76 lines
1.8 KiB
Markdown
76 lines
1.8 KiB
Markdown
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# SetDouble
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Provides simplified access to the functions of API MQL5 [ObjectSetDouble()](/en/docs/objects/objectsetdouble) to change double properties (of float and double types) of a graphical object bound to a class instance. There are two versions of a function call:
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Setting a property value that does not require a modifier
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```
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bool SetDouble(
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ENUM_OBJECT_PROPERTY_DOUBLE prop_id, // double property ID
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double value // value
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)
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```
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Parameters
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prop_id
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[in] ID of a graphical object double property.
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value
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[in] New value of a changed double property.
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Setting a property value indicating the modifier
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```
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bool SetDouble(
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ENUM_OBJECT_PROPERTY_DOUBLE prop_id, // double property ID
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int modifier, // modifier
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double value // value
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)
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```
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Parameters
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prop_id
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[in] ID of a graphical object double property.
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modifier
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[in] Modifier (index) of a double property.
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value
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[in] New value of a changed double property.
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Return Value
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true - success, false - cannot change the double feature.
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Example:
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```
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//--- example for CChartObject::SetDouble
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#include <ChartObjects\ChartObject.mqh>
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//---
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void OnStart()
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{
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CChartObject object;
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//---
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for(int i=0;i<object.LevelsCount();i++)
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{
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//--- set level value of chart object
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if(!object.SetDouble(OBJPROP_LEVELVALUE,i,0.1*i))
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{
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printf("Set double property error %d",GetLastError());
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return;
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}
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}
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}
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```
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