如何重画QTreeWidget？

Question

I have QTreeWidget . In which I'm adding new column dynamically on button click event using setHeaderLabels . This API add new column in TreeWidget but column is not visible in current TreeWidget area. It adds a scroll bar in TreeWidget . Therefore to view newly added column user has to scroll the tree. This my scenario but I don't want to scroll. I have used update() function even though its not showing new column. Is there any way to repaint the widget. Thank you !

Answer 1

Call

treeWidget->header()->setStretchLastSection(false);

at the initialization and

treeWidget->resizeColumnToContent(column);

each time your adding a column.

Answer 2

Looks like

resizeColumnToContents(int col)

will help you. (You should call it every time after adding new column)

Btw, don't forget to call

header()->setStretchLastSection(false)

on initialization of TreeView