/// <summary>
/// 根据当前长度和角度的输入情况,得到计算后的"悬停"位置;
/// </summary>
/// <param name="position">返回是否已经处理,以指示编辑工具是否继续处理</param>
/// <param name="currentHoverPosition">当前的悬停位置</param>
private Vector2D GetCalculatedHoverPosition(Vector2D currentHoverPosition)
{
var commitedLength = _lengthInteractionHandler.GetCommitedNumber();
var commitedAngle = _angleInteractionHandler.GetCommitedNumber();
//若长度和角度均未确定,则不能计算位置;
if (commitedLength == null && commitedAngle == null)
{
return(null);
}
//若角方向为顺时针方向,则反转角度值;
if (commitedAngle != null)
{
commitedAngle = _isClockWise ? -commitedAngle.Value : commitedAngle.Value;
commitedAngle = Extension.DegToRad(commitedAngle.Value);
}
if (HaveMousePositionTracker.MousePositionTracker.LastMouseDownPosition == null)
{
return(null);
}
var lastDownPosition = HaveMousePositionTracker.MousePositionTracker.LastMouseDownPosition;
var distanceVector = currentHoverPosition - lastDownPosition;
var distance = distanceVector.Modulus();
if (distance < Extension.SMALL_NUMBER)
{
return(null);
}
//若长度未限定,则根据角度设定悬停点;
if (commitedLength == null)
{
var x = Math.Cos(commitedAngle.Value) * distance;
var y = Math.Sin(commitedAngle.Value) * distance;
return(new Vector2D(x + lastDownPosition.X, y + lastDownPosition.Y));
}
//若角度未限定,则根据长度设定悬停点;
else if (commitedAngle == null)
{
var destination = lastDownPosition + distanceVector.Normalize() * commitedLength.Value;
return(destination);
}
///若均已经限定,则<param name="currentHoverPosition"/>将被忽略;
///悬停点将全由本类字段决定;
else
{
var length = commitedLength.Value;
var angle = commitedAngle.Value;
var x = Math.Cos(commitedAngle.Value) * length;
var y = Math.Sin(commitedAngle.Value) * length;
return(new Vector2D(x + lastDownPosition.X, y + lastDownPosition.Y));
}
}
/// <summary>
/// 根据当前长度和角度的输入情况,得到计算后的"悬停"位置;
/// </summary>
/// <param name="position">返回是否已经处理,以指示编辑工具是否继续处理</param>
/// <param name="currentHoverPosition">当前的悬停位置</param>
private Vector2D GetCalculatedHoverPosition(Vector2D currentHoverPosition)
{
var commitedLength = _lengthInteractionHandler.GetCommitedNumber();
//若长度未确定,则不能计算位置;
if (commitedLength == null)
{
return(null);
}
if (HaveMousePositionTracker.MousePositionTracker.LastMouseDownPosition == null)
{
return(null);
}
var lastDownPosition = HaveMousePositionTracker.MousePositionTracker.LastMouseDownPosition;
var distanceVector = currentHoverPosition - lastDownPosition;
var distance = distanceVector.Modulus();
if (distance < Extension.SMALL_NUMBER)
{
return(null);
}
var length = commitedLength.Value;
var destination = lastDownPosition + distanceVector.Normalize() * commitedLength.Value;
return(destination);
}
