CODEWITHSUNDEEP
c++keyboard
Jai
Jai

Reputation: 1332

How to read key from keyboard in c++?

How to read key from keyboard in c++ ? i used _getch() but this is not working always.

i heard about win32 keyboard api. i am targeting to windows so window specific technique is fine. can anyone give me simple example how to read key and check for arrow and function key.

i read article How to simultaneous read keys on keyboard?

but this is not working in may case. here is my attempt inspired from above linked reference

char temp;
BYTE keys[256];
while(true)
{
    temp = _getch();
    if(GetKeyboardState(keys))
    {
        if(keys[VK_UP]&0xF0)
        {
            // Move Up : Case failing when i pressed up key
        }
        else if(keys[VK_DOWN]&0xF0 || keys[VK_RETURN]&0xF0)
        {
            // Move Down : Case failing when i pressed down or enter

        }
        else if(keys[VK_TAB]&0xF0)
        {
            // Move Next : Case failing when i pressed tab
        }
        else
        {
            // Print charecter which read using _getch()
            cout<<temp;
        }

    }
}

i read MSDN article but do not understand what they are doing. i am doing such program first time so please make your example clear and illustrative so i can easly get it. thanks

Upvotes: 0

Views: 4058

Answers (2)

Mohamed Hamzaoui
Mohamed Hamzaoui

Reputation: 345

there are many library in C++ which handle this type of problem, if you are the choice, I advise you to use QKeySequence and other classes to let useful keyboard management.

If you want to see example, refer you to chromium project, here is an example used to test code of "keyboard driver".

you can either search many example with "filetype" syntax in google search engine (example : filetype:cc GetKeyboardState)...

you need to set correctly the layout before use GetKeyboardState...

Hope this help you.

Regards,
/Mohamed

Upvotes: 0

Daniel
Daniel

Reputation: 179

I don't have a Windows machine at hand to test this out, but I am thinking that the fact that you are using temp = _getch(); before GetKeyboardState(keys) is eating your characters.

Upvotes: 1

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