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 "debug.h"
  22 #include "Font.h"
  23 #include "FuncRequest.h"
  24 #include "gettext.h"
  25 #include "GuiApplication.h"
  26 #include "GuiKeySymbol.h"
  27 #include "GuiPainter.h"
  28 #include "GuiView.h"
  29 #include "KeySymbol.h"
  30 #include "Language.h"
  31 #include "LyXFunc.h"
  32 #include "LyXRC.h"
  33 #include "MetricsInfo.h"
  34 #include "qt_helpers.h"
  35 #include "version.h"
  36
  37 #include "graphics/GraphicsImage.h"
  38 #include "graphics/GraphicsLoader.h"
  39
  40 #include "support/FileName.h"
  41 #include "support/ForkedcallsController.h"
  42
  43 #include "frontends/Application.h"
  44 #include "frontends/FontMetrics.h"
  45 #include "frontends/WorkAreaManager.h"
  46
  47 #include <QInputContext>
  48 #include <QLayout>
  49 #include <QMainWindow>
  50 #include <QPainter>
  51 #include <QToolButton>
  52 #include <QPalette>
  53 #include <QScrollBar>
  54 #include <QTabBar>
  55 #include <QTimer>
  56
  57 #include <boost/bind.hpp>
  58 #include <boost/current_function.hpp>
  59
  60 #ifdef Q_WS_X11
  61 #include <QX11Info>
  62 extern "C" int XEventsQueued(Display *display, int mode);
  63 #endif
  64
  65 #ifdef Q_WS_WIN
  66 int const CursorWidth = 2;
  67 #else
  68 int const CursorWidth = 1;
  69 #endif
  70
  71 #undef KeyPress
  72 #undef NoModifier
  73
  74 using std::endl;
  75 using std::min;
  76 using std::max;
  77 using std::string;
  78
  79 namespace lyx {
  80
  81 using support::FileName;
  82 using support::ForkedcallsController;
  83
  84
  85 /// return the LyX mouse button state from Qt's
  86 static mouse_button::state q_button_state(Qt::MouseButton button)
  87 {
  88         mouse_button::state b = mouse_button::none;
  89         switch (button) {
  90                 case Qt::LeftButton:
  91                         b = mouse_button::button1;
  92                         break;
  93                 case Qt::MidButton:
  94                         b = mouse_button::button2;
  95                         break;
  96                 case Qt::RightButton:
  97                         b = mouse_button::button3;
  98                         break;
  99                 default:
 100                         break;
 101         }
 102         return b;
 103 }
 104
 105
 106 /// return the LyX mouse button state from Qt's
 107 mouse_button::state q_motion_state(Qt::MouseButtons state)
 108 {
 109         mouse_button::state b = mouse_button::none;
 110         if (state & Qt::LeftButton)
 111                 b |= mouse_button::button1;
 112         if (state & Qt::MidButton)
 113                 b |= mouse_button::button2;
 114         if (state & Qt::RightButton)
 115                 b |= mouse_button::button3;
 116         return b;
 117 }
 118
 119
 120 namespace frontend {
 121
 122 class CursorWidget {
 123 public:
 124         CursorWidget() {}
 125
 126         void draw(QPainter & painter)
 127         {
 128                 if (show_ && rect_.isValid()) {
 129                         switch (shape_) {
 130                         case L_SHAPE:
 131                                 painter.fillRect(rect_.x(), rect_.y(), CursorWidth, rect_.height(), color_);
 132                                 painter.setPen(color_);
 133                                 painter.drawLine(rect_.bottomLeft().x() + CursorWidth, rect_.bottomLeft().y(),
 134                                                                                                  rect_.bottomRight().x(), rect_.bottomLeft().y());
 135                                 break;
 136
 137                         case REVERSED_L_SHAPE:
 138                                 painter.fillRect(rect_.x() + rect_.height() / 3, rect_.y(), CursorWidth, rect_.height(), color_);
 139                                 painter.setPen(color_);
 140                                 painter.drawLine(rect_.bottomRight().x() - CursorWidth, rect_.bottomLeft().y(),
 141                                                                                                          rect_.bottomLeft().x(), rect_.bottomLeft().y());
 142                                 break;
 143
 144                         default:
 145                                 painter.fillRect(rect_, color_);
 146                                 break;
 147                         }
 148                 }
 149         }
 150
 151         void update(int x, int y, int h, CursorShape shape)
 152         {
 153                 color_ = guiApp->colorCache().get(Color_cursor);
 154                 shape_ = shape;
 155                 switch (shape) {
 156                 case L_SHAPE:
 157                         rect_ = QRect(x, y, CursorWidth + h / 3, h);
 158                         break;
 159                 case REVERSED_L_SHAPE:
 160                         rect_ = QRect(x - h / 3, y, CursorWidth + h / 3, h);
 161                         break;
 162                 default:
 163                         rect_ = QRect(x, y, CursorWidth, h);
 164                         break;
 165                 }
 166         }
 167
 168         void show(bool set_show = true) { show_ = set_show; }
 169         void hide() { show_ = false; }
 170
 171         QRect const & rect() { return rect_; }
 172
 173 private:
 174         ///
 175         CursorShape shape_;
 176         ///
 177         bool show_;
 178         ///
 179         QColor color_;
 180         ///
 181         QRect rect_;
 182 };
 183
 184
 185 // This is a 'heartbeat' generating synthetic mouse move events when the
 186 // cursor is at the top or bottom edge of the viewport. One scroll per 0.2 s
 187 SyntheticMouseEvent::SyntheticMouseEvent()
 188         : timeout(200), restart_timeout(true),
 189           x_old(-1), y_old(-1), scrollbar_value_old(-1.0)
 190 {}
 191
 192
 193
 194 // All the below connection objects are needed because of a bug in some
 195 // versions of GCC (<=2.96 are on the suspects list.) By having and assigning
 196 // to these connections we avoid a segfault upon startup, and also at exit.
 197 // (Lgb)
 198
 199 static boost::signals::connection timecon;
 200
 201
 202 GuiWorkArea::GuiWorkArea(Buffer & buffer, GuiView & lv)
 203         : buffer_view_(new BufferView(buffer)), lyx_view_(&lv),
 204           cursor_visible_(false), cursor_timeout_(400),
 205     need_resize_(false), schedule_redraw_(false),
 206                 preedit_lines_(1)
 207 {
 208         buffer.workAreaManager().add(this);
 209         // Setup the signals
 210         timecon = cursor_timeout_.timeout
 211                 .connect(boost::bind(&GuiWorkArea::toggleCursor, this));
 212
 213         cursor_timeout_.start();
 214
 215         screen_ = QPixmap(viewport()->width(), viewport()->height());
 216         cursor_ = new frontend::CursorWidget();
 217         cursor_->hide();
 218
 219         setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
 220         setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
 221         setAcceptDrops(true);
 222         setMouseTracking(true);
 223         setMinimumSize(100, 70);
 224         updateWindowTitle();
 225
 226         viewport()->setAutoFillBackground(false);
 227         // We don't need double-buffering nor SystemBackground on
 228         // the viewport because we have our own backing pixmap.
 229         viewport()->setAttribute(Qt::WA_NoSystemBackground);
 230
 231         setFocusPolicy(Qt::WheelFocus);
 232
 233         viewport()->setCursor(Qt::IBeamCursor);
 234
 235         synthetic_mouse_event_.timeout.timeout.connect(
 236                 boost::bind(&GuiWorkArea::generateSyntheticMouseEvent,
 237                                         this));
 238
 239         // Initialize the vertical Scroll Bar
 240         QObject::connect(verticalScrollBar(), SIGNAL(actionTriggered(int)),
 241                 this, SLOT(adjustViewWithScrollBar(int)));
 242
 243         // disable context menu for the scrollbar
 244         verticalScrollBar()->setContextMenuPolicy(Qt::NoContextMenu);
 245
 246         // PageStep only depends on the viewport height.
 247         verticalScrollBar()->setPageStep(viewport()->height());
 248
 249         LYXERR(Debug::GUI, BOOST_CURRENT_FUNCTION
 250                 << "\n viewport width\t" << viewport()->width()
 251                 << "\n viewport height\t" << viewport()->height());
 252
 253         // Enables input methods for asian languages.
 254         // Must be set when creating custom text editing widgets.
 255         setAttribute(Qt::WA_InputMethodEnabled, true);
 256 }
 257
 258
 259
 260 GuiWorkArea::~GuiWorkArea()
 261 {
 262         buffer_view_->buffer().workAreaManager().remove(this);
 263         delete buffer_view_;
 264 }
 265
 266
 267 void GuiWorkArea::close()
 268 {
 269         lyx_view_->removeWorkArea(this);
 270 }
 271
 272
 273 BufferView & GuiWorkArea::bufferView()
 274 {
 275         return *buffer_view_;
 276 }
 277
 278
 279 BufferView const & GuiWorkArea::bufferView() const
 280 {
 281         return *buffer_view_;
 282 }
 283
 284
 285 void GuiWorkArea::stopBlinkingCursor()
 286 {
 287         cursor_timeout_.stop();
 288         hideCursor();
 289 }
 290
 291
 292 void GuiWorkArea::startBlinkingCursor()
 293 {
 294         showCursor();
 295         cursor_timeout_.restart();
 296 }
 297
 298
 299 void GuiWorkArea::redraw()
 300 {
 301         if (!isVisible())
 302                 // No need to redraw in this case.
 303                 return;
 304
 305         // No need to do anything if this is the current view. The BufferView
 306         // metrics are already up to date.
 307         if (lyx_view_ != guiApp->currentView()) {
 308                 // FIXME: it would be nice to optimize for the off-screen case.
 309                 buffer_view_->updateMetrics();
 310                 buffer_view_->cursor().fixIfBroken();
 311         }
 312
 313         updateScrollbar();
 314
 315         // update cursor position, because otherwise it has to wait until
 316         // the blinking interval is over
 317         if (cursor_visible_) {
 318                 hideCursor();
 319                 showCursor();
 320         }
 321
 322         LYXERR(Debug::WORKAREA, "WorkArea::redraw screen");
 323         updateScreen();
 324         update(0, 0, viewport()->width(), viewport()->height());
 325
 326         lyx_view_->updateStatusBar();
 327
 328         if (lyxerr.debugging(Debug::WORKAREA))
 329                 buffer_view_->coordCache().dump();
 330 }
 331
 332
 333 void GuiWorkArea::processKeySym(KeySymbol const & key, KeyModifier mod)
 334 {
 335         // In order to avoid bad surprise in the middle of an operation,
 336         // we better stop the blinking cursor.
 337         stopBlinkingCursor();
 338
 339         theLyXFunc().setLyXView(lyx_view_);
 340         theLyXFunc().processKeySym(key, mod);
 341         lyx_view_->updateLayoutList();
 342         lyx_view_->updateToolbars();
 343 }
 344
 345
 346 void GuiWorkArea::dispatch(FuncRequest const & cmd0, KeyModifier mod)
 347 {
 348         // Handle drag&drop
 349         if (cmd0.action == LFUN_FILE_OPEN) {
 350                 lyx_view_->dispatch(cmd0);
 351                 return;
 352         }
 353
 354         theLyXFunc().setLyXView(lyx_view_);
 355
 356         FuncRequest cmd;
 357
 358         if (cmd0.action == LFUN_MOUSE_PRESS) {
 359                 if (mod == ShiftModifier)
 360                         cmd = FuncRequest(cmd0, "region-select");
 361                 else if (mod == ControlModifier)
 362                         cmd = FuncRequest(cmd0, "paragraph-select");
 363                 else
 364                         cmd = cmd0;
 365         }
 366         else
 367                 cmd = cmd0;
 368
 369         // In order to avoid bad surprise in the middle of an operation, we better stop
 370         // the blinking cursor.
 371         if (!(cmd.action == LFUN_MOUSE_MOTION
 372                 && cmd.button() == mouse_button::none))
 373                 stopBlinkingCursor();
 374
 375         buffer_view_->mouseEventDispatch(cmd);
 376
 377         // Skip these when selecting
 378         if (cmd.action != LFUN_MOUSE_MOTION) {
 379                 lyx_view_->updateLayoutList();
 380                 lyx_view_->updateToolbars();
 381         }
 382
 383         // GUI tweaks except with mouse motion with no button pressed.
 384         if (!(cmd.action == LFUN_MOUSE_MOTION
 385                 && cmd.button() == mouse_button::none)) {
 386                 // Slight hack: this is only called currently when we
 387                 // clicked somewhere, so we force through the display
 388                 // of the new status here.
 389                 lyx_view_->clearMessage();
 390
 391                 // Show the cursor immediately after any operation.
 392                 startBlinkingCursor();
 393         }
 394 }
 395
 396
 397 void GuiWorkArea::resizeBufferView()
 398 {
 399         // WARNING: Please don't put any code that will trigger a repaint here!
 400         // We are already inside a paint event.
 401         lyx_view_->setBusy(true);
 402         buffer_view_->resize(viewport()->width(), viewport()->height());
 403         lyx_view_->updateLayoutList();
 404         lyx_view_->setBusy(false);
 405         need_resize_ = false;
 406 }
 407
 408
 409 void GuiWorkArea::showCursor()
 410 {
 411         if (cursor_visible_)
 412                 return;
 413
 414         CursorShape shape = BAR_SHAPE;
 415
 416         Font const & realfont = buffer_view_->cursor().real_current_font;
 417         BufferParams const & bp = buffer_view_->buffer().params();
 418         bool const samelang = realfont.language() == bp.language;
 419         bool const isrtl = realfont.isVisibleRightToLeft();
 420
 421         if (!samelang || isrtl != bp.language->rightToLeft()) {
 422                 shape = L_SHAPE;
 423                 if (isrtl)
 424                         shape = REVERSED_L_SHAPE;
 425         }
 426
 427         // The ERT language hack needs fixing up
 428         if (realfont.language() == latex_language)
 429                 shape = BAR_SHAPE;
 430
 431         Font const font = buffer_view_->cursor().getFont();
 432         FontMetrics const & fm = theFontMetrics(font);
 433         int const asc = fm.maxAscent();
 434         int const des = fm.maxDescent();
 435         int h = asc + des;
 436         int x = 0;
 437         int y = 0;
 438         buffer_view_->cursor().getPos(x, y);
 439         y -= asc;
 440
 441         // if it doesn't touch the screen, don't try to show it
 442         if (y + h < 0 || y >= viewport()->height())
 443                 return;
 444
 445         cursor_visible_ = true;
 446         showCursor(x, y, h, shape);
 447 }
 448
 449
 450 void GuiWorkArea::hideCursor()
 451 {
 452         if (!cursor_visible_)
 453                 return;
 454
 455         cursor_visible_ = false;
 456         removeCursor();
 457 }
 458
 459
 460 void GuiWorkArea::toggleCursor()
 461 {
 462         if (cursor_visible_)
 463                 hideCursor();
 464         else
 465                 showCursor();
 466
 467         // Use this opportunity to deal with any child processes that
 468         // have finished but are waiting to communicate this fact
 469         // to the rest of LyX.
 470         ForkedcallsController & fcc = ForkedcallsController::get();
 471         fcc.handleCompletedProcesses();
 472
 473         cursor_timeout_.restart();
 474 }
 475
 476
 477 void GuiWorkArea::updateScrollbar()
 478 {
 479         verticalScrollBar()->setTracking(false);
 480
 481         buffer_view_->updateScrollbar();
 482         ScrollbarParameters const & scroll_ = buffer_view_->scrollbarParameters();
 483
 484         // do what cursor movement does (some grey)
 485         int const h = scroll_.height + viewport()->height() / 4;
 486         int scroll_max_ = std::max(0, h - viewport()->height());
 487
 488         verticalScrollBar()->setRange(0, scroll_max_);
 489         verticalScrollBar()->setSliderPosition(scroll_.position);
 490         verticalScrollBar()->setSingleStep(scroll_.lineScrollHeight);
 491         verticalScrollBar()->setValue(scroll_.position);
 492
 493         verticalScrollBar()->setTracking(true);
 494 }
 495
 496
 497 void GuiWorkArea::adjustViewWithScrollBar(int action)
 498 {
 499         stopBlinkingCursor();
 500         if (action == QAbstractSlider::SliderPageStepAdd)
 501                 buffer_view_->scrollDown(viewport()->height());
 502         else if (action == QAbstractSlider::SliderPageStepSub)
 503                 buffer_view_->scrollUp(viewport()->height());
 504         else
 505                 buffer_view_->scrollDocView(verticalScrollBar()->sliderPosition());
 506
 507         if (lyxrc.cursor_follows_scrollbar) {
 508                 buffer_view_->setCursorFromScrollbar();
 509                 lyx_view_->updateLayoutList();
 510         }
 511         // Show the cursor immediately after any operation.
 512         startBlinkingCursor();
 513         QApplication::syncX();
 514 }
 515
 516
 517 void GuiWorkArea::focusInEvent(QFocusEvent * /*event*/)
 518 {
 519         // Repaint the whole screen.
 520         // Note: this is different from redraw() as only the backing pixmap
 521         // will be redrawn, which is cheap.
 522         viewport()->repaint();
 523
 524         startBlinkingCursor();
 525 }
 526
 527
 528 void GuiWorkArea::focusOutEvent(QFocusEvent * /*event*/)
 529 {
 530         stopBlinkingCursor();
 531 }
 532
 533
 534 void GuiWorkArea::mousePressEvent(QMouseEvent * e)
 535 {
 536         if (dc_event_.active && dc_event_ == *e) {
 537                 dc_event_.active = false;
 538                 FuncRequest cmd(LFUN_MOUSE_TRIPLE, e->x(), e->y(),
 539                         q_button_state(e->button()));
 540                 dispatch(cmd);
 541                 return;
 542         }
 543
 544         inputContext()->reset();
 545
 546         FuncRequest const cmd(LFUN_MOUSE_PRESS, e->x(), e->y(),
 547                 q_button_state(e->button()));
 548         dispatch(cmd, q_key_state(e->modifiers()));
 549 }
 550
 551
 552 void GuiWorkArea::mouseReleaseEvent(QMouseEvent * e)
 553 {
 554         if (synthetic_mouse_event_.timeout.running())
 555                 synthetic_mouse_event_.timeout.stop();
 556
 557         FuncRequest const cmd(LFUN_MOUSE_RELEASE, e->x(), e->y(),
 558                               q_button_state(e->button()));
 559         dispatch(cmd);
 560 }
 561
 562
 563 void GuiWorkArea::mouseMoveEvent(QMouseEvent * e)
 564 {
 565         // we kill the triple click if we move
 566         doubleClickTimeout();
 567         FuncRequest cmd(LFUN_MOUSE_MOTION, e->x(), e->y(),
 568                               q_motion_state(e->buttons()));
 569
 570         // If we're above or below the work area...
 571         if (e->y() <= 20 || e->y() >= viewport()->height() - 20) {
 572                 // Make sure only a synthetic event can cause a page scroll,
 573                 // so they come at a steady rate:
 574                 if (e->y() <= 20)
 575                         // _Force_ a scroll up:
 576                         cmd.y = -40;
 577                 else
 578                         cmd.y = viewport()->height();
 579                 // Store the event, to be handled when the timeout expires.
 580                 synthetic_mouse_event_.cmd = cmd;
 581
 582                 if (synthetic_mouse_event_.timeout.running())
 583                         // Discard the event. Note that it _may_ be handled
 584                         // when the timeout expires if
 585                         // synthetic_mouse_event_.cmd has not been overwritten.
 586                         // Ie, when the timeout expires, we handle the
 587                         // most recent event but discard all others that
 588                         // occurred after the one used to start the timeout
 589                         // in the first place.
 590                         return;
 591                 else {
 592                         synthetic_mouse_event_.restart_timeout = true;
 593                         synthetic_mouse_event_.timeout.start();
 594                         // Fall through to handle this event...
 595                 }
 596
 597         } else if (synthetic_mouse_event_.timeout.running()) {
 598                 // Store the event, to be possibly handled when the timeout
 599                 // expires.
 600                 // Once the timeout has expired, normal control is returned
 601                 // to mouseMoveEvent (restart_timeout = false).
 602                 // This results in a much smoother 'feel' when moving the
 603                 // mouse back into the work area.
 604                 synthetic_mouse_event_.cmd = cmd;
 605                 synthetic_mouse_event_.restart_timeout = false;
 606                 return;
 607         }
 608
 609         // Has anything changed on-screen since the last QMouseEvent
 610         // was received?
 611         double const scrollbar_value = verticalScrollBar()->value();
 612         if (e->x() != synthetic_mouse_event_.x_old ||
 613             e->y() != synthetic_mouse_event_.y_old ||
 614             scrollbar_value != synthetic_mouse_event_.scrollbar_value_old) {
 615                 // Yes it has. Store the params used to check this.
 616                 synthetic_mouse_event_.x_old = e->x();
 617                 synthetic_mouse_event_.y_old = e->y();
 618                 synthetic_mouse_event_.scrollbar_value_old = scrollbar_value;
 619
 620                 // ... and dispatch the event to the LyX core.
 621                 dispatch(cmd);
 622         }
 623 }
 624
 625
 626 void GuiWorkArea::wheelEvent(QWheelEvent * e)
 627 {
 628         // Wheel rotation by one notch results in a delta() of 120 (see
 629         // documentation of QWheelEvent)
 630         int const lines = qApp->wheelScrollLines() * e->delta() / 120;
 631         verticalScrollBar()->setValue(verticalScrollBar()->value() -
 632                         lines *  verticalScrollBar()->singleStep());
 633         adjustViewWithScrollBar();
 634 }
 635
 636
 637 void GuiWorkArea::generateSyntheticMouseEvent()
 638 {
 639 // Set things off to generate the _next_ 'pseudo' event.
 640         if (synthetic_mouse_event_.restart_timeout)
 641                 synthetic_mouse_event_.timeout.start();
 642
 643         // Has anything changed on-screen since the last timeout signal
 644         // was received?
 645         double const scrollbar_value = verticalScrollBar()->value();
 646         if (scrollbar_value != synthetic_mouse_event_.scrollbar_value_old) {
 647                 // Yes it has. Store the params used to check this.
 648                 synthetic_mouse_event_.scrollbar_value_old = scrollbar_value;
 649
 650                 // ... and dispatch the event to the LyX core.
 651                 dispatch(synthetic_mouse_event_.cmd);
 652         }
 653 }
 654
 655
 656 void GuiWorkArea::keyPressEvent(QKeyEvent * ev)
 657 {
 658         // do nothing if there are other events
 659         // (the auto repeated events come too fast)
 660         // \todo FIXME: remove hard coded Qt keys, process the key binding
 661 #ifdef Q_WS_X11
 662         if (XEventsQueued(QX11Info::display(), 0) > 1 && ev->isAutoRepeat()
 663                         && (Qt::Key_PageDown || Qt::Key_PageUp)) {
 664                 LYXERR(Debug::KEY, BOOST_CURRENT_FUNCTION
 665                         << "\nsystem is busy: scroll key event ignored");
 666                 ev->ignore();
 667                 return;
 668         }
 669 #endif
 670
 671         LYXERR(Debug::KEY, BOOST_CURRENT_FUNCTION
 672                 << " count=" << ev->count()
 673                 << " text=" << fromqstr(ev->text())
 674                 << " isAutoRepeat=" << ev->isAutoRepeat()
 675                 << " key=" << ev->key());
 676
 677         KeySymbol sym;
 678         setKeySymbol(&sym, ev);
 679         processKeySym(sym, q_key_state(ev->modifiers()));
 680 }
 681
 682
 683 void GuiWorkArea::doubleClickTimeout()
 684 {
 685         dc_event_.active = false;
 686 }
 687
 688
 689 void GuiWorkArea::mouseDoubleClickEvent(QMouseEvent * ev)
 690 {
 691         dc_event_ = DoubleClick(ev);
 692         QTimer::singleShot(QApplication::doubleClickInterval(), this,
 693                            SLOT(doubleClickTimeout()));
 694         FuncRequest cmd(LFUN_MOUSE_DOUBLE,
 695                         ev->x(), ev->y(),
 696                         q_button_state(ev->button()));
 697         dispatch(cmd);
 698 }
 699
 700
 701 void GuiWorkArea::resizeEvent(QResizeEvent * ev)
 702 {
 703         QAbstractScrollArea::resizeEvent(ev);
 704         need_resize_ = true;
 705 }
 706
 707
 708 void GuiWorkArea::update(int x, int y, int w, int h)
 709 {
 710         viewport()->repaint(x, y, w, h);
 711 }
 712
 713
 714 void GuiWorkArea::paintEvent(QPaintEvent * ev)
 715 {
 716         QRect const rc = ev->rect();
 717         /*
 718         LYXERR(Debug::PAINTING) << "paintEvent begin: x: " << rc.x()
 719                 << " y: " << rc.y()
 720                 << " w: " << rc.width()
 721                 << " h: " << rc.height() << endl;
 722         */
 723
 724         if (need_resize_) {
 725                 verticalScrollBar()->setPageStep(viewport()->height());
 726                 screen_ = QPixmap(viewport()->width(), viewport()->height());
 727                 resizeBufferView();
 728                 updateScreen();
 729                 hideCursor();
 730                 showCursor();
 731         }
 732
 733         QPainter pain(viewport());
 734         pain.drawPixmap(rc, screen_, rc);
 735         cursor_->draw(pain);
 736 }
 737
 738
 739 void GuiWorkArea::updateScreen()
 740 {
 741         GuiPainter pain(&screen_);
 742         buffer_view_->draw(pain);
 743 }
 744
 745
 746 void GuiWorkArea::showCursor(int x, int y, int h, CursorShape shape)
 747 {
 748         if (schedule_redraw_) {
 749                 buffer_view_->updateMetrics();
 750                 updateScreen();
 751                 viewport()->update(QRect(0, 0, viewport()->width(), viewport()->height()));
 752                 schedule_redraw_ = false;
 753                 // Show the cursor immediately after the update.
 754                 hideCursor();
 755                 toggleCursor();
 756                 return;
 757         }
 758
 759         cursor_->update(x, y, h, shape);
 760         cursor_->show();
 761         viewport()->update(cursor_->rect());
 762 }
 763
 764
 765 void GuiWorkArea::removeCursor()
 766 {
 767         cursor_->hide();
 768         //if (!qApp->focusWidget())
 769                 viewport()->update(cursor_->rect());
 770 }
 771
 772
 773 void GuiWorkArea::inputMethodEvent(QInputMethodEvent * e)
 774 {
 775         QString const & commit_string = e->commitString();
 776         docstring const & preedit_string
 777                 = qstring_to_ucs4(e->preeditString());
 778
 779         if (!commit_string.isEmpty()) {
 780
 781                 LYXERR(Debug::KEY, BOOST_CURRENT_FUNCTION
 782                         << " preeditString =" << fromqstr(e->preeditString())
 783                         << " commitString  =" << fromqstr(e->commitString()));
 784
 785                 int key = 0;
 786
 787                 // FIXME Iwami 04/01/07: we should take care also of UTF16 surrogates here.
 788                 for (int i = 0; i < commit_string.size(); ++i) {
 789                         QKeyEvent ev(QEvent::KeyPress, key, Qt::NoModifier, commit_string[i]);
 790                         keyPressEvent(&ev);
 791                 }
 792         }
 793
 794         // Hide the cursor during the kana-kanji transformation.
 795         if (preedit_string.empty())
 796                 startBlinkingCursor();
 797         else
 798                 stopBlinkingCursor();
 799
 800         // last_width : for checking if last preedit string was/wasn't empty.
 801         static bool last_width = false;
 802         if (!last_width && preedit_string.empty()) {
 803                 // if last_width is last length of preedit string.
 804                 e->accept();
 805                 return;
 806         }
 807
 808         GuiPainter pain(&screen_);
 809         buffer_view_->updateMetrics();
 810         buffer_view_->draw(pain);
 811         FontInfo font = buffer_view_->cursor().getFont().fontInfo();
 812         FontMetrics const & fm = theFontMetrics(font);
 813         int height = fm.maxHeight();
 814         int cur_x = cursor_->rect().left();
 815         int cur_y = cursor_->rect().bottom();
 816
 817         // redraw area of preedit string.
 818         update(0, cur_y - height, viewport()->width(),
 819                 (height + 1) * preedit_lines_);
 820
 821         if (preedit_string.empty()) {
 822                 last_width = false;
 823                 preedit_lines_ = 1;
 824                 e->accept();
 825                 return;
 826         }
 827         last_width = true;
 828
 829         // att : stores an IM attribute.
 830         QList<QInputMethodEvent::Attribute> const & att = e->attributes();
 831
 832         // get attributes of input method cursor.
 833         // cursor_pos : cursor position in preedit string.
 834         size_t cursor_pos = 0;
 835         bool cursor_is_visible = false;
 836         for (int i = 0; i < att.size(); ++i) {
 837                 if (att.at(i).type == QInputMethodEvent::Cursor) {
 838                         cursor_pos = att.at(i).start;
 839                         cursor_is_visible = att.at(i).length != 0;
 840                         break;
 841                 }
 842         }
 843
 844         size_t preedit_length = preedit_string.length();
 845
 846         // get position of selection in input method.
 847         // FIXME: isn't there a way to do this simplier?
 848         // rStart : cursor position in selected string in IM.
 849         size_t rStart = 0;
 850         // rLength : selected string length in IM.
 851         size_t rLength = 0;
 852         if (cursor_pos < preedit_length) {
 853                 for (int i = 0; i < att.size(); ++i) {
 854                         if (att.at(i).type == QInputMethodEvent::TextFormat) {
 855                                 if (att.at(i).start <= int(cursor_pos)
 856                                         && int(cursor_pos) < att.at(i).start + att.at(i).length) {
 857                                                 rStart = att.at(i).start;
 858                                                 rLength = att.at(i).length;
 859                                                 if (!cursor_is_visible)
 860                                                         cursor_pos += rLength;
 861                                                 break;
 862                                 }
 863                         }
 864                 }
 865         }
 866         else {
 867                 rStart = cursor_pos;
 868                 rLength = 0;
 869         }
 870
 871         int const right_margin = rightMargin();
 872         Painter::preedit_style ps;
 873         // Most often there would be only one line:
 874         preedit_lines_ = 1;
 875         for (size_t pos = 0; pos != preedit_length; ++pos) {
 876                 char_type const typed_char = preedit_string[pos];
 877                 // reset preedit string style
 878                 ps = Painter::preedit_default;
 879
 880                 // if we reached the right extremity of the screen, go to next line.
 881                 if (cur_x + fm.width(typed_char) > viewport()->width() - right_margin) {
 882                         cur_x = right_margin;
 883                         cur_y += height + 1;
 884                         ++preedit_lines_;
 885                 }
 886                 // preedit strings are displayed with dashed underline
 887                 // and partial strings are displayed white on black indicating
 888                 // that we are in selecting mode in the input method.
 889                 // FIXME: rLength == preedit_length is not a changing condition
 890                 // FIXME: should be put out of the loop.
 891                 if (pos >= rStart
 892                         && pos < rStart + rLength
 893                         && !(cursor_pos < rLength && rLength == preedit_length))
 894                         ps = Painter::preedit_selecting;
 895
 896                 if (pos == cursor_pos
 897                         && (cursor_pos < rLength && rLength == preedit_length))
 898                         ps = Painter::preedit_cursor;
 899
 900                 // draw one character and update cur_x.
 901                 cur_x += pain.preeditText(cur_x, cur_y, typed_char, font, ps);
 902         }
 903
 904         // update the preedit string screen area.
 905         update(0, cur_y - preedit_lines_*height, viewport()->width(),
 906                 (height + 1) * preedit_lines_);
 907
 908         // Don't forget to accept the event!
 909         e->accept();
 910 }
 911
 912
 913 QVariant GuiWorkArea::inputMethodQuery(Qt::InputMethodQuery query) const
 914 {
 915         QRect cur_r(0,0,0,0);
 916         switch (query) {
 917                 // this is the CJK-specific composition window position.
 918                 case Qt::ImMicroFocus:
 919                         cur_r = cursor_->rect();
 920                         if (preedit_lines_ != 1)
 921                                 cur_r.moveLeft(10);
 922                         cur_r.moveBottom(cur_r.bottom() + cur_r.height() * preedit_lines_);
 923                         // return lower right of cursor in LyX.
 924                         return cur_r;
 925                 default:
 926                         return QWidget::inputMethodQuery(query);
 927         }
 928 }
 929
 930
 931 void GuiWorkArea::updateWindowTitle()
 932 {
 933         docstring maximize_title;
 934         docstring minimize_title;
 935
 936         Buffer & buf = buffer_view_->buffer();
 937         FileName const fileName = buf.fileName();
 938         if (!fileName.empty()) {
 939                 maximize_title = fileName.displayName(30);
 940                 minimize_title = from_utf8(fileName.onlyFileName());
 941                 if (!buf.isClean()) {
 942                         maximize_title += _(" (changed)");
 943                         minimize_title += char_type('*');
 944                 }
 945                 if (buf.isReadonly())
 946                         maximize_title += _(" (read only)");
 947         }
 948
 949         QString title = windowTitle();
 950         QString new_title = toqstr(maximize_title);
 951         if (title == new_title)
 952                 return;
 953
 954         QWidget::setWindowTitle(new_title);
 955         QWidget::setWindowIconText(toqstr(minimize_title));
 956         titleChanged(this);
 957 }
 958
 959
 960 void GuiWorkArea::setReadOnly(bool)
 961 {
 962         updateWindowTitle();
 963         if (this == lyx_view_->currentWorkArea())
 964                 lyx_view_->updateBufferDependent(false);
 965 }
 966
 967
 968 ////////////////////////////////////////////////////////////////////
 969 //
 970 // TabWorkArea
 971 //
 972 ////////////////////////////////////////////////////////////////////
 973
 974 TabWorkArea::TabWorkArea(QWidget * parent) : QTabWidget(parent)
 975 {
 976         QPalette pal = palette();
 977         pal.setColor(QPalette::Active, QPalette::Button,
 978                 pal.color(QPalette::Active, QPalette::Window));
 979         pal.setColor(QPalette::Disabled, QPalette::Button,
 980                 pal.color(QPalette::Disabled, QPalette::Window));
 981         pal.setColor(QPalette::Inactive, QPalette::Button,
 982                 pal.color(QPalette::Inactive, QPalette::Window));
 983
 984         QToolButton * closeTabButton = new QToolButton(this);
 985     closeTabButton->setPalette(pal);
 986         closeTabButton->setIcon(QIcon(":/images/closetab.png"));
 987         closeTabButton->setText("Close");
 988         closeTabButton->setAutoRaise(true);
 989         closeTabButton->setCursor(Qt::ArrowCursor);
 990         closeTabButton->setToolTip(tr("Close tab"));
 991         closeTabButton->setEnabled(true);
 992
 993         QObject::connect(this, SIGNAL(currentChanged(int)),
 994                 this, SLOT(on_currentTabChanged(int)));
 995         QObject::connect(closeTabButton, SIGNAL(clicked()),
 996                 this, SLOT(closeCurrentTab()));
 997
 998         setCornerWidget(closeTabButton);
 999         setUsesScrollButtons(true);
1000 }
1001
1002
1003 void TabWorkArea::showBar(bool show)
1004 {
1005         tabBar()->setEnabled(show);
1006         tabBar()->setVisible(show);
1007 }
1008
1009
1010 GuiWorkArea * TabWorkArea::currentWorkArea()
1011 {
1012         if (count() == 0)
1013                 return 0;
1014
1015         GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(currentWidget());
1016         BOOST_ASSERT(wa);
1017         return wa;
1018 }
1019
1020
1021 GuiWorkArea * TabWorkArea::workArea(Buffer & buffer)
1022 {
1023         for (int i = 0; i != count(); ++i) {
1024                 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i));
1025                 BOOST_ASSERT(wa);
1026                 if (&wa->bufferView().buffer() == &buffer)
1027                         return wa;
1028         }
1029         return 0;
1030 }
1031
1032
1033 void TabWorkArea::closeAll()
1034 {
1035         while (count()) {
1036                 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(0));
1037                 BOOST_ASSERT(wa);
1038                 removeTab(0);
1039                 delete wa;
1040         }
1041 }
1042
1043
1044 bool TabWorkArea::setCurrentWorkArea(GuiWorkArea * work_area)
1045 {
1046         BOOST_ASSERT(work_area);
1047         int index = indexOf(work_area);
1048         if (index == -1)
1049                 return false;
1050
1051         if (index == currentIndex())
1052                 // Make sure the work area is up to date.
1053                 on_currentTabChanged(index);
1054         else
1055                 // Switch to the work area.
1056                 setCurrentIndex(index);
1057         work_area->setFocus();
1058
1059         return true;
1060 }
1061
1062
1063 GuiWorkArea * TabWorkArea::addWorkArea(Buffer & buffer, GuiView & view)
1064 {
1065         GuiWorkArea * wa = new GuiWorkArea(buffer, view);
1066         wa->setUpdatesEnabled(false);
1067         // Hide tabbar if there's no tab (avoid a resize and a flashing tabbar
1068         // when hiding it again below).
1069         showBar(count() > 0);
1070         addTab(wa, wa->windowTitle());
1071         QObject::connect(wa, SIGNAL(titleChanged(GuiWorkArea *)),
1072                 this, SLOT(updateTabText(GuiWorkArea *)));
1073         // Hide tabbar if there's only one tab.
1074         showBar(count() > 1);
1075         return wa;
1076 }
1077
1078
1079 bool TabWorkArea::removeWorkArea(GuiWorkArea * work_area)
1080 {
1081         BOOST_ASSERT(work_area);
1082         int index = indexOf(work_area);
1083         if (index == -1)
1084                 return false;
1085
1086         work_area->setUpdatesEnabled(false);
1087         removeTab(index);
1088         delete work_area;
1089
1090         if (count()) {
1091                 // make sure the next work area is enabled.
1092                 currentWidget()->setUpdatesEnabled(true);
1093                 // Hide tabbar if there's only one tab.
1094                 showBar(count() > 1);
1095         }
1096         return true;
1097 }
1098
1099
1100 void TabWorkArea::on_currentTabChanged(int i)
1101 {
1102         GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i));
1103         BOOST_ASSERT(wa);
1104         BufferView & bv = wa->bufferView();
1105         bv.cursor().fixIfBroken();
1106         bv.updateMetrics();
1107         wa->setUpdatesEnabled(true);
1108         wa->redraw();
1109         wa->setFocus();
1110         ///
1111         currentWorkAreaChanged(wa);
1112
1113         LYXERR(Debug::GUI, "currentTabChanged " << i
1114                 << "File" << bv.buffer().absFileName());
1115 }
1116
1117
1118 void TabWorkArea::closeCurrentTab()
1119 {
1120         lyx::dispatch(FuncRequest(LFUN_BUFFER_CLOSE));
1121 }
1122
1123
1124 void TabWorkArea::updateTabText(GuiWorkArea * wa)
1125 {
1126         int const i = indexOf(wa);
1127         if (i < 0)
1128                 return;
1129         setTabText(i, wa->windowTitle());
1130 }
1131
1132 } // namespace frontend
1133 } // namespace lyx
1134
1135 #include "GuiWorkArea_moc.cpp"