maptip.cs

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using System;

namespace MainSystem
{
	/// <summary>
	/// Summary description for MapTip.
	/// </summary>
	public class MapTip
	{
		private double	m_x;			// 当前位置的x坐标
		private double	m_y;			// 当前位置的y坐标
		private double	m_lastX;		// 当计时开始时鼠标位置的x坐标
		private double	m_lastY;		// 当计时开始时鼠标位置的y坐标

		private AxMapObjects2.AxMap					m_map = null;
		private System.Windows.Forms.Timer			m_timer = null;
		private System.Windows.Forms.PictureBox		m_picture = null;
		private System.Windows.Forms.Label			m_lable = null;
		private CEnvironment						m_env = null;
		private string								m_szField = "";   

		public MapTip(frmMain frm)
		{
			m_map	= frm._map;
			m_timer	= frm._timer;
			m_picture = frm._picToolTip;
			m_lable = frm._lblToolTip;
			m_szField = "名称";
			m_env = frm._environment; 
			m_picture.Visible = false;
			m_picture.BackColor = System.Drawing.Color.FromArgb(((System.Byte)(255)), ((System.Byte)(255)), ((System.Byte)(192)));
  
			m_lable.AutoSize = true;
			m_lable.BackColor = m_picture.BackColor;
			m_lable.Visible = false;
		}

		public void MouseMove(double X, double Y)
		{
			m_x = X;
			m_y = Y;

			if (m_timer.Interval == 1)
			{
				m_lastX = X;
				m_lastY = Y;
				m_timer.Interval = 100;
			}
			else
			{
				m_picture.Visible = false;
				m_lable.Visible = false;
			}
		}

		private void ShowTipText(string text)
		{
			// 设置标签控件的显示内容与位置
			m_lable.Text = text;
			m_lable.Left = m_map.Left + (int)m_x+20;
			m_lable.Top = m_map.Top + (int)m_y + 11;
 
			// 设置Picture控件的位置
			m_picture.Left = m_map.Left + (int)m_x + 10;
			m_picture.Top = m_map.Top + (int)m_y + 10;
			m_picture.Width = m_lable.Width + 20;
			m_picture.Visible = true;
			m_lable.Visible = true;
		}

		private bool InMap(double x, double y)
		{
			if (x > m_map.Right || x < m_map.Left)
				return false;

			if (y > m_map.Top || y < m_map.Bottom)
				return false;

			return true;
		}

		public void Timer()
		{
			if (m_x == m_lastX && m_y == m_lastY)
			{
				m_timer.Interval = 1;

				MapObjects2.Recordset recs;
				recs = DoSearch();
				if (recs == null || recs.EOF || InMap(m_x,m_y))
				{
					m_picture.Visible = false;
					m_lable.Visible = false;
				}
				else
				{
					string szText = recs.Fields.Item (m_szField).Value.ToString();
					if (szText != "")
						ShowTipText(recs.Fields.Item (m_szField).Value.ToString());
				}
			}
			else
			{
				m_lastX = m_x;
				m_lastY = m_y;
			}
		}

		private MapObjects2.Recordset DoSearch()
		{
			MapObjects2.Point		pt = null;
			MapObjects2.Recordset rst = null;

			pt = this.m_map.ToMapPoint((float)m_x,(float)m_y);  
			double dScale = m_env.CalcScale(m_map);
			dScale = dScale/10000;
			dScale = dScale / 5000;

			/*for (int i = m_env.m_nLayerNum - 1; i >= 0 ; i --)
			{
				//if (m_env.m_layerInfos[i].layer.Visible && m_env.m_layerInfos[i].bCanSelected && m_env.m_layerInfos[i].layer.shapeType == MapObjects2.ShapeTypeConstants.moShapeTypePoint)
					//rst = m_env.m_layerInfos[i].layer.SearchByDistance(pt,dScale,"");

				if (rst != null)
				{
					rst.MoveFirst(); 
					if (!rst.EOF)
						return rst;
				}
			}

			for (int i = 0; i < m_env.m_nLayerNum; i ++)
			{
				//if (m_env.m_layerInfos[i].bVisible && m_env.m_layerInfos[i].bCanSelected && m_env.m_layerInfos[i].layer.shapeType == MapObjects2.ShapeTypeConstants.moShapeTypeLine)     
				//	rst = m_env.m_layerInfos[i].layer.SearchByDistance(pt,dScale,"");

				if (rst != null)
				{
					rst.MoveFirst(); 
					if (!rst.EOF)
						return rst;
				}
			}

			for (int i = 0; i < m_env.m_nLayerNum; i ++)
			{
				if (m_env.m_layerInfos[i].bVisible && m_env.m_layerInfos[i].bCanSelected && m_env.m_layerInfos[i].layer.shapeType == MapObjects2.ShapeTypeConstants.moShapeTypePolygon )     
					rst = m_env.m_layerInfos[i].layer.SearchByDistance(pt,dScale,"");

				if (rst != null)
				{
					rst.MoveFirst(); 
					if (!rst.EOF)
						return rst;
				}
			}
*/
			return rst;
		}

	}
}