/// <summary>
/// 获取控件（包括其非工作区元素）相对于其父控件的大小和位置（以像素为单位）。
/// </summary>
/// <param name="hWnd">控件句柄。</param>
/// <returns>相对于父控件的 System.Drawing.Rectangle，表示控件（包括其非工作区元素）的大小和位置（以像素为单位）。</returns>
public static Rectangle GetBounds(IntPtr hWnd)
{
NativeMethods.RECT lpRect = new NativeMethods.RECT();
UnsafeNativeMethods.GetWindowRect(hWnd, ref lpRect);
//父窗口不为空转换坐标
IntPtr hWndParent = GetParent(hWnd);
if (hWndParent != IntPtr.Zero)
{
UnsafeNativeMethods.MapWindowPoints(NativeMethods.HWND_DESKTOP, hWndParent, ref lpRect, 2);
}
return(lpRect.ToRectangle());
}
/// <summary>
/// 获取该控件的左上角相对于其容器的左上角的坐标。
/// </summary>
/// <param name="hWnd">控件句柄。</param>
/// <returns>System.Drawing.Point，它表示控件的左上角相对于其容器的左上角。</returns>
public static Point GetLocation(IntPtr hWnd)
{
NativeMethods.RECT lpRect = new NativeMethods.RECT();
UnsafeNativeMethods.GetWindowRect(hWnd, ref lpRect);
NativeMethods.POINT pt = new NativeMethods.POINT(lpRect.left, lpRect.top);
//父窗口不为空转换坐标
IntPtr hWndParent = GetParent(hWnd);
if (hWndParent != IntPtr.Zero)
{
UnsafeNativeMethods.MapWindowPoints(NativeMethods.HWND_DESKTOP, hWndParent, ref pt, 1);
}
return(new Point(pt.x, pt.y));
}
/// <summary>
/// 获取窗口的客户区相对于窗口左上角的矩形.(特别注意:如果有非客户区起点一般不为0,0 如果没有非客户区该值同ClientRectangle相等).该函数非常特别尽量不要调用,在非客户区操作时可能使用到,其余问题请咨询编写人员. by Tim 2013.11.23
/// </summary>
/// <param name="hWnd">指定窗口句柄</param>
/// <returns>客户区相对于窗口坐标系的坐标和大小</returns>
public static NativeMethods.RECT GetClientRect(IntPtr hWnd)
{
NativeMethods.RECT wndRect = new NativeMethods.RECT(); //窗口相对于屏幕的坐标和大小
NativeMethods.RECT clientRect = new NativeMethods.RECT(); //以0,0开始的客户区坐标和大小
UnsafeNativeMethods.GetWindowRect(hWnd, ref wndRect); //窗口
UnsafeNativeMethods.GetClientRect(hWnd, ref clientRect); //客户区
UnsafeNativeMethods.MapWindowPoints(hWnd, NativeMethods.HWND_DESKTOP, ref clientRect, 2); //客户区映射到屏幕
//偏移
clientRect.left -= wndRect.left;
clientRect.top -= wndRect.top;
clientRect.right -= wndRect.left;
clientRect.bottom -= wndRect.top;
//返回
return(clientRect);
}
/// <summary>
/// 计算指定工作区矩形的大小和位置（以屏幕坐标表示）。
/// </summary>
/// <param name="hWnd">控件句柄。</param>
/// <param name="r">要转换的工作区坐标 System.Drawing.Rectangle。</param>
/// <returns>一个 System.Drawing.Rectangle，它表示转换后的 System.Drawing.Rectangle、r（以屏幕坐标表示）。</returns>
public static Rectangle RectangleToScreen(IntPtr hWnd, Rectangle r)
{
NativeMethods.RECT rect = new NativeMethods.RECT(r);
UnsafeNativeMethods.MapWindowPoints(hWnd, NativeMethods.HWND_DESKTOP, ref rect, 2);
return(rect.ToRectangle());
}
/// <summary>
/// 将指定工作区点的位置计算成屏幕坐标。
/// </summary>
/// <param name="hWnd">控件句柄。</param>
/// <param name="p">要转换的工作区坐标 System.Drawing.Point。</param>
/// <returns>一个 System.Drawing.Point，它表示转换后的 System.Drawing.Point、p（以屏幕坐标表示）。</returns>
public static Point PointToScreen(IntPtr hWnd, Point p)
{
NativeMethods.POINT pt = new NativeMethods.POINT(p.X, p.Y);
UnsafeNativeMethods.MapWindowPoints(hWnd, NativeMethods.HWND_DESKTOP, ref pt, 1);
return(new Point(pt.x, pt.y));
}
