/// <summary>
/// 图例
/// </summary>
public void DrawLegendColorBar()
{
if (TableValue == null)
{
return;
}
int cellWidth = 12;
int cellHeight = 1;
LineCoordConverter pixeToInputValConverter = new LineCoordConverter(SizeOfLegendColorBar.Height, this.TableValue.ValueSpan.Span);
for (int i = 0; i < SizeOfLegendColorBar.Height; i++)
{
var val = pixeToInputValConverter.GetNew(i) + this.TableValue.ValueSpan.Start; //像素，转换到原始数据，以获取颜色
var color = ColorBuilder.Build(val);
//转回平面坐标
var pt = OriginOfLengendColorBar + new Size(0, i);
var scrPt = UserToScreenCoordConverter.GetScreenCoord(pt);
ChartGraphics.DrawColorPoint(scrPt, cellWidth, cellHeight, color);
}
//绘制文字
ChartGraphics.DrawLabel(Geo.Utils.StringUtil.FillSpaceLeft(this.TableValue.ValueSpan.Start.ToString("0.00"), 6), OriginOfLengendColorBar - new Size(30, 20), 0);
ChartGraphics.DrawLabel(Geo.Utils.StringUtil.FillSpaceLeft(this.TableValue.ValueSpan.End.ToString("0.00"), 6),
OriginOfLengendColorBar + new Size(-30, SizeOfLegendColorBar.Height + 20), 0);
}
/// <summary>
/// 输入原始数据转换为屏幕坐标
/// </summary>
/// <param name="xy"></param>
/// <returns></returns>
private Point InputToScreenPt(XY xy)
{
var userCoord = InputToUserCoord(xy);
var scrPt = UserToScreenCoordConverter.GetScreenCoord(userCoord);
return(scrPt);
}
/// <summary>
/// 绘制带
/// </summary>
/// <param name="pen"></param>
/// <param name="yCoord"></param>
/// <param name="xCoords"></param>
/// <param name="height"></param>
public void DarwBelt(Pen pen, int yCoord, int[] xCoords, int height = 5)
{
var y = UserToScreenCoordConverter.GetScreenY(yCoord);
var xList = new List <int>();
foreach (var item in xCoords)
{
var x = UserToScreenCoordConverter.GetScreenX(item);
xList.Add(x);
}
int halfHeight = height / 2;
foreach (var item in xCoords)
{
var pt = new Point(item, yCoord - halfHeight);
var pt2 = new Point(item, yCoord + halfHeight);
DrawLine(pen, pt, pt2);
}
}
/// <summary>
/// 通过鼠标滚轮实现图的缩放
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void pictureBox1_MouseWheel(object sender, MouseEventArgs e)
{
var location = UserToScreenCoordConverter.GetUserCoord(e.Location);
int userX = location.X;
var epoch = GetEpcohNumber(userX);
int toStartEpochCount = epoch - MinEpoch;
int toEndEpochCount = MaxEpoch - epoch;
if (e.Delta > 0)
{
toStartEpochCount = toStartEpochCount / 2;
toEndEpochCount = toEndEpochCount / 2;
}
else
{
toStartEpochCount = toStartEpochCount * 2;
toEndEpochCount = toEndEpochCount * 2;
}
this.MinEpoch = epoch - toStartEpochCount;
this.MaxEpoch = epoch + toEndEpochCount;
//合法性设置
if (this.MinEpoch < 0)
{
this.MinEpoch = 0;
}
if (this.MaxEpoch > this.DataTable.Rows.Count)
{
this.MaxEpoch = this.DataTable.Rows.Count;
}
if (this.MaxEpoch == 0)
{
this.MaxEpoch = 1;
}
if (this.MinEpoch >= MaxEpoch)
{
this.MinEpoch = MaxEpoch - 1;
}
Draw();
}
/// <summary>
/// 绘制标签
/// </summary>
/// <param name="label"></param>
/// <param name="pt"></param>
/// <param name="font"></param>
/// <param name="brush"></param>
/// <param name="format"></param>
/// <param name="degree"></param>
public void DrawLabel(string label, Point pt, Font font = null, Brush brush = null, StringFormat format = null, float degree = 0)
{
if (font == null)
{
font = DefaultFont;
}
if (brush == null)
{
brush = DefaultBrush;
}
var screenPt = UserToScreenCoordConverter.GetScreenCoord(pt);
// g.DrawString(label, font, brush, screenPt);
// 绘制围绕点旋转的文本
if (format == null)
{
format = DefaultStringFormat;
}
GraphicsText.Graphics = Graphics;
GraphicsText.DrawString(label, font, brush, screenPt, format, degree);
}
/// <summary>
/// 绘制线条。连续绘制
/// </summary>
/// <param name="pen"></param>
/// <param name="pts"></param>
public void DrawLine(Pen pen, params Point[] pts)
{
List <Point> screentPts = new List <Point>();
foreach (var item in pts)
{
screentPts.Add(UserToScreenCoordConverter.GetScreenCoord(item));
}
Point current = Point.Empty;
foreach (var p in screentPts)
{
if (current == Point.Empty)
{
current = p;
continue;
}
g.DrawLine(pen, current, p);
current = p;
}
}
/// <summary>
/// 绘图
/// </summary>
/// <param name="geoCoords"></param>
public Bitmap Draw(List <GeoCoord> geoCoords)
{
if (ChartSize.Width == 0 || ChartSize.Height == 0)
{
return(null);
}
Bitmap bmp = new Bitmap(ChartSize.Width, ChartSize.Height);;
Graphics g = Graphics.FromImage(bmp);
g.Clear(Color.White);
this.UserToScreenCoordConverter = new ScreenCoordConverter(this.ChartSize);
this.GeoCoords = new GeoCoords(geoCoords);
this.ChartGraphics = new Geo.Draw.UserChartGraphics(UserToScreenCoordConverter, g);
InputToContentCoordConverter = new PlainCoordConverter(this.GeoCoords.Size, this.ChartSize, GeoCoords.CoordFrom);
//var ColorBuilder = new TwoStepColorBuilder(this.GeoCoords.HeightSpan, Color.Blue, Color.Yellow, Color.Red);
var ColorBuilder = new ThreeStepColorBuilder(this.GeoCoords.HeightSpan, Color.Blue, Color.Cyan, Color.Yellow, Color.Red);
int cellWidth = (int)Math.Ceiling(InputToContentCoordConverter.XConverter.Factor * GeoCoords.LonInterval);
cellWidth = cellWidth < 1 ? 1 : cellWidth;
int cellHeight = (int)Math.Ceiling(InputToContentCoordConverter.YConverter.Factor * GeoCoords.LatInterval);
cellHeight = cellHeight < 1 ? 1 : cellHeight;
foreach (var geoCoord in geoCoords)
{
var xy = new XY(geoCoord.Lon, geoCoord.Lat);
var pt = InputToContentCoordConverter.GetNewPoint(xy);
var scrPt = UserToScreenCoordConverter.GetScreenCoord(pt);
var color = ColorBuilder.Build(geoCoord.Height);
ChartGraphics.DrawColorPoint(scrPt, cellWidth, cellHeight, color);
}
return(bmp);
// UserChartGraphics.DrawGrid(new Pen(new SolidBrush(Color.FromArgb(100, 100, 100))), 10, 10, Origin, this.ScreenCoordArea.RightTop);
}
/// <summary>
/// 内容坐标转换为屏幕坐标。
/// </summary>
/// <param name="xy"></param>
/// <returns></returns>
private Envelope ContentToScreenCoord(Envelope contentCoord)
{
var userCoord = ContentToUserCoordConverter.GetNew(contentCoord);
return(UserToScreenCoordConverter.ToScreenCoord(userCoord));
}
/// <summary>
/// 内容坐标转换为屏幕坐标。
/// </summary>
/// <param name="xy"></param>
/// <returns></returns>
private Point ContentToScreenCoord(XY contentCoord)
{
var userCoord = ContentToUserCoordConverter.GetNewPoint(contentCoord);
return(UserToScreenCoordConverter.GetScreenCoord(userCoord));
}