48 lines
1.6 KiB
MQL5
48 lines
1.6 KiB
MQL5
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//+------------------------------------------------------------------+
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//| FuncCallback.mq5 |
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//| Copyright 2021, MetaQuotes Ltd. |
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//| https://www.mql5.com |
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//+------------------------------------------------------------------+
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#property copyright "Copyright 2021, MetaQuotes Ltd."
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#property link "https://www.mql5.com"
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#property version "1.00"
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typedef void (*ProgressCallback)(const float percent);
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//+------------------------------------------------------------------+
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//| Heavy computations demo |
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//+------------------------------------------------------------------+
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void DoMath(double &bigdata[], ProgressCallback callback)
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{
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const int N = 1000000;
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for(int i = 0; i < N; ++i)
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{
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if(i % 10000 == 0 && callback != NULL)
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{
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callback(i * 100.0f / N);
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}
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// ... lot of calculations
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}
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}
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//+------------------------------------------------------------------+
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//| Callback for progress indication |
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//+------------------------------------------------------------------+
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void MyCallback(const float percent)
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{
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Print(percent);
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}
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//+------------------------------------------------------------------+
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//| Script program start function |
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//+------------------------------------------------------------------+
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void OnStart()
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{
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double data[] = {0};
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DoMath(data, MyCallback);
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}
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//+------------------------------------------------------------------+
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