git.maemo.org Git - presencevnc/blob - src/vncview.cpp

   1 /****************************************************************************
   2 **
   3 ** Copyright (C) 2007-2008 Urs Wolfer <uwolfer @ kde.org>
   4 **
   5 ** This file is part of KDE.
   6 **
   7 ** This program is free software; you can redistribute it and/or modify
   8 ** it under the terms of the GNU General Public License as published by
   9 ** the Free Software Foundation; either version 2 of the License, or
  10 ** (at your option) any later version.
  11 **
  12 ** This program is distributed in the hope that it will be useful,
  13 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15 ** GNU General Public License for more details.
  16 **
  17 ** You should have received a copy of the GNU General Public License
  18 ** along with this program; see the file COPYING. If not, write to
  19 ** the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  20 ** Boston, MA 02110-1301, USA.
  21 **
  22 ****************************************************************************/
  23
  24 #include "vncview.h"
  25
  26 #include <QtGui>
  27
  28
  29 // Definition of key modifier mask constants
  30 #define KMOD_Alt_R      0x01
  31 #define KMOD_Alt_L      0x02
  32 #define KMOD_Meta_L     0x04
  33 #define KMOD_Control_L  0x08
  34 #define KMOD_Shift_L    0x10
  35
  36 //local cursor width/height in px, should be an odd number
  37 const int CURSOR_SIZE = 7;
  38
  39 //in miliseconds
  40 const int TAP_PRESS_TIME = 180;
  41 const int DOUBLE_TAP_UP_TIME = 500;
  42
  43
  44 VncView::VncView(QWidget *parent, const KUrl &url, RemoteView::Quality quality, int listen_port)
  45         : RemoteView(parent),
  46         m_initDone(false),
  47         m_buttonMask(0),
  48         cursor_x(0),
  49         cursor_y(0),
  50         m_quitFlag(false),
  51         m_firstPasswordTry(true),
  52         m_dontSendClipboard(false),
  53         m_horizontalFactor(1.0),
  54         m_verticalFactor(1.0),
  55         m_forceLocalCursor(false),
  56         quality(quality),
  57         listen_port(listen_port),
  58         transformation_mode(Qt::FastTransformation)
  59 {
  60     m_url = url;
  61     m_host = url.host();
  62     m_port = url.port();
  63
  64         //BlockingQueuedConnection can cause deadlocks when exiting, handled in startQuitting()
  65     connect(&vncThread, SIGNAL(imageUpdated(int, int, int, int)), this, SLOT(updateImage(int, int, int, int)), Qt::BlockingQueuedConnection);
  66     connect(&vncThread, SIGNAL(gotCut(const QString&)), this, SLOT(setCut(const QString&)), Qt::BlockingQueuedConnection);
  67     connect(&vncThread, SIGNAL(passwordRequest()), this, SLOT(requestPassword()), Qt::BlockingQueuedConnection);
  68     connect(&vncThread, SIGNAL(outputErrorMessage(QString)), this, SLOT(outputErrorMessage(QString)));
  69
  70         //don't miss early connection failures
  71         connect(&vncThread, SIGNAL(finished()), this, SLOT(startQuitting()));
  72
  73     m_clipboard = QApplication::clipboard();
  74     connect(m_clipboard, SIGNAL(selectionChanged()), this, SLOT(clipboardSelectionChanged()));
  75     connect(m_clipboard, SIGNAL(dataChanged()), this, SLOT(clipboardDataChanged()));
  76
  77     reloadSettings();
  78 }
  79
  80 VncView::~VncView()
  81 {
  82     unpressModifiers();
  83
  84     // Disconnect all signals so that we don't get any more callbacks from the client thread
  85     vncThread.disconnect();
  86
  87     startQuitting();
  88 }
  89
  90 bool VncView::eventFilter(QObject *obj, QEvent *event)
  91 {
  92     if (m_viewOnly) {
  93         if (event->type() == QEvent::KeyPress ||
  94                 event->type() == QEvent::KeyRelease ||
  95                 event->type() == QEvent::MouseButtonDblClick ||
  96                 event->type() == QEvent::MouseButtonPress ||
  97                 event->type() == QEvent::MouseButtonRelease ||
  98                 event->type() == QEvent::Wheel ||
  99                 event->type() == QEvent::MouseMove) {
 100
 101                         event->ignore();
 102             return true;
 103                 }
 104     }
 105
 106     return RemoteView::eventFilter(obj, event);
 107 }
 108
 109 QSize VncView::framebufferSize()
 110 {
 111     return m_frame.size();
 112 }
 113
 114 QSize VncView::sizeHint() const
 115 {
 116     return size();
 117 }
 118
 119 QSize VncView::minimumSizeHint() const
 120 {
 121     return size();
 122 }
 123
 124 void VncView::startQuitting()
 125 {
 126         if(isQuitting())
 127                 return;
 128
 129     kDebug(5011) << "about to quit";
 130
 131     setStatus(Disconnecting);
 132
 133     m_quitFlag = true;
 134
 135         vncThread.stop();
 136
 137     const bool quitSuccess = vncThread.wait(700);
 138         if(!quitSuccess) {
 139                 //happens when vncThread wants to call a slot via BlockingQueuedConnection,
 140                 //needs an event loop in this thread so execution continues after 'emit'
 141                 QEventLoop loop;
 142                 if(!loop.processEvents())
 143                         kDebug(5011) << "BUG: deadlocked, but no events to deliver?";
 144                 vncThread.wait(700);
 145         }
 146     setStatus(Disconnected);
 147 }
 148
 149 bool VncView::isQuitting()
 150 {
 151     return m_quitFlag;
 152 }
 153
 154 bool VncView::start()
 155 {
 156     vncThread.setHost(m_host);
 157     vncThread.setPort(m_port);
 158         vncThread.setListenPort(listen_port); //if port is != 0, thread will listen for connections
 159     vncThread.setQuality(quality);
 160
 161     // set local cursor on by default because low quality mostly means slow internet connection
 162     if (quality == RemoteView::Low) {
 163         showDotCursor(RemoteView::CursorOn);
 164     }
 165
 166     setStatus(Connecting);
 167
 168     vncThread.start();
 169     return true;
 170 }
 171
 172 bool VncView::supportsScaling() const
 173 {
 174     return true;
 175 }
 176
 177 bool VncView::supportsLocalCursor() const
 178 {
 179     return true;
 180 }
 181
 182 void VncView::requestPassword()
 183 {
 184     kDebug(5011) << "request password";
 185
 186     setStatus(Authenticating);
 187
 188     if (!m_url.password().isNull()) {
 189         vncThread.setPassword(m_url.password());
 190         return;
 191     }
 192
 193         QSettings settings;
 194         settings.beginGroup("hosts");
 195
 196         //check for saved password
 197         QString password = settings.value(QString("%1/password").arg(m_host), "").toString();
 198         if(m_firstPasswordTry and !password.isEmpty()) {
 199                 kDebug(5011) << "Trying saved password";
 200                 m_firstPasswordTry = false;
 201                 vncThread.setPassword(password);
 202                 return;
 203         }
 204         m_firstPasswordTry = false;
 205
 206         //build dialog
 207         QDialog dialog(this);
 208         dialog.setWindowTitle(tr("Password required"));
 209
 210         QLineEdit passwordbox;
 211         passwordbox.setEchoMode(QLineEdit::Password);
 212         passwordbox.setText(password);
 213         QCheckBox save_password(tr("Save Password"));
 214         save_password.setChecked(!password.isEmpty()); //offer to overwrite saved password
 215         QPushButton ok_button(tr("Done"));
 216         ok_button.setMaximumWidth(100);
 217         connect(&ok_button, SIGNAL(clicked()),
 218                 &dialog, SLOT(accept()));
 219
 220         QHBoxLayout layout1;
 221         QVBoxLayout layout2;
 222         layout2.addWidget(&passwordbox);
 223         if(!m_host.isEmpty()) //don't save incoming connections
 224                 layout2.addWidget(&save_password);
 225         layout1.addLayout(&layout2);
 226         layout1.addWidget(&ok_button);
 227         dialog.setLayout(&layout1);
 228
 229         if(dialog.exec()) { //dialog accepted
 230                 password = passwordbox.text();
 231
 232                 if(!m_host.isEmpty() and save_password.isChecked()) {
 233                         kDebug(5011) << "Saving password for host '" << m_host << "'";
 234
 235                         settings.setValue(QString("%1/password").arg(m_host), password);
 236                         settings.sync();
 237                 }
 238
 239                 vncThread.setPassword(password);
 240         } else {
 241                 vncThread.setPassword(QString()); //null string to exit
 242         }
 243 }
 244
 245 void VncView::outputErrorMessage(const QString &message)
 246 {
 247     if (message == "INTERNAL:APPLE_VNC_COMPATIBILTY") {
 248         setCursor(localDotCursor());
 249         m_forceLocalCursor = true;
 250         return;
 251     }
 252
 253     startQuitting();
 254
 255     emit errorMessage(i18n("VNC failure"), message);
 256 }
 257
 258 void VncView::updateImage(int x, int y, int w, int h)
 259 {
 260         if(!QApplication::focusWidget()) { //no focus, we're probably minimized
 261                 return;
 262         }
 263
 264      //kDebug(5011) << "got update" << width() << height();
 265
 266     m_x = x;
 267     m_y = y;
 268     m_w = w;
 269     m_h = h;
 270
 271     if (m_horizontalFactor != 1.0 || m_verticalFactor != 1.0) {
 272         // If the view is scaled, grow the update rectangle to avoid artifacts
 273         int x_extrapixels = 1.0/m_horizontalFactor + 1;
 274         int y_extrapixels = 1.0/m_verticalFactor + 1;
 275
 276         m_x-=x_extrapixels;
 277         m_y-=y_extrapixels;
 278         m_w+=2*x_extrapixels;
 279         m_h+=2*y_extrapixels;
 280     }
 281
 282     m_frame = vncThread.image();
 283
 284     if (!m_initDone) { //TODO this seems an odd place for initialization
 285         setAttribute(Qt::WA_StaticContents);
 286         setAttribute(Qt::WA_OpaquePaintEvent);
 287         installEventFilter(this);
 288
 289         setCursor(((m_dotCursorState == CursorOn) || m_forceLocalCursor) ? localDotCursor() : Qt::BlankCursor);
 290
 291         setMouseTracking(true); // get mouse events even when there is no mousebutton pressed
 292         setFocusPolicy(Qt::WheelFocus);
 293         setStatus(Connected);
 294         emit connected();
 295
 296                 resize(width(), height());
 297
 298         m_initDone = true;
 299
 300     }
 301
 302         static QSize old_frame_size = QSize();
 303     if ((y == 0 && x == 0) && (m_frame.size() != old_frame_size)) {
 304             old_frame_size = m_frame.size();
 305         kDebug(5011) << "Updating framebuffer size";
 306                 setZoomLevel();
 307                 useFastTransformations(false);
 308
 309         emit framebufferSizeChanged(m_frame.width(), m_frame.height());
 310     }
 311
 312     repaint(qRound(m_x * m_horizontalFactor), qRound(m_y * m_verticalFactor), qRound(m_w * m_horizontalFactor), qRound(m_h * m_verticalFactor));
 313 }
 314
 315 void VncView::setViewOnly(bool viewOnly)
 316 {
 317     RemoteView::setViewOnly(viewOnly);
 318
 319     m_dontSendClipboard = viewOnly;
 320
 321     if (viewOnly) {
 322                 showDotCursor(CursorOff);
 323         setCursor(Qt::ArrowCursor);
 324     } else {
 325         setCursor(m_dotCursorState == CursorOn ? localDotCursor() : Qt::BlankCursor);
 326         }
 327 }
 328
 329 void VncView::showDotCursor(DotCursorState state)
 330 {
 331     RemoteView::showDotCursor(state);
 332
 333     setCursor(state == CursorOn ? localDotCursor() : Qt::BlankCursor);
 334 }
 335
 336 //level should be in [0, 100]
 337 void VncView::setZoomLevel(int level)
 338 {
 339         Q_ASSERT(parentWidget() != 0);
 340
 341         if(level == -1) { //handle resize
 342                 resize(m_frame.width()*m_horizontalFactor, m_frame.height()*m_verticalFactor);
 343                 return;
 344         }
 345
 346         double magnification;
 347         if(level == 100) {
 348                 magnification = 2.0;
 349         } else if(level >= 90) {
 350                 magnification = 1.0;
 351         } else {
 352                 const double min_horiz_magnification = double(parentWidget()->width())/m_frame.width();
 353                 const double min_vert_magnification = double(parentWidget()->height())/m_frame.height();
 354                 const double fit_screen_magnification = qMin(min_horiz_magnification, min_vert_magnification);
 355
 356                 //level=90 => magnification=1.0, level=0 => magnification=fit_screen_magnification
 357                 magnification = (level)/90.0*(1.0 - fit_screen_magnification) + fit_screen_magnification;
 358         }
 359
 360         if(magnification < 0                    //remote display smaller than local?
 361         or magnification != magnification)      //nan
 362                 magnification = 1.0;
 363
 364         m_verticalFactor = m_horizontalFactor = magnification;
 365         resize(m_frame.width()*magnification, m_frame.height()*magnification);
 366 }
 367
 368 void VncView::setCut(const QString &text)
 369 {
 370     m_dontSendClipboard = true;
 371     m_clipboard->setText(text, QClipboard::Clipboard);
 372     m_clipboard->setText(text, QClipboard::Selection);
 373     m_dontSendClipboard = false;
 374 }
 375
 376 void VncView::paintEvent(QPaintEvent *event)
 377 {
 378     if (m_frame.isNull() || m_frame.format() == QImage::Format_Invalid) {
 379         //no valid image to paint
 380         RemoteView::paintEvent(event);
 381         return;
 382     }
 383
 384     event->accept();
 385
 386         const QRect update_rect = event->rect();
 387     QPainter painter(this);
 388         if (update_rect != rect()) {
 389                 // kDebug(5011) << "Partial repaint";
 390                 const int sx = qRound(update_rect.x()/m_horizontalFactor);
 391                 const int sy = qRound(update_rect.y()/m_verticalFactor);
 392                 const int sw = qRound(update_rect.width()/m_horizontalFactor);
 393                 const int sh = qRound(update_rect.height()/m_verticalFactor);
 394
 395                 painter.drawImage(update_rect,
 396                           m_frame.copy(sx, sy, sw, sh)
 397                           .scaled(update_rect.size(), Qt::IgnoreAspectRatio, transformation_mode));
 398         } else {
 399                 //kDebug(5011) << "Full repaint" << width() << height() << m_frame.width() << m_frame.height();
 400
 401                 painter.drawImage(rect(),
 402                         m_frame.scaled(size(), Qt::IgnoreAspectRatio, transformation_mode));
 403     }
 404
 405         //draw local cursor ourselves, normal mouse pointer doesn't deal with scrolling
 406         if((m_dotCursorState == CursorOn) || m_forceLocalCursor) {
 407 #if QT_VERSION >= 0x040500
 408                 painter.setCompositionMode(QPainter::RasterOp_SourceXorDestination);
 409 #endif
 410                 //rectangle size includes 1px pen width
 411                 painter.drawRect(cursor_x*m_horizontalFactor - CURSOR_SIZE/2, cursor_y*m_verticalFactor - CURSOR_SIZE/2, CURSOR_SIZE-1, CURSOR_SIZE-1);
 412         }
 413
 414     RemoteView::paintEvent(event);
 415 }
 416
 417 void VncView::resizeEvent(QResizeEvent *event)
 418 {
 419     RemoteView::resizeEvent(event);
 420     update();
 421 }
 422
 423 bool VncView::event(QEvent *event)
 424 {
 425         switch (event->type()) {
 426         case QEvent::KeyPress:
 427         case QEvent::KeyRelease:
 428                 keyEventHandler(static_cast<QKeyEvent*>(event));
 429                 return true;
 430
 431         case QEvent::MouseButtonDblClick:
 432         case QEvent::MouseButtonPress:
 433         case QEvent::MouseButtonRelease:
 434         case QEvent::MouseMove:
 435                 mouseEventHandler(static_cast<QMouseEvent*>(event));
 436                 return true;
 437
 438         case QEvent::Wheel:
 439                 wheelEventHandler(static_cast<QWheelEvent*>(event));
 440                 return true;
 441
 442         case QEvent::WindowActivate: //input panel may have been closed, prevent IM from interfering with hardware keyboard
 443                 setAttribute(Qt::WA_InputMethodEnabled, false);
 444                 //fall through
 445         default:
 446                 return RemoteView::event(event);
 447         }
 448 }
 449
 450 //call with e == 0 to flush held events
 451 void VncView::mouseEventHandler(QMouseEvent *e)
 452 {
 453         static bool tap_detected = false;
 454         static bool double_tap_detected = false;
 455         static bool tap_drag_detected = false;
 456         static QTime press_time;
 457         static QTime up_time; //used for double clicks/tap&drag, for time after first tap
 458
 459         if(!e) { //flush held taps
 460                 if(tap_detected) {
 461                         m_buttonMask |= 0x01;
 462                         vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 463                         m_buttonMask &= 0xfe;
 464                         vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 465                         tap_detected = false;
 466                 } else if(double_tap_detected and press_time.elapsed() > TAP_PRESS_TIME) { //got tap + another press -> tap & drag
 467                         m_buttonMask |= 0x01;
 468                         vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 469                         double_tap_detected = false;
 470                         tap_drag_detected = true;
 471                 }
 472
 473                 return;
 474         }
 475
 476         if(e->x() < 0 or e->y() < 0) { //QScrollArea tends to send invalid events sometimes...
 477                 e->ignore();
 478                 return;
 479         }
 480
 481         cursor_x = qRound(e->x()/m_horizontalFactor);
 482         cursor_y = qRound(e->y()/m_verticalFactor);
 483         vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask); // plain move event
 484
 485         if(!disable_tapping and e->button() == Qt::LeftButton) { //implement touchpad-like input for left button
 486                 if(e->type() == QEvent::MouseButtonPress or e->type() == QEvent::MouseButtonDblClick) {
 487                         press_time.start();
 488                         if(tap_detected and up_time.elapsed() < DOUBLE_TAP_UP_TIME) {
 489                                 tap_detected = false;
 490                                 double_tap_detected = true;
 491
 492                                 QTimer::singleShot(TAP_PRESS_TIME, this, SLOT(mouseEventHandler()));
 493                         }
 494                 } else if(e->type() == QEvent::MouseButtonRelease) {
 495                         if(tap_drag_detected) {
 496                                 m_buttonMask &= 0xfe;
 497                                 vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 498                                 tap_drag_detected = false;
 499                         } else if(double_tap_detected) { //double click
 500                                 double_tap_detected = false;
 501
 502                                 m_buttonMask |= 0x01;
 503                                 vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 504                                 m_buttonMask &= 0xfe;
 505                                 vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 506                                 m_buttonMask |= 0x01;
 507                                 vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 508                                 m_buttonMask &= 0xfe;
 509                                 vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 510                         } else if(press_time.elapsed() < TAP_PRESS_TIME) { //tap
 511                                 up_time.start();
 512                                 tap_detected = true;
 513                                 QTimer::singleShot(DOUBLE_TAP_UP_TIME, this, SLOT(mouseEventHandler()));
 514                         }
 515
 516                 }
 517         } else { //middle or right button, send directly
 518                 if ((e->type() == QEvent::MouseButtonPress)) {
 519                     if (e->button() & Qt::MidButton)
 520                         m_buttonMask |= 0x02;
 521                     if (e->button() & Qt::RightButton)
 522                         m_buttonMask |= 0x04;
 523                 } else if (e->type() == QEvent::MouseButtonRelease) {
 524                     if (e->button() & Qt::MidButton)
 525                         m_buttonMask &= 0xfd;
 526                     if (e->button() & Qt::RightButton)
 527                         m_buttonMask &= 0xfb;
 528                 }
 529                 vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 530         }
 531
 532         //prevent local cursor artifacts
 533         static int old_cursor_x = cursor_x;
 534         static int old_cursor_y = cursor_y;
 535         if(((m_dotCursorState == CursorOn) || m_forceLocalCursor)
 536         and (cursor_x != old_cursor_x or cursor_y != old_cursor_y)) {
 537                 //clear last position
 538                 repaint(old_cursor_x*m_horizontalFactor - CURSOR_SIZE/2, old_cursor_y*m_verticalFactor - CURSOR_SIZE/2, CURSOR_SIZE, CURSOR_SIZE);
 539                 //and refresh new one
 540                 repaint(cursor_x*m_horizontalFactor - CURSOR_SIZE/2, cursor_y*m_verticalFactor - CURSOR_SIZE/2, CURSOR_SIZE, CURSOR_SIZE);
 541
 542                 old_cursor_x = cursor_x; old_cursor_y = cursor_y;
 543         }
 544 }
 545
 546 void VncView::wheelEventHandler(QWheelEvent *event)
 547 {
 548     int eb = 0;
 549     if (event->delta() < 0)
 550         eb |= 0x10;
 551     else
 552         eb |= 0x8;
 553
 554     const int x = qRound(event->x() / m_horizontalFactor);
 555     const int y = qRound(event->y() / m_verticalFactor);
 556
 557     vncThread.mouseEvent(x, y, eb | m_buttonMask);
 558     vncThread.mouseEvent(x, y, m_buttonMask);
 559 }
 560
 561 void VncView::keyEventHandler(QKeyEvent *e)
 562 {
 563     // strip away autorepeating KeyRelease; see bug #206598
 564     if (e->isAutoRepeat() && (e->type() == QEvent::KeyRelease)) {
 565         return;
 566     }
 567
 568 // parts of this code are based on http://italc.sourcearchive.com/documentation/1.0.9.1/vncview_8cpp-source.html
 569     rfbKeySym k = e->nativeVirtualKey();
 570
 571     // we do not handle Key_Backtab separately as the Shift-modifier
 572     // is already enabled
 573     if (e->key() == Qt::Key_Backtab) {
 574         k = XK_Tab;
 575     }
 576
 577     const bool pressed = (e->type() == QEvent::KeyPress);
 578
 579 #ifdef Q_WS_MAEMO_5
 580     //don't send ISO_Level3_Shift (would break things like Win+0-9)
 581     //also enable IM so symbol key works
 582     if(k == 0xfe03) {
 583             setAttribute(Qt::WA_InputMethodEnabled, pressed);
 584             e->ignore();
 585             return;
 586     }
 587 #endif
 588
 589     // handle modifiers
 590     if (k == XK_Shift_L || k == XK_Control_L || k == XK_Meta_L || k == XK_Alt_L) {
 591         if (pressed) {
 592             m_mods[k] = true;
 593         } else if (m_mods.contains(k)) {
 594             m_mods.remove(k);
 595         } else {
 596             unpressModifiers();
 597         }
 598     }
 599
 600
 601         int current_zoom = -1;
 602         if(e->key() == Qt::Key_F8)
 603                 current_zoom = left_zoom;
 604         else if(e->key() == Qt::Key_F7)
 605                 current_zoom = right_zoom;
 606         else if (k) {
 607                 // kDebug(5011) << "got '" << e->text() << "'.";
 608                 vncThread.keyEvent(k, pressed);
 609         } else {
 610                 kDebug(5011) << "nativeVirtualKey() for '" << e->text() << "' failed.";
 611                 return;
 612         }
 613
 614         if(current_zoom == -1)
 615                 return;
 616
 617         //handle zoom buttons
 618         if(current_zoom == 0) { //left click
 619                 if(pressed)
 620                         m_buttonMask |= 0x01;
 621                 else
 622                         m_buttonMask &= 0xfe;
 623                 vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 624         } else if(current_zoom == 1) { //right click
 625                 if(pressed)
 626                         m_buttonMask |= 0x04;
 627                 else
 628                         m_buttonMask &= 0xfb;
 629                 vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 630         } else if(current_zoom == 2) { //middle click
 631                 if(pressed)
 632                         m_buttonMask |= 0x02;
 633                 else
 634                         m_buttonMask &= 0xfd;
 635                 vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 636         } else if(current_zoom == 3 and pressed) { //wheel up
 637                 int eb = 0x8;
 638                 vncThread.mouseEvent(cursor_x, cursor_y, eb | m_buttonMask);
 639                 vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 640         } else if(current_zoom == 4 and pressed) { //wheel down
 641                 int eb = 0x10;
 642                 vncThread.mouseEvent(cursor_x, cursor_y, eb | m_buttonMask);
 643                 vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 644         } else if(current_zoom == 5) { //page up
 645                 vncThread.keyEvent(0xff55, pressed);
 646         } else if(current_zoom == 6) { //page down
 647                 vncThread.keyEvent(0xff56, pressed);
 648         }
 649 }
 650
 651 void VncView::unpressModifiers()
 652 {
 653     const QList<unsigned int> keys = m_mods.keys();
 654     QList<unsigned int>::const_iterator it = keys.constBegin();
 655     while (it != keys.end()) {
 656         vncThread.keyEvent(*it, false);
 657         it++;
 658     }
 659     m_mods.clear();
 660 }
 661
 662 void VncView::clipboardSelectionChanged()
 663 {
 664     if (m_status != Connected)
 665         return;
 666
 667     if (m_clipboard->ownsSelection() || m_dontSendClipboard)
 668         return;
 669
 670     const QString text = m_clipboard->text(QClipboard::Selection);
 671
 672     vncThread.clientCut(text);
 673 }
 674
 675 void VncView::clipboardDataChanged()
 676 {
 677     if (m_status != Connected)
 678         return;
 679
 680     if (m_clipboard->ownsClipboard() || m_dontSendClipboard)
 681         return;
 682
 683     const QString text = m_clipboard->text(QClipboard::Clipboard);
 684
 685     vncThread.clientCut(text);
 686 }
 687
 688 //fake key events
 689 void VncView::sendKey(Qt::Key key)
 690 {
 691         //convert Qt::Key into x11 keysym
 692         int k = 0;
 693         switch(key) {
 694         case Qt::Key_Escape:
 695                 k = 0xff1b;
 696                 break;
 697         case Qt::Key_Tab:
 698                 k = 0xff09;
 699                 break;
 700         case Qt::Key_PageUp:
 701                 k = 0xff55;
 702                 break;
 703         case Qt::Key_PageDown:
 704                 k = 0xff56;
 705                 break;
 706         case Qt::Key_Return:
 707                 k = 0xff0d;
 708                 break;
 709         case Qt::Key_Insert:
 710                 k = 0xff63;
 711                 break;
 712         case Qt::Key_Delete:
 713                 k = 0xffff;
 714                 break;
 715         case Qt::Key_Home:
 716                 k = 0xff50;
 717                 break;
 718         case Qt::Key_End:
 719                 k = 0xff57;
 720                 break;
 721         case Qt::Key_Backspace:
 722                 k = 0xff08;
 723                 break;
 724         case Qt::Key_F1:
 725         case Qt::Key_F2:
 726         case Qt::Key_F3:
 727         case Qt::Key_F4:
 728         case Qt::Key_F5:
 729         case Qt::Key_F6:
 730         case Qt::Key_F7:
 731         case Qt::Key_F8:
 732         case Qt::Key_F9:
 733         case Qt::Key_F10:
 734         case Qt::Key_F11:
 735         case Qt::Key_F12:
 736                 k = 0xffbe + int(key - Qt::Key_F1);
 737                 break;
 738         case Qt::Key_Pause:
 739                 k = 0xff13;
 740                 break;
 741         case Qt::Key_Print:
 742                 k = 0xff61;
 743                 break;
 744         case Qt::Key_Menu:
 745                 k = 0xff67;
 746                 break;
 747         case Qt::Key_Meta:
 748         case Qt::MetaModifier:
 749                 k = XK_Super_L;
 750                 break;
 751         case Qt::Key_Alt:
 752         case Qt::AltModifier:
 753                 k = XK_Alt_L;
 754                 break;
 755         case Qt::Key_Control:
 756         case Qt::ControlModifier:
 757                 k = XK_Control_L;
 758                 break;
 759         default:
 760                 kDebug(5011) << "sendKey(): Unhandled Qt::Key value " << key;
 761                 return;
 762         }
 763
 764         if (k == XK_Shift_L || k == XK_Control_L || k == XK_Meta_L || k == XK_Alt_L || k == XK_Super_L) {
 765                 if (m_mods.contains(k)) { //release
 766                         m_mods.remove(k);
 767                         vncThread.keyEvent(k, false);
 768                 } else { //press
 769                         m_mods[k] = true;
 770                         vncThread.keyEvent(k, true);
 771                 }
 772         } else { //normal key
 773                 vncThread.keyEvent(k, true);
 774                 vncThread.keyEvent(k, false);
 775         }
 776 }
 777
 778 void VncView::sendKeySequence(QKeySequence keys)
 779 {
 780         Q_ASSERT(keys.count() <= 1); //we can only handle a single combination
 781
 782         //to get at individual key presses, we split 'keys' into its components
 783         QList<int> key_list;
 784         int pos = 0;
 785         while(true) {
 786                 QString k = keys.toString().section('+', pos, pos);
 787                 if(k.isEmpty())
 788                         break;
 789
 790                 //kDebug(5011) << "found key: " << k;
 791                 if(k == "Alt") {
 792                         key_list.append(Qt::Key_Alt);
 793                 } else if(k == "Ctrl") {
 794                         key_list.append(Qt::Key_Control);
 795                 } else if(k == "Meta") {
 796                         key_list.append(Qt::Key_Meta);
 797                 } else {
 798                         key_list.append(QKeySequence(k)[0]);
 799                 }
 800
 801                 pos++;
 802         }
 803
 804         for(int i = 0; i < key_list.count(); i++)
 805                 sendKey(Qt::Key(key_list.at(i)));
 806
 807         //release modifiers (everything before final key)
 808         for(int i = key_list.count()-2; i >= 0; i--)
 809                 sendKey(Qt::Key(key_list.at(i)));
 810 }
 811
 812 void VncView::reloadSettings()
 813 {
 814         QSettings settings;
 815         left_zoom = settings.value("left_zoom", 0).toInt();
 816         right_zoom = settings.value("right_zoom", 1).toInt();
 817         disable_tapping = settings.value("disable_tapping", false).toBool();
 818
 819         bool always_show_local_cursor = settings.value("always_show_local_cursor", false).toBool();
 820         if(always_show_local_cursor)
 821                 showDotCursor(CursorOn);
 822
 823         enableScaling(true);
 824 }
 825
 826 //convert commitString into keyevents
 827 void VncView::inputMethodEvent(QInputMethodEvent *event)
 828 {
 829         //TODO handle replacements
 830         //NOTE for the return key to work Qt needs to enable multiline input, which only works for Q(Plain)TextEdit
 831
 832         //kDebug(5011) << event->commitString() << "|" << event->preeditString() << "|" << event->replacementLength() << "|" << event->replacementStart();
 833         QString letters = event->commitString();
 834         for(int i = 0; i < letters.length(); i++) {
 835                 char k = letters.at(i).toLatin1();
 836                 if(!k) {
 837                         kDebug(5011) << "unhandled key";
 838                         continue;
 839                 }
 840                 vncThread.keyEvent(k, true);
 841                 vncThread.keyEvent(k, false);
 842         }
 843 }
 844
 845 void VncView::useFastTransformations(bool enabled)
 846 {
 847         if(enabled or zoomFactor() >= 1.0) {
 848                 transformation_mode = Qt::FastTransformation;
 849         } else {
 850                 transformation_mode = Qt::SmoothTransformation;
 851                 update();
 852         }
 853 }