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256 lines (224 loc) · 6.29 KB
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using System;
using System.ComponentModel;
using System.Windows;
using System.Windows.Media;
namespace GMap.NET.WindowsPresentation
{
/// <summary>
/// GMap.NET marker
/// </summary>
public class GMapMarker : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
protected void OnPropertyChanged(string name)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(name));
}
}
protected void OnPropertyChanged(PropertyChangedEventArgs name)
{
if (PropertyChanged != null)
{
PropertyChanged(this, name);
}
}
UIElement _shape;
static readonly PropertyChangedEventArgs ShapePropertyChangedEventArgs = new PropertyChangedEventArgs(nameof(Shape));
/// <summary>
/// marker visual
/// </summary>
public UIElement Shape
{
get
{
return _shape;
}
set
{
if (_shape != value)
{
_shape = value;
OnPropertyChanged(ShapePropertyChangedEventArgs);
UpdateLocalPosition();
}
}
}
private PointLatLng _position;
/// <summary>
/// coordinate of marker
/// </summary>
public PointLatLng Position
{
get
{
return _position;
}
set
{
if (_position != value)
{
_position = value;
UpdateLocalPosition();
}
}
}
GMapControl _map;
/// <summary>
/// the map of this marker
/// </summary>
public GMapControl Map
{
get
{
if (Shape != null && _map == null)
{
DependencyObject visual = Shape;
while (visual != null && !(visual is GMapControl))
{
visual = VisualTreeHelper.GetParent(visual);
}
_map = visual as GMapControl;
}
return _map;
}
internal set
{
_map = value;
}
}
/// <summary>
/// custom object
/// </summary>
public object Tag;
Point _offset;
/// <summary>
/// offset of marker
/// </summary>
public Point Offset
{
get
{
return _offset;
}
set
{
if (_offset != value)
{
_offset = value;
UpdateLocalPosition();
}
}
}
int _localPositionX;
static readonly PropertyChangedEventArgs LocalPositionXPropertyChangedEventArgs =
new PropertyChangedEventArgs(nameof(LocalPositionX));
/// <summary>
/// local X position of marker
/// </summary>
public int LocalPositionX
{
get
{
return _localPositionX;
}
internal set
{
if (_localPositionX != value)
{
_localPositionX = value;
OnPropertyChanged(LocalPositionXPropertyChangedEventArgs);
}
}
}
int _localPositionY;
static readonly PropertyChangedEventArgs LocalPositionYPropertyChangedEventArgs =
new PropertyChangedEventArgs(nameof(LocalPositionY));
/// <summary>
/// local Y position of marker
/// </summary>
public int LocalPositionY
{
get
{
return _localPositionY;
}
internal set
{
if (_localPositionY != value)
{
_localPositionY = value;
OnPropertyChanged(LocalPositionYPropertyChangedEventArgs);
}
}
}
int _zIndex;
static readonly PropertyChangedEventArgs ZIndexPropertyChangedEventArgs =
new PropertyChangedEventArgs(nameof(ZIndex));
/// <summary>
/// the index of Z, render order
/// </summary>
public int ZIndex
{
get
{
return _zIndex;
}
set
{
if (_zIndex != value)
{
_zIndex = value;
OnPropertyChanged(ZIndexPropertyChangedEventArgs);
}
}
}
public GMapMarker(PointLatLng pos)
{
Position = pos;
}
internal GMapMarker()
{
}
/// <summary>
/// calls Dispose on shape if it implements IDisposable, sets shape to null and clears route
/// </summary>
public virtual void Clear()
{
var s = Shape as IDisposable;
if (s != null)
{
s.Dispose();
s = null;
}
Shape = null;
}
/// <summary>
/// updates marker position, internal access usualy
/// </summary>
void UpdateLocalPosition()
{
if (Map != null)
{
var p = Map.FromLatLngToLocal(Position);
p.Offset(-(long)Map.MapTranslateTransform.X, -(long)Map.MapTranslateTransform.Y);
LocalPositionX = (int)(p.X + (long)Offset.X);
LocalPositionY = (int)(p.Y + (long)Offset.Y);
}
}
/// <summary>
/// forces to update local marker position
/// dot not call it if you don't really need to ;}
/// </summary>
/// <param name="m"></param>
internal void ForceUpdateLocalPosition(GMapControl m)
{
if (m != null)
{
_map = m;
}
UpdateLocalPosition();
}
}
}