89 lines
2.8 KiB
Markdown
89 lines
2.8 KiB
Markdown
# ValuesFunctionFormat (Get method)
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Get the pointer to the function defining the format of displaying values on the axis.
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```
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DoubleToStringFunction ValuesFunctionFormat()
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```
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Return Value
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Pointer to the function defining the format of displaying values on the axis.
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# ValuesFunctionFormat (Set method)
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Set the pointer to the function defining the format of displaying values on the axis.
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```
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void ValuesFunctionFormat(
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DoubleToStringFunction func // function for converting numerical values into a string
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)
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```
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Parameters
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func
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[in] Custom function for converting numerical values into a string.
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Example:
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The format of displaying X axis values has been changed using the following code:
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```
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//+------------------------------------------------------------------+
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//| DateAxisGraphic.mq5 |
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//| Copyright 2016, MetaQuotes Software Corp. |
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//| https://www.mql5.com |
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//+------------------------------------------------------------------+
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#include <Graphics\Graphic.mqh>
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//--- array for store values
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double arrX[];
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double arrY[];
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//+------------------------------------------------------------------+
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//| Custom function for create values on X-axis |
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//+------------------------------------------------------------------+
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string TimeFormat(double x,void *cbdata)
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{
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return(TimeToString((datetime)arrX[ArraySize(arrX)-(int)x-1]));
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}
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//+------------------------------------------------------------------+
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void OnStart()
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{
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MqlRates rates[];
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CopyRates(Symbol(),Period(),0,100,rates);
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ArraySetAsSeries(rates,true);
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int size=ArraySize(rates);
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ArrayResize(arrX,size);
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ArrayResize(arrY,size);
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for(int i=0; i<size;++i)
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{
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arrX[i]=(double)rates[i].time;
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arrY[i]=rates[i].close;
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}
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//--- create graphic
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CGraphic graphic;
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if(!graphic.Create(0,"DateAxisGraphic",0,30,30,780,380))
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{
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graphic.Attach(0,"DateAxisGraphic");
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}
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//--- create curve
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CCurve *curve=graphic.CurveAdd(arrY,CURVE_LINES);
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//--- gets the X-axis
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CAxis *xAxis=graphic.XAxis();
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//--- sets the X-axis properties
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xAxis.AutoScale(false);
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xAxis.Type(AXIS_TYPE_CUSTOM);
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xAxis.ValuesFunctionFormat(TimeFormat);
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xAxis.DefaultStep(20.0);
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//--- plot
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graphic.CurvePlotAll();
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graphic.Update();
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}
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```
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