Memory leaks from QTableView + QStandardItemModel

Maciek0

Hello.
I create TableView object with model from QStandardItemModel. Model use QSqlQuery result. In First column in any cell il add button with menu (I add some actions to menu). I want ask howto to menage memory in TableView from this example ? How to clear memory from model and his cells widgets when il load new query data ?

JonB

@Maciek0
You don't have to worry about the views/widgets. You just refill your model with a new query's results, the QTableView will see that and will get rid of any existing stuff and update to just show what is in the model now.

VRonin

@Maciek0 said in Memory leaks from QTableView + QStandardItemModel:

il add button with menu

How? if your answer is setIndexWidget then bin it and subclass a delegate instead

Maciek0

@VRonin
Excactly I use setIndexWidget , and memory horrible expand when I add new, the same query result.

VRonin

@Maciek0 said in Memory leaks from QTableView + QStandardItemModel:

and memory horrible expand when I add new

Indeed! that's why setIndexWidget is evil incarnate.

What you need to do is subclass QStyledItemDelegate and reimplement its functionalities

qwasder85

It's the classic conundrum of "I want to see a widget in each cell, but I don't want them in the memory". I've been over this issue with my product owners so many times.
Change your approach or find a compromise, this road will only end in tears.

Maybe its enough to only show the button in the currently selected row? Write a custom delegate and have it display the button as its editor widget.
Then make sure that the cell is forced into edit mode when the row is selected.

VRonin

One middle way between efficiency and ease of use is something like this: https://pastebin.com/XrppLZ3m