Libraries: Easy Canvas - page 2

[Nikolai Semko]

MT4 version here

[Nikolai Semko]

Version 1.16: fixed some bugs and accelerated some functions.

[Nikolai Semko]

Version 1.21: fixed some bugs

[Oleksii Chepurnyi]

Good afternoon.

Should I add it? Because it doesn't remember )

void ChartChanged()
  {
   static int preWinTotal=W.WindowsTotal;
   if(W.Y_max==0 && CheckPointer(Canvas)!=POINTER_INVALID) {delete Canvas; Canvas=new iCanvas;}
   GetWindowProperties(W);
   if (preWinTotal!=W.WindowsTotal) for (int i=ArraySize(iC)-1; i>=0; i--) if(CheckPointer(iC[i])!=POINTER_INVALID) if (iC[i].SubWin>=W.WindowsTotal) iC[i].SubWin--;
   for (int i=ArraySize(iC)-1; i>=0; i--)
     {
      if(CheckPointer(iC[i])!=POINTER_INVALID)
         if(iC[i].FullWinCanvWidth())
           {
            if(iC[i].FullWinCanvHeight()) {if(W.Width!=WidOld || W.height[iC[i].SubWin]!=HeiOld[iC[i].SubWin] ) iC[i].Resize(W.Width,W.height[iC[i].SubWin]);}
            else {if(W.Width!=WidOld) iC[i].Resize(W.Width,iC[i].Height());}
           }
      else { if(iC[i].FullWinCanvHeight()) if(W.height[iC[i].SubWin]!=HeiOld[iC[i].SubWin]) {iC[i].Resize(iC[i].Width(),W.height[iC[i].SubWin]); HeiOld[iC[i].SubWin]=W.height[iC[i].SubWin];}}
      else ArrayRemove(iC,i,1);
     }
   WidOld=W.Width; 
   for(int i=ArraySize(iC)-1; i>=0; i--)        HeiOld[iC[i].SubWin] = W.height[iC[i].SubWin];
   preWinTotal=W.WindowsTotal;
   XYToTimePrice(0,0,W.MouseTime,W.MousePrice,CHARTEVENT_CHART_CHANGE);
  }

[Nikolai Semko]

Oleksii Chepurnyi:

Good afternoon.

Shall I add it? Because it doesn't remember )

Thanks!
Fixed in KB.
Please check your code. I fixed it without checking. Maybe I didn't take into account something.

void ChartChanged()
  {
   static int preWinTotal=W.WindowsTotal;
   if(W.Y_max==0 && CheckPointer(Canvas)!=POINTER_INVALID) {delete Canvas; Canvas=new iCanvas;}
   GetWindowProperties(W);
   if(preWinTotal!=W.WindowsTotal) for(int i=ArraySize(iC)-1; i>=0; i--) if(CheckPointer(iC[i])!=POINTER_INVALID) if(iC[i].SubWin>=W.WindowsTotal) iC[i].SubWin--;
   for(int i=ArraySize(iC)-1; i>=0; i--)
     {
      if(CheckPointer(iC[i])!=POINTER_INVALID)
         if(iC[i].FullWinCanvWidth())
           {
            if(iC[i].FullWinCanvHeight())
              {
               if(W.Width!=WidOld || W.height[iC[i].SubWin]!=HeiOld[iC[i].SubWin]) iC[i].Resize(W.Width,W.height[iC[i].SubWin]);
              }
            else {if(W.Width!=WidOld) iC[i].Resize(W.Width,iC[i].Height()); }
           }
      else
        {
         if(iC[i].FullWinCanvHeight())
            if(W.height[iC[i].SubWin]!=HeiOld[iC[i].SubWin]) iC[i].Resize(iC[i].Width(),W.height[iC[i].SubWin]);
        }
      else ArrayRemove(iC,i,1);
      HeiOld[iC[i].SubWin]=W.height[iC[i].SubWin];
     }
   WidOld=W.Width;
   preWinTotal=W.WindowsTotal;
   XYToTimePrice(0,0,W.MouseTime,W.MousePrice,CHARTEVENT_CHART_CHANGE);
  }

[Oleksii Chepurnyi]

Nikolai Semko:

Thanks!
Fixed in KB.
Please check your code. I fixed it without checking. Maybe I didn't take into account something.

Now everything is OK )

I wanted to ask, what is the purpose of adding the iC array?

[Nikolai Semko]

Oleksii Chepurnyi:

It's OK now )

I wanted to ask, what is the purpose of adding the iC array?

It is done to control a set of subwindows and a set of iCanvas instances. After all, windows can be added and removed in the process of the indicator work.
For example, for this indicator it is necessary:

https://www.mql5.com/en/code/25414

[Artyom Trishkin]

Nikolai Semko:

This is done to control multiple subwindows and multiple instances of iCanvas. After all, windows can be added and removed in the process of the indicator work.
For example, it is necessary for this indicator:

https://www.mql5.com/en/code/25414

Corrected the link - it led to the profile, but it is closed for everyone there.

[Nikolai Semko]

Artyom Trishkin:
Corrected the link - it was leading to the profile and it's closed to everyone there.

Thanks)))

[Nikolai Semko]

Version 1.24: fixed some bugs.