Signal and slot related problem?

pratik041

Suppose in a single function i want to use the same button as a on off switch like. I mean when once i click the button a new window should open and when i again click the same button the same window should close.
@connect(button, SIGNAL(clicked()), window, SLOT(open()));
connect(button, SIGNAL(clicked()), window, SLOT(close()));@
Here, my problem is that if i will use signal and slot like the code given above the window will open and suddenly it will close because
both the signals are same so how can i solved it?

giesbert

you can create a custom slot and use a boolean member to do open/close, depending on the last actio

xeroblast

i think you could use something like this :

@
window::window() {
connect(button, SIGNAL(clicked()), this, SLOT(open()));
}
void window::open() {
disconnect(button, SIGNAL(clicked()), this, SLOT(open()));
connect(button, SIGNAL(clicked()), this, SLOT(close()));
}
void window::close() {
disconnect(button, SIGNAL(clicked()), this, SLOT(close()));
connect(button, SIGNAL(clicked()), this, SLOT(open()));
}
@

not tested yet though...

mlong

You could do
@
connect(button, SIGNAL(clicked()), window, SLOT(toggleOpenClose()));
@

with a window class which has something like
@

class Window ...
{
Q_OBJECT
...
public:
Window() { is_open = false; }

void open() { 
   // do opening stuff
   is_open = true;
}

void close() { 
   // do closing stuff
   is_open = false;
}

public slots:

    void toggleOpenClose()  {
       if (is_open) 
           close();
       else 
           open();
    }

private:
   bool is_open;

...
}
@

Edit: which is pretty much what Gerolf suggested above

pratik041

ok i will try that thank's