GraduatedSymbolTheme

2015-06-10 14:32:16 访问(1501) 赞(0) 踩(0)

///////////////////////////////////////////////////////////////////////////////
//
// (c) Pitney Bowes MapInfo Corporation, 2008. All rights reserved.
//
// The source code below is provided as sample code only. The end user of the
// Licensed Product that contains this code may use the code below for
// development purposes. This software is provided by Pitney Bowes MapInfo
// "as is" and any express or implied warranties, including, but not limited
// to, the implied warranties of merchantability and fitness for a particular
// purpose are disclaimed. In no event shall Pitney Bowes MapInfo be liable
// for any direct, indirect, incidental, special, exemplary, or consequential
// damages (including, but not limited to, procurement of substitute goods or
// services; loss of use, data or profits; or business interruption) however
// caused and whether in contract, strict liability, or tort (including
// negligence) arising in any way out of the use of this software, even if
// advised of the possibility of such damage.
//
///////////////////////////////////////////////////////////////////////////////
using System;
using System.IO;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using MapInfo.Engine;
using MapInfo.Mapping;
using MapInfo.Mapping.Thematics;

namespace GraduatedSymbolThemeSample
{
/// <summary>
/// Summary description for Form1.
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private MapInfo.Windows.Controls.MapControl mapControl1;
private System.Windows.Forms.Button button1;
private System.Windows.Forms.Button button2;
private System.Windows.Forms.Button button3;
private System.Windows.Forms.Button button4;
private System.Windows.Forms.Button button5;
private System.Windows.Forms.Label label1;
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;

public Form1()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();

//
// TODO: Add any constructor code after InitializeComponent call
//
}

/// <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()
{
this.mapControl1 = new MapInfo.Windows.Controls.MapControl();
this.button1 = new System.Windows.Forms.Button();
this.button2 = new System.Windows.Forms.Button();
this.button3 = new System.Windows.Forms.Button();
this.button4 = new System.Windows.Forms.Button();
this.button5 = new System.Windows.Forms.Button();
this.label1 = new System.Windows.Forms.Label();
this.SuspendLayout();
//
// mapControl1
//
this.mapControl1.Location = new System.Drawing.Point(8, 12);
this.mapControl1.Name = "mapControl1";
this.mapControl1.Size = new System.Drawing.Size(320, 233);
this.mapControl1.TabIndex = 0;
this.mapControl1.Text = "mapControl1";
//
// button1
//
this.button1.Location = new System.Drawing.Point(8, 272);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(320, 23);
this.button1.TabIndex = 1;
this.button1.Text = "Simple theme";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// button2
//
this.button2.Location = new System.Drawing.Point(8, 296);
this.button2.Name = "button2";
this.button2.Size = new System.Drawing.Size(320, 23);
this.button2.TabIndex = 2;
this.button2.Text = "Theme Graduated by Log value";
this.button2.Click += new System.EventHandler(this.button2_Click);
//
// button3
//
this.button3.Location = new System.Drawing.Point(8, 368);
this.button3.Name = "button3";
this.button3.Size = new System.Drawing.Size(320, 23);
this.button3.TabIndex = 3;
this.button3.Text = "Theme that shows negative values";
this.button3.Click += new System.EventHandler(this.button3_Click);
//
// button4
//
this.button4.Location = new System.Drawing.Point(8, 320);
this.button4.Name = "button4";
this.button4.Size = new System.Drawing.Size(320, 23);
this.button4.TabIndex = 4;
this.button4.Text = "Theme that sets DataValueAtSize property";
this.button4.Click += new System.EventHandler(this.button4_Click);
//
// button5
//
this.button5.Location = new System.Drawing.Point(8, 344);
this.button5.Name = "button5";
this.button5.Size = new System.Drawing.Size(320, 23);
this.button5.TabIndex = 5;
this.button5.Text = "Theme that uses non-default symbol";
this.button5.Click += new System.EventHandler(this.button5_Click);
//
// label1
//
this.label1.Font = new System.Drawing.Font("Microsoft Sans Serif", 9.75F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
this.label1.Location = new System.Drawing.Point(8, 248);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(312, 16);
this.label1.TabIndex = 6;
this.label1.Text = "Click buttons to display the described theme:";
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(336, 398);
this.Controls.Add(this.label1);
this.Controls.Add(this.button5);
this.Controls.Add(this.button4);
this.Controls.Add(this.button3);
this.Controls.Add(this.button2);
this.Controls.Add(this.button1);
this.Controls.Add(this.mapControl1);
this.Name = "Form1";
this.Text = "Form1";
this.Load += new System.EventHandler(this.Form1_Load);
this.ResumeLayout(false);

}
#endregion

/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
}

// Sets up data search path
private void SetupTablePath()
{
// Set table search path to value sampledatasearch registry key
// if not found, then just use the app's current directory
Microsoft.Win32.RegistryKey key = Microsoft.Win32.Registry.LocalMachine.CreateSubKey(@"SOFTWARE\MapInfo\MapXtreme\6.8.0");
string s = (string)key.GetValue("SampleDataSearchPath");
if (s != null && s.Length > 0)
{
if (s.EndsWith("\\")==false)
{
s += "\\";
}
}
else
{
s = Environment.CurrentDirectory;
}
key.Close();

Session.Current.TableSearchPath.Path = s;
}

// Trys to load mexico.tab. If not successful, then
// the button controls that create themes are disabled.
private void Setup()
{
// Load the layer
try
{
mapControl1.Map.Load(new MapTableLoader("mexico.tab"));
}
catch(Exception)
{
this.button1.Enabled = false;
this.button2.Enabled = false;
this.button3.Enabled = false;
this.button4.Enabled = false;
this.button5.Enabled = false;
}
}

// Creates a simple theme using the default values
private void SimpleTheme(Map map) {
// Get table from the feature layer
MapInfo.Mapping.FeatureLayer mexicoLayer = map.Layers["mexico"] as MapInfo.Mapping.FeatureLayer;
MapInfo.Data.Table mexicoTable = mexicoLayer.Table;
// Create the theme
GraduatedSymbolTheme theme = new GraduatedSymbolTheme(mexicoTable, "Pop_90");
// Create the theme layer
ObjectThemeLayer themeLayer = new ObjectThemeLayer("Population1990", "Population1990", theme);
// Add theme layer to the map
map.Layers.Add(themeLayer);
}

// Creates a theme whose symbol sizes are graduated logarithmically
private void GraduateByLogTheme(Map map) {
// Get table from the feature layer
MapInfo.Mapping.FeatureLayer mexicoLayer = map.Layers["mexico"] as MapInfo.Mapping.FeatureLayer;
MapInfo.Data.Table mexicoTable = mexicoLayer.Table;
// Create the theme
GraduatedSymbolTheme theme = new GraduatedSymbolTheme(mexicoTable, "Pop_90");
// Graduate the size logarithmically
theme.GraduateSizeBy = GraduateSizeBy.Log;
// Create the theme layer
ObjectThemeLayer themeLayer = new ObjectThemeLayer("Population1990", "Population1990", theme);
// Add theme layer to the map
map.Layers.Add(themeLayer);
}

// Creates a theme with a custom DataValueAtSize property
private void DataValueAtSizeTheme(Map map) {
// Get table from the feature layer
MapInfo.Mapping.FeatureLayer mexicoLayer = map.Layers["mexico"] as MapInfo.Mapping.FeatureLayer;
MapInfo.Data.Table mexicoTable = mexicoLayer.Table;
// Create the theme
GraduatedSymbolTheme theme = new GraduatedSymbolTheme(mexicoTable, "Pop_90");
// Decreasing DataValueAtSize value will increase the size of the symbols.
theme.DataValueAtSize /= 4;
// Create the theme layer
ObjectThemeLayer themeLayer = new ObjectThemeLayer("Population1990", "Population1990", theme);
// Add theme layer to the map
map.Layers.Add(themeLayer);
}

// Creates a theme with a non-default symbol
private void CustomPositiveSymbolTheme(Map map) {
// Get table from the feature layer
MapInfo.Mapping.FeatureLayer mexicoLayer = map.Layers["mexico"] as MapInfo.Mapping.FeatureLayer;
MapInfo.Data.Table mexicoTable = mexicoLayer.Table;
// Create the theme
GraduatedSymbolTheme theme = new GraduatedSymbolTheme(mexicoTable, "Pop_90");
// Replace the default symbol of the theme
theme.PositiveSymbol = new MapInfo.Styles.SimpleVectorPointStyle(35, Color.Blue, 36);
// Create the theme layer
ObjectThemeLayer themeLayer = new ObjectThemeLayer("Population1990", "Population1990", theme);
// Add theme layer to the map
map.Layers.Add(themeLayer);
}

// Creates a theme that shows symbols for negative values.
// Also uses the NumericNull property to hide the symbol of
// the greatest theme value.
private void NegativeValueTheme(Map map) {
// Get table from the feature layer
MapInfo.Mapping.FeatureLayer mexicoLayer = map.Layers["mexico"] as MapInfo.Mapping.FeatureLayer;
MapInfo.Data.Table mexicoTable = mexicoLayer.Table;
// Add a temporary column to the mexico table,
// calulating the difference between Pop_90 and Pop_80
MapInfo.Data.Columns tempColumns = new MapInfo.Data.Columns();
tempColumns.Add(new MapInfo.Data.Column("CarsMinusTrucks", "(Cars_91-Trucks_91)"));
mexicoTable.AddColumns(tempColumns);
// Create the theme
GraduatedSymbolTheme theme = new GraduatedSymbolTheme(mexicoTable, "CarsMinusTrucks");
// Show Negative symbols
theme.ShowNegativeSymbol = true;
// Setup symbols
theme.PositiveSymbol = new MapInfo.Styles.SimpleVectorPointStyle(35, Color.Blue, 18);
theme.NegativeSymbol = new MapInfo.Styles.SimpleVectorPointStyle(35, Color.Red, 36);
// Get the larget value in the theme column
MapInfo.Data.MIDataReader reader = mexicoTable.ExecuteReader("MAX(CarsMinusTrucks)");
reader.MoveNext();
double maxValue = reader.GetDouble(0);
reader.Dispose();
// Setup the numeric null value to exclude the largest value
theme.NumericNull = maxValue;
theme.HasNumericNull = true;
// These end up being small values, so use the DataValueAtSize
// property to increase the size of the symbols
theme.DataValueAtSize = 50000;
// Create the theme layer
ObjectThemeLayer themeLayer = new ObjectThemeLayer("CarOrTruck", "CarOrTruck", theme);
// Add theme layer to the map
map.Layers.Add(themeLayer);
}

// Removes all theme layers from the map.
private void ClearThemes(Map map) {
// Create a list of theme layers in the map
ArrayList themeLayers = new ArrayList();
foreach (IMapLayer layer in map.Layers) {
if (layer is ObjectThemeLayer) {
themeLayers.Add(layer);
}
}
// Remove each theme layer from the map
foreach (object targetLayer in themeLayers) {
map.Layers.Remove((IMapLayer) targetLayer);
}
}

// Enables or disables the button controls.
private void EnableButtons(bool enable) {
this.button1.Enabled = enable;
this.button2.Enabled = enable;
this.button3.Enabled = enable;
this.button4.Enabled = enable;
this.button5.Enabled = enable;
}

private void button1_Click(object sender, System.EventArgs e) {
ClearThemes(mapControl1.Map);
SimpleTheme(mapControl1.Map);
}

private void button2_Click(object sender, System.EventArgs e) {
ClearThemes(mapControl1.Map);
this.GraduateByLogTheme(mapControl1.Map);
}

private void button3_Click(object sender, System.EventArgs e) {
ClearThemes(mapControl1.Map);
this.NegativeValueTheme(mapControl1.Map);
}

private void button4_Click(object sender, System.EventArgs e) {
ClearThemes(mapControl1.Map);
this.DataValueAtSizeTheme(mapControl1.Map);
}

private void button5_Click(object sender, System.EventArgs e) {
ClearThemes(mapControl1.Map);
this.CustomPositiveSymbolTheme(mapControl1.Map);
}

private void Form1_Load(object sender, System.EventArgs e) {
SetupTablePath();
Setup();
}
}
}