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private:
   KlasseA *classA;  //abgeleitet von QWidget
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Code: Alles auswählen

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connect(pushbutton1, SIGNAL(clicked()), this, SLOT(button_slot1());)
connect(pushbutton2, SIGNAL(clicked()), this, SLOT(button_slot2()));
....

Code: Alles auswählen

void Mainwindow::button_slot1()
{
    classA = new KlasseA(this);
    setCentralWidget(classA);
}

Code: Alles auswählen

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "draglabel.h"


#include <QLabel>
#include <QTableView>
#include <QStandardItemModel>
#include <QDebug>




MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    //Toolbar Konfiguration
    ui->mainToolBar->setAllowedAreas(Qt::LeftToolBarArea);
    ui->mainToolBar->setIconSize(QSize(40,40));
    ui->mainToolBar->setMovable(false);
    a_b1 = new QAction(QIcon(":buttons/but1.ico"),"Platz", ui->mainToolBar);
    a_b2 = new QAction(QIcon(":buttons/but2.ico"),"Gruppen", ui->mainToolBar);
    a_b3 = new QAction(QIcon(":buttons/but3"),"Ergebnis", ui->mainToolBar);
    a_b1->setCheckable(true);
    a_b2->setCheckable(true);
    a_b3->setCheckable(true);
    ui->mainToolBar->addAction(a_b1);
    ui->mainToolBar->addAction(a_b2);
    ui->mainToolBar->addSeparator();
    ui->mainToolBar->addAction(a_b3);

    connect(a_b1, SIGNAL(triggered()), this, SLOT(but1_slot()));
    connect(a_b2, SIGNAL(triggered()), this, SLOT(but2_slot()));
    connect(a_b3, SIGNAL(triggered()), this, SLOT(but3_slot()));


   connect(ui->actionBeenden, SIGNAL(triggered()), this, SLOT(close()));
   group_w = new Group_W(list, this);
   group_w->hide();
   connect(group_w, SIGNAL(sendToMain(QList<Group_m*>)), this, SLOT(sendData(QList<Group_m*>)));

}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::but1_slot()
{
    //Ordnung in der Toolbar schaffen
    a_b2->setChecked(false);
    a_b3->setChecked(false);

    platz_w = new Platz_W(this);
    setCentralWidget(platz_w);

}

void MainWindow::but2_slot()
{
    //Ordnung in der Toolbar schaffen
    a_b1->setChecked(false);
    a_b3->setChecked(false);

    //group_w = new Group_W(list, this);
    setCentralWidget(group_w);

}

void MainWindow::but3_slot()
{
    //Ordnung in der Toolbar schaffen
    a_b1->setChecked(false);
    a_b2->setChecked(false);


    tview = new QTableView(this);

    setCentralWidget(tview);



}

void MainWindow::sendData(QList<Group_m*> group_list)
{
    list = group_list;
}

void MainWindow::sendData(Group_W *group)
{
    //group_w = group;
}

Code: Alles auswählen

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QToolButton>
#include "platz_w.h"
#include "draglabeldel.h"
#include "group_w.h"
#include "group_m.h"
#include <QStringList>

#include <QTableView>

namespace Ui {
    class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();

public slots:
    void but1_slot();
    void but2_slot();
    void but3_slot();

    void sendData(QList<Group_m*>);
    void sendData(Group_W*);
signals:
    void sendTheW(Group_W*);

private:
    Ui::MainWindow *ui;

    //**TOOLBUTTONS**//

    QAction *a_b1;
    QAction *a_b2;
    QAction *a_b3;

    //Widgets
    Platz_W *platz_w;
    QTableView *tview;
    Group_W *group_w;

    //GruppenListen***
    QList<Group_m*> list;



};

#endif // MAINWINDOW_H

Code: Alles auswählen

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

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    a.setStyle("plastique");
    MainWindow w;
    w.show();

    return a.exec();
}

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Group_W::~Group_W()
{
    delete ui;
    qDebug() << "bye";
}