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first pass for mouse-button and -movement support, in Win32_SendInput #5

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first pass for mouse-button and -movement support, in Win32_SendInput #5

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2 changes: 1 addition & 1 deletion src/Win32_RawInput.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -532,7 +532,7 @@ internal static extern int HidP_GetUsages(//aka "GetButtonsCurrentlyPressedInThi
[In, Out] ref uint usageLength,
IntPtr pPreparsedData,
IntPtr refHidReportBuffer,
ulong reportLength
uint reportLength
);
}

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111 changes: 108 additions & 3 deletions src/Win32_SendInput.cs
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
/*
* Interop wrapper for programmatically generating keystroke, and manipulating mousewheel.
* Not done: mouse-move, mouse buttons.
* Interop wrapper for programmatically generating keystrokes, and manipulating mouse.
*
* TODO: test with multi-monitor.. coords relative to "primary" desktop? virtual desktop-space?
*/
using System;
using System.ComponentModel;
Expand All @@ -27,6 +28,50 @@ public static void SendKeystroke( ushort scanCode, bool keyDown, bool isExtended
return;
}

//----------------------------------------
public static void MoveMouseAbsolute( int x, int y )
{
//?: multiple monitors? virtual desktop?
_Interop_User32.InputStruct[] inputs = new _Interop_User32.InputStruct[] {
_PrepMousePosition(x, y, virtualCoords:true ) //?
};

int status = _Interop_User32.SendInput(inputs.Length, inputs, _Interop_User32.InputStruct.MarshalSize);
if (status != inputs.Length)
throw new Win32Exception();

return;
}

//----------------------------------------
public static void MoveMouseRelative( int dx, int dy )
{
_Interop_User32.InputStruct[] inputs = new _Interop_User32.InputStruct[] {
_PrepMouseMovement(dx, dy, virtualCoords:true ) //?
};

int status = _Interop_User32.SendInput(inputs.Length, inputs, _Interop_User32.InputStruct.MarshalSize);
if (status != inputs.Length)
throw new Win32Exception();

return;
}

//----------------------------------------
public static void SendMouseButton( int mouseButton, bool buttonDown )
{
//?: swap mouse buttons?
_Interop_User32.InputStruct[] inputs = new _Interop_User32.InputStruct[] {
_PrepMouseButton(mouseButton, buttonDown)
};

int status = _Interop_User32.SendInput(inputs.Length, inputs, _Interop_User32.InputStruct.MarshalSize);
if (status != inputs.Length)
throw new Win32Exception();

return;
}

//----------------------------------------
public static void MoveMouseWheel( int wheelDelta )
{
Expand All @@ -44,6 +89,56 @@ public static void MoveMouseWheel( int wheelDelta )
//--------------------------------------------------------------
// Managed helpers

static _Interop_User32.InputStruct _PrepMousePosition( int x, int y, bool virtualCoords )
{
_Interop_User32.InputStruct inputStruct = new _Interop_User32.InputStruct();
inputStruct.type = _Interop_User32.INPUT_MOUSE;
inputStruct._union.mouseInput.dx = x;
inputStruct._union.mouseInput.dy = y;
inputStruct._union.mouseInput.flags = (_Interop_User32.MOUSEEVENTF_MOVE | _Interop_User32.MOUSEEVENTF_ABSOLUTE);

if (virtualCoords)
inputStruct._union.mouseInput.flags |= _Interop_User32.MOUSEEVENTF_VIRTUALDESK;

return inputStruct;
}

static _Interop_User32.InputStruct _PrepMouseMovement( int dx, int dy, bool virtualCoords )
{
_Interop_User32.InputStruct inputStruct = new _Interop_User32.InputStruct();
inputStruct.type = _Interop_User32.INPUT_MOUSE;
inputStruct._union.mouseInput.dx = dx;
inputStruct._union.mouseInput.dy = dy;
inputStruct._union.mouseInput.flags = (_Interop_User32.MOUSEEVENTF_MOVE);

if (virtualCoords)
inputStruct._union.mouseInput.flags |= _Interop_User32.MOUSEEVENTF_VIRTUALDESK;

return inputStruct;
}

static _Interop_User32.InputStruct _PrepMouseButton( int mouseButton, bool buttonDown )
{
_Interop_User32.InputStruct inputStruct = new _Interop_User32.InputStruct();
inputStruct.type = _Interop_User32.INPUT_MOUSE;
switch (mouseButton)
{
case 0: //left
inputStruct._union.mouseInput.flags = buttonDown ? _Interop_User32.MOUSEEVENTF_LEFTDOWN : _Interop_User32.MOUSEEVENTF_LEFTUP;
break;
case 1: //right
inputStruct._union.mouseInput.flags = buttonDown ? _Interop_User32.MOUSEEVENTF_RIGHTDOWN : _Interop_User32.MOUSEEVENTF_RIGHTUP;
break;
case 2: //middle
inputStruct._union.mouseInput.flags = buttonDown ? _Interop_User32.MOUSEEVENTF_MIDDLEDOWN : _Interop_User32.MOUSEEVENTF_MIDDLEUP;
break;
default:
throw new ArgumentException();
}

return inputStruct;
}

static _Interop_User32.InputStruct _PrepMouseWheelDelta( int wheelDelta )
{
_Interop_User32.InputStruct inputStruct = new _Interop_User32.InputStruct();
Expand Down Expand Up @@ -79,8 +174,18 @@ static class _Interop_User32
internal const uint INPUT_MOUSE = 0;
internal const uint INPUT_KEYBOARD = 1;

internal const ushort MOUSEEVENTF_MOVE = 0x0001;
internal const ushort MOUSEEVENTF_LEFTDOWN = 0x0002;
internal const ushort MOUSEEVENTF_LEFTUP = 0x0004;
internal const ushort MOUSEEVENTF_RIGHTDOWN = 0x0008;
internal const ushort MOUSEEVENTF_RIGHTUP = 0x0010;
internal const ushort MOUSEEVENTF_MIDDLEDOWN = 0x0020;
internal const ushort MOUSEEVENTF_MIDDLEUP = 0x0040;
internal const ushort MOUSEEVENTF_WHEEL = 0x0800;

internal const ushort MOUSEEVENTF_VIRTUALDESK = 0x4000;
internal const ushort MOUSEEVENTF_ABSOLUTE = 0x8000;

internal const ushort KEYEVENTF_SCANCODE = 0x0008;
internal const ushort KEYEVENTF_KEYUP = 0x0002;
internal const ushort KEYEVENTF_EXTENDEDKEY = 0x0001;
Expand Down Expand Up @@ -108,7 +213,7 @@ internal struct InputStruct_union
[FieldOffset(0)]
internal KeybdInputStruct keybdInput;

//NB: This option seems unimplemented? And smaller size than others, so irrelevant.
//NB: This option seems unimplemented? And smaller size than others, so irrelevant as part of the union.
//[FieldOffset(0)]
//internal HARDWAREINPUT hi;
}
Expand Down