问题描述
如何为我的应用程序禁用 Windows 7 的捕捉功能(以编程方式)?或者有什么方法可以检测应用程序是否已被捕捉,并专门调用 API 函数来取消捕捉?
How can I disable the snap feature of Windows 7 for my application (progmatically)? Or is there any way to detect if the application has been snapped, and specifically call an API function to unsnap it?
调用 SetWindowPos() 或 ShowWindow() 不能正确解开它*(SW_MAXIMIZE 可以).调用 SetWindowPos() 实际上会导致以后调用 SetWindowPos() 和 MoveWindow() 时出现奇怪的行为.同样的不一致不适用于最大化的窗口.
Calling SetWindowPos() or ShowWindow() does not unsnap it correctly *(SW_MAXIMIZE does). Calling SetWindowPos() actually causes strange behavior in future calls to SetWindowPos() and MoveWindow(). The same inconsistencies do not apply to a window that is maximized.
推荐答案
#define WM_RESTOREORIGINALSTYLE WM_USER+... /* your first free USER message */
case WM_SYSCOMMAND:
{
if(wParam==(SC_MOVE|2)) wParam=SC_SIZE|9;
if((wParam&0xFFE0)==SC_SIZE && (wParam&0x000F)) // handles MOVE and SIZE in one "if"
{
long int oldStyle=GetWindowLongW(hwnd,GWL_STYLE);
PostMessageW(hwnd,WM_RESTOREORIGINALSTYLE,GWL_STYLE,oldStyle);
SetWindowLongW(hwnd,GWL_STYLE,oldStyle &0xFEFEFFFF); // disable WS_MAXIMIZE and WS_MAXIMIZEBOX
DefWindowProcW(hwnd,WM_SYSCOMMAND,wParam,lParam);
return 0;
}
return DefWindowProcW(hwnd,WM_SYSCOMMAND,wParam,lParam);
}
case WM_RESTOREORIGINALSTYLE:
{
if((long int)wParam==GWL_STYLE)
SetWindowLongW(hwnd,GWL_STYLE,lParam);
return 0;
}
PostMessage 将在随后的消息循环中处理 - 这意味着进入移动大小循环后尽快.如果您使用自己的框架绘制方法,请不要忘记在 WM_STYLECHANGED
消息中正确重绘您的框架,内部将 oldStyle 存储在您的类中.为什么有效?Windows 在移动/大小操作开始时检查捕捉条件.如果 WS_MAXIMIZE
和 WS_MAXIMIZEBOX
在开始时被禁用,则捕捉行为被禁用.
The PostMessage will be processed in subsequent message loop - it means ASAP after entering into move-size loop.If you use own drawing method of frame, please do not forget to redraw your frame correctly on WM_STYLECHANGED
message, internally store oldStyle in your class.Why it works? Windows check snap condition at start of move/size action. If WS_MAXIMIZE
and WS_MAXIMIZEBOX
are disabled at start, the snap behaviour is disabled.
SC_SIZE|9
等价于 SC_MOVE|2
没有阻塞重绘半秒.
The SC_SIZE|9
is equivalent of SC_MOVE|2
without blocking redrawing for half a second.
如果你不想在完全最大化的情况下启用拖动最大化窗口,请检查系统菜单中SC_MOVE项的状态,如果启用,则在WM_SYSCOMMAND
中直接返回0.
If you don't want to enable dragging maximized windows if they are fully maximized, check state of SC_MOVE item in system menu and if it is enabled, directly return 0 in WM_SYSCOMMAND
.
已在 Windows 8.1 上验证.
Verified on Windows 8.1.
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