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digitalmars.D.learn - GtkD ListG Howto?

reply Ron Tarrant <rontarrant gmail.com> writes:
Hi all,

I'm trying to add an icon list to a GTK Window using 
setIconList(), but what the function expects is a ListG of 
Pixbufs.

The way I understand it, I have to instantiate the Pixbufs, build 
a ListG of void pointers to the Pixbufs, and pass that to 
setIconList().

Here is how I assume this process would play out:

```

Pixbuf airportImage1, airportImage2, airportImage3, airportImage4;
void * image1, image2, image3, image4;

airportImage1 = new Pixbuf("images/airport_25.png");
airportImage2 = new Pixbuf("images/airport_35.png");
airportImage3 = new Pixbuf("images/airport_60.png");
airportImage4 = new Pixbuf("images/airport_100.png");
image1 = &airportImage1;
image2 = &airportImage2;
image3 = &airportImage3;
image4 = &airportImage4;

ListG listG = null;
	
listG = listG.append(image1);
listG = listG.append(image2);
listG = listG.append(image3);
listG = listG.append(image4);

setIconList(listG);

```

But this, although it compiles, just dies when it hits all those 
append() statements.

Would someone please tell me where I'm going off track?
Oct 11 2019
parent reply mipri <mipri minimaltype.com> writes:
On Friday, 11 October 2019 at 19:53:33 UTC, Ron Tarrant wrote:

 Pixbuf airportImage1, airportImage2, airportImage3, 
 airportImage4;
 void * image1, image2, image3, image4;

 airportImage1 = new Pixbuf("images/airport_25.png");
 airportImage2 = new Pixbuf("images/airport_35.png");
 airportImage3 = new Pixbuf("images/airport_60.png");
 airportImage4 = new Pixbuf("images/airport_100.png");
 image1 = &airportImage1;
 image2 = &airportImage2;
 image3 = &airportImage3;
 image4 = &airportImage4;

 ListG listG = null;
 


I get the segfault to go away with

   ListG list = new ListG(null);

which is usage you can find in APILookupGLib.txt


 listG = listG.append(image1);
 listG = listG.append(image2);
 listG = listG.append(image3);
 listG = listG.append(image4);

 setIconList(listG);
Oct 11 2019
parent Ron Tarrant <rontarrant gmail.com> writes:
On Friday, 11 October 2019 at 20:40:25 UTC, mipri wrote:


 I get the segfault to go away with

   ListG list = new ListG(null);

 which is usage you can find in APILookupGLib.txt


Ah! Thanks, mipri. I didn't think to read through the unit tests.
Oct 11 2019