BOptionPopUp sets value even if not available

[jackburton]

With BOptionPopUp::SetValue() you can set a value which does not exist. As you can see from the implementation, it sets the value of the BControl by calling BControl::SetValue(), but later it could return, if there is no option with that value. Calling Value() will then return the newly set value.

void
BOptionPopUp::SetValue(int32 value)
{
	BControl::SetValue(value);
	BMenu* menu = fMenuField->Menu();
	if (menu == NULL)
		return;

	int32 numItems = menu->CountItems();
	for (int32 i = 0; i < numItems; i++) {
		BMenuItem* item = menu->ItemAt(i);
		if (item && item->Message()) {
			int32 itemValue;
			item->Message()->FindInt32("be:value", &itemValue);
			if (itemValue == value) {
				item->SetMarked(true);
				break;
			}
		}
	}
}

If I remember correctly, this behaviour is inherited from BeOS, but maybe it doesn't make much sense, and could be confusing.