Set caret to the beginning of EDIT control when focused
Как многим, наверное, известно, при получении фокуса элемент управления EDIT
выделяет весь текст и выполняет скроллиорвание таким образом, что на экране обязательно виден конец выделения. Если почитать внимательно документацию по сообщению EM_SETSEL
, можно сделать вывод, что это происходит по следующей причине: The control displays a flashing caret at the end position regardless of the relative values of start and end
. А что делать, если я хочу показать начало строки, а не ее конец? И зачем вообще по умолчанию показывать хвост длинной строки? Тем более, что убить это чертово умолчание
не так то просто...
Гугл, как обычно, ничего полезного в качестве решения не предложил. Везде написано, что это технически невозможно и т.д. А я для себя решение нашел.
// Set caret to the end, clear the selection Edit_SetSel(pFocusedWnd->m_hWnd, INT_MAX, INT_MAX); // Send Shift+Home or just Home if Shift is at pressed state INPUT inputs[4] = { 0 }; BOOST_FOREACH(INPUT &input, inputs) { input.type = INPUT_KEYBOARD; } // {SHIFT inputs[0].ki.wVk = VK_SHIFT; // {HOME inputs[1].ki.wVk = VK_HOME; // HOME} inputs[2].ki.wVk = VK_HOME; inputs[2].ki.dwFlags = KEYEVENTF_KEYUP; // SHIFT} inputs[3].ki.wVk = VK_SHIFT; inputs[3].ki.dwFlags = KEYEVENTF_KEYUP; bool shiftPressed = (GetKeyState(VK_SHIFT) < 0); SendInput(_countof(inputs) - int(shiftPressed) * 2, &inputs[int(shiftPressed)], sizeof(INPUT));
Этот код нужно выполнить сразу после получения элементом управления фокуса. Логика простая - переместить каретку в конец строки и выделить ее нажатием комбинации клавиш Shift+Home
. Только так можно выделить весь текст и поставить каретку в его начало! Здесь есть маленький нюанс - перемещение фокуса может осуществляться в обратном порядке и при этом клавиша Shift
находится в нажатом состоянии. Поэтому нужно делать проверку и не нажимать ее программно.
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