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using System;
using System.Windows.Forms;
using QuickRoute.BusinessEntities;
using System.Drawing;
namespace QuickRoute.Controls
{
public partial class LineGraphControl : UserControl
{
private LineGraph graph = new LineGraph();
private Bitmap graphBitmap;
private Bitmap hoverBitmap;
private double? hoverXValue;
private readonly Pen haircrossPen = new Pen(Color.FromArgb(128, Color.Red), 1);
private readonly DiscAndCircleDrawer haircrossMarker =
new DiscAndCircleDrawer(Color.FromArgb(192, Color.Red), 4,
Color.FromArgb(192, Color.Black), 6, 2);
public event EventHandler<Canvas.RouteMouseHoverEventArgs> GraphMouseHover;
public event EventHandler<Canvas.RouteMouseHoverEventArgs> GraphMouseDown;
public event EventHandler<Canvas.RouteMouseHoverEventArgs> GraphMouseUp;
public LineGraphControl()
{
InitializeComponent();
}
~LineGraphControl()
{
haircrossPen.Dispose();
if (graphBitmap != null) graphBitmap.Dispose();
if (hoverBitmap != null) hoverBitmap.Dispose();
}
public LineGraph Graph
{
get { return graph; }
set { graph = value; }
}
public double? HoverXValue
{
get { return hoverXValue; }
set
{
hoverXValue = value;
Draw();
}
}
private void LineGraphControl_Paint(object sender, PaintEventArgs e)
{
Draw(e.Graphics);
}
private void LineGraphControl_Resize(object sender, System.EventArgs e)
{
Create();
Draw();
}
public void Create()
{
if (graphBitmap != null) graphBitmap.Dispose();
if (hoverBitmap != null) hoverBitmap.Dispose();
if (Width > 0 && Height > 0)
{
graphBitmap = new Bitmap(Width, Height);
hoverBitmap = new Bitmap(Width, Height);
Graphics g = Graphics.FromImage(graphBitmap);
g.Clear(BackColor);
graph.Draw(g, new RectangleF(0, 0, Width, Height));
g.Dispose();
}
else
{
graphBitmap = null;
hoverBitmap = null;
}
}
public void Draw(Graphics g)
{
if (graphBitmap == null) return;
if (hoverXValue.HasValue && hoverXValue.Value >= graph.XAxisMinValue && hoverXValue.Value <= graph.XAxisMaxValue)
{
Graphics hoverGraphics = Graphics.FromImage(hoverBitmap);
hoverGraphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
hoverGraphics.Clear(BackColor);
hoverGraphics.DrawImage(graphBitmap, 0, 0);
PointF centerF = new PointF(graph.ValueToX(hoverXValue.Value),
graph.ValueToY(graph.GetYValueFromXValue(hoverXValue.Value)));
Point center = new Point((int)centerF.X, (int)centerF.Y);
center.Y = Math.Max(graph.GraphDrawingRectangle.Top, Math.Min(graph.GraphDrawingRectangle.Bottom, center.Y));
SizeF size = new SizeF(10, 10);
RectangleF rect = new RectangleF(center.X - size.Width / 2, center.Y - size.Height / 2, size.Width, size.Height);
hoverGraphics.DrawLine(haircrossPen, center, new Point(center.X, graph.GraphDrawingRectangle.Bottom));
hoverGraphics.DrawLine(haircrossPen, new Point(graph.GraphDrawingRectangle.Left, center.Y), new Point(graph.GraphDrawingRectangle.Right, center.Y));
haircrossMarker.Draw(hoverGraphics, new PointD(center.X, center.Y), 1);
g.DrawImage(hoverBitmap, 0, 0);
hoverGraphics.Dispose();
}
else
{
g.DrawImage(graphBitmap, new Point(0, 0));
}
}
public void Draw()
{
Draw(CreateGraphics());
}
private ParameterizedLocation GetParameterizedLocationFromMouseLocation(int x)
{
double? xValue = graph.XToValue(x);
if (xValue < graph.XAxisMinValue || xValue > graph.XAxisMaxValue) xValue = null;
ParameterizedLocation pl = null;
if (xValue != null)
{
DateTime time;
switch (graph.XAxisAttribute)
{
case DomainAttribute.TimeOfDay:
time = new DateTime((long)(xValue.Value * TimeSpan.TicksPerSecond)).ToUniversalTime();
pl = graph.Session.Route.GetParameterizedLocationFromTime(time, true);
break;
case DomainAttribute.ElapsedTime:
time = graph.Session.Route.FirstWaypoint.Time.AddTicks((long)xValue.Value * TimeSpan.TicksPerSecond);
pl = graph.Session.Route.GetParameterizedLocationFromTime(time);
break;
case DomainAttribute.Distance:
pl = graph.Session.Route.GetParameterizedLocationFromDistance(xValue.Value);
break;
}
}
return pl;
}
private void LineGraphControl_MouseMove(object sender, MouseEventArgs e)
{
if (graph.Session == null) return;
hoverXValue = graph.XToValue(e.X);
var pl = GetParameterizedLocationFromMouseLocation(e.X);
if (pl == null || (hoverXValue.HasValue && (hoverXValue.Value < graph.XAxisMinValue || hoverXValue.Value > graph.XAxisMaxValue))) hoverXValue = null;
Draw();
if (GraphMouseHover != null) GraphMouseHover(this, new Canvas.RouteMouseHoverEventArgs(pl, hoverXValue != null));
}
private void LineGraphControl_MouseDown(object sender, MouseEventArgs e)
{
if (graph.Session == null) return;
hoverXValue = graph.XToValue(e.X);
if (hoverXValue.HasValue && hoverXValue.Value >= graph.XAxisMinValue && hoverXValue.Value <= graph.XAxisMaxValue)
{
var pl = GetParameterizedLocationFromMouseLocation(e.X);
if (pl == null) hoverXValue = null; // prevent marker hovering
Draw();
if (GraphMouseDown != null) GraphMouseDown(this, new Canvas.RouteMouseHoverEventArgs(pl, hoverXValue != null));
}
}
private void LineGraphControl_MouseUp(object sender, MouseEventArgs e)
{
if (graph.Session == null) return;
hoverXValue = graph.XToValue(e.X);
if (hoverXValue.HasValue && hoverXValue.Value >= graph.XAxisMinValue && hoverXValue.Value <= graph.XAxisMaxValue)
{
var pl = GetParameterizedLocationFromMouseLocation(e.X);
if (pl == null) hoverXValue = null; // prevent marker hovering
Draw();
if (GraphMouseUp != null) GraphMouseUp(this, new Canvas.RouteMouseHoverEventArgs(pl, hoverXValue != null));
}
}
}
}
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