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**John Kevin** · 8 May 2019, 06:59 PM

Hello Toragan,

The Magic Event and Magic Code description are described in the application note that you have mentioned:
ViSi-Genie How to Add Magic Objects
ViSi-Genie Magic Code Insertion Points

Magic Event

Events are usually triggered when input objects such as winbutton objects on the display are pressed.
In the Genie environment of the standard Workshop IDE, the OnChanged event property of a winbutton, for example,
can be configured to toggle the state of a LED object.

In Workshop Pro, it is now possible for the user to create a custom event, through 4DGL coding, in
the form of a Magic Event object. For instance, a winbutton, when pressed,
can make a LED object blink ten times.

Supporting Application Notes and Examples are also provided:
1.) ViSi-Genie Magic Slide to Unlock
2.) ViSi-Genie Magic Main Loop Counter
3.) ViSi-Genie Magic Button Counters

Magic Event is used when you want to invoke a response from an input 'widget' (e.g button). As explained above, you can make the
LED blink ten times or you can also print something on the display. Either way, this function is active only when called.

Magic Code

A Magic Code object allows the user to insert custom 4DGL code into specific locations inside the Genie project.
For example, a counter variable can be declared and initialized in a Magic Code object inserted to the location
“Constant/Global/Data”. This variable can then be accessed and used by another Magic Code object inserted at the location “MainLoop”.

Supporting Application Notes and Examples are also provided:
1.) ViSi-Genie Magic Main Loop Counter
2.) ViSi-Genie Magic Keyboard Edit

Magic code has 6 insertion points. It would be best to look at this picture to further understand its structure.
You can try to print something on each point to see where your code is running in the program.

I have attached a simple program using Magic Events and Magic Code. I hope this helps.

Best Regards,
Kevin

**Toragan** · 9 May 2019, 08:01 PM

Hi Kevin,

I better understanding now.

But I still have a problem with something I can't understand.

Fatal Error : Functions can't be nested (line 31 column 1 file:MagicCode3.inc)

1 - I don't understand why she can't be nested. Maybe I did something wrong, I'll try to find an issue and EDIT the post if it's done.
2 - When I'd like to insert more items (red lines), my project crash but the items size seems be enough.

MagicCode3.inc (Constant/Global/Data)

Code:

// font to use for listbox
//#constant font     -1           // select -1 to use usd font file "font.gci" and "font.dat"
#constant font     FONT3       // otherwise use 'standard' font
#constant fontMulH 2            // font height multiplier
#constant fontMulW 1            // font width multiplier
#constant largelist             // uncomment to define a large list to show 'slowdown'

// constants for demo part (and implementation, depending if fixed size is used)
var items[1000] ;           // string to contain entries, could be mem_alloc'd

// constants for listbox
#constant maxent    100     // maximum number of entries in list
#constant seljitter 3       // amount of y pixels that touch can move before it is considered a move and not a touch
#constant selbgcol  BLUE    // selected background colour
#constant normbgcol WHITE   // un-selected background colour
#constant selfgcol  WHITE   // selected foreground colour
#constant normfgcol GRAY    // un-selected foreground colour
#constant ygap      1       // space between entries, larger font is a better idea
#constant boxcolour BLACK   // colour of the listbox
#constant insidespace 5     // blank space inside listbox (+1)
#constant boxwidth 2        // only 1 or 2 supported, see code

const var itempos[maxent] ;       // string pointer to each entry
var itemsel ;               // selected item, -1 means nothing selected
var itemcnt ;               // number of items
var itemmaxh ;              // height of each item
var itemsw ;                // number of items in window
var postop ;                // top position in window (pixels)
var vptop, vpleft, vpright ; // writeable area within listboxfunc printitems()
    var i, j, bgc ;
    gfx_Clipping(ON) ;
    gfx_MoveTo(vpleft,vptop+postop) ;
    for(i:=0; i&lt;itemcnt; i++)
        if (itemsel == i)
            txt_FGcolour(selfgcol) ;
            bgc := selbgcol ;
        else
            txt_FGcolour(normfgcol);
            bgc := normbgcol ;
        endif
        txt_BGcolour(bgc);
        j := itempos[i] ;
        str_Printf(&amp;j, "%s\n") ;
        gfx_RectangleFilled(peekW(GFX_X2), peekW(GFX_Y1), vpright, peekW(GFX_Y1)+itemmaxh, bgc) ;       // fill out to width of listbox
    next
    gfx_RectangleFilled(vpleft, peekW(GFX_Y1)+itemmaxh, vpright, peekW(GFX_Y1)+itemmaxh*2, normbgcol) ; // fill out bottom of screen (only important at end or list)
    gfx_Clipping(OFF) ;
endfunc

func listbox(var ipitems, var font, var top, var left, var bottom, var right)
    var i, p, ogap, ts, tx, ty, topy, vpo, cit, cansel ;
    txt_FontID(font) ;
#IF fontMulH != 1
    txt_Height(fontMulH);
#ENDIF
#IF fontMulH != 1
    txt_Width(fontMulW);
#ENDIF

    itemcnt := 0 ;
    ogap := txt_Ygap(ygap);                 // set text gap, again to help with touchability
    p := str_Ptr(ipitems) ;
    while(str_GetByte(p) != 0)              // find each entry
        itempos[itemcnt++] := p ;           // save pointer intto the string
        p := str_Find(&amp;p, "," );            // find end of required string
        str_PutByte(p++,'\0');              // change ',' to \0 to make individual strings
    wend
    itemsel := -1 ;
    itemmaxh := charheight(str_GetByte(itempos[0])) ;
    gfx_Rectangle(left, top, right, bottom, boxcolour) ;    // draw box to make listbox
#IF boxwidth == 2
    left++ ;
    top++ ;
    bottom-- ;
    right-- ;
    gfx_Rectangle(left, top, right, bottom, boxcolour) ;    // draw box to make listbox
#ENDIF
    vpleft  := left + insidespace ;
    vptop   := top + insidespace ;
    vpright := right - insidespace ;
    bottom -= insidespace ;
    itemsw := (bottom-vptop) / itemmaxh ;
    gfx_ClipWindow(vpleft, vptop, vpright, bottom);           // set the clipping area
    printitems() ;

    touch_Set(TOUCH_ENABLE);
    repeat
        ts := touch_Get(TOUCH_STATUS) ;
        tx := touch_Get(TOUCH_GETX) ;
        ty := touch_Get(TOUCH_GETY) ;
        if (ts == TOUCH_PRESSED)
            if ((tx &gt;= vpleft) &amp;&amp; (tx &lt;= vpright) &amp;&amp; (ty &gt;= vptop) &amp;&amp;  (ty &lt;= bottom))
                vpo := postop ;
                topy := ty ;
                cit := (ty - vptop - postop) / itemmaxh ;
                cansel := 1 ;
            else                                            // break loop if touched
            break ;                                     // better just to ignore and use an 'ok' button
            endif
        else if (ts == TOUCH_RELEASED)
            if (cansel)                                     // select if touch and release within an entry and no moving outside set limits
                itemsel := cit ;
                printitems() ;
            endif
        else if (ts == TOUCH_MOVING)
            postop := vpo - topy + ty ;
            if (postop &gt; 0)                                 // ensure we can't go up beyond top
                postop := 0 ;
            else if (postop &lt; -(itemcnt-itemsw)*itemmaxh)   // or down beyond bottom
                postop := -(itemcnt-itemsw)*itemmaxh ;
            endif
            printitems() ;
            if (ABS(topy-ty) &gt; seljitter) cansel := 0 ;
        endif
    forever
#IF fontMulH != 1
    txt_Height(1);  // reset
#ENDIF
#IF fontMulH != 1
    txt_Width(1);   // reset
#ENDIF
    txt_Ygap(ogap);                         // reset text gap
    txt_FGcolour(normfgcol) ;
    txt_BGcolour(normbgcol) ;
    for(i:=1; i&lt;itemcnt; i++)
        str_PutByte(itempos[i]-1,',');      // change \0 back to ','
    next
    return itemsel ;
endfunc

MagicCode4.inc (PostActiveForm)

Code:

#inherit "MagicCode3.inc"

var check := 0;

if (CurrentForm == 14)
    var count, hFont;
    to(items);
    print("[M12] : SweepMode,[M24] : Macro toto,[M1],[M2] : SweepMode,[M13],[M24] : Macro toto,[M24] : Macro toto,[M24] : SweepRegFreq RegAmpl Stop&amp;Recov,[M24] : Macro toto,[M24] : Macro toto,[M24] : Macro toto,[M24] : Macro toto,[TEST] Verif de list");
#IF EXISTS largelist
    for (count := 0; i &lt; 50; count++)         // test of a huge list
        to(APPEND) ;
        print(",Item ", count+11) ;
    next
#ENDIF
    while(check != 1)
        count := listbox(items, hFont, 70, 10, 230, 310) ;      // (non string) pointer to item list, font to use (could be uSD font), top, left, bottom, right or listbox

        gfx_MoveTo(0, 240) ;
        if (count == -1)
            print("You didn't select anything") ;
        else
            check := 1;
            print("You Selected item ", count, "       ") ;
        endif
//    print([STR] items) ;
    wend
endif

Best Regards,
Toragan

**John Kevin** · 10 May 2019, 12:24 PM

Hello Toragan,

I have checked the code that you posted above and it seems that there are some items you replaced with the original code.

For example this code:

for(i:=0; i<itemcnt; i++)

whereas, it should be

for(i:=0; i<itemcnt; i++)

Comparison Operators ('<' and '>') are replaced by some code for an unknown reason, can you check again at your end if that is the case?

1 - I don't understand why she can't be nested. Maybe I did something wrong, I'll try to find an issue and EDIT the post if it's done.

The error that you are receiving appears when you are inserting another function inside a function

Example

function 1()
function 2()
endfunc
endfunc

However, the error does not spawn in the code above still, you forgot to add the

Code:

func printitems()

in line 31.

2 - When I'd like to insert more items (red lines), my project crash but the items size seems be enough.

Can I ask how are you adding more items? You can use the command:

Code:

to(APPEND) ;
print(",Test 1,Test 2,Test 3");

to insert more items on the array

Attached is a modified version of your code, can you try and see if everything works correctly?
Also, I added some comments please try to read them. Thanks

I hope this helps.

Best regards,
Kevin

Attached Files

Prog.zip (3.7 KB, 2 views)

**Toragan** · 10 May 2019, 05:50 PM

Hi Kevin,

For example this code:

for(i:=0; i<itemcnt; i++)

whereas, it should be

for(i:=0; i<itemcnt; i++)

Comparison Operators ('<' and '>') are replaced by some code for an unknown reason, can you check again at your end if that is the case?

1 - I don't understand why she can't be nested. Maybe I did something wrong, I'll try to find an issue and EDIT the post if it's done.

The error that you are receiving appears when you are inserting another function inside a function

Example

function 1()
function 2()
endfunc
endfunc

However, the error does not spawn in the code above still, you forgot to add the

Code:

func printitems()
in line 31.

I had some problems with the code and I copied a wrong part, sorry.

2 - When I'd like to insert more items (red lines), my project crash but the items size seems be enough.

Can I ask how are you adding more items? You can use the command:

Code:

to(APPEND) ; print(",Test 1,Test 2,Test 3");
to insert more items on the array

Yes it's what I did, I sure the problem comes from the counter in my loop.

But now I have context error, following screenshot of errors.
It's the reasons why I try to fix that, adding "#inherit "MagicCode3.inc"". But he don't know items, listbox.

Click image for larger version Name: Capture.PNG Views: 0 Size: 12.3 KB ID: 68188

And adding #inherit "MagicCode3.inc""

Fatal Error : Functions can't be nested (line 31 column 1 file:MagicCode3.inc)

**John Kevin** · 10 May 2019, 06:26 PM

Hello Toragan,

Did you try to run the program that I have attached? Can you confirm that it is working as intended?

The variable 'items' is declared on global, you should not have any problem accessing it.

Can I ask what is the InsertPoint of your 'MagicCode3'? It should be on the Constant/Global/Data.

Best Regards,
Kevin

**Toragan** · 10 May 2019, 06:36 PM

Hi,

Yes your program work perfectly, I copy and paste on my own but it's tell me Errors.
I'm ok with you, "items" is a global and my file in Constant/Global/Data, it's the reason why i'm stuck.

Best regards,
Toragan

**Toragan** · 10 May 2019, 07:04 PM

This is my project.

The MagicCode3.inc is not implement in the 4DGenieS file, but finally my question is, why ?
Why he's not implement by himself into 4DGenieS file ?

When I'm trying to write #inherit "MagicCode3.inc" in the 4DGenieS file, he's automatically delete after compilation.

**John Kevin** · 14 May 2019, 10:08 AM

Hello Toragan,

Sorry for the delayed response.

Upon looking at your project, I have noticed that you already have a magic code for Constant/Global/Data (MagicCode1).
You do not need to create another magic code for this, you can resolve the issue if you copy and paste your 'MagicCode3' in your 'MagicCode1'.
Let me know if that helps.

Best Regards,
Kevin

**Toragan** · 14 May 2019, 06:27 PM

Hi Kevin,

No problems !

It's working better, however when I sliding the listbox all words are duplicated like the listbox isn't never refresh.
I think about a loop ... It's working very well when I trying on the Form0, but when I'm writing if (CurrentForm == 14) it's happen that.
If I fix it I'll edit the post.

Ps: The problem of the crash of 4DWorkshop still doesn't seem fixed.
I tried to fix by different ways without success.

Best Regards
Thomas

**John Kevin** · 15 May 2019, 06:49 PM

Hello,

I have tried to run your program and it really gets stuck on the sliding list. As of now, I am finding what is
causing the issue. I will get back to you as soon as I have found something relevant.

I noticed that when you run the program through setting the initial form to either '7' or '14' the sliding list works fine.

Best regards,
Kevin

**Toragan** · 15 May 2019, 07:23 PM

Hi,

Thanks you.
I'm also trying to find something, I'll tell you if I have interesting things.

EDIT: I tried with a smaller project, I created 4 forms and put the sliding list in the form3. It works very well ...
I have tried many things to fix that but nothing works, I am really stuck in this problem.
Ps: It works when it's load on the first form, but if you press the screen outside the sliding list, the programme reboot and it's broken again.

Best regards,
Toragan

**John Kevin** · 16 May 2019, 02:53 PM

Hello,

I think I have found what is causing the issue. Upon deleting the 'string' widget on Form8, the sliding list works just fine.

I have attached a modified version of your project for you to test.
I do not have any data inputs, so I commented the initialization for the Modbus to run the whole project.

Also, I added some lines of code on Form14 so you can test the program continuously.

Best Regards,
Kevin

Attached Files

L_NexTgenClassic4DSystem.zip (363.9 KB, 4 views)

**Toragan** · 16 May 2019, 06:40 PM

Hello,

The attached file is exactly what you had run on your screen ?
I tried to delete the "string" widget on Form8 but I have no change.

**John Kevin** · 16 May 2019, 06:54 PM

Hello,

I tried to delete the "string" widget on Form8 but I have no change.

Did you reload the graphics file?

Can you try again this attached file and let me know. Thanks

Best Regards,
Kevin

Attached Files

Sources_Edited.rar (878.7 KB, 3 views)

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