public static IObservable <MouseButtonEventArgs> MouseClick(this DependencyObject that)
{
UIElement ui = (UIElement)that;
bool isIn = false;
return(Observable.Merge(
that.MouseDown()
.Where(x => x.ChangedButton == MouseButton.Left)
.Do(x =>
{
isIn = true;
ui.CaptureMouse();
})
.Where(x => false) // don't select mouse down
, that.LostMouseCapture()
.Do(x => { isIn = false; })
.Where(x => false) // don't select that!
// event to return
, that.MouseUp()
.Where(x => x.ChangedButton == MouseButton.Left && isIn)
.Do(x => ui.ReleaseMouseCapture())
.Where(x => that.Contains(x.Source as DependencyObject))
)
.Select(x => (MouseButtonEventArgs)x));
}
public static IObservable <Tuple <MouseButtonEventArgs, int> > MouseClicks(this DependencyObject that, TimeSpan interval)
{
// trying to avoid "new (ReferenceType)" as much as possible
UIElement ui = (UIElement)that;
int count = 0;
long tInterval = interval.Ticks / 2; // time between clicks is half a double click!
long t0 = 0, tLast = 0;
bool isIn = false;
return(Observable.Merge(
that.MouseDown()
.Where(x => x.ChangedButton == MouseButton.Left)
.Do(x =>
{
isIn = true;
tLast = DateTime.Now.Ticks;
ui.CaptureMouse();
})
.Where(x => false) // don't select mouse down
, LostMouseCapture(ui)
.Do(x => { isIn = false; })
.Where(x => false) // don't select that!
// event to return
, that.MouseUp()
.Where(x => x.ChangedButton == MouseButton.Left && isIn)
.Do(x => ui.ReleaseMouseCapture())
.Where(x => that.Contains(x.Source as DependencyObject))
)
// no transform mouse up events
.Select(x =>
{
var e = (MouseButtonEventArgs)x;
count++;
var tNow = DateTime.Now.Ticks;
// multi click test
if (count > 1 && tNow > t0 + count * tInterval)
{
t0 = tLast;
count = 1;
}
return Tuple.Create(e, count);
}));
}
