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authorDerek Jones <derek.jones@ellislab.com>2011-10-05 20:34:52 +0200
committerDerek Jones <derek.jones@ellislab.com>2011-10-05 20:34:52 +0200
commit8ede1a2ecbb62577afd32996956c5feaf7ddf9b6 (patch)
tree2e960ec3b416b477f40bb546371f2d486f4a22f0 /user_guide_src/source/libraries/table.rst
parentd1ecd5cd4ae6ab5d37df9fbda14b93977b9e743c (diff)
replacing the old HTML user guide with a Sphinx-managed user guide
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+################
+HTML Table Class
+################
+
+The Table Class provides functions that enable you to auto-generate HTML
+tables from arrays or database result sets.
+
+Initializing the Class
+======================
+
+Like most other classes in CodeIgniter, the Table class is initialized
+in your controller using the $this->load->library function::
+
+ $this->load->library('table');
+
+Once loaded, the Table library object will be available using:
+$this->table
+
+Examples
+========
+
+Here is an example showing how you can create a table from a
+multi-dimensional array. Note that the first array index will become the
+table heading (or you can set your own headings using the set_heading()
+function described in the function reference below).
+
+::
+
+ $this->load->library('table'); $data = array(              array('Name', 'Color', 'Size'),              array('Fred', 'Blue', 'Small'),              array('Mary', 'Red', 'Large'),              array('John', 'Green', 'Medium')              ); echo $this->table->generate($data);
+
+Here is an example of a table created from a database query result. The
+table class will automatically generate the headings based on the table
+names (or you can set your own headings using the set_heading()
+function described in the function reference below).
+
+::
+
+ $this->load->library('table'); $query = $this->db->query("SELECT * FROM my_table"); echo $this->table->generate($query);
+
+Here is an example showing how you might create a table using discrete
+parameters::
+
+ $this->load->library('table'); $this->table->set_heading('Name', 'Color', 'Size'); $this->table->add_row('Fred', 'Blue', 'Small'); $this->table->add_row('Mary', 'Red', 'Large'); $this->table->add_row('John', 'Green', 'Medium'); echo $this->table->generate();
+
+Here is the same example, except instead of individual parameters,
+arrays are used::
+
+ $this->load->library('table'); $this->table->set_heading(array('Name', 'Color', 'Size')); $this->table->add_row(array('Fred', 'Blue', 'Small')); $this->table->add_row(array('Mary', 'Red', 'Large')); $this->table->add_row(array('John', 'Green', 'Medium')); echo $this->table->generate();
+
+Changing the Look of Your Table
+===============================
+
+The Table Class permits you to set a table template with which you can
+specify the design of your layout. Here is the template prototype::
+
+ $tmpl = array (                     'table_open'          => '<table border="0" cellpadding="4" cellspacing="0">',                     'heading_row_start'   => '<tr>',                     'heading_row_end'     => '</tr>',                     'heading_cell_start'  => '<th>',                     'heading_cell_end'    => '</th>',                     'row_start'           => '<tr>',                     'row_end'             => '</tr>',                     'cell_start'          => '<td>',                     'cell_end'            => '</td>',                     'row_alt_start'       => '<tr>',                     'row_alt_end'         => '</tr>',                     'cell_alt_start'      => '<td>',                     'cell_alt_end'        => '</td>',                     'table_close'         => '</table>'               ); $this->table->set_template($tmpl);
+
+.. note:: You'll notice there are two sets of "row" blocks in the
+ template. These permit you to create alternating row colors or design
+ elements that alternate with each iteration of the row data.
+
+You are NOT required to submit a complete template. If you only need to
+change parts of the layout you can simply submit those elements. In this
+example, only the table opening tag is being changed::
+
+ $tmpl = array ( 'table_open'  => '<table border="1" cellpadding="2" cellspacing="1" class="mytable">' ); $this->table->set_template($tmpl);
+
+******************
+Function Reference
+******************
+
+$this->table->generate()
+========================
+
+Returns a string containing the generated table. Accepts an optional
+parameter which can be an array or a database result object.
+
+$this->table->set_caption()
+============================
+
+Permits you to add a caption to the table.
+
+::
+
+ $this->table->set_caption('Colors');
+
+$this->table->set_heading()
+============================
+
+Permits you to set the table heading. You can submit an array or
+discrete params::
+
+ $this->table->set_heading('Name', 'Color', 'Size');
+
+::
+
+ $this->table->set_heading(array('Name', 'Color', 'Size'));
+
+$this->table->add_row()
+========================
+
+Permits you to add a row to your table. You can submit an array or
+discrete params::
+
+ $this->table->add_row('Blue', 'Red', 'Green');
+
+::
+
+ $this->table->add_row(array('Blue', 'Red', 'Green'));
+
+If you would like to set an individual cell's tag attributes, you can
+use an associative array for that cell. The associative key 'data'
+defines the cell's data. Any other key => val pairs are added as
+key='val' attributes to the tag::
+
+ $cell = array('data' => 'Blue', 'class' => 'highlight', 'colspan' => 2); $this->table->add_row($cell, 'Red', 'Green'); // generates // <td class='highlight' colspan='2'>Blue</td><td>Red</td><td>Green</td>
+
+$this->table->make_columns()
+=============================
+
+This function takes a one-dimensional array as input and creates a
+multi-dimensional array with a depth equal to the number of columns
+desired. This allows a single array with many elements to be displayed
+in a table that has a fixed column count. Consider this example::
+
+ $list = array('one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine', 'ten', 'eleven', 'twelve'); $new_list = $this->table->make_columns($list, 3); $this->table->generate($new_list); // Generates a table with this prototype <table border="0" cellpadding="4" cellspacing="0"> <tr> <td>one</td><td>two</td><td>three</td> </tr><tr> <td>four</td><td>five</td><td>six</td> </tr><tr> <td>seven</td><td>eight</td><td>nine</td> </tr><tr> <td>ten</td><td>eleven</td><td>twelve</td></tr> </table>
+
+$this->table->set_template()
+=============================
+
+Permits you to set your template. You can submit a full or partial
+template.
+
+::
+
+ $tmpl = array ( 'table_open'  => '<table border="1" cellpadding="2" cellspacing="1" class="mytable">' ); $this->table->set_template($tmpl);
+
+$this->table->set_empty()
+==========================
+
+Let's you set a default value for use in any table cells that are empty.
+You might, for example, set a non-breaking space::
+
+ $this->table->set_empty("&nbsp;");
+
+$this->table->clear()
+=====================
+
+Lets you clear the table heading and row data. If you need to show
+multiple tables with different data you should to call this function
+after each table has been generated to empty the previous table
+information. Example::
+
+ $this->load->library('table'); $this->table->set_heading('Name', 'Color', 'Size'); $this->table->add_row('Fred', 'Blue', 'Small'); $this->table->add_row('Mary', 'Red', 'Large'); $this->table->add_row('John', 'Green', 'Medium'); echo $this->table->generate(); $this->table->clear(); $this->table->set_heading('Name', 'Day', 'Delivery'); $this->table->add_row('Fred', 'Wednesday', 'Express'); $this->table->add_row('Mary', 'Monday', 'Air'); $this->table->add_row('John', 'Saturday', 'Overnight'); echo $this->table->generate();
+
+$this->table->function
+======================
+
+Allows you to specify a native PHP function or a valid function array
+object to be applied to all cell data.
+
+::
+
+ $this->load->library('table'); $this->table->set_heading('Name', 'Color', 'Size'); $this->table->add_row('Fred', '<strong>Blue</strong>', 'Small'); $this->table->function = 'htmlspecialchars'; echo $this->table->generate();
+
+In the above example, all cell data would be ran through PHP's
+htmlspecialchars() function, resulting in::
+
+ <td>Fred</td><td>&lt;strong&gt;Blue&lt;/strong&gt;</td><td>Small</td>
+