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Get children of QFileDialog derived class

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  • G Offline
    G Offline
    GrahamLa
    wrote on 6 Mar 2019, 11:46 last edited by
    #1

    Hi
    I have derived a class from QFileDialog -

    class PrintFileDialog : public QFileDialog
    {
    public:
    	PrintFileDialog(QWidget *parent);
    	~PrintFileDialog();
    
    	void func();
    };
    
    #include "PrintFileDialog.h"
    
    PrintFileDialog::PrintFileDialog(QWidget *parent)
    {
    }
    
    
    PrintFileDialog::~PrintFileDialog()
    {
    }
    
    void PrintFileDialog::func()
    {
    	QList<QObject*> widgets = this->children();
    	int a;
    	a = 10;
    
    }
    

    When func() is called the widgets list is empty.
    What is the correct way to do this

    Thanks

    J 1 Reply Last reply 6 Mar 2019, 12:58
    0
    • D Offline
      D Offline
      dheerendra
      Qt Champions 2022
      wrote on 6 Mar 2019, 12:28 last edited by
      #2

      Internal objects will not be created unless you call show or exec. Here you are calling in constructor. Hence you don't see the children.

      Dheerendra
      @Community Service
      Certified Qt Specialist
      http://www.pthinks.com

      1 Reply Last reply
      1
      • G GrahamLa
        6 Mar 2019, 11:46

        Hi
        I have derived a class from QFileDialog -

        class PrintFileDialog : public QFileDialog
        {
        public:
        	PrintFileDialog(QWidget *parent);
        	~PrintFileDialog();
        
        	void func();
        };
        
        #include "PrintFileDialog.h"
        
        PrintFileDialog::PrintFileDialog(QWidget *parent)
        {
        }
        
        
        PrintFileDialog::~PrintFileDialog()
        {
        }
        
        void PrintFileDialog::func()
        {
        	QList<QObject*> widgets = this->children();
        	int a;
        	a = 10;
        
        }
        

        When func() is called the widgets list is empty.
        What is the correct way to do this

        Thanks

        J Offline
        J Offline
        jsulm
        Lifetime Qt Champion
        wrote on 6 Mar 2019, 12:58 last edited by
        #3

        @GrahamLa Where and when do you call func()?

        https://forum.qt.io/topic/113070/qt-code-of-conduct

        1 Reply Last reply
        0

        3/3

        6 Mar 2019, 12:58

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