Unsolved Call a function from child
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Hello;
I would like to call a function from a child form by pressing a button, so I put these codes in my Main window form:void MainWindow::Test() { qDebug()<<"Hello World..."; }
And I put these codes in my Child form:
#include "mainwindow.h" void PicExpand::on_pushButton_clicked() { MainWindow* myMainwindow = qobject_cast<MainWindow*>(parent()); if (myMainwindow) { myMainwindow->Test(); } }
But, it doesn't work !
Thanks for helping.
MSD. -
@MSDQuick said in Call a function from child:
But, it doesn't work !
then probably the widget is not a parent of the MainWindow?!
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Hi,
To add to @raven-worx, what you are planning to do is bad design more specifically
tight coupling
. Why should the child know anything about its parent and furthermore call a function of it ?If you want your MainWindow to react to something happening in the child then you should use signals and slots.