protected Switch(IntPtr handle) : base(handle)
{
TrackLayer = new CAShapeLayer();
Button = new FabButton();
prepareTrack();
prepareButton();
prepareSwitchSize(SwitchSize.Default);
prepareSwitchStyle(SwitchStyle.LightContent);
prepareSwitchState(SwitchState.Off);
}
private void layoutSwitch()
{
if (TrackLayer == null)
{
TrackLayer = new CAShapeLayer();
}
if (Button == null)
{
Button = new FabButton();
}
nfloat w = 0;
switch (SwitchSize)
{
case SwitchSize.Small:
{
w = 30;
}
break;
case SwitchSize.Default:
{
w = 40;
}
break;
case SwitchSize.Large:
{
w = 50;
}
break;
}
nfloat px = (this.Width() - w) / 2f;
TrackLayer.Frame = new CGRect(px, (this.Height() - trackThickness) / 2f, w, trackThickness);
TrackLayer.CornerRadius = NMath.Min(TrackLayer.Frame.Height, TrackLayer.Frame.Width) / 2f;
Button.Frame = new CGRect(px, (this.Height() - buttonDiameter) / 2f, buttonDiameter, buttonDiameter);
onPosition = this.Width() - px - buttonDiameter;
offPosition = px;
if (internalSwitchState == SwitchState.On)
{
Button.SetX(onPosition);
}
}
void handleTouchUpOutsideOrCanceled(FabButton sender, UIEvent e)
{
var touches = e.TouchesForView(sender).ToArray <UITouch>();
if (touches == null)
{
return;
}
var v = touches[0];
if (v != null)
{
nfloat q = sender.X() + v.LocationInView(sender).X - v.PreviousLocationInView(sender).X;
SetSwitchState(q > (this.Width() - Button.Width()) / 2f ? SwitchState.On : SwitchState.Off, true);
}
}
void handleTouchDragInside(FabButton sender, UIEvent e)
{
var touches = e.TouchesForView(sender).ToArray <UITouch>();
if (touches == null)
{
return;
}
var v = touches[0];
if (v != null)
{
nfloat q = NMath.Max(NMath.Min(sender.X() + v.LocationInView(sender).X - v.PreviousLocationInView(sender).X, onPosition), offPosition);
if (q != sender.X())
{
sender.SetX(q);
}
}
}