internal void InvokeImpl(FrameworkElement stateTarget)
{
if (stateTarget != null)
{
VisualStateUtilities.GoToState(stateTarget, this.StateName, this.UseTransitions);
}
}
private void Evaluate()
{
if (this.TargetObject != null)
{
string stateName = null;
if (ComparisonLogic.EvaluateImpl(this.Binding, ComparisonConditionType.Equal, this.Value))
{
stateName = this.TrueState;
}
else
{
stateName = this.FalseState;
}
VisualStateUtilities.GoToState(this.TargetObject, stateName, true);
}
}
/// <summary>
/// Called when the target changes. If the TargetName property isn't set, this action has custom behavior.
/// </summary>
/// <param name="oldTarget"></param>
/// <param name="newTarget"></param>
/// <exception cref="InvalidOperationException">Could not locate an appropriate FrameworkElement with states.</exception>
protected override void OnTargetChanged(FrameworkElement oldTarget, FrameworkElement newTarget)
{
base.OnTargetChanged(oldTarget, newTarget);
FrameworkElement frameworkElement = null;
if (string.IsNullOrEmpty(this.TargetName) && !this.IsTargetObjectSet)
{
VisualStateUtilities.TryFindNearestStatefulControl(this.AssociatedObject as FrameworkElement, out frameworkElement);
}
else
{
frameworkElement = this.Target;
}
this.StateTarget = frameworkElement;
}
internal void InvokeImpl(FrameworkElement stateTarget)
{
if (stateTarget != null &&
!string.IsNullOrEmpty(this.ActiveState) &&
!string.IsNullOrEmpty(this.InactiveState) &&
!string.IsNullOrEmpty(this.TargetScreen))
{
UserControl screen = stateTarget
.GetSelfAndAncestors()
.OfType <UserControl>()
.FirstOrDefault(control => control.GetType().ToString() == this.TargetScreen);
string stateName = this.InactiveState;
if (screen != null)
{
stateName = this.ActiveState;
}
if (!string.IsNullOrEmpty(stateName))
{
ToggleButton toggleButton = stateTarget as ToggleButton;
if (toggleButton != null)
{
switch (stateName)
{
case "Checked":
toggleButton.IsChecked = true;
return;
case "Unchecked":
toggleButton.IsChecked = false;
return;
}
}
if (stateName == "Disabled")
{
stateTarget.IsEnabled = false;
return;
}
VisualStateUtilities.GoToState(stateTarget, stateName, true);
}
}
}
/// <summary>
/// Called when the target changes. If the TargetName property isn't set, this action has custom behavior.
/// </summary>
/// <param name="oldTarget"></param>
/// <param name="newTarget"></param>
/// <exception cref="InvalidOperationException">Could not locate an appropriate FrameworkElement with states.</exception>
protected override void OnTargetChanged(FrameworkElement oldTarget, FrameworkElement newTarget)
{
base.OnTargetChanged(oldTarget, newTarget);
FrameworkElement frameworkElement = null;
if (string.IsNullOrEmpty(this.TargetName) && !this.IsTargetObjectSet)
{
bool successful = VisualStateUtilities.TryFindNearestStatefulControl(this.AssociatedObject as FrameworkElement, out frameworkElement);
if (!successful && frameworkElement != null)
{
throw new InvalidOperationException();
}
}
else
{
frameworkElement = this.Target;
}
this.StateTarget = frameworkElement;
}
