Passing Object as Argument of diffrent Class to a Function

[praveen0991kr]

Hello All,
I have a peice of code that I want to compress , I want to pass diffrent class object to a function and use Unknow object of class to access a Slot ;

THis is my code
@
case 84: myhmi84->show(); qDebug()<<"opening Screen C";
if((ClsAUpdtr->isActive()) == true){
delete ClsAUpdtr;
ClsBUpdtr = new QTimer();
connect(ClsBUpdtr,SIGNAL(timeout()),myhmi84,SLOT(updtScr()));
ClsBUpdtr->start(500);
}else{
if(ClsBUpdtr->isActive()){
delete ClsBUpdtr;
}
ClsAUpdtr = new QTimer();
connect(ClsAUpdtr,SIGNAL(timeout()),myhmi84,SLOT(updtScr()));
ClsAUpdtr->start(500);
}
Del->start(10);
break;
case 50: myhmi87->show(); qDebug()<<"opening Screen C";
if((ClsAUpdtr->isActive()) == true){
delete ClsAUpdtr;
ClsBUpdtr = new QTimer();
connect(ClsBUpdtr,SIGNAL(timeout()),myhmi87,SLOT(updtScr()));
ClsBUpdtr->start(500);
}else{
if(ClsBUpdtr->isActive()){
delete ClsBUpdtr;
}
ClsAUpdtr = new QTimer();
connect(ClsAUpdtr,SIGNAL(timeout()),myhmi87,SLOT(updtScr()));
ClsAUpdtr->start(500);
}
Del->start(10);
case X:

@
There are two cases I have written and I have 200 CASE so i want to make function in which I will pass object and will do further process;
@
//Class MYHMI84 *myhmi84; // In .h file
//Class MYHMI87 *myhmi87; // In .h file

// I want to Write like That IS it Possible
eg:
case 84: myhmi84->show();
Function(myhmi84);
break;
case 50: myhmi87->show();
Function(myhmi87);
break;
case X:

---

---

---

void Class X::Function(ClassAny *obj){
if((ClsAUpdtr->isActive()) == true){
delete ClsAUpdtr;
ClsBUpdtr = new QTimer();
connect(ClsBUpdtr,SIGNAL(timeout()),obj,SLOT(updtScr()));
ClsBUpdtr->start(500);
}else{
if(ClsBUpdtr->isActive()){
delete ClsBUpdtr;
}
ClsAUpdtr = new QTimer();
connect(ClsAUpdtr,SIGNAL(timeout()),obj,SLOT(updtScr()));
ClsAUpdtr->start(500);
}
Del->start(10);
}

@

Thanks
Praveen Kumar

[Binary91]

I know two possibilities to manage this:
1.: You create a "parent" class that is inerited by your subclasses (200), so you can use a pointer to parent in your parameter list and downcast in your function body...

2.: (less good method): You use a void* pointer...

[praveen0991kr]

Hi ,

Write Now I am doing like that :
@

namespace Ui {
class Offline;
}
class hmiscr01;
class hmiscr02;
class hmiscr03;
class hmiscr04;
class hmiscr42;
class hmiscr43;

---

---

/*CLASS DECLARATION/
class Offline : public QMainWindow
{
Q_OBJECT

public:
explicit Offline(QWidget parent = 0);
~Offline();
/FRIEND CLASS***/
friend class hmiscr01;
friend class hmiscr02;
friend class hmiscr03;
friend class hmiscr04;
friend class hmiscr42;

---

---

some timer;
some public slots;
some private slots:

}
@
Could u suggest out of this .h File from this class I am handling all class.

Praveen

[Binary91]

Hi,
what I mean with "subclassing" is creating classes that inherit from the main (parent) class.

Example:
@
// main.h

class Offline
{
private:
//private members which are used later in EVERY of your child classes (200)
public:
Offline(QWidget *parent = 0);
//public members which are used later in EVERY of your child classes (200)
};

class hmiscrXX : public Offline
{
private:
//public members which are used in your specific child classes (XX) (200)
public:
hmiscrXX(QWidget parent = 0);
//public members which are used in your specific child classes (XX)
};@
Your function has to look like that:
@ //main.cpp
void function doSomethingWithObjects(Offline hmiscr)
{
hmiscrXX* objhmiscrXX = qobject_cast<hmiscrXX*> (hmiscr); // downcasting hmiscr (which actually is a pointer to an object of type Offline) to your needed subclass hmiscrXX

// do stuff
}@

Hope that gives you an imagination of how I meant it...