[Qt] postevent emit ----event與signal
阿新 • • 發佈：2019-01-22
//QObject::event()在QWidget中被重新實現，對event的處理變得更完善。
bool QWidget::event( QEvent *e )
{
if ( QObject::event( e ) )
return TRUE;
switch ( e->type() ) {
case QEvent::MouseMove:
mouseMoveEvent( (QMouseEvent*)e );
break;
case QEvent::MouseButtonPress:
mousePressEvent( (QMouseEvent*)e );
break;
case QEvent::MouseButtonRelease:
mouseReleaseEvent( (QMouseEvent*)e );
break;
case QEvent::MouseButtonDblClick:
mouseDoubleClickEvent( (QMouseEvent*)e );
break;
case QEvent::Wheel:
wheelEvent( (QWheelEvent*)e );
if ( ! ((QWheelEvent*)e)->isAccepted() )
return FALSE;
break;
case QEvent::KeyPress
QKeyEvent *k = (QKeyEvent *)e;
bool res = FALSE;
if ( k->key() == Key_Backtab ||
(k->key() == Key_Tab &&
(k->state() & ShiftButton)) ) {
QFocusEvent::setReason( QFocusEvent::Tab );
res = focusNextPrevChild( FALSE );
QFocusEvent::resetReason();
} else if ( k->key() == Key_Tab ) {
QFocusEvent::setReason( QFocusEvent::Tab );
res = focusNextPrevChild( TRUE );
QFocusEvent::resetReason();
}
if ( res )
break;
QWidget *w = this;
while ( w ) {
w->keyPressEvent( k );
if ( k->isAccepted() || w->isTopLevel() )
bool QWidget::event( QEvent *e )
{
if ( QObject::event( e ) )
return TRUE;
switch ( e->type() ) {
case QEvent::MouseMove:
mouseMoveEvent( (QMouseEvent*)e );
break;
case QEvent::MouseButtonPress:
mousePressEvent( (QMouseEvent*)e );
break;
case QEvent::MouseButtonRelease:
mouseReleaseEvent( (QMouseEvent*)e );
break;
case QEvent::MouseButtonDblClick:
mouseDoubleClickEvent( (QMouseEvent*)e );
break;
case QEvent::Wheel:
wheelEvent( (QWheelEvent*)e );
if ( ! ((QWheelEvent*)e)->isAccepted() )
return FALSE;
break;
case QEvent::KeyPress
QKeyEvent *k = (QKeyEvent *)e;
bool res = FALSE;
if ( k->key() == Key_Backtab ||
(k->key() == Key_Tab &&
(k->state() & ShiftButton)) ) {
QFocusEvent::setReason( QFocusEvent::Tab );
res = focusNextPrevChild( FALSE );
QFocusEvent::resetReason();
} else if ( k->key() == Key_Tab ) {
QFocusEvent::setReason( QFocusEvent::Tab );
res = focusNextPrevChild( TRUE );
QFocusEvent::resetReason();
}
if ( res )
break;
QWidget *w = this;
while ( w ) {
w->keyPressEvent( k );
if ( k->isAccepted() || w->isTopLevel() )