ich habe versucht das Beispiel von QLineEdit und dem textChange evtn nachzubauen und erhalte trotzdem folgendes:
QObject::connect: No such signal QLineEdit::textChanged(const QString&)
QObject::connect: (sender name: 'unnamed')
QObject::connect: (receiver name: 'unnamed')
Code: Alles auswählen
/*************** question.cpp ************/
#include "question.h"
Iclass::Iclass(QWidget *, const char *)
{
myNextBtn = new QPushButton("Weiter >>",this);
myNextBtn->setGeometry(640,700,120,50);
myNextBtn->setFlat(true);
myNextBtn->setEnabled(false);
myNameEdt = new QLineEdit("",this);
myNameEdt->setGeometry(120,30,220,30);
QObject::connect(myNameEdt,SIGNAL(textChanged(const QString&)),this,SLOT(checkFill(const QString&)));
}
void Iclass::checkFill(const QString&)
{
if ( !myNameEdt->text().isEmpty() )
{
myNextBtn->setEnabled(true);
}
};
/*************** question.h ************/
#ifndef ICLASS_H
#define ICLASS_H
#include <qpushbutton.h>
#include <qlineedit.h>
class Iclass : public QWidget //create the class Iclass , copy the functions of QWidget
{
Q_OBJECT
public:
Iclass (QWidget *parent=0, const char *name=0);
~Iclass();
private:
QPushButton *myNextBtn;
QLineEdit *myNameEdt;
public slots:
void checkFill(const QString&);
};
#endif
