/// <summary>
/// Helper method for EvalTriggers().
/// </summary>
/// <param name="type">Type of trigger to search for.</param>
/// <param name="stateIfTrue">Reference to the visual state variable to update (if the trigger occurs).</param>
private void ApplyCondition(VisualStateTriggerTypes type, ref TState stateIfTrue)
{
foreach (VisualStateTrigger <TState> trigger in Triggers.Where(x => x.Type == type))
{
if (trigger != null)
{
Rectangle bounds = (trigger.Bounds != Rectangle.Empty) ? trigger.Bounds : Control.ClientRectangle;
bool inRect = bounds.Contains(Control.PointToClient(Cursor.Position));
bool other = true;
switch (type)
{
case VisualStateTriggerTypes.Focused:
other = Control.Focused;
inRect = true;
break;
case VisualStateTriggerTypes.Pushed:
other = (Control.MouseButtons & MouseButtons.Left) == MouseButtons.Left;
break;
}
if (other && inRect)
{
stateIfTrue = trigger.State;
}
}
}
}
/// <summary>
/// Initialises a new instance of the VisualStateTrigger class.
/// </summary>
/// <param name="type">Type of trigger.</param>
/// <param name="state">Visual state applied when the trigger occurs.</param>
/// <param name="bounds">Bounds within which the trigger applies.</param>
public VisualStateTrigger(VisualStateTriggerTypes type, TState state, Rectangle bounds = default(Rectangle), AnchorStyles anchor = AnchorStyles.Top | AnchorStyles.Left)
{
Type = type;
State = state;
Bounds = bounds;
Anchor = anchor;
}
/// <summary>
/// Short-hand method for adding a state change trigger.
/// </summary>
/// <param name="type">Type of trigger.</param>
/// <param name="state">Visual state applied when the trigger occurs.</param>
/// <param name="bounds">Bounds within which the trigger applies.</param>
/// <param name="anchor">How the bounds are anchored to the control.</param>
public void AddTrigger(VisualStateTriggerTypes type, TState state, Rectangle bounds = default(Rectangle), AnchorStyles anchor = AnchorStyles.Top | AnchorStyles.Left)
{
Triggers.Add(new VisualStateTrigger <TState>(type, state, bounds, anchor));
}
