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Use a weak pointer to store picked event handler

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Fixes crash while item is picked and changing layers
This commit is contained in:
Dan Paulat 2024-08-03 23:09:27 -05:00
parent f2b2fce5c5
commit 2e1b537c87
1 changed files with 22 additions and 13 deletions
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35
scwx-qt/source/scwx/qt/map/map_widget.cpp
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@ -244,7 +244,7 @@ public:
Qt::KeyboardModifiers lastKeyboardModifiers_ {
Qt::KeyboardModifier::NoModifier};
std::shared_ptr<types::EventHandler> pickedEventHandler_ {nullptr};
std::weak_ptr<types::EventHandler> weakPickedEventHandler_ {};
uint64_t frameDraws_;
@ -1320,11 +1320,12 @@ bool MapWidget::event(QEvent* e)
return true;
}
if (p->pickedEventHandler_ != nullptr &&
p->pickedEventHandler_->event_ != nullptr)
auto pickedEventHandler = p->weakPickedEventHandler_.lock();
if (pickedEventHandler != nullptr && pickedEventHandler->event_ != nullptr)
{
p->pickedEventHandler_->event_(e);
pickedEventHandler->event_(e);
}
pickedEventHandler.reset();
return QOpenGLWidget::event(e);
}
@ -1593,34 +1594,35 @@ void MapWidgetImpl::RunMousePicking()
}
// If no draw item was picked, hide the tooltip
auto prevPickedEventHandler = weakPickedEventHandler_.lock();
if (!itemPicked)
{
util::tooltip::Hide();
if (pickedEventHandler_ != nullptr)
if (prevPickedEventHandler != nullptr)
{
// Send leave event to picked event handler
if (pickedEventHandler_->event_ != nullptr)
if (prevPickedEventHandler->event_ != nullptr)
{
QEvent event(QEvent::Type::Leave);
pickedEventHandler_->event_(&event);
prevPickedEventHandler->event_(&event);
}
// Reset picked event handler
pickedEventHandler_ = nullptr;
weakPickedEventHandler_.reset();
}
}
else if (eventHandler != nullptr)
{
// If the event handler changed
if (pickedEventHandler_ != eventHandler)
if (prevPickedEventHandler != eventHandler)
{
// Send leave event to old event handler
if (pickedEventHandler_ != nullptr &&
pickedEventHandler_->event_ != nullptr)
if (prevPickedEventHandler != nullptr &&
prevPickedEventHandler->event_ != nullptr)
{
QEvent event(QEvent::Type::Leave);
pickedEventHandler_->event_(&event);
prevPickedEventHandler->event_(&event);
}
// Send enter event to new event handler
@ -1631,8 +1633,15 @@ void MapWidgetImpl::RunMousePicking()
}
// Store picked event handler
pickedEventHandler_ = eventHandler;
weakPickedEventHandler_ = eventHandler;
}
eventHandler.reset();
}
if (prevPickedEventHandler != nullptr)
{
prevPickedEventHandler.reset();
}
Q_EMIT widget_->MouseCoordinateChanged(