Andre Poenitz wrote:
> On Thu, Mar 06, 2003 at 02:44:10PM +0000, Angus Leeming wrote:
>> // Lazy instatiation. Only build the thing when a particular
>> // dialog is requested.
>> Dialog * Dialogs::build(string const & name) {
>> if (!isValid(name))
>> return 0;
>>
>> Dialog * dialog = new Dialog;
>> if (name == "citation") {
>> dialog.setController(new ControlCitation(*dialog));
>> dialog.setView(new FormView(*dialog));
>
> But that's dynamic.
Sorry. That should be:
dialog.setView(new FormCitation(*dialog));
> If you want that, you can't use the
> ControlCitation type in the ViewCitation clas...
>
> This way a certain view can be coupled with any controler, so it
> can't possibly know the controler type at compile time.
Sure I can. However it requires that I write sane code. I could write
if (name == "citation") {
dialog.setController(new ControlCitation(*dialog));
dialog.setView(new FormTabular(*dialog));
}
which will compile fine. However FormTabular expects to see
ControlTabular & controller() {
dynamic_cast<ControlTabular&>(dialog().controller());
}
which fails at run time because the dialog actually has a
ControlCitation controller.
--
Angus
