IndividualValueThemeDemo
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///////////////////////////////////////////////////////////////////////////////
//
// (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.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.IO;
using System.Reflection;
using MapInfo.Data;
using MapInfo.Mapping;
using MapInfo.Mapping.Thematics;
using MapInfo.Engine;
using MapInfo.Styles;
using MapInfo.Windows.Dialogs;
namespace IndividualValueThematic
{
/// <summary>
/// This sample app demonstrates how to add IndividualValueThemes to
/// a layer, how to examine the properties of an IndividualValueTheme,
/// and how to remove IndividualValueThemes programmatically.
/// </summary>
public class IndividualValueThematic : System.Windows.Forms.Form
{
// By default this demo adds themes to the World layer.
// TODO: If you want to add themes to a different layer,
// change the _layerName variable, and then change the two
// _expression variables so that they represent valid expressions
// for the layer you specified.
private string _layerName = "World";
private string _expression1 = "Continent";
private string _expression2 = "Country";
private MapInfo.Windows.Controls.MapControl mapControl1;
private System.Windows.Forms.Panel panel1;
private System.Windows.Forms.StatusBar statusBar1;
private MapInfo.Windows.Controls.MapToolBar mapToolBar1;
private MapInfo.Windows.Controls.MapToolBarButton mapToolBarButtonLayerControl;
private MapInfo.Windows.Controls.MapToolBarButton mapToolBarButtonSelect;
private System.Windows.Forms.ToolBarButton toolBarButtonSep1;
private MapInfo.Windows.Controls.MapToolBarButton mapToolBarButtonZoomIn;
private MapInfo.Windows.Controls.MapToolBarButton mapToolBarButtonZoomOut;
private MapInfo.Windows.Controls.MapToolBarButton mapToolBarButtonPan;
private System.Windows.Forms.ToolBarButton toolBarButtonSep2;
private System.Windows.Forms.ToolBarButton toolBarButtonAddContinentTheme;
private System.Windows.Forms.ToolBarButton toolBarButtonAddCountryTheme;
private System.Windows.Forms.ToolBarButton toolBarButtonThemeInfo;
private System.Windows.Forms.ToolBarButton toolBarButtonClear;
private System.ComponentModel.Container components = null;
public IndividualValueThematic()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
// Listen to some map events
mapControl1.Map.ViewChangedEvent += new ViewChangedEventHandler(Map_ViewChanged);
// If the map is blank -- which it is, unless you have modified
// it in design mode -- load a sample geoset containing the World table
if (mapControl1.Map == null || mapControl1.Map.Layers.Count == 0)
{
SetupMap();
}
}
// Initialize the map using the sample World geoset.
private void SetupMap()
{
// 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;
string geoSetName = "world.gst";
try
{
mapControl1.Map.Load(new MapGeosetLoader(s + geoSetName));
}
catch(Exception)
{
MessageBox.Show("Geoset " + geoSetName + " not found.");
}
}
/// <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.panel1 = new System.Windows.Forms.Panel();
this.statusBar1 = new System.Windows.Forms.StatusBar();
this.mapToolBar1 = new MapInfo.Windows.Controls.MapToolBar();
this.mapToolBarButtonLayerControl = new MapInfo.Windows.Controls.MapToolBarButton();
this.toolBarButtonSep1 = new System.Windows.Forms.ToolBarButton();
this.mapToolBarButtonSelect = new MapInfo.Windows.Controls.MapToolBarButton();
this.mapToolBarButtonZoomIn = new MapInfo.Windows.Controls.MapToolBarButton();
this.mapToolBarButtonZoomOut = new MapInfo.Windows.Controls.MapToolBarButton();
this.mapToolBarButtonPan = new MapInfo.Windows.Controls.MapToolBarButton();
this.toolBarButtonSep2 = new System.Windows.Forms.ToolBarButton();
this.toolBarButtonAddContinentTheme = new System.Windows.Forms.ToolBarButton();
this.toolBarButtonAddCountryTheme = new System.Windows.Forms.ToolBarButton();
this.toolBarButtonThemeInfo = new System.Windows.Forms.ToolBarButton();
this.toolBarButtonClear = new System.Windows.Forms.ToolBarButton();
this.panel1.SuspendLayout();
this.SuspendLayout();
//
// mapControl1
//
this.mapControl1.Dock = System.Windows.Forms.DockStyle.Fill;
this.mapControl1.Location = new System.Drawing.Point(0, 0);
this.mapControl1.Name = "mapControl1";
this.mapControl1.Size = new System.Drawing.Size(420, 252);
this.mapControl1.TabIndex = 0;
this.mapControl1.Text = "mapControl1";
this.mapControl1.Tools.MiddleButtonTool = null;
//
// panel1
//
this.panel1.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
| System.Windows.Forms.AnchorStyles.Left)
| System.Windows.Forms.AnchorStyles.Right)));
this.panel1.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
this.panel1.Controls.Add(this.mapControl1);
this.panel1.Location = new System.Drawing.Point(4, 32);
this.panel1.Name = "panel1";
this.panel1.Size = new System.Drawing.Size(424, 256);
this.panel1.TabIndex = 1;
//
// statusBar1
//
this.statusBar1.Location = new System.Drawing.Point(0, 287);
this.statusBar1.Name = "statusBar1";
this.statusBar1.Size = new System.Drawing.Size(432, 19);
this.statusBar1.TabIndex = 2;
//
// mapToolBar1
//
this.mapToolBar1.Buttons.AddRange(new System.Windows.Forms.ToolBarButton[] {
this.mapToolBarButtonLayerControl,
this.toolBarButtonSep1,
this.mapToolBarButtonSelect,
this.mapToolBarButtonZoomIn,
this.mapToolBarButtonZoomOut,
this.mapToolBarButtonPan,
this.toolBarButtonSep2,
this.toolBarButtonAddContinentTheme,
this.toolBarButtonAddCountryTheme,
this.toolBarButtonThemeInfo,
this.toolBarButtonClear});
this.mapToolBar1.Divider = false;
this.mapToolBar1.Dock = System.Windows.Forms.DockStyle.None;
this.mapToolBar1.DropDownArrows = true;
this.mapToolBar1.Location = new System.Drawing.Point(0, 0);
this.mapToolBar1.MapControl = this.mapControl1;
this.mapToolBar1.Name = "mapToolBar1";
this.mapToolBar1.ShowToolTips = true;
this.mapToolBar1.Size = new System.Drawing.Size(280, 26);
this.mapToolBar1.TabIndex = 3;
this.mapToolBar1.ButtonClick += new System.Windows.Forms.ToolBarButtonClickEventHandler(this.mapToolBar1_ButtonClick);
//
// mapToolBarButtonLayerControl
//
this.mapToolBarButtonLayerControl.ButtonType = MapInfo.Windows.Controls.MapToolButtonType.LayerControl;
this.mapToolBarButtonLayerControl.ToolTipText = "Layer Control";
//
// toolBarButtonSep1
//
this.toolBarButtonSep1.Style = System.Windows.Forms.ToolBarButtonStyle.Separator;
//
// mapToolBarButtonSelect
//
this.mapToolBarButtonSelect.ButtonType = MapInfo.Windows.Controls.MapToolButtonType.Select;
this.mapToolBarButtonSelect.ToolTipText = "Select";
//
// mapToolBarButtonZoomIn
//
this.mapToolBarButtonZoomIn.ButtonType = MapInfo.Windows.Controls.MapToolButtonType.ZoomIn;
this.mapToolBarButtonZoomIn.ToolTipText = "Zoom-in";
//
// mapToolBarButtonZoomOut
//
this.mapToolBarButtonZoomOut.ButtonType = MapInfo.Windows.Controls.MapToolButtonType.ZoomOut;
this.mapToolBarButtonZoomOut.ToolTipText = "Zoom-out";
//
// mapToolBarButtonPan
//
this.mapToolBarButtonPan.ButtonType = MapInfo.Windows.Controls.MapToolButtonType.Pan;
this.mapToolBarButtonPan.ToolTipText = "Pan";
//
// toolBarButtonSep2
//
this.toolBarButtonSep2.Style = System.Windows.Forms.ToolBarButtonStyle.Separator;
//
// toolBarButtonAddContinentTheme
//
this.toolBarButtonAddContinentTheme.ImageIndex = 34;
this.toolBarButtonAddContinentTheme.ToolTipText = "Add \'Continent\' Individual Value Theme";
//
// toolBarButtonAddCountryTheme
//
this.toolBarButtonAddCountryTheme.ImageIndex = 34;
this.toolBarButtonAddCountryTheme.ToolTipText = "Add \'Country\' Individual Value Theme";
//
// toolBarButtonThemeInfo
//
this.toolBarButtonThemeInfo.ImageIndex = 8;
this.toolBarButtonThemeInfo.ToolTipText = "Show Information about Theme";
//
// toolBarButtonClear
//
this.toolBarButtonClear.ImageIndex = 42;
this.toolBarButtonClear.ToolTipText = "Clear all IndividualValueThemes";
//
// IndividualValueThematic
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(432, 306);
this.Controls.Add(this.mapToolBar1);
this.Controls.Add(this.statusBar1);
this.Controls.Add(this.panel1);
this.MinimumSize = new System.Drawing.Size(250, 200);
this.Name = "IndividualValueThematic";
this.Text = "Individual Value Theme demo";
this.Load += new System.EventHandler(this.MapForm1_Load);
this.panel1.ResumeLayout(false);
this.ResumeLayout(false);
}
#endregion
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new IndividualValueThematic());
}
// Add an IndividualValueTheme to the specified layer.
private void DoAddTheme(Map myMap, string layerToTheme, string expression)
{
// First obtain a reference to the layer that will own the theme
FeatureLayer lyr = (FeatureLayer)myMap.Layers[layerToTheme];
if (lyr == null)
{
MessageBox.Show("Layer " + layerToTheme + " not found; theme cannot be added.");
return;
}
IndividualValueTheme ivTheme = null;
try
{
// Create the theme. Pass null for the theme's alias.
ivTheme = new IndividualValueTheme(lyr, expression, null);
}
catch (System.NullReferenceException)
{
// This exception can occur if you specify an expression
// that is not valid for this layer.
MessageBox.Show("Unable to create theme; check expression syntax. "
+ "Layer: " + layerToTheme + ", Expression: " + expression,
"Error");
return;
}
// Set the theme's ApplyStylePart property to control which display
// attributes are overridden by the theme. If you specify StylePart.All:
// ivTheme.ApplyStylePart = StylePart.All;
// the theme will control each country's fill pattern and color.
// If you specify StylePart.Color, the theme will control each country's
// color, but will not alter each region's fill pattern.
// If you have specified a fill pattern using a display style override,
// and you do not want the individual value theme to interfere with that
// fill pattern, set ApplyStylePart to StylePart.Color.
ivTheme.ApplyStylePart = StylePart.Color;
// Now add the theme to the layer's collection of style modifiers.
// Insert it at the top of the list of modifiers, so that it will
// definitely be visible. (If the layer has other modifiers,
// such as style overrides, and you append the theme to the
// bottom of the list, the style overrides might override the theme.)
lyr.Modifiers.Insert(0, ivTheme);
MessageBox.Show("Added new IndividualValueTheme to layer " + _layerName
+ " using expression: " + expression, "Theme Added");
}
// Examine the layer's IndividualValueTheme, if there is one,
// and display information about some of the theme's properties.
private void DoThemeInfo()
{
// First obtain a reference to the layer
FeatureLayer lyr = (FeatureLayer)mapControl1.Map.Layers[_layerName];
if (lyr == null)
{
MessageBox.Show(
"Layer " + _layerName + " not found; no theme information to display.");
return;
}
// Reference the layer's collection of themes and other modifiers
FeatureStyleModifiers modifiers = lyr.Modifiers;
// See if the collection contains any IndividualValueTheme objects
IndividualValueTheme ivTheme = null;
int counter = 0;
foreach (FeatureStyleModifier mod in modifiers)
{
if (mod is IndividualValueTheme)
{
// We did find an IndividualValueTheme in the collection
counter++;
if (ivTheme == null)
{
// Keep a reference to the top-most theme we find
ivTheme = mod as IndividualValueTheme;
}
}
}
if (counter > 1)
{
MessageBox.Show("Found " + counter + " IndividualValueThemes on layer "
+ _layerName + "; displaying information for topmost theme.");
}
if (ivTheme != null)
{
string str = "Individual Value Theme properties: ";
str += "Theme name: '" + ivTheme.Name + "'. ";
str += "Theme expression: '" + ivTheme.Expression + "'. ";
str += "Theme has " + ivTheme.Bins.Count + " bins. ";
if (ivTheme.Visible)
{
str += " Theme is visible at the current zoom level. ";
}
else
{
str += " Theme is not currently visible. ";
}
MessageBox.Show(str);
}
else
{
MessageBox.Show("No IndividualValueTheme objects found for layer " + _layerName);
}
}
// Remove all IndividualValueThemes from the World layer
private void DoClearThemes()
{
// First obtain a reference to the layer
FeatureLayer lyr = (FeatureLayer)mapControl1.Map.Layers[_layerName];
if (lyr == null)
{
MessageBox.Show(
"Layer " + _layerName + " not found; no themes to remove.");
return;
}
// Reference the layer's collection of themes and other modifiers
FeatureStyleModifiers modifiers = lyr.Modifiers;
// remove any IndividualValueTheme objects
ArrayList aliases = new ArrayList();
foreach (FeatureStyleModifier mod in modifiers)
{
IndividualValueTheme ivTheme = mod as IndividualValueTheme;
if (ivTheme != null)
{
// We found a modifier that is an IndividualValueTheme.
// Remember its name so we can remove it after this loop.
aliases.Add(ivTheme.Alias);
}
}
foreach (string s in aliases)
{
modifiers.Remove(s);
}
MessageBox.Show("Removed " + aliases.Count
+ " IndividualValueTheme(s) from layer: " + _layerName);
}
// Handler function called when the active map's view changes
private void Map_ViewChanged(object o, ViewChangedEventArgs e) {
// Get the map
MapInfo.Mapping.Map map = (MapInfo.Mapping.Map) o;
// Display the zoom level
Double dblZoom = System.Convert.ToDouble(String.Format("{0:E2}", mapControl1.Map.Zoom.Value));
statusBar1.Text = "Zoom: " + dblZoom.ToString() + " " + mapControl1.Map.Zoom.Unit.ToString();
}
private void MapForm1_Load(object sender, System.EventArgs e)
{
MessageBox.Show("Click the toolbar buttons to add, remove, or "
+ "display information about individual value themes.",
"About this demo...");
}
// This method handles the toolbar's button click event
// (only the custom PushButtons need extra code -- Layer Control
// and Tool clicks are automatically handled by the MapToolBar control).
private void mapToolBar1_ButtonClick(object sender, System.Windows.Forms.ToolBarButtonClickEventArgs e)
{
if (object.ReferenceEquals(e.Button, toolBarButtonAddContinentTheme))
{
DoAddTheme(mapControl1.Map, _layerName, _expression1);
}
if (object.ReferenceEquals(e.Button, toolBarButtonAddCountryTheme))
{
DoAddTheme(mapControl1.Map, _layerName, _expression2);
}
else if (object.ReferenceEquals(e.Button, toolBarButtonThemeInfo))
{
DoThemeInfo();
}
else if (object.ReferenceEquals(e.Button, toolBarButtonClear))
{
DoClearThemes();
}
}
}
}
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IndividualValueThemeDemo 
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