// Copyright 2014-, SharpMapTeam

//

// This file is part of SharpMap.

// SharpMap is free software; you can redistribute it and/or modify

// it under the terms of the GNU Lesser General Public License as published by

// the Free Software Foundation; either version 2 of the License, or

// (at your option) any later version.

//

// SharpMap is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

// GNU Lesser General Public License for more details.

// You should have received a copy of the GNU Lesser General Public License

// along with SharpMap; if not, write to the Free Software

// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

using System.ComponentModel;

using System.Drawing.Drawing2D;

using KeyEventArgs = System.Windows.Input.KeyEventArgs;

using MouseEventArgs = System.Windows.Forms.MouseEventArgs;

namespace SharpMap.UI.WPF

{

using System.Collections.Generic;

using System.Collections.ObjectModel;

using System.Collections.Specialized;

using System.Drawing;

using System.Linq;

using System.Windows;

using System.Windows.Forms.Integration;

using System.Windows.Input;

using GeoAPI.Geometries;

using Data.Providers;

using Forms;

using Layers;

using Rendering.Decoration;

using Rendering.Decoration.ScaleBar;

using KeyEventArgs = KeyEventArgs;

using MouseEventArgs = MouseEventArgs;

/// <summary>

/// Extends WindowsFormsHost and encapsulates SharpMap specific code.

/// </summary>

public class SharpMapHost : WindowsFormsHost, INotifyPropertyChanged

{

// Dependency Property to store MapLayers.

public static readonly DependencyProperty MapLayersProperty =

DependencyProperty.Register("MapLayers", typeof (ObservableCollection<ILayer>), typeof (SharpMapHost), new PropertyMetadata(SetMapLayersCallback));

// Dependency Property store store BackgroundLayer.

public static readonly DependencyProperty BackgroundLayerProperty =

DependencyProperty.Register("BackgroundLayer", typeof (Layer), typeof (SharpMapHost), new PropertyMetadata(SetBackgroundLayerCallback));

// Dependency Property to store ActiveTool.

public static readonly DependencyProperty ActiveToolProperty =

DependencyProperty.Register("ActiveTool", typeof (MapBox.Tools), typeof (SharpMapHost), new PropertyMetadata(SetActiveToolCallback));

// Dependency Property to store MaxExtent.

public static readonly DependencyProperty MaxExtentProperty =

DependencyProperty.Register("MaxExtent", typeof (Envelope), typeof (SharpMapHost), new PropertyMetadata(SetMaxExtentCallback));

// Dependency Property to store MapExtent.

public static readonly DependencyProperty MapExtentProperty =

DependencyProperty.Register("MapExtent", typeof (Envelope), typeof (SharpMapHost), new PropertyMetadata(MapExtentCallback));

// Dependency Property to store Rotation kept in MapTransform

public static readonly DependencyProperty MapRotationProperty =

DependencyProperty.Register("MapRotation", typeof(float), typeof(SharpMapHost), new PropertyMetadata(MapRotationCallback));

// Dependency Property used when a new geometry is defined.

public static readonly DependencyProperty DefinedGeometryProperty =

DependencyProperty.Register("DefinedGeometry", typeof (IGeometry), typeof (SharpMapHost), new PropertyMetadata(GeometryDefinedCallback));

// Dependency Property used when right click in a MapFeature.

public static readonly DependencyProperty FeatureRightClickedCommandProperty =

DependencyProperty.Register("FeatureRightClickedCommand", typeof (ICommand), typeof (SharpMapHost));

private readonly MapBox _mapBox;

private VectorLayer _editLayer;

private GeometryProvider _editLayerGeoProvider;

private Coordinate _currentMouseCoordinate;

/// <summary>

/// Initializes a new instance of the <see cref="SharpMapHost"/> class.

/// </summary>

public SharpMapHost()

{

_mapBox = new MapBox{

BackColor = Color.White,

Map = new Map{

SRID = 900913

}

};

Child = _mapBox;

MapLayers = new ObservableCollection<ILayer>();

var scaleBar = new ScaleBar{

Anchor = MapDecorationAnchor.LeftBottom

};

_mapBox.Map.Decorations.Add(scaleBar);

_mapBox.PanOnClick = false;

KeyDown += OnKeyDown;

_mapBox.MouseMove += MapBoxOnMouseMove;

}

public ObservableCollection<ILayer> MapLayers

{

get

{

return (ObservableCollection<ILayer>) GetValue(MapLayersProperty);

}

set

{

SetValue(MapLayersProperty, value);

}

}

public Layer BackgroundLayer

{

get

{

return (Layer) GetValue(BackgroundLayerProperty);

}

set

{

SetValue(BackgroundLayerProperty, value);

}

}

public MapBox.Tools ActiveTool

{

get

{

return (MapBox.Tools) GetValue(ActiveToolProperty);

}

set

{

SetValue(ActiveToolProperty, value);

}

}

public string CurrentMouseCoordinateString

{

get

{

return _currentMouseCoordinate != null ? string.Format("{0:0}, {1:0}", _currentMouseCoordinate.X, _currentMouseCoordinate.Y) : "";

}

}

public Coordinate CurrentMouseCoordinate

{

get

{

return _currentMouseCoordinate;

}

}

public Envelope MaxExtent

{

get

{

return (Envelope) GetValue(MaxExtentProperty);

}

set

{

SetValue(MaxExtentProperty, value);

}

}

public Envelope MapExtent

{

get

{

return _mapBox.Map.Envelope;

}

set

{

SetValue(MapExtentProperty, value);

}

}

public float MapRotation

{

get

{

return _mapBox.Map.MapTransformRotation;

}

set

{

SetValue(MapRotationProperty, value);

}

}

public IGeometry DefinedGeometry

{

get

{

return (IGeometry) GetValue(DefinedGeometryProperty);

}

set

{

SetValue(DefinedGeometryProperty, value);

}

}

/// <summary>

/// The command that is invoked when a feature is right clicked

/// </summary>

public ICommand FeatureRightClickedCommand

{

get

{

return GetValue(FeatureRightClickedCommandProperty) as ICommand;

}

set

{

SetValue(FeatureRightClickedCommandProperty, value);

}

}

/// <summary>

/// Gets called when changes on MapLayers

/// </summary>

/// <param name="sender">The sender object</param>

/// <param name="args">The event arguments</param>

private static void SetMapLayersCallback(object sender, DependencyPropertyChangedEventArgs args)

{

var host = sender as SharpMapHost;

if (host == null)

{

return;

}

var oldLayers = args.OldValue as ObservableCollection<ILayer>;

if (oldLayers != null)

{

oldLayers.CollectionChanged -= host.OnMapLayerChanged;

}

var newLayers = args.NewValue as ObservableCollection<ILayer>;

if (newLayers != null)

{

newLayers.CollectionChanged += host.OnMapLayerChanged;

}

}

/// <summary>

/// Gets called when changes on BackgroundLayer

/// </summary>

/// <param name="sender">The sender object</param>

/// <param name="args">The event arguments</param>

private static void SetBackgroundLayerCallback(object sender, DependencyPropertyChangedEventArgs args)

{

var host = sender as SharpMapHost;

if (host == null)

{

return;

}

var mapBox = host._mapBox;

var layer = args.NewValue as Layer;

if (layer != null)

{

mapBox.Map.BackgroundLayer.Add(layer);

}

mapBox.Refresh();

}

/// <summary>

/// Gets called when changes on ActiveTool

/// </summary>

/// <param name="sender">The sender object</param>

/// <param name="args">The event arguments</param>

private static void SetActiveToolCallback(object sender, DependencyPropertyChangedEventArgs args)

{

var host = sender as SharpMapHost;

if (host == null)

{

return;

}

var mapBox = host._mapBox;

var newTool = (MapBox.Tools) args.NewValue;

mapBox.ActiveTool = newTool;

}

/// <summary>

/// Gets called when changes on MaxExtent

/// </summary>

/// <param name="sender">The sender object</param>

/// <param name="args">The event arguments</param>

private static void SetMaxExtentCallback(object sender, DependencyPropertyChangedEventArgs args)

{

var host = sender as SharpMapHost;

if (host == null)

{

return;

}

var mapBox = host._mapBox;

var extent = (Envelope) args.NewValue;

if (extent != null)

{

mapBox.Map.EnforceMaximumExtents = true;

mapBox.Map.MaximumExtents = extent;

}

}

/// <summary>

/// Gets called when changes on MapExtent

/// </summary>

/// <param name="sender">The sender object</param>

/// <param name="args">The event arguments</param>

private static void MapExtentCallback(object sender, DependencyPropertyChangedEventArgs args)

{

var host = sender as SharpMapHost;

if (host == null)

{

return;

}

var mapBox = host._mapBox;

var extent = (Envelope) args.NewValue;

mapBox.Map.ZoomToBox(extent);

mapBox.Refresh();

}

/// <summary>

/// Gets called when changes on MapExtent

/// </summary>

/// <param name="sender">The sender object</param>

/// <param name="args">The event arguments</param>

private static void MapRotationCallback(object sender, DependencyPropertyChangedEventArgs args)

{

var host = sender as SharpMapHost;

if (host == null)

{

return;

}

var mapBox = host._mapBox;

float rotation = (float)args.NewValue;

var mapTransform = new Matrix();

mapTransform.RotateAt(rotation, new PointF(mapBox.Width / 2f, mapBox.Height / 2f));

mapBox.Map.MapTransform = mapTransform;

mapBox.Refresh();

}

/// <summary>

/// Gets called when changes on GeometryDefined

/// </summary>

/// <param name="sender">The sender object</param>

/// <param name="args">The event arguments</param>

private static void GeometryDefinedCallback(object sender, DependencyPropertyChangedEventArgs args)

{

var host = sender as SharpMapHost;

if (host == null)

{

return;

}

if (host._editLayer == null)

{

host._editLayer = new VectorLayer("EditLayer");

host._editLayerGeoProvider = new GeometryProvider(new List<IGeometry>());

host._editLayer.DataSource = host._editLayerGeoProvider;

host.MapLayers.Add(host._editLayer);

}

host._editLayerGeoProvider.Geometries.Clear();

var geom = (IGeometry) args.NewValue;

if (geom != null)

{

host._editLayerGeoProvider.Geometries.Add(geom);

}

host._mapBox.Refresh();

}

/// <summary>

/// Gets called when keyboard key pressed. Pans the map according to arrow keys.

/// </summary>

/// <param name="sender">The sender object</param>

/// <param name="keyEventArgs">The event arguments</param>

private void OnKeyDown(object sender, KeyEventArgs keyEventArgs)

{

var currentEnvelope = _mapBox.Map.Envelope;

var dX = currentEnvelope.Width/2;

var dY = currentEnvelope.Height/2;

var x = _mapBox.Map.Center.X;

var y = _mapBox.Map.Center.Y;

switch (keyEventArgs.Key)

{

case Key.Left:

x -= dX;

keyEventArgs.Handled = true;

break;

case Key.Right:

x += dX;

keyEventArgs.Handled = true;

break;

case Key.Up:

y += dY;

keyEventArgs.Handled = true;

break;

case Key.Down:

y -= dY;

keyEventArgs.Handled = true;

break;

}

_mapBox.Map.Center = new Coordinate(x, y);

_mapBox.Refresh();

}

/// <summary>

/// Gets called when changes in MapLayers

/// </summary>

/// <param name="sender">The sender object</param>

/// <param name="e">The event arguments</param>

private void OnMapLayerChanged(object sender, NotifyCollectionChangedEventArgs e)

{

switch (e.Action)

{

case NotifyCollectionChangedAction.Add:

{

var layers = e.NewItems;

if (layers != null)

{

foreach (var layer in layers)

{

var castedLayer = layer as ILayer;

if (castedLayer != null && _mapBox.Map.Layers.All(l => l.LayerName != castedLayer.LayerName))

_mapBox.Map.Layers.Add(castedLayer);

}

}

}

break;

case NotifyCollectionChangedAction.Remove:

{

var layers = e.OldItems;

if (layers != null)

{

foreach (var layer in layers)

{

var castedLayer = layer as ILayer;

if (castedLayer != null && _mapBox.Map.Layers.Any(l => l.LayerName == castedLayer.LayerName))

_mapBox.Map.Layers.Remove(castedLayer);

}

}

}

break;

case NotifyCollectionChangedAction.Reset:

_mapBox.Map.Layers.Clear();

break;

}

_mapBox.Refresh();

}

public void ZoomToExtents()

{

_mapBox.Map.ZoomToExtents();

_mapBox.Refresh();

}

public void ZoomToEnvelope(Envelope env)

{

_mapBox.Map.ZoomToBox(env);

_mapBox.Refresh();

}

/// <summary>

/// Gets called when mouse moves over map

/// </summary>

/// <param name="worldPos">The click coordinate</param>

/// <param name="mouseEventArgs">The event arguments</param>

private void MapBoxOnMouseMove(Coordinate worldPos, MouseEventArgs mouseEventArgs)

{

_currentMouseCoordinate = worldPos;

if (PropertyChanged != null)

{

PropertyChanged(this, new PropertyChangedEventArgs("CurrentMouseCoordinate"));

PropertyChanged(this, new PropertyChangedEventArgs("CurrentMouseCoordinateString"));

}

}

public event PropertyChangedEventHandler PropertyChanged;

}

}