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 //for mouse button masks
  27 #include "rfb/rfbproto.h"
  28
  29 #include <QtGui>
  30
  31
  32 // Definition of key modifier mask constants
  33 #define KMOD_Alt_R      0x01
  34 #define KMOD_Alt_L      0x02
  35 #define KMOD_Meta_L     0x04
  36 #define KMOD_Control_L  0x08
  37 #define KMOD_Shift_L    0x10
  38
  39 //local cursor width/height in px, should be an odd number
  40 const int CURSOR_SIZE = 7;
  41
  42 //in miliseconds
  43 const int TAP_PRESS_TIME = 180;
  44 const int DOUBLE_TAP_UP_TIME = 500;
  45
  46
  47 VncView::VncView(QWidget *parent, const KUrl &url, RemoteView::Quality quality, int listen_port)
  48         : RemoteView(parent),
  49         m_initDone(false),
  50         m_buttonMask(0),
  51                                 cursor_x(0),
  52                                 cursor_y(0),
  53         m_quitFlag(false),
  54         m_firstPasswordTry(true),
  55         m_dontSendClipboard(false),
  56         m_horizontalFactor(1.0),
  57         m_verticalFactor(1.0),
  58         m_forceLocalCursor(false),
  59                                 quality(quality),
  60                                 listen_port(listen_port),
  61                                 transformation_mode(Qt::FastTransformation),
  62                                 display_off(false)
  63 {
  64     m_url = url;
  65     m_host = url.host();
  66     m_port = url.port();
  67
  68         //BlockingQueuedConnection can cause deadlocks when exiting, handled in startQuitting()
  69     connect(&vncThread, SIGNAL(imageUpdated(int, int, int, int)), this, SLOT(updateImage(int, int, int, int)), Qt::BlockingQueuedConnection);
  70     connect(&vncThread, SIGNAL(gotCut(const QString&)), this, SLOT(setCut(const QString&)), Qt::BlockingQueuedConnection);
  71     connect(&vncThread, SIGNAL(passwordRequest()), this, SLOT(requestPassword()), Qt::BlockingQueuedConnection);
  72     connect(&vncThread, SIGNAL(outputErrorMessage(QString)), this, SLOT(outputErrorMessage(QString)));
  73
  74         //don't miss early connection failures
  75         connect(&vncThread, SIGNAL(finished()), this, SLOT(startQuitting()));
  76
  77     m_clipboard = QApplication::clipboard();
  78     connect(m_clipboard, SIGNAL(selectionChanged()), this, SLOT(clipboardSelectionChanged()));
  79     connect(m_clipboard, SIGNAL(dataChanged()), this, SLOT(clipboardDataChanged()));
  80
  81     reloadSettings();
  82 }
  83
  84 VncView::~VncView()
  85 {
  86     unpressModifiers();
  87
  88     // Disconnect all signals so that we don't get any more callbacks from the client thread
  89     vncThread.disconnect();
  90
  91     startQuitting();
  92 }
  93
  94 bool VncView::eventFilter(QObject *obj, QEvent *event)
  95 {
  96     if (m_viewOnly) {
  97         if (event->type() == QEvent::KeyPress ||
  98                 event->type() == QEvent::KeyRelease ||
  99                 event->type() == QEvent::MouseButtonDblClick ||
 100                 event->type() == QEvent::MouseButtonPress ||
 101                 event->type() == QEvent::MouseButtonRelease ||
 102                 event->type() == QEvent::Wheel ||
 103                 event->type() == QEvent::MouseMove) {
 104
 105                         event->ignore();
 106             return true;
 107                 }
 108     }
 109
 110     return RemoteView::eventFilter(obj, event);
 111 }
 112
 113 QSize VncView::framebufferSize()
 114 {
 115     return m_frame.size();
 116 }
 117
 118 QSize VncView::sizeHint() const
 119 {
 120     return size();
 121 }
 122
 123 QSize VncView::minimumSizeHint() const
 124 {
 125     return size();
 126 }
 127
 128 void VncView::startQuitting()
 129 {
 130         if(isQuitting())
 131                 return;
 132
 133     kDebug(5011) << "about to quit";
 134
 135     setStatus(Disconnecting);
 136
 137     m_quitFlag = true;
 138
 139         vncThread.stop();
 140
 141     const bool quitSuccess = vncThread.wait(700);
 142         if(!quitSuccess) {
 143                 //happens when vncThread wants to call a slot via BlockingQueuedConnection,
 144                 //needs an event loop in this thread so execution continues after 'emit'
 145                 QEventLoop loop;
 146                 if(!loop.processEvents())
 147                         kDebug(5011) << "BUG: deadlocked, but no events to deliver?";
 148                 vncThread.wait(700);
 149         }
 150     setStatus(Disconnected);
 151 }
 152
 153 bool VncView::isQuitting()
 154 {
 155     return m_quitFlag;
 156 }
 157
 158 bool VncView::start()
 159 {
 160     vncThread.setHost(m_host);
 161     vncThread.setPort(m_port);
 162         vncThread.setListenPort(listen_port); //if port is != 0, thread will listen for connections
 163     vncThread.setQuality(quality);
 164
 165     // set local cursor on by default because low quality mostly means slow internet connection
 166     if (quality == RemoteView::Low) {
 167         showDotCursor(RemoteView::CursorOn);
 168     }
 169
 170     setStatus(Connecting);
 171
 172     vncThread.start();
 173     return true;
 174 }
 175
 176 bool VncView::supportsScaling() const
 177 {
 178     return true;
 179 }
 180
 181 bool VncView::supportsLocalCursor() const
 182 {
 183     return true;
 184 }
 185
 186 void VncView::requestPassword()
 187 {
 188     kDebug(5011) << "request password";
 189
 190     setStatus(Authenticating);
 191
 192     if (!m_url.password().isNull()) {
 193         vncThread.setPassword(m_url.password());
 194         return;
 195     }
 196
 197         QSettings settings;
 198         settings.beginGroup("hosts");
 199
 200         //check for saved password
 201         QString password = settings.value(QString("%1/password").arg(m_host), "").toString();
 202         if(m_firstPasswordTry and !password.isEmpty()) {
 203                 kDebug(5011) << "Trying saved password";
 204                 m_firstPasswordTry = false;
 205                 vncThread.setPassword(password);
 206                 return;
 207         }
 208         m_firstPasswordTry = false;
 209
 210         //build dialog
 211         QDialog dialog(this);
 212         dialog.setWindowTitle(tr("Password required"));
 213
 214         QLineEdit passwordbox;
 215         passwordbox.setEchoMode(QLineEdit::Password);
 216         passwordbox.setText(password);
 217         QCheckBox save_password(tr("Save Password"));
 218         save_password.setChecked(!password.isEmpty()); //offer to overwrite saved password
 219         QPushButton ok_button(tr("Done"));
 220         ok_button.setMaximumWidth(100);
 221         connect(&ok_button, SIGNAL(clicked()),
 222                 &dialog, SLOT(accept()));
 223
 224         QHBoxLayout layout1;
 225         QVBoxLayout layout2;
 226         layout2.addWidget(&passwordbox);
 227         if(!m_host.isEmpty()) //don't save incoming connections
 228                 layout2.addWidget(&save_password);
 229         layout1.addLayout(&layout2);
 230         layout1.addWidget(&ok_button);
 231         dialog.setLayout(&layout1);
 232
 233         if(dialog.exec()) { //dialog accepted
 234                 password = passwordbox.text();
 235
 236                 if(!m_host.isEmpty() and save_password.isChecked()) {
 237                         kDebug(5011) << "Saving password for host '" << m_host << "'";
 238
 239                         settings.setValue(QString("%1/password").arg(m_host), password);
 240                         settings.sync();
 241                 }
 242
 243                 vncThread.setPassword(password);
 244         } else {
 245                 vncThread.setPassword(QString()); //null string to exit
 246         }
 247 }
 248
 249 void VncView::outputErrorMessage(const QString &message)
 250 {
 251     if (message == "INTERNAL:APPLE_VNC_COMPATIBILTY") {
 252         setCursor(localDotCursor());
 253         m_forceLocalCursor = true;
 254         return;
 255     }
 256
 257     startQuitting();
 258
 259     emit errorMessage(i18n("VNC failure"), message);
 260 }
 261
 262 void VncView::updateImage(int x, int y, int w, int h)
 263 {
 264         //don't update if window is out of focus / display is off
 265         if(!QApplication::focusWidget() || display_off) {
 266                 return;
 267         }
 268
 269      //kDebug(5011) << "got update" << width() << height();
 270
 271     m_x = x;
 272     m_y = y;
 273     m_w = w;
 274     m_h = h;
 275
 276     if (m_horizontalFactor != 1.0 || m_verticalFactor != 1.0) {
 277         // If the view is scaled, grow the update rectangle to avoid artifacts
 278         int x_extrapixels = 1.0/m_horizontalFactor + 1;
 279         int y_extrapixels = 1.0/m_verticalFactor + 1;
 280
 281         m_x-=x_extrapixels;
 282         m_y-=y_extrapixels;
 283         m_w+=2*x_extrapixels;
 284         m_h+=2*y_extrapixels;
 285     }
 286
 287     m_frame = vncThread.image();
 288
 289     if (!m_initDone) { //TODO this seems an odd place for initialization
 290         setAttribute(Qt::WA_StaticContents);
 291         setAttribute(Qt::WA_OpaquePaintEvent);
 292         installEventFilter(this);
 293
 294         setCursor(((m_dotCursorState == CursorOn) || m_forceLocalCursor) ? localDotCursor() : Qt::BlankCursor);
 295
 296         setMouseTracking(true); // get mouse events even when there is no mousebutton pressed
 297         setFocusPolicy(Qt::WheelFocus);
 298         setStatus(Connected);
 299         emit connected();
 300
 301                 resize(width(), height());
 302
 303         m_initDone = true;
 304
 305     }
 306
 307         static QSize old_frame_size = QSize();
 308     if ((y == 0 && x == 0) && (m_frame.size() != old_frame_size)) {
 309             old_frame_size = m_frame.size();
 310         kDebug(5011) << "Updating framebuffer size";
 311                 setZoomLevel();
 312                 useFastTransformations(false);
 313
 314         emit framebufferSizeChanged(m_frame.width(), m_frame.height());
 315     }
 316
 317     repaint(qRound(m_x * m_horizontalFactor), qRound(m_y * m_verticalFactor), qRound(m_w * m_horizontalFactor), qRound(m_h * m_verticalFactor));
 318 }
 319
 320 void VncView::setViewOnly(bool viewOnly)
 321 {
 322     RemoteView::setViewOnly(viewOnly);
 323
 324     m_dontSendClipboard = viewOnly;
 325
 326     if (viewOnly) {
 327                 showDotCursor(CursorOff);
 328         setCursor(Qt::ArrowCursor);
 329     } else {
 330         setCursor(m_dotCursorState == CursorOn ? localDotCursor() : Qt::BlankCursor);
 331         }
 332 }
 333
 334 void VncView::showDotCursor(DotCursorState state)
 335 {
 336     RemoteView::showDotCursor(state);
 337
 338     setCursor(state == CursorOn ? localDotCursor() : Qt::BlankCursor);
 339 }
 340
 341 //level should be in [0, 100]
 342 void VncView::setZoomLevel(int level)
 343 {
 344         Q_ASSERT(parentWidget() != 0);
 345
 346         if(level == -1) { //handle resize
 347                 resize(m_frame.width()*m_horizontalFactor, m_frame.height()*m_verticalFactor);
 348                 return;
 349         }
 350
 351         double magnification;
 352         if(level == 100) {
 353                 magnification = 2.0;
 354         } else if(level >= 90) {
 355                 magnification = 1.0;
 356         } else {
 357                 const double min_horiz_magnification = double(parentWidget()->width())/m_frame.width();
 358                 const double min_vert_magnification = double(parentWidget()->height())/m_frame.height();
 359                 const double fit_screen_magnification = qMin(min_horiz_magnification, min_vert_magnification);
 360
 361                 //level=90 => magnification=1.0, level=0 => magnification=fit_screen_magnification
 362                 magnification = (level)/90.0*(1.0 - fit_screen_magnification) + fit_screen_magnification;
 363         }
 364
 365         if(magnification < 0                    //remote display smaller than local?
 366         or magnification != magnification)      //nan
 367                 magnification = 1.0;
 368
 369         m_verticalFactor = m_horizontalFactor = magnification;
 370         resize(m_frame.width()*magnification, m_frame.height()*magnification);
 371 }
 372
 373 void VncView::setCut(const QString &text)
 374 {
 375     m_dontSendClipboard = true;
 376     m_clipboard->setText(text, QClipboard::Clipboard);
 377     m_clipboard->setText(text, QClipboard::Selection);
 378     m_dontSendClipboard = false;
 379 }
 380
 381 void VncView::paintEvent(QPaintEvent *event)
 382 {
 383     if (m_frame.isNull() || m_frame.format() == QImage::Format_Invalid) {
 384         //no valid image to paint
 385         RemoteView::paintEvent(event);
 386         return;
 387     }
 388
 389     event->accept();
 390
 391         const QRect update_rect = event->rect();
 392     QPainter painter(this);
 393         if (update_rect != rect()) {
 394                 // kDebug(5011) << "Partial repaint";
 395                 const int sx = qRound(update_rect.x()/m_horizontalFactor);
 396                 const int sy = qRound(update_rect.y()/m_verticalFactor);
 397                 const int sw = qRound(update_rect.width()/m_horizontalFactor);
 398                 const int sh = qRound(update_rect.height()/m_verticalFactor);
 399
 400                 painter.drawImage(update_rect,
 401                           m_frame.copy(sx, sy, sw, sh)
 402                           .scaled(update_rect.size(), Qt::IgnoreAspectRatio, transformation_mode));
 403         } else {
 404                 //kDebug(5011) << "Full repaint" << width() << height() << m_frame.width() << m_frame.height();
 405
 406                 painter.drawImage(rect(),
 407                         m_frame.scaled(size(), Qt::IgnoreAspectRatio, transformation_mode));
 408     }
 409
 410         //draw local cursor ourselves, normal mouse pointer doesn't deal with scrolling
 411         if((m_dotCursorState == CursorOn) || m_forceLocalCursor) {
 412 #if QT_VERSION >= 0x040500
 413                 painter.setCompositionMode(QPainter::RasterOp_SourceXorDestination);
 414 #endif
 415                 //rectangle size includes 1px pen width
 416                 painter.drawRect(cursor_x*m_horizontalFactor - CURSOR_SIZE/2, cursor_y*m_verticalFactor - CURSOR_SIZE/2, CURSOR_SIZE-1, CURSOR_SIZE-1);
 417         }
 418
 419     RemoteView::paintEvent(event);
 420 }
 421
 422 void VncView::resizeEvent(QResizeEvent *event)
 423 {
 424     RemoteView::resizeEvent(event);
 425     update();
 426 }
 427
 428 bool VncView::event(QEvent *event)
 429 {
 430         switch (event->type()) {
 431         case QEvent::KeyPress:
 432         case QEvent::KeyRelease:
 433                 keyEventHandler(static_cast<QKeyEvent*>(event));
 434                 return true;
 435
 436         case QEvent::MouseButtonDblClick:
 437         case QEvent::MouseButtonPress:
 438         case QEvent::MouseButtonRelease:
 439         case QEvent::MouseMove:
 440                 mouseEventHandler(static_cast<QMouseEvent*>(event));
 441                 return true;
 442
 443         case QEvent::Wheel:
 444                 wheelEventHandler(static_cast<QWheelEvent*>(event));
 445                 return true;
 446
 447         case QEvent::WindowActivate: //input panel may have been closed, prevent IM from interfering with hardware keyboard
 448                 setAttribute(Qt::WA_InputMethodEnabled, false);
 449                 //fall through
 450         default:
 451                 return RemoteView::event(event);
 452         }
 453 }
 454
 455 //call with e == 0 to flush held events
 456 void VncView::mouseEventHandler(QMouseEvent *e)
 457 {
 458         static bool tap_detected = false;
 459         static bool double_tap_detected = false;
 460         static bool tap_drag_detected = false;
 461         static QTime press_time;
 462         static QTime up_time; //used for double clicks/tap&drag, for time after first tap
 463
 464
 465         if(!e) { //flush held taps
 466                 if(tap_detected) {
 467                         m_buttonMask |= rfbButton1Mask;
 468                         vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 469                         m_buttonMask &= ~rfbButton1Mask;
 470                         vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 471                         tap_detected = false;
 472                 } else if(double_tap_detected and press_time.elapsed() > TAP_PRESS_TIME) { //got tap + another press -> tap & drag
 473                         m_buttonMask |= rfbButton1Mask;
 474                         vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 475                         double_tap_detected = false;
 476                         tap_drag_detected = true;
 477                 }
 478
 479                 return;
 480         }
 481
 482         if(e->x() < 0 or e->y() < 0) { //QScrollArea tends to send invalid events sometimes...
 483                 e->ignore();
 484                 return;
 485         }
 486
 487         cursor_x = qRound(e->x()/m_horizontalFactor);
 488         cursor_y = qRound(e->y()/m_verticalFactor);
 489         vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask); // plain move event
 490
 491         if(!disable_tapping and e->button() == Qt::LeftButton) { //implement touchpad-like input for left button
 492                 if(e->type() == QEvent::MouseButtonPress or e->type() == QEvent::MouseButtonDblClick) {
 493                         press_time.start();
 494                         if(tap_detected and up_time.elapsed() < DOUBLE_TAP_UP_TIME) {
 495                                 tap_detected = false;
 496                                 double_tap_detected = true;
 497
 498                                 QTimer::singleShot(TAP_PRESS_TIME, this, SLOT(mouseEventHandler()));
 499                         }
 500                 } else if(e->type() == QEvent::MouseButtonRelease) {
 501                         if(tap_drag_detected) { //end tap & drag
 502                                 m_buttonMask &= ~rfbButton1Mask;
 503                                 vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 504                                 tap_drag_detected = false;
 505                         } else if(double_tap_detected) { //double click
 506                                 double_tap_detected = false;
 507
 508                                 m_buttonMask |= rfbButton1Mask;
 509                                 vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 510                                 m_buttonMask &= ~rfbButton1Mask;
 511                                 vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 512                                 m_buttonMask |= rfbButton1Mask;
 513                                 vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 514                                 m_buttonMask &= ~rfbButton1Mask;
 515                                 vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 516                         } else if(press_time.elapsed() < TAP_PRESS_TIME) { //tap
 517                                 up_time.start();
 518                                 tap_detected = true;
 519                                 QTimer::singleShot(DOUBLE_TAP_UP_TIME, this, SLOT(mouseEventHandler()));
 520                         }
 521
 522                 }
 523         } else { //middle or right button, send directly
 524                 if ((e->type() == QEvent::MouseButtonPress)) {
 525                     if (e->button() & Qt::MidButton)
 526                                 m_buttonMask |= rfbButton2Mask;
 527                     if (e->button() & Qt::RightButton)
 528                                 m_buttonMask |= rfbButton3Mask;
 529                 } else if (e->type() == QEvent::MouseButtonRelease) {
 530                     if (e->button() & Qt::MidButton)
 531                                 m_buttonMask &= ~rfbButton2Mask;
 532                     if (e->button() & Qt::RightButton)
 533                                 m_buttonMask &= ~rfbButton3Mask;
 534                 }
 535                 vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 536         }
 537
 538         //prevent local cursor artifacts
 539         static int old_cursor_x = cursor_x;
 540         static int old_cursor_y = cursor_y;
 541         if(((m_dotCursorState == CursorOn) || m_forceLocalCursor)
 542         and (cursor_x != old_cursor_x or cursor_y != old_cursor_y)) {
 543                 //clear last position
 544                 repaint(old_cursor_x*m_horizontalFactor - CURSOR_SIZE/2, old_cursor_y*m_verticalFactor - CURSOR_SIZE/2, CURSOR_SIZE, CURSOR_SIZE);
 545                 //and refresh new one
 546                 repaint(cursor_x*m_horizontalFactor - CURSOR_SIZE/2, cursor_y*m_verticalFactor - CURSOR_SIZE/2, CURSOR_SIZE, CURSOR_SIZE);
 547
 548                 old_cursor_x = cursor_x; old_cursor_y = cursor_y;
 549         }
 550 }
 551
 552 void VncView::wheelEventHandler(QWheelEvent *event)
 553 {
 554     int eb = 0;
 555     if (event->delta() < 0)
 556         eb |= rfbWheelDownMask;
 557     else
 558         eb |= rfbWheelUpMask;
 559
 560     const int x = qRound(event->x() / m_horizontalFactor);
 561     const int y = qRound(event->y() / m_verticalFactor);
 562
 563     vncThread.mouseEvent(x, y, m_buttonMask | eb);
 564     vncThread.mouseEvent(x, y, m_buttonMask);
 565 }
 566
 567 void VncView::keyEventHandler(QKeyEvent *e)
 568 {
 569     // strip away autorepeating KeyRelease; see bug #206598
 570     if (e->isAutoRepeat() && (e->type() == QEvent::KeyRelease)) {
 571         return;
 572     }
 573
 574 // parts of this code are based on http://italc.sourcearchive.com/documentation/1.0.9.1/vncview_8cpp-source.html
 575     rfbKeySym k = e->nativeVirtualKey();
 576
 577     // we do not handle Key_Backtab separately as the Shift-modifier
 578     // is already enabled
 579     if (e->key() == Qt::Key_Backtab) {
 580         k = XK_Tab;
 581     }
 582
 583     const bool pressed = (e->type() == QEvent::KeyPress);
 584
 585 #ifdef Q_WS_MAEMO_5
 586     //don't send ISO_Level3_Shift (would break things like Win+0-9)
 587     //also enable IM so symbol key works
 588     if(k == 0xfe03) {
 589             setAttribute(Qt::WA_InputMethodEnabled, pressed);
 590             e->ignore();
 591             return;
 592     }
 593 #endif
 594
 595     // handle modifiers
 596     if (k == XK_Shift_L || k == XK_Control_L || k == XK_Meta_L || k == XK_Alt_L) {
 597         if (pressed) {
 598             m_mods[k] = true;
 599         } else if (m_mods.contains(k)) {
 600             m_mods.remove(k);
 601         } else {
 602             unpressModifiers();
 603         }
 604     }
 605
 606
 607         int current_zoom = -1;
 608         if(e->key() == Qt::Key_F8)
 609                 current_zoom = left_zoom;
 610         else if(e->key() == Qt::Key_F7)
 611                 current_zoom = right_zoom;
 612         else if (k) {
 613                 // kDebug(5011) << "got '" << e->text() << "'.";
 614                 vncThread.keyEvent(k, pressed);
 615         } else {
 616                 kDebug(5011) << "nativeVirtualKey() for '" << e->text() << "' failed.";
 617                 return;
 618         }
 619
 620         if(current_zoom == -1)
 621                 return;
 622
 623         //handle zoom buttons
 624         if(current_zoom == 0) { //left click
 625                 if(pressed)
 626                         m_buttonMask |= rfbButton1Mask;
 627                 else
 628                         m_buttonMask &= ~rfbButton1Mask;
 629                 vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 630         } else if(current_zoom == 1) { //right click
 631                 if(pressed)
 632                         m_buttonMask |= rfbButton3Mask;
 633                 else
 634                         m_buttonMask &= ~rfbButton3Mask;
 635                 vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 636         } else if(current_zoom == 2) { //middle click
 637                 if(pressed)
 638                         m_buttonMask |= rfbButton2Mask;
 639                 else
 640                         m_buttonMask &= ~rfbButton2Mask;
 641                 vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 642         } else if(current_zoom == 3 and pressed) { //wheel up
 643                 vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask | rfbWheelUpMask);
 644                 vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 645         } else if(current_zoom == 4 and pressed) { //wheel down
 646                 vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask | rfbWheelDownMask);
 647                 vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 648         } else if(current_zoom == 5) { //page up
 649                 vncThread.keyEvent(0xff55, pressed);
 650         } else if(current_zoom == 6) { //page down
 651                 vncThread.keyEvent(0xff56, pressed);
 652         }
 653 }
 654
 655 void VncView::unpressModifiers()
 656 {
 657     const QList<unsigned int> keys = m_mods.keys();
 658     QList<unsigned int>::const_iterator it = keys.constBegin();
 659     while (it != keys.end()) {
 660         vncThread.keyEvent(*it, false);
 661         it++;
 662     }
 663     m_mods.clear();
 664 }
 665
 666 void VncView::clipboardSelectionChanged()
 667 {
 668     if (m_status != Connected)
 669         return;
 670
 671     if (m_clipboard->ownsSelection() || m_dontSendClipboard)
 672         return;
 673
 674     const QString text = m_clipboard->text(QClipboard::Selection);
 675
 676     vncThread.clientCut(text);
 677 }
 678
 679 void VncView::clipboardDataChanged()
 680 {
 681     if (m_status != Connected)
 682         return;
 683
 684     if (m_clipboard->ownsClipboard() || m_dontSendClipboard)
 685         return;
 686
 687     const QString text = m_clipboard->text(QClipboard::Clipboard);
 688
 689     vncThread.clientCut(text);
 690 }
 691
 692 //fake key events
 693 void VncView::sendKey(Qt::Key key)
 694 {
 695         //convert Qt::Key into x11 keysym
 696         int k = 0;
 697         switch(key) {
 698         case Qt::Key_Escape:
 699                 k = 0xff1b;
 700                 break;
 701         case Qt::Key_Tab:
 702                 k = 0xff09;
 703                 break;
 704         case Qt::Key_PageUp:
 705                 k = 0xff55;
 706                 break;
 707         case Qt::Key_PageDown:
 708                 k = 0xff56;
 709                 break;
 710         case Qt::Key_Return:
 711                 k = 0xff0d;
 712                 break;
 713         case Qt::Key_Insert:
 714                 k = 0xff63;
 715                 break;
 716         case Qt::Key_Delete:
 717                 k = 0xffff;
 718                 break;
 719         case Qt::Key_Home:
 720                 k = 0xff50;
 721                 break;
 722         case Qt::Key_End:
 723                 k = 0xff57;
 724                 break;
 725         case Qt::Key_Backspace:
 726                 k = 0xff08;
 727                 break;
 728         case Qt::Key_F1:
 729         case Qt::Key_F2:
 730         case Qt::Key_F3:
 731         case Qt::Key_F4:
 732         case Qt::Key_F5:
 733         case Qt::Key_F6:
 734         case Qt::Key_F7:
 735         case Qt::Key_F8:
 736         case Qt::Key_F9:
 737         case Qt::Key_F10:
 738         case Qt::Key_F11:
 739         case Qt::Key_F12:
 740                 k = 0xffbe + int(key - Qt::Key_F1);
 741                 break;
 742         case Qt::Key_Pause:
 743                 k = 0xff13;
 744                 break;
 745         case Qt::Key_Print:
 746                 k = 0xff61;
 747                 break;
 748         case Qt::Key_Menu:
 749                 k = 0xff67;
 750                 break;
 751         case Qt::Key_Meta:
 752         case Qt::MetaModifier:
 753                 k = XK_Super_L;
 754                 break;
 755         case Qt::Key_Alt:
 756         case Qt::AltModifier:
 757                 k = XK_Alt_L;
 758                 break;
 759         case Qt::Key_Control:
 760         case Qt::ControlModifier:
 761                 k = XK_Control_L;
 762                 break;
 763         default:
 764                 kDebug(5011) << "sendKey(): Unhandled Qt::Key value " << key;
 765                 return;
 766         }
 767
 768         if (k == XK_Shift_L || k == XK_Control_L || k == XK_Meta_L || k == XK_Alt_L || k == XK_Super_L) {
 769                 if (m_mods.contains(k)) { //release
 770                         m_mods.remove(k);
 771                         vncThread.keyEvent(k, false);
 772                 } else { //press
 773                         m_mods[k] = true;
 774                         vncThread.keyEvent(k, true);
 775                 }
 776         } else { //normal key
 777                 vncThread.keyEvent(k, true);
 778                 vncThread.keyEvent(k, false);
 779         }
 780 }
 781
 782 void VncView::sendKeySequence(QKeySequence keys)
 783 {
 784         Q_ASSERT(keys.count() <= 1); //we can only handle a single combination
 785
 786         //to get at individual key presses, we split 'keys' into its components
 787         QList<int> key_list;
 788         int pos = 0;
 789         while(true) {
 790                 QString k = keys.toString().section('+', pos, pos);
 791                 if(k.isEmpty())
 792                         break;
 793
 794                 //kDebug(5011) << "found key: " << k;
 795                 if(k == "Alt") {
 796                         key_list.append(Qt::Key_Alt);
 797                 } else if(k == "Ctrl") {
 798                         key_list.append(Qt::Key_Control);
 799                 } else if(k == "Meta") {
 800                         key_list.append(Qt::Key_Meta);
 801                 } else {
 802                         key_list.append(QKeySequence(k)[0]);
 803                 }
 804
 805                 pos++;
 806         }
 807
 808         for(int i = 0; i < key_list.count(); i++)
 809                 sendKey(Qt::Key(key_list.at(i)));
 810
 811         //release modifiers (everything before final key)
 812         for(int i = key_list.count()-2; i >= 0; i--)
 813                 sendKey(Qt::Key(key_list.at(i)));
 814 }
 815
 816 void VncView::reloadSettings()
 817 {
 818         QSettings settings;
 819         left_zoom = settings.value("left_zoom", 0).toInt();
 820         right_zoom = settings.value("right_zoom", 1).toInt();
 821         disable_tapping = settings.value("disable_tapping", false).toBool();
 822
 823         bool always_show_local_cursor = settings.value("always_show_local_cursor", false).toBool();
 824         if(always_show_local_cursor)
 825                 showDotCursor(CursorOn);
 826
 827         enableScaling(true);
 828 }
 829
 830 //convert commitString into keyevents
 831 void VncView::inputMethodEvent(QInputMethodEvent *event)
 832 {
 833         //TODO handle replacements
 834         //NOTE for the return key to work Qt needs to enable multiline input, which only works for Q(Plain)TextEdit
 835
 836         //kDebug(5011) << event->commitString() << "|" << event->preeditString() << "|" << event->replacementLength() << "|" << event->replacementStart();
 837         QString letters = event->commitString();
 838         for(int i = 0; i < letters.length(); i++) {
 839                 char k = letters.at(i).toLatin1();
 840                 if(!k) {
 841                         kDebug(5011) << "unhandled key";
 842                         continue;
 843                 }
 844                 vncThread.keyEvent(k, true);
 845                 vncThread.keyEvent(k, false);
 846         }
 847 }
 848
 849 void VncView::useFastTransformations(bool enabled)
 850 {
 851         if(enabled or zoomFactor() >= 1.0) {
 852                 transformation_mode = Qt::FastTransformation;
 853         } else {
 854                 transformation_mode = Qt::SmoothTransformation;
 855                 update();
 856         }
 857 }