How to get this Qt state machine to work? (two way button)

houmingc

I would want the ui->pushbutton to toggle between 2 states continuously.
The below code compiles success but it is not doing anything.

@
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QtGui>
#include <QState>
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);

QStateMachine machine;

QState *off=new QState();
off->assignProperty((ui->pushButton),"text","Off");
off->setObjectName("off");

QState *on=new QState();
on->setObjectName("on");
on->assignProperty((ui->pushButton),"text","On");


off->addTransition((ui->pushButton),SIGNAL(clicked()),on);
on->addTransition((ui->pushButton),SIGNAL(clicked()),off);

machine.addState(off);
machine.addState(on);

machine.setInitialState(off);
machine.start();

}

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

Edit (Gerolf): please use code markup langauge

houmingc

@
#include "mainwindow.h"

#include "ui_mainwindow.h"

#include <QtGui>

#include <QState>

MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{

ui->setupUi(this);
QStateMachine machine;

QState *off=new QState();
off->assignProperty((ui->pushButton),"text","Off");
off->setObjectName("off");

QState *on=new QState();
on->setObjectName("on");
on->assignProperty((ui->pushButton),"text","On");

off->addTransition((ui->pushButton),SIGNAL(clicked()),on);
on->addTransition((ui->pushButton),SIGNAL(clicked()),off);
machine.addState(off);
machine.addState(on);

machine.setInitialState(off);
machine.start();
}

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

Edit (Gerolf): please use code markup langauge

houmingc

can someone write a simple switch case statemachine in Qt language? I am learning Qt state machine.

I saw it is possible in below MovePlayer Function Member
http://qt-project.org/doc/qt-4.8/statemachine-rogue-window-cpp.html

houmingc

hi
I follow the below workable link, they are very detail and presents beginner a clear understanding of Qt Statemachine

http://ppkl.net/documentation/qt/statemachine-api.html
http://doc.qt.digia.com/4.6/statemachine-api.html

giesbert

Hi,

I am sure the problem is simple:

You create the statemachine as local variable in the constructor.
This means, when the constructor exists, the state machine is destroyed.
make it a member of the class.