static member function

[freekill]

hi qt gurus..it's actually not my first time to present this problem although I had to redirect since I was going off board..anyway, I'm getting confused with my OOP. I'm not really used with having 2 .h files. But here in qt, I have to make my own .h and the other ui.h. here's the link to my previous post: Button-Controlled Loop Thread

Now, I checked my codes specifically the 2 header files that I have..According to Mr. Death I have to make a static function that would return a pointer to the object textEdit. How do I actually do it? I don't have any textEdit in the header that I made except for the ui header which was generated after I used Qt designer.

Something even confused me more. The ui header indicates "WARNING! All changes made in this file will be lost when recompiling ui file!"

I hope you could help me out.

[john_god]

Something even confused me more. The ui header indicates "WARNING! All changes made in this file will be lost when recompiling ui file!"

You cannot edit the ui_.h file as they are generated based on the ui file.
You shoul edit the looper.h and looper.cpp files. There should be a member pointer in the looper .h someething like 'm_ui' that would gave you access to the textedit, but I dont see it in your code.

[freekill]

I tried to absorb the idea of having a static member function which would handle my textEdit so that I could call the function even without instance of the class I made, basicLoop.

I recompiled and got this error message:
C: .../looper.cpp:18: undefined reference to 'basicLoop::textEdit'

class basicLoop : public QWidget, private Ui::looperDLG
{
    Q_OBJECT
 
public:
    basicLoop(QWidget *parent = 0);
    static void textEditAppend (int&);
 
public slots:
    void startLoop();
    void stopLoop();
 
private:
    static QTextEdit *textEdit;
};

class basicLoop : public QWidget, private Ui::looperDLG
{
    Q_OBJECT
 
public:
    basicLoop(QWidget *parent = 0);
    static void textEditAppend (int&);
 
public slots:
    void startLoop();
    void stopLoop();
    
private:
    static QTextEdit *textEdit;
};

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I'm not sure if I implemented the correct static data in my looper.h. I think this is the part that gives me the error. So how can I make Ui_looperDLG::textEdit be my static data?

I'm somehow getting lost with the idea of the UI header file. If I'm not on the right track, I hope you give give me some light. Thanks.

[nish]

you have to do it like this..

//header
class basicLoop : public QWidget, private Ui::looperDLG
{
 
private:
  static QTextEdit* te;//name it different than ui header
public:
  static QTextEdit* getTextEdit();
}
 
//cpp
#include <QtGui> 
 #include "looper.h"
 
 bool stop;
 void mainLoop();
 
QTextEdit* basicLoop::te=0;//MUST do it here globaly... 
 
 basicLoop::basicLoop(QWidget *parent)
 {
      setupUi(this); // this sets up GUI
 
 te= textEdit//This textEdit is inherited from ui  header
 }
 
 QTextEdit* basicLoop::gettextEdit()
 {
   return te;
  }

//header
class basicLoop : public QWidget, private Ui::looperDLG
{

private:
  static QTextEdit* te;//name it different than ui header
public:
  static QTextEdit* getTextEdit();
}

//cpp
#include <QtGui> 
 #include "looper.h"
 
 bool stop;
 void mainLoop();
 
QTextEdit* basicLoop::te=0;//MUST do it here globaly... 
 
 basicLoop::basicLoop(QWidget *parent)
 {
      setupUi(this); // this sets up GUI
  
 te= textEdit//This textEdit is inherited from ui  header
 }
 
 QTextEdit* basicLoop::gettextEdit()
 {
   return te;
  }

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now you can call the basicloop::gettextEdit() in your mainloop()...

this is not the best solution.. coz this assumes that you are using only single instance of basicloop... becoz everytime a new object of basicloop is created the textedit will change.. if you only use one instance of basicloop.. make it a singleton class.

[freekill]

Thanks finally got it working.