public void Update(out bool cancelRing)
{
sliceActivated = false;
cancelRing = false;
Vector2 hitUV = Vector2.Zero;
Matrix invWorld = Matrix.Invert(worldMatrix);
// user clicked on me?
GraphicsDevice device = BokuGame.bokuGame.GraphicsDevice;
// Center on screen and just high enough to clear bottom help overlay text.
Vector2 screenSize = new Vector2(device.Viewport.Width, device.Viewport.Height);
int sliceIndex = -1;
for (int i = 0; i < TouchInput.TouchCount; i++)
{
TouchContact touch = TouchInput.GetTouchContactByIndex(i);
Vector2 touchPos = touch.position;
touchPos = touch.position - ScreenOffset;
hitUV = TouchInput.GetHitOrtho(touchPos, camera, ref invWorld, useRtCoords: false);
if (gotTouchBegan)
{
if (touch.phase == TouchPhase.Moved || touch.phase == TouchPhase.Stationary)
{
if (WithinPieRing(hitUV))
{
sliceIndex = GetSliceAtAngle(hitUV);
SetFocus(sliceIndex);
indexLastHoverItem = indexCurrentHoverItem;
}
}
else if (TouchGestureManager.Get().TapGesture.WasTapped()) //cancel?
{
float len = hitUV.Length();
if (len > outerRadius)
{
cancelRing = true;
sliceActivated = false;
}
}
// is this a group slice? open its pie!
if (!cancelRing && (touch.phase == TouchPhase.Ended))
{
if (WithinPieRing(hitUV))
{
sliceIndex = GetSliceAtAngle(hitUV);
if (sliceIndex > -1)
{
PieDisk nextDisk = slices[sliceIndex].subDisk;
if (nextDisk != null &&
nextDisk.SliceCount() > 0)
{
Object rootParent = Parent;
while ((rootParent as PieMenu) == null)
{
rootParent = (rootParent as PieDisk).Parent;
}
(rootParent as PieMenu).activeDisk = nextDisk;
(rootParent as PieMenu).focusedDiskNo++;
nextDisk.Visible = true;
nextDisk.ScreenPosition = touch.position;
nextDisk.BuildSlices();
}
else
{
indexPickedItem = sliceIndex;
sliceActivated = true;
}
}
else
{
Debug.Assert(false);// && "something unexpected failed here.");
}
}
}
else
{
sliceActivated = false;
}
}
if (touch.phase == TouchPhase.Began)
{
gotTouchBegan = true;
}
else if (touch.phase == TouchPhase.Ended)
{
gotTouchBegan = false;
}
}
if (TouchInput.TouchCount == 0)
{
indexCurrentHoverItem = -1;
SetFocus(sliceIndex);
}
if ((sliceIndex == -1))
{
indexCurrentHoverItem = -1;
SetFocus(sliceIndex);
indexLastHoverItem = -1;
}
}
