在我的 WinAPI 应用程序中,我的子窗口中有一系列编辑控件。我希望用户能够通过按 Tab 键前进并按 Shift-Tab 键返回来在它们之间移动,但我似乎不知道如何使用WS_TABSTOP
与子窗口。我想要发生的是,当用户单击 Tab 键时,选择后续的编辑控件。但是,当我单击以下代码窗口中的选项卡时,光标就会消失。
这是一个最小的可重现示例:
//libraries
#pragma comment ("lib", "Comctl32.lib")
#pragma comment ("lib", "d2d1.lib")
#define WIN32_LEAN_AND_MEAN // Exclude rarely-used stuff from Windows headers
// Windows Header Files
#include <windows.h>
#include <CommCtrl.h>
// C RunTime Header Files
#include <vector>
#include <string>
#define IDS_APP_TITLE 103
#define IDI_PRACTICE 107
#define IDI_SMALL 108
#define IDC_PRACTICE 109
#define MAX_LOADSTRING 100
// Global Variables:
HINSTANCE hInst; // current instance
WCHAR szTitle[MAX_LOADSTRING]; // The title bar text
WCHAR szWindowClass[MAX_LOADSTRING]; // the main window class name
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);
LRESULT CALLBACK WndProcChild(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);
ATOM MyRegisterClass(HINSTANCE hInstance);
HWND childHWND;
HWND InitInstance(HINSTANCE hInstance, int nCmdShow);
int APIENTRY wWinMain(_In_ HINSTANCE hInstance,
_In_opt_ HINSTANCE hPrevInstance,
_In_ LPWSTR lpCmdLine,
_In_ int nCmdShow)
{
UNREFERENCED_PARAMETER(hPrevInstance);
UNREFERENCED_PARAMETER(lpCmdLine);
// Initialize global strings
LoadStringW(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
LoadStringW(hInstance, IDC_PRACTICE, szWindowClass, MAX_LOADSTRING);
MyRegisterClass(hInstance);
SetProcessDpiAwarenessContext(DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2);
// Perform application initialization:
HWND hWnd = InitInstance(hInstance, nCmdShow);
if(!hWnd)
{
return FALSE;
}
HACCEL hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_PRACTICE));
MSG msg;
// Main message loop:
while (GetMessage(&msg, nullptr, 0, 0))
{
if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
{
if (!IsDialogMessage(hWnd, &msg))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
}
return (int)msg.wParam;
}
LRESULT CALLBACK WndProcChild(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
case WM_CREATE:
{
HWND edit1 = CreateWindow(WC_EDIT, L"", WS_CHILD | WS_BORDER | WS_VISIBLE | WS_TABSTOP, 100, 100, 100, 100, hWnd, (HMENU)1, hInst, NULL);
HWND edit2 = CreateWindow(WC_EDIT, L"", WS_CHILD | WS_BORDER | WS_VISIBLE | WS_TABSTOP, 300, 100, 100, 100, hWnd, (HMENU)2, hInst, NULL);
break;
}
}
return DefWindowProc(hWnd, message, wParam, lParam);
}
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
return 0;
}
ATOM MyRegisterClass(HINSTANCE hInstance)
{
WNDCLASSEXW wcex;
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.style = CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc = WndProc;
wcex.cbClsExtra = 0;
wcex.cbWndExtra = 0;
wcex.hInstance = hInstance;
wcex.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_PRACTICE));
wcex.hCursor = LoadCursor(nullptr, IDC_ARROW);
wcex.hbrBackground = (HBRUSH)(GetStockObject(WHITE_BRUSH));
wcex.lpszMenuName = MAKEINTRESOURCEW(IDC_PRACTICE);
wcex.lpszClassName = L"Parent";
wcex.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));
//Child wnd class
WNDCLASSEXW wcexChild;
wcexChild.cbSize = sizeof(WNDCLASSEX);
wcexChild.style = CS_HREDRAW | CS_VREDRAW;
wcexChild.lpfnWndProc = WndProcChild;
wcexChild.cbClsExtra = 0;
wcexChild.cbWndExtra = 0;
wcexChild.hInstance = hInstance;
wcexChild.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_PRACTICE));
wcexChild.hCursor = LoadCursor(nullptr, IDC_ARROW);
wcexChild.hbrBackground = (HBRUSH)(GetStockObject(WHITE_BRUSH));
wcexChild.lpszMenuName = MAKEINTRESOURCEW(IDC_PRACTICE);
wcexChild.lpszClassName = L"Child";
wcexChild.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));
return RegisterClassExW(&wcexChild) && RegisterClassExW(&wcex);
}
HWND InitInstance(HINSTANCE hInstance, int nCmdShow)
{
hInst = hInstance; // Store instance handle in our global variable
HWND hWnd = CreateWindowW(L"Parent", L"PARENT", WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, nullptr, nullptr, hInstance, nullptr);
childHWND = CreateWindowW(L"Child", L"", WS_CHILD | WS_VISIBLE | WS_EX_CONTROLPARENT,
0, 0, 700, 700, hWnd, nullptr, hInstance, nullptr);
if (!hWnd)
{
return NULL;
}
ShowWindow(childHWND, nCmdShow);
UpdateWindow(childHWND);
ShowWindow(hWnd, nCmdShow);
UpdateWindow(hWnd);
return hWnd;
}