c++ - 如何通过鼠标移动而不是 VK_SPACE 打开显示

Question

此代码禁用 2 个显示中的 1 个。任务不是通过 VK_SPACE 打开它，而是通过鼠标移动打开它。

我尝试通过 WM_MOUSEMOVE 来完成，但到目前为止没有任何效果。我真的不明白这个问题是如何实现的。

如果有机会实现这个主题，我将不胜感激。

#include <iostream>
#include <windows.h>
#include <vector>
#include <lowlevelmonitorconfigurationapi.h>
#include <windowsx.h>

#pragma comment(lib, "Dxva2.lib")

#define KEY_DOWN(key) ((::GetAsyncKeyState(key) & 0x80000) ? 1 : 0)
#define KEY_UP(key)   ((::GetAsyncKeyState(key) & 0x80000) ? 0 : 1)

const BYTE PowerMode = 0xD6;  // VCP Code defined in VESA Monitor Control Command Set (MCCS) standard
const DWORD PowerOn = 0x01;
const DWORD PowerOff = 0x04;

// Monitor description struct
struct MonitorDesc
{
    HANDLE hdl;
    DWORD power;
};

// Monitor enumeration callback
BOOL CALLBACK MonitorEnumProc(HMONITOR hMonitor, HDC hdcMonitor, LPRECT lprcMonitor, LPARAM dwData)
{
    std::vector<MonitorDesc>* pMonitors = reinterpret_cast<std::vector<MonitorDesc>*>(dwData);

    DWORD nMonitorCount;
    if (GetNumberOfPhysicalMonitorsFromHMONITOR(hMonitor, &nMonitorCount))
    {
        PHYSICAL_MONITOR* pMons = new PHYSICAL_MONITOR[nMonitorCount];

        if (GetPhysicalMonitorsFromHMONITOR(hMonitor, nMonitorCount, pMons))
        {
            for (DWORD i = 0; i < nMonitorCount; i++)
            {
                MonitorDesc desc;
                desc.hdl = pMons[i].hPhysicalMonitor;

                pMonitors->push_back(desc);
            }
        }
        delete[] pMons;
    }
    return TRUE;
}

// Switch monitor power
void MonitorSwitch(MonitorDesc& monitor, DWORD mode)
{
    if (monitor.power == mode)
        return;

    SetVCPFeature(monitor.hdl, PowerMode, mode);
    monitor.power = mode;
}

int main()
{
    // Скрытие консоли 

    HWND hWnd;
    AllocConsole();
    hWnd = FindWindowA("ConsoleWindowClass", NULL);
    ShowWindow(hWnd, 0);

    std::vector<MonitorDesc> monitors;
    EnumDisplayMonitors(NULL, NULL, &MonitorEnumProc, reinterpret_cast<LPARAM>(&monitors));

    // Init
    for (auto& monitor : monitors)
    {
        monitor.power = PowerOn;
    }

    // Here select the first one monitor as example
    MonitorDesc targetMonitor = monitors[0];

    while (1)
    {
        if (::GetAsyncKeyState('L') == -32767)
        {
            if (KEY_DOWN(VK_CONTROL) && KEY_DOWN(VK_MENU))
                // turn off
                if (targetMonitor.power == PowerOn)
                    MonitorSwitch(targetMonitor, PowerOff);

        }
        if (::GetAsyncKeyState(VK_SPACE) == -32767)
        {
            if (KEY_DOWN(VK_SPACE))
                // turn on
                MonitorSwitch(targetMonitor, PowerOn);
        }
        if (::GetAsyncKeyState('E') == -32767)
        {
            if (KEY_DOWN(VK_CONTROL))
                return 0;
        }
    }   
}

Answer 1

我使用 GetCursorPos获取实时鼠标位置，当鼠标越过显示器边缘时执行节能操作。这是我的代码，我详细注释了代码。

#include <iostream>
#include <windows.h>
#include <vector>
#include <lowlevelmonitorconfigurationapi.h>
#include <windowsx.h>

#pragma comment(lib, "Dxva2.lib")

#define KEY_DOWN(key) ((::GetAsyncKeyState(key) & 0x80000) ? 1 : 0)
#define KEY_UP(key)   ((::GetAsyncKeyState(key) & 0x80000) ? 0 : 1)


const BYTE PowerMode = 0xD6;  // VCP Code defined in VESA Monitor Control Command Set (MCCS) standard
const DWORD PowerOn = 0x01;
const DWORD PowerOff = 0x04;

// Monitor description struct
struct MonitorDesc
{
    HANDLE hdl;
    DWORD power;
};

// Monitor enumeration callback
BOOL CALLBACK MonitorEnumProc(HMONITOR hMonitor, HDC hdcMonitor, LPRECT lprcMonitor, LPARAM dwData)
{
    std::vector<MonitorDesc>* pMonitors = reinterpret_cast<std::vector<MonitorDesc>*>(dwData);

    DWORD nMonitorCount;
    if (GetNumberOfPhysicalMonitorsFromHMONITOR(hMonitor, &nMonitorCount))
    {
        PHYSICAL_MONITOR* pMons = new PHYSICAL_MONITOR[nMonitorCount];

        if (GetPhysicalMonitorsFromHMONITOR(hMonitor, nMonitorCount, pMons))
        {
            for (DWORD i = 0; i < nMonitorCount; i++)
            {
                MonitorDesc desc;
                desc.hdl = pMons[i].hPhysicalMonitor;

                pMonitors->push_back(desc);
            }
        }
        delete[] pMons;
    }
    return TRUE;
}

// Switch monitor power
void MonitorSwitch(MonitorDesc& monitor, DWORD mode)
{
    if (monitor.power == mode)
        return;

    SetVCPFeature(monitor.hdl, PowerMode, mode);
    monitor.power = mode;
}


int main()
{

    // Скрытие консоли 

    HWND hWnd;
    AllocConsole();
    hWnd = FindWindowA("ConsoleWindowClass", NULL);
    ShowWindow(hWnd, 1);

    std::vector<MonitorDesc> monitors;
    EnumDisplayMonitors(NULL, NULL, &MonitorEnumProc, reinterpret_cast<LPARAM>(&monitors));

    // Init
    for (auto& monitor : monitors)
    {
        monitor.power = PowerOn;
    }

    // Here select the first one monitor as example
    MonitorDesc targetMonitor = monitors[0];
    int currentMonitorID = 0; //need start this exe in monitors[0] 

    //Mouse position
    LONG zx = -1;
    LONG zy = -1;
    POINT ptB = { 0, 0 };

    while (1)
    {
        /*---------------------------------------------------------------*/
        /*-                          -                                  -*/
        /*-                          -                                  -*/
        /*-                          -                                  -*/
        /*-     monitors[0]          -             monitors[1]          -*/
        /*-                          -                                  -*/
        /*-                          -                                  -*/
        /*-                          -                                  -*/
        /*---------------------------------------------------------------*/
        /*                       {1919,1079}                             */

        LPPOINT xy = &ptB;   //Location variables
        GetCursorPos(xy);    //Gets the current mouse position        

        //If the mouse moves, (i.e. the current coordinates change to print out the coordinates) print out the coordinates.
        if ((zx != xy->x) || (zy != xy->y))
        {
            //Here you need to test the edge of your monitor[0]
            //After Test, delete this and Hide the console by ShowWindow(hWnd, 0)
            printf("x=%d,y=%d\n", xy->x, xy->y);
        }

        //The coordinate in the lower right corner of my monitor is {1919,1079}
        if (xy->x > 1919 && currentMonitorID == 0)
        {
            currentMonitorID = 1;
            MonitorSwitch(monitors[1], PowerOn);
            MonitorSwitch(monitors[0], PowerOff);
        }
        else if ( xy->x <= 1919 && currentMonitorID == 1)
        {
            currentMonitorID = 0;
            MonitorSwitch(monitors[0], PowerOn);
            MonitorSwitch(monitors[1], PowerOff);
        }

        /*if (::GetAsyncKeyState('L') == -32767)
        {
            if (KEY_DOWN(VK_CONTROL) && KEY_DOWN(VK_MENU))
                // turn off
                if (targetMonitor.power == PowerOn)
                    MonitorSwitch(targetMonitor, PowerOff);

        }
        if (::GetAsyncKeyState(VK_SPACE) == -32767)
        {
            if (KEY_DOWN(VK_SPACE))
                // turn on
                MonitorSwitch(targetMonitor, PowerOn);
        }*/
        if (::GetAsyncKeyState('E') == -32767)
        {
            if (KEY_DOWN(VK_CONTROL))
                return 0;
        }

    }
}