/// <summary>
/// Apply the default type style and the style-Property
/// </summary>
protected void ApplyStyle()
{
// gets the default type style, like this <Style x:key="{x:Type Button}"... />
var defaultStyle = Style.GetStyleResource(this.GetType());
// check whether a default type style exists and if exists
// the overridesdefaultstyle-property is false
// apply default style, if style isn't set or OverridesDefaultStyle-property is false
if (defaultStyle != null && (this.Style == null || !this.Style.OverridesDefaultStyle))
{
this.ApplyStyle(defaultStyle);
}
if (this.Style != null && defaultStyle != this.Style)
{
// apply style-property
this.ApplyStyle(this.Style);
}
this.Invalidate();
}
/// <summary>
/// check whether a trigger has been fired
/// </summary>
/// <param name="propertyName"></param>
void CheckTrigger(DependencyProperty dp)
{
var propTriggers = new List <Trigger> ();
if (this.Style != null)
{
foreach (var trig in this.Style.Triggers)
{
if (trig.Property == dp)
{
propTriggers.Add(trig);
}
}
}
if (this.Style == null || !this.Style.OverridesDefaultStyle)
{
// gets the default style based on the current type
var defaultStyle = Style.GetStyleResource(this.GetType());
if (defaultStyle != null)
{
// iterate triggers
foreach (var trig in defaultStyle.Triggers)
{
var count = propTriggers
.Where(p => p.Property.Name == trig.Property.Name)
.Count();
// check whether the trigger-property does not overwrite the default style
if (count == 0)
{
if (trig.Property == dp)
{
propTriggers.Add(trig);
}
}
}
}
}
if (propTriggers.Count > 0)
{
// get current property value
var propValue = this.GetCurrentValue(dp.Name);
foreach (var trig in propTriggers)
{
// check whether the trigger is active
var active = (trig.Value == null && propValue == null) ||
(trig.Value != null && trig.Value.Equals(propValue));
if (active)
{
// apply trigger
this.ApplyTrigger(trig);
// set trigger as active
this.SetTriggerState(trig, true);
}
else
{
// check whether a trigger has already been activated
if (this.IsActiveTrigger(trig))
{
// set trigger as disabled
this.SetTriggerState(trig, false);
// reset changed trigger-values
this.ResetTrigger(trig);
// reset stored values
this.ResetStoredValues(trig);
}
}
}
}
}
