125 lines
4.7 KiB
Markdown
125 lines
4.7 KiB
Markdown
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# PlotIndexGetInteger
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The function sets the value of the corresponding property of the corresponding indicator line. The indicator property must be of the int, color, bool or char type. There are 2 variants of the function.
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Call indicating identifier of the property.
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```
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int PlotIndexGetInteger(
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int plot_index, // plotting style index
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int prop_id, // property identifier
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);
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```
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Call indicating the identifier and modifier of the property.
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```
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int PlotIndexGetInteger(
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int plot_index, // plotting index
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int prop_id, // property identifier
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int prop_modifier // property modifier
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)
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```
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Parameters
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plot_index
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[in] Index of the [graphical plotting](/en/docs/constants/indicatorconstants/drawstyles#enum_draw_type)
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prop_id
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[in] The value can be one of the values of the [ENUM_PLOT_PROPERTY_INTEGER](/en/docs/constants/indicatorconstants/drawstyles#enum_plot_property_integer) enumeration.
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prop_modifier
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[in] Modifier of the specified property. Only color index properties require a modifier.
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Note
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Function is designed to extract the settings of drawing of the appropriate indicator line. The function works in tandem with the function [PlotIndexSetInteger](/en/docs/customind/plotindexsetinteger) to copy the drawing properties of one line to another.
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Example: an indicator that colors candles depending on the day of the week. Colors for each day are set in a programmatically.
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```
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#property indicator_separate_window
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#property indicator_buffers 5
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#property indicator_plots 1
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//---- plot ColorCandles
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#property indicator_label1 "ColorCandles"
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#property indicator_type1 DRAW_COLOR_CANDLES
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#property indicator_style1 STYLE_SOLID
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#property indicator_width1 1
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//--- indicator buffers
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double OpenBuffer[];
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double HighBuffer[];
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double LowBuffer[];
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double CloseBuffer[];
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double ColorCandlesColors[];
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color ColorOfDay[6]={CLR_NONE,clrMediumSlateBlue,
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clrDarkGoldenrod,clrForestGreen,clrBlueViolet,clrRed};
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//+------------------------------------------------------------------+
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//| Custom indicator initialization function |
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//+------------------------------------------------------------------+
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void OnInit()
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{
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//--- indicator buffers mapping
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SetIndexBuffer(0,OpenBuffer,INDICATOR_DATA);
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SetIndexBuffer(1,HighBuffer,INDICATOR_DATA);
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SetIndexBuffer(2,LowBuffer,INDICATOR_DATA);
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SetIndexBuffer(3,CloseBuffer,INDICATOR_DATA);
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SetIndexBuffer(4,ColorCandlesColors,INDICATOR_COLOR_INDEX);
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//--- set number of colors in color buffer
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PlotIndexSetInteger(0,PLOT_COLOR_INDEXES,6);
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//--- set colors for color buffer
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for(int i=1;i<6;i++)
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PlotIndexSetInteger(0,PLOT_LINE_COLOR,i,ColorOfDay[i]);
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//--- set accuracy
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IndicatorSetInteger(INDICATOR_DIGITS,_Digits);
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printf("We have %u colors of days",PlotIndexGetInteger(0,PLOT_COLOR_INDEXES));
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//---
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}
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//+------------------------------------------------------------------+
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//| Custom indicator iteration function |
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//+------------------------------------------------------------------+
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int OnCalculate(const int rates_total,
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const int prev_calculated,
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const datetime &time[],
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const double &open[],
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const double &high[],
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const double &low[],
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const double &close[],
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const long &tick_volume[],
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const long &volume[],
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const int &spread[])
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{
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//---
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int i;
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MqlDateTime t;
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//----
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if(prev_calculated==0) i=0;
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else i=prev_calculated-1;
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//----
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while(i<rates_total)
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{
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OpenBuffer[i]=open[i];
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HighBuffer[i]=high[i];
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LowBuffer[i]=low[i];
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CloseBuffer[i]=close[i];
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//--- set color for every candle
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TimeToStruct(time[i],t);
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ColorCandlesColors[i]=t.day_of_week;
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//---
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i++;
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}
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//--- return value of prev_calculated for next call
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return(rates_total);
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}
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//+------------------------------------------------------------------+
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```
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