basic question: getting value from qwidget and use it in mainapplication

hi :D

Please I am new in qt4 world:confused: My application is composed of a mainapplication window and a qwidget.
I want get the value qstring from the lineedit.text(); in the qwidget to use it in the main window. so Howto?:crying:

Refer
http://www.digitalfanatics.org/proje...chapter07.html

Hi

The tutorial presents QT3 but i need QT4 solution. I need just how to get information (qstrings or int) from a QDialog or Qwidget to use them in the main window.

there are lots of oss available in the links section, or the Qt Software section. go through those.

It's just a basic question of accessing a member variable's methods

What will you do in this situation

Code:

---

// Represents whatever widget 
class ClassIAmInterestedIn {
public:
    void tryToAccessMe();
}
 
 
// Represents Container Holding the widget ( Maybe a Dialog )
 
class IhaveObjectYouAreInterestedIn{
 
private:
   ClassIAmInterestedIn   objectOfThatClass; 
};
 
 
 
// You are working  in this class
class IAmHere {
public:
   void someMethod(){
         IhaveObjectYouAreInterestedIn obj;
         obj.doSomeThingInteresting();
 
        // Now there is achange in IhaveObjectYouAreInterestedIn::objectOfThatClass; 
       // and U will have to access objectOfThatClass::tryToAccessMe()
       // Fig out how to access  that
   }   
};

---

hi,

Do you want get data from QLineEdit box ?

the follwing function should return what ever lineedit box contains

QString displayText() and QString text();

more details ,refer Qt Assistant

If u want to get the value of text box from a QWidget to MainWindow,

declare an instance of QWidget say MyQWidget in ur MainWindow then u can get the value by MyQWidget->MyTextBox->text();

Or if u r doing all the things in designer(i.e. u r not creating any implementation header or source file) then the place where u r actually getting the text string, store this in an extern variable and access this extern variable in ur MainWindow.
But I would not recommend this approach, its better that u should create the implementation files for both ur QWidget and MainWindow, then implement the functionality there.