CODEWITHSUNDEEP
c++winapi
szuniverse
szuniverse

Reputation: 1146

c++ custom button icon

I would like to make a button with dynamic width. Here is my code:

CreateWindowEx(BS_PUSHBUTTON, "BUTTON", "OK",
            WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON,
            50, 220, 100, 24, hwnd,
            (HMENU)ID_BUTTON,
            GetModuleHandle(NULL),
            0);

But if I change the label "OK" to "SOMETHING LONGER", then the button is not wide enough. How can I set dynamic width?

Upvotes: 1

Views: 635

Answers (1)

Alexander Shukaev
Alexander Shukaev

Reputation: 17019

Try Button_GetIdealSize macro.

OK, David, please next time supply more information, mention everything you don't understand, because from your questions in comments I can infer that you are not only unfamiliar with Win API, but you are also very new to the C/C++ programming in general.

HWND buttonHandle = CreateWindowEx(BS_PUSHBUTTON, "BUTTON", "OK",
                                   WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON,
                                   50, 220, 100, 24,
                                   hwnd,
                                   (HMENU)ID_BUTTON,
                                   GetModuleHandle(NULL),
                                   0);
SIZE size;

if (!Button_GetIdealSize(buttonHandle, &size)) {
  // Call of `Button_GetIdealSize` failed, do proper error handling here.
  // For that you have various options:
  // 1. Exit current scope and return error code;
  // 2. Throw an exception;
  // 3. Terminate execution of your application and print an error message.
  // Of course these options can be mixed.
  // If you don't understand what I'm talking about here, then either skip this
  // check or start reading books on software development with C/C++.
}

// At this point `size` variable was filled with proper dimensions.
// Now we can use it to actually resize our button...

if (!MoveWindow(buttonHandle, 50, 220, (int)size.cx, (int)size.cy, TRUE)) {
  // Call of `MoveWindow` failed, do proper error handling here, again.
}

// We are done!

NOTE: The title of your question is incorrectly posed. C++ has nothing to do with buttons and Win API in particular, which is pure C by the way. Much better title would be: Win API: How to properly resize a button to fit its contents?

Upvotes: 3

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