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Can now distinguish between left and right control, shift, alt and enter keys.

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This commit is contained in:
the_fiddler 2008-03-10 08:50:19 +00:00
parent b04606640f
commit 8386c20b6a
3 changed files with 87 additions and 26 deletions
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39
Source/OpenTK/Platform/Windows/API.cs
View file

@ -521,7 +521,7 @@ namespace OpenTK.Platform.Windows
#endregion
#region GetASsyncKeyState
#region GetAsyncKeyState
[System.Security.SuppressUnmanagedCodeSecurity]
[DllImport("user32.dll", SetLastError = true)]
@ -529,6 +529,26 @@ namespace OpenTK.Platform.Windows
#endregion
#region GetKeyState
[System.Security.SuppressUnmanagedCodeSecurity]
[DllImport("user32.dll", SetLastError = true)]
internal static extern SHORT GetKeyState(VirtualKeys vKey);
#endregion
#region MapVirtualKey
[System.Security.SuppressUnmanagedCodeSecurity]
[DllImport("user32.dll", SetLastError = true)]
internal static extern UINT MapVirtualKey(UINT uCode, MapVirtualKeyType uMapType);
[System.Security.SuppressUnmanagedCodeSecurity]
[DllImport("user32.dll", SetLastError = true)]
internal static extern UINT MapVirtualKey(VirtualKeys vkey, MapVirtualKeyType uMapType);
#endregion
#region ShowWindow
/// <summary>
@ -3506,6 +3526,23 @@ namespace OpenTK.Platform.Windows
#endregion
#region MapVirtualKeyType
internal enum MapVirtualKeyType
{
/// <summary>uCode is a virtual-key code and is translated into a scan code. If it is a virtual-key code that does not distinguish between left- and right-hand keys, the left-hand scan code is returned. If there is no translation, the function returns 0.</summary>
VirtualKeyToScanCode = 0,
/// <summary>uCode is a scan code and is translated into a virtual-key code that does not distinguish between left- and right-hand keys. If there is no translation, the function returns 0.</summary>
ScanCodeToVirtualKey = 1,
/// <summary>uCode is a virtual-key code and is translated into an unshifted character value in the low-order word of the return value. Dead keys (diacritics) are indicated by setting the top bit of the return value. If there is no translation, the function returns 0.</summary>
VirtualKeyToCharacter = 2,
/// <summary>Windows NT/2000/XP: uCode is a scan code and is translated into a virtual-key code that distinguishes between left- and right-hand keys. If there is no translation, the function returns 0.</summary>
ScanCodeToVirtualKeyExtended = 3,
VirtualKeyToScanCodeExtended = 4,
}
#endregion
#endregion
#region --- Callbacks ---

72
Source/OpenTK/Platform/Windows/WMInput.cs
View file

@ -25,6 +25,10 @@ namespace OpenTK.Platform.Windows
IList<KeyboardDevice> keyboards = new List<KeyboardDevice>(1);
IList<MouseDevice> mice = new List<MouseDevice>(1);
internal static readonly WinKeyMap KeyMap = new WinKeyMap();
// Used to distinguish left and right control, alt and enter keys.
const int ExtendedBit = 1 << 24;
// Used to distinguish left and right shift keys.
static readonly uint ShiftRightScanCode = Functions.MapVirtualKey(VirtualKeys.RSHIFT, 0);
#region --- Constructor ---
@ -110,42 +114,58 @@ namespace OpenTK.Platform.Windows
case WindowMessage.SYSKEYUP:
bool pressed = (WindowMessage)msg.Msg == WindowMessage.KEYDOWN ||
(WindowMessage)msg.Msg == WindowMessage.SYSKEYDOWN;
//bool left = (((int)msg.LParam) & 0x100000) == 0; // valid for Shift, Control and Menu presses.
// Shift/Control/Alt behave strangely when e.g. ShiftRight is held down and ShiftLeft is pressed
// and released. It looks like neither key is released in this case, or that the wrong key is
// released in the case of Control and Alt.
// To combat this, we are going to release both keys when either is released. Hacky, but should work.
// Win95 does not distinguish left/right key constants (GetAsyncKeyState returns 0).
// In this case, both keys will be reported as pressed.
bool extended = (((int)msg.LParam) & ExtendedBit) != 0;
switch ((VirtualKeys)msg.WParam)
{
case VirtualKeys.SHIFT:
// Win95 does not distinguish left/right constants (GetAsyncKeyState returns 0).
// In this case, report both keys as down.
bool left = Functions.GetAsyncKeyState(VirtualKeys.LSHIFT) != 0;
bool right = Functions.GetAsyncKeyState(VirtualKeys.RSHIFT) != 0;
if (left)
// The behavior of this key is very strange. Unlike Control and Alt, there is no extended bit
// to distinguish between left and right keys. Moreover, pressing both keys and releasing one
// may result in both keys being held down (but not always).
// The only reliably way to solve this was reported by BlueMonkMN at the forums: we should
// check the scancodes. It looks like GLFW does the same thing, so it should be reliable.
// TODO: Not 100% reliable, when both keys are pressed at once.
if (ShiftRightScanCode != 0)
{
if ((((int)msg.LParam >> 16) & 0xFF) == ShiftRightScanCode)
keyboard[Input.Key.ShiftRight] = pressed;
else
keyboard[Input.Key.ShiftLeft] = pressed;
}
else
{
// Should only fall here on Windows 9x and NT4.0-
keyboard[Input.Key.ShiftLeft] = pressed;
if (right)
keyboard[Input.Key.ShiftRight] = pressed;
if (!left && !right)
keyboard[Input.Key.ShiftLeft] = keyboard[Input.Key.ShiftRight] = pressed;
}
return;
case VirtualKeys.CONTROL:
left = Functions.GetAsyncKeyState(VirtualKeys.LCONTROL) != 0;
right = Functions.GetAsyncKeyState(VirtualKeys.RCONTROL) != 0;
if (left)
keyboard[Input.Key.ControlLeft] = pressed;
if (right)
if (extended)
keyboard[Input.Key.ControlRight] = pressed;
if (!left && !right)
keyboard[Input.Key.ControlLeft] = keyboard[Input.Key.ControlRight] = pressed;
else
keyboard[Input.Key.ControlLeft] = pressed;
return;
case VirtualKeys.MENU:
left = Functions.GetAsyncKeyState(VirtualKeys.LMENU) != 0;
right = Functions.GetAsyncKeyState(VirtualKeys.RMENU) != 0;
if (left)
keyboard[Input.Key.AltLeft] = pressed;
if (right)
if (extended)
keyboard[Input.Key.AltRight] = pressed;
if (!left && !right)
keyboard[Input.Key.AltLeft] = keyboard[Input.Key.AltRight] = pressed;
else
keyboard[Input.Key.AltLeft] = pressed;
return;
case VirtualKeys.RETURN:
if (extended)
keyboard[Key.KeypadEnter] = pressed;
else
keyboard[Key.Enter] = pressed;
return;
default:
@ -162,6 +182,10 @@ namespace OpenTK.Platform.Windows
}
break;
case WindowMessage.KILLFOCUS:
keyboard.ClearKeys();
break;
case WindowMessage.DESTROY:
Debug.Print("Input window detached from parent {0}.", Handle);
ReleaseHandle();

2
Source/OpenTK/Platform/Windows/WinGLContext.cs
View file

@ -392,7 +392,7 @@ namespace OpenTK.Platform.Windows
if (!Wgl.Imports.DeleteContext(renderContext))
{
//throw new ApplicationException("Could not destroy the OpenGL render context. Error: " + Marshal.GetLastWin32Error());
//Debug.Print("Could not destroy the OpenGL render context. Error: {0}", Marshal.GetLastWin32Error());
Debug.Print("Could not destroy the OpenGL render context. Error: {0}", Marshal.GetLastWin32Error());
}
renderContext = null;
}