/// <summary>
/// Overridden window message callback used to capture input for the window
/// </summary>
/// <param name="message">Window message sent to the window</param>
protected override void WndProc(ref Message message)
{
base.WndProc(ref message);
// Process the message differently based on its message id
switch (message.Msg)
{
// Window is being asked which types of input it can process
case (int)UnsafeNativeMethods.WindowMessages.WM_GETDLGCODE: {
int returnCode = message.Result.ToInt32();
returnCode |= DlgCodeFlags;
message.Result = new IntPtr(returnCode);
break;
}
#if USE_WM_INPUT
// Raw input data is being sent to the window
case (int)UnsafeNativeMethods.WindowMessages.WM_INPUT: {
processWmInput(ref message);
break;
}
#endif
// Key on the keyboard was pressed / released
case (int)UnsafeNativeMethods.WindowMessages.WM_KEYDOWN: {
int virtualKeyCode = message.WParam.ToInt32();
// bool repetition = (message.LParam.ToInt32() & WM_KEYDOWN_WASDOWN) != 0;
OnKeyPressed((Keys)virtualKeyCode);
break;
}
case (int)UnsafeNativeMethods.WindowMessages.WM_KEYUP: {
int virtualKeyCode = message.WParam.ToInt32();
OnKeyReleased((Keys)virtualKeyCode);
break;
}
// Character has been entered on the keyboard
case (int)UnsafeNativeMethods.WindowMessages.WM_CHAR: {
char character = (char)message.WParam.ToInt32();
OnCharacterEntered(character);
break;
}
// Mouse has been moved
case (int)UnsafeNativeMethods.WindowMessages.WM_MOUSEMOVE: {
if (!this.trackingMouse)
{
int result = UnsafeNativeMethods.TrackMouseEvent(ref this.mouseEventTrackData);
Debug.Assert(
result != 0,
"Could not set up registration for mouse events",
"The TrackMouseEvent() function failed, which means the game will not " +
"detect when the mouse leaves the game window. This might result in " +
"the assumed mouse position remaining somewhere near the window border " +
"even though the mouse has been moved away from the game window."
);
this.trackingMouse = (result != 0);
}
short x = (short)(message.LParam.ToInt32() & 0xFFFF);
short y = (short)(message.LParam.ToInt32() >> 16);
OnMouseMoved((float)x, (float)y);
break;
}
// Left mouse button pressed / released
case (int)UnsafeNativeMethods.WindowMessages.WM_LBUTTONDOWN:
case (int)UnsafeNativeMethods.WindowMessages.WM_LBUTTONDBLCLK: {
OnMouseButtonPressed(MouseButtons.Left);
break;
}
case (int)UnsafeNativeMethods.WindowMessages.WM_LBUTTONUP: {
OnMouseButtonReleased(MouseButtons.Left);
break;
}
// Right mouse button pressed / released
case (int)UnsafeNativeMethods.WindowMessages.WM_RBUTTONDOWN:
case (int)UnsafeNativeMethods.WindowMessages.WM_RBUTTONDBLCLK: {
OnMouseButtonPressed(MouseButtons.Right);
break;
}
case (int)UnsafeNativeMethods.WindowMessages.WM_RBUTTONUP: {
OnMouseButtonReleased(MouseButtons.Right);
break;
}
// Middle mouse button pressed / released
case (int)UnsafeNativeMethods.WindowMessages.WM_MBUTTONDOWN:
case (int)UnsafeNativeMethods.WindowMessages.WM_MBUTTONDBLCLK: {
OnMouseButtonPressed(MouseButtons.Middle);
break;
}
case (int)UnsafeNativeMethods.WindowMessages.WM_MBUTTONUP: {
OnMouseButtonReleased(MouseButtons.Middle);
break;
}
// Extended mouse button pressed / released
case (int)UnsafeNativeMethods.WindowMessages.WM_XBUTTONDOWN:
case (int)UnsafeNativeMethods.WindowMessages.WM_XBUTTONDBLCLK: {
short button = (short)(message.WParam.ToInt32() >> 16);
if (button == 1)
{
OnMouseButtonPressed(MouseButtons.X1);
}
if (button == 2)
{
OnMouseButtonPressed(MouseButtons.X2);
}
break;
}
case (int)UnsafeNativeMethods.WindowMessages.WM_XBUTTONUP: {
short button = (short)(message.WParam.ToInt32() >> 16);
if (button == 1)
{
OnMouseButtonReleased(MouseButtons.X1);
}
if (button == 2)
{
OnMouseButtonReleased(MouseButtons.X2);
}
break;
}
// Mouse wheel rotated
case (int)UnsafeNativeMethods.WindowMessages.WM_MOUSEHWHEEL: {
short ticks = (short)(message.WParam.ToInt32() >> 16);
OnMouseWheelRotated((float)ticks / 120.0f);
break;
}
// Mouse has left the window's client area
case (int)UnsafeNativeMethods.WindowMessages.WM_MOUSELEAVE: {
OnMouseMoved(-1.0f, -1.0f);
this.trackingMouse = false;
break;
}
}
}
/// <summary>Filters out a message before it is dispatched</summary>
/// <param name="message">
/// Message that will be dispatched. You must not modify this message.
/// </param>
/// <returns>
/// True if the message has been processed by the filter and should not be
/// dispatched or false to continue processing of the message.
/// </returns>
bool IMessageFilter.PreFilterMessage(ref Message message)
{
// Process the message differently based on its message id
switch (message.Msg)
{
// Key on the keyboard was pressed / released
case (int)UnsafeNativeMethods.WindowMessages.WM_KEYDOWN: {
int virtualKeyCode = message.WParam.ToInt32();
// bool repetition = (message.LParam.ToInt32() & WM_KEYDOWN_WASDOWN) != 0;
OnKeyPressed((Keys)virtualKeyCode);
if (virtualKeyCode == 17)
{
ctrlKeyDown = true;
}
if (virtualKeyCode == 18)
{
altKeyDown = true;
}
UnsafeNativeMethods.TranslateMessage(ref message);
return(true); // consumed!
}
case (int)UnsafeNativeMethods.WindowMessages.WM_KEYUP: {
int virtualKeyCode = message.WParam.ToInt32();
OnKeyReleased((Keys)virtualKeyCode);
// Workaround for strange behavior of ctrl and alt key combinations
// Pressing & releasing both generates two keydowns but only one keyup.
if (virtualKeyCode == 17)
{
ctrlKeyDown = false;
if (altKeyDown)
{
OnKeyReleased((Keys)18);
altKeyDown = false;
}
}
else if (virtualKeyCode == 18)
{
altKeyDown = false;
if (ctrlKeyDown)
{
OnKeyReleased((Keys)17);
ctrlKeyDown = false;
}
}
return(true); // consumed!
}
// Character has been entered on the keyboard
case (int)UnsafeNativeMethods.WindowMessages.WM_CHAR: {
char character = (char)message.WParam.ToInt32();
OnCharacterEntered(character);
return(true); // consumed!
}
// Mouse has been moved
case (int)UnsafeNativeMethods.WindowMessages.WM_MOUSEMOVE: {
if (!this.trackingMouse)
{
int result = UnsafeNativeMethods.TrackMouseEvent(ref this.mouseEventTrackData);
Debug.Assert(
result != 0,
"Could not set up registration for mouse events",
"The TrackMouseEvent() function failed, which means the game will not " +
"detect when the mouse leaves the game window. This might result in " +
"the assumed mouse position remaining somewhere near the window border " +
"even though the mouse has been moved away from the game window."
);
this.trackingMouse = (result != 0);
}
short x = (short)(message.LParam.ToInt32() & 0xFFFF);
short y = (short)(message.LParam.ToInt32() >> 16);
OnMouseMoved((float)x, (float)y);
break;
}
// Left mouse button pressed / released
case (int)UnsafeNativeMethods.WindowMessages.WM_LBUTTONDOWN:
case (int)UnsafeNativeMethods.WindowMessages.WM_LBUTTONDBLCLK: {
OnMouseButtonPressed(MouseButtons.Left);
break;
}
case (int)UnsafeNativeMethods.WindowMessages.WM_LBUTTONUP: {
OnMouseButtonReleased(MouseButtons.Left);
break;
}
// Right mouse button pressed / released
case (int)UnsafeNativeMethods.WindowMessages.WM_RBUTTONDOWN:
case (int)UnsafeNativeMethods.WindowMessages.WM_RBUTTONDBLCLK: {
OnMouseButtonPressed(MouseButtons.Right);
break;
}
case (int)UnsafeNativeMethods.WindowMessages.WM_RBUTTONUP: {
OnMouseButtonReleased(MouseButtons.Right);
break;
}
// Middle mouse button pressed / released
case (int)UnsafeNativeMethods.WindowMessages.WM_MBUTTONDOWN:
case (int)UnsafeNativeMethods.WindowMessages.WM_MBUTTONDBLCLK: {
OnMouseButtonPressed(MouseButtons.Middle);
break;
}
case (int)UnsafeNativeMethods.WindowMessages.WM_MBUTTONUP: {
OnMouseButtonReleased(MouseButtons.Middle);
break;
}
// Extended mouse button pressed / released
case (int)UnsafeNativeMethods.WindowMessages.WM_XBUTTONDOWN:
case (int)UnsafeNativeMethods.WindowMessages.WM_XBUTTONDBLCLK: {
short button = (short)(message.WParam.ToInt32() >> 16);
if (button == 1)
{
OnMouseButtonPressed(MouseButtons.X1);
}
if (button == 2)
{
OnMouseButtonPressed(MouseButtons.X2);
}
break;
}
case (int)UnsafeNativeMethods.WindowMessages.WM_XBUTTONUP: {
short button = (short)(message.WParam.ToInt32() >> 16);
if (button == 1)
{
OnMouseButtonReleased(MouseButtons.X1);
}
if (button == 2)
{
OnMouseButtonReleased(MouseButtons.X2);
}
break;
}
// Mouse wheel rotated
case (int)UnsafeNativeMethods.WindowMessages.WM_MOUSEHWHEEL: {
short ticks = (short)(message.WParam.ToInt32() >> 16);
OnMouseWheelRotated((float)ticks / 120.0f);
break;
}
// Mouse has left the window's client area
case (int)UnsafeNativeMethods.WindowMessages.WM_MOUSELEAVE: {
OnMouseMoved(-1.0f, -1.0f);
this.trackingMouse = false;
break;
}
}
return(false);
}
/// <summary>Filters out a message before it is dispatched</summary>
/// <param name="message">
/// Message that will be dispatched. You must not modify this message.
/// </param>
/// <returns>
/// True if the message has been processed by the filter and should not be
/// dispatched or false to continue processing of the message.
/// </returns>
bool IMessageFilter.PreFilterMessage(ref Message message)
{
// Process the message differently based on its message id
switch (message.Msg)
{
case (int)UnsafeNativeMethods.WindowMessages.WM_SYSKEYDOWN: {
int virtualKeyCode = message.WParam.ToInt32();
// Don't handle these Alt+key presses because they'd block Windows' shortcuts
bool dontHandle =
(virtualKeyCode == (int)Keys.F4) ||
(virtualKeyCode == (int)Keys.Escape) ||
(virtualKeyCode == (int)Keys.Space);
if (dontHandle)
{
break;
}
goto case (int)UnsafeNativeMethods.WindowMessages.WM_KEYDOWN;
}
// Key on the keyboard was pressed
case (int)UnsafeNativeMethods.WindowMessages.WM_KEYDOWN: {
int virtualKeyCode = message.WParam.ToInt32();
switch (virtualKeyCode)
{
#if false // XNA doesn't want to distinguish Return and Enter
case 0x0D: { // VK_ENTER
bool extended = (message.LParam.ToInt32() & 0x01000000) != 0;
if (extended)
{
OnKeyPressed(Keys.Enter);
}
else
{
OnKeyPressed(Keys.??);
}
break;
}
#endif
case 0x10: { // VK_SHIFT
OnKeyPressed(
(Keys)UnsafeNativeMethods.MapVirtualKey(
(uint)(message.LParam.ToInt32() & 0x00FF0000) >> 16,
(uint)UnsafeNativeMethods.MapType.ScanCodeToVirtualKeyEx
)
);
break;
}
case 0x11: { // VK_CONTROL
bool extended = (message.LParam.ToInt32() & 0x01000000) != 0;
if (extended)
{
OnKeyPressed(Keys.RightControl);
}
else
{
OnKeyPressed(Keys.LeftControl);
}
break;
}
case 0x12: { // VK_MENU
bool extended = (message.LParam.ToInt32() & 0x01000000) != 0;
if (extended)
{
OnKeyPressed(Keys.RightAlt);
}
else
{
OnKeyPressed(Keys.LeftAlt);
}
break;
}
default: {
OnKeyPressed((Keys)virtualKeyCode);
break;
}
}
UnsafeNativeMethods.TranslateMessage(ref message);
return(true); // consumed!
}
// Key on the keyboard was released
case (int)UnsafeNativeMethods.WindowMessages.WM_SYSKEYUP:
case (int)UnsafeNativeMethods.WindowMessages.WM_KEYUP: {
int virtualKeyCode = message.WParam.ToInt32();
switch (virtualKeyCode)
{
#if false // We could, but XNA doesn't want to distinguish Return and Enter
case 0x0D: { // VK_ENTER
bool extended = (message.LParam.ToInt32() & 0x01000000) != 0;
if (extended)
{
OnKeyReleased(Keys.Enter);
}
else
{
OnKeyReleased(Keys.??);
}
break;
}
#endif
case 0x10: { // VK_SHIFT
OnKeyReleased(
(Keys)UnsafeNativeMethods.MapVirtualKey(
(uint)(message.LParam.ToInt32() & 0x00FF0000) >> 16,
(uint)UnsafeNativeMethods.MapType.ScanCodeToVirtualKeyEx
)
);
break;
}
case 0x11: { // VK_CONTROL
bool isExtendedKey = (message.LParam.ToInt32() & (1 << 24)) != 0;
if (isExtendedKey)
{
OnKeyReleased(Keys.RightControl);
}
else
{
OnKeyReleased(Keys.LeftControl);
}
break;
}
case 0x12: { // VK_MENU
bool isExtendedKey = (message.LParam.ToInt32() & (1 << 24)) != 0;
if (isExtendedKey)
{
OnKeyReleased(Keys.RightAlt);
}
else
{
OnKeyReleased(Keys.LeftAlt);
}
break;
}
default: {
OnKeyReleased((Keys)virtualKeyCode);
break;
}
}
return(true); // consumed!
}
// Character has been entered on the keyboard
case (int)UnsafeNativeMethods.WindowMessages.WM_CHAR: {
char character = (char)message.WParam.ToInt32();
OnCharacterEntered(character);
return(true); // consumed!
}
// Mouse has been moved
case (int)UnsafeNativeMethods.WindowMessages.WM_MOUSEMOVE: {
if (!this.trackingMouse)
{
int result = UnsafeNativeMethods.TrackMouseEvent(ref this.mouseEventTrackData);
Debug.Assert(
result != 0,
"Could not set up registration for mouse events",
"The TrackMouseEvent() function failed, which means the game will not " +
"detect when the mouse leaves the game window. This might result in " +
"the assumed mouse position remaining somewhere near the window border " +
"even though the mouse has been moved away from the game window."
);
this.trackingMouse = (result != 0);
}
short x = (short)(message.LParam.ToInt32() & 0xFFFF);
short y = (short)(message.LParam.ToInt32() >> 16);
OnMouseMoved((float)x, (float)y);
break;
}
// Left mouse button pressed / released
case (int)UnsafeNativeMethods.WindowMessages.WM_LBUTTONDOWN:
case (int)UnsafeNativeMethods.WindowMessages.WM_LBUTTONDBLCLK: {
OnMouseButtonPressed(MouseButtons.Left);
break;
}
case (int)UnsafeNativeMethods.WindowMessages.WM_LBUTTONUP: {
OnMouseButtonReleased(MouseButtons.Left);
break;
}
// Right mouse button pressed / released
case (int)UnsafeNativeMethods.WindowMessages.WM_RBUTTONDOWN:
case (int)UnsafeNativeMethods.WindowMessages.WM_RBUTTONDBLCLK: {
OnMouseButtonPressed(MouseButtons.Right);
break;
}
case (int)UnsafeNativeMethods.WindowMessages.WM_RBUTTONUP: {
OnMouseButtonReleased(MouseButtons.Right);
break;
}
// Middle mouse button pressed / released
case (int)UnsafeNativeMethods.WindowMessages.WM_MBUTTONDOWN:
case (int)UnsafeNativeMethods.WindowMessages.WM_MBUTTONDBLCLK: {
OnMouseButtonPressed(MouseButtons.Middle);
break;
}
case (int)UnsafeNativeMethods.WindowMessages.WM_MBUTTONUP: {
OnMouseButtonReleased(MouseButtons.Middle);
break;
}
// Extended mouse button pressed / released
case (int)UnsafeNativeMethods.WindowMessages.WM_XBUTTONDOWN:
case (int)UnsafeNativeMethods.WindowMessages.WM_XBUTTONDBLCLK: {
short button = (short)(message.WParam.ToInt32() >> 16);
if (button == 1)
{
OnMouseButtonPressed(MouseButtons.X1);
}
if (button == 2)
{
OnMouseButtonPressed(MouseButtons.X2);
}
break;
}
case (int)UnsafeNativeMethods.WindowMessages.WM_XBUTTONUP: {
short button = (short)(message.WParam.ToInt32() >> 16);
if (button == 1)
{
OnMouseButtonReleased(MouseButtons.X1);
}
if (button == 2)
{
OnMouseButtonReleased(MouseButtons.X2);
}
break;
}
// Mouse wheel rotated
case (int)UnsafeNativeMethods.WindowMessages.WM_MOUSEHWHEEL: {
short ticks = (short)(message.WParam.ToInt32() >> 16);
OnMouseWheelRotated((float)ticks / 120.0f);
break;
}
// Mouse has left the window's client area
case (int)UnsafeNativeMethods.WindowMessages.WM_MOUSELEAVE: {
OnMouseMoved(-1.0f, -1.0f);
this.trackingMouse = false;
break;
}
}
return(false);
}
