XNA Hold screen to move object - windows-phone-7

Question

im working with windows phone game using xna... and looking a way to make my object to move with holding some rectangle that i made as a button on screen....
i already tried this but it just read tap gesture only
foreach (GestureSample gestureSample in input.Gestures)
{
switch (gestureSample.GestureType)
{
case GestureType.Hold:
case GestureType.Tap:
Point tapLocation = new Point((int)gestureSample.Position.X, (int)gestureSample.Position.Y);
if (rightRectangle.Contains(tapLocation))
{
rightTouched = true;
player.Catapult.CurrentState = CatapultState.MoveRight;
playerPositionUpdate.X += 20;
player.catapultPosition.X += 20;
player.Catapult.catapultPosition.X += 20;
player.Catapult.projectilePositionUpdate.X += 20;
if (player.Catapult.catapultPosition.X == player.Catapult.catapultPosition.X + 20)
rightTouched = false;
CenterOnPosition(player.Catapult.Position - catapultCenterOffset);
}
break;
}
}

Answer 1

Gestures are discrete events. You want to poll the state of the touch panel every frame. Use TouchPanel.GetState() for that.
See Working with Touch Input (Windows Phone) for information.

Answer 2

As mentioned above you shouldn't use GestureSample for that purpose, because using dragcomplete and freedrag a bit tricky. Instead you should code your own gestures using TouchPanel.GetState()
TouchCollection touchCollection = TouchPanel.GetState();
if (touchCollection.Count == 1)
{
var touch = touchCollection[0];
switch (touch.State)
{
case TouchLocationState.Pressed:
if (rectangle.Contains((int) touch.Position.X, (int) touch.Position.Y))
{
isMoving = true;
}
break;
case TouchLocationState.Moved:
if (isMoving)
{
TouchLocation prevLocation;
touch.TryGetPreviousLocation(out prevLocation);
if (prevLocation.Position != touch.Position)
{
Vector2 delta = touch.Position - prevLocation.Position;
//offset your rectangle on delta
}
}
break;
case TouchLocationState.Released:
isMoving = false;
break;
}
}
else if (touchCollection.Count == 2)
{
var touchOne = touchCollection[0];
var touchTwo = touchCollection[1];
//pinch logic here
}
I guess you understand the idea.