Re: GTKD - CSS class color "flash" delay

[Mike Wey via Digitalmars-d-learn]

On 06/25/2016 05:26 PM, TheDGuy wrote:
On Saturday, 25 June 2016 at 13:01:09 UTC, TheDGuy wrote:
Thanks for your answer.
I have to pass the Button object to my timeout function to change the
CSS class. But how do i do that within the Timeout constructor?

I mean:

I have to pass my function and delay time to the constructor, but i
can't pass any data to the function here, also only functions are
allowed (at least it looks like that to me) who don't have parameters.

If i want to add a new function i have to use the function .add(), with
this function i can pass 'userData' (so my button for example). But why
am i unable to do that in the constructor? Do i have 2 different
functions for the same thing, one with the other one without parameter?

My current approach:

    private void letButtonsFlash(){
        foreach(Button btn;bArr){
            btn.setSensitive(false);
        }
        for(int i = 0; i < level; i++){
            Button currentButton = bArr[rndButtonBlink[i]];
            ListG list = currentButton.getStyleContext().listClasses();
            string CSSClassName = to!string(cast(char*)list.next().data);
            currentButton.getStyleContext().addClass(CSSClassName ~
"-flash");
            //writeln(CSSClassName);
            Timeout t = new Timeout(&timeout_delay,5,false); //error
appears here
            t.add(5,&timeout_delay,currentButton);
        }
        foreach(Button btn;bArr){
            btn.setSensitive(true);
        }
    }
    bool timeout_delay(Button currentButton){
        ListG list = currentButton.getStyleContext().listClasses();
        string CSSClassName = to!string(cast(char*)list.next().data);
        currentButton.getStyleContext().removeClass(CSSClassName ~
"-flash");
        return false;
    }

But i get the error:
Error: none of the overloads of '__ctor' are callable using argument
types (bool delegate(void* userData), int, bool), candidates are:
glib.Timeout.Timeout.this(uint interval, bool delegate() dlg, bool
fireNow = false)
glib.Timeout.Timeout.this(uint interval, bool delegate() dlg, GPriority
priority, bool fireNow = false)
glib.Timeout.Timeout.this(bool delegate() dlg, uint seconds, bool
fireNow = false)
glib.Timeout.Timeout.this(bool delegate() dlg, uint seconds, GPriority
priority, bool fireNow = false)

If i take a look at GTK for C it looks like there is a function for that:

http://www.gtk.org/tutorial1.2/gtk_tut-17.html

Why is this so confusing?

The constructor accepts an delegate, witch can access it's context so it 
has access to some of the data.

The functions from GTK are also available like Timeout.add from the 
linked tutorial: http://api.gtkd.org/src/glib/Timeout.html#Timeout.add


You may want to do something like this:

```
private void letButtonsFlash()
{
    foreach(Button btn;bArr){
        btn.setSensitive(false);
    }

    Timeout t = new Timeout(&timeout_delay,5,false);
}

private bool timeout_delay()
{
    for(int i = 0; i < level; i++){
        Button currentButton = bArr[rndButtonBlink[i]];
        ListG list = currentButton.getStyleContext().listClasses();
        string CSSClassName = to!string(cast(char*)list.next().data);
        currentButton.getStyleContext().addClass(CSSClassName ~ "-flash");
    }

    return false;
}

```

--
Mike Wey