private static List <ChartString> CookDashSigns(ChartOptions options, Offsets offsets, List <int> dashesX, List <int> dashesY)
{
List <ChartString> result = new List <ChartString>();
// X dashes' signs
foreach (int i in dashesX)
{
float tx = options.SizeX * (i - options.MinX) / (options.MaxX - options.MinX);
if (i != 0 && tx - i.ToString().Length *AproximateCharWidth >= 0 &&
tx + i.ToString().Length *AproximateCharWidth <= options.SizeX)
{
result.Add(new ChartString {
Location = new PointF(tx - i.ToString().Length *AproximateCharWidth, offsets.SignOffsetX), Text = i.ToString()
});
}
}
// Y dashes signs
foreach (int i in dashesY)
{
float ty = options.SizeY - options.SizeY * (i - options.MinY) / (options.MaxY - options.MinY);
if (i != 0 && ty - i.ToString().Length *AproximateCharHigh >= 0 &&
ty + i.ToString().Length *AproximateCharHigh <= options.SizeY)
{
result.Add(new ChartString {
Location = new PointF(offsets.SignOffsetY, ty - AproximateCharHigh), Text = i.ToString()
});
}
}
return(result);
}
private static List <ChartLine> CookDashLines(ChartOptions options, Offsets offsets, float xAxisLocation, float yAxisLocation, List <int> dashesX, List <int> dashesY)
{
List <ChartLine> result = new List <ChartLine>();
// X axis dashes
foreach (int i in dashesX)
{
float tx = options.SizeX * (i - options.MinX) / (options.MaxX - options.MinX);
if (xAxisLocation == -1 || tx <= options.SizeX - AxisArrowLength)
{
result.Add(new ChartLine {
Start = new PointF(tx, offsets.DashStartX), End = new PointF(tx, offsets.DashEndX)
});
}
}
// Y axis dashes
foreach (int i in dashesY)
{
float ty = options.SizeY - options.SizeY * (i - options.MinY) / (options.MaxY - options.MinY);
if (yAxisLocation == -1 || ty >= AxisArrowLength)
{
result.Add(new ChartLine {
Start = new PointF(offsets.DashStartY, ty), End = new PointF(offsets.DashEndY, ty)
});
}
}
return(result);
}
private static Bitmap DrawGrid(List <ChartLine> gridLines, ChartOptions options)
{
Bitmap result = new Bitmap(options.SizeX + 1, options.SizeY + 1);
DrawLines(result, gridLines, GridPen);
return(result);
}
public static Offsets Cook(ChartOptions options, float xAxisLocation, float yAxisLocation)
{
// X axis elements
Offsets result = new Offsets();
if (options.MinY >= 0)
{
result.DashStartX = options.SizeY - DashLengthHalf;
result.DashEndX = options.SizeY;
result.SignOffsetX = options.SizeY - SignOffsetAboveLeft;
}
else if (options.MaxY <= 0)
{
result.DashStartX = 1;
result.DashEndX = DashLengthHalf + 1;
result.SignOffsetX = DashLengthHalf + 1;
}
else
{
result.DashStartX = (int)Math.Round(xAxisLocation - DashLengthHalf);
result.DashEndX = (int)Math.Round(xAxisLocation + DashLengthHalf);
if (Math.Abs(options.MinY) > options.MaxY)
{
result.SignOffsetX = (int)Math.Round(xAxisLocation) + DashLengthHalf + 1;
}
else
{
result.SignOffsetX = (int)Math.Round(xAxisLocation) - SignOffsetAboveLeft;
}
}
// Y axis elements
if (options.MinX >= 0)
{
result.DashStartY = 1;
result.DashEndY = DashLengthHalf + 1;
result.SignOffsetY = DashLengthHalf + 1;
}
else if (options.MaxX <= 0)
{
result.DashStartY = options.SizeX - DashLengthHalf;
result.DashStartY = options.SizeX;
result.SignOffsetY = options.SizeX - SignOffsetAboveLeft;
}
else
{
result.DashStartY = (int)Math.Round(yAxisLocation - DashLengthHalf);
result.DashEndY = (int)Math.Round(yAxisLocation + DashLengthHalf);
if (Math.Abs(options.MinX) > options.MaxX)
{
result.SignOffsetY = (int)Math.Round(yAxisLocation) - SignOffsetAboveLeft;
}
else
{
result.SignOffsetY = (int)Math.Round(yAxisLocation) + DashLengthHalf + 1;
}
}
return(result);
}
private static List <ChartLine> CookAxisLines(ChartOptions options, out float xAxisLocation, out float yAxisLocation)
{
List <ChartLine> result = new List <ChartLine>();
xAxisLocation = -1;
yAxisLocation = -1;
// X Axis and arrow
if (options.MinY <= 0 && options.MaxY >= 0)
{
xAxisLocation = options.SizeY - options.SizeY * (-options.MinY) / (-options.MinY + options.MaxY);
if (xAxisLocation < 0.5)
{
xAxisLocation = 1;
}
result.Add(new ChartLine {
Start = new PointF(0, xAxisLocation), End = new PointF(options.SizeX, xAxisLocation)
});
if (options.MinY < 0)
{
result.Add(new ChartLine {
Start = new PointF(options.SizeX - AxisArrowLength, xAxisLocation + AxisArrowWidth), End = new PointF(options.SizeX, xAxisLocation)
});
}
if (options.MaxY > 0)
{
result.Add(new ChartLine {
Start = new PointF(options.SizeX - AxisArrowLength, xAxisLocation - AxisArrowWidth), End = new PointF(options.SizeX, xAxisLocation)
});
}
}
// Y Axis and arrow
if (options.MinX <= 0 && options.MaxX >= 0)
{
yAxisLocation = options.SizeX * (-options.MinX) / (-options.MinX + options.MaxX);
if (yAxisLocation < 0.5)
{
yAxisLocation = 1;
}
result.Add(new ChartLine {
Start = new PointF(yAxisLocation, 0), End = new PointF(yAxisLocation, options.SizeY)
});
if (options.MinX < 0)
{
result.Add(new ChartLine {
Start = new PointF(yAxisLocation - AxisArrowWidth, AxisArrowLength + 1), End = new PointF(yAxisLocation, 1)
});
}
if (options.MaxX > 0)
{
result.Add(new ChartLine {
Start = new PointF(yAxisLocation + AxisArrowWidth, AxisArrowLength + 1), End = new PointF(yAxisLocation, 1)
});
}
}
return(result);
}
private static List <List <PointF> > CalculateChartGraph(ChartOptions chartOptions, MathFunction f)
{
List <List <PointF> > allFragments = new List <List <PointF> >();
List <PointF> fragment = new List <PointF>();
for (int i = 1; i <= chartOptions.SizeX; i++)
{
// Cook curve fragments (list of points for every fragment)
double x = GetRealX(chartOptions, i);
double y = f(x);
if (double.IsInfinity(y) || double.IsNaN(y)) // For example: when processing x asymptote or logarithm of negative value
{
if (fragment.Count > 0)
{
allFragments.Add(fragment); fragment = new List <PointF>();
}
}
else
{
float wy = GetRealY(chartOptions, (float)y);
if ((float)y > chartOptions.MaxY || (float)y < chartOptions.MinY)
{
if (fragment.Count > 0)
{
fragment.Add(new PointF(i, wy));
allFragments.Add(fragment);
fragment = new List <PointF>();
}
}
else
{
if (fragment.Count == 0)
{
fragment.Add(new PointF(i, wy));
}
else
{
fragment.Add(new PointF(i, wy));
}
}
}
}
if (fragment.Count > 0)
{
allFragments.Add(fragment);
}
return(allFragments);
}
private static int DetectStep(ChartOptions options)
{
int step;
if ((options.MaxX - options.MinX) > (options.MaxY - options.MinY))
{
step = Convert.ToInt32(Math.Round((options.MaxX - options.MinX) / StepDeviderMax));
}
else
{
step = Convert.ToInt32(Math.Round((options.MaxY - options.MinY) / StepDeviderMax));
}
if (step == 0)
{
step = 1;
}
return(step);
}
private void Build_Click(object sender, EventArgs e)
{
if (Func_box.Text != null)
{
Func_box.Text = Func_box.Text.Replace(" ", "");
}
if (string.IsNullOrEmpty(Func_box.Text))
{
MessageBox.Show("Не задана функция графика"); return;
}
// Code generation of math function
MathFuncCodeGenerator generatedFuncCode = MathFuncCodeGenerator.Generate(Func_box.Text);
if (string.IsNullOrEmpty(generatedFuncCode.Error))
{
FuncCode_box.Text = "Код функции : " + generatedFuncCode.OutputText;
}
else
{
MessageBox.Show("Ошибка : " + generatedFuncCode.Error); return;
}
// Compile (with reflection) method with generated math function
CompiledMathFunction compiledMathFunction = MathFuncCodeCompiler.CompileMathFuction(generatedFuncCode.OutputText);
if (!string.IsNullOrWhiteSpace(compiledMathFunction.Error))
{
FuncCode_box.Text = $"{FuncCode_box.Text}\nВозникли ошибки компиляции: {compiledMathFunction.Error}";
return;
}
ChartOptions chartOptions =
AnalyzeChartInputParametersAndCookChartOptions(Xmin_box.Text, Xmax_box.Text, Ymin_box.Text, Ymax_box.Text);
if (chartOptions.Errors.Count > 0)
{
MessageBox.Show("Обнаружны ошибки задания диапазона: " + string.Join("! ", chartOptions.Errors)); return;
}
// Create ChartWindow form
ChartWindow f = new ChartWindow();
f.InitializeChart(Func_box.Text, chartOptions, compiledMathFunction.Func);
f.Show();
}
public void InitializeChart(string mathFuncText, ChartOptions chartParametrs, MathFunction mathFunc)
{
FunctionLabel.Text = "y=" + mathFuncText;
// Adjusting of window and chart area
Size = new Size(chartParametrs.SizeX + 23, chartParametrs.SizeY + 66);
FormBorderStyle = FormBorderStyle.FixedSingle;
Chart.Size = new Size(chartParametrs.SizeX + 1, chartParametrs.SizeY + 1);
Chart.Location = new Point(3, 23);
Chart.Visible = true;
// Initialization and drawing of chart images
Images = new ChartWindowGraphics(chartParametrs);
Images.CookBitmaps();
Images.AddChartImage(ChartImageGraphics.GetChartImage(chartParametrs, mathFunc));
// Initialization and adjusting of axis/grid options' checks
GridOption.Location = new Point(chartParametrs.SizeX - 100, 3);
AxisOption.Location = new Point(chartParametrs.SizeX - 40, 3);
AxisOption.Checked = true;
GridOption.Checked = false;
}
private static Bitmap DrawImage(ChartOptions chartOptions, List <List <PointF> > allFragments)
{
Bitmap image = new Bitmap(chartOptions.SizeX + 1, chartOptions.SizeY + 1);
Graphics g = Graphics.FromImage(image);
using (g)
{
g.Clear(Color.White);
Pen p = new Pen(Color.Blue, 2);
p.Alignment = System.Drawing.Drawing2D.PenAlignment.Center;
foreach (List <PointF> onef in allFragments)
{
if (onef.Count == 1)
{
onef.Add(onef[0]);
} // If fragment contains only 1 point - add the same second point in order to draw line
g.DrawCurve(p, onef.ToArray());
}
}
return(image);
}
private static List <ChartLine> CookGridLines(ChartOptions options, List <int> dashesX, List <int> dashesY)
{
List <ChartLine> result = new List <ChartLine>();
// Y parallels
foreach (int i in dashesX)
{
float tx = options.SizeX * (i - options.MinX) / (options.MaxX - options.MinX);
result.Add(new ChartLine {
Start = new PointF(tx, 0), End = new PointF(tx, options.SizeY + 1)
});
}
// X parallels
foreach (int i in dashesY)
{
float ty = options.SizeY - options.SizeY * (i - options.MinY) / (options.MaxY - options.MinY);
result.Add(new ChartLine {
Start = new PointF(0, ty), End = new PointF(options.SizeX + 1, ty)
});
}
return(result);
}
public ChartWindowGraphics(ChartOptions options)
{
Options = options;
}
public static ChartOptions AnalyzeChartInputParametersAndCookChartOptions(
string minX, string maxX, string minY, string maxY)
{
ChartOptions chartOptions = new ChartOptions();
chartOptions.Errors = new List <string>();
if (!float.TryParse(minX, out chartOptions.MinX))
{
chartOptions.Errors.Add("Нечисловое значение в поле дипазона \"min X\"");
}
if (!float.TryParse(maxX, out chartOptions.MaxX))
{
chartOptions.Errors.Add("Нечисловое значение в поле дипазона \"max X\"");
}
if (!float.TryParse(minY, out chartOptions.MinY))
{
chartOptions.Errors.Add("Нечисловое значение в поле дипазона \"min Y\"");
}
if (!float.TryParse(maxY, out chartOptions.MaxY))
{
chartOptions.Errors.Add("Нечисловое значение в поле дипазона \"max Y\"");
}
if (chartOptions.Errors.Count != 0)
{
return(chartOptions);
}
if (chartOptions.MinX > 1000 || chartOptions.MinX < -1000)
{
chartOptions.Errors.Add("Значение в поле \"min X\" находится за пределами допустимого диапазона [-1000..1000]");
}
if (chartOptions.MaxX > 1000 || chartOptions.MaxX < -1000)
{
chartOptions.Errors.Add("Значение в поле \"max X\" находится за пределами допустимого диапазона [-1000..1000]");
}
if (chartOptions.MinY > 1000 || chartOptions.MinY < -1000)
{
chartOptions.Errors.Add("Значение в поле \"min Y\" находится за пределами допустимого диапазона [-1000..1000]");
}
if (chartOptions.MaxY > 1000 || chartOptions.MaxY < -1000)
{
chartOptions.Errors.Add("Значение в поле \"max Y\" находится за пределами допустимого диапазона [-1000..1000]");
}
if (chartOptions.MinX == chartOptions.MaxX)
{
chartOptions.Errors.Add("\"min X\" и \"max X\" не могут быть равными");
}
if (chartOptions.MinY == chartOptions.MaxY)
{
chartOptions.Errors.Add("\"min Y\" и \"max Y\" не могут быть равными");
}
if (chartOptions.Errors.Count != 0)
{
return(chartOptions);
}
if (chartOptions.MinX > chartOptions.MaxX)
{
SwapFloats(ref chartOptions.MinX, ref chartOptions.MaxX);
}
if (chartOptions.MinY > chartOptions.MaxY)
{
SwapFloats(ref chartOptions.MinY, ref chartOptions.MaxY);
}
double lx = chartOptions.MaxX - chartOptions.MinX;
double ly = chartOptions.MaxY - chartOptions.MinY;
double dxy = lx / ly;
if (dxy < 50.0 / 800 || dxy > 800 / 50.0)
{
chartOptions.Errors.Add("Соотношение диапазонов вывода не может быть больше 16");
return(chartOptions);
}
if (lx > ly)
{
chartOptions.SizeX = 800; chartOptions.SizeY = (int)Math.Round(800 * ly / lx);
}
else
{
chartOptions.SizeY = 800; chartOptions.SizeX = (int)Math.Round(800 * lx / ly);
}
return(chartOptions);
}
private static float GetRealY(ChartOptions me, float y)
{
return((me.MaxY - y) * me.SizeY / (me.MaxY - me.MinY));
}
private static float GetRealX(ChartOptions me, int x)
{
return(me.MinX + (me.MaxX - me.MinX) * x / me.SizeX);
}
public static Bitmap GetChartImage(ChartOptions chartOptions, MathFunction f)
{
List <List <PointF> > allFragments = CalculateChartGraph(chartOptions, f);
return(DrawImage(chartOptions, allFragments));
}