MQ4 - keep a box centered on the chart

long  widthChartX = ChartGetInteger(0,CHART_WIDTH_IN_PIXELS,0);

Quoting Georgebaker

Disliked

I want to have some code that calculate it automatic so the box always centered on the chart

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      double width  = ChartWidthInPixels();     //    mine is 1314;
      double height = ChartHeightInPixels();    //    mine is 588;    
 
       int      wth    = (width*690)/1314; 

       int      hgh    = (height*230)/588;
                         
       button("eur"+symbol+i,symbol,60 ,18,wth, hgh,DarkBlue,White);                            // 588 1314

 
     for (j=0;j<6;j++) 
       {
       for (k=0;k<9;k++) 
       {
       clr = eurclrs[i][j][k];
       
       int w = (((k*16)+650+(i*160))*width)      /1314;
       int h = ((250 +(j*17))*height)                  /588;
       
       button("eurichi"+k+symbol+j,k,15,15,w, h,clr,Black);  
       }          
       }

Quoting hayseed

Disliked

{quote} //----- hey george...... i'll have to make some assumptions here on what your doing and how your doing it...... starting with the most difficult and you can probably figure out where to go from there..... the first chart below is a single large multi-dimensional ea plotting objects, colors, and text using the common button function with x and y coordinates..... the second chart is the same function on a single pair centered.... the third chart is that same single pair graphics where the chart size in pixels has been reduced and the graphics...

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Quoting Georgebaker

Disliked

How can your graphics centered be x = 690 when your width is1314 and half of that is 657? The center will always be in the middle so 1314/2 would be the center right?

Ignored

Quoting hayseed

Disliked

{quote} //---- your math is correct..... however your starting point might be something other than 657...... an exact (x,y) pixel might found that is the center of the chart.... and if your goal was to place a single period, " . ", there those x,y coordinates might be used..... in my case they might be (657,294)..... suppose to wanted place, "..........." , or "___________", or "-----------" or a rectangle, if you start at the center (657,294) point the graphics will not be centered.... you must adjust your starting point 1/2 the objects width to...

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