I'm creating Win32 control:
m_progress = CreateWindowExW(0, PROGRESS_CLASSW, L"ProgressBar", WS_VISIBLE | WS_CHILD | WS_TABSTOP, 153, 339, 135, 33, m_window, (HMENU)0, m_instance, 0);
SendMessageW(m_progress, WM_SETFONT, (WPARAM)m_fontBold, TRUE);
SendMessageW(m_progress, PBM_SETRANGE, 0, MAKELPARAM(0, 100));
It's working, but I also want to draw text with percentage on it So I've subclassed progress control like this:
m_progressPrevProc = (WNDPROC)SetWindowLongPtrW(m_progress, GWLP_WNDPROC, (LONG_PTR)ProgressMsgProcessor);
...
static LRESULT CALLBACK ProgressMsgProcessor(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam)
{
if (msg == WM_PAINT)
{
PAINTSTRUCT ps;
RECT rc = { 5, 5, 135, 33 };
//HDC hdc = BeginPaint(hwnd, &ps);
//SelectObject(hdc, g_App.m_fontBold);
//DrawTextA(hdc, "100 %", -1, &rc, DT_SINGLELINE | DT_CENTER | DT_VCENTER);
//EndPaint(hwnd, &ps);
}
return CallWindowProcW((WNDPROC)PrevWndProcProzess, hwnd, msg, wparam, lparam);
}
But if uncomment atleast "HDC hdc = BeginPaint(hwnd, &ps);" then text appears, but default control absolutely disappears (like it's not drawn) How can I fix it to show default windows control with text on it, because I don't need to draw custom control, only add overlay text? Thank you
The problem here is that you cleared the update region with your
BeginPaint
andEndPaint
calls, so the progress bar doesn't think it has to draw anything. It's a weakness of the wayWM_PAINT
works that you can't paint over an existing control in this way. Instead, you have to do something like this:Other notes: