If I created any widget something like QPushButton* btn= new QPushButton("Text",this); then does parent widget completely destroys all children widgets or just removes them from it`s internal list?
Should I just use delete btn; or I need to use btn->deleteLater(); to completely destroy it? What the difference between this fundtions?
>Solution :
does parent widget completely destroys all children widgets or just removes them from it`s internal list?
The parent widget will destroy all children widgets. From the
QWidget::QWidget(QWidget *parent = nullptr, Qt::WindowFlags f = Qt::WindowFlags()) documentation:
QWidget -> QAbstractButton -> QPushButton
If parent is
nullptr, the new widget becomes a window. If parent is another widget, this widget becomes a child window inside parent. The new widget is deleted when its parent is deleted.