Hello Michael,
We are planning to add two new modes for the ColorMeasureScale in Q2 2011 release.
The modes will be the following:
- Ranges
Color Scale mode where you can specify map ranges manually, but range color is set automatically
- RangesPredefinedColors
Color Scale mode where you can specify map ranges manually (including range color)
This feature allows you to create custom ranges with their own MinValue and MinValue properties.
Currently the ColorMeasureScale allows you to do it after the processing of shapes only. For example you can use the ReadCompleted event for reassigning min / max properties of ranges.
Also if you need to use other criterion which is not contained in dbf file but can be calculated, then you can calculate it using the PreviewReadCompleted event. You can use the ExtendedPropertySet property of the MapShapeReader to specify necessary properties of ExtendedData for shapes you will use (including calculated fields).
The sample code is below.
<UserControl x:Class="WorldPopulation.MainPage"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="400">
<Grid x:Name="LayoutRoot" Background="White">
<telerik:RadMap x:Name="radMap"
Width="600"
Height="480"
UseDefaultLayout="False">
<telerik:RadMap.Provider>
<telerik:EmptyProvider />
</telerik:RadMap.Provider>
<telerik:InformationLayer x:Name="informationLayer">
<telerik:InformationLayer.Reader>
<telerik:MapShapeReader ExtendedPropertySet="POP_CNTRY,double Percentage,double"
PreviewReadCompleted="MapShapeReader_PreviewReadCompleted"
ReadCompleted="MapShapeReader_ReadCompleted"
DataSource="world.dbf" Source="world.shp"/>
</telerik:InformationLayer.Reader>
<telerik:InformationLayer.Colorizer>
<telerik:ColorMeasureScale ExtendedPropertyName="Percentage"
Mode="Count"
TickMarkCount="7">
<telerik:ColorMeasureScale.ShapeFillCollection>
<telerik:MapShapeFill Fill="#FFF0D9"
Stroke="#B1946D"
StrokeThickness="1" />
<telerik:MapShapeFill Fill="#FFE4BA"
Stroke="#B1946D"
StrokeThickness="1" />
<telerik:MapShapeFill Fill="#FFDBA3"
Stroke="#B1946D"
StrokeThickness="1" />
<telerik:MapShapeFill Fill="#FFD28D"
Stroke="#B1946D"
StrokeThickness="1" />
<telerik:MapShapeFill Fill="#FFBF5C"
Stroke="#B1946D"
StrokeThickness="1" />
<telerik:MapShapeFill Fill="#FFAF33"
Stroke="#B1946D"
StrokeThickness="1" />
<telerik:MapShapeFill Fill="#E2942D"
Stroke="#B1946D"
StrokeThickness="1" />
</telerik:ColorMeasureScale.ShapeFillCollection>
<telerik:ColorMeasureScale.HighlightFillCollection>
<telerik:MapShapeFill Fill="Orange"
Stroke="#B1946D"
StrokeThickness="1" />
</telerik:ColorMeasureScale.HighlightFillCollection>
</telerik:ColorMeasureScale>
</telerik:InformationLayer.Colorizer>
</telerik:InformationLayer>
</telerik:RadMap>
<telerik:MapLegend x:Name="mapLegend"
Layer="{Binding ElementName=informationLayer}"
Header="Population (in percent):"
VerticalAlignment="Bottom"
HorizontalAlignment="Right"
Format="{}{0:F2}"
MarkerSize="40,20"
MarkerSpacing="0"
LabelLayout="Between"
LabelLocation="BottomRight"
Margin="0,0,10,10">
</telerik:MapLegend>
</Grid>
</UserControl>
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Windows;
using System.Windows.Controls;
using Telerik.Windows.Controls.Map;
namespace WorldPopulation
{
public partial class MainPage : UserControl
{
public MainPage()
{
InitializeComponent();
}
private void MapShapeReader_PreviewReadCompleted(object sender, PreviewReadShapesCompletedEventArgs eventArgs)
{
double commonPopulation = 0;
foreach (MapShape shape in eventArgs.Items)
{
double population = (double)shape.ExtendedData.GetValue("POP_CNTRY");
commonPopulation += population;
}
foreach (MapShape shape in eventArgs.Items)
{
double population = (double)shape.ExtendedData.GetValue("POP_CNTRY");
population = 100d * population / commonPopulation;
shape.ExtendedData.SetValue("Percentage", population);
}
}
private void MapShapeReader_ReadCompleted(object sender, ReadShapesCompletedEventArgs eventArgs)
{
var colorizer = this.informationLayer.Colorizer as ColorMeasureScale;
var range = colorizer.RangeCollection[0];
range.MinValue = 0;
range.MaxValue = 0.5;
range = colorizer.RangeCollection[1];
range.MinValue = 0.5;
range.MaxValue = 1;
range = colorizer.RangeCollection[2];
range.MinValue = 1;
range.MaxValue = 2;
range = colorizer.RangeCollection[3];
range.MinValue = 2;
range.MaxValue = 5;
range = colorizer.RangeCollection[4];
range.MinValue = 5;
range.MaxValue = 10;
range = colorizer.RangeCollection[5];
range.MinValue = 10;
range.MaxValue = 20;
range = colorizer.RangeCollection[6];
range.MinValue = 20;
}
}
}
Greetings,
Andrey Murzov
the Telerik team
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