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    41 

    42 #include "qapplication.h"

    43 

    44 #ifndef QT_NO_DRAGANDDROP

    45 

    46 #include "qwidget.h"

    47 #include "qdatetime.h"

    48 #include "qbitmap.h"

    49 #include "qcursor.h"

    50 #include "qevent.h"

    51 #include "qpainter.h"

    52 #include "qdnd_p.h"

    53 #include "qt_s60_p.h"

    54 

    55 #include <COECNTRL.H>

    56 // pointer cursor

    57 #include <w32std.h>

    58 #include <gdi.h>

    59 #include <QCursor>

    60 

    61 QT_BEGIN_NAMESPACE

    62 //### artistic impression of Symbians default DnD cursor ?

    63 

    64 static QPixmap *defaultPm = 0;

    65 static const int default_pm_hotx = -50;

    66 static const int default_pm_hoty = -50;

    67 static const char *const default_pm[] = {

    68 "13 9 3 1",

    69 ".      c None",

    70 "       c #000000",

    71 "X      c #FFFFFF",

    72 "X X X X X X X",

    73 " X X X X X X ",

    74 "X ......... X",

    75 " X.........X ",

    76 "X ......... X",

    77 " X.........X ",

    78 "X ......... X",

    79 " X X X X X X ",

    80 "X X X X X X X",

    81 };

    82 //### actions need to be redefined for S60

    83 // Shift/Ctrl handling, and final drop status

    84 static Qt::DropAction global_accepted_action = Qt::MoveAction;

    85 static Qt::DropActions possible_actions = Qt::IgnoreAction;

    86 

    87 

    88 // static variables in place of a proper cross-process solution

    89 static QDrag *drag_object;

    90 static bool qt_symbian_dnd_dragging = false;

    91 

    92 

    93 static Qt::KeyboardModifiers oldstate;

    94 

    95 void QDragManager::updatePixmap()

    96 {

    97     QPixmap pm;

    98     QPoint pm_hot(default_pm_hotx,default_pm_hoty);

    99     if (drag_object) {

   100         pm = drag_object->pixmap();

   101         if (!pm.isNull())

   102             pm_hot = drag_object->hotSpot();

   103     }

   104     if (pm.isNull()) {

   105         if (!defaultPm)

   106             defaultPm = new QPixmap(default_pm);

   107         pm = *defaultPm;

   108     }

   109 #ifndef QT_NO_CURSOR

   110     QCursor cursor(pm, pm_hot.x(), pm_hot.y());

   111     overrideCursor = cursor;

   112 #endif

   113 }

   114 

   115 void QDragManager::timerEvent(QTimerEvent *) { }

   116 

   117 void QDragManager::move(const QPoint&) {

   118 }

   119 

   120 void QDragManager::updateCursor()

   121 {

   122 #ifndef QT_NO_CURSOR

   123     QCursor cursor = willDrop ? overrideCursor : Qt::ForbiddenCursor;

   124     if (!restoreCursor) {

   125         QApplication::setOverrideCursor(cursor);

   126         restoreCursor = true;

   127     }

   128     else {

   129         QApplication::changeOverrideCursor(cursor);

   130     }

   131 #endif

   132 }

   133 

   134 

   135 bool QDragManager::eventFilter(QObject *o, QEvent *e)

   136 {

   137  if (beingCancelled) {

   138         return false;

   139     }

   140     if (!o->isWidgetType())

   141         return false;

   142 

   143     switch(e->type()) {

   144         case QEvent::MouseButtonPress:

   145         {

   146         }

   147         case QEvent::MouseMove:

   148         {

   149             if (!object) { //#### this should not happen

   150                 qWarning("QDragManager::eventFilter: No object");

   151                 return true;

   152             }

   153             QDragManager *manager = QDragManager::self();

   154             QMimeData *dropData = manager->object ? manager->dragPrivate()->data : manager->dropData;

   155             if (manager->object)

   156                 possible_actions =  manager->dragPrivate()->possible_actions;

   157             else

   158                 possible_actions = Qt::IgnoreAction;

   159 

   160             QMouseEvent *me = (QMouseEvent *)e;

   161 

   162             if (me->buttons()) {

   163                 Qt::DropAction prevAction = global_accepted_action;

   164                 QWidget *cw = QApplication::widgetAt(me->globalPos());

   165                 // map the Coords relative to the window.

   166                 if (!cw)

   167                     return true;

   168 

   169                 while (cw && !cw->acceptDrops() && !cw->isWindow())

   170                     cw = cw->parentWidget();

   171 

   172                 bool oldWillDrop = willDrop;

   173                 if (object->target() != cw) {

   174                     if (object->target()) {

   175                         QDragLeaveEvent dle;

   176                         QApplication::sendEvent(object->target(), &dle);

   177                         willDrop = false;

   178                         global_accepted_action = Qt::IgnoreAction;

   179                         if (oldWillDrop != willDrop)

   180                             updateCursor();

   181                         object->d_func()->target = 0;

   182                     }

   183                     if (cw && cw->acceptDrops()) {

   184                         object->d_func()->target = cw;

   185                         QDragEnterEvent dee(cw->mapFromGlobal(me->globalPos()), possible_actions, dropData,

   186                                             me->buttons(), me->modifiers());

   187                         QApplication::sendEvent(object->target(), &dee);

   188                         willDrop = dee.isAccepted() && dee.dropAction() != Qt::IgnoreAction;

   189                         global_accepted_action = willDrop ? dee.dropAction() : Qt::IgnoreAction;

   190                         if (oldWillDrop != willDrop)

   191                             updateCursor();

   192                     }

   193                 } else if (cw) {

   194                     QDragMoveEvent dme(cw->mapFromGlobal(me->globalPos()), possible_actions, dropData,

   195                                        me->buttons(), me->modifiers());

   196                     if (global_accepted_action != Qt::IgnoreAction) {

   197                         dme.setDropAction(global_accepted_action);

   198                         dme.accept();

   199                     }

   200                     QApplication::sendEvent(cw, &dme);

   201                     willDrop = dme.isAccepted();

   202                     global_accepted_action = willDrop ? dme.dropAction() : Qt::IgnoreAction;

   203                     if (oldWillDrop != willDrop) {

   204                         updatePixmap();

   205                         updateCursor();

   206                     }

   207                 }

   208                 if (global_accepted_action != prevAction)

   209                     emitActionChanged(global_accepted_action);

   210             }

   211             return true; // Eat all mouse events

   212         }

   213 

   214         case QEvent::MouseButtonRelease:

   215         {

   216             qApp->removeEventFilter(this);

   217 #ifndef QT_NO_CURSOR

   218             if (restoreCursor) {

   219                 QApplication::restoreOverrideCursor();

   220                 willDrop = false;

   221                 restoreCursor = false;

   222             }

   223 #endif

   224             if (object && object->target()) {

   225 

   226                 QMouseEvent *me = (QMouseEvent *)e;

   227 

   228                 QDragManager *manager = QDragManager::self();

   229                 QMimeData *dropData = manager->object ? manager->dragPrivate()->data : manager->dropData;

   230 

   231                 QDropEvent de(object->target()->mapFromGlobal(me->globalPos()), possible_actions, dropData,

   232                               me->buttons(), me->modifiers());

   233                 QApplication::sendEvent(object->target(), &de);

   234                 if (de.isAccepted())

   235                     global_accepted_action = de.dropAction();

   236                 else

   237                     global_accepted_action = Qt::IgnoreAction;

   238 

   239                 if (object)

   240                     object->deleteLater();

   241                 drag_object = object = 0;

   242             }

   243             eventLoop->exit();

   244             return true; // Eat all mouse events

   245         }

   246 

   247         default:

   248              break;

   249     }

   250     return false;

   251 }

   252 

   253 Qt::DropAction QDragManager::drag(QDrag *o)

   254 {

   255     Q_ASSERT(!qt_symbian_dnd_dragging);

   256     if (object == o || !o || !o->source())

   257          return Qt::IgnoreAction;

   258 

   259     if (object) {

   260         cancel();

   261         qApp->removeEventFilter(this);

   262         beingCancelled = false;

   263     }

   264 

   265     object = drag_object = o;

   266 

   267     oldstate = Qt::NoModifier; // #### Should use state that caused the drag

   268     willDrop = false;

   269     updatePixmap();

   270     updateCursor();

   271 

   272 #ifndef QT_NO_CURSOR

   273     qt_symbian_set_cursor_visible(true); //force cursor on even for touch phone

   274 #endif

   275 

   276     object->d_func()->target = 0;

   277 

   278     qApp->installEventFilter(this);

   279 

   280     global_accepted_action = defaultAction(dragPrivate()->possible_actions, Qt::NoModifier);

   281     qt_symbian_dnd_dragging = true;

   282 

   283     eventLoop = new QEventLoop;

   284     // block

   285     (void) eventLoop->exec(QEventLoop::AllEvents);

   286     delete eventLoop;

   287     eventLoop = 0;

   288 

   289 #ifndef QT_NO_CURSOR

   290     qt_symbian_set_cursor_visible(false);

   291 

   292     overrideCursor = QCursor(); //deref the cursor data

   293     qt_symbian_dnd_dragging = false;

   294 #endif

   295 

   296     return global_accepted_action;

   297 }

   298 

   299 

   300 void QDragManager::cancel(bool deleteSource)

   301 {

   302     beingCancelled = true;

   303 

   304     if (object->target()) {

   305         QDragLeaveEvent dle;

   306         QApplication::sendEvent(object->target(), &dle);

   307     }

   308 

   309     if (drag_object) {

   310         if (deleteSource)

   311             object->deleteLater();

   312         drag_object = object = 0;

   313     }

   314 

   315 #ifndef QT_NO_CURSOR

   316     if (restoreCursor) {

   317         QApplication::restoreOverrideCursor();

   318         restoreCursor = false;

   319     }

   320 #endif

   321 

   322     global_accepted_action = Qt::IgnoreAction;

   323 }

   324 

   325 

   326 void QDragManager::drop()

   327 {

   328 #ifndef QT_NO_CURSOR

   329     if (restoreCursor) {

   330         QApplication::restoreOverrideCursor();

   331         restoreCursor = false;

   332     }

   333 #endif

   334 }

   335 

   336 QVariant QDropData::retrieveData_sys(const QString &mimetype, QVariant::Type type) const

   337 {

   338     if (!drag_object)

   339         return QVariant();

   340     QByteArray data =  drag_object->mimeData()->data(mimetype);

   341     if (type == QVariant::String)

   342         return QString::fromUtf8(data);

   343     return data;

   344 }

   345 

   346 bool QDropData::hasFormat_sys(const QString &format) const

   347 {

   348     return formats().contains(format);

   349 }

   350 

   351 QStringList QDropData::formats_sys() const

   352 {

   353     if (drag_object)

   354         return drag_object->mimeData()->formats();

   355     return QStringList();

   356 }

   357 

   358 QT_END_NAMESPACE

   359 #endif // QT_NO_DRAGANDDROP