windows - #include 什么关于窗口的代码，原始鼠标数据

Question

我发现以下帖子对我自己的项目非常有用。那么新手问题是:我必须包含什么才能使其正常工作？

链接: How to accurately measure mouse movement in inches or centimetres for a mouse with a known DPI

内容:

The following code registers the RAWINPUTDEVICE so it can be used in WM_INPUT.

RAWINPUTDEVICE Rid[1];
Rid[0].usUsagePage = HID_USAGE_PAGE_GENERIC;
Rid[0].usUsage = HID_USAGE_GENERIC_MOUSE; 
Rid[0].dwFlags = RIDEV_INPUTSINK;   
Rid[0].hwndTarget = hWnd;
RegisterRawInputDevices(Rid, 1, sizeof(Rid[0]);

以下代码实际上使用 Rid 变量来确定自上次启动 WM_INPUT 以来鼠标移动了多少像素。

case WM_INPUT: 
{
    UINT dwSize = 40;
    static BYTE lpb[40];

    GetRawInputData((HRAWINPUT)lParam, RID_INPUT, 
                    lpb, &dwSize, sizeof(RAWINPUTHEADER));

    RAWINPUT* raw = (RAWINPUT*)lpb;

    if (raw->header.dwType == RIM_TYPEMOUSE) 
    {
        int xPosRelative = raw->data.mouse.lLastX; // Could be 1, or could be more than 1
        int yPosRelative = raw->data.mouse.lLastY; // Could be 1, or could be more than 1!
    } 
    break;
}

Answer 1

我刚找到它。
#include "hidusage.h"

这里有一些定义

#define HID_USAGE_GENERIC_POINTER ((USAGE) 0x01)
#define HID_USAGE_GENERIC_MOUSE ((USAGE) 0x02)
#define HID_USAGE_GENERIC_JOYSTICK ((USAGE) 0x04)
#define HID_USAGE_GENERIC_GAMEPAD ((USAGE) 0x05)
#define HID_USAGE_GENERIC_KEYBOARD ((USAGE) 0x06)
#define HID_USAGE_GENERIC_KEYPAD ((USAGE) 0x07)
#define HID_USAGE_GENERIC_SYSTEM_CTL ((USAGE) 0x80)

typedef USHORT USAGE,*PUSAGE;