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#include <QApplication>
#include <mainwindow.h>

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    MainWindow fenster;
    fenster.show();
    return app.exec();
}

Code: Alles auswählen

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
class QPushButton;
class QWidget;
class QLabel;
class QVBoxLayout;

class MainWindow : public QMainWindow
{
    Q_OBJECT

    public:
        MainWindow();

    private slots:
        void Fbutton1();
        void Fbutton2();
       
    private:
        QPushButton *button1, *button2;
        QWidget *anzeige, *mainwg;
        QLabel *label;
        QVBoxLayout *anzeigelayout;
};

#endif

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#include <QtGui>
#include "mainwindow.h"

MainWindow::MainWindow()
{
    button1 = new QPushButton("Aktion1");
    connect(button1,SIGNAL(clicked()),this,SLOT(Fbutton1()));
   
    button2 = new QPushButton("Aktion2");
    connect(button2,SIGNAL(clicked()),this,SLOT(Fbutton2()));
   
    anzeige = new QWidget();
    anzeigelayout = new QVBoxLayout;
    anzeige->setLayout(anzeigelayout);
   
    mainwg = new QWidget();
    QHBoxLayout *mainlayout = new QHBoxLayout();
    mainlayout->addWidget(button1);
    mainlayout->addWidget(button2);
    mainlayout->addWidget(anzeige);
    mainwg->setLayout(mainlayout);
    setCentralWidget(mainwg);
}

void MainWindow::Fbutton1()
{
    QLayoutItem *child;
    while((child = anzeigelayout->takeAt(0)) != 0)
    {
        delete child;
    }
   
    for(int i=0;i<2;i++)
    {
        label = new QLabel("Testtext");
        anzeigelayout->addWidget(label);
    }
}

void MainWindow::Fbutton2()
{
    QLayoutItem *child;
    while((child = anzeigelayout->takeAt(0)) != 0)
    {
        delete child;
    }
   
    for(int i=0;i<1;i++)
    {
        label = new QLabel("Testtext");
        anzeigelayout->addWidget(label);
    }
}

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anzeigelayout->removeItem(child)

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anzeigelayout->invalidate();
MainWindow->update()