/// <summary> /// Gets the <see cref="VisualStateTransitionKey"/> which corresponds to the specified transition, if the appropriate /// visual states and transitions are defined within this group. /// </summary> /// <param name="from">The visual state which is being transitioned from.</param> /// <param name="to">The visual state which is being transitioned to.</param> /// <param name="key">The visual state transition key which was created.</param> /// <param name="transitionMustExist">A value indicating whether the specifiied transition must exist in order for a key to be created.</param> /// <returns><see langword="true"/> if the visual state transition key was created; otherwise, <see langword="false"/>.</returns> private Boolean GetVisualStateTransitionKey(VisualState from, VisualState to, out VisualStateTransitionKey key, Boolean transitionMustExist) { key = new VisualStateTransitionKey(from, to); if (transitionMustExist && !transitions.ContainsKey(key)) { key = new VisualStateTransitionKey(null, to); if (transitionMustExist && !transitions.ContainsKey(key)) { key = default(VisualStateTransitionKey); return(false); } } return(true); }
/// <summary> /// Gets the <see cref="VisualStateTransitionKey"/> which corresponds to the specified transition, if the appropriate /// visual states and transitions are defined within this group. /// </summary> /// <param name="from">The visual state which is being transitioned from.</param> /// <param name="to">The visual state which is being transitioned to.</param> /// <param name="key">The visual state transition key which was created.</param> /// <param name="transitionMustExist">A value indicating whether the specifiied transition must exist in order for a key to be created.</param> /// <returns><see langword="true"/> if the visual state transition key was created; otherwise, <see langword="false"/>.</returns> private Boolean GetVisualStateTransitionKey(String from, String to, out VisualStateTransitionKey key, Boolean transitionMustExist) { var vsFrom = (VisualState)null; if (from != null) { vsFrom = Get(from); if (vsFrom == null) { key = default(VisualStateTransitionKey); return(false); } } var vsTo = Get(to); if (vsTo == null) { key = default(VisualStateTransitionKey); return(false); } return(GetVisualStateTransitionKey(vsFrom, vsTo, out key, transitionMustExist)); }