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Copy pathMiniMapControl.cs
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849 lines (728 loc) · 29.3 KB
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// Copyright 2014 - Spartaco Giubbolini (spartaco@sgsoftware.it), portions by Felix Obermaier (www.ivv-aachen.de)
//
// This file is part of SharpMap.UI.
// SharpMap.UI 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.UI 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;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Runtime.Serialization;
using System.Security.Permissions;
using System.Threading.Tasks;
using System.Windows.Forms;
using GeoAPI.Geometries;
namespace SharpMap.Forms
{
/// <summary>
/// This control displays a minimap of the whole extension of a map, and let the user drag the viewport.
/// </summary>
[Serializable]
public partial class MiniMapControl : Control
{
/// <summary>
/// Enumeration of possible hit results
/// </summary>
protected enum HitResult
{
/// <summary>
/// Not hit anything at all
/// </summary>
None,
/// <summary>
/// Hit inside the frame
/// </summary>
InsideFrame,
/// <summary>
/// Hit resize north-west corner
/// </summary>
SizeNW,
/// <summary>
/// Hit resize north-east corner
/// </summary>
SizeNE,
/// <summary>
/// Hit resize south-west corner
/// </summary>
SizeSW,
/// <summary>
/// Hit resize south-east corner
/// </summary>
SizeSE
}
#region fields
private const int CornerMouseLength = 8;
private const int CornerMouseSensibility = 1;
private MapBox _mapBoxControl;
[NonSerialized]
private Timer _resizeTimer;
private int _resizeInterval = 500;
private volatile int _generation;
private volatile Map _currentMap;
private Rectangle _frame;
private bool _mouseDown;
private BorderStyle _borderStyle = BorderStyle.Fixed3D;
private DashStyle _framePenDashStyle = DashStyle.Solid;
private PenAlignment _framePenAlignment = PenAlignment.Center;
private int _frameHalo;
private Color _frameBrushColor = Color.Red;
private Color _framePenColor = Color.Red;
private int _framePenWidth = 2;
private float _opacity;
private Color _frameHaloColor;
private Point _translate;
private Cursor _oldCursor;
private HitResult _hitResult;
private Guid _mapId = Guid.NewGuid();
[ThreadStatic]
private static bool _isRenderingThread;
#endregion
#region ctor
/// <summary>
/// Creates an instance of this class
/// </summary>
public MiniMapControl()
{
SetStyle(ControlStyles.AllPaintingInWmPaint |
ControlStyles.OptimizedDoubleBuffer |
ControlStyles.UserPaint, true);
base.DoubleBuffered = true;
_resizeTimer = new Timer { Interval = ResizeInterval };
_resizeTimer.Tick += HandleResizeTimerTick;
}
#endregion
#region properties
/// <summary>
/// Gets a value indicating if the current thread is rendering the map.
/// </summary>
/// <remarks>A layer could use this value to customize the rendering into the minimap.</remarks>
public static bool IsRenderingThread
{
get { return _isRenderingThread; }
}
//public event EventHandler ResizeIntervalChanged;
//protected virtual void OnResizeIntervalChanged(EventArgs e)
//{
// _resizeTimer.Stop();
// _resizeTimer.Interval = _resizeInterval;
// _resizeTimer.Start();
// var handler = ResizeIntervalChanged;
// if (handler != null) handler(this, e);
//}
/// <summary>
/// Gets or sets a value indicating the interval between two MapControl.Resize events
/// </summary>
public int ResizeInterval
{
get { return _resizeInterval; }
set
{
if (value == _resizeInterval)
return;
if (value < 1)
throw new ArgumentException("The resize interval must be a positive value");
_resizeInterval = value;
_resizeTimer.Stop();
_resizeTimer.Interval = _resizeInterval;
_resizeTimer.Start();
//OnResizeIntervalChanged(EventArgs.Empty);
}
}
/// <summary>
/// Gets or sets a value indicating if the viewport frame should have a halo
/// </summary>
[Description("If set, a halo effect is drawn around the viewport frame")]
[Category("Frame Appearance")]
[DefaultValue(0)]
public int FrameHalo
{
get { return _frameHalo; }
set
{
if (value == _frameHalo)
return;
_frameHalo = value;
Refresh();
}
}
/// <summary>
/// Gets or sets a value indicating the color of the the viewport frame halo
/// </summary>
[Description("If set, a halo effect is drawn around the viewport frame")]
[Category("Frame Appearance")]
[DefaultValue(typeof(Color), "System.Drawing.Color.White")]
public Color FrameHaloColor
{
get { return _frameHaloColor; }
set
{
if (_frameHaloColor == value)
return;
_frameHaloColor = value;
Refresh();
}
}
/// <summary>
/// Gets or sets a value indicating the pen alignment used when drawing the frame
/// </summary>
[Description("The pen alignment used when drawing the frame")]
[Category("Frame Appearance")]
[DefaultValue(typeof(PenAlignment), "System.Drawing.PenAlignment.Center")]
public PenAlignment FramePenAlignment
{
get { return _framePenAlignment; }
set
{
if (value == _framePenAlignment)
return;
_framePenAlignment = value;
Refresh();
//OnFramePenAlignmentChanged(EventArgs.Empty);
}
}
///// <summary>
///// Event raised when the <see cref="FramePenAlignment"/> has changed
///// </summary>
//public event EventHandler FramePenAlignmentChanged;
///// <summary>
///// Event invoker for the <see cref="FramePenAlignmentChanged"/> event.
///// </summary>
///// <param name="e">The events arguments</param>
//protected virtual void OnFramePenAlignmentChanged(EventArgs e)
//{
// Refresh();
// var h = FramePenAlignmentChanged;
// if (h != null) h(this, e);
//}
/// <summary>
/// Gets or sets a value indicating the pen alignment used when drawing the frame
/// </summary>
[Description("The dash style used when drawing the frame")]
[Category("Frame Appearance")]
[DefaultValue(typeof(DashStyle), "System.Drawing.DashStyle.Solid")]
public DashStyle FramePenDashStyle
{
get { return _framePenDashStyle; }
set
{
if (value == _framePenDashStyle)
return;
if (value == DashStyle.Custom)
throw new NotSupportedException("DashStyle.Custom is not supported");
_framePenDashStyle = value;
Refresh();
//OnFramePenDashStyleChanged(EventArgs.Empty);
}
}
///// <summary>
///// Event raised when the <see cref="FramePenDashStyle"/> has changed
///// </summary>
//public event EventHandler FramePenDashStyleChanged;
///// <summary>
///// Event invoker for the <see cref="FramePenDashStyleChanged"/> event.
///// </summary>
///// <param name="e">The events arguments</param>
//protected virtual void OnFramePenDashStyleChanged(EventArgs e)
//{
// Refresh();
// var h = FramePenDashStyleChanged;
// if (h != null) h(this, e);
//}
/// <summary>
/// Gets or sets a value indicating the <see cref="MapBox"/> control linked to the mini map.
/// </summary>
[DefaultValue(null)]
public MapBox MapControl
{
get { return _mapBoxControl; }
set
{
UnhookEvents();
_mapBoxControl = value;
HookEvents();
Cursor = value == null ? Cursors.Default : Cursors.Hand;
}
}
/// <summary>
/// Gets or sets a value indicating the border style
/// </summary>
[Category("Appearance")]
[Description("Defines the border style")]
[DefaultValue(BorderStyle.Fixed3D)]
public BorderStyle BorderStyle
{
get { return _borderStyle; }
set
{
if (_borderStyle == value)
return;
_borderStyle = value;
UpdateStyles();
//OnBorderStyleChanged(EventArgs.Empty);
}
}
///// <summary>
///// Event raised when <see cref="BorderStyle"/> has changed
///// </summary>
//public event EventHandler BorderStyleChanged;
///// <summary>
///// Event invoker for the <see cref="BorderStyleChanged"/> event.
///// </summary>
///// <param name="e">The event's arguments</param>
//protected virtual void OnBorderStyleChanged(EventArgs e)
//{
// var h = BorderStyleChanged;
// if (h != null) h(this, e);
//}
/// <summary>
/// Gets or sets a value indicating the color of the pen that draws the frame
/// </summary>
[Description("The color of the pen that draws the frame")]
[Category("Frame Appearance")]
[DefaultValue(typeof(Color), "Red")]
public Color FramePenColor
{
get { return _framePenColor; }
set
{
if (value == _framePenColor)
return;
_framePenColor = value;
Refresh();
}
}
/// <summary>
/// Gets or sets a value indicating the color of the brush that fills the frame
/// </summary>
[Description("The color of the brush that fills the frame")]
[Category("Frame Appearance")]
[DefaultValue(typeof(Color), "Transparent")]
public Color FrameBrushColor
{
get { return _frameBrushColor; }
set
{
if (value == _frameBrushColor)
return;
_frameBrushColor = value;
Refresh();
}
}
/// <summary>
/// Gets or sets a value indicating the width of the pen that draws the frame
/// </summary>
[Description("The width of the pen that draws the frame")]
[Category("Frame Appearance")]
[DefaultValue(2)]
public int FramePenWidth
{
get { return _framePenWidth; }
set
{
if (value < 1) value = 1;
if (value == _framePenWidth)
return;
_framePenWidth = value;
Refresh();
}
}
/// <summary>
/// Gets or sets a value indicating the opacity of the brush used to fill the frame
/// </summary>
[Description("The opacity of the brush used to fill the frame")]
[Category("Frame Appearance")]
[DefaultValue(0f)]
public float Opacity
{
get { return _opacity; }
set
{
if (value < 0f) value = 0f;
if (value > 1f) value = 1f;
if (value == _opacity)
return;
_opacity = value;
Refresh();
}
}
#endregion
#region protected members
/// <summary>
/// Returns a value that determines what the provided location hits
/// </summary>
/// <param name="x"></param>
/// <param name="y"></param>
/// <returns></returns>
protected HitResult HitTest(int x, int y)
{
if ((x >= _frame.X - CornerMouseSensibility &&
x <= _frame.X + CornerMouseLength &&
y >= _frame.Y - CornerMouseSensibility && y <= _frame.Y + CornerMouseSensibility) ||
(x >= _frame.X - CornerMouseSensibility && x <= _frame.X + CornerMouseSensibility &&
y >= _frame.Y - CornerMouseSensibility &&
y <= _frame.Y + CornerMouseLength))
return HitResult.SizeNW;
if ((x >= _frame.Right - CornerMouseLength && x < _frame.Right + CornerMouseSensibility &&
y >= _frame.Y - CornerMouseSensibility && y <= _frame.Y + CornerMouseSensibility) ||
(x >= _frame.Right - CornerMouseSensibility && x <= _frame.Right + CornerMouseSensibility &&
y >= _frame.Y - CornerMouseSensibility && y <= _frame.Y + CornerMouseLength))
return HitResult.SizeNE;
if ((x >= _frame.X - CornerMouseSensibility && x <= _frame.X + CornerMouseLength &&
y >= _frame.Bottom - CornerMouseLength && y <= _frame.Bottom + CornerMouseSensibility) ||
(x >= _frame.X - CornerMouseSensibility && x <= _frame.X + CornerMouseLength &&
y >= _frame.Bottom - CornerMouseLength && y <= _frame.Bottom + CornerMouseSensibility))
return HitResult.SizeSW;
if ((x >= _frame.Right - CornerMouseLength && x < _frame.Right + CornerMouseSensibility &&
y >= _frame.Bottom - CornerMouseSensibility && y <= _frame.Bottom + CornerMouseSensibility) ||
(x >= _frame.Right - CornerMouseSensibility && x <= _frame.Right + CornerMouseSensibility &&
y >= _frame.Bottom - CornerMouseLength && y <= _frame.Bottom + CornerMouseSensibility))
return HitResult.SizeSE;
if (x >= _frame.X && x <= _frame.Right && y >= _frame.Y && y <= _frame.Bottom)
return HitResult.InsideFrame;
return HitResult.None;
}
/// <inheritdoc cref="Control.Refresh"/>
public override void Refresh()
{
CreateMiniMap();
base.Refresh();
}
/// <inheritdoc cref="Control.CreateParams"/>
protected override CreateParams CreateParams
{
[SecurityPermission(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.UnmanagedCode)]
get
{
CreateParams createParams = base.CreateParams;
createParams.ExStyle |= 65536;
createParams.ExStyle &= -513;
createParams.Style &= -8388609;
switch (_borderStyle)
{
case BorderStyle.FixedSingle:
createParams.Style |= 8388608;
break;
case BorderStyle.Fixed3D:
createParams.ExStyle |= 512;
break;
}
return createParams;
}
}
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (_resizeTimer != null))
{
_resizeTimer.Dispose();
}
base.Dispose(disposing);
}
/// <inheritdoc cref="Control.OnMouseDown"/>
protected override void OnMouseDown(MouseEventArgs e)
{
base.OnMouseDown(e);
if (e.Button != MouseButtons.Left)
return;
if (_hitResult == HitResult.None)
{
_translate = Point.Empty;
_frame = CalculateNewFrame(e.X, e.Y);
}
else
{
_translate = new Point(Convert.ToInt32(e.X - (_frame.X + _frame.Width * 0.5)),
Convert.ToInt32(e.Y - (_frame.Y + _frame.Height * 0.5)));
}
Rectangle clippingRect;
switch (_hitResult)
{
case HitResult.None:
case HitResult.InsideFrame:
clippingRect = ClientRectangle;
break;
case HitResult.SizeNW:
clippingRect = new Rectangle(ClientRectangle.X, ClientRectangle.Y, _frame.Right, _frame.Bottom);
break;
case HitResult.SizeNE:
clippingRect = new Rectangle(_frame.X, ClientRectangle.Y, ClientRectangle.Width - _frame.X, _frame.Bottom);
break;
case HitResult.SizeSW:
clippingRect = new Rectangle(ClientRectangle.X, _frame.Y, _frame.Right - ClientRectangle.X,
ClientRectangle.Height - _frame.Y);
break;
case HitResult.SizeSE:
clippingRect = new Rectangle(_frame.X, _frame.Y, ClientRectangle.Width - _frame.X,
ClientRectangle.Height - _frame.Y);
break;
default:
clippingRect = ClientRectangle;
break;
}
Cursor.Clip = RectangleToScreen(clippingRect);
_mouseDown = true;
}
/// <inheritdoc cref="Control.OnMouseMove"/>
protected override void OnMouseMove(MouseEventArgs e)
{
base.OnMouseMove(e);
if (_mouseDown)
{
switch (_hitResult)
{
case HitResult.InsideFrame:
_frame = CalculateNewFrame(e.X - _translate.X, e.Y - _translate.Y);
break;
case HitResult.None:
_frame = CalculateNewFrame(e.X, e.Y);
break;
case HitResult.SizeNW:
_frame = new Rectangle(e.X, e.Y, _frame.Right - e.X, _frame.Bottom - e.Y);
break;
case HitResult.SizeNE:
_frame = new Rectangle(_frame.X, e.Y, e.X - _frame.X, _frame.Bottom - e.Y);
break;
case HitResult.SizeSW:
_frame = new Rectangle(e.X, _frame.Y, _frame.Right - e.X, e.Y - _frame.Y);
break;
case HitResult.SizeSE:
_frame = new Rectangle(_frame.X, _frame.Y, e.X - _frame.X, e.Y - _frame.Y);
break;
}
Invalidate();
}
else
{
_hitResult = HitTest(e.X, e.Y);
if (_hitResult == HitResult.SizeNW || _hitResult == HitResult.SizeSE)
{
if (_oldCursor == null)
_oldCursor = Cursor;
Cursor = Cursors.SizeNWSE;
}
else if (_hitResult == HitResult.SizeNE || _hitResult == HitResult.SizeSW)
{
if (_oldCursor == null)
_oldCursor = Cursor;
Cursor = Cursors.SizeNESW;
}
else if (_oldCursor != null)
{
Cursor = _oldCursor;
_oldCursor = null;
}
}
}
/// <inheritdoc cref="Control.OnMouseUp"/>
protected override void OnMouseUp(MouseEventArgs e)
{
base.OnMouseUp(e);
if (MapControl != null && _currentMap != null && _mouseDown)
{
var newCenter =
_currentMap.ImageToWorld(new PointF(
Convert.ToInt32(_frame.X + _frame.Width * 0.5),
Convert.ToInt32(_frame.Y + _frame.Height * 0.5)));
MapControl.Map.Center = newCenter;
if (_hitResult != HitResult.None && _hitResult != HitResult.InsideFrame)
{
var p1 = _currentMap.ImageToWorld(_frame.Location);
var p2 = _currentMap.ImageToWorld(new PointF(_frame.X + _frame.Width, _frame.Y + _frame.Height));
MapControl.Map.ZoomToBox(new Envelope(p1.X, p2.X, p1.Y, p2.Y));
}
MapControl.Refresh();
Invalidate();
Cursor.Clip = Rectangle.Empty;
}
_mouseDown = false;
}
/// <inheritdoc cref="Control.OnPaint"/>
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
try
{
if (DesignMode)
{
var width = Convert.ToInt32(ClientSize.Width * 0.5);
var height = width * (MapControl != null
? (double)MapControl.ClientSize.Height / MapControl.ClientSize.Width
: (double)ClientSize.Height / ClientSize.Width);
DrawFrame(e.Graphics, new Rectangle(
Convert.ToInt32(ClientSize.Width * 0.2), Convert.ToInt32(ClientSize.Height * 0.3),
width, Convert.ToInt32(height)));
//DrawFrame(e.Graphics, new Rectangle(
// Convert.ToInt32(ClientSize.Width * 0.2), Convert.ToInt32(ClientSize.Height * 0.3),
// Convert.ToInt32(ClientSize.Width * 0.5), Convert.ToInt32(ClientSize.Height * 0.7)));
}
else
{
DrawFrame(e.Graphics, _frame);
}
}
catch (OverflowException)
{
// sometimes can happen this exception if the frame rectangle is too big, we can simply skip it
}
}
#endregion
#region private members
private Rectangle CalculateNewFrame(int x, int y)
{
return new Rectangle(
x - Convert.ToInt32(_frame.Width * 0.5),
y - Convert.ToInt32(_frame.Height * 0.5),
Convert.ToInt32(_frame.Width),
Convert.ToInt32(_frame.Height));
}
private void HookEvents()
{
if (_mapBoxControl == null)
return;
_mapBoxControl.MapRefreshed += OnMapBoxRendered;
SizeChanged += OnSizeChanged;
}
private void OnSizeChanged(object sender, EventArgs eventArgs)
{
_resizeTimer.Stop();
_resizeTimer.Start();
}
private void OnMapBoxRendered(object sender, EventArgs e)
{
if (InvokeRequired)
BeginInvoke(new Action(CreateMiniMap));
else
CreateMiniMap();
}
private void CreateMiniMap()
{
if (_mapBoxControl == null)
return;
var clonedMap = _mapBoxControl.Map.Clone();
clonedMap.ID = _mapId;
clonedMap.Decorations.Clear();
clonedMap.EnforceMaximumExtents = false;
clonedMap.MaximumExtents = null;
clonedMap.MinimumZoom = Double.Epsilon;
clonedMap.MaximumZoom = Double.MaxValue;
var tsk = Task.Factory.StartNew(new Func<object, Tuple<Image, int, Rectangle>>(GenerateMap), new object[] { ++_generation, clonedMap });
tsk.ContinueWith(t =>
{
if (t.Result != null)
{
if (t.Result.Item2 == _generation)
{
_currentMap = clonedMap;
BackgroundImage = t.Result.Item1;
_frame = t.Result.Item3;
}
}
}, TaskScheduler.FromCurrentSynchronizationContext());
}
private void UnhookEvents()
{
if (_mapBoxControl == null)
return;
_mapBoxControl.MapRefreshed -= OnMapBoxRendered;
SizeChanged -= OnMapBoxRendered;
}
private void DrawFrame(Graphics g, Rectangle rect)
{
if (rect == Rectangle.Empty)
return;
var oldSmoothingMode = g.SmoothingMode;
g.SmoothingMode = SmoothingMode.AntiAlias;
if (FrameBrushColor != Color.Transparent && Opacity != 0)
{
using (var b = new SolidBrush(Color.FromArgb(Convert.ToInt32(Opacity * 255), FrameBrushColor)))
g.FillRectangle(b, rect);
}
if (FrameHalo > 0)
{
using (var newPen = new Pen(FrameHaloColor, FramePenWidth + _frameHalo))
{
g.DrawRectangle(newPen, rect);
}
}
using (var newPen = new Pen(FramePenColor, FramePenWidth))
{
newPen.DashStyle = FramePenDashStyle;
newPen.Alignment = FramePenAlignment;
g.DrawRectangle(newPen, rect);
}
g.SmoothingMode = oldSmoothingMode;
}
private Tuple<Image, int, Rectangle> GenerateMap(object state)
{
var args = (object[])state;
var currentGeneration = (int)args[0];
try
{
_isRenderingThread = true;
var map = (Map) args[1];
Image img = null;
Rectangle frame;
if (map.Layers.Count > 0 && Height > 0 && Width > 0)
{
var originalCenter = map.Center;
var originalWidth = map.Zoom;
var originalHeight = map.MapHeight;
var wx1 = originalCenter.X - originalWidth*0.5;
var wy1 = originalCenter.Y - originalHeight*0.5;
var wx2 = originalCenter.X + originalWidth*0.5;
var wy2 = originalCenter.Y + originalHeight*0.5;
map.Size = Size;
map.ZoomToExtents();
img = map.GetMap();
var np1 = map.WorldToImage(new Coordinate(wx1, wy1));
var np2 = map.WorldToImage(new Coordinate(wx2, wy2));
frame = new Rectangle(
Convert.ToInt32(np1.X),
Convert.ToInt32(np2.Y),
Convert.ToInt32(Math.Abs(np2.X - np1.X)),
Convert.ToInt32(Math.Abs(np1.Y - np2.Y)));
}
else
{
frame = Rectangle.Empty;
}
return new Tuple<Image, int, Rectangle>(img, currentGeneration, frame);
}
catch (Exception)
{
return new Tuple<Image, int, Rectangle>(new Bitmap(1, 1), currentGeneration, Rectangle.Empty);
}
finally
{
_isRenderingThread = false;
}
}
private void HandleResizeTimerTick(object sender, EventArgs e)
{
_resizeTimer.Stop();
OnMapBoxRendered(sender, e);
}
[OnDeserialized]
internal void OnDeserialized(StreamingContext context)
{
_resizeTimer = new Timer { Interval = _resizeInterval };
_resizeTimer.Tick += HandleResizeTimerTick;
_resizeTimer.Start();
}
#endregion
}
}
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