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#ifndef LAZY_FILL_COMBO_BOX_HPP__
#define LAZY_FILL_COMBO_BOX_HPP__
#include <QComboBox>
class QWidget;
//
// Class LazyFillComboBox
//
// QComboBox derivative that signals show and hide of the pop up list.
//
class LazyFillComboBox : public QComboBox {
Q_OBJECT
public:
Q_SIGNAL void about_to_show_popup();
Q_SIGNAL void popup_hidden();
explicit LazyFillComboBox(QWidget *parent = nullptr) : QComboBox{parent} {}
#if QT_VERSION >= QT_VERSION_CHECK(5, 12, 0)
void showPopup() override {
Q_EMIT about_to_show_popup();
QComboBox::showPopup();
}
void hidePopup() override {
QComboBox::hidePopup();
Q_EMIT popup_hidden();
}
#else
void mousePressEvent(QMouseEvent *e) override {
Q_EMIT about_to_show_popup();
QComboBox::mousePressEvent(e);
}
void mouseReleaseEvent(QMouseEvent *e) override {
QComboBox::mouseReleaseEvent(e);
Q_EMIT popup_hidden();
}
#endif
};
#endif
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