windows 如何暂时防止窗口调整大小？
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How to prevent window resizing temporarily?
提问by Suma
I have a window which can be resized, but there are some situations when resizing is not possible because of the application state. Is there a way to prevent resizing the window temporarily?
我有一个可以调整大小的窗口，但是在某些情况下，由于应用程序状态而无法调整大小。有没有办法暂时防止调整窗口大小？
I want to disable resizing by all means available to the users, which include window menu, dragging edges by mouse, user initiated window tiling performed by OS - and perhaps some other I am not aware of?
我想通过用户可用的所有方式禁用调整大小，包括窗口菜单、通过鼠标拖动边缘、由操作系统执行的用户启动的窗口平铺 - 也许还有其他一些我不知道的？
回答by Anders
To retain the look of the window border and still prevent re-size (and cursor change), catch WM_NCHITTEST, pass it to DefWindowProc, if the returned code is one of the size constants, change the real return to something else, HTCLIENT for example
为了保留窗口边框的外观并仍然防止重新调整大小（和光标更改），catch WM_NCHITTEST，将其传递给 DefWindowProc，如果返回的代码是大小常量之一，则将实际返回值更改为其他内容，例如 HTCLIENT
回答by Nick Dandoulakis
One way is to use GetWindowLong()with GWL_STYLEflag to get the window style and
reset/remove any stylesyou need, ie the WS_THICKFRAMEstyle so that the window can't be resized.
一种方法是使用带有标志的GetWindowLong()GWL_STYLE来获取窗口样式并
重置/删除您需要的任何样式，即WS_THICKFRAME无法调整窗口大小的样式。
You apply the new style with SetWindowLong.
您可以使用SetWindowLong应用新样式。
回答by Stefan
Another possibility is to handle the WM_GETMINMAXINFOmessage and set the MINMAXINFO struct so that both min and max size of the window is the current size. Then the user can't resize the window either.
另一种可能性是处理WM_GETMINMAXINFO消息并设置 MINMAXINFO 结构，以便窗口的最小和最大大小都是当前大小。然后用户也不能调整窗口大小。
回答by Suma
Following code in the window procedure seems to handle the case of user dragging the window edge/corner:
窗口过程中的以下代码似乎处理用户拖动窗口边缘/角落的情况：
case WM_SIZING:
RECT &rc = *(LPRECT) lParam;
RECT windowRect;
GetWindowRect(hwnd, &windowRect);
rc = windowRect;
return 0;
I did not find anything yet to prevent the system from resizing the window when tiling/cascading windows. I hoped following might do the trick, but it seems it does not:
我还没有发现任何东西可以阻止系统在平铺/级联窗口时调整窗口大小。我希望以下内容可以解决问题，但似乎没有：
case WM_SIZE:
return TRUE;
I guess I can find similar measure for other cases, but at least I would need to know the exhaustive list of messages which can result in a window changing its size.
我想我可以为其他情况找到类似的度量，但至少我需要知道可能导致窗口改变其大小的详尽消息列表。
Also, while this really prevents the window from resizing, I would rather prevent the user from even initiating the resize, than apparently letting him to resize and then refusing to do so.
此外，虽然这确实阻止了窗口调整大小，但我宁愿阻止用户甚至启动调整大小，也不愿让他调整大小然后拒绝这样做。
