I think you might need to call SymbolArray>>intialize by your self. If you look at the chain of message sends starting from 'SymbolArray new' 1) OrderedCollection new 2) OrderedCollection new: 3) Behavior basicNew
There is no call to initialize. On Sat, Nov 7, 2009 at 16:28, Christine Wolfe <cwd...@earthlink.net> wrote: > I want to put add an imageMorph on top of another imageMorph. > > > > I can do this with the following method (note SymbolBlank is an imageMorph > > MyBoard>>addSymbol > > |im| > > im := SymbolBlank new. > > self addMorph: im. > > im topLeft: 2...@2. > > > > I want to enhance this so I can choose one of a collection of imageMorphs > to add. > > > > I created a class, SymbolArray, that is a subclass of OrderedCollection > with the following initialize method. Each of the items I’m adding > (SymbolBlank, SymbolGet, etc) is an imageMorph. > > > > SymbolArray>>initialize > > super initialize. > > self add: SymbolBlank new. > > self add: SymbolGet new. > > self add: SymbolProcess new. > > self add: SymbolPut new. > > self add: SymbolIf new. > > self add: SymbolWhile new. > > > > Then I tried to modify the addSymbol method as show below. > > When I do, I get the following error message which sounds like I don’t have > an element at index 1… > > SymbolArray(OrderedCollection)>>errorNoSuchElement > > SymbolArray(OrderedCollection)>>at: > > > > | sa si | > > sa := SymbolArray new. > > si := sa at: 1. > > self addMorph: si. > > si topLeft: 2...@2. > > > > I hope someone can help me figure out how to accomplish what I want to do. > > > > _______________________________________________ > Beginners mailing list > Beginners@lists.squeakfoundation.org > http://lists.squeakfoundation.org/mailman/listinfo/beginners > >
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