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set background text class initially before rendering

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This commit is contained in:
Christian Weiske 2010-05-06 17:12:24 +02:00
parent 4285799c3f
commit 680822f0f4
1 changed files with 67 additions and 21 deletions
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72
src/SemanticScuttle/QuickForm2/Element/BackgroundText.php
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@ -19,9 +19,22 @@ require_once 'HTML/QuickForm2/Element/InputText.php';
class SemanticScuttle_QuickForm2_Element_BackgroundText
extends HTML_QuickForm2_Element_InputText
{
/**
* Background text to use
*
* @var string
*/
protected $btText = null;
/**
* Element class to use when background text is active
*
* @var string
*/
protected $btClass = null;
/**
* Sets the background text to show when the text element is
* empty and not focused
@ -32,12 +45,16 @@ class SemanticScuttle_QuickForm2_Element_BackgroundText
*/
public function setBackgroundText($text)
{
$this->btText = $text;
//we add a invisible separator character to distiguish
// user content from our default text
$this->btText = $text . "\342\201\243";
$this->btUpdateAttributes();
return $this;
}
/**
* Sets the HTML class to use when the text element is
* empty and not focused
@ -46,8 +63,6 @@ class SemanticScuttle_QuickForm2_Element_BackgroundText
* is not focused
*
* @return SemanticScuttle_QuickForm2_BackgroundText This object
*
* @FIXME: Class to set when it is focused
*/
public function setBackgroundClass($class)
{
@ -74,25 +89,35 @@ class SemanticScuttle_QuickForm2_Element_BackgroundText
return;
}
$jBtText = json_encode((string)$this->btText);
$jBtClass = json_encode($this->btClass);
$jOldClass = json_encode('');
if (isset($this->attributes['class'])) {
$jOldClass = json_encode($this->attributes['class']);
}
//FIXME: add and remove class only, store currently used class
$this->attributes['onfocus']
= 'if (this.value == '
. json_encode((string)$this->btText)
. ') this.value = "";';
= 'if (this.value == ' . $jBtText . ') {'
. 'this.value = "";'
. 'this.className = ' . $jOldClass . ';'
. '}';
$this->attributes['onblur']
= 'if (this.value == "") this.value = '
. json_encode((string)$this->btText)
. ';';
= 'if (this.value == "") {'
. 'this.value = ' . $jBtText . ';'
. 'this.className = ' . $jBtClass . ';'
. '}';
//default when loading the form
//FIXME: use some special char to distinguish that
//value from a user inputted one (i.e. UTF-8 empty character)
if (!isset($this->attributes['value']) || !$this->attributes['value']) {
if (!isset($this->attributes['value'])
|| !$this->attributes['value']
) {
$this->attributes['value'] = $this->btText;
}
//FIXME: class
}
/**
* Called when the element needs to update its value
* from form's data sources.
@ -113,5 +138,26 @@ class SemanticScuttle_QuickForm2_Element_BackgroundText
}
}
}
/**
* Renders the element using the given renderer.
* Automatically sets the background CSS class if the value
* is the background text.
*
* @param HTML_QuickForm2_Renderer Renderer instance
*
* @return HTML_QuickForm2_Renderer
*/
public function render(HTML_QuickForm2_Renderer $renderer)
{
if ($this->attributes['value'] == $this->btText) {
$this->attributes['class'] = $this->btClass;
}
$renderer->renderElement($this);
return $renderer;
}
}
?>