CODEWITHSUNDEEP
c++winapi
Bob
Bob

Reputation: 327

Why does Win32 console cursor stop blinking after making the console full screen?

I have a Win32 console that is in full screen (windowed). Whenever it is in full screen, I noticed that the console cursor stopped blinking. It just stays as a blank line. I can type with it just fine. It just does not blink for some reason.

It starts off like this...

Console con("My Console"); 
con.setFullScreen(true); 
con.setFontSize(24); 

con.write("Enter your name: ");
std::string name = con.readLine();

I narrowed down that the problem is in setFullScreen(true).

This is the code used in that function (specific to full screen):

bool Console::setFullScreen(const bool fullScreen, const bool showScrollBarState, 
    const bool hideMouseCursor)
{
    HWND handle = getHandle();
    LONG style;

    if (fullScreen)
    {
        // Set the window style
        style = GetWindowLong(handle, GWL_STYLE);
        style &= ~(WS_BORDER | WS_CAPTION | WS_THICKFRAME);
        SetWindowLong(handle, GWL_STYLE, style);

        // Set the window to full screen (windowed mode)
        if (!ShowWindow(handle, SW_MAXIMIZE))
            return false; 
    } else { //…}

    return true;
}

I narrowed down to this line:

        // Set the window to full screen (windowed mode)
        if (!ShowWindow(handle, SW_MAXIMIZE))
            return false;

If I eliminate this line, a borderless window shows a blinking cursor. If I include this line, the cursor stops blinking. If I set it to SW_NORMAL, it shows a borderless console with a blinking cursor.

For reference, getHandle() has the following code:

HWND Console::getHandle()
{
    return GetConsoleWindow();
}

Please let me know. Thanks.

Upvotes: 0

Views: 499

Answers (1)

Bob
Bob

Reputation: 327

As Eryksun pointed out, this appears to be a bug in the WinAPI.

A solution I found for now appears to be call ShowWindow() with SW_MINIMIZE and then call it again with SW_SHOWMAXIMIZED.

For example,

// Set the window to full screen (windowed mode)
ShowWindow(handle, SW_MINIMIZE);
ShowWindow(handle, SW_SHOWMAXIMIZED);

After that, the cursor blinks again.

Upvotes: 2

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