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www.mxdraw.com
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IMxDrawUtility::GetPoint 方法
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www.mxdraw.com
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与用户交互到在图上提取一个点
[helpstring("method GetPoint")]
HRESULT GetPoint([in] IMxDrawPoint* point, [in] BSTR prompt, [out,retval] IMxDrawPoint** pPoint);|
参数 |
说明 |
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[in] IMxDrawPoint* point |
交互提取时，前一个参考点，可以传为null |
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[in] BSTR prompt |
命令提示字符串 |
返回提取到的点,返回null表示没成功得到点
例如: Delphi中取一个点的例程代码
procedure TForm1.DoInsertFlagClick();
var
ptInsert : OleVariant;
pt : IMxDrawPoint ;
begin
ptInsert := mxUtility.GetPoint(EmptyParam,'点插入点');
pt:=IMxDrawPoint(IDisPatch(ptInsert));
if pt = nil then
EXIT;
MxDrawX1.InsertBlock(MxDrawX1.GetOcxAppPath() + 'blkTsgNote.dwg','Flag');
MxDrawX1.DrawBlockReference(pt.Get_x(),pt.Get_y(),'Flag',10.0,0.0);
end;
例如: C# 求两点距离
MxDrawUtility mxUtility = new MxDrawUtility(); MxDrawPoint point = (MxDrawPoint)(mxUtility.GetPoint(null, "点取第一点:") ); if (point == null) { MessageBox.Show("用户取消.."); return; } MxDrawPoint point2 = (MxDrawPoint)(mxUtility.GetPoint(point, "点取第二点:")); if (point2 == null) { MessageBox.Show("用户取消.."); return; } Double dDis = Math.Sqrt((point.x - point2.x) * (point.x - point2.x) + (point.y - point2.y) * (point.y - point2.y)); MessageBox.Show("两点距离:" + dDis.ToString());