Question

我想创建一个动态宽度的按钮。这是我的代码：

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

但如果我将标签“OK”更改为“SOMETHING LONGER”，则按钮不够宽。如何设置动态宽度？

Answer 1

尝试Button_GetIdealSize macro。

好的，大卫，请下次提供更多信息，提及你不理解的一切，因为从评论中的问题我可以推断出你不仅不熟悉Win API，而且你也是C的新手/ C ++编程一般。

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!

注意：您的问题标题不正确。 C ++与按钮和Win API没有任何关系，顺便说一下，这是纯粹的C语言。更好的标题是： Win API：如何正确调整按钮的大小以适应其内容？

c ++自定义按钮图标

1 个答案: