Easy Canvas - MetaTrader 5 Library | Forex Indicator Download - MT4/MT5 Resources

Below is an example of a simple indicator using this library.

In this example, the indicator body does not have the functionality to handle the OnChartEvent event. But it may exist.

# Property indicator chart window
#include <canvas\iCanvas.mqh> integer initialization ()
  {
event set millisecond timer ( 33 );
ChartSetInteger ( 0 , ChartShow , True );
Chart set integer ( 0 , CHART_CROSSHAIR_TOOL , wrong ); // Turn off crosshair return ( initialization successful );
  } blank solution init ( const integer reason) { if (reason < 2 ) { chartset integer ( 0 , CHART_CROSSHAIR_TOOL , True ); chart redraw (); }} blank timer ()
  {
Rest integer X= 0 ;
Rest integer Y = 0 ;
if (X!=W.MouseX || Y!=W.MouseY)
    {
      canvas.erase( 0 );
// Draw a fuzzy point for ( integer ix=- 20 ; ix<= 20 ; nine++) for ( integer iy=- 20 ; iy<= 20 ; iy++)
        {
Double p= square root (ix*ix+iy*iy)/ 20.0 ;
if (p> 1 ) p= 1 ;
Uchar P=( Uchar ) round (( 1.0 -p)* 255.0 );
        Canvas.PixelSet(W.MouseX+ix,W.MouseY+iy,ARGB(P, 100 , 0 , 200 ));
        }
//Display information block integer Y1=( integer )Canvas.Y( canvas.Close (W.MouseX));
      Canvas.FillRectangle(W.MouseX,Y1,W.MouseX+ 140 ,Y1+ 67 , 0xA0808080 );
      canvas. Text output (W.MouseX+ 5 ,Y1+ 2 , "off=" + double to string ( canvas.off (W.MouseX), _number ), 0xFFFFFFFF );
      canvas. Text output (W.MouseX+ 5 , Y1+ 18 , "bar=" + double-precision conversion to string (W.MouseBar, 2 ), 0xFFFFFFFF );
      canvas. Text output (W.MouseX+ 5 , Y1+ 34 , string time (W.MouseTime, TIME_DATE | TIME_SECONDS ), 0xFFFFFFFF );
      canvas. Text output (W.MouseX+ 5 ,Y1+ 50 , "Subwindow=" + string (W.MouseSubWin), 0xFFFFFFFF );
// Crosshair Canvas.LineHorizontal( 0 ,W.Width- 1 ,W.MouseY,~W.Color);
      Canvas.LineVertical(W.MouseX, 0 ,W.Height- 1 ,~W.Color);
Integer Ym=(W.MouseY> 16 )?(W.MouseY- 16 ):(W.MouseY+ 2 );
Integer Xm=(W.MouseX<(W.width- 140 ))?(W.MouseX+ 4 ):(W.MouseX- 125 );
      canvas. Text Output (W. Width - 76>, um, double to string (W.MousePrice, _Number ),~W.Color); Canvas. text output ( }​​​​​​​​​​​​

Library features:

Window structure:

structure window {
Unit Color; // Window background color integer Width; // Window width integer Height; // Window height integer Left column; // The number of the leftmost column in the window doubles the right column; // The number of the rightmost column in the window doubles the total number of bars; // The maximum number of bars in the window integer Wind Bar; // The number of visible bars in the window doubles Y_min; // The minimum value of the price in the window doubles Y_max; // The maximum value of the price in the window is doubled dy_pix; // The price change of one pixel is integer dx_pixel ; // Change the number of bars of each pixel integer Mouse The integer Windows total of the sub-window number where the mouse pointer is located ; // The total number of sub-windows, including the main window integer Sub-window; // The current sub-window date and time Time []; // The opening time array of all visible bars in the window };

 class canvas: peoplecanvas { private :
datetime T[ 1 ];
doublePu [ 1 ];
Boolean value FullWinCanvW; // Use a full window canvas by width Boolean value FullWinCanvH; // Use a full window canvas by height
people :
                    iCanvas ( integer​​​​​​​​​​​
                    ~iCanvas() { destroy();};
Double X ( double the bar);
Double X ( DateTimeTime ) { return​​
Double Y( double price) { return ((W.Y_max-price)/W.dy_pix); };
double bar( integer x) { return (( double )W.Left_bar+ 1 -( double )x/( double )W.dx_pix);};
DateTime TimePosition ( integer​​​​​​​​​​span>)B));}; double closed ( integer _symbol , _period , integer ( bar (x)) , 1 , Pr); return Pu [0 ] ;}; double low (integer Use full - window canvas Boolean value FullWinCanvHeight ( ) { return FullWinCanvH ; } ; // Use full - window canvas by height ENUM_PROGRAM_TYPE program type ; } ;

Attachment download

📎 test_icanvas.mq5 (6.64 KB)

📎 icanvas.mqh (31.88 KB)

Source: MQL5 #22164