一、键盘实现切换K周期原理
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首先,需要定义一组按键对于一组K线周期,按下1代表M1,按下2代表M5,以此类推。
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接下来,需要编写一个函数来处理键盘快捷键的事件。可以使用OnChartEvent()函数来监听键盘事件。当按下指定的快捷键时,触发相应的事件处理函数。
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在事件处理函数中,根据按下的快捷键来切换周期。可以使用ChartSetSymbolPeriod()函数来设置图表的周期。例如,当按下快捷键1时,切换到1分钟周期
二、键盘切换K线周期的代码实现
//+------------------------------------------------------------------+
//| 键盘快速切换K线周期.mq4 |
//| Copyright 2022, MetaQuotes Software Corp. |
//| https://www.mql5.com |
//+------------------------------------------------------------------+
#property copyright "VX: mtquant"
#property link "https://www.mql5.com"
#property version "1.00"
#property strict
#property indicator_chart_window
#property description "1=m1, 2=m5, 3=m15, 4=m30, 5=h1, 6=h4, 7=d1, 8=w1, 9=mn ."
//+------------------------------------------------------------------+
//| Custom indicator initialization function |
//+------------------------------------------------------------------+
int OnInit()
{
return (INIT_SUCCEEDED);
}
//+------------------------------------------------------------------+
//| Custom indicator iteration function |
//+------------------------------------------------------------------+
int OnCalculate(const int rates_total,
const int prev_calculated,
const datetime &time[],
const double &open[],
const double &high[],
const double &low[],
const double &close[],
const long &tick_volume[],
const long &volume[],
const int &spread[])
{
return(rates_total);
}
//+------------------------------------------------------------------+
//| ChartEvent function |
//+------------------------------------------------------------------+
void OnChartEvent(const int id, const long &lparam, const double &dparam, const string &sparam)
{
//---
if (id == CHARTEVENT_KEYDOWN)
{
// 使用此网站查找键盘码
// https://keycode.info
switch (int(lparam))
{
case 49: // 数字键 1
ChartSetSymbolPeriod(0,NULL,PERIOD_M1);
break;
case 50: // 数字键 2
ChartSetSymbolPeriod(0,NULL,PERIOD_M5);
break;
case 51: // 数字键 3
ChartSetSymbolPeriod(0,NULL,PERIOD_M15);
break;
case 52: // 数字键 4
ChartSetSymbolPeriod(0,NULL,PERIOD_M30);
break;
case 53: // 数字键 5
ChartSetSymbolPeriod(0,NULL,PERIOD_H1);
break;
case 54: // 数字键 6
ChartSetSymbolPeriod(0,NULL,PERIOD_H4);
break;
case 55: // 数字键 7
ChartSetSymbolPeriod(0,NULL,PERIOD_D1);
break;
case 56: // 数字键 8
ChartSetSymbolPeriod(0,NULL,PERIOD_W1);
break;
case 57: // 数字键 9
ChartSetSymbolPeriod(0,NULL,PERIOD_MN1);
break;
}
//
ChartRedraw();
}
}