设置复选框选项C++

Question

我有以下代码，用C++编写，而不是有一个复选框说"显示标题"，我希望能够为不同/更多的复选框传递多个字符串。如何为 CreateWindowW 函数提供多个复选框的多个字符串？应该在选择函数还是WndProc函数中修改CreateWindowW函数？

void Select(vector<string>& ret)
{
HINSTANCE hInstance = NULL; //NULL = the current process
WNDCLASSW wc = { 0 };
MSG  msg;
wc.lpszClassName = L"Check Box";
wc.hInstance = hInstance;
wc.hbrBackground = GetSysColorBrush(COLOR_3DFACE);
wc.lpfnWndProc = WndProc;
wc.hCursor = LoadCursor(0, IDC_ARROW);
RegisterClassW(&wc);
CreateWindowW(wc.lpszClassName, L"Check Box",
WS_OVERLAPPEDWINDOW | WS_VISIBLE,
150, 150, 230, 150, 0, 0, hInstance, 0);
while (GetMessage(&msg, NULL, 0, 0)) {
TranslateMessage(&msg);
DispatchMessage(&msg);
}
//return (int)msg.wParam;
}
LRESULT CALLBACK WndProc(HWND hwnd, UINT msg,
WPARAM wParam, LPARAM lParam) {
bool checked = true;
switch (msg) {
case WM_CREATE:
CreateWindowW(L"button", L"Show Title",
WS_VISIBLE | WS_CHILD | BS_CHECKBOX,
20, 20, 185, 35, hwnd, (HMENU)1,
NULL, NULL);
CheckDlgButton(hwnd, 1, BST_CHECKED);
break;
case WM_COMMAND:
checked = IsDlgButtonChecked(hwnd, 1);
if (checked) {
CheckDlgButton(hwnd, 1, BST_UNCHECKED);
SetWindowTextW(hwnd, L"");
}
else {
CheckDlgButton(hwnd, 1, BST_CHECKED);
SetWindowTextW(hwnd, L"Check Box");
}
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
}
return DefWindowProcW(hwnd, msg, wParam, lParam);
}

编辑：这是新代码

void columnSelect(vector<string>& ret)
{
HINSTANCE hInstance = NULL; //NULL = the current process
WNDCLASSW wc = { 0 };
MSG  msg;
wc.lpszClassName = L"Check Box";
wc.hInstance = hInstance;
wc.hbrBackground = GetSysColorBrush(COLOR_3DFACE);
wc.lpfnWndProc = WndProc;
wc.hCursor = LoadCursor(0, IDC_ARROW);
RegisterClassW(&wc);
CreateWindowW(wc.lpszClassName, L"Check Box",
WS_OVERLAPPEDWINDOW | WS_VISIBLE,
150, 150, 230, 150, 0, 0, hInstance, &ret);
while (GetMessage(&msg, NULL, 0, 0)) {
TranslateMessage(&msg);
DispatchMessage(&msg);
}
//return (int)msg.wParam;
}
LRESULT CALLBACK WndProc(HWND hwnd, UINT msg,
WPARAM wParam, LPARAM lParam) {
bool checked = true;
switch (msg) {
case WM_CREATE: {
LPCREATESTRUCT lpcs = reinterpret_cast<LPCREATESTRUCT>(lParam);
vector<string> *strings = reinterpret_cast<vector<string>*>(lpcs->lpCreateParams);
for (int i = 0; i != strings->size(); i++)
{
CreateWindowA("button", (*strings)[i].c_str(),
WS_VISIBLE | WS_CHILD | BS_CHECKBOX,
20, 20, 185, 35, hwnd, (HMENU)1,
NULL, NULL);
CheckDlgButton(hwnd, 1, BST_CHECKED);
}

break;
}
case WM_COMMAND: {
checked = IsDlgButtonChecked(hwnd, 1);
if (checked) {
CheckDlgButton(hwnd, 1, BST_UNCHECKED);
SetWindowTextW(hwnd, L"");
}
else {
CheckDlgButton(hwnd, 1, BST_CHECKED);
SetWindowTextW(hwnd, L"Check Box");
}
break;
}
case WM_DESTROY: {
PostQuitMessage(0);
break;
}
}
return DefWindowProcW(hwnd, msg, wParam, lParam);
}

Answer 1

如何为CreateWindowW函数提供多个复选框的多个字符串？

CreateWindow()每次调用只能创建 1 个窗口/控件。 您必须手动拆分字符串，然后为每个单独的复选框分别调用CreateWindow()。

假设您的vector<string>包含复选框字符串，您可以通过lpParam参数CreateWindow()将vector传递给窗口，然后在WM_CREATE消息处理程序中访问它，例如：

void Select(vector<string>& ret)
{
...
CreateWindowW(..., &ret);
...
}
LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) {
switch (msg) {
case WM_CREATE: {
LPCREATESTRUCT lpcs = reinterpret_cast<LPCREATESTRUCT>(lParam);
vector<string> *strings = reinterpret_cast<vector<string>*>(lpcs->lpCreateParams);
// use strings as needed ...
break;
}
...
}
...
}