/// <summary>
/// Initializes a new instance of the <see cref="LegendItemViewModel"/> class from a <see cref="LegendItemInfo"/>.
/// </summary>
/// <param name="legendItemInfo">The legend item info.</param>
/// <param name="geometryType">Type of the geometry.</param>
internal LegendItemViewModel(LegendItemInfo legendItemInfo, GeometryType geometryType)
: this()
{
Label = legendItemInfo.Label;
Symbol = legendItemInfo.Symbol;
GeometryType = geometryType;
}
/// <summary>
/// Initializes a new instance of the <see cref="LegendItemViewModel"/> class from a <see cref="LegendItemInfo"/>.
/// </summary>
/// <param name="legendItemInfo">The legend item info.</param>
/// <param name="geometryType">Type of the geometry.</param>
internal LegendItemViewModel(LegendItemInfo legendItemInfo, GeometryType geometryType)
: this()
{
Label = legendItemInfo.Label;
Symbol = legendItemInfo.Symbol;
GeometryType = geometryType;
}
public void Init(LegendItemInfo item, Drawing.Resources resources, IViewEvents events)
{
this.item = item;
this.resources = resources;
this.events = events;
previewView.NeedsDisplay = true;
}
/// <summary>
/// Queries for the legend infos of a layer.
/// </summary>
/// <remarks>
/// The returned result is encapsulated in a <see cref="LayerLegendInfo" /> object containing one legend item showing the heat map gradient.
/// </remarks>
/// <param name="callback">The method to call on completion.</param>
/// <param name="errorCallback">The method to call in the event of an error.</param>
public void QueryLegendInfos(Action <LayerLegendInfo> callback, Action <Exception> errorCallback)
{
// Create one legend item with a radial brush using the heat map gradient (reversed)
// Create the UI element
RadialGradientBrush brush = new RadialGradientBrush()
{
Center = new Point(0.5, 0.5),
RadiusX = 0.5,
RadiusY = 0.5,
GradientOrigin = new Point(0.5, 0.5),
GradientStops = new GradientStopCollection()
};
if (Gradient != null)
{
foreach (GradientStop stop in Gradient)
{
brush.GradientStops.Add(new GradientStop()
{
Color = stop.Color, Offset = 1 - stop.Offset
});
}
}
Rectangle rect = new Rectangle()
{
Height = 20, Width = 20, Fill = brush
};
// Create the imagesource
ImageSource imageSource;
#if SILVERLIGHT
imageSource = new WriteableBitmap(rect, null);
#else
RenderTargetBitmap renderTargetBitmap = new RenderTargetBitmap(20, 20, 96, 96, PixelFormats.Pbgra32);
renderTargetBitmap.Render(rect);
imageSource = renderTargetBitmap;
#endif
// Create a layerItemInfo array (so enumerable) with one item
LegendItemInfo legendItemInfo = new LegendItemInfo()
{
Label = ID,
ImageSource = imageSource
};
LegendItemInfo[] legendItemInfos = new LegendItemInfo[] { legendItemInfo };
// Create the returned layerLegendInfo
LayerLegendInfo layerLegendInfo = new LayerLegendInfo()
{
LegendItemInfos = legendItemInfos
};
if (callback != null)
{
callback(layerLegendInfo);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="LegendItemViewModel"/> class from a <see cref="LegendItemInfo"/>.
/// </summary>
/// <param name="legendItemInfo">The legend item info.</param>
internal LegendItemViewModel(LegendItemInfo legendItemInfo) : this()
{
Label = legendItemInfo.Label;
ImageSource = legendItemInfo.ImageSource;
}
/// <summary>
/// Initializes a new instance of the <see cref="LegendItemViewModel"/> class from a <see cref="LegendItemInfo"/>.
/// </summary>
/// <param name="legendItemInfo">The legend item info.</param>
internal LegendItemViewModel(LegendItemInfo legendItemInfo)
: this()
{
Label = legendItemInfo.Label;
ImageSource = legendItemInfo.ImageSource;
}
/// <summary>
/// Queries for the legend infos of a layer.
/// </summary>
/// <remarks>
/// The returned result is encapsulated in a <see cref="LayerLegendInfo" /> object containing one legend item showing the heat map gradient.
/// </remarks>
/// <param name="callback">The method to call on completion.</param>
/// <param name="errorCallback">The method to call in the event of an error.</param>
public void QueryLegendInfos(Action<LayerLegendInfo> callback, Action<Exception> errorCallback)
{
// Create one legend item with a radial brush using the heat map gradient (reversed)
// Create the UI element
RadialGradientBrush brush = new RadialGradientBrush()
{
Center = new Point(0.5, 0.5),
RadiusX = 0.5,
RadiusY = 0.5,
GradientOrigin = new Point(0.5, 0.5),
GradientStops = new GradientStopCollection()
};
if (Gradient != null)
{
foreach (GradientStop stop in Gradient)
brush.GradientStops.Add(new GradientStop() { Color = stop.Color, Offset = 1 - stop.Offset });
}
Rectangle rect = new Rectangle() { Height = 20, Width = 20, Fill = brush };
// Create the imagesource
ImageSource imageSource;
#if SILVERLIGHT
imageSource = new WriteableBitmap(rect, null);
#else
RenderTargetBitmap renderTargetBitmap = new RenderTargetBitmap(20, 20, 96, 96, PixelFormats.Pbgra32);
renderTargetBitmap.Render(rect);
imageSource = renderTargetBitmap;
#endif
// Create a layerItemInfo array (so enumerable) with one item
LegendItemInfo legendItemInfo = new LegendItemInfo() {
Label = ID,
ImageSource = imageSource
};
LegendItemInfo[] legendItemInfos = new LegendItemInfo[] { legendItemInfo };
// Create the returned layerLegendInfo
LayerLegendInfo layerLegendInfo = new LayerLegendInfo() { LegendItemInfos = legendItemInfos };
if (callback != null)
callback(layerLegendInfo);
}
/// <summary>
/// Initializes a new instance of the <see cref="LegendItemViewModel"/> class from a <see cref="LegendItemInfo"/>.
/// </summary>
/// <param name="legendItemInfo">The legend item info.</param>
internal LegendItemViewModel(LegendItemInfo legendItemInfo)
: this()
{
Label = legendItemInfo.Label;
Symbol = legendItemInfo.Symbol;
}
