Question

我已经在visual-c ++中创建了一个win32应用程序，但是这个不打印鼠标的程序会协调所有其他正常工作的事件可以告诉我如何在visual-c ++ win32应用程序中获取鼠标坐标吗？

希望得到快速和积极的回应。

// ttt.cpp : Defines the entry point for the application.
//  TO Demonstrate the Mouse Events

#include "windows.h"
#include "stdafx.h"
#include "stdio.h"


LRESULT CALLBACK WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
    int x,y;
    LPCWSTR msgdown = (LPCWSTR)L"Left Mouse Button Down" ;
    LPCWSTR msgup = (LPCWSTR)L"Left Mouse Button UP" ;
    LPCWSTR msgdblclk = (LPCWSTR)L"Left Mouse Button Dbl clk" ;

    LPCWSTR rmsgdown = (LPCWSTR)L"Right Mouse Button Down" ;
    LPCWSTR rmsgup = (LPCWSTR)L"Right Mouse Button UP" ;
    LPCWSTR rmsgdblclk = (LPCWSTR)L"Right Mouse Button Dbl clk" ;

    LPCWSTR rwheel = (LPCWSTR)L"Mousescroll" ;
    //LPCWSTR txtmsg = (LPCWSTR)L"position" ;
    LPCWSTR mouse = (LPCWSTR)L"Mouse" ;
    switch (msg)
    {
        case WM_CLOSE:
        DestroyWindow(hWnd);
        break;

        case WM_DESTROY:
        PostQuitMessage(0);
        break;

        case WM_LBUTTONDOWN:
        MessageBox(hWnd,msgdown,mouse,MB_OK);

        break;

        case WM_LBUTTONUP:
            MessageBox(hWnd,msgup,mouse,MB_OK);
        break;

        case WM_LBUTTONDBLCLK:
        MessageBox(hWnd,msgdblclk,mouse,MB_OK);
        break;      

        case WM_RBUTTONUP:
        MessageBox(hWnd,rmsgup,mouse,MB_OK);
        break;

        case WM_RBUTTONDOWN:
        MessageBox(hWnd,rmsgdown,mouse,MB_OK);
        break;

        case WM_RBUTTONDBLCLK:
        MessageBox(hWnd,rmsgdblclk,mouse,MB_OK);
        break;

        case WM_MOUSEWHEEL:
        MessageBox(hWnd,rwheel,mouse,MB_OK);
        break;


        char text[50];
        POINT p;
        sprintf(text,"Mouse Position: X=%d, Y=%d",p.x,p.y);
        LPCWSTR textmsg = (LPCWSTR)text;
        SetWindowText(hWnd,textmsg);
        break;


        /*POINT pt;
        GetCursorPos(&pt);

        int a = (int)pt.x;
        int b = (int)pt.y;*/
    }
        return DefWindowProc(hWnd, msg, wParam, lParam);
}

int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpCmdLine,int nShowCmd)
{
    LPCTSTR className=(LPCTSTR)"Mouse Test";
    WNDCLASSEX wc;

    wc.cbSize =sizeof(WNDCLASSEX);
    wc.style =CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS;
    wc.lpfnWndProc =WndProc;
    wc.cbClsExtra =0;
    wc.cbWndExtra = 0;
    wc.hInstance = hInstance;
    wc.hIcon = LoadIcon(NULL,IDI_WINLOGO);
    wc.hCursor = LoadCursor(NULL,IDC_ARROW);
    wc.hbrBackground = (HBRUSH)(COLOR_WINDOW +1);
    wc.lpszMenuName = NULL;
    wc.lpszClassName = className;
    wc.hIconSm = LoadIcon(NULL,IDI_WINLOGO);

    MessageBoxA(NULL,"mouse events","mouse",MB_OK);



    if(!RegisterClassEx(&wc))
    {
        MessageBox(NULL,(LPCWSTR)"Error Registering Class",(LPCWSTR)"Error RegisterClassEx",MB_OK | MB_ICONERROR);
        return 1;
    }

    HWND hwmd = CreateWindowEx(0,className,(LPCWSTR)L"Mouse Test",WS_OVERLAPPEDWINDOW,CW_USEDEFAULT,CW_USEDEFAULT,400,300,NULL,NULL,hInstance,NULL);
    ShowWindow(hwmd,SW_SHOWDEFAULT);
    UpdateWindow(hwmd);


    if(!hwmd)
    {
        MessageBox(NULL,(LPCWSTR)"Error Creating Window",(LPCWSTR)"Error CreateWindowEx",MB_OK | MB_ICONERROR);
        return 1;
    }

        MSG msg;

    while(GetMessage(&msg,NULL,0,0)>0)
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    return (int)msg.wParam;
}

Answer 1

正如我在评论中所提到的，以下代码块1）永远不会到达，2）即使你可以访问它也不会工作：

case WM_MOUSEWHEEL:
        MessageBox(hWnd,rwheel,mouse,MB_OK);
        break;


        char text[50]; // no case to get you here!
        POINT p;
        sprintf(text,"Mouse Position: X=%d, Y=%d",p.x,p.y);
        LPCWSTR textmsg = (LPCWSTR)text; // will not work!
        SetWindowText(hWnd,textmsg);
        break;

Answer 2

具体来说，在WM_MOUSEWHEEL消息中，光标坐标在lParam中传递。 LOWORD(lParam)为x，HIWORD(lParam)为y。坐标是相对于屏幕而不是窗口。使用ScreenToClient（）进行转换。

WM_xBUTTONDOWN / UP和WM_MOUSEMOVE中lParam的含义相同，但坐标是相对于窗口的客户区域的。

Answer 3

使用GetCursorInfo()在任何时间点获取鼠标的位置。如果您只想在鼠标实际移动时进行跟踪，请处理WM_MOUSEMOVE。

See this上一个问题/答案以获取更多信息。

正如其他人所说，你需要用你的字符串修复你的Unicode / char *问题。

visual-c ++ win32应用程序中的鼠标坐标？

3 个答案: