With custom module, display result , - drupal

Question

function searchsong_block($op='list',$delta=0){
$block = array();
switch($op){
case "list":
$block[0][info] = t('Search song');
return $block;
case "view":
$block['subject']='THIS IS SONG SEARCH MODULE';
$block['content']=drupal_get_form('custom1_default_form');
return $block;
}
}
function custom1_default_form () {
$form = array();
$form['txt_name'] =
array('#type' => 'textfield',
'#title' => t('Please enter your name'),
'#default_value' => variable_get('webservice_user_url',''),
'#maxlength' => '40',
'#size' => '20',
);
$form['submit'] = array(
'#type' => 'submit',
'#value' => t('Save Details'),
);
return $form;
}
function custom1_default_form_validate (&$form, &$form_state) {
if(($form_state['values']['txt_name']) == '') {
form_set_error('user_webservice', t('Enter a name'));
}
}
function custom1_default_form_submit ($form_id, $form_values) {
$GET_TXT_VAL = $_POST['txt_name'];
$result = db_query('SELECT title FROM {node} WHERE type = "%s" AND title LIKE "%%%s%%"', 'song', $GET_TXT_VAL);
$output='';
while ($row = db_fetch_object($result)) {
// drupal_set_message($row->title);----IF I ENABLE THIS LINE THEN MY SEARCH RESULT DISPLAYING IN THE GREEN BLOCK, YES I KNOW THIS FUNCTION SOMETHING LIKE ECHO JUST FOR TESTING PURPOSE WE SHOULD USE
$output .=$row->title;
}
$block['content'] = $output;
}
How to print my output ,
Above module does not display anything , even error also,
i thing i should use theme('itemlist') somthing , but i am not sure how to use this , and where i should use this ,
So what i want is , i want to display my search result , in the content region ,
Please find my question picture view below..

Answer 1

Validate and submit are not for outputting data.
You should show your results in custom1_default_form:
Add in submit $_SESSION['search_text'] or use multistep "storage" (learn drupal form api for this).
But let's look how to work via sessions:
Add in custom1_default_form:
// Here is your form code, so form will appear on the top
// ...
if (isset($_SESSION['search_text'])) {
//add here your code from submit that output searching result
$form['result'] = array(
'#type' => 'item',
'#value' => $output,
);
unset($_SESSION['search_text']); // don't forget clear session
}
Your submit function should be like this:
function custom1_default_form_submit($form, &$form_state) {
$_SESSION['search_text'] = $form_state['values']['txt_name'];
// this will store text field into session, then reload page,
// so you drupal_get_form will see entered values.
}
This is all.
Tips:
if(($form_state['values']['txt_name']) == '') {
form_set_error('user_webservice', t('Enter a name'));
}
This code is not needed, if you do:
$form['txt_name'] = array(
... // other properties
'#required' => true,
);
Read please about form api here: http://api.drupal.org
Other way to use block, just call function that output result and form via drupal_get_form, so:
...
$block['content']='custom1_default_result';
...
function custom1_default_result () {
$output .= drupal_get_form('custom1_default_form');
...
$output .= //search result if session filled/
}