Can not debug my custom widget by using break point
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I create a widget which was inherited from QComboBox, and I re-write the hidePopup() to let my widget would not hide popup when a item was clicked( to support multi select ).
It works, but when I use break point to debug my program, if we get to the break point when my custom widget's popup was not hide, everything seems froze, I can not control anything with the popup always on the top. The only thing I can do is reboot my computer by long pressing my power key.
I don't know what happened, but it seems the popup of my widget catch the keyboard focus(I guess)
If I remove my re-write hidePopup(), the break point works well.
Anyone can help me? -
I create a widget which was inherited from QComboBox, and I re-write the hidePopup() to let my widget would not hide popup when a item was clicked( to support multi select ).
It works, but when I use break point to debug my program, if we get to the break point when my custom widget's popup was not hide, everything seems froze, I can not control anything with the popup always on the top. The only thing I can do is reboot my computer by long pressing my power key.
I don't know what happened, but it seems the popup of my widget catch the keyboard focus(I guess)
If I remove my re-write hidePopup(), the break point works well.
Anyone can help me? -
@86926891 You app is simply paused as long as it is waiting at the breakpoint, just press F5 to continue from the break point...
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@jsulm I know that, but F5, F10 & F11 do not works with the popup always on the top( even on the top of Qt Creator)
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@jsulm This is how I re-write the hidePopup:
void hidePopup()
{
int width = this->width();
int height = mListWidget->height();
int x = QCursor::pos().x() - mapToGlobal(geometry().topLeft()).x() + geometry().x();
int y = QCursor::pos().y() - mapToGlobal(geometry().topLeft()).y() + geometry().y();
if (x >= 0 && x <= width && y >= this->height() && y <= height + this->height())
{
// Item was clicked, do not hide popup
}
else
{
QComboBox::hidePopup();
}
}The purpose of re-writing hidePopup() is to avoid the popup was hided when I click an item of my combobox
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@jsulm This is how I re-write the hidePopup:
void hidePopup()
{
int width = this->width();
int height = mListWidget->height();
int x = QCursor::pos().x() - mapToGlobal(geometry().topLeft()).x() + geometry().x();
int y = QCursor::pos().y() - mapToGlobal(geometry().topLeft()).y() + geometry().y();
if (x >= 0 && x <= width && y >= this->height() && y <= height + this->height())
{
// Item was clicked, do not hide popup
}
else
{
QComboBox::hidePopup();
}
}The purpose of re-writing hidePopup() is to avoid the popup was hided when I click an item of my combobox
@86926891
I don't know your exact situation, but:-
You are suppressing the fundamental ability to hide/dismiss the popup (when for whatever reason the
ifroute of your code is followed). This may interfere with the basic working of a combobox, which might make things go nasty as you describe. Windows does a funny thing with the dropdown list of a combobox when it is displayed, making it a detached window which lies on top of everything; quite possibly it has grabbed keyboard focus too, basically Windows is waiting for that popup to disappear before anything else. Even native debuggers have a problem whereby if you hit a breakpoint when it is displayed you are stuck with the dropdown visible on top of everything else, which does not disappear till the popup gets closed, sometimes making debugging a bit awkward. -
QComboBox/native combobox is an inherently single-select widget/control. Trying to make it multiselect sounds quite wrong to me. Use aQListWidgetor something.
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