CChartCanvas

Base class for implementing classes, which are used for drawing charts and their elements.

Description

This class includes methods for working with the basic elements of any chart: coordinate axes and their marks, chart legend, grid, background, etc. Here you can customize the options for displaying elements: visibility, text color, etc.

Declaration

class CChartCanvas : public CCanvas

Title

#include <Canvas\Charts\ChartCanvas.mqh>

Inheritance hierarchy

CCanvas

CChartCanvas

Direct descendants

: CHistogramChart, CLineChart, CPieChart

Class methods

Method	Action
ColorBackground	Returns and sets the background color.
ColorBorder	Returns and sets the border color.
ColorText	Returns and sets the text color.
ColorGrid	Returns and sets the grid color.
MaxData	Returns and sets the maximum amount of data (series) allowed.
MaxDescrLen	Returns and sets the maximum length of the descriptors.
ShowFlags	Returns and sets the visibility flag of the chart elements.
IsShowLegend	Returns and sets the visibility flag of the legend on the chart.
IsShowScaleLeft	Returns the visibility flag of the scale of values on the left.
IsShowScaleRight	Returns the visibility flag of the scale of values on the right.
IsShowScaleTop	Returns the visibility flag of the scale of values at the top.
IsShowScaleBottom	Returns the visibility flag of the scale of values at the bottom.
IsShowGrid	Returns the visibility flag of the grid on the chart.
IsShowDescriptors	Returns the visibility flag of the descriptors on the chart.
IsShowPercent	Returns the visibility flag of the percentages on the chart.
VScaleMin	Returns and sets the minimum on the vertical scale of values.
VScaleMax	Returns and sets the maximum on the vertical scale of values.
NumGrid	Returns and sets the number of vertical scale divisions when plotting the chart grid.
DataOffset	Returns and sets the data offset value.
DataTotal	Returns the total number of data series on the chart.
DrawDescriptors	Virtual method for drawing descriptors.
DrawData	Virtual method for drawing data series at the specified index.
Create	Virtual method that creates a graphical resource.
AllowedShowFlags	Sets the set of allowed visibility flags for chart elements.
ShowLegend	Sets the visibility flag for the legend.
ShowScaleLeft	Sets the visibility flag for the left scale.
ShowScaleRight	Sets the visibility flag for the right scale.
ShowScaleTop	Sets the visibility flag for the top scale.
ShowScaleBottom	Sets the visibility flag for the bottom scale.
ShowGrid	Sets the visibility flag for the grid.
ShowDescriptors	Sets the visibility flag for the descriptors.
ShowValue	Sets the visibility flag for the values.
ShowPercent	Sets the visibility flag for the percentages.
LegendAlignment	Sets the text alignment for the legend.
Accumulative	Sets the value accumulation flag for the series.
VScaleParams	Sets the parameters for the vertical scale of values.
DescriptorUpdate	Updates the value of the series descriptor (at the specified position).
ColorUpdate	Updates the series colors (at the specified position).
ValuesCheck	Performs internal calculations for plotting the chart.
Redraw	Redraw the chart.
DrawBackground	Draws the background.
DrawLegend	Redraws the legend.
DrawLegendVertical	Draws a vertical legend.
DrawLegendHorizontal	Draws a horizontal legend.
CalcScales	Calculates the coordinates of the scale.
DrawScales	Redraws all scales of values.
DrawScaleLeft	Redraws the left scale of values.
DrawScaleRight	Redraws the right scale of values.
DrawScaleTop	Redraws the top scale of values
DrawScaleBottom	Redraws the bottom value scale.
DrawGrid	Redraw the chart.
DrawChart	Redraw the chart.

Methods inherited from class CCanvas

: CreateBitmap, CreateBitmap, CreateBitmapLabel, CreateBitmapLabel, Attach, Attach, Destroy, ChartObjectName, ResourceName, Width, Height, Update, Resize, Erase, PixelGet, PixelSet, LineVertical, LineHorizontal, Line, Polyline, Polygon, Rectangle, Triangle, Circle, Ellipse, Arc, Arc, Arc, Pie, Pie, FillRectangle, FillTriangle, FillPolygon, FillCircle, FillEllipse, Fill, Fill, PixelSetAA, LineAA, PolylineAA, PolygonAA, TriangleAA, CircleAA, EllipseAA, LineWu, PolylineWu, PolygonWu, TriangleWu, CircleWu, EllipseWu, LineThickVertical, LineThickHorizontal, LineThick, PolylineThick, PolygonThick, PolylineSmooth, PolygonSmooth, FontSet, FontNameSet, FontSizeSet, FontFlagsSet, FontAngleSet, FontGet, FontNameGet, FontSizeGet, FontFlagsGet, FontAngleGet, TextOut, TextWidth, TextHeight, TextSize, GetDefaultColor, TransparentLevelSet, LoadFromFile, LineStyleGet, LineStyleSet

Last updated on 2026-07-24