Updating page editor hooks for v4.9.3

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(Overview)
(The code)
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====The code====
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====pe-properties_dialog_layer====
 
The code for the scrolling newsbox properties layer looks like this.
 
The code for the scrolling newsbox properties layer looks like this.
 
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====Notes/Further Explanation====
 
====Notes/Further Explanation====
 
Note: There are 2 page editor hooks.  One in page_editor-ff.php for Firefox and one in page_editor.php for Internet Explorer.  Because the JavaScript I use in this layer is cross browser compatible, my layers scroll_props-ff.php and scroll_props.php are identical other than the cancel button functions which I explain later.
 
Note: There are 2 page editor hooks.  One in page_editor-ff.php for Firefox and one in page_editor.php for Internet Explorer.  Because the JavaScript I use in this layer is cross browser compatible, my layers scroll_props-ff.php and scroll_props.php are identical other than the cancel button functions which I explain later.

Revision as of 10:39, 22 August 2007

Contents

Overview

Introduction

This article should explain the changes made to the page editor hook attachments for version 4.9.3. Standard hooks such as pe_ff-place_object_js and pe_ff-properties_dialog_layer will no longer be used as the page editor files (page_editor.php and page_editor-ff.php) have been combined. page_editor.php is about half the size and quite a bit more efficient. Functionality such as moving single objects to and from cells, stretching cells which display all content of the cell, and updated visual effects have been added.

Just like the Plugging-in to the Page Editor article, the Scrolling Newsbox plugin will be used to show comparisons between the old way and the new way.

Standard hooks utilized

The following hooks will be utilized via the hook_attach() method

  • pe-place_object_js
  • pe-properties_dialog_layer
  • rtb_contentloop
  • pe-confile_object_data

Files that will be created

  • eng-icon_scroll.gif
  • scroll_props.php
  • scroll_js.php
  • scroll_props.php
  • scroll_rtb.php
  • scroll_write.php

Install manifest

What the completed install manifest will look like

The only difference here is the removed Firefox hook_attach.

#Firefox
hook_attach("scroll_js-ff.php", "pe_ff-place_object_js");
hook_attach("scroll_props-ff.php", "pe_ff-properties_dialog_layer");

The hooks "pe_ff-place_object_js" and "pe_ff-properties_dialog_layer" are no longer in the code and will not have any effect.

<?
# PLUGIN INFO
$plugin_folder = "SCROLLNEWS";
$plugin_title = "Scrolling Newbox";
$plugin_version = "2.1";
$plugin_description = "Cool scrolling newsbox.";
$plugin_author = "Joe Lain";
$plugin_homepage = "http://soholaunch.com";
$plugin_icon = "scrolling_icon.gif";
$plugin_options_link = "newsbox_setup.php";

# PLUGIN DATABASE TABLES
# If this plugin creates any database tables
# list them here so that Pro Edition knows to drop them
# during the un-installation process
$drop_tables[] = "scrolling_newsbox_cat";
$drop_tables[] = "scrolling_newsbox_content";

# SPECIAL HOOK: Main menu button
# Use this if you want to place a button for your plugin on Pro Edition's Main Menu
# ...which links to some kind of config/managment module for your plugin.
# If your plugin doesn't involve a config/management module 
# (as in, it runs exactly as installed with no further input needed from the user)
# then a main menu button probably isn't neccessary.
$data = array();
$data['enabled_button_image'] = "scrolling_icon.gif";
$data['disabled_button_image'] = "scrolling_icon.gif";
$data['enabled_button_link'] = "newsbox_setup.php";
$data['button_caption_text'] = "Scrolling Newsbox";
$data['multiuser_access_code'] = ";MOD_SCROLLING_NEWSBOX;";
hook_special("main_menu_button", $data);

# SPECIAL HOOK: Header nav buttons
$data = array();
$data['button1']['button_text'] = "Scrolling Newsbox Menu"; // This string will be passed through lang() for translation
$data['button1']['button_onclick'] = base64_encode("parent.body.location.href='../plugins/SCROLLNEWS/newsbox_setup';"); // Do not use single quotes in this string

hook_special("header_nav_buttons", $data);

# Page Editor
$data = array();
$data['draggable_object_image'] = "eng-icon_scroll.gif";
$data['draggable_object_id'] = "scroll_obj";
$data['properties_dialog_id'] = "scrollProps";
$data['mod_folder'] = $plugin_folder;
$data['properties_dialog_file'] = $plugin_folder.DIRECTORY_SEPARATOR."scroll_props.php";
$data['place_object_js_function'] = $plugin_folder.DIRECTORY_SEPARATOR."scroll_js.php";
hook_special("page_editor_object", $data);

# Page Editor javascript and properties layer
hook_attach("scroll_js.php", "pe-place_object_js");
hook_attach("scroll_props.php", "pe-properties_dialog_layer");

# Misc
hook_attach("scroll_rtb.php", "rtb_contentloop");
hook_attach("scroll_write.php", "pe-confile_object_data");
?>


The Changed Files

Overview

Here I will explain the differences in the page editor properties layer and javascript. This applies to the following portion of our install manifest.

# Page Editor javascript and properties layer
hook_attach("scroll_js.php", "pe-place_object_js");
hook_attach("scroll_props.php", "pe-properties_dialog_layer");

pe-properties_dialog_layer

The code for the scrolling newsbox properties layer looks like this.

<DIV ID="scrollProps" style="position:absolute; left:0px; top:0px; width:100%; height:115; z-index:4; overflow: none; background-color: oldlace; visibility: hidden" onMouseOver="HighDropZone();">

     <table border=1 cellpadding=0 cellspacing=0 width=100% height=100% style='border: 1px inset black;'>
          <tr>
               <td align=center valign=middle>

                    <table border=0 cellpadding=2 cellspacing=0 width=100%>
	       <tr>
	            <td align=center valign=top class=ctable>

		Which Scrolling Newsbox should appear here?

		<SELECT id="scrollname" NAME="scrollname" style='font-face: Arial; font-size: 8pt; width: 250px;'>
		     <option value="NULL" STYLE='color:#999999;'>Newsboxes:</option>

		     <?

   	     $result = mysql_query("SELECT * FROM scrolling_newsbox_cat");

     while ($row=mysql_fetch_array($result)){
		          if ($tmp == "#EFEFEF") { $tmp = "WHITE"; } else { $tmp = "#EFEFEF"; }
		          echo "<option value=\"".$row['prikey']."\" STYLE='background: $tmp;'>
                                              ".$row['CAT_NAME']."</option>\n";
		     }

		     ?>

		</SELECT>

	             </td>
	             <td align=center valign=middle>

	 	<input type=button class=mikebut onMouseOver="this.className='mikebutOn';" 
onMouseOut="this.className='mikebut';" value=" OK " onClick="OkScrollData(); 
show_hide_layer('objectbar_mods','','show','scrollProps','','hide');">
		  <input type=button class=mikebut onMouseOver="this.className='mikebutOn';" 
onMouseOut="this.className='mikebut';" value=" Cancel "
onClick="show_hide_layer('objectbar_mods','','show','scrollProps','','hide'); 
replaceImageData();makeUnScroll(ColRowID);">

	              </td>
	         </tr>
	    </table>
	</td>

           </tr>
     </table>

</DIV>

Notes/Further Explanation

Note: There are 2 page editor hooks. One in page_editor-ff.php for Firefox and one in page_editor.php for Internet Explorer. Because the JavaScript I use in this layer is cross browser compatible, my layers scroll_props-ff.php and scroll_props.php are identical other than the cancel button functions which I explain later.

When the OK button is clicked the function OkScrollData(); is called. Where is this function you ask? This function is one that I define in my JavaScript file which is added to the object_drops.php file. The function show_hide_layer('objectbar_mods',,'show','scroll Props',,'hide'); is also called when the OK button is clicked. This function hides my scrollProps layer and shows the objectbar_mods layer. scrollProps is the id of my properties layer.

When the Cancel button is clicked the show_hide_layers() function is called(explained in last paragraph). Also replaceImageData(); and makeUnScroll(ColRowID) are called. All plug-in will need to add these two functions to their cancel button for Firefox properties layers. Internet Explorer properties layers should not have these functions.

object_drops.php and object_drops-ff.php

Overview

The object drops file contains the JavaScript that interacts with the properties layers. For the scrolling newsbox scroll_js.php and scroll_js-ff.php are the files that contain the JavaScript to interact with my properties layer.

This function is called when the OK button is clicked from my properties layer. The result of this function looks like this. File:Example.jpg (screenshot of inserted object goes here)

The code

The JavaScript for the scrolling newsbox looks like this.

function OkScrollData() {
	doOperation = 0;

var dataTrue = dataData.search("pixel.gif");

	disOne = scrollname.selectedIndex;
	tscrollname = eval("scrollname.options["+disOne+"].value");

	tscrollname = tscrollname.toString();

                  TextHeader = "<img src=images/text_header.gif width=199 height=15 border=0 align=left vspace=0 hspace=0 
style='cursor: move;'><BR CLEAR=ALL>";
	
TableStart = "<table border=0 cellpadding=2 cellspacing=0 style='border: 1px inset black; background: #EFEFEF;'> 
<tr><td width=199 align=center valign=top>";
    	
TableEnd = "</td></tr></table><!-- ~~~ -->";

	if (dataTrue > 0) {
	     sText = TableStart+TextHeader+"<font style='font-family: Arial; font-size: 8pt;'><U><font color=darkblue>Scroll Box 
     : "+tscrollname+"</font></U></FONT><!-- ##SCROLLNEWS;"+tscrollname+"## -->"+TableEnd;
	     doOperation = 1;
	} else {
	     sText = dataData+"<BR>"+TableStart+TextHeader+"<font style='font-family: Arial; font-size: 8pt;'><U><font 
     color=darkblue>Scroll Box : "+tscrollname+"</font></U></FONT><!-- ##SCROLLNEWS;"+tscrollname+"## --
     >"+TableEnd;
	    doOperation = 1;
	}

	if (doOperation == 1) {
	     document.getElementById(ColRowID).innerHTML= sText;
	     document.getElementById(ColRowID).style.backgroundColor= "#FFFFFF";
	}
  	scrollname.selectedIndex = 0;	// Reset Selection to Nothing(Null)
}

HTML output

This is what that our OkScrollData function ultimatly inserts into the page editor:

<table style="border: 1px inset black; background: rgb(239, 239, 239) none repeat scroll 0%;" border="0" cellpadding="2" cellspacing="0">
  <tbody>
    <tr>
      <td align="center" valign="top" width="199">
        <img src="images/text_header.gif" style="cursor: move;" align="left" border="0" 
        height="15" hspace="0" vspace="0" width="199"><br clear="all">
        <font style="font-family: Arial; font-size: 8pt;"><u><font color="darkblue">
          Scroll Box : 1
        </font></u></font>
        <!-- ##SCROLLNEWS;1## -->
      </td>
    </tr>
   </tbody>
</table>
<!-- ~~~ -->

Notice the . When the page is saved object_write.php interprets this. I will explain more in the object_write.php section.

object_write.php

The purpose of the object_write.php file is to read objects that are placed on the page and place the appropriate code into the con and regen files. This happens when a page is saved.

The con and regen files are saved as page_name.con and page_name.regen.

page_name.con contains code to display on the website page_name.regen contains code to display the page in the page editor

When a page is saved that looks like this-

File:Example.jpg (screenshot of page editor with scrollnews object dropped on page goes here)

The con file would look like this-

<table border="0" cellpadding="1" cellspacing="0" width="100%" align="center">

<!-- Content Row 1 ----------------------------------------- -->
<tr>
     <td align=center valign=top width=33%><div align=center>
<!-- ##SCROLLNEWS;1## -->
</div>
</td>
     <td align=center valign=top width=66% colspan=2><div align=center>
<!-- ##BLOG;Latest News## -->
</div>
</td>
</tr>
         
</table>

So our scroll_write.php file needs to take the Code 3 example and strip out everything but the

This is what my scroll_write.php file looks like-

<?
########################################
#### SCROLLING NEWSBOX	                 
########################################
if (eregi("##SCROLLNEWS", $thisobj)) {	
   $tmp = eregi("<!-- ##SCROLLNEWS;(.*)## -->", $thisobj, $out);
   $dataname = $out[1];
   $droparea .= "\n\n<!-- ##SCROLLNEWS;$dataname## -->\n\n";
}
?>

If ##SCROLLNEWS is found on the page, this adds to the con file for display on the site.

pgm-realtime_builder.php

At this point in the process you should see in the source on your page. Now we need to turn this into an actual display for our scrolling newsbox. This is where pgm-realtime_builder.php comes in. It loops through every line of the pages con file and finds any code like our and replaces it with the appropriate code. Realtime builder already looks for all the regular modules, we need to add one for the scrolling newsbox.

I do this in my scroll_rtb.php file. Here is what it looks like.

<?
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// INSERT CODE FOR SCROLLING NEWSBOX
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
if (eregi("##SCROLLNEWS", $content_line[$sohocontent])) {
   $tmp = eregi("<!-- ##SCROLLNEWS;(.*)## -->", $content_line[$sohocontent], $out);
   $SCROLL_CATEGORY_NAME = $out[1];

   $filename = "sohoadmin/plugins/SCROLLNEWS/pgm-scroll_news.php";

   ob_start();
   include("$filename");
   $content_line[$sohocontent] = ob_get_contents();
   ob_end_clean();

}
?>

When ##SCROLLNEWS is found it includes my pgm-scroll_news.php display file which has the JavaScript to create the scrolling newsbox.

Final note

I would encourage you to look at all the files that I have discussed. This may seem like a ton of information but it is really only a couple files. Once you have finished one module the next will come much easier. The scrolling newsbox took me a little over half a day to complete.

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