[code]using System;
using System.Collections.Generic;
using System.Windows;
using System.Windows.Controls;
using Northwoods.GoXam;
using Northwoods.GoXam.Model;
namespace SilverlightApplication1 {
public partial class MultiDataModel : UserControl {
public MultiDataModel() {
InitializeComponent();
// support three categories of templates for nodes
var dtd = new DataTemplateDictionary();
dtd.Default = Diagram.FindResource<DataTemplate>(myDiagram, "PersonTemplate");
dtd.Add("Astronaut", Diagram.FindResource<DataTemplate>(myDiagram, "AstronautTemplate"));
dtd.Add("RaceCarDriver", Diagram.FindResource<DataTemplate>(myDiagram, "RaceCarDriverTemplate"));
myDiagram.NodeTemplateDictionary = dtd;
// create a trivial model holding one instance of each node data class
var model1 = new GraphModel<Person, String>();
model1.NodesSource = new List<Person>() {
new Person() { Key="1", Category="", Text="Joe Random", Mass=50 },
new Astronaut() { Key="2", Category="Astronaut", Text="Joe Wright", Mass=50, CurrentWeight=0.01 },
new RaceCarDriver() { Key="3", Category="RaceCarDriver", Text="Fast Joe", Mass=50, CurrentSpeed=203 },
};
this.Model1 = model1;
// start off showing this model
myDiagram.Model = this.Model1;
}
internal GraphModel<Person, String> Model1 { get; set; }
private void Button1_Click(object sender, RoutedEventArgs e) {
myDiagram.Model = this.Model1;
}
private void Button2_Click(object sender, RoutedEventArgs e) {
var model2 = new GraphModel<Person, String>();
model2.NodesSource = GeneratePeople();
myDiagram.Model = model2;
}
private IList<Person> GeneratePeople() {
var people = new List<Person>();
Random rand = new Random();
int num = rand.Next(10) + 3;
for (int i = 0; i < num; i++) {
Person p;
switch (rand.Next(3)) {
case 1: p = new Astronaut() { Category="Astronaut" }; break;
case 2: p = new RaceCarDriver() { Category="RaceCarDriver" }; break;
default: p = new Person() { Category="" }; break;
}
p.Key = i.ToString();
p.Text = "Person #" + i.ToString();
p.Mass = rand.Next(100);
people.Add(p);
}
return people;
}
}
public class Person : GraphModelNodeData {
public double Mass {
get { return _Mass; }
set {
if (_Mass != value) {
double old = _Mass;
_Mass = value;
RaisePropertyChanged(“Mass”, old, value);
}
}
}
private double _Mass;
}
public class Astronaut : Person {
public double CurrentWeight {
get { return _CurrentWeight; }
set {
if (_CurrentWeight != value) {
double old = _CurrentWeight;
_CurrentWeight = value;
RaisePropertyChanged(“CurrentWeight”, old, value);
}
}
}
private double _CurrentWeight;
}
public class RaceCarDriver : Person {
public double CurrentSpeed {
get { return _CurrentSpeed; }
set {
if (_CurrentSpeed != value) {
double old = _CurrentSpeed;
_CurrentSpeed = value;
RaisePropertyChanged(“CurrentSpeed”, old, value);
}
}
}
private double _CurrentSpeed;
}
}[/code]