298 lines
10 KiB
C#
298 lines
10 KiB
C#
#region --- License ---
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/* Copyright (c) 2007 Stefanos Apostolopoulos
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* See license.txt for license information
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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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using System.Windows.Forms;
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using OpenTK.Input;
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using System.Diagnostics;
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namespace OpenTK.Platform.Windows
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{
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// Input driver for legacy (pre XP) Windows platforms.
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sealed class WMInput : NativeWindow, IInputDriver
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{
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#region --- Fields ---
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WinMMJoystick joystick_driver = new WinMMJoystick();
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// Driver supports only one keyboard and mouse;
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KeyboardDevice keyboard = new KeyboardDevice();
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MouseDevice mouse = new MouseDevice();
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IList<KeyboardDevice> keyboards = new List<KeyboardDevice>(1);
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IList<MouseDevice> mice = new List<MouseDevice>(1);
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internal static readonly WinKeyMap KeyMap = new WinKeyMap();
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// Used to distinguish left and right control, alt and enter keys.
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const long ExtendedBit = 1 << 24;
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// Used to distinguish left and right shift keys.
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static readonly uint ShiftRightScanCode = Functions.MapVirtualKey(VirtualKeys.RSHIFT, 0);
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#endregion
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#region --- Constructor ---
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public WMInput(WinWindowInfo parent)
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{
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Debug.WriteLine("Initalizing WMInput driver.");
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Debug.Indent();
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AssignHandle(parent.WindowHandle);
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Debug.Print("Input window attached to parent {0}", parent);
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Debug.Unindent();
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keyboard.Description = "Standard Windows keyboard";
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keyboard.NumberOfFunctionKeys = 12;
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keyboard.NumberOfKeys = 101;
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keyboard.NumberOfLeds = 3;
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mouse.Description = "Standard Windows mouse";
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mouse.NumberOfButtons = 3;
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mouse.NumberOfWheels = 1;
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keyboards.Add(keyboard);
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mice.Add(mouse);
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}
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#endregion
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#region protected override void WndProc(ref Message msg)
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bool mouse_about_to_enter = false;
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protected override void WndProc(ref Message msg)
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{
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UIntPtr lparam, wparam;
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unsafe
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{
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lparam = (UIntPtr)(void*)msg.LParam;
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wparam = (UIntPtr)(void*)msg.WParam;
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}
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switch ((WindowMessage)msg.Msg)
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{
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// Mouse events:
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case WindowMessage.NCMOUSEMOVE:
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mouse_about_to_enter = true; // Used to simulate a mouse enter event.
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break;
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case WindowMessage.MOUSEMOVE:
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mouse.Position = new System.Drawing.Point(
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(int)(lparam.ToUInt32() & 0x0000FFFF),
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(int)(lparam.ToUInt32() & 0xFFFF0000) >> 16);
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if (mouse_about_to_enter)
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{
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Cursor.Current = Cursors.Default;
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mouse_about_to_enter = false;
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}
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return;
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case WindowMessage.MOUSEWHEEL:
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// This is due to inconsistent behavior of the WParam value on 64bit arch, whese
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// wparam = 0xffffffffff880000 or wparam = 0x00000000ff100000
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mouse.Wheel += (int)((long)msg.WParam << 32 >> 48) / 120;
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return;
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case WindowMessage.LBUTTONDOWN:
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mouse[MouseButton.Left] = true;
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return;
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case WindowMessage.MBUTTONDOWN:
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mouse[MouseButton.Middle] = true;
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return;
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case WindowMessage.RBUTTONDOWN:
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mouse[MouseButton.Right] = true;
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return;
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case WindowMessage.XBUTTONDOWN:
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mouse[((wparam.ToUInt32() & 0xFFFF0000) >> 16) != (int)MouseKeys.XButton1 ? MouseButton.Button1 : MouseButton.Button2] = true;
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return;
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case WindowMessage.LBUTTONUP:
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mouse[MouseButton.Left] = false;
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return;
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case WindowMessage.MBUTTONUP:
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mouse[MouseButton.Middle] = false;
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return;
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case WindowMessage.RBUTTONUP:
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mouse[MouseButton.Right] = false;
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return;
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case WindowMessage.XBUTTONUP:
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// TODO: Is this correct?
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mouse[((wparam.ToUInt32() & 0xFFFF0000) >> 16) != (int)MouseKeys.XButton1 ? MouseButton.Button1 : MouseButton.Button2] = false;
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return;
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// Keyboard events:
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case WindowMessage.KEYDOWN:
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case WindowMessage.KEYUP:
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case WindowMessage.SYSKEYDOWN:
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case WindowMessage.SYSKEYUP:
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bool pressed = (WindowMessage)msg.Msg == WindowMessage.KEYDOWN ||
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(WindowMessage)msg.Msg == WindowMessage.SYSKEYDOWN;
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// Shift/Control/Alt behave strangely when e.g. ShiftRight is held down and ShiftLeft is pressed
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// and released. It looks like neither key is released in this case, or that the wrong key is
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// released in the case of Control and Alt.
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// To combat this, we are going to release both keys when either is released. Hacky, but should work.
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// Win95 does not distinguish left/right key constants (GetAsyncKeyState returns 0).
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// In this case, both keys will be reported as pressed.
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bool extended = (msg.LParam.ToInt64() & ExtendedBit) != 0;
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switch ((VirtualKeys)wparam)
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{
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case VirtualKeys.SHIFT:
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// The behavior of this key is very strange. Unlike Control and Alt, there is no extended bit
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// to distinguish between left and right keys. Moreover, pressing both keys and releasing one
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// may result in both keys being held down (but not always).
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// The only reliably way to solve this was reported by BlueMonkMN at the forums: we should
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// check the scancodes. It looks like GLFW does the same thing, so it should be reliable.
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// TODO: Not 100% reliable, when both keys are pressed at once.
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if (ShiftRightScanCode != 0)
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{
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unchecked
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{
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if (((lparam.ToUInt32() >> 16) & 0xFF) == ShiftRightScanCode)
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keyboard[Input.Key.ShiftRight] = pressed;
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else
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keyboard[Input.Key.ShiftLeft] = pressed;
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}
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}
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else
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{
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// Should only fall here on Windows 9x and NT4.0-
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keyboard[Input.Key.ShiftLeft] = pressed;
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}
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return;
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case VirtualKeys.CONTROL:
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if (extended)
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keyboard[Input.Key.ControlRight] = pressed;
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else
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keyboard[Input.Key.ControlLeft] = pressed;
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return;
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case VirtualKeys.MENU:
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if (extended)
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keyboard[Input.Key.AltRight] = pressed;
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else
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keyboard[Input.Key.AltLeft] = pressed;
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return;
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case VirtualKeys.RETURN:
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if (extended)
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keyboard[Key.KeypadEnter] = pressed;
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else
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keyboard[Key.Enter] = pressed;
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return;
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default:
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if (!WMInput.KeyMap.ContainsKey((VirtualKeys)msg.WParam))
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{
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Debug.Print("Virtual key {0} ({1}) not mapped.", (VirtualKeys)msg.WParam, (int)msg.WParam);
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break;
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}
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else
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{
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keyboard[WMInput.KeyMap[(VirtualKeys)msg.WParam]] = pressed;
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return;
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}
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}
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break;
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case WindowMessage.KILLFOCUS:
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keyboard.ClearKeys();
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break;
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case WindowMessage.DESTROY:
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Debug.Print("Input window detached from parent {0}.", Handle);
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ReleaseHandle();
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break;
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case WindowMessage.QUIT:
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Debug.WriteLine("Input window quit.");
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this.Dispose();
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break;
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}
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base.WndProc(ref msg);
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}
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#endregion
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#region --- IInputDriver Members ---
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#region IInputDriver Members
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public void Poll()
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{
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joystick_driver.Poll();
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}
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#endregion
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#region IKeyboardDriver Members
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public IList<KeyboardDevice> Keyboard
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{
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get { return keyboards; }
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}
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#endregion
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#region IMouseDriver Members
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public IList<MouseDevice> Mouse
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{
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get { return mice; }
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}
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#endregion
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#region IJoystickDriver Members
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public IList<JoystickDevice> Joysticks
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{
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get { return joystick_driver.Joysticks; }
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}
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#endregion
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#endregion
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#region --- IDisposable Members ---
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private bool disposed;
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public void Dispose()
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{
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Dispose(true);
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GC.SuppressFinalize(this);
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}
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private void Dispose(bool manual)
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{
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if (!disposed)
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{
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if (manual)
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this.ReleaseHandle();
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disposed = true;
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}
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}
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~WMInput()
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{
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Dispose(false);
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}
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#endregion
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}
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}
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