viewform.cs

实现SHP

///GeoCon, free tool to create gml & svg from gis files. 
///Copyright(C) 2005 Amri Rosyada
///Distributed under GNU-LGPL, see a copy of the license in root directory

using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;

using GeoCon.Data;
using GeoCon.Classification;
 
namespace GeoCon
{
	/// <summary>
	/// Form for viewing map.
	/// </summary>
	public class ViewForm : System.Windows.Forms.Form
	{
		/// <summary>
		/// mapdata collection to display
		/// </summary>
		private MapDataCollection srcs;
		/// <summary>
		/// current zoomvalue
		/// </summary>
		private float zoomvalue=1.0f;

		#region private components
		private System.Windows.Forms.Panel panel1;
		private System.Windows.Forms.MainMenu mainMenu1;
		private System.Windows.Forms.MenuItem menuItem1;
		private System.Windows.Forms.MenuItem menuItem3;
		private System.Windows.Forms.MenuItem menuItem4;
		private System.Windows.Forms.MenuItem menuItem5;

		private System.Windows.Forms.MenuItem menuZoomin;
		private System.Windows.Forms.MenuItem menuZoomout;
		private System.Windows.Forms.MenuItem menuZoomoriginal;
		#endregion

		/// <summary>
		/// Required designer variable.
		/// </summary>
		private System.ComponentModel.Container components = null;

		public ViewForm()
		{ 
			InitializeComponent();
			this.SetStyle(ControlStyles.AllPaintingInWmPaint,true);
			this.SetStyle(ControlStyles.UserPaint, true);
			this.SetStyle(ControlStyles.DoubleBuffer, true);
			this.Load+=new EventHandler(ViewForm_Load);
			this.Resize+=new EventHandler(ViewForm_Resize);
			//this.ResizeRedraw =true;
		}

		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if(components != null)
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}


		#region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
			System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(ViewForm));
			this.panel1 = new System.Windows.Forms.Panel();
			this.mainMenu1 = new System.Windows.Forms.MainMenu();
			this.menuItem1 = new System.Windows.Forms.MenuItem();
			this.menuItem3 = new System.Windows.Forms.MenuItem();
			this.menuZoomin = new System.Windows.Forms.MenuItem();
			this.menuZoomout = new System.Windows.Forms.MenuItem();
			this.menuZoomoriginal = new System.Windows.Forms.MenuItem();
			this.menuItem5 = new System.Windows.Forms.MenuItem();
			this.menuItem4 = new System.Windows.Forms.MenuItem();
			this.SuspendLayout();
			// 
			// panel1
			// 
			this.panel1.BackColor = System.Drawing.Color.White;
			this.panel1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
			this.panel1.Location = new System.Drawing.Point(0, 0);
			this.panel1.Name = "panel1";
			this.panel1.Size = new System.Drawing.Size(144, 104);
			this.panel1.TabIndex = 0;
			this.panel1.Resize += new System.EventHandler(this.panel1_Resize);
			this.panel1.Paint += new System.Windows.Forms.PaintEventHandler(this.panel1_Paint);
			// 
			// mainMenu1
			// 
			this.mainMenu1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																					  this.menuItem1});
			// 
			// menuItem1
			// 
			this.menuItem1.Index = 0;
			this.menuItem1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																					  this.menuItem3,
																					  this.menuZoomin,
																					  this.menuZoomout,
																					  this.menuZoomoriginal,
																					  this.menuItem5,
																					  this.menuItem4});
			this.menuItem1.Shortcut = System.Windows.Forms.Shortcut.CtrlC;
			this.menuItem1.Text = "Menu";
			// 
			// menuItem3
			// 
			this.menuItem3.Index = 0;
			this.menuItem3.Text = "Refresh";
			this.menuItem3.Click += new System.EventHandler(this.menuItem3_Click);
			// 
			// menuZoomin
			// 
			this.menuZoomin.Index = 1;
			this.menuZoomin.Text = "Zoom In";
			this.menuZoomin.Click += new System.EventHandler(this.menuZoomin_Click);
			// 
			// menuZoomout
			// 
			this.menuZoomout.Index = 2;
			this.menuZoomout.Text = "Zoom Out";
			this.menuZoomout.Click += new System.EventHandler(this.menuZoomout_Click);
			// 
			// menuZoomoriginal
			// 
			this.menuZoomoriginal.Index = 3;
			this.menuZoomoriginal.Text = "Zoom Original";
			this.menuZoomoriginal.Click += new System.EventHandler(this.menuZoomoriginal_Click);
			// 
			// menuItem5
			// 
			this.menuItem5.Index = 4;
			this.menuItem5.Text = "-";
			// 
			// menuItem4
			// 
			this.menuItem4.Index = 5;
			this.menuItem4.Text = "Close";
			this.menuItem4.Click += new System.EventHandler(this.menuItem4_Click);
			// 
			// ViewForm
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.AutoScroll = true;
			this.ClientSize = new System.Drawing.Size(304, 217);
			this.Controls.Add(this.panel1);
			this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
			this.Menu = this.mainMenu1;
			this.MinimumSize = new System.Drawing.Size(50, 50);
			this.Name = "ViewForm";
			this.Text = "View";
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// close the form
		/// </summary>
		/// <param name="sender"></param>
		/// <param name="e"></param>
		private void menuItem4_Click(object sender, System.EventArgs e)
		{
			this.Close();
		}

		/// <summary>
		/// Refresh this view for specified mapdata collection
		/// </summary>
		/// <param name="maps">mapdata collection to display</param>
		public void DrawGraphics(MapDataCollection maps)
		{
			srcs=maps;
			panel1.Update();
		}

		/// <summary>
		/// Refresh view
		/// </summary>
		/// <param name="sender"></param>
		/// <param name="e"></param>
		private void menuItem3_Click(object sender, System.EventArgs e)
		{
			panel1.Invalidate();
			//panel1.Update();
		}

		/// <summary>
		/// Draws shape of current mapdata collection
		/// </summary>
		/// <param name="sender"></param>
		/// <param name="e"></param>
		private void panel1_Paint(object sender, PaintEventArgs e)
		{
			MapDataCollection maps=srcs;
			if(maps==null) return;
			int activelayers=0;
			for(int i=0;i<maps.Count;i++) activelayers+=maps[i].Fields.getActiveCount(false); 
			if(activelayers<1) return; //no active layers

			gml.BoxType box=maps.GetBoundingBox();
			float l = (float)box.Left; 
			float b = (float)box.Bottom; 
			float r = (float)box.Right; 
			float t = (float)box.Top; 

			float scl = zoomvalue*Math.Min(panel1.Bounds.Width/(r-l),panel1.Bounds.Height/(t-b));
			Graphics g = e.Graphics;

			g.Transform = new System.Drawing.Drawing2D.Matrix(1,0,0,-1,0,scl*(b+t));
			g.TranslateTransform(-l*scl,-b*scl,System.Drawing.Drawing2D.MatrixOrder.Append);
			g.ScaleTransform(scl,scl,System.Drawing.Drawing2D.MatrixOrder.Prepend);
			float maxdim = Math.Max(r-l,t-b);
			double diagonal = (Math.Sqrt((r-l)*(r-l)+(t-b)*(t-b)));

			Pen p = new Pen(Color.Red,maxdim/200);
			Brush br = Brushes.DarkBlue;

			//for(int i=0;i<maps.Count;i++)
			for(int i=maps.Count-1; i>=0;i--)
			{
				if(!maps[i].isActive) continue;

				GeometryField fgeo=maps[i].Fields.GetGeometryField();
				for(int k=0;k<maps[i].Bins.Count;k++)
				{
					Bin bin = maps[i].Bins[k];
					p = bin.Symbol.Pen; 
					br= bin.Symbol.Brush; 

					//point-radius scaling
					double pr = 0.01*bin.Symbol.PointRadiusMap*diagonal;

					//line-width scaling
					float oldwidth=p.Width;
					p.Width = (float)(0.01*bin.Symbol.LineWidthMap*diagonal); 

					foreach (int ci in bin.ContentsIndex)
					{
						if(fgeo[ci]==null || fgeo[ci]==fgeo.NullSymbol) continue;
						gml.GeometryPropertyType gpt = (gml.GeometryPropertyType)(fgeo[ci]);
						if(gpt.Item==null) continue;
						gpt.Item.PointRadius=pr;
						gpt.Item.DrawGraphics(ref g, ref p, ref br);
						gpt=null;
					}
					p.Width = oldwidth;//width re-scaling
				}
			}
		}

		private void panel1_Resize(object sender, EventArgs e)
		{
			panel1.Invalidate();
		}
		private void menuCopy_Click(object sender, System.EventArgs e)
		{		
			//TODO : Add code to capture and paste graphics to clipboard
			//but why would i want do that? export to svg will do just fine
		}
		private void menuSave_Click(object sender, System.EventArgs e)
		{
		}

		private void menuZoomoriginal_Click(object sender, System.EventArgs e)
		{
			panel1.Size=this.ClientSize;
			panel1.Invalidate();
		}
		private void menuZoomout_Click(object sender, System.EventArgs e)
		{
			panel1.Size=new Size(panel1.Size.Width*2/3,panel1.Size.Height*2/3);
			panel1.Invalidate();
		}
		private void menuZoomin_Click(object sender, System.EventArgs e)
		{
			panel1.Size=new Size(panel1.Size.Width*3/2,panel1.Size.Height*3/2);
			panel1.Invalidate();
		}

		private void ViewForm_Load(object sender, EventArgs e)
		{
			System.Drawing.Point loc = new Point();
			loc.X = this.Owner.DesktopLocation.X;
			loc.Y = this.Owner.DesktopLocation.Y+this.Owner.DesktopBounds.Height/2;
			this.DesktopLocation=loc;
			this.panel1.Size=this.ClientSize;
		}

		private void ViewForm_Resize(object sender, EventArgs e)
		{
			if(this.panel1.Size.Width>this.ClientSize.Width || this.panel1.Size.Height>this.ClientSize.Height) return;
			this.panel1.Size=this.ClientSize;
		}
	}
}