call variable from other function

Hi.

Im declared one variable in ui.h:

Code:

---

class Ui_MainWindow
{
public:
    QWidget *centralwidget;
    QPushButton *pushButtonOpen;
    QPushButton *pushButtonClose;
    QLabel *label;
..........
}

---

and I need call from function.cpp and this say on compile: "'label' undeclared"
Im include ui.h in function.cpp but is the same!

Any help?.

Thz

waly

It is really hard to say what your actual problem is with your limited example... but I would make sure that your "label" variable is scoped correctly when you are using it and that <QLabel> is included some how in your ui.h.

You need

Code:

---

#include <QLabel>

---

in top of MainWindow.cpp
and

Code:

---

ui.label->setText("It's OK now!");

---

somewhere you need ))

Is by any chance that ui.h the result of uic?
Because you can't modify that directly. It will get overwritten every time you modify it in Designer.

Regards

I warmly suggest reading: Using a Component in Your Application.

it's code for example:

ui.h:

Code:

---

#ifndef UI_GUI_H
#define UI_GUI_H
 
#include <QtCore/QVariant>
#include <QtGui/QAction>
#include <QtGui/QApplication>
#include <QtGui/QButtonGroup>
#include <QtGui/QLabel>
#include <QtGui/QMainWindow>
#include <QtGui/QMenuBar>
#include <QtGui/QPushButton>
#include <QtGui/QWidget>
 
class Ui_MainWindow
{
public:
    QWidget *centralwidget;
    QPushButton *pushButtonOpen;
    QPushButton *pushButtonClose;
    QLabel *label;
    QMenuBar *menubar;
 
    void setupUi(QMainWindow *MainWindow)
    {
	.....
    label = new QLabel(centralwidget);
    label->setObjectName(QString::fromUtf8("label"));
    label->setGeometry(QRect(60, 100, 46, 14));
	.......
 
    retranslateUi(MainWindow);
    //QObject::connect(pushButtonOpen, SIGNAL(clicked()), label, SLOT(clear()));
 
    QMetaObject::connectSlotsByName(MainWindow);
    } // setupUi
 
    void retranslateUi(QMainWindow *MainWindow)
    {
	........
    label->setText(QApplication::translate("MainWindow", "TextLabel", 0, QApplication::UnicodeUTF8));
    Q_UNUSED(MainWindow);
    } // retranslateUi
 
};
 
namespace Ui {
    class MainWindow: public Ui_MainWindow {};
} // namespace Ui
 
#endif // UI_GUI_H

---

main.cpp:

Code:

---

#include <QtGui>
#include <QApplication>
 
#include "ventana.h"
 
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
 
    intervalo = 0;
 
    Ventana widget;
    widget.show();
 
    return app.exec();
}

---

ventana.h:

Code:

---

#include "ui.h"
 
class Ventana : public QMainWindow, private Ui::MainWindow
{
	Q_OBJECT
 
	public:
	    Ventana();
 
	public slots:
		void Bopen();
		void Bclose();
};

---

ventana.cpp:

Code:

---

#include <QtGui>
#include "ventana.h"
#include "function.h"
 
Ventana::Ventana()
{
    setupUi(this);
 
    connect(pushButtonOpen, SIGNAL(clicked()), this, SLOT(Bopen()));
    connect(pushButtonClose, SIGNAL(clicked()), this, SLOT(Bclose()));    
}
 
void Ventana::Bclose(){
	label->setText(QString("CloseOk"));
        functionDoSomething();
}
 
void Ventana::Bopen(){
    label->setText(QString("OpenOK"));      
}

---

From HERE im call label->setText();
But say is undeclared.

function.cpp:

Code:

---

#include <QtGui>
#include "function.h"
 
void functionDoSomething(){
       //here call to Qlabel
       label->setText(QString("HELLO WORLD"));
}

---

function.h:

Code:

---

void functionDoSomething();

---

you cannot add any members there.
Do it in designer, and uic will put them there.

Regards

Quote:

---

Originally Posted by marcel

you cannot add any members there.
Do it in designer, and uic will put them there.

Regards

---

Im not understand!! :(
:confused: