如何检查“鼠标指针”是否可见
本文关键字:鼠标指针 是否 何检查 检查 | 更新日期: 2023-09-27 18:07:49
在c#中有办法吗?Net检查鼠标指针是否可见?(就像在Touch设备上一样)
或者它的符号类型?(指针,加载圆,隐藏)
看看如何使用游标。当前
表示鼠标光标的游标。默认为空
比如
Cursor current = Cursor.Current;
if(current == null)
//the cursor is not visible
else
//the cursor is visible
我凭经验发现游标。Current == null是否not表示光标隐藏状态(Windows 10 Pro, . net 4.7, Windows. net)。形式,2020.04.07)。
为了澄清这个问题,我想检查(而不是设置)光标隐藏状态,因为这似乎是可靠地检测鼠标事件是由鼠标/触摸板(光标可见)还是通过手指触摸(光标不可见)引发的唯一方法。
进入Win32调用允许成功检查此状态:
#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
客户端代码现在非常方便:
bool isTouch = !Cursor.Current.IsVisible();
根据MSDN:
属性值类型:System.Windows.Forms.Cursor表示鼠标光标的光标。如果鼠标光标不可见,则默认为空。
所以这段代码应该完成工作:
If (Cursor.Current == null)
{
// cursor is invisible
}
else
{
// cursor is visible
}
您可以使用System.Windows.Forms.Cursor
类来获取信息;
使用Cursor.Current
属性!
if (Cursor.Current == null)
{
//
}
如果你谈论的是WPF的变体,那么光标属性的框架元素应该是None
,如果它是不可见的