TImage displays an image on a page. The image is specified via the
{@link setImageUrl ImageUrl} property which takes a relative or absolute
URL to the image file. The alignment of the image displayed is set by
the {@link setImageAlign ImageAlign} property. To set alternative texts
or long description of the image, use {@link setAlternateText AlternateText}
or {@link setDescriptionUrl DescriptionUrl} property, respectively.
/**
* Renders this imagemap.
* @param THtmlWriter
*/
public function render($writer)
{
parent::render($writer);
$hotspots = $this->getHotSpots();
if ($hotspots->getCount() > 0) {
$clientID = $this->getClientID();
$cs = $this->getPage()->getClientScript();
$writer->writeLine();
$writer->addAttribute('name', self::MAP_NAME_PREFIX . $clientID);
$writer->renderBeginTag('map');
$writer->writeLine();
if (($mode = $this->getHotSpotMode()) === THotSpotMode::NotSet) {
$mode = THotSpotMode::Navigate;
}
$target = $this->getTarget();
$i = 0;
$options['EventTarget'] = $this->getUniqueID();
$options['StopEvent'] = true;
$cs = $this->getPage()->getClientScript();
foreach ($hotspots as $hotspot) {
if ($hotspot->getHotSpotMode() === THotSpotMode::NotSet) {
$hotspot->setHotSpotMode($mode);
}
if ($target !== '' && $hotspot->getTarget() === '') {
$hotspot->setTarget($target);
}
if ($hotspot->getHotSpotMode() === THotSpotMode::PostBack) {
$id = $clientID . '_' . $i;
$writer->addAttribute('id', $id);
$writer->addAttribute('href', '#' . $id);
//create unique no-op url references
$options['ID'] = $id;
$options['EventParameter'] = "{$i}";
$options['CausesValidation'] = $hotspot->getCausesValidation();
$options['ValidationGroup'] = $hotspot->getValidationGroup();
$cs->registerPostBackControl($this->getClientClassName(), $options);
}
$hotspot->render($writer);
$writer->writeLine();
$i++;
}
$writer->renderEndTag();
}
}
/**
* Registers the image button to receive postback data during postback.
* This is necessary because an image button, when postback, does not have
* direct mapping between post data and the image button name.
* This method overrides the parent implementation and is invoked before render.
* @param mixed event parameter
*/
public function onPreRender($param)
{
parent::onPreRender($param);
$this->getPage()->registerRequiresPostData($this);
}
/**
* Configures the image URL that shows the token.
* @param mixed event parameter
*/
public function onPreRender($param)
{
parent::onPreRender($param);
if (!self::checkRequirements()) {
throw new TConfigurationException('captcha_imagettftext_required');
}
if (!$this->getViewState('TokenGenerated', 0)) {
$manager = $this->getApplication()->getAssetManager();
$manager->publishFilePath($this->getFontFile());
$url = $manager->publishFilePath($this->getCaptchaScriptFile());
$url .= '?options=' . urlencode($this->getTokenImageOptions());
$this->setImageUrl($url);
$this->setViewState('TokenGenerated', time());
}
}
/**
* @param string the URL to the long description of the image.
*/
public function setDescriptionUrl($value)
{
if (parent::getDescriptionUrl() === $value) {
return;
}
parent::setDescriptionUrl($value);
if ($this->getActiveControl()->canUpdateClientSide()) {
$this->getPage()->getCallbackClient()->setAttribute($this, 'longdesc', $value);
}
}
/**
* Initializes the header cell.
*
* This method attempts to use {@link getHeaderRenderer HeaderRenderer} to
* instantiate the header cell. If that is not available, it will populate
* the cell with an image or a text string, depending on {@link getHeaderImageUrl HeaderImageUrl}
* and {@link getHeaderText HeaderText} property values.
*
* If the column allows sorting, image or text will be created as
* a button which issues <b>Sort</b> command upon user click.
*
* @param TTableCell the cell to be initialized
* @param integer the index to the Columns property that the cell resides in.
*/
protected function initializeHeaderCell($cell, $columnIndex)
{
$text = $this->getHeaderText();
if (($classPath = $this->getHeaderRenderer()) !== '') {
$control = Prado::createComponent($classPath);
$cell->getControls()->add($control);
if ($control instanceof \Prado\IDataRenderer) {
if ($control instanceof IItemDataRenderer) {
$item = $cell->getParent();
$control->setItemIndex($item->getItemIndex());
$control->setItemType($item->getItemType());
}
$control->setData($text);
}
} else {
if ($this->getAllowSorting()) {
$sortExpression = $this->getSortExpression();
if (($url = $this->getHeaderImageUrl()) !== '') {
$button = new TImageButton();
$button->setImageUrl($url);
$button->setCommandName(TDataGrid::CMD_SORT);
$button->setCommandParameter($sortExpression);
if ($text !== '') {
$button->setAlternateText($text);
}
$button->setCausesValidation(false);
$cell->getControls()->add($button);
} else {
if ($text !== '') {
$button = new TLinkButton();
$button->setText($text);
$button->setCommandName(TDataGrid::CMD_SORT);
$button->setCommandParameter($sortExpression);
$button->setCausesValidation(false);
$cell->getControls()->add($button);
} else {
$cell->setText(' ');
}
}
} else {
if (($url = $this->getHeaderImageUrl()) !== '') {
$image = new TImage();
$image->setImageUrl($url);
if ($text !== '') {
$image->setAlternateText($text);
}
$cell->getControls()->add($image);
} else {
if ($text !== '') {
$cell->setText($text);
} else {
$cell->setText(' ');
}
}
}
}
}
/**
* Gets the TImage for rendering the ImageUrl property. This is not for
* creating dynamic images.
* @param string image url.
* @return TImage image control for rendering.
*/
protected function createImage($imageUrl)
{
$image = new TImage();
$image->setImageUrl($imageUrl);
if (($width = $this->getImageWidth()) !== '') {
$image->setWidth($width);
}
if (($height = $this->getImageHeight()) !== '') {
$image->setHeight($height);
}
if (($toolTip = $this->getToolTip()) !== '') {
$image->setToolTip($toolTip);
}
if (($text = $this->getText()) !== '') {
$image->setAlternateText($text);
}
if (($align = $this->getImageAlign()) !== '') {
$image->setImageAlign($align);
}
$image->setBorderWidth('0');
return $image;
}