect_.isValid()) {
 127                         switch (shape_) {
 128                         case L_SHAPE:
 129                                 painter.fillRect(rect_.x(), rect_.y(), CursorWidth, rect_.height(), color_);
 130                                 painter.setPen(color_);
 131                                 painter.drawLine(rect_.bottomLeft().x() + CursorWidth, rect_.bottomLeft().y(),
 132                                                                                                  rect_.bottomRight().x(), rect_.bottomLeft().y());
 133                                 break;
 134
 135                         case REVERSED_L_SHAPE:
 136                                 painter.fillRect(rect_.x() + rect_.height() / 3, rect_.y(), CursorWidth, rect_.height(), color_);
 137                                 painter.setPen(color_);
 138                                 painter.drawLine(rect_.bottomRight().x() - CursorWidth, rect_.bottomLeft().y(),
 139                                                                                                          rect_.bottomLeft().x(), rect_.bottomLeft().y());
 140                                 break;
 141
 142                         default:
 143                                 painter.fillRect(rect_, color_);
 144                                 break;
 145                         }
 146                 }
 147         }
 148
 149         void update(int x, int y, int h, CursorShape shape)
 150         {
 151                 color_ = guiApp->colorCache().get(Color_cursor);
 152                 shape_ = shape;
 153                 switch (shape) {
 154                 case L_SHAPE:
 155                         rect_ = QRect(x, y, CursorWidth + h / 3, h);
 156                         break;
 157                 case REVERSED_L_SHAPE:
 158                         rect_ = QRect(x - h / 3, y, CursorWidth + h / 3, h);
 159                         break;
 160                 default:
 161                         rect_ = QRect(x, y, CursorWidth, h);
 162                         break;
 163                 }
 164         }
 165
 166         void show(bool set_show = true) { show_ = set_show; }
 167         void hide() { show_ = false; }
 168
 169         QRect const & rect() { return rect_; }
 170
 171 private:
 172         ///
 173         CursorShape shape_;
 174         ///
 175         bool show_;
 176         ///
 177         QColor color_;
 178         ///
 179         QRect rect_;
 180 };
 181
 182
 183 // This is a 'heartbeat' generating synthetic mouse move events when the
 184 // cursor is at the top or bottom edge of the viewport. One scroll per 0.2 s
 185 SyntheticMouseEvent::SyntheticMouseEvent()
 186         : timeout(200), restart_timeout(true),
 187           x_old(-1), y_old(-1), scrollbar_value_old(-1.0)
 188 {}
 189
 190
 191
 192 GuiWorkArea::GuiWorkArea(Buffer & buffer, GuiView & lv)
 193         : buffer_view_(new BufferView(buffer)), lyx_view_(&lv),
 194           cursor_visible_(false),
 195     need_resize_(false), schedule_redraw_(false),
 196                 preedit_lines_(1)
 197 {
 198         buffer.workAreaManager().add(this);
 199         // Setup the signals
 200         connect(&cursor_timeout_, SIGNAL(timeout()),
 201                 this, SLOT(toggleCursor()));
 202
 203         int const time = QApplication::cursorFlashTime() / 2;
 204         if (time > 0) {
 205                 cursor_timeout_.setInterval(time);
 206                 cursor_timeout_.start();
 207         } else
 208                 // let's initialize this just to be safe
 209                 cursor_timeout_.setInterval(500);
 210
 211         general_timer_.setInterval(500);
 212         connect(&general_timer_, SIGNAL(timeout()),
 213                 this, SLOT(handleRegularEvents()));
 214
 215         screen_ = QPixmap(viewport()->width(), viewport()->height());
 216         cursor_ = new frontend::CursorWidget();
 217         cursor_->hide();
 218
 219         setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
 220         setAcceptDrops(true);
 221         setMouseTracking(true);
 222         setMinimumSize(100, 70);
 223         updateWindowTitle();
 224
 225         viewport()->setAutoFillBackground(false);
 226         // We don't need double-buffering nor SystemBackground on
 227         // the viewport because we have our own backing pixmap.
 228         viewport()->setAttribute(Qt::WA_NoSystemBackground);
 229
 230         setFocusPolicy(Qt::WheelFocus);
 231
 232         viewport()->setCursor(Qt::IBeamCursor);
 233
 234         synthetic_mouse_event_.timeout.timeout.connect(
 235                 boost::bind(&GuiWorkArea::generateSyntheticMouseEvent,
 236                                         this));
 237
 238         // Initialize the vertical Scroll Bar
 239         QObject::connect(verticalScrollBar(), SIGNAL(valueChanged(int)),
 240                 this, SLOT(scrollTo(int)));
 241
 242         LYXERR(Debug::GUI, "viewport width: " << viewport()->width()
 243                 << "  viewport height: " << viewport()->height());
 244
 245         // Enables input methods for asian languages.
 246         // Must be set when creating custom text editing widgets.
 247         setAttribute(Qt::WA_InputMethodEnabled, true);
 248 }
 249
 250
 251
 252 GuiWorkArea::~GuiWorkArea()
 253 {
 254         buffer_view_->buffer().workAreaManager().remove(this);
 255         delete buffer_view_;
 256         delete cursor_;
 257 }
 258
 259
 260 void GuiWorkArea::close()
 261 {
 262         lyx_view_->removeWorkArea(this);
 263 }
 264
 265
 266 BufferView & GuiWorkArea::bufferView()
 267 {
 268         return *buffer_view_;
 269 }
 270
 271
 272 BufferView const & GuiWorkArea::bufferView() const
 273 {
 274         return *buffer_view_;
 275 }
 276
 277
 278 void GuiWorkArea::stopBlinkingCursor()
 279 {
 280         cursor_timeout_.stop();
 281         hideCursor();
 282 }
 283
 284
 285 void GuiWorkArea::startBlinkingCursor()
 286 {
 287         showCursor();
 288         //we're not supposed to cache this value.
 289         int const time = QApplication::cursorFlashTime() / 2;
 290         if (time <= 0)
 291                 return;
 292         cursor_timeout_.setInterval(time);
 293         cursor_timeout_.start();
 294 }
 295
 296
 297 void GuiWorkArea::redraw()
 298 {
 299         if (!isVisible())
 300                 // No need to redraw in this case.
 301                 return;
 302
 303         // No need to do anything if this is the current view. The BufferView
 304         // metrics are already up to date.
 305         if (lyx_view_ != guiApp->currentView()) {
 306                 // FIXME: it would be nice to optimize for the off-screen case.
 307                 buffer_view_->updateMetrics();
 308                 buffer_view_->cursor().fixIfBroken();
 309         }
 310
 311         // update cursor position, because otherwise it has to wait until
 312         // the blinking interval is over
 313         if (cursor_visible_) {
 314                 hideCursor();
 315                 showCursor();
 316         }
 317
 318         LYXERR(Debug::WORKAREA, "WorkArea::redraw screen");
 319         updateScreen();
 320         update(0, 0, viewport()->width(), viewport()->height());
 321
 322         /// \warning: scrollbar updating *must* be done after the BufferView is drawn
 323         /// because \c BufferView::updateScrollbar() is called in \c BufferView::draw().
 324         updateScrollbar();
 325         lyx_view_->updateStatusBar();
 326
 327         if (lyxerr.debugging(Debug::WORKAREA))
 328                 buffer_view_->coordCache().dump();
 329 }
 330
 331
 332 void GuiWorkArea::processKeySym(KeySymbol const & key, KeyModifier mod)
 333 {
 334         // In order to avoid bad surprise in the middle of an operation,
 335         // we better stop the blinking cursor.
 336         stopBlinkingCursor();
 337
 338         theLyXFunc().setLyXView(lyx_view_);
 339         theLyXFunc().processKeySym(key, mod);
 340 }
 341
 342
 343 void GuiWorkArea::dispatch(FuncRequest const & cmd0, KeyModifier mod)
 344 {
 345         // Handle drag&drop
 346         if (cmd0.action == LFUN_FILE_OPEN) {
 347                 lyx_view_->dispatch(cmd0);
 348                 return;
 349         }
 350
 351         theLyXFunc().setLyXView(lyx_view_);
 352
 353         FuncRequest cmd;
 354
 355         if (cmd0.action == LFUN_MOUSE_PRESS) {
 356                 if (mod == ShiftModifier)
 357                         cmd = FuncRequest(cmd0, "region-select");
 358                 else if (mod == ControlModifier)
 359                         cmd = FuncRequest(cmd0, "paragraph-select");
 360                 else
 361                         cmd = cmd0;
 362         }
 363         else
 364                 cmd = cmd0;
 365
 366         // In order to avoid bad surprise in the middle of an operation, we better stop
 367         // the blinking cursor.
 368         if (!(cmd.action == LFUN_MOUSE_MOTION
 369                 && cmd.button() == mouse_button::none))
 370                 stopBlinkingCursor();
 371
 372         buffer_view_->mouseEventDispatch(cmd);
 373
 374         // Skip these when selecting
 375         if (cmd.action != LFUN_MOUSE_MOTION) {
 376                 lyx_view_->updateLayoutList();
 377                 lyx_view_->updateToolbars();
 378         }
 379
 380         // GUI tweaks except with mouse motion with no button pressed.
 381         if (!(cmd.action == LFUN_MOUSE_MOTION
 382                 && cmd.button() == mouse_button::none)) {
 383                 // Slight hack: this is only called currently when we
 384                 // clicked somewhere, so we force through the display
 385                 // of the new status here.
 386                 lyx_view_->clearMessage();
 387
 388                 // Show the cursor immediately after any operation.
 389                 startBlinkingCursor();
 390         }
 391 }
 392
 393
 394 void GuiWorkArea::resizeBufferView()
 395 {
 396         // WARNING: Please don't put any code that will trigger a repaint here!
 397         // We are already inside a paint event.
 398         lyx_view_->setBusy(true);
 399         buffer_view_->resize(viewport()->width(), viewport()->height());
 400         lyx_view_->updateLayoutList();
 401         lyx_view_->setBusy(false);
 402         need_resize_ = false;
 403 }
 404
 405
 406 void GuiWorkArea::showCursor()
 407 {
 408         if (cursor_visible_)
 409                 return;
 410
 411         CursorShape shape = BAR_SHAPE;
 412
 413         Font const & realfont = buffer_view_->cursor().real_current_font;
 414         BufferParams const & bp = buffer_view_->buffer().params();
 415         bool const samelang = realfont.language() == bp.language;
 416         bool const isrtl = realfont.isVisibleRightToLeft();
 417
 418         if (!samelang || isrtl != bp.language->rightToLeft()) {
 419                 shape = L_SHAPE;
 420                 if (isrtl)
 421                         shape = REVERSED_L_SHAPE;
 422         }
 423
 424         // The ERT language hack needs fixing up
 425         if (realfont.language() == latex_language)
 426                 shape = BAR_SHAPE;
 427
 428         Font const font = buffer_view_->cursor().getFont();
 429         FontMetrics const & fm = theFontMetrics(font);
 430         int const asc = fm.maxAscent();
 431         int const des = fm.maxDescent();
 432         int h = asc + des;
 433         int x = 0;
 434         int y = 0;
 435         buffer_view_->cursor().getPos(x, y);
 436         y -= asc;
 437
 438         // if it doesn't touch the screen, don't try to show it
 439         if (y + h < 0 || y >= viewport()->height())
 440                 return;
 441
 442         cursor_visible_ = true;
 443         showCursor(x, y, h, shape);
 444 }
 445
 446
 447 void GuiWorkArea::hideCursor()
 448 {
 449         if (!cursor_visible_)
 450                 return;
 451
 452         cursor_visible_ = false;
 453         removeCursor();
 454 }
 455
 456
 457 void GuiWorkArea::toggleCursor()
 458 {
 459         if (cursor_visible_)
 460                 hideCursor();
 461         else
 462                 showCursor();
 463 }
 464
 465
 466 void GuiWorkArea::handleRegularEvents()
 467 {
 468         ForkedCallsController::handleCompletedProcesses();
 469 }
 470
 471
 472 void GuiWorkArea::updateScrollbar()
 473 {
 474         ScrollbarParameters const & scroll_ = buffer_view_->scrollbarParameters();
 475
 476         verticalScrollBar()->setRange(scroll_.min, scroll_.max);
 477         verticalScrollBar()->setPageStep(scroll_.page_step);
 478         verticalScrollBar()->setSingleStep(scroll_.single_step);
 479         // Block the scrollbar signal to prevent recursive signal/slot calling.
 480         verticalScrollBar()->blockSignals(true);
 481         verticalScrollBar()->setValue(scroll_.position);
 482         verticalScrollBar()->setSliderPosition(scroll_.position);
 483         verticalScrollBar()->blockSignals(false);
 484 }
 485
 486
 487 void GuiWorkArea::scrollTo(int value)
 488 {
 489         stopBlinkingCursor();
 490         buffer_view_->scrollDocView(value);
 491
 492         if (lyxrc.cursor_follows_scrollbar) {
 493                 buffer_view_->setCursorFromScrollbar();
 494                 lyx_view_->updateLayoutList();
 495         }
 496         // Show the cursor immediately after any operation.
 497         startBlinkingCursor();
 498         QApplication::syncX();
 499 }
 500
 501
 502 bool GuiWorkArea::event(QEvent * e)
 503 {
 504         switch (e->type()) {
 505         case QEvent::ToolTip: {
 506                 QHelpEvent * helpEvent = static_cast<QHelpEvent *>(e);
 507                 if (lyxrc.use_tooltip) {
 508                         QPoint pos = helpEvent->pos();
 509                         if (pos.x() < viewport()->width()) {
 510                                 QString s = toqstr(buffer_view_->toolTip(pos.x(), pos.y()));
 511                                 QToolTip::showText(helpEvent->globalPos(), s);
 512                         }
 513                         else
 514                                 QToolTip::hideText();
 515                 }
 516                 // Don't forget to accept the event!
 517                 e->accept();
 518                 return true;
 519         }
 520
 521         case QEvent::ShortcutOverride: {
 522                 // We catch this event in order to catch the Tab or Shift+Tab key press
 523                 // which are otherwise reserved to focus switching between controls
 524                 // within a dialog.
 525                 QKeyEvent * ke = static_cast<QKeyEvent*>(e);
 526                 if ((ke->key() != Qt::Key_Tab && ke->key() != Qt::Key_Backtab)
 527                         || ke->modifiers() & Qt::ControlModifier)
 528                         return QAbstractScrollArea::event(e);
 529                 keyPressEvent(ke);
 530                 return true;
 531         }
 532
 533         default:
 534                 return QAbstractScrollArea::event(e);
 535         }
 536         return false;
 537 }
 538
 539
 540 void GuiWorkArea::contextMenuEvent(QContextMenuEvent * e)
 541 {
 542         QPoint pos = e->pos();
 543         docstring name = buffer_view_->contextMenu(pos.x(), pos.y());
 544         if (name.empty()) {
 545                 QAbstractScrollArea::contextMenuEvent(e);
 546                 return;
 547         }
 548         QMenu * menu = guiApp->menus().menu(toqstr(name));
 549         if (!menu) {
 550                 QAbstractScrollArea::contextMenuEvent(e);
 551                 return;
 552         }
 553         // Position the menu to the right.
 554         // FIXME: menu position should be different for RTL text.
 555         pos.rx() += menu->width();
 556         // FIXME: correct vertical position of the menu WRT screen espace.
 557         //pos.ry() += menu->height();
 558         menu->exec(pos);
 559         e->accept();
 560 }
 561
 562
 563 void GuiWorkArea::focusInEvent(QFocusEvent * /*event*/)
 564 {
 565         // Repaint the whole screen.
 566         // Note: this is different from redraw() as only the backing pixmap
 567         // will be redrawn, which is cheap.
 568         viewport()->repaint();
 569
 570         startBlinkingCursor();
 571 }
 572
 573
 574 void GuiWorkArea::focusOutEvent(QFocusEvent * /*event*/)
 575 {
 576         stopBlinkingCursor();
 577 }
 578
 579
 580 void GuiWorkArea::mousePressEvent(QMouseEvent * e)
 581 {
 582         if (dc_event_.active && dc_event_ == *e) {
 583                 dc_event_.active = false;
 584                 FuncRequest cmd(LFUN_MOUSE_TRIPLE, e->x(), e->y(),
 585                         q_button_state(e->button()));
 586                 dispatch(cmd);
 587                 return;
 588         }
 589
 590         inputContext()->reset();
 591
 592         FuncRequest const cmd(LFUN_MOUSE_PRESS, e->x(), e->y(),
 593                 q_button_state(e->button()));
 594         dispatch(cmd, q_key_state(e->modifiers()));
 595 }
 596
 597
 598 void GuiWorkArea::mouseReleaseEvent(QMouseEvent * e)
 599 {
 600         if (synthetic_mouse_event_.timeout.running())
 601                 synthetic_mouse_event_.timeout.stop();
 602
 603         FuncRequest const cmd(LFUN_MOUSE_RELEASE, e->x(), e->y(),
 604                               q_button_state(e->button()));
 605         dispatch(cmd);
 606 }
 607
 608
 609 void GuiWorkArea::mouseMoveEvent(QMouseEvent * e)
 610 {
 611         // we kill the triple click if we move
 612         doubleClickTimeout();
 613         FuncRequest cmd(LFUN_MOUSE_MOTION, e->x(), e->y(),
 614                               q_motion_state(e->buttons()));
 615
 616         // If we're above or below the work area...
 617         if (e->y() <= 20 || e->y() >= viewport()->height() - 20) {
 618                 // Make sure only a synthetic event can cause a page scroll,
 619                 // so they come at a steady rate:
 620                 if (e->y() <= 20)
 621                         // _Force_ a scroll up:
 622                         cmd.y = -40;
 623                 else
 624                         cmd.y = viewport()->height();
 625                 // Store the event, to be handled when the timeout expires.
 626                 synthetic_mouse_event_.cmd = cmd;
 627
 628                 if (synthetic_mouse_event_.timeout.running())
 629                         // Discard the event. Note that it _may_ be handled
 630                         // when the timeout expires if
 631                         // synthetic_mouse_event_.cmd has not been overwritten.
 632                         // Ie, when the timeout expires, we handle the
 633                         // most recent event but discard all others that
 634                         // occurred after the one used to start the timeout
 635                         // in the first place.
 636                         return;
 637                 else {
 638                         synthetic_mouse_event_.restart_timeout = true;
 639                         synthetic_mouse_event_.timeout.start();
 640                         // Fall through to handle this event...
 641                 }
 642
 643         } else if (synthetic_mouse_event_.timeout.running()) {
 644                 // Store the event, to be possibly handled when the timeout
 645                 // expires.
 646                 // Once the timeout has expired, normal control is returned
 647                 // to mouseMoveEvent (restart_timeout = false).
 648                 // This results in a much smoother 'feel' when moving the
 649                 // mouse back into the work area.
 650                 synthetic_mouse_event_.cmd = cmd;
 651                 synthetic_mouse_event_.restart_timeout = false;
 652                 return;
 653         }
 654
 655         // Has anything changed on-screen since the last QMouseEvent
 656         // was received?
 657         double const scrollbar_value = verticalScrollBar()->value();
 658         if (e->x() != synthetic_mouse_event_.x_old ||
 659             e->y() != synthetic_mouse_event_.y_old ||
 660             scrollbar_value != synthetic_mouse_event_.scrollbar_value_old) {
 661                 // Yes it has. Store the params used to check this.
 662                 synthetic_mouse_event_.x_old = e->x();
 663                 synthetic_mouse_event_.y_old = e->y();
 664                 synthetic_mouse_event_.scrollbar_value_old = scrollbar_value;
 665
 666                 // ... and dispatch the event to the LyX core.
 667                 dispatch(cmd);
 668         }
 669 }
 670
 671
 672 void GuiWorkArea::wheelEvent(QWheelEvent * e)
 673 {
 674         // Wheel rotation by one notch results in a delta() of 120 (see
 675         // documentation of QWheelEvent)
 676         double const lines = qApp->wheelScrollLines()
 677                 * lyxrc.mouse_wheel_speed
 678                 * e->delta() / 120.0;
 679         lyxerr << "wheelScrollLines = " << qApp->wheelScrollLines()
 680                 << " delta = " << e->delta()
 681                 << " lines = " << lines
 682                 << std::endl;
 683         verticalScrollBar()->setValue(verticalScrollBar()->value() -
 684                 int(lines *  verticalScrollBar()->singleStep()));
 685 }
 686
 687
 688 void GuiWorkArea::generateSyntheticMouseEvent()
 689 {
 690 // Set things off to generate the _next_ 'pseudo' event.
 691         if (synthetic_mouse_event_.restart_timeout)
 692                 synthetic_mouse_event_.timeout.start();
 693
 694         // Has anything changed on-screen since the last timeout signal
 695         // was received?
 696         double const scrollbar_value = verticalScrollBar()->value();
 697         if (scrollbar_value != synthetic_mouse_event_.scrollbar_value_old) {
 698                 // Yes it has. Store the params used to check this.
 699                 synthetic_mouse_event_.scrollbar_value_old = scrollbar_value;
 700
 701                 // ... and dispatch the event to the LyX core.
 702                 dispatch(synthetic_mouse_event_.cmd);
 703         }
 704 }
 705
 706
 707 void GuiWorkArea::keyPressEvent(QKeyEvent * ev)
 708 {
 709         // do nothing if there are other events
 710         // (the auto repeated events come too fast)
 711         // \todo FIXME: remove hard coded Qt keys, process the key binding
 712 #ifdef Q_WS_X11
 713         if (XEventsQueued(QX11Info::display(), 0) > 1 && ev->isAutoRepeat()
 714                         && (Qt::Key_PageDown || Qt::Key_PageUp)) {
 715                 LYXERR(Debug::KEY, "system is busy: scroll key event ignored");
 716                 ev->ignore();
 717                 return;
 718         }
 719 #endif
 720
 721         LYXERR(Debug::KEY, " count: " << ev->count()
 722                 << " text: " << fromqstr(ev->text())
 723                 << " isAutoRepeat: " << ev->isAutoRepeat() << " key: " << ev->key());
 724
 725         KeySymbol sym;
 726         setKeySymbol(&sym, ev);
 727         processKeySym(sym, q_key_state(ev->modifiers()));
 728         ev->accept();
 729 }
 730
 731
 732 void GuiWorkArea::doubleClickTimeout()
 733 {
 734         dc_event_.active = false;
 735 }
 736
 737
 738 void GuiWorkArea::mouseDoubleClickEvent(QMouseEvent * ev)
 739 {
 740         dc_event_ = DoubleClick(ev);
 741         QTimer::singleShot(QApplication::doubleClickInterval(), this,
 742                            SLOT(doubleClickTimeout()));
 743         FuncRequest cmd(LFUN_MOUSE_DOUBLE,
 744                         ev->x(), ev->y(),
 745                         q_button_state(ev->button()));
 746         dispatch(cmd);
 747 }
 748
 749
 750 void GuiWorkArea::resizeEvent(QResizeEvent * ev)
 751 {
 752         QAbstractScrollArea::resizeEvent(ev);
 753         need_resize_ = true;
 754 }
 755
 756
 757 void GuiWorkArea::update(int x, int y, int w, int h)
 758 {
 759         viewport()->repaint(x, y, w, h);
 760 }
 761
 762
 763 void GuiWorkArea::paintEvent(QPaintEvent * ev)
 764 {
 765         QRect const rc = ev->rect();
 766         // LYXERR(Debug::PAINTING, "paintEvent begin: x: " << rc.x()
 767         //      << " y: " << rc.y() << " w: " << rc.width() << " h: " << rc.height());
 768
 769         if (need_resize_) {
 770                 screen_ = QPixmap(viewport()->width(), viewport()->height());
 771                 resizeBufferView();
 772                 updateScreen();
 773                 hideCursor();
 774                 showCursor();
 775         }
 776
 777         QPainter pain(viewport());
 778         pain.drawPixmap(rc, screen_, rc);
 779         cursor_->draw(pain);
 780 }
 781
 782
 783 void GuiWorkArea::updateScreen()
 784 {
 785         GuiPainter pain(&screen_);
 786         buffer_view_->draw(pain);
 787 }
 788
 789
 790 void GuiWorkArea::showCursor(int x, int y, int h, CursorShape shape)
 791 {
 792         if (schedule_redraw_) {
 793                 buffer_view_->updateMetrics();
 794                 updateScreen();
 795                 viewport()->update(QRect(0, 0, viewport()->width(), viewport()->height()));
 796                 schedule_redraw_ = false;
 797                 // Show the cursor immediately after the update.
 798                 hideCursor();
 799                 toggleCursor();
 800                 return;
 801         }
 802
 803         cursor_->update(x, y, h, shape);
 804         cursor_->show();
 805         viewport()->update(cursor_->rect());
 806 }
 807
 808
 809 void GuiWorkArea::removeCursor()
 810 {
 811         cursor_->hide();
 812         //if (!qApp->focusWidget())
 813                 viewport()->update(cursor_->rect());
 814 }
 815
 816
 817 void GuiWorkArea::inputMethodEvent(QInputMethodEvent * e)
 818 {
 819         QString const & commit_string = e->commitString();
 820         docstring const & preedit_string
 821                 = qstring_to_ucs4(e->preeditString());
 822
 823         if (!commit_string.isEmpty()) {
 824
 825                 LYXERR(Debug::KEY, "preeditString: " << fromqstr(e->preeditString())
 826                         << " commitString: " << fromqstr(e->commitString()));
 827
 828                 int key = 0;
 829
 830                 // FIXME Iwami 04/01/07: we should take care also of UTF16 surrogates here.
 831                 for (int i = 0; i != commit_string.size(); ++i) {
 832                         QKeyEvent ev(QEvent::KeyPress, key, Qt::NoModifier, commit_string[i]);
 833                         keyPressEvent(&ev);
 834                 }
 835         }
 836
 837         // Hide the cursor during the kana-kanji transformation.
 838         if (preedit_string.empty())
 839                 startBlinkingCursor();
 840         else
 841                 stopBlinkingCursor();
 842
 843         // last_width : for checking if last preedit string was/wasn't empty.
 844         static bool last_width = false;
 845         if (!last_width && preedit_string.empty()) {
 846                 // if last_width is last length of preedit string.
 847                 e->accept();
 848                 return;
 849         }
 850
 851         GuiPainter pain(&screen_);
 852         buffer_view_->updateMetrics();
 853         buffer_view_->draw(pain);
 854         FontInfo font = buffer_view_->cursor().getFont().fontInfo();
 855         FontMetrics const & fm = theFontMetrics(font);
 856         int height = fm.maxHeight();
 857         int cur_x = cursor_->rect().left();
 858         int cur_y = cursor_->rect().bottom();
 859
 860         // redraw area of preedit string.
 861         update(0, cur_y - height, viewport()->width(),
 862                 (height + 1) * preedit_lines_);
 863
 864         if (preedit_string.empty()) {
 865                 last_width = false;
 866                 preedit_lines_ = 1;
 867                 e->accept();
 868                 return;
 869         }
 870         last_width = true;
 871
 872         // att : stores an IM attribute.
 873         QList<QInputMethodEvent::Attribute> const & att = e->attributes();
 874
 875         // get attributes of input method cursor.
 876         // cursor_pos : cursor position in preedit string.
 877         size_t cursor_pos = 0;
 878         bool cursor_is_visible = false;
 879         for (int i = 0; i != att.size(); ++i) {
 880                 if (att.at(i).type == QInputMethodEvent::Cursor) {
 881                         cursor_pos = att.at(i).start;
 882                         cursor_is_visible = att.at(i).length != 0;
 883                         break;
 884                 }
 885         }
 886
 887         size_t preedit_length = preedit_string.length();
 888
 889         // get position of selection in input method.
 890         // FIXME: isn't there a way to do this simplier?
 891         // rStart : cursor position in selected string in IM.
 892         size_t rStart = 0;
 893         // rLength : selected string length in IM.
 894         size_t rLength = 0;
 895         if (cursor_pos < preedit_length) {
 896                 for (int i = 0; i != att.size(); ++i) {
 897                         if (att.at(i).type == QInputMethodEvent::TextFormat) {
 898                                 if (att.at(i).start <= int(cursor_pos)
 899                                         && int(cursor_pos) < att.at(i).start + att.at(i).length) {
 900                                                 rStart = att.at(i).start;
 901                                                 rLength = att.at(i).length;
 902                                                 if (!cursor_is_visible)
 903                                                         cursor_pos += rLength;
 904                                                 break;
 905                                 }
 906                         }
 907                 }
 908         }
 909         else {
 910                 rStart = cursor_pos;
 911                 rLength = 0;
 912         }
 913
 914         int const right_margin = rightMargin();
 915         Painter::preedit_style ps;
 916         // Most often there would be only one line:
 917         preedit_lines_ = 1;
 918         for (size_t pos = 0; pos != preedit_length; ++pos) {
 919                 char_type const typed_char = preedit_string[pos];
 920                 // reset preedit string style
 921                 ps = Painter::preedit_default;
 922
 923                 // if we reached the right extremity of the screen, go to next line.
 924                 if (cur_x + fm.width(typed_char) > viewport()->width() - right_margin) {
 925                         cur_x = right_margin;
 926                         cur_y += height + 1;
 927                         ++preedit_lines_;
 928                 }
 929                 // preedit strings are displayed with dashed underline
 930                 // and partial strings are displayed white on black indicating
 931                 // that we are in selecting mode in the input method.
 932                 // FIXME: rLength == preedit_length is not a changing condition
 933                 // FIXME: should be put out of the loop.
 934                 if (pos >= rStart
 935                         && pos < rStart + rLength
 936                         && !(cursor_pos < rLength && rLength == preedit_length))
 937                         ps = Painter::preedit_selecting;
 938
 939                 if (pos == cursor_pos
 940                         && (cursor_pos < rLength && rLength == preedit_length))
 941                         ps = Painter::preedit_cursor;
 942
 943                 // draw one character and update cur_x.
 944                 cur_x += pain.preeditText(cur_x, cur_y, typed_char, font, ps);
 945         }
 946
 947         // update the preedit string screen area.
 948         update(0, cur_y - preedit_lines_*height, viewport()->width(),
 949                 (height + 1) * preedit_lines_);
 950
 951         // Don't forget to accept the event!
 952         e->accept();
 953 }
 954
 955
 956 QVariant GuiWorkArea::inputMethodQuery(Qt::InputMethodQuery query) const
 957 {
 958         QRect cur_r(0,0,0,0);
 959         switch (query) {
 960                 // this is the CJK-specific composition window position.
 961                 case Qt::ImMicroFocus:
 962                         cur_r = cursor_->rect();
 963                         if (preedit_lines_ != 1)
 964                                 cur_r.moveLeft(10);
 965                         cur_r.moveBottom(cur_r.bottom() + cur_r.height() * preedit_lines_);
 966                         // return lower right of cursor in LyX.
 967                         return cur_r;
 968                 default:
 969                         return QWidget::inputMethodQuery(query);
 970         }
 971 }
 972
 973
 974 void GuiWorkArea::updateWindowTitle()
 975 {
 976         docstring maximize_title;
 977         docstring minimize_title;
 978
 979         Buffer & buf = buffer_view_->buffer();
 980         FileName const fileName = buf.fileName();
 981         if (!fileName.empty()) {
 982                 maximize_title = fileName.displayName(30);
 983                 minimize_title = from_utf8(fileName.onlyFileName());
 984                 if (!buf.isClean()) {
 985                         maximize_title += _(" (changed)");
 986                         minimize_title += char_type('*');
 987                 }
 988                 if (buf.isReadonly())
 989                         maximize_title += _(" (read only)");
 990         }
 991
 992         QString title = windowTitle();
 993         QString new_title = toqstr(maximize_title);
 994         if (title == new_title)
 995                 return;
 996
 997         QWidget::setWindowTitle(new_title);
 998         QWidget::setWindowIconText(toqstr(minimize_title));
 999         titleChanged(this);
1000 }
1001
1002
1003 void GuiWorkArea::setReadOnly(bool)
1004 {
1005         updateWindowTitle();
1006         if (this == lyx_view_->currentWorkArea())
1007                 lyx_view_->updateBufferDependent(false);
1008 }
1009
1010
1011 ////////////////////////////////////////////////////////////////////
1012 //
1013 // TabWorkArea
1014 //
1015 ////////////////////////////////////////////////////////////////////
1016
1017 TabWorkArea::TabWorkArea(QWidget * parent) : QTabWidget(parent)
1018 {
1019         QPalette pal = palette();
1020         pal.setColor(QPalette::Active, QPalette::Button,
1021                 pal.color(QPalette::Active, QPalette::Window));
1022         pal.setColor(QPalette::Disabled, QPalette::Button,
1023                 pal.color(QPalette::Disabled, QPalette::Window));
1024         pal.setColor(QPalette::Inactive, QPalette::Button,
1025                 pal.color(QPalette::Inactive, QPalette::Window));
1026
1027         QToolButton * closeTabButton = new QToolButton(this);
1028     closeTabButton->setPalette(pal);
1029         closeTabButton->setIcon(QIcon(":/images/closetab.png"));
1030         closeTabButton->setText("Close");
1031         closeTabButton->setAutoRaise(true);
1032         closeTabButton->setCursor(Qt::ArrowCursor);
1033         closeTabButton->setToolTip(tr("Close tab"));
1034         closeTabButton->setEnabled(true);
1035
1036         QObject::connect(this, SIGNAL(currentChanged(int)),
1037                 this, SLOT(on_currentTabChanged(int)));
1038         QObject::connect(closeTabButton, SIGNAL(clicked()),
1039                 this, SLOT(closeCurrentTab()));
1040
1041         setCornerWidget(closeTabButton);
1042         setUsesScrollButtons(true);
1043 }
1044
1045
1046 void TabWorkArea::showBar(bool show)
1047 {
1048         tabBar()->setEnabled(show);
1049         tabBar()->setVisible(show);
1050 }
1051
1052
1053 GuiWorkArea * TabWorkArea::currentWorkArea()
1054 {
1055         if (count() == 0)
1056                 return 0;
1057
1058         GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(currentWidget());
1059         BOOST_ASSERT(wa);
1060         return wa;
1061 }
1062
1063
1064 GuiWorkArea * TabWorkArea::workArea(Buffer & buffer)
1065 {
1066         for (int i = 0; i != count(); ++i) {
1067                 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i));
1068                 BOOST_ASSERT(wa);
1069                 if (&wa->bufferView().buffer() == &buffer)
1070                         return wa;
1071         }
1072         return 0;
1073 }
1074
1075
1076 void TabWorkArea::closeAll()
1077 {
1078         while (count()) {
1079                 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(0));
1080                 BOOST_ASSERT(wa);
1081                 removeTab(0);
1082                 delete wa;
1083         }
1084 }
1085
1086
1087 bool TabWorkArea::setCurrentWorkArea(GuiWorkArea * work_area)
1088 {
1089         BOOST_ASSERT(work_area);
1090         int index = indexOf(work_area);
1091         if (index == -1)
1092                 return false;
1093
1094         if (index == currentIndex())
1095                 // Make sure the work area is up to date.
1096                 on_currentTabChanged(index);
1097         else
1098                 // Switch to the work area.
1099                 setCurrentIndex(index);
1100         work_area->setFocus();
1101
1102         return true;
1103 }
1104
1105
1106 GuiWorkArea * TabWorkArea::addWorkArea(Buffer & buffer, GuiView & view)
1107 {
1108         GuiWorkArea * wa = new GuiWorkArea(buffer, view);
1109         wa->setUpdatesEnabled(false);
1110         // Hide tabbar if there's no tab (avoid a resize and a flashing tabbar
1111         // when hiding it again below).
1112         showBar(count() > 0);
1113         addTab(wa, wa->windowTitle());
1114         QObject::connect(wa, SIGNAL(titleChanged(GuiWorkArea *)),
1115                 this, SLOT(updateTabText(GuiWorkArea *)));
1116         // Hide tabbar if there's only one tab.
1117         showBar(count() > 1);
1118         return wa;
1119 }
1120
1121
1122 bool TabWorkArea::removeWorkArea(GuiWorkArea * work_area)
1123 {
1124         BOOST_ASSERT(work_area);
1125         int index = indexOf(work_area);
1126         if (index == -1)
1127                 return false;
1128
1129         work_area->setUpdatesEnabled(false);
1130         removeTab(index);
1131         delete work_area;
1132
1133         if (count()) {
1134                 // make sure the next work area is enabled.
1135                 currentWidget()->setUpdatesEnabled(true);
1136                 // Hide tabbar if there's only one tab.
1137                 showBar(count() > 1);
1138         }
1139         return true;
1140 }
1141
1142
1143 void TabWorkArea::on_currentTabChanged(int i)
1144 {
1145         GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i));
1146         BOOST_ASSERT(wa);
1147         BufferView & bv = wa->bufferView();
1148         bv.cursor().fixIfBroken();
1149         bv.updateMetrics();
1150         wa->setUpdatesEnabled(true);
1151         wa->redraw();
1152         wa->setFocus();
1153         ///
1154         currentWorkAreaChanged(wa);
1155
1156         LYXERR(Debug::GUI, "currentTabChanged " << i
1157                 << "File" << bv.buffer().absFileName());
1158 }
1159
1160
1161 void TabWorkArea::closeCurrentTab()
1162 {
1163         lyx::dispatch(FuncRequest(LFUN_BUFFER_CLOSE));
1164 }
1165
1166
1167 void TabWorkArea::updateTabText(GuiWorkArea * wa)
1168 {
1169         int const i = indexOf(wa);
1170         if (i < 0)
1171                 return;
1172         setTabText(i, wa->windowTitle());
1173 }
1174
1175 } // namespace frontend
1176 } // namespace lyx
1177
1178 #include "GuiWorkArea_moc.cpp"