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Location: alysbrooks-public/games/isometric-park-fna/FNA/src/Input/Touch/TouchPanel.cs - annotation

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Commit Description:
Various UI improvements.
Commit Description:
Various UI improvements.
References:
r291:6a7d5e8510b1 default
File last commit:
r0:e33f209de7e5 default
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FNA/src/Input/Touch/TouchPanel.cs
233 lines | 4.7 KiB | text/x-csharp | CSharpLexer
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alys
Early working version (including all dependencies, lol).
 r0 #region License
/* FNA - XNA4 Reimplementation for Desktop Platforms
* Copyright 2009-2020 Ethan Lee and the MonoGame Team
*
* Released under the Microsoft Public License.
* See LICENSE for details.
*/
#endregion
#region Using Statements
using System;
using System.Collections.Generic;
#endregion
namespace Microsoft.Xna.Framework.Input.Touch
{
// https://msdn.microsoft.com/en-us/library/microsoft.xna.framework.input.touch.touchpanel.aspx
public static class TouchPanel
{
#region Internal Constants
// The maximum number of simultaneous touches allowed by XNA.
internal const int MAX_TOUCHES = 8;
// The value that represents the absence of a finger.
internal const int NO_FINGER = -1;
#endregion
#region Public Static Properties
public static int DisplayWidth
{
get;
set;
}
public static int DisplayHeight
{
get;
set;
}
public static DisplayOrientation DisplayOrientation
{
get;
set;
}
public static GestureType EnabledGestures
{
get;
set;
}
public static bool IsGestureAvailable
{
get
{
return gestures.Count > 0;
}
}
public static IntPtr WindowHandle
{
get;
set;
}
#endregion
#region Internal Static Variables
internal static bool TouchDeviceExists;
#endregion
#region Private Static Variables
private static Queue<GestureSample> gestures = new Queue<GestureSample>();
private static TouchLocation[] touches = new TouchLocation[MAX_TOUCHES];
private static TouchLocation[] prevTouches = new TouchLocation[MAX_TOUCHES];
private static List<TouchLocation> validTouches = new List<TouchLocation>();
#endregion
#region Public Static Methods
public static TouchPanelCapabilities GetCapabilities()
{
return FNAPlatform.GetTouchCapabilities();
}
public static TouchCollection GetState()
{
validTouches.Clear();
for (int i = 0; i < MAX_TOUCHES; i += 1)
{
if (touches[i].State != TouchLocationState.Invalid)
{
validTouches.Add(touches[i]);
}
}
return new TouchCollection(validTouches.ToArray());
}
public static GestureSample ReadGesture()
{
if (gestures.Count == 0)
{
throw new InvalidOperationException();
}
return gestures.Dequeue();
}
#endregion
#region Internal Static Methods
internal static void EnqueueGesture(GestureSample gesture)
{
gestures.Enqueue(gesture);
}
internal static void INTERNAL_onTouchEvent(
int fingerId,
TouchLocationState state,
float x,
float y,
float dx,
float dy
)
{
// Calculate the scaled touch position
Vector2 touchPos = new Vector2(
(float) Math.Round(x * DisplayWidth),
(float) Math.Round(y * DisplayHeight)
);
// Notify the Gesture Detector about the event
switch (state)
{
case TouchLocationState.Pressed:
GestureDetector.OnPressed(fingerId, touchPos);
break;
case TouchLocationState.Moved:
Vector2 delta = new Vector2(
(float) Math.Round(dx * DisplayWidth),
(float) Math.Round(dy * DisplayHeight)
);
GestureDetector.OnMoved(fingerId, touchPos, delta);
break;
case TouchLocationState.Released:
GestureDetector.OnReleased(fingerId, touchPos);
break;
}
}
internal static void SetFinger(int index, int fingerId, Vector2 fingerPos)
{
if (fingerId == NO_FINGER)
{
// Was there a finger here before and the user just released it?
if (prevTouches[index].State != TouchLocationState.Invalid
&& prevTouches[index].State != TouchLocationState.Released)
{
touches[index] = new TouchLocation(
prevTouches[index].Id,
TouchLocationState.Released,
prevTouches[index].Position,
prevTouches[index].State,
prevTouches[index].Position
);
}
else
{
/* Nothing interesting here at all.
* Insert invalid data so this element
* is not included in GetState().
*/
touches[index] = new TouchLocation(
NO_FINGER,
TouchLocationState.Invalid,
Vector2.Zero
);
}
return;
}
// Is this a newly pressed finger?
if (prevTouches[index].State == TouchLocationState.Invalid)
{
touches[index] = new TouchLocation(
fingerId,
TouchLocationState.Pressed,
fingerPos
);
}
else
{
// This finger was already down, so it's "moved"
touches[index] = new TouchLocation(
fingerId,
TouchLocationState.Moved,
fingerPos,
prevTouches[index].State,
prevTouches[index].Position
);
}
}
internal static void Update()
{
// Update Gesture Detector for time-sensitive gestures
GestureDetector.OnUpdate();
// Remember the last frame's touches
touches.CopyTo(prevTouches, 0);
// Get the latest finger data
FNAPlatform.UpdateTouchPanelState();
}
#endregion
}
}