C++ WinAPI TextOut() update text
Question
So I'm creating a Windows application with WinAPI, and I'm using the TextOut() function while handling WM_PAINT in order to write text on the window.
case WM_PAINT:
{
PAINTSTRUCT ps;
HDC hdc;
hdc = BeginPaint(hwnd,&ps);
SelectObject(hdc,hfDefault);
TextOut(hdc,10,70,"Points: 0",9);
TextOut(hdc,10,85,"Level: 0",8);
// ...
EndPaint(hwnd,&ps);
}
break;
How can I change the text printed by TextOut() after the function is called as well as the last parameter that determines the length of the printed text?
I have Googled about this, but for my surprise I could not find anything related. Everything asked about TextOut() was about the text font.
Solution
Maybe something like this....
// I'll assume hwnd is global
void OnSomeActionToRefreshValues()
{
HDC hdc = ::GetDc(hwnd);
DrawValues(hdc, 88, 99);
ReleaseDC(hdc);
}
void DrawValues(HDC hdc, int points, int level)
{
// Might need a rectangle here to overwrite old text
SelectObject(hdc, hfDefault); // I assume hfDefault is global
TCHAR text[256];
swprintf_s(text, 256, L"Points: %d", points);
TextOut(hdc, 10, 70, text, wcslen(text));
swprintf_s(text, 256, L"Level: %d", level);
TextOut(hdc, 10, 85, text, wcslen(text));
}
And in you win proc:
case WM_PAINT:
PAINTSTRUCT ps;
HDC hdc;
hdc = BeginPaint(hwnd,&ps);
DrawValues(hdc, 88, 99);
EndPaint(hwnd,&ps);
break;
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