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Diffstat (limited to 'framework/Web/UI/WebControls/TImageButton.php')
| -rw-r--r-- | framework/Web/UI/WebControls/TImageButton.php | 320 |
1 files changed, 320 insertions, 0 deletions
diff --git a/framework/Web/UI/WebControls/TImageButton.php b/framework/Web/UI/WebControls/TImageButton.php new file mode 100644 index 00000000..6452c651 --- /dev/null +++ b/framework/Web/UI/WebControls/TImageButton.php @@ -0,0 +1,320 @@ +<?php
+/**
+ * TImageButton class file
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @link http://www.xisc.com/
+ * @copyright Copyright © 2004-2005, Qiang Xue
+ * @license http://www.opensource.org/licenses/bsd-license.php BSD License
+ * @version $Revision: $ $Date: $
+ * @package System.Web.UI.WebControls
+ */
+
+/**
+ * TImage class file
+ */
+require_once(dirname(__FILE__).'/TImage.php');
+
+/**
+ * TImageButton class
+ *
+ * TImageButton displays an image on the Web page and responds to mouse clicks on the image.
+ * It is similar to the TButton component except that the TImageButton also captures the
+ * coordinates where the image is clicked.
+ *
+ * Write a <b>OnClick</b> event handler to programmatically determine the coordinates
+ * where the image is clicked. The coordinates can be accessed through <b>x</b> and <b>y</b>
+ * properties of the event parameter which is of type <b>TImageClickEventParameter</b>.
+ * Note the origin (0, 0) is located at the upper left corner of the image.
+ *
+ * Write a <b>OnCommand</b> event handler to make the TImageButton component behave
+ * like a command button. A command name can be associated with the component by using
+ * the <b>CommandName</b> property. The <b>CommandParameter</b> property
+ * can also be used to pass additional information about the command,
+ * such as specifying ascending order. This allows multiple TImageButton components to be placed
+ * on the same Web page. In the event handler, you can also determine
+ * the <b>CommandName</b> property value and the <b>CommandParameter</b> property value
+ * through <b>name</b> and <b>parameter</b> of the event parameter which is of
+ * type <b>TCommandEventParameter</b>.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @version $Revision: $ $Date: $
+ * @package System.Web.UI.WebControls
+ * @since 3.0
+ */
+
+class TImageButton extends TImage implements IPostBackDataHandler, IPostBackEventHandler
+{
+ private $_x=0;
+ private $_y=0;
+
+ /**
+ * @return string tag name of the button
+ */
+ protected function getTagName()
+ {
+ return 'input';
+ }
+
+ /**
+ * Adds attribute name-value pairs to renderer.
+ * This overrides the parent implementation with additional button specific attributes.
+ * @param THtmlTextWriter the writer used for the rendering purpose
+ */
+ protected function addAttributesToRender($writer)
+ {
+ $page=$this->getPage();
+ $page->ensureRenderInForm($this);
+ $writer->addAttribute('type','image');
+ if(($uniqueID=$this->getUniqueID())!=='')
+ $writer->addAttribute('name',$uniqueID);
+
+ $onclick='';
+ if($this->getEnabled(true))
+ {
+ $onclick=$this->getOnClientClick();
+ if($onclick!=='')
+ $onclick=rtrim($onclick,';').';';
+ $onclick.=$page->getClientScript()->getPostBackEventReference($this->getPostBackOptions());
+ }
+ else if($this->getEnabled()) // in this case, parent will not render 'disabled'
+ $writer->addAttribute('disabled','disabled');
+ if($onclick!=='')
+ $writer->addAttribute('onclick','javascript:'.$onclick);
+ parent::addAttributesToRender($writer);
+ }
+
+ /**
+ * Returns postback specifications for the button.
+ * This method is used by framework and control developers.
+ * @return TPostBackOptions parameters about how the button defines its postback behavior.
+ */
+ protected function getPostBackOptions()
+ {
+ $options=new TPostBackOptions($this);
+ $options->ClientSubmit=false;
+ $page=$this->getPage();
+ if($this->getCausesValidation() && $page->getValidators($this->getValidationGroup())->getCount()>0)
+ {
+ $options->PerformValidation=true;
+ $options->ValidationGroup=$this->getValidationGroup();
+ }
+ if($this->getPostBackUrl()!=='')
+ $options->ActionUrl=$this->getPostBackUrl();
+ return $options;
+ }
+
+ /**
+ * This method checks if the TImageButton is clicked and loads the coordinates of the clicking position.
+ * This method is primarly used by framework developers.
+ * @param string the key that can be used to retrieve data from the input data collection
+ * @param array the input data collection
+ * @return boolean whether the data of the component has been changed
+ */
+ public function loadPostData($key,$values)
+ {
+ $uid=$this->getUniqueID();
+ if(isset($values["{$uid}_x"]) && isset($values["{$uid}_y"]))
+ {
+ $this->_x=intval($values["{$uid}_x"]);
+ $this->_y=intval($values["{$uid}_y"]);
+ $page=$this->getPage()->registerRequiresRaiseEvent($this);
+ }
+ return false;
+ }
+
+ /**
+ * Raises postback event.
+ * The implementation of this function should raise appropriate event(s) (e.g. OnClick, OnCommand)
+ * indicating the component is responsible for the postback event.
+ * This method is primarily used by framework developers.
+ * @param string the parameter associated with the postback event
+ */
+ public function raisePostBackEvent($param)
+ {
+ if($this->getCausesValidation())
+ $this->getPage()->validate($this->getValidationGroup());
+ $this->onClick(new TImageClickEventParameter($this->_x,$this->_y));
+ $this->onCommand(new TCommandEventParameter($this->getCommandName(),$this->getCommandParameter()));
+ }
+
+ /**
+ * A dummy implementation for the IPostBackDataHandler interface.
+ */
+ public function raisePostDataChangedEvent()
+ {
+ // no post data to handle
+ }
+
+ /**
+ * This method is invoked when the component is clicked.
+ * The method raises 'Click' event to fire up the event delegates.
+ * If you override this method, be sure to call the parent implementation
+ * so that the event delegates can be invoked.
+ * @param TEventParameter event parameter to be passed to the event handlers
+ */
+ public function onClick($param)
+ {
+ $this->raiseEvent('Click',$this,$param);
+ }
+
+ /**
+ * This method is invoked when the component is clicked.
+ * The method raises 'Command' event to fire up the event delegates.
+ * If you override this method, be sure to call the parent implementation
+ * so that the event delegates can be invoked.
+ * @param TCommandEventParameter event parameter to be passed to the event handlers
+ */
+ public function onCommand($param)
+ {
+ $this->raiseEvent('Command',$this,$param);
+ $this->raiseBubbleEvent($this,$param);
+ }
+
+ protected function onPreRender($param)
+ {
+ parent::onPreRender($param);
+ $this->getPage()->registerRequiresPostBack($this);
+ }
+
+ /**
+ * @return string the command name associated with the <b>OnCommand</b> event.
+ */
+ public function getCommandName()
+ {
+ return $this->getViewState('CommandName','');
+ }
+
+ /**
+ * Sets the command name associated with the <b>OnCommand</b> event.
+ * @param string the text caption to be set
+ */
+ public function setCommandName($value)
+ {
+ $this->setViewState('CommandName',$value,'');
+ }
+
+ /**
+ * @return string the parameter associated with the <b>OnCommand</b> event
+ */
+ public function getCommandParameter()
+ {
+ return $this->getViewState('CommandParameter','');
+ }
+
+ /**
+ * Sets the parameter associated with the <b>OnCommand</b> event.
+ * @param string the text caption to be set
+ */
+ public function setCommandParameter($value)
+ {
+ $this->setViewState('CommandParameter',$value,'');
+ }
+
+ /**
+ * @return boolean whether postback event trigger by this button will cause input validation
+ */
+ public function getCausesValidation()
+ {
+ return $this->getViewState('CausesValidation',true);
+ }
+
+ /**
+ * Sets the value indicating whether postback event trigger by this button will cause input validation.
+ * @param string the text caption to be set
+ */
+ public function setCausesValidation($value)
+ {
+ $this->setViewState('CausesValidation',$value,true);
+ }
+
+ /**
+ * @return string the group of validators which the button causes validation upon postback
+ */
+ public function getValidationGroup()
+ {
+ return $this->getViewState('ValidationGroup','');
+ }
+
+ /**
+ * @param string the group of validators which the button causes validation upon postback
+ */
+ public function setValidationGroup($value)
+ {
+ $this->setViewState('ValidationGroup',$value,'');
+ }
+
+ /**
+ * @return string the URL of the page to post to when the button is clicked, default is empty meaning post to the current page itself
+ */
+ public function getPostBackUrl()
+ {
+ return $this->getViewState('PostBackUrl','');
+ }
+
+ /**
+ * @param string the URL of the page to post to from the current page when the button is clicked, empty if post to the current page itself
+ */
+ public function setPostBackUrl($value)
+ {
+ $this->setViewState('PostBackUrl',$value,'');
+ }
+
+ /**
+ * @return string the javascript to be executed when the button is clicked
+ */
+ public function getOnClientClick()
+ {
+ return $this->getViewState('OnClientClick','');
+ }
+
+ /**
+ * @param string the javascript to be executed when the button is clicked. Do not prefix it with "javascript:".
+ */
+ public function setOnClientClick($value)
+ {
+ $this->setViewState('OnClientClick',$value,'');
+ }
+
+ /**
+ * @return string caption of the button
+ */
+ public function getText()
+ {
+ return $this->getAlternateText();
+ }
+
+ /**
+ * @param string caption of the button
+ */
+ public function setText($value)
+ {
+ $this->setAlternateText($value);
+ }
+}
+
+/**
+ * TImageClickEventParameter class
+ *
+ * TImageClickEventParameter encapsulates the parameter data for <b>OnClick</b>
+ * event of TImageButton components.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @version v1.0, last update on 2004/08/13 21:44:52
+ * @package System.Web.UI.WebControls
+ */
+class TImageClickEventParameter extends TEventParameter
+{
+ /**
+ * the X coordinate of the clicking point
+ * @var integer
+ */
+ public $x=0;
+ /**
+ * the Y coordinate of the clicking point
+ * @var integer
+ */
+ public $y=0;
+}
+
+?>
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