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A reference to DeltaShell.Plugins.NetworkEditor needs to be added in order to successfully build the code below (right click the References folder of the project in the Solution Explorer | Add Reference... | Browse... | Select D:\VolumeModel\packages\DeltaShell.1.0.0\delta-shell\plugins\DeltaShell.Plugins.NetworkEditor\DeltaShell.Plugins.NetworkEditor.dll).

using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Windows.Forms;
using DelftTools.Shell.Gui;
using DeltaShell.Plugins.VolumeModel.Importers;
using DeltaShell.Plugins.NetworkEditor.Import;
using SharpMap.Api;
using SharpMap.Data.Providers;

namespace DeltaShell.Plugins.VolumeModel.Commands
{
    internal class AddInputDataToVolumeModelCommand : IGuiCommand
    {
        /// <summary>
        /// The name of the gui command
        /// </summary>
        public string Name
        {
            get { return "Add input data"; }
        }

        /// <summary>
        /// Ensures the gui command is enabled for volume models only
        /// </summary>
        public bool Enabled
        {
            get { return Gui != null && Gui.Selection is Models.VolumeModel; }
        }

        /// <summary>
        /// The image of the gui command
        /// </summary>
        public Image Image { get; set; }

        /// <summary>
        /// Whether or not the gui command is checked
        /// </summary>
        /// <remarks>Not relevant in this tutorial</remarks>
        public bool Checked { get; set; }

        /// <summary>
        /// A reference to the Delta Shell gui (automatically set by Delta Shell logic)
        /// </summary>
        public IGui Gui { get; set; }

        /// <summary>
        /// The action that should be performed while executing the gui command
        /// </summary>
        public void Execute(params object[] arguments)
        {
            // Obtain the selected volume model
            var volumeModel = (Models.VolumeModel) Gui.SelectedModel;

            // Try to obtain a precipitation file via a file dialog
            var fileDialog = new OpenFileDialog
                {
                    Title = "Choose precipitation time series",
                    Filter = "WaterML2 files|*.XML",
                    Multiselect = false
                };

            if (fileDialog.ShowDialog() != DialogResult.OK)
            {
                return;
            }

            // Create a WaterML2 time series importer
            var waterML2TimeSeriesImporter = new WaterML2TimeSeriesImporter();

            // Import the data from the precipitation file
            waterML2TimeSeriesImporter.ImportItem(fileDialog.FileName, volumeModel.Precipitation);

            // Try to obtain a shape file via a file dialog
            fileDialog = new OpenFileDialog
                {
                    Title = "Choose basin shape file",
                    Filter = "Shape files|*.shp",
                    Multiselect = false
                };

            if (fileDialog.ShowDialog() != DialogResult.OK)
            {
                return;
            }

            // Create a catchment importer
            var catchmentsImporter = new CatchmentFromGisImporter
                {
                    FileBasedFeatureProviders = new List<IFileBasedFeatureProvider>
                    {
                        new ShapeFile()
                    }
                };

            // Configure the catchment importer
            var catchmentImporterSettings = catchmentsImporter.FeatureFromGisImporterSettings;
            catchmentImporterSettings.Path = fileDialog.FileName;
            catchmentImporterSettings.PropertiesMapping.First(property => property.PropertyName == "Name").MappingColumn.ColumnName = "GM_NAAM";

            // Import the data from the shape file
            catchmentsImporter.ImportItem(null, volumeModel.Basin);
        }

        /// <summary>
        /// The action that should be performed in order to undo execute actions of the gui command
        /// </summary>
        /// <remarks>Not relevant in this tutorial</remarks>
        public void Unexecute()
        {

        }
    }
}

The command is derived from the IGuiCommand interface in order to obtain a reference to the Delta Shell gui (which is automatically set by the Delta Shell framework).

The comments in the code explain the different parts of the gui command implementation.

<UserControl x:Class="DeltaShell.Plugins.VolumeModel.Ribbon.VolumeModelRibbon"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:fluent="clr-namespace:Fluent;assembly=Fluent"
    mc:Ignorable="d" Height="145" Width="632">
    <!--Create a ribbon control-->
    <fluent:Ribbon Name="VolumeModelRibbonControl" x:FieldModifier="private">
        <!--Create a ribbon tab-->
        <fluent:RibbonTabItem Header="Volume model" fluent:KeyTip.Keys="E">
            <!--Create a ribbon group box-->
            <fluent:RibbonGroupBox Header="Input">
                <!--Create a ribbon button-->
                <fluent:Button x:Name="ButtonAddInputDataToVolumeModel"
                               Header="Add input data"
                               ToolTip="Add input data to the selected volume model"
                               Click="ButtonAddInputDataToVolumeModel_OnClick"
                               Size="Middle"
                               SizeDefinition="Middle,Small,Small"/>
            </fluent:RibbonGroupBox>
        </fluent:RibbonTabItem>
    </fluent:Ribbon>
</UserControl>

A reference to System.Xaml needs to be added in order to successfully build the code below (right click the References folder of the project in the Solution Explorer | Add Reference... | Assemblies | Framework | Select System.Xaml).

using System.Collections.Generic;
using System.Windows;
using DelftTools.Controls;
using DelftTools.Shell.Gui;
using DelftTools.Shell.Gui.Forms;
using DeltaShell.Plugins.VolumeModel.Commands;

namespace DeltaShell.Plugins.VolumeModel.Ribbon
{
    /// <summary>
    /// Interaction logic for VolumeModelRibbon.xaml
    /// </summary>
    public partial class VolumeModelRibbon : IRibbonCommandHandler
    {
        private readonly IGuiCommand addInputDataToVolumeModelCommand = new AddInputDataToVolumeModelCommand(); // Instance of the implemented gui command

        /// <summary>
        /// Creates the Ribbon control
        /// </summary>
        public VolumeModelRibbon()
        {
            // Initialize the control (standard user control logic)
            InitializeComponent();
        }

        /// <summary>
        /// Returns the volume model Ribbon control
        /// </summary>
        public object GetRibbonControl()
        {
            return VolumeModelRibbonControl;
        }

        /// <summary>
        /// Enabling/disabling actions to be performed while validating the Ribbon items (triggered by Delta Shell logic)
        /// </summary>
        public void ValidateItems()
        {
            ButtonAddInputDataToVolumeModel.IsEnabled = addInputDataToVolumeModelCommand.Enabled;
        }

        /// <summary>
        /// Whether or not the contextual tab should be visible
        /// </summary>
        public bool IsConextualTabVisible(string tabGroupName, string tabName)
        {
            return false;
        }

        /// <summary>
        /// The (gui) commands of the Ribbon control
        /// </summary>
        public IEnumerable<ICommand> Commands
        {
            get { yield return addInputDataToVolumeModelCommand; }
        }

        /// <summary>
        /// Actions to be performed after clicking the AddInputDataToVolumeModel button
        /// </summary>
        private void ButtonAddInputDataToVolumeModel_OnClick(object sender, RoutedEventArgs e)
        {
            addInputDataToVolumeModelCommand.Execute();
        }
    }
}

The Ribbon control is derived from the IRibbonCommandHandler interface so that it can be registered in the gui plugin.

The comments in the code should explain the different parts of the Ribbon control implementation.

using DelftTools.Shell.Gui.Forms;
using DeltaShell.Plugins.VolumeModel.Ribbon;

        public override IRibbonCommandHandler RibbonCommandHandler
        {
            get { return new VolumeModelRibbon(); }
        }

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