我目前正在学习winapi,并希望就如何使用不同的窗口程序设置自定义控件获得一些建议。
假设我有20个按钮。当鼠标悬停在按钮上时,我希望每个按钮的响应方式不同。比如说,“退出”按钮在悬停时绘制一个红色矩形,或者在其他一些按钮悬停时绘制蓝色。
因此,我设置了一个自定义控制程序来处理鼠标点击,鼠标悬停等,并存储在custom.cpp
中。在main.cpp
中,有一个MainProc()
使用
hwndButton
到ButtonProc()
CustomProcHandler = (WNDPROC)SetWindowLong(hwndButton, GWL_WNDPROC, (long)CustomProc)
main.h:
#include <windows.h>
#include <iostream>
using namespace std;
const char g_szClassName[] = "Applicaton";
static HWND hwnd, hwndButton;
static HINSTANCE hInst;
static WNDPROC buttonProcHandler;
LRESULT CALLBACK MainProc(HWND, UINT, WPARAM, LPARAM);
LRESULT CALLBACK ButtonProc(HWND, UINT, WPARAM, LPARAM);
main.cpp中:
#include "main.h"
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR nCmdLine, int nCmdShow){
WNDCLASSEX wc;
MSG msg;
hInst = hInstance;
wc.cbSize = sizeof(WNDCLASSEX);
wc.style = 0;
wc.lpfnWndProc = WndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hInst;
wc.hIcon = LoadIcon(hInst, 0);
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = CreateSolidBrush(RGB(20, 20, 20));
wc.lpszMenuName = 0;
wc.lpszClassName = g_szClassName;
wc.hIconSm = LoadIcon(hInst, 0);
RegisterClassEx(&wc);
hwnd = CreateWindowEx(
WS_EX_CLIENTEDGE,
g_szClassName,
"The title of my window",
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT, 600, 400,
NULL, NULL, hInst, NULL);
ShowWindow(hwnd, 1);
UpdateWindow(hwnd);
while (GetMessage(&msg, NULL, 0, 0)) {
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}
LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam){
switch(msg){
case WM_CREATE:
button = CreateWindow("button", 0, WS_CHILD | WS_VISIBLE | BS_OWNERDRAW, 10, 10, 32, 32, hwnd, 0, hInst, 0);
buttonProcHandler = (WNDPROC)SetWindowLong(hwndButton, GWL_WNDPROC, (long)ButtonProc);
break;
case WM_MOUSEMOVE:
break;
case WM_CLOSE:
DestroyWindow(hwnd);
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hwnd, msg, wParam, lParam);
}
return 0;
}
custom.cpp:
#include "main.h"
LRESULT CALLBACK ButtonProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam){
switch(msg){
case WM_CREATE:
break;
case WM_MOUSEMOVE:
break;
case WM_LBUTTONDOWN:
break;
default:
return CallWindowProc(buttonProcHandler, hwnd, msg, wParam, lParam);
}
return 0;
}
问题是按钮消失了...但是当我在buttonProc()
内移动main.cpp
时,一切正常。
所以,我猜测在声明像static WNDPROC buttonProcHandler
这样的全局变量时我做错了。
我知道我在做什么是完全错误的,并且有更好的方法。我只是不知道那是什么。
任何人都可以帮助/教我创建自定义程序的标准方法吗?