Question:
It's getting a little weird I can't see a method to actually change the "data" of a QStandardItemModel. For example:
struct TestStruct { std::vector<int> testVector; void addNumber(int i){ //this method will modify the member vector } }; Q_DECLARE_METATYPE(TestStruct) QStandardItemModel* model = QStandardItemModel(1,1); QModelIndex index = model->index(0,0); TestStruct test; test.addNumber(1); model->setData(index, qVariantFromValue(test)); With that, I will effectively have added a std::vector with the number 1 to the index {0,0} of the model. But how would I add another number to that TestStruct's vector from places that don't have access to the TestStruct instance anymore?
The "data" function returns a QVariant that can be casted as a TestStruct but it's a copy and I need a reference... get it?
Solution:1
Yes it will return the value only and not it's reference.
A workaround for this is, you can get the struct by Typecasting the QVariant. Then modify your testVector.
After modifications, call again
model->setData(index, qVariantFromValue(newTest)); where newTest is your struct with the modified Vector.
Hope it helps.
Note:If u also have question or solution just comment us below or mail us on toontricks1994@gmail.com
EmoticonEmoticon