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 <QMessageBox>
  27 #include <QInputDialog>
  28 #define KMessageBox QMessageBox
  29 #define error(parent, message, caption) \
  30 critical(parent, caption, message)
  31
  32 #include <QApplication>
  33 #include <QBitmap>
  34 #include <QCheckBox>
  35 #include <QDialog>
  36 #include <QImage>
  37 #include <QHBoxLayout>
  38 #include <QVBoxLayout>
  39 #include <QPainter>
  40 #include <QMouseEvent>
  41 #include <QPushButton>
  42 #include <QEvent>
  43 #include <QSettings>
  44 #include <QTime>
  45 #include <QTimer>
  46
  47
  48 // Definition of key modifier mask constants
  49 #define KMOD_Alt_R      0x01
  50 #define KMOD_Alt_L      0x02
  51 #define KMOD_Meta_L     0x04
  52 #define KMOD_Control_L  0x08
  53 #define KMOD_Shift_L    0x10
  54
  55 VncView::VncView(QWidget *parent, const KUrl &url, RemoteView::Quality quality)
  56         : RemoteView(parent),
  57         m_initDone(false),
  58         m_buttonMask(0),
  59         cursor_x(0),
  60         cursor_y(0),
  61         m_repaint(false),
  62         m_quitFlag(false),
  63         m_firstPasswordTry(true),
  64         m_dontSendClipboard(false),
  65         m_horizontalFactor(1.0),
  66         m_verticalFactor(1.0),
  67         m_forceLocalCursor(false),
  68         force_full_repaint(false),
  69         quality(quality)
  70 {
  71     m_url = url;
  72     m_host = url.host();
  73     m_port = url.port();
  74
  75     connect(&vncThread, SIGNAL(imageUpdated(int, int, int, int)), this, SLOT(updateImage(int, int, int, int)), Qt::BlockingQueuedConnection);
  76     connect(&vncThread, SIGNAL(gotCut(const QString&)), this, SLOT(setCut(const QString&)), Qt::BlockingQueuedConnection);
  77     connect(&vncThread, SIGNAL(passwordRequest()), this, SLOT(requestPassword()), Qt::BlockingQueuedConnection);
  78     connect(&vncThread, SIGNAL(outputErrorMessage(QString)), this, SLOT(outputErrorMessage(QString)));
  79
  80     m_clipboard = QApplication::clipboard();
  81     connect(m_clipboard, SIGNAL(selectionChanged()), this, SLOT(clipboardSelectionChanged()));
  82     connect(m_clipboard, SIGNAL(dataChanged()), this, SLOT(clipboardDataChanged()));
  83
  84     reloadSettings();
  85 }
  86
  87 VncView::~VncView()
  88 {
  89     unpressModifiers();
  90
  91     // Disconnect all signals so that we don't get any more callbacks from the client thread
  92     vncThread.disconnect();
  93
  94     startQuitting();
  95 }
  96
  97 void VncView::forceFullRepaint()
  98 {
  99         force_full_repaint = true;
 100         repaint();
 101 }
 102
 103 bool VncView::eventFilter(QObject *obj, QEvent *event)
 104 {
 105     if (m_viewOnly) {
 106         if (event->type() == QEvent::KeyPress ||
 107                 event->type() == QEvent::KeyRelease ||
 108                 event->type() == QEvent::MouseButtonDblClick ||
 109                 event->type() == QEvent::MouseButtonPress ||
 110                 event->type() == QEvent::MouseButtonRelease ||
 111                 event->type() == QEvent::Wheel ||
 112                 event->type() == QEvent::MouseMove)
 113             return true;
 114     }
 115     return RemoteView::eventFilter(obj, event);
 116 }
 117
 118 QSize VncView::framebufferSize()
 119 {
 120     return m_frame.size();
 121 }
 122
 123 QSize VncView::sizeHint() const
 124 {
 125     return size();
 126 }
 127
 128 QSize VncView::minimumSizeHint() const
 129 {
 130     return size();
 131 }
 132
 133 void VncView::scaleResize(int w, int h)
 134 {
 135     RemoteView::scaleResize(w, h);
 136
 137     kDebug(5011) << "scaleResize(): " <<w << h;
 138     if (m_scale) {
 139         m_verticalFactor = (qreal) h / m_frame.height();
 140         m_horizontalFactor = (qreal) w / m_frame.width();
 141
 142         m_verticalFactor = m_horizontalFactor = qMin(m_verticalFactor, m_horizontalFactor);
 143
 144         const qreal newW = m_frame.width() * m_horizontalFactor;
 145         const qreal newH = m_frame.height() * m_verticalFactor;
 146         /*
 147         setMaximumSize(newW, newH); //This is a hack to force Qt to center the view in the scroll area
 148         //also causes the widget's size to flicker
 149         */
 150         resize(newW, newH);
 151     }
 152 }
 153
 154
 155 void VncView::startQuitting()
 156 {
 157     kDebug(5011) << "about to quit";
 158
 159     const bool connected = status() == RemoteView::Connected;
 160
 161     setStatus(Disconnecting);
 162
 163     m_quitFlag = true;
 164
 165     if (connected) {
 166         vncThread.stop();
 167     }
 168
 169     vncThread.quit();
 170
 171     const bool quitSuccess = vncThread.wait(500);
 172
 173     kDebug(5011) << "startQuitting(): Quit VNC thread success:" << quitSuccess;
 174
 175     setStatus(Disconnected);
 176 }
 177
 178 bool VncView::isQuitting()
 179 {
 180     return m_quitFlag;
 181 }
 182
 183 bool VncView::start()
 184 {
 185     vncThread.setHost(m_host);
 186     vncThread.setPort(m_port);
 187
 188     vncThread.setQuality(quality);
 189
 190     // set local cursor on by default because low quality mostly means slow internet connection
 191     if (quality == RemoteView::Low) {
 192         showDotCursor(RemoteView::CursorOn);
 193     }
 194
 195     setStatus(Connecting);
 196
 197     vncThread.start();
 198     return true;
 199 }
 200
 201 bool VncView::supportsScaling() const
 202 {
 203     return true;
 204 }
 205
 206 bool VncView::supportsLocalCursor() const
 207 {
 208     return true;
 209 }
 210
 211 void VncView::requestPassword()
 212 {
 213     kDebug(5011) << "request password";
 214
 215     setStatus(Authenticating);
 216
 217     if (!m_url.password().isNull()) {
 218         vncThread.setPassword(m_url.password());
 219         return;
 220     }
 221
 222         QSettings settings;
 223         settings.beginGroup("hosts");
 224         QString password = settings.value(QString("%1/password").arg(m_host), "").toString();
 225         //check for saved password
 226         if(m_firstPasswordTry and !password.isEmpty()) {
 227                 kDebug(5011) << "Trying saved password";
 228                 m_firstPasswordTry = false;
 229                 vncThread.setPassword(password);
 230                 return;
 231         }
 232         m_firstPasswordTry = false;
 233
 234         //build dialog
 235         QDialog dialog(this);
 236         dialog.setWindowTitle(tr("Password required"));
 237
 238         QLineEdit passwordbox;
 239         passwordbox.setEchoMode(QLineEdit::Password);
 240         passwordbox.setText(password);
 241         QCheckBox save_password(tr("Save Password"));
 242         save_password.setChecked(!password.isEmpty()); //offer to overwrite saved password
 243         QPushButton ok_button(tr("Done"));
 244         ok_button.setMaximumWidth(100);
 245         connect(&ok_button, SIGNAL(clicked()),
 246                 &dialog, SLOT(accept()));
 247
 248         QHBoxLayout layout1;
 249         QVBoxLayout layout2;
 250         layout2.addWidget(&passwordbox);
 251         layout2.addWidget(&save_password);
 252         layout1.addLayout(&layout2);
 253         layout1.addWidget(&ok_button);
 254         dialog.setLayout(&layout1);
 255
 256         if(dialog.exec()) { //dialog accepted
 257                 password = passwordbox.text();
 258
 259                 if(save_password.isChecked()) {
 260                         kDebug(5011) << "Saving password for host '" << m_host << "'";
 261
 262                         settings.setValue(QString("%1/password").arg(m_host), password);
 263                         settings.sync();
 264                 }
 265
 266                 vncThread.setPassword(password);
 267         } else {
 268                 startQuitting();
 269         }
 270 }
 271
 272 void VncView::outputErrorMessage(const QString &message)
 273 {
 274     kDebug(5011) << message;
 275
 276     if (message == "INTERNAL:APPLE_VNC_COMPATIBILTY") {
 277         setCursor(localDotCursor());
 278         m_forceLocalCursor = true;
 279         return;
 280     }
 281
 282     startQuitting();
 283
 284     emit errorMessage(i18n("VNC failure"), message);
 285 }
 286
 287 void VncView::updateImage(int x, int y, int w, int h)
 288 {
 289         if(!QApplication::focusWidget()) { //no focus, we're probably minimized
 290                 return;
 291         }
 292      //kDebug(5011) << "got update" << width() << height();
 293      static unsigned int frames = 0;
 294      static unsigned int updates = 0;
 295      static QTime time = QTime::currentTime();
 296      updates++;
 297      if(updates % 100 == 0)
 298              kDebug(5011) << "u/s: " << updates/double(time.elapsed()) * 1000.0;
 299 if(x == 0 and y == 0) {
 300         frames++;
 301      if(frames % 100 == 0)
 302              kDebug(5011) << "f/s: " << frames/double(time.elapsed()) * 1000.0;
 303 }
 304
 305     m_x = x;
 306     m_y = y;
 307     m_w = w;
 308     m_h = h;
 309
 310     if (m_horizontalFactor != 1.0 || m_verticalFactor != 1.0) {
 311         // If the view is scaled, grow the update rectangle to avoid artifacts
 312         int x_extrapixels = 1.0/m_horizontalFactor+1;
 313         int y_extrapixels = 1.0/m_verticalFactor+1;
 314
 315         m_x-=x_extrapixels;
 316         m_y-=y_extrapixels;
 317         m_w+=2*x_extrapixels;
 318         m_h+=2*y_extrapixels;
 319     }
 320
 321     m_frame = vncThread.image();
 322
 323     if (!m_initDone) {
 324         setAttribute(Qt::WA_StaticContents);
 325         setAttribute(Qt::WA_OpaquePaintEvent);
 326         installEventFilter(this);
 327
 328         setCursor(((m_dotCursorState == CursorOn) || m_forceLocalCursor) ? localDotCursor() : Qt::BlankCursor);
 329
 330         setMouseTracking(true); // get mouse events even when there is no mousebutton pressed
 331         setFocusPolicy(Qt::WheelFocus);
 332         setStatus(Connected);
 333 //         emit framebufferSizeChanged(m_frame.width(), m_frame.height());
 334         emit connected();
 335
 336         if (m_scale) {
 337             if (parentWidget())
 338                 scaleResize(parentWidget()->width(), parentWidget()->height());
 339             else
 340                 scaleResize(width(), height());
 341         }
 342
 343         m_initDone = true;
 344
 345     }
 346
 347         static QSize old_frame_size = QSize();
 348     if ((y == 0 && x == 0) && (m_frame.size() != old_frame_size)) {
 349             old_frame_size = m_frame.size();
 350         kDebug(5011) << "Updating framebuffer size";
 351         if (m_scale) {
 352             //setMaximumSize(QSize(QWIDGETSIZE_MAX, QWIDGETSIZE_MAX));
 353             if (parentWidget())
 354                 scaleResize(parentWidget()->width(), parentWidget()->height());
 355         } else {
 356             kDebug(5011) << "Resizing: " << m_frame.width() << m_frame.height();
 357             resize(m_frame.width(), m_frame.height());
 358             //setMaximumSize(m_frame.width(), m_frame.height()); //This is a hack to force Qt to center the view in the scroll area
 359             //setMinimumSize(m_frame.width(), m_frame.height());
 360         }
 361         emit framebufferSizeChanged(m_frame.width(), m_frame.height());
 362     }
 363
 364     m_repaint = true;
 365     repaint(qRound(m_x * m_horizontalFactor), qRound(m_y * m_verticalFactor), qRound(m_w * m_horizontalFactor), qRound(m_h * m_verticalFactor));
 366     m_repaint = false;
 367 }
 368
 369 void VncView::setViewOnly(bool viewOnly)
 370 {
 371     RemoteView::setViewOnly(viewOnly);
 372
 373     m_dontSendClipboard = viewOnly;
 374
 375     if (viewOnly)
 376         setCursor(Qt::ArrowCursor);
 377     else
 378         setCursor(m_dotCursorState == CursorOn ? localDotCursor() : Qt::BlankCursor);
 379 }
 380
 381 void VncView::showDotCursor(DotCursorState state)
 382 {
 383     RemoteView::showDotCursor(state);
 384
 385     setCursor(state == CursorOn ? localDotCursor() : Qt::BlankCursor);
 386 }
 387
 388 void VncView::enableScaling(bool scale)
 389 {
 390     RemoteView::enableScaling(scale);
 391
 392     if (scale) {
 393         //setMaximumSize(QSize(QWIDGETSIZE_MAX, QWIDGETSIZE_MAX));
 394         //setMinimumSize(1, 1);
 395         if (parentWidget())
 396             scaleResize(parentWidget()->width(), parentWidget()->height());
 397             else
 398                 scaleResize(width(), height());
 399     } else {
 400         m_verticalFactor = 1.0;
 401         m_horizontalFactor = 1.0;
 402
 403         //setMaximumSize(m_frame.width(), m_frame.height()); //This is a hack to force Qt to center the view in the scroll area
 404         //setMinimumSize(m_frame.width(), m_frame.height());
 405         resize(m_frame.width(), m_frame.height());
 406     }
 407 }
 408
 409 void VncView::setCut(const QString &text)
 410 {
 411     m_dontSendClipboard = true;
 412     m_clipboard->setText(text, QClipboard::Clipboard);
 413     m_clipboard->setText(text, QClipboard::Selection);
 414     m_dontSendClipboard = false;
 415 }
 416
 417 void VncView::paintEvent(QPaintEvent *event)
 418 {
 419      //kDebug(5011) << "paint event: x: " << m_x << ", y: " << m_y << ", w: " << m_w << ", h: " << m_h;
 420     if (m_frame.isNull() || m_frame.format() == QImage::Format_Invalid) {
 421         kDebug(5011) << "no valid image to paint";
 422         RemoteView::paintEvent(event);
 423         return;
 424     }
 425
 426     event->accept();
 427
 428     QPainter painter(this);
 429
 430     if (m_repaint and !force_full_repaint) {
 431 //         kDebug(5011) << "normal repaint";
 432         painter.drawImage(QRect(qRound(m_x*m_horizontalFactor), qRound(m_y*m_verticalFactor),
 433                                 qRound(m_w*m_horizontalFactor), qRound(m_h*m_verticalFactor)),
 434                           m_frame.copy(m_x, m_y, m_w, m_h).scaled(qRound(m_w*m_horizontalFactor),
 435                                                                   qRound(m_h*m_verticalFactor),
 436                                                                   Qt::IgnoreAspectRatio, Qt::SmoothTransformation));
 437     } else {
 438          //kDebug(5011) << "resize repaint";
 439         QRect rect = event->rect();
 440         if (!force_full_repaint and (rect.width() != width() || rect.height() != height())) {
 441           //   kDebug(5011) << "Partial repaint";
 442             const int sx = rect.x()/m_horizontalFactor;
 443             const int sy = rect.y()/m_verticalFactor;
 444             const int sw = rect.width()/m_horizontalFactor;
 445             const int sh = rect.height()/m_verticalFactor;
 446             painter.drawImage(rect,
 447                               m_frame.copy(sx, sy, sw, sh).scaled(rect.width(), rect.height(),
 448                                                                   Qt::IgnoreAspectRatio, Qt::SmoothTransformation));
 449         } else {
 450              kDebug(5011) << "Full repaint" << width() << height() << m_frame.width() << m_frame.height();
 451             painter.drawImage(QRect(0, 0, width(), height()),
 452                               m_frame.scaled(m_frame.width() * m_horizontalFactor, m_frame.height() * m_verticalFactor,
 453                                              Qt::IgnoreAspectRatio, Qt::SmoothTransformation));
 454             force_full_repaint = false;
 455         }
 456     }
 457
 458         //draw local cursor ourselves, normal mouse pointer doesn't deal with scrolling
 459         if((m_dotCursorState == CursorOn) || m_forceLocalCursor) {
 460 #if QT_VERSION >= 0x040500
 461                 painter.setCompositionMode(QPainter::RasterOp_SourceXorDestination);
 462 #endif
 463                 painter.drawRect(cursor_x*m_horizontalFactor - 2, cursor_y*m_verticalFactor - 2, 5, 5);
 464         }
 465
 466     RemoteView::paintEvent(event);
 467 }
 468
 469 void VncView::resizeEvent(QResizeEvent *event)
 470 {
 471     RemoteView::resizeEvent(event);
 472     scaleResize(event->size().width(), event->size().height());
 473     forceFullRepaint();
 474 }
 475
 476 bool VncView::event(QEvent *event)
 477 {
 478     switch (event->type()) {
 479     case QEvent::KeyPress:
 480     case QEvent::KeyRelease:
 481 //         kDebug(5011) << "keyEvent";
 482         keyEventHandler(static_cast<QKeyEvent*>(event));
 483         return true;
 484         break;
 485     case QEvent::MouseButtonDblClick:
 486     case QEvent::MouseButtonPress:
 487     case QEvent::MouseButtonRelease:
 488     case QEvent::MouseMove:
 489 //         kDebug(5011) << "mouseEvent";
 490         mouseEventHandler(static_cast<QMouseEvent*>(event));
 491         return true;
 492         break;
 493     case QEvent::Wheel:
 494 //         kDebug(5011) << "wheelEvent";
 495         wheelEventHandler(static_cast<QWheelEvent*>(event));
 496         return true;
 497         break;
 498     case QEvent::WindowActivate: //input panel may have been closed, prevent IM from interfering with hardware keyboard
 499         setAttribute(Qt::WA_InputMethodEnabled, false);
 500         //fall through
 501     default:
 502         return RemoteView::event(event);
 503     }
 504 }
 505
 506 //call with e == 0 to flush held events
 507 void VncView::mouseEventHandler(QMouseEvent *e)
 508 {
 509         static bool tap_detected = false;
 510         static bool double_tap_detected = false;
 511         static bool tap_drag_detected = false;
 512         static QTime press_time;
 513         static QTime up_time; //used for double clicks/tap&drag, for time after first tap
 514
 515         const int TAP_PRESS_TIME = 180;
 516         const int DOUBLE_TAP_UP_TIME = 500;
 517
 518         if(!e) { //flush held taps
 519                 if(tap_detected) {
 520                         m_buttonMask |= 0x01;
 521                         vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 522                         m_buttonMask &= 0xfe;
 523                         vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 524                         tap_detected = false;
 525                 } else if(double_tap_detected and press_time.elapsed() > TAP_PRESS_TIME) { //got tap + another press -> tap & drag
 526                         m_buttonMask |= 0x01;
 527                         vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 528                         double_tap_detected = false;
 529                         tap_drag_detected = true;
 530                 }
 531
 532                 return;
 533         }
 534
 535         if(e->x() < 0 or e->y() < 0) { //QScrollArea tends to send invalid events sometimes...
 536                 e->ignore();
 537                 return;
 538         }
 539
 540         cursor_x = qRound(e->x()/m_horizontalFactor);
 541         cursor_y = qRound(e->y()/m_verticalFactor);
 542         vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask); // plain move event
 543
 544         if(!disable_tapping and e->button() == Qt::LeftButton) { //implement touchpad-like input for left button
 545                 if(e->type() == QEvent::MouseButtonPress or e->type() == QEvent::MouseButtonDblClick) {
 546                         press_time.start();
 547                         if(tap_detected and up_time.elapsed() < DOUBLE_TAP_UP_TIME) {
 548                                 tap_detected = false;
 549                                 double_tap_detected = true;
 550
 551                                 QTimer::singleShot(TAP_PRESS_TIME, this, SLOT(mouseEventHandler()));
 552                         }
 553                 } else if(e->type() == QEvent::MouseButtonRelease) {
 554                         if(tap_drag_detected) {
 555                                 m_buttonMask &= 0xfe;
 556                                 vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 557                                 tap_drag_detected = false;
 558                         } else if(double_tap_detected) { //double click
 559                                 double_tap_detected = false;
 560
 561                                 m_buttonMask |= 0x01;
 562                                 vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 563                                 m_buttonMask &= 0xfe;
 564                                 vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 565                                 m_buttonMask |= 0x01;
 566                                 vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 567                                 m_buttonMask &= 0xfe;
 568                                 vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 569                         } else if(press_time.elapsed() < TAP_PRESS_TIME) { //tap
 570                                 up_time.start();
 571                                 tap_detected = true;
 572                                 QTimer::singleShot(DOUBLE_TAP_UP_TIME, this, SLOT(mouseEventHandler()));
 573                         }
 574
 575                 }
 576         } else { //middle or right button, send directly
 577                 if ((e->type() == QEvent::MouseButtonPress)) {
 578                     if (e->button() & Qt::MidButton)
 579                         m_buttonMask |= 0x02;
 580                     if (e->button() & Qt::RightButton)
 581                         m_buttonMask |= 0x04;
 582                 } else if (e->type() == QEvent::MouseButtonRelease) {
 583                     if (e->button() & Qt::MidButton)
 584                         m_buttonMask &= 0xfd;
 585                     if (e->button() & Qt::RightButton)
 586                         m_buttonMask &= 0xfb;
 587                 }
 588                 vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 589         }
 590
 591         //prevent local cursor artifacts
 592         static int old_cursor_x = cursor_x;
 593         static int old_cursor_y = cursor_y;
 594         if(((m_dotCursorState == CursorOn) || m_forceLocalCursor)
 595         and (cursor_x != old_cursor_x or cursor_y != old_cursor_y)) {
 596                 //clear last position (plus a few extra pixels)
 597                 repaint(old_cursor_x*m_horizontalFactor - 3, old_cursor_y*m_verticalFactor - 3, 7, 7);
 598                 //and refresh new one
 599                 repaint(cursor_x*m_horizontalFactor - 3, cursor_y*m_verticalFactor - 3, 7, 7);
 600
 601                 old_cursor_x = cursor_x; old_cursor_y = cursor_y;
 602         }
 603 }
 604
 605 void VncView::wheelEventHandler(QWheelEvent *event)
 606 {
 607     int eb = 0;
 608     if (event->delta() < 0)
 609         eb |= 0x10;
 610     else
 611         eb |= 0x8;
 612
 613     const int x = qRound(event->x() / m_horizontalFactor);
 614     const int y = qRound(event->y() / m_verticalFactor);
 615
 616     vncThread.mouseEvent(x, y, eb | m_buttonMask);
 617     vncThread.mouseEvent(x, y, m_buttonMask);
 618 }
 619
 620 void VncView::keyEventHandler(QKeyEvent *e)
 621 {
 622     // strip away autorepeating KeyRelease; see bug #206598
 623     if (e->isAutoRepeat() && (e->type() == QEvent::KeyRelease)) {
 624         return;
 625     }
 626
 627 // parts of this code are based on http://italc.sourcearchive.com/documentation/1.0.9.1/vncview_8cpp-source.html
 628     rfbKeySym k = e->nativeVirtualKey();
 629
 630     // we do not handle Key_Backtab separately as the Shift-modifier
 631     // is already enabled
 632     if (e->key() == Qt::Key_Backtab) {
 633         k = XK_Tab;
 634     }
 635
 636     const bool pressed = (e->type() == QEvent::KeyPress);
 637
 638 #ifdef Q_WS_MAEMO_5
 639     //don't send ISO_Level3_Shift (would break things like Win+0-9)
 640     //also enable IM so symbol key works
 641     if(k == 0xfe03) {
 642             setAttribute(Qt::WA_InputMethodEnabled, pressed);
 643             e->ignore();
 644             return;
 645     }
 646 #endif
 647
 648     // handle modifiers
 649     if (k == XK_Shift_L || k == XK_Control_L || k == XK_Meta_L || k == XK_Alt_L) {
 650         if (pressed) {
 651             m_mods[k] = true;
 652         } else if (m_mods.contains(k)) {
 653             m_mods.remove(k);
 654         } else {
 655             unpressModifiers();
 656         }
 657     }
 658
 659
 660         int current_zoom = -1;
 661         if(e->key() == Qt::Key_F8)
 662                 current_zoom = left_zoom;
 663         else if(e->key() == Qt::Key_F7)
 664                 current_zoom = right_zoom;
 665         else if (k) {
 666         //      kDebug(5011) << "got '" << e->text() << "'.";
 667                 vncThread.keyEvent(k, pressed);
 668         } else {
 669                 kDebug(5011) << "nativeVirtualKey() for '" << e->text() << "' failed.";
 670                 return;
 671         }
 672
 673         if(current_zoom == -1)
 674                 return;
 675
 676         //handle zoom buttons
 677         if(current_zoom == 0) { //left click
 678                 if(pressed)
 679                         m_buttonMask |= 0x01;
 680                 else
 681                         m_buttonMask &= 0xfe;
 682                 vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 683         } else if(current_zoom == 1) { //right click
 684                 if(pressed)
 685                         m_buttonMask |= 0x04;
 686                 else
 687                         m_buttonMask &= 0xfb;
 688                 vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 689         } else if(current_zoom == 2) { //middle click
 690                 if(pressed)
 691                         m_buttonMask |= 0x02;
 692                 else
 693                         m_buttonMask &= 0xfd;
 694                 vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 695         } else if(current_zoom == 3 and pressed) { //wheel up
 696                 int eb = 0x8;
 697                 vncThread.mouseEvent(cursor_x, cursor_y, eb | m_buttonMask);
 698                 vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 699         } else if(current_zoom == 4 and pressed) { //wheel down
 700                 int eb = 0x10;
 701                 vncThread.mouseEvent(cursor_x, cursor_y, eb | m_buttonMask);
 702                 vncThread.mouseEvent(cursor_x, cursor_y, m_buttonMask);
 703         } else if(current_zoom == 5) { //page up
 704                 vncThread.keyEvent(0xff55, pressed);
 705         } else if(current_zoom == 6) { //page down
 706                 vncThread.keyEvent(0xff56, pressed);
 707         }
 708 }
 709
 710 void VncView::unpressModifiers()
 711 {
 712     const QList<unsigned int> keys = m_mods.keys();
 713     QList<unsigned int>::const_iterator it = keys.constBegin();
 714     while (it != keys.end()) {
 715         vncThread.keyEvent(*it, false);
 716         it++;
 717     }
 718     m_mods.clear();
 719 }
 720
 721 void VncView::clipboardSelectionChanged()
 722 {
 723     if (m_status != Connected)
 724         return;
 725
 726     if (m_clipboard->ownsSelection() || m_dontSendClipboard)
 727         return;
 728
 729     const QString text = m_clipboard->text(QClipboard::Selection);
 730
 731     vncThread.clientCut(text);
 732 }
 733
 734 void VncView::clipboardDataChanged()
 735 {
 736     if (m_status != Connected)
 737         return;
 738
 739     if (m_clipboard->ownsClipboard() || m_dontSendClipboard)
 740         return;
 741
 742     const QString text = m_clipboard->text(QClipboard::Clipboard);
 743
 744     vncThread.clientCut(text);
 745 }
 746
 747 //fake key events
 748 void VncView::sendKey(Qt::Key key)
 749 {
 750         //convert Qt::Key into x11 keysym
 751         int k = 0;
 752         switch(key) {
 753         case Qt::Key_Escape:
 754                 k = 0xff1b;
 755                 break;
 756         case Qt::Key_Tab:
 757                 k = 0xff09;
 758                 break;
 759         case Qt::Key_PageUp:
 760                 k = 0xff55;
 761                 break;
 762         case Qt::Key_PageDown:
 763                 k = 0xff56;
 764                 break;
 765         case Qt::Key_Return:
 766                 k = 0xff0d;
 767                 break;
 768         case Qt::Key_Insert:
 769                 k = 0xff63;
 770                 break;
 771         case Qt::Key_Delete:
 772                 k = 0xffff;
 773                 break;
 774         case Qt::Key_Home:
 775                 k = 0xff50;
 776                 break;
 777         case Qt::Key_End:
 778                 k = 0xff57;
 779                 break;
 780         case Qt::Key_Backspace:
 781                 k = 0xff08;
 782                 break;
 783         case Qt::Key_F1:
 784         case Qt::Key_F2:
 785         case Qt::Key_F3:
 786         case Qt::Key_F4:
 787         case Qt::Key_F5:
 788         case Qt::Key_F6:
 789         case Qt::Key_F7:
 790         case Qt::Key_F8:
 791         case Qt::Key_F9:
 792         case Qt::Key_F10:
 793         case Qt::Key_F11:
 794         case Qt::Key_F12:
 795                 k = 0xffbe + int(key - Qt::Key_F1);
 796                 break;
 797         case Qt::Key_Meta:
 798         case Qt::MetaModifier:
 799                 k = XK_Super_L;
 800                 break;
 801         case Qt::Key_Alt:
 802         case Qt::AltModifier:
 803                 k = XK_Alt_L;
 804                 break;
 805         case Qt::Key_Control:
 806         case Qt::ControlModifier:
 807                 k = XK_Control_L;
 808                 break;
 809         default:
 810                 kDebug(5011) << "sendKey(): Unhandled Qt::Key value " << key;
 811                 return;
 812         }
 813
 814         if (k == XK_Shift_L || k == XK_Control_L || k == XK_Meta_L || k == XK_Alt_L || k == XK_Super_L) {
 815                 if (m_mods.contains(k)) { //release
 816                         m_mods.remove(k);
 817                         vncThread.keyEvent(k, false);
 818                 } else { //press
 819                         m_mods[k] = true;
 820                         vncThread.keyEvent(k, true);
 821                 }
 822         } else { //normal key
 823                 vncThread.keyEvent(k, true);
 824                 vncThread.keyEvent(k, false);
 825         }
 826 }
 827
 828 void VncView::sendKeySequence(QKeySequence keys)
 829 {
 830         Q_ASSERT(keys.count() <= 1); //we can only handle a single combination
 831
 832         //to get at individual key presses, we split 'keys' into its components
 833         QList<int> key_list;
 834         for(int i = 0; ; i++) {
 835                 QString k = keys.toString().section('+', i, i);
 836                 if(k.isEmpty())
 837                         break;
 838                 //kDebug(5011) << "found key: " << k;
 839                 if(k == "Alt") {
 840                         key_list.append(Qt::Key_Alt);
 841                 } else if(k == "Ctrl") {
 842                         key_list.append(Qt::Key_Control);
 843                 } else if(k == "Meta") {
 844                         key_list.append(Qt::Key_Meta);
 845                 } else {
 846                         key_list.append(QKeySequence(k)[0]);
 847                 }
 848         }
 849
 850         for(int i = 0; i < key_list.count(); i++)
 851                 sendKey(Qt::Key(key_list.at(i)));
 852
 853         //release modifiers (everything before final key)
 854         for(int i = key_list.count()-2; i >= 0; i--)
 855                 sendKey(Qt::Key(key_list.at(i)));
 856 }
 857
 858 void VncView::reloadSettings()
 859 {
 860         QSettings settings;
 861         left_zoom = settings.value("left_zoom", 0).toInt();
 862         right_zoom = settings.value("right_zoom", 1).toInt();
 863         disable_tapping = settings.value("disable_tapping", false).toBool();
 864
 865         bool always_show_local_cursor = settings.value("always_show_local_cursor", false).toBool();
 866         if(always_show_local_cursor)
 867                 showDotCursor(CursorOn);
 868 }
 869
 870 //convert commitString into keyevents
 871 void VncView::inputMethodEvent(QInputMethodEvent *event)
 872 {
 873         //TODO handle replacements
 874         //NOTE for the return key to work Qt needs to enable multiline input, which only works for Q(Plain)TextEdit
 875
 876         //kDebug(5011) << event->commitString() << "|" << event->preeditString() << "|" << event->replacementLength() << "|" << event->replacementStart();
 877         QString letters = event->commitString();
 878         for(int i = 0; i < letters.length(); i++) {
 879                 char k = letters.at(i).toLatin1(); //works with all 'normal' keys, not umlauts.
 880                 if(!k) {
 881                         kDebug(5011) << "unhandled key";
 882                         continue;
 883                 }
 884                 vncThread.keyEvent(k, true);
 885                 vncThread.keyEvent(k, false);
 886         }
 887 }
 888
 889
 890 #include "moc_vncview.cpp"