void UpdateKeyboard()
{
for (int i = 0; i < 256; i++)
{
VirtualKeys key = (VirtualKeys)i;
bool pressed = (Functions.GetAsyncKeyState(key) >> 8) != 0;
if (KeyMap.ContainsKey(key))
{
keyboard[KeyMap[key]] = pressed;
}
}
}
IntPtr WindowProcedure(IntPtr handle, WindowMessage message, IntPtr wParam, IntPtr lParam)
{
switch (message)
{
#region Size / Move / Style events
case WindowMessage.ACTIVATE:
// See http://msdn.microsoft.com/en-us/library/ms646274(VS.85).aspx (WM_ACTIVATE notification):
// wParam: The low-order word specifies whether the window is being activated or deactivated.
bool new_focused_state = Focused;
if (IntPtr.Size == 4)
{
focused = (wParam.ToInt32() & 0xFFFF) != 0;
}
else
{
focused = (wParam.ToInt64() & 0xFFFF) != 0;
}
if (new_focused_state != Focused)
{
FocusedChanged(this, EventArgs.Empty);
}
break;
case WindowMessage.ENTERMENULOOP:
case WindowMessage.ENTERSIZEMOVE:
// Entering the modal size/move loop: we don't want rendering to
// stop during this time, so we register a timer callback to continue
// processing from time to time.
StartTimer(handle);
break;
case WindowMessage.EXITMENULOOP:
case WindowMessage.EXITSIZEMOVE:
// ExitingmModal size/move loop: the timer callback is no longer
// necessary.
StopTimer(handle);
break;
case WindowMessage.ERASEBKGND:
return(new IntPtr(1));
case WindowMessage.WINDOWPOSCHANGED:
unsafe
{
WindowPosition *pos = (WindowPosition *)lParam;
if (window != null && pos->hwnd == window.Handle)
{
Point new_location = new Point(pos->x, pos->y);
if (Location != new_location)
{
bounds.Location = new_location;
Move(this, EventArgs.Empty);
}
Size new_size = new Size(pos->cx, pos->cy);
if (Size != new_size)
{
bounds.Width = pos->cx;
bounds.Height = pos->cy;
Win32Rectangle rect;
Functions.GetClientRect(handle, out rect);
client_rectangle = rect.ToRectangle();
Functions.SetWindowPos(child_window.Handle, IntPtr.Zero, 0, 0, ClientRectangle.Width, ClientRectangle.Height,
SetWindowPosFlags.NOZORDER | SetWindowPosFlags.NOOWNERZORDER |
SetWindowPosFlags.NOACTIVATE | SetWindowPosFlags.NOSENDCHANGING);
if (suppress_resize <= 0)
{
Resize(this, EventArgs.Empty);
}
}
// Ensure cursor remains grabbed
if (!CursorVisible)
{
GrabCursor();
}
}
}
break;
case WindowMessage.STYLECHANGED:
unsafe
{
if (wParam.ToInt64() == (long)GWL.STYLE)
{
WindowStyle style = ((StyleStruct *)lParam)->New;
if ((style & WindowStyle.Popup) != 0)
{
windowBorder = WindowBorder.Hidden;
}
else if ((style & WindowStyle.ThickFrame) != 0)
{
windowBorder = WindowBorder.Resizable;
}
else if ((style & ~(WindowStyle.ThickFrame | WindowStyle.MaximizeBox)) != 0)
{
windowBorder = WindowBorder.Fixed;
}
}
}
// Ensure cursor remains grabbed
if (!CursorVisible)
{
GrabCursor();
}
break;
case WindowMessage.SIZE:
SizeMessage state = (SizeMessage)wParam.ToInt64();
WindowState new_state = windowState;
switch (state)
{
case SizeMessage.RESTORED: new_state = borderless_maximized_window_state ?
WindowState.Maximized : WindowState.Normal; break;
case SizeMessage.MINIMIZED: new_state = WindowState.Minimized; break;
case SizeMessage.MAXIMIZED: new_state = WindowBorder == WindowBorder.Hidden ?
WindowState.Fullscreen : WindowState.Maximized;
break;
}
if (new_state != windowState)
{
windowState = new_state;
WindowStateChanged(this, EventArgs.Empty);
}
// Ensure cursor remains grabbed
if (!CursorVisible)
{
GrabCursor();
}
break;
#endregion
#region Input events
case WindowMessage.CHAR:
if (IntPtr.Size == 4)
{
key_press.KeyChar = (char)wParam.ToInt32();
}
else
{
key_press.KeyChar = (char)wParam.ToInt64();
}
KeyPress(this, key_press);
break;
case WindowMessage.MOUSEMOVE:
Point point = new Point(
(short)((uint)lParam.ToInt32() & 0x0000FFFF),
(short)(((uint)lParam.ToInt32() & 0xFFFF0000) >> 16));
mouse.Position = point;
if (mouse_outside_window)
{
// Once we receive a mouse move event, it means that the mouse has
// re-entered the window.
mouse_outside_window = false;
EnableMouseTracking();
MouseEnter(this, EventArgs.Empty);
}
break;
case WindowMessage.MOUSELEAVE:
mouse_outside_window = true;
// Mouse tracking is disabled automatically by the OS
MouseLeave(this, EventArgs.Empty);
break;
case WindowMessage.MOUSEWHEEL:
// This is due to inconsistent behavior of the WParam value on 64bit arch, whese
// wparam = 0xffffffffff880000 or wparam = 0x00000000ff100000
mouse.WheelPrecise += ((long)wParam << 32 >> 48) / 120.0f;
break;
case WindowMessage.LBUTTONDOWN:
Functions.SetCapture(window.Handle);
mouse[MouseButton.Left] = true;
break;
case WindowMessage.MBUTTONDOWN:
Functions.SetCapture(window.Handle);
mouse[MouseButton.Middle] = true;
break;
case WindowMessage.RBUTTONDOWN:
Functions.SetCapture(window.Handle);
mouse[MouseButton.Right] = true;
break;
case WindowMessage.XBUTTONDOWN:
Functions.SetCapture(window.Handle);
mouse[((wParam.ToInt32() & 0xFFFF0000) >> 16) !=
(int)MouseKeys.XButton1 ? MouseButton.Button1 : MouseButton.Button2] = true;
break;
case WindowMessage.LBUTTONUP:
Functions.ReleaseCapture();
mouse[MouseButton.Left] = false;
break;
case WindowMessage.MBUTTONUP:
Functions.ReleaseCapture();
mouse[MouseButton.Middle] = false;
break;
case WindowMessage.RBUTTONUP:
Functions.ReleaseCapture();
mouse[MouseButton.Right] = false;
break;
case WindowMessage.XBUTTONUP:
Functions.ReleaseCapture();
mouse[GET_XBUTTON_WPARAM(wParam.ToInt32())] = false;
break;
// Keyboard events:
case WindowMessage.KEYDOWN:
case WindowMessage.KEYUP:
case WindowMessage.SYSKEYDOWN:
case WindowMessage.SYSKEYUP:
bool pressed =
message == WindowMessage.KEYDOWN ||
message == WindowMessage.SYSKEYDOWN;
// 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 = (lParam.ToInt64() & ExtendedBit) != 0;
uint scancode = (uint)((lParam.ToInt64() >> 16) & 0xFF);
Key key = Key.Unknown;
switch ((VirtualKeys)wParam)
{
case VirtualKeys.SHIFT:
// 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 reliable 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.
// Note: we release both keys when either shift is released.
// Otherwise, the state of one key might be stuck to pressed.
if (ShiftRightScanCode != 0 && pressed)
{
if (scancode == ShiftRightScanCode)
{
key = Input.Key.ShiftRight;
}
else
{
key = Input.Key.ShiftLeft;
}
}
else
{
// Windows 9x and NT4.0 or key release event.
keyboard.SetKey(Input.Key.ShiftLeft, ShiftLeftScanCode, pressed);
keyboard.SetKey(Input.Key.ShiftRight, ShiftRightScanCode, pressed);
}
break;
case VirtualKeys.CONTROL:
if (extended)
{
key = Input.Key.ControlRight;
}
else
{
key = Input.Key.ControlLeft;
}
break;
case VirtualKeys.MENU:
if (extended)
{
key = Input.Key.AltRight;
}
else
{
key = Input.Key.AltLeft;
}
break;
case VirtualKeys.RETURN:
if (extended)
{
key = Key.KeypadEnter;
}
else
{
key = Key.Enter;
}
break;
default:
if (!KeyMap.ContainsKey((VirtualKeys)wParam))
{
Debug.Print("Virtual key {0} ({1}) not mapped.", (VirtualKeys)wParam, (long)lParam);
}
else
{
key = KeyMap[(VirtualKeys)wParam];
}
break;
}
keyboard.SetKey(key, scancode, pressed);
return(IntPtr.Zero);
case WindowMessage.SYSCHAR:
return(IntPtr.Zero);
case WindowMessage.KILLFOCUS:
keyboard.ClearKeys();
break;
#endregion
#region Creation / Destruction events
case WindowMessage.CREATE:
CreateStruct cs = (CreateStruct)Marshal.PtrToStructure(lParam, typeof(CreateStruct));
if (cs.hwndParent == IntPtr.Zero)
{
bounds.X = cs.x;
bounds.Y = cs.y;
bounds.Width = cs.cx;
bounds.Height = cs.cy;
Win32Rectangle rect;
Functions.GetClientRect(handle, out rect);
client_rectangle = rect.ToRectangle();
invisible_since_creation = true;
}
break;
case WindowMessage.CLOSE:
System.ComponentModel.CancelEventArgs e = new System.ComponentModel.CancelEventArgs();
Closing(this, e);
if (!e.Cancel)
{
DestroyWindow();
break;
}
return(IntPtr.Zero);
case WindowMessage.DESTROY:
exists = false;
Functions.UnregisterClass(ClassName, Instance);
window.Dispose();
child_window.Dispose();
Closed(this, EventArgs.Empty);
break;
#endregion
}
return(Functions.DefWindowProc(handle, message, wParam, lParam));
}
public bool ProcessKeyboardEvent(RawInput rin)
{
bool processed = false;
bool pressed =
rin.Data.Keyboard.Message == (int)WindowMessage.KEYDOWN ||
rin.Data.Keyboard.Message == (int)WindowMessage.SYSKEYDOWN;
ContextHandle handle = new ContextHandle(rin.Header.Device);
KeyboardState keyboard;
if (!rawids.ContainsKey(handle))
{
RefreshDevices();
}
if (keyboards.Count == 0)
{
return(false);
}
// Note:For some reason, my Microsoft Digital 3000 keyboard reports 0
// as rin.Header.Device for the "zoom-in/zoom-out" buttons.
// That's problematic, because no device has a "0" id.
// As a workaround, we'll add those buttons to the first device (if any).
int keyboard_handle = rawids.ContainsKey(handle) ? rawids[handle] : 0;
keyboard = keyboards[keyboard_handle];
// Generic control, shift, alt keys may be sent instead of left/right.
// It seems you have to explicitly register left/right events.
switch (rin.Data.Keyboard.VKey)
{
case VirtualKeys.SHIFT:
keyboard[Input.Key.ShiftLeft] = keyboard[Input.Key.ShiftRight] = pressed;
processed = true;
break;
case VirtualKeys.CONTROL:
keyboard[Input.Key.ControlLeft] = keyboard[Input.Key.ControlRight] = pressed;
processed = true;
break;
case VirtualKeys.MENU:
keyboard[Input.Key.AltLeft] = keyboard[Input.Key.AltRight] = pressed;
processed = true;
break;
default:
if (!KeyMap.ContainsKey(rin.Data.Keyboard.VKey))
{
Debug.Print("Virtual key {0} ({1}) not mapped.",
rin.Data.Keyboard.VKey, (int)rin.Data.Keyboard.VKey);
}
else
{
keyboard[KeyMap[rin.Data.Keyboard.VKey]] = pressed;
processed = true;
}
break;
}
lock (UpdateLock)
{
keyboards[keyboard_handle] = keyboard;
return(processed);
}
}
