Model-view: Display items in different ways

[travlr]

[/code]Is this how this is "supposed" to be done, or should the roles instead be directly used, so that drawing draws something only if the node is of correct type?

//We have several ItemDataRoles defined
int TypeARole = 34;
int TypeBRole = 35;
 
drawNode( child.data( TypeARole ) ); //Draws a rectangle, but only for A-type nodes
drawNode( child.data( TypeBRole ) ); //Draws a circle but only for B-type nodes

//We have several ItemDataRoles defined
int TypeARole = 34;
int TypeBRole = 35;

drawNode( child.data( TypeARole ) ); //Draws a rectangle, but only for A-type nodes
drawNode( child.data( TypeBRole ) ); //Draws a circle but only for B-type nodes

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Or are there other better alternatives?

I'm guessing that this last piece of code is part of a custom view and not somehow part of the model...

I think your on the right track with your primary description of discriminating in the data() method. The only minor thing I do differently is contain the "type" in my item node instead of a custom role. Just a personal preference.

Mind you, I'm not an expert yet though. -travlr