C# 如何检查鼠标指针是否可见?
在C#.Net中是否有方法检查鼠标指针是否可见? (例如,在触摸设备上) 还是它的符号类型? (指针,加载圆,隐藏)看看如何使用 表示鼠标光标的光标如果出现以下情况,则默认值为null 鼠标光标不可见。 大概是C# 如何检查鼠标指针是否可见?,c#,.net,C#,.net,在C#.Net中是否有方法检查鼠标指针是否可见? (例如,在触摸设备上) 还是它的符号类型? (指针,加载圆,隐藏)看看如何使用 表示鼠标光标的光标如果出现以下情况,则默认值为null 鼠标光标不可见。 大概是 Cursor current = Cursor.Current; if(current == null) //the cursor is not visible else //the cursor is visible 财产价值 类型:System.Windows.
Cursor current = Cursor.Current;
if(current == null)
//the cursor is not visible
else
//the cursor is visible
财产价值
类型:System.Windows.Forms.Cursor
表示鼠标光标的光标。如果鼠标光标不可见,则默认值为null
因此,这段代码应该完成以下工作:
If (Cursor.Current == null)
{
// cursor is invisible
}
else
{
// cursor is visible
}
您可以使用
System.Windows.Forms.Cursor
类获取信息
使用Cursor.Current
属性
if (Cursor.Current == null)
{
//
}
如果您谈论的是WPF变体,那么框架元素的游标属性应该是
None
,如果它不可见。我根据经验发现Cursor.Current==null不表示游标隐藏状态(Windows 10 Pro、.Net 4.7、Windows.Forms,2020.04.07)
为了澄清问题,我想检查(而不是设置)光标隐藏状态,因为这似乎是可靠检测鼠标事件是由鼠标/触摸板(光标可见)还是手指触摸(光标不可见)引发的唯一方法
潜入Win32调用可以成功检查此状态:
#region Cursor info
public static class CursorExtensions {
[StructLayout(LayoutKind.Sequential)]
struct PointStruct {
public Int32 x;
public Int32 y;
}
[StructLayout(LayoutKind.Sequential)]
struct CursorInfoStruct {
/// <summary> The structure size in bytes that must be set via calling Marshal.SizeOf(typeof(CursorInfoStruct)).</summary>
public Int32 cbSize;
/// <summary> The cursor state: 0 == hidden, 1 == showing, 2 == suppressed (is supposed to be when finger touch is used, but in practice finger touch results in 0, not 2)</summary>
public Int32 flags;
/// <summary> A handle to the cursor. </summary>
public IntPtr hCursor;
/// <summary> The cursor screen coordinates.</summary>
public PointStruct pt;
}
/// <summary> Must initialize cbSize</summary>
[DllImport("user32.dll")]
static extern bool GetCursorInfo(ref CursorInfoStruct pci);
public static bool IsVisible(this Cursor cursor) {
CursorInfoStruct pci = new CursorInfoStruct();
pci.cbSize = Marshal.SizeOf(typeof(CursorInfoStruct));
GetCursorInfo(ref pci);
// const Int32 hidden = 0x00;
const Int32 showing = 0x01;
// const Int32 suppressed = 0x02;
bool isVisible = ((pci.flags & showing) != 0);
return isVisible;
}
}
#endregion Cursor info
WPF、WinForm、Silverlight/Store、HTML,哪个?一个“等待”光标是可见的。
bool isTouch = !Cursor.Current.IsVisible();