ImageTileDataProvider.TileSource Property
Gets or sets a tile source for the image tile provider.
Namespace: DevExpress.Xpf.Map
Assembly: DevExpress.Xpf.Map.v20.1.dll
NuGet Packages: DevExpress.WindowsDesktop.Wpf.Map, DevExpress.Wpf.Map
Declaration
Property Value
Type | Description |
---|---|
ImageTileSource | An ImageTileSource descendant object. |
Example
This example shows how to use an ImageTileDataProvider instance to generate map tiles.
- Create an ImageTileDataProvider object and assign it to the ImageLayer.DataProvider property.
- Create a class that inherits the ImageTileSource class.
- Implement the interface’s ImageTileSource.GetImageSource method that returns a bitmap for each tile based on its indices and the map control’s zoom level.
- Assign an instance of the class you developed to the
ImageTileDataProvider.TileSource
property.
Note
A complete sample project is available at https://github.com/DevExpress-Examples/dxmap-how-to-use-in-memory-image-tile-provider
Markup
<Window
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:DXMapInMemoryTileProvider"
xmlns:dxm="http://schemas.devexpress.com/winfx/2008/xaml/map"
x:Class="DXMapInMemoryTileProvider.MainWindow"
mc:Ignorable="d"
Title="MainWindow" Height="450" Width="800">
<Grid>
<dxm:MapControl>
<dxm:ImageLayer x:Name="imageLayer"/>
</dxm:MapControl>
</Grid>
</Window>
Code-Behind
using DevExpress.Xpf.Map;
using System;
using System.Globalization;
using System.Windows;
using System.Windows.Media;
using System.Windows.Media.Imaging;
namespace DXMapInMemoryTileProvider {
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window {
public MainWindow() {
InitializeComponent();
ImageTileDataProvider tileDataProvider = new ImageTileDataProvider();
tileDataProvider.TileSource = new SimpleTileGenerator();
this.imageLayer.DataProvider = tileDataProvider;
}
}
public class SimpleTileGenerator : ImageTileSource {
Random rnd = new Random();
public override string Name => nameof(SimpleTileGenerator);
public override ImageSource GetImageSource(long x, long y, int level, Size size) {
DrawingVisual drawingVisual = new DrawingVisual();
using (DrawingContext drawingContext = drawingVisual.RenderOpen()) {
FormattedText text = new FormattedText($"{x}:{y}:{level}", new CultureInfo("en-us"),
FlowDirection.LeftToRight, new Typeface("Arial"), 14, Brushes.Black);
drawingContext.DrawRectangle(new SolidColorBrush(Color.FromArgb(128, (byte)rnd.Next(255),
(byte)rnd.Next(255), (byte)rnd.Next(255))), null,
new Rect(new Point(), size));
drawingContext.DrawText(text, new Point(5, 5));
drawingContext.Close();
}
RenderTargetBitmap bmp = new RenderTargetBitmap((int)size.Width, (int)size.Height, 96, 96, PixelFormats.Pbgra32);
bmp.Render(drawingVisual);
return bmp;
}
protected override MapDependencyObject CreateObject() {
return new SimpleTileGenerator();
}
}
}
Related GitHub Examples
The following code snippet (auto-collected from DevExpress Examples) contains a reference to the TileSource property.
Note
The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.