AttributeStepList

EditAttribute EditAttributeFromOrigin EditAttributeThenDestroyTarget StopEditingAttribute SwitchToStepList SwitchingStepLists

Attributes

AttributeWindow

Fields

instance AttributeStepList tag;
attributeWindow: nilObject;
end instance;

 
 
Define Class AttributeStepList;
    inherits from ObjectList;

    field attributeWindow:  AttributeWindow, weak, getter, setter;
        // used by AttributeWindow attribute

    operation EditAttribute(target: Object; redrawObject: Viewable; position: Dot), noFail;
        // call to show attribute window with these steps;
        // target is object being editted; redrawObject is (optional) object to be dirtied
        // when changes are accepted; position is spout position for window
    operation EditAttributeThenDestroyTarget(target: Object; redrawObject: Viewable; position: Dot), noFail;
        // first calls EditAttribute with same parameters
        // then calls AddDestroyableTarget on iAttributeStepListChain with <target>
    operation EditAttributeFromOrigin(target: Object; redrawObject: Viewable; fromObject: Viewable), safe, noFail;
        // call to show attribute window with these steps;
        // target is object being editted; redrawObject is (optional) object to be dirtied
        // when changes are accepted; spout position of window is origin of fromObject
    intrinsic StopEditingAttribute(stepList: AttributeStepList);
        // calls disappear on any on-screen attribute window using these steps
        // if <stepList> is nilObject, calls disappear on any on-screen attribute windows
        // override rarely
    operation SwitchToStepList(oldList: AttributeStepList; target: Object): AttributeWindow;
        // if new list uses different window than old list, position new window's spout
        // to match self, start processing the new step list, and return the new window;
        // otherwise set the target and return self; useful for Prev/NextStepList
    intrinsic SwitchingStepLists(): Boolean;
        // returns true if called while switching to another list
        // can be used to distinguish whether a window is closing because
        // steps are over or just because its switching to a different window
    attribute AttributeWindow: AttributeWindow;
        // window to display this list of steps in
end class;