AutoBringChartToTop.mq4

<codec cpp> +——————————————————————+ | AutoBringChartToTop.mq4| | Copyright 2013, MetaQuotes Software Corp. | | http://www.mql5.com | +——————————————————————+ 2017-05-25 12:42:27 publish to MQL5.COM codebase 2016-02-18 14:51:31 add input ENUMBASECORNER Corner=3; / Note: https://www.mql5.com/en/docs/constants/objectconstants/enum_anchorpoint The OBJBUTTON, OBJRECTANGLELABEL and OBJEDIT objects have a fixed anchor point in the upper left corner (ANCHORLEFTUPPER). / 2014-5-1 22:07 coded

— input parameters input ENUMBASECORNER Corner = 3; input int ShiftX = 5; input int ShiftY = 15; input int IntervalSeconds = 3; CChartObjectButton ExtBtn; object to create button string btnName = “fmtbtnAlt_show”; button name long chartToTop = -1, nextChart = -1; chartID to bringh it top, next ChartID to bring to top +——————————————————————+ | Custom indicator initialization function | +——————————————————————+ int OnInit() { —

— create button int width = 100, height = 30; width and height of button

  if(!ButtonCreate(ExtBtn, btnName, ShiftX, ShiftY, width, height, Corner)) {
      Alert("Create buttons failed!");
      return(INIT_FAILED);
  }
  ExtBtn.SetString(OBJPROP_TEXT, "OFF"); // init button text to OFF

—set timer if(!EventSetTimer(IntervalSeconds)) return(INITFAILED); — return(INITSUCCEEDED); } +——————————————————————+ | | +——————————————————————+ void OnDeinit(const int reason) { EventKillTimer(); ObjectDelete(0, btnName); } +——————————————————————+ | Custom indicator iteration function | +——————————————————————+ int OnCalculate(const int ratestotal, const int prevcalculated, const datetime &time[], const double &open[], const double &high[], const double &low[], const double &close[], const long &tickvolume[], const long &volume[], const int &spread[]) { — — return value of prevcalculated for next call return(ratestotal); } +——————————————————————+ | Timer function | +——————————————————————+ void OnTimer() { — if(chartToTop > 0) { or if(ExtBtn.GetString(OBJPROPTEXT)==“ON”) ChartSetInteger(chartToTop, CHARTBRINGTO_TOP, true); nextChart = ChartNext(chartToTop); if nextChart==-1,chartToTop=ChartFirst();

      chartToTop = nextChart;
      if(chartToTop == -1)chartToTop = ChartFirst();

  }

} +——————————————————————+ | ChartEvent function | +——————————————————————+ void OnChartEvent(const int id, const long &lparam, const double &dparam, const string &sparam) { — click button to switch ON/OFF

  if(id == CHARTEVENT_OBJECT_CLICK) {
      if(sparam == btnName) { //button is clicked
          if(chartToTop == -1) { // or if(ExtBtn.GetString(OBJPROP_TEXT)=="OFF")
              ExtBtn.SetString(OBJPROP_TEXT, "ON"); //set the current state to ON
              ExtBtn.BackColor(clrYellowGreen);
              ExtBtn.BorderColor(clrYellowGreen);
              chartToTop = ChartFirst(); //work from the first chart.
          } else { //switch to OFF
              ExtBtn.SetString(OBJPROP_TEXT, "OFF"); //set the current state to OFF
              ExtBtn.BackColor(clrTomato);
              ExtBtn.BorderColor(clrTomato);
              chartToTop = -1; // stop
          }
      }
  }

} +——————————————————————+ bool ButtonCreate(CChartObjectButton &btn, const string name, const int x, const int y, int width, int height, ENUMBASECORNER corner = CORNERRIGHTLOWER) { —button coordinate, relative to the corner of chart

  int pointX = 0, pointY = 0; //Exactly,it is the coordinate of the button's LEFT_UPPER

—Note:when create buttons,the anchor point is always the button's LEFTUPPER —It means we should use the coordinate of the LEFTUPPER point to create button. —So,calculte the coordinate of the LEFT_UPPER point (anchor point) /* this code is ok in MQL4,but it is not correct in MQL5. if(corner==0){ pointX=x; pointY=y;} corner=0,button is at the left upper of chart if(corner==1){ pointX= x+width; pointY = y;} 1 if(corner==2){ pointX = x; pointY = height+y;}2 if(corner==3){ pointX=x+width; pointY=y+height;}3 */ if(corner == CORNERLEFTUPPER) { pointX = x; corner=0,button is at the left upper of chart pointY = y; } if(corner == CORNERRIGHTUPPER) { pointX = x + width; 1 pointY = y; } if(corner == CORNERLEFTLOWER) { pointX = x; 2 pointY = height + y; } if(corner == CORNERRIGHT_LOWER) { pointX = x + width; 3 pointY = y + height; } —Create button if(!btn.Create(0, name, 0, pointX, pointY, width, height)) return(false); if(!btn.Corner(corner)) return(false); if(!btn.FontSize(10)) return(false); if(!btn.Color(clrWhite)) return(false);OBJPROPCOLOR: the color of text on button if(!btn.BackColor(clrTomato)) return(false);OBJPROPBGCOLOR if(!btn.BorderColor(clrTomato)) return(false);OBJPROPBORDERCOLOR,same as backcolor to make button flat. if(!btn.SetInteger(OBJPROPHIDDEN, true))return(false); if(!btn.SetInteger(OBJPROPSELECTABLE, false))return(false); — successful execution return(true); } +——————————————————————+ </code>