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* Input/MouseState.cs: Implemented MouseState structure.

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This commit is contained in:
the_fiddler 2010-10-20 15:14:38 +00:00
parent ca30b85bad
commit 362a853664
1 changed files with 81 additions and 5 deletions
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86
Source/OpenTK/Input/MouseState.cs
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@ -36,10 +36,76 @@ namespace OpenTK.Input
/// </summary>
public struct MouseState : IEquatable<MouseState>
{
#region Constructors
#region Fields
internal MouseState(MouseButton[] buttons)
// Allocate enough ints to store all mouse buttons
const int NumInts = ((int)MouseButton.LastButton + 31) / 32;
// The following line triggers bogus CS0214 in gmcs 2.0.1, sigh...
unsafe fixed int Buttons[NumInts];
#endregion
#region Public Members
/// <summary>
/// Gets a <see cref="System.Boolean"/> indicating whether this button is down.
/// </summary>
/// <param name="button">The <see cref="OpenTK.Input.MouseButton"/> to check.</param>
public bool IsKeyDown(MouseButton button)
{
return ReadBit((int)button);
}
/// <summary>
/// Gets a <see cref="System.Boolean"/> indicating whether this button is up.
/// </summary>
/// <param name="button">The <see cref="OpenTK.Input.MouseButton"/> to check.</param>
public bool IsKeyUp(MouseButton button)
{
return !ReadBit((int)button);
}
#endregion
#region Internal Members
internal bool ReadBit(int offset)
{
int int_offset = offset / 32;
int bit_offset = offset % 32;
unsafe
{
fixed (int* b = Buttons)
{
return (*(b + int_offset) & (1 << bit_offset)) != 0u;
}
}
}
internal void EnableBit(int offset)
{
int int_offset = offset / 32;
int bit_offset = offset % 32;
unsafe
{
fixed (int* b = Buttons)
{
*(b + int_offset) |= 1 << bit_offset;
}
}
}
internal void DisableBit(int offset)
{
int int_offset = offset / 32;
int bit_offset = offset % 32;
unsafe
{
fixed (int* b = Buttons)
{
*(b + int_offset) &= ~(1 << bit_offset);
}
}
}
#endregion
@ -47,13 +113,23 @@ namespace OpenTK.Input
#region IEquatable<MouseState> Members
/// <summary>
/// Compares two MouseState instances for equality.
/// Compares two MouseState instances.
/// </summary>
/// <param name="other">The instance to compare to.</param>
/// <param name="other">The instance to compare two.</param>
/// <returns>True, if both instances are equal; false otherwise.</returns>
public bool Equals(MouseState other)
{
throw new NotImplementedException();
bool equal = true;
unsafe
{
fixed (int* b1 = Buttons)
fixed (int* b2 = other.Buttons)
{
for (int i = 0; equal && i < NumInts; i++)
equal &= *(b1 + i) == *(b2 + i);
}
}
return equal;
}
#endregion