void qt_handle_xdnd_position( QWidget *w, const XEvent * xe )
{
const unsigned long *l = (const unsigned long *)xe->xclient.data.l;
QPoint p( (l[2] & 0xffff0000) >> 16, l[2] & 0x0000ffff );
QWidget * c = find_child( w, p );
if ( !c || !c->acceptDrops() && c->isDesktop() )
return;
if ( l[0] != qt_xdnd_dragsource_xid ) {
//debug( "xdnd drag position from unexpected source (%08lx not %08lx)",
// l[0], qt_xdnd_dragsource_xid );
return;
}
XClientMessageEvent response;
response.type = ClientMessage;
response.window = qt_xdnd_dragsource_xid;
response.format = 32;
response.message_type = qt_xdnd_status;
response.data.l[0] = w->winId();
response.data.l[1] = 0; // flags
response.data.l[2] = 0; // x, y
response.data.l[3] = 0; // w, h
response.data.l[4] = 0; // just null
QRect answerRect( c->mapToGlobal( p ), QSize( 1,1 ) );
QDragMoveEvent me( p );
if ( qt_xdnd_current_widget != c ) {
qt_xdnd_target_answerwas = FALSE;
if ( qt_xdnd_current_widget ) {
QDragLeaveEvent e;
QApplication::sendEvent( qt_xdnd_current_widget, &e );
}
if ( c->acceptDrops() ) {
QDragEnterEvent de( p );
QApplication::sendEvent( c, &de );
if ( de.isAccepted() )
me.accept( de.answerRect() );
else
me.ignore( de.answerRect() );
}
} else {
if ( qt_xdnd_target_answerwas )
me.accept();
}
if ( !c->acceptDrops() ) {
qt_xdnd_current_widget = 0;
answerRect = QRect( p, QSize( 1, 1 ) );
} else if ( l[4] != qt_xdnd_action_copy ) {
response.data.l[0] = 0;
answerRect = QRect( p, QSize( 1, 1 ) );
} else {
qt_xdnd_current_widget = c;
qt_xdnd_current_position = p;
qt_xdnd_target_current_time = l[3]; // will be 0 for xdnd1
QApplication::sendEvent( c, &me );
qt_xdnd_target_answerwas = me.isAccepted();
if ( me.isAccepted() )
response.data.l[1] = 1; // yess!!!!
else
response.data.l[0] = 0;
answerRect = me.answerRect().intersect( c->rect() );
}
answerRect = QRect( c->mapToGlobal( answerRect.topLeft() ),
answerRect.size() );
if ( answerRect.width() < 0 )
answerRect.setWidth( 0 );
if ( answerRect.height() < 0 )
answerRect.setHeight( 0 );
if ( answerRect.left() < 0 )
answerRect.setLeft( 0 );
if ( answerRect.right() > 4096 )
answerRect.setRight( 4096 );
if ( answerRect.top() < 0 )
answerRect.setTop( 0 );
if ( answerRect.bottom() > 4096 )
answerRect.setBottom( 4096 );
response.data.l[2] = (answerRect.x() << 16) + answerRect.y();
response.data.l[3] = (answerRect.width() << 16) + answerRect.height();
response.data.l[4] = qt_xdnd_action_copy;
QWidget * source = QWidget::find( qt_xdnd_dragsource_xid );
int emask = NoEventMask;
if ( source && source->isDesktop() && !source->acceptDrops() ) {
emask = EnterWindowMask;
source = 0;
}
if ( source )
qt_handle_xdnd_status( source, (const XEvent *)&response );
else
XSendEvent( qt_xdisplay(), qt_xdnd_dragsource_xid, FALSE,
emask, (XEvent*)&response );
}
void qt_handle_xdnd_position( QWidget *w, const XEvent * xe, bool passive )
{
const unsigned long *l = (const unsigned long *)xe->xclient.data.l;
QPoint p( (l[2] & 0xffff0000) >> 16, l[2] & 0x0000ffff );
QWidget * c = find_child( w, p ); // changes p to to c-local coordinates
if (!passive && checkEmbedded(c, xe))
return;
if ( !c || !c->acceptDrops() && c->isDesktop() ) {
return;
}
if ( l[0] != qt_xdnd_dragsource_xid ) {
//qDebug( "xdnd drag position from unexpected source (%08lx not %08lx)",
// l[0], qt_xdnd_dragsource_xid );
return;
}
if (l[3] != 0) {
// timestamp from the source
qt_xdnd_target_current_time = qt_x_user_time = l[3];
}
XClientMessageEvent response;
response.type = ClientMessage;
response.window = qt_xdnd_dragsource_xid;
response.format = 32;
response.message_type = qt_xdnd_status;
response.data.l[0] = w->winId();
response.data.l[1] = 0; // flags
response.data.l[2] = 0; // x, y
response.data.l[3] = 0; // w, h
response.data.l[4] = 0; // action
if ( !passive ) { // otherwise just reject
while ( c && !c->acceptDrops() && !c->isTopLevel() ) {
p = c->mapToParent( p );
c = c->parentWidget();
}
QRect answerRect( c->mapToGlobal( p ), QSize( 1,1 ) );
QDragMoveEvent me( p );
QDropEvent::Action accepted_action = xdndaction_to_qtaction(l[4]);
me.setAction(accepted_action);
if ( c != qt_xdnd_current_widget ) {
qt_xdnd_target_answerwas = FALSE;
if ( qt_xdnd_current_widget ) {
QDragLeaveEvent e;
QApplication::sendEvent( qt_xdnd_current_widget, &e );
}
if ( c->acceptDrops() ) {
qt_xdnd_current_widget = c;
qt_xdnd_current_position = p;
QDragEnterEvent de( p );
de.setAction(accepted_action);
QApplication::sendEvent( c, &de );
if ( de.isAccepted() ) {
me.accept( de.answerRect() );
if ( !de.isActionAccepted() ) // only as a copy (move if we del)
accepted_action = QDropEvent::Copy;
else
me.acceptAction(TRUE);
} else {
me.ignore( de.answerRect() );
}
}
} else {
if ( qt_xdnd_target_answerwas ) {
me.accept();
me.acceptAction(global_requested_action == global_accepted_action);
}
}
if ( !c->acceptDrops() ) {
qt_xdnd_current_widget = 0;
answerRect = QRect( p, QSize( 1, 1 ) );
} else if ( xdndaction_to_qtaction(l[4]) < QDropEvent::Private ) {
qt_xdnd_current_widget = c;
qt_xdnd_current_position = p;
QApplication::sendEvent( c, &me );
qt_xdnd_target_answerwas = me.isAccepted();
if ( me.isAccepted() ) {
response.data.l[1] = 1; // yes
if ( !me.isActionAccepted() ) // only as a copy (move if we del)
accepted_action = QDropEvent::Copy;
} else {
response.data.l[0] = 0;
}
answerRect = me.answerRect().intersect( c->rect() );
} else {
response.data.l[0] = 0;
answerRect = QRect( p, QSize( 1, 1 ) );
}
answerRect = QRect( c->mapToGlobal( answerRect.topLeft() ),
answerRect.size() );
if ( answerRect.left() < 0 )
answerRect.setLeft( 0 );
if ( answerRect.right() > 4096 )
answerRect.setRight( 4096 );
if ( answerRect.top() < 0 )
answerRect.setTop( 0 );
if ( answerRect.bottom() > 4096 )
answerRect.setBottom( 4096 );
if ( answerRect.width() < 0 )
answerRect.setWidth( 0 );
if ( answerRect.height() < 0 )
answerRect.setHeight( 0 );
response.data.l[2] = (answerRect.x() << 16) + answerRect.y();
response.data.l[3] = (answerRect.width() << 16) + answerRect.height();
response.data.l[4] = qtaction_to_xdndaction(accepted_action);
global_accepted_action = accepted_action;
}
// reset
qt_xdnd_target_current_time = CurrentTime;
QWidget * source = QWidget::find( qt_xdnd_dragsource_xid );
if ( source && source->isDesktop() && !source->acceptDrops() )
source = 0;
if ( source )
qt_handle_xdnd_status( source, (const XEvent *)&response, passive );
else
XSendEvent( QPaintDevice::x11AppDisplay(), qt_xdnd_dragsource_xid, False,
NoEventMask, (XEvent*)&response );
}