New CheckBox Treeview

[dalyla]

Hello I'm making a Checkbox Treeview as a new component. I wasn't stopped in just add images to the treeview because I need Parent node check or uncheck childs. And if all childs are the same way parent too, or if there are diferent like a child checked and another not, parent turns grayed. This last doesn't have a normal combobox.

At this moment I get an error Cannot unserialize without owner or something like that.

PHP Code:

<?php
require_once("vcl/vcl.inc.php");
//Includes
use_unit("comctrls.inc.php");
use_unit("imglist.inc.php");
use_unit("extctrls.inc.php");
use_unit("stdctrls.inc.php");



//Class definition
class TreeViewCheckBox extends treeView
{   function getImageList()                 { return $this->readImageList(); }
    function setImageList($value)           { $this->writeImageList($value); }

    function __construct($aowner = null)
    {
    parent::__construct($aowner);

    $IconsList = new ImageList();
    $IconsList->setImages(array ( 1 => "unchecked.jpg", 2 => "grayed.jpg", 3 => "checked.jpg" ) );
    $this->ImageList = $IconsList;
    //$this->SetValueCheckBox();
    }

    function dumpContents()
    {
    parent::dumpContents();
    }

    function SetValueCheckBox()
    {
    $Node = $this->findNodeWithItemID($this->SelectedItemID);
    if($Node != null)
      if($Node->SelectedIndex == 1)
         $Node->SelectedIndex = 3;
      else
         $Node->SelectedIndex = 1;

    $this->EquateChildren($this->findNodeWithItemID($this->SelectedItemID));
    $this->UpdateNode($Node->ParentNode);
    }

    function UpdateNode($Node)
    {
    if(Assigned($Node))
        {
        $Count = 0;
        $Weight = 0;
        $i = 0;
        $Child = $Node->Items[$i];
        while(Assigned($Child))
            {
            $Child = $Node->Items[$i];
            $Weight = $Weight + ($Child->ImageIndex - 1);
            $Count++;
            $i++;
            }

        if($Weight < 0 )
            $Node->ImageIndex = 1;
        elseif($Weight < ($Count))
            $Node->ImageIndex = 2;
        else
            $Node->ImageIndex = 3;

        if($Node->ParentNode != Null)
            $this->UpdateNode($Node->ParentNode);
        }
    }

    function EquateChildren($Node = null)
    {
    $i = 0;
    $Child = $Node->Items[$i];
    while(Assigned($Child))
        {
        $Child->ImageIndex = $Node->ImageIndex;
        $this->EquateChildren($Child);
        $i++;
        $Child = $Node->Items[$i];
        }
    }
}

?>

Also the component doesn't show right in the design time. If I remove the images parts it show correctly, so it is well instaled. But has errors.

Another thing I don't know is how to catch php click, it just has a jsclick, and I need it to call Equatechildren and update nodes.

thanks in advance

[405hp]

I think php click would be very inefficient. (and unbearable)

What you want to do is use js click and set a hidden field to use later with php.

[dalyla]

Well this is my first component and I'm not sure how to do it. I know I have 2 problems, how to set those two new functions, and why appears this error:

Application raised an exception class Exception with message 'Cannot unserialize a component without an owner'

This last is a problem because I can't continue without solve it. I don't understand it, I think my component has an owner. The image list its owner is my treeview I guess. I can't identify which one is without owner.

What you say i'll probe it after solve this, because now i can't :P

thanks

[dalyla]

The error of unserialize come from a function LoadFromResource this function loads a component from a string I think it has to be with something wrong declaring my ImageList. Or lack of something.

**

About this I added this line in the construct

PHP Code:

$IconsList->owner = $this; 


Maybe this isn't the right declaration I don't know but now I can see my component.

Now I need to know how to call the other 2 functions

[405hp]

Now I need to know how to call the other 2 functions

When do you need to call them?

[dalyla]

Well, everytime when is checked or unchecked a node

[405hp]

I don't know what those functions are doing but it isn't practical to do something in php everytime someone checks a box unless it is forcing the page to do a big change.

[dalyla]

If you

[] 1
|-[] 1.1
|-[] 1.2
|-[] 1.3

if you click 1.1, as child of 1, 1 is grayed telling every one, at least I have one child checked.

[#] 1
|-[*] 1.1
|-[] 1.2
|-[] 1.3

But if all childrens are checked, father is checked normally, and it's saying All my children are checked. And if all childrens are unchecked father too, saying all my children are unchecked. So if I change a child y have to change father, and if I change father I have to change children.

And this code works I know because I probe it with a button, but i can't click tree and a button

[405hp]

Like I have been saying - IMO you need to do this in js and not php. php is not practical.

[dalyla]

Ok, I'm following what you said,
I don't get how to change the image index in javascript. It's more difficult because is qooxo, how I can get the properties?