137 lines
4.2 KiB
C#
137 lines
4.2 KiB
C#
#region License
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//
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// The Open Toolkit Library License
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//
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// Copyright (c) 2006 - 2009 the Open Toolkit library.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights to
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// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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// the Software, and to permit persons to whom the Software is furnished to do
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// so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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// OTHER DEALINGS IN THE SOFTWARE.
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//
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#endregion
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using System;
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using System.Collections.Generic;
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using System.Text;
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namespace OpenTK.Input
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{
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/// <summary>
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/// Encapsulates the state of a mouse device.
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/// </summary>
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public struct MouseState : IEquatable<MouseState>
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{
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#region Fields
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// Allocate enough ints to store all mouse buttons
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const int NumInts = ((int)MouseButton.LastButton + 31) / 32;
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// The following line triggers bogus CS0214 in gmcs 2.0.1, sigh...
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unsafe fixed int Buttons[NumInts];
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#endregion
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#region Public Members
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/// <summary>
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/// Gets a <see cref="System.Boolean"/> indicating whether this button is down.
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/// </summary>
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/// <param name="button">The <see cref="OpenTK.Input.MouseButton"/> to check.</param>
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public bool IsKeyDown(MouseButton button)
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{
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return ReadBit((int)button);
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}
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/// <summary>
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/// Gets a <see cref="System.Boolean"/> indicating whether this button is up.
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/// </summary>
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/// <param name="button">The <see cref="OpenTK.Input.MouseButton"/> to check.</param>
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public bool IsKeyUp(MouseButton button)
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{
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return !ReadBit((int)button);
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}
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#endregion
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#region Internal Members
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internal bool ReadBit(int offset)
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{
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int int_offset = offset / 32;
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int bit_offset = offset % 32;
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unsafe
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{
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fixed (int* b = Buttons)
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{
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return (*(b + int_offset) & (1 << bit_offset)) != 0u;
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}
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}
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}
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internal void EnableBit(int offset)
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{
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int int_offset = offset / 32;
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int bit_offset = offset % 32;
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unsafe
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{
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fixed (int* b = Buttons)
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{
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*(b + int_offset) |= 1 << bit_offset;
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}
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}
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}
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internal void DisableBit(int offset)
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{
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int int_offset = offset / 32;
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int bit_offset = offset % 32;
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unsafe
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{
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fixed (int* b = Buttons)
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{
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*(b + int_offset) &= ~(1 << bit_offset);
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}
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}
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}
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#endregion
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#region IEquatable<MouseState> Members
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/// <summary>
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/// Compares two MouseState instances.
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/// </summary>
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/// <param name="other">The instance to compare two.</param>
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/// <returns>True, if both instances are equal; false otherwise.</returns>
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public bool Equals(MouseState other)
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{
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bool equal = true;
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unsafe
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{
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fixed (int* b1 = Buttons)
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fixed (int* b2 = other.Buttons)
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{
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for (int i = 0; equal && i < NumInts; i++)
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equal &= *(b1 + i) == *(b2 + i);
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}
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}
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return equal;
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}
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#endregion
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}
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}
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