Question

I am trying to create a popup dialog which allows users to select coordinates within Australia, however I am having trouble finding specific documentation for the WPF control, even though it is quite similar to the Silverlight control.

Basically what I want to do is center the map on Australia and then zoom to a level of 3.8 and after doing so prevent the user from scrolling the map outside of a range of Australian coordinates, zooming out further then 3.8 or re-centering the map on another location outside of the australian range.

Here is my code so far:

    <Window x:Class="GetP51.Views.Dialogs.SelectCoordinatesDialog"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:m="clr-namespace:Microsoft.Maps.MapControl.WPF;assembly=Microsoft.Maps.MapControl.WPF"
        Title="GetP51 - Select Coordinates" MinHeight="525" Height="525" MaxHeight="525" MinWidth="500" Width="500" MaxWidth="500" Icon="../../GetP51.ico" WindowStartupLocation="CenterOwner" WindowStyle="ToolWindow">

    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="25"></RowDefinition>
            <RowDefinition></RowDefinition>
        </Grid.RowDefinitions>

        <TextBox x:Name="AddressSearch" Grid.Row="0"></TextBox>

        <m:Map x:Name="AustralianMap" Grid.Row="1" CredentialsProvider="key" Mode="Aerial"></m:Map>
    </Grid>
</Window>

And the code behind:

public partial class SelectCoordinatesDialog : Window
    {
        public SelectCoordinatesDialog()
        {
            InitializeComponent();
            AustralianMap.Center = new Location(-25.274398, 133.775136);
            AustralianMap.ZoomLevel = 3.8;
        }
    }

Can someone please tell me how to accomplish what I am looking to do?

Thanks,
Alex.

Answer 1

You could simply disable the map control and overlay it with a transparent control (e.g. a Canvas) that gets mouse input (e.g. MouseLeftButtonUp):

<Grid>
    <Grid.RowDefinitions>
        <RowDefinition Height="25"/>
        <RowDefinition/>
    </Grid.RowDefinitions>
    <TextBox x:Name="AddressSearch" Grid.Row="0" />    
    <m:Map Name="AustralianMap" Grid.Row="1"
           ZoomLevel="3.8" Center="-25.274398,133.775136"
           IsEnabled="False" />
    <Canvas Grid.Row="1" Background="Transparent"
            MouseLeftButtonUp="Canvas_MouseLeftButtonUp" />
</Grid>

In the input event handler you could get a Location like this:

private void Canvas_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
    Location loc = AustralianMap.ViewportPointToLocation(e.GetPosition(AustralianMap));

    System.Diagnostics.Trace.TraceInformation("Hit location {0}", loc);
}

And here is the Bing Maps WPF Control API Reference.