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Diffstat (limited to 'lib/prado/framework/Web/UI/WebControls/TImageButton.php')
| -rw-r--r-- | lib/prado/framework/Web/UI/WebControls/TImageButton.php | 438 |
1 files changed, 438 insertions, 0 deletions
diff --git a/lib/prado/framework/Web/UI/WebControls/TImageButton.php b/lib/prado/framework/Web/UI/WebControls/TImageButton.php new file mode 100644 index 0000000..288def3 --- /dev/null +++ b/lib/prado/framework/Web/UI/WebControls/TImageButton.php @@ -0,0 +1,438 @@ +<?php +/** + * TImageButton class file + * + * @author Qiang Xue <qiang.xue@gmail.com> + * @link https://github.com/pradosoft/prado + * @copyright Copyright © 2005-2015 The PRADO Group + * @license https://github.com/pradosoft/prado/blob/master/COPYRIGHT + * @package System.Web.UI.WebControls + */ + +/** + * Includes TImage class file + */ +Prado::using('System.Web.UI.WebControls.TImage'); + +/** + * TImageButton class + * + * TImageButton creates an image button on the page. It is used to submit data to a page. + * You can create either a <b>submit</b> button or a <b>command</b> button. + * + * A <b>command</b> button has a command name (specified by + * the {@link setCommandName CommandName} property) and and a command parameter + * (specified by {@link setCommandParameter CommandParameter} property) + * associated with the button. This allows you to create multiple TLinkButton + * components on a Web page and programmatically determine which one is clicked + * with what parameter. You can provide an event handler for + * {@link onCommand OnCommand} event to programmatically control the actions performed + * when the command button is clicked. In the event handler, you can determine + * the {@link setCommandName CommandName} property value and + * the {@link setCommandParameter CommandParameter} property value + * through the {@link TCommandParameter::getName Name} and + * {@link TCommandParameter::getParameter Parameter} properties of the event + * parameter which is of type {@link TCommandEventParameter}. + * + * A <b>submit</b> button does not have a command name associated with the button + * and clicking on it simply posts the Web page back to the server. + * By default, a TImageButton control is a submit button. + * You can provide an event handler for the {@link onClick OnClick} event + * to programmatically control the actions performed when the submit button is clicked. + * The coordinates of the clicking point can be obtained from the {@link onClick OnClick} + * event parameter, which is of type {@link TImageClickEventParameter}. + * + * Clicking on button can trigger form validation, if + * {@link setCausesValidation CausesValidation} is true. + * And the validation may be restricted within a certain group of validator + * controls by setting {@link setValidationGroup ValidationGroup} property. + * If validation is successful, the data will be post back to the same page. + * + * TImageButton displays the {@link setText Text} property as the hint text to the displayed image. + * + * @author Qiang Xue <qiang.xue@gmail.com> + * @package System.Web.UI.WebControls + * @since 3.0 + */ +class TImageButton extends TImage implements IPostBackDataHandler, IPostBackEventHandler, IButtonControl +{ + /** + * @var integer x coordinate that the image is being clicked at + */ + private $_x=0; + /** + * @var integer y coordinate that the image is being clicked at + */ + private $_y=0; + private $_dataChanged=false; + + /** + * @return string tag name of the button + */ + protected function getTagName() + { + return 'input'; + } + + /** + * @return boolean whether to render javascript. + */ + public function getEnableClientScript() + { + return $this->getViewState('EnableClientScript',true); + } + + /** + * @param boolean whether to render javascript. + */ + public function setEnableClientScript($value) + { + $this->setViewState('EnableClientScript',TPropertyValue::ensureBoolean($value),true); + } + + /** + * Adds attribute name-value pairs to renderer. + * This overrides the parent implementation with additional button specific attributes. + * @param THtmlWriter 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); + if($this->getEnabled(true)) + { + if($this->getEnableClientScript() && $this->needPostBackScript()) + $this->renderClientControlScript($writer); + } + else if($this->getEnabled()) // in this case, parent will not render 'disabled' + $writer->addAttribute('disabled','disabled'); + parent::addAttributesToRender($writer); + } + + /** + * Renders the client-script code. + */ + protected function renderClientControlScript($writer) + { + $writer->addAttribute('id',$this->getClientID()); + $cs = $this->getPage()->getClientScript(); + $cs->registerPostBackControl($this->getClientClassName(),$this->getPostBackOptions()); + } + + /** + * Gets the name of the javascript class responsible for performing postback for this control. + * This method overrides the parent implementation. + * @return string the javascript class name + */ + protected function getClientClassName() + { + return 'Prado.WebUI.TImageButton'; + } + + /** + * @return boolean whether to perform validation if the button is clicked + */ + protected function canCauseValidation() + { + if($this->getCausesValidation()) + { + $group=$this->getValidationGroup(); + return $this->getPage()->getValidators($group)->getCount()>0; + } + else + return false; + } + + /** + * @param boolean set by a panel to register this button as the default button for the panel. + */ + public function setIsDefaultButton($value) + { + $this->setViewState('IsDefaultButton', TPropertyValue::ensureBoolean($value),false); + } + + /** + * @return boolean true if this button is registered as a default button for a panel. + */ + public function getIsDefaultButton() + { + return $this->getViewState('IsDefaultButton', false); + } + + /** + * @return boolean whether the button needs javascript to do postback + */ + protected function needPostBackScript() + { + return $this->canCauseValidation() || $this->getIsDefaultButton(); + } + + /** + * Returns postback specifications for the button. + * This method is used by framework and control developers. + * @return array parameters about how the button defines its postback behavior. + */ + protected function getPostBackOptions() + { + $options['ID'] = $this->getClientID(); + $options['CausesValidation'] = $this->getCausesValidation(); + $options['ValidationGroup'] = $this->getValidationGroup(); + $options['EventTarget'] = $this->getUniqueID(); + + 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["{$uid}_y"]); + if($this->getPage()->getPostBackEventTarget()===null) + $this->getPage()->setPostBackEventTarget($this); + $this->_dataChanged=true; + } + return false; + } + + /** + * A dummy implementation for the IPostBackDataHandler interface. + */ + public function raisePostDataChangedEvent() + { + // no post data to handle + } + + /** + * This method is invoked when the button is clicked. + * The method raises 'OnClick' event to fire up the event handlers. + * If you override this method, be sure to call the parent implementation + * so that the event handler can be invoked. + * @param TImageClickEventParameter event parameter to be passed to the event handlers + */ + public function onClick($param) + { + $this->raiseEvent('OnClick',$this,$param); + } + + /** + * This method is invoked when the button is clicked. + * The method raises 'OnCommand' event to fire up the event handlers. + * If you override this method, be sure to call the parent implementation + * so that the event handlers can be invoked. + * @param TCommandEventParameter event parameter to be passed to the event handlers + */ + public function onCommand($param) + { + $this->raiseEvent('OnCommand',$this,$param); + $this->raiseBubbleEvent($this,$param); + } + + /** + * Raises the postback event. + * This method is required by {@link IPostBackEventHandler} interface. + * If {@link getCausesValidation CausesValidation} is true, it will + * invoke the page's {@link TPage::validate validate} method first. + * It will raise {@link onClick OnClick} and {@link onCommand OnCommand} events. + * This method is mainly used by framework and control developers. + * @param TEventParameter the event parameter + */ + public function raisePostBackEvent($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())); + } + + /** + * Returns a value indicating whether postback has caused the control data change. + * This method is required by the IPostBackDataHandler interface. + * @return boolean whether postback has caused the control data change. False if the page is not in postback mode. + */ + public function getDataChanged() + { + return $this->_dataChanged; + } + + /** + * @return boolean whether postback event trigger by this button will cause input validation, default is true + */ + public function getCausesValidation() + { + return $this->getViewState('CausesValidation',true); + } + + /** + * @param boolean whether postback event trigger by this button will cause input validation + */ + public function setCausesValidation($value) + { + $this->setViewState('CausesValidation',TPropertyValue::ensureBoolean($value),true); + } + + /** + * @return string the command name associated with the {@link onCommand OnCommand} event. + */ + public function getCommandName() + { + return $this->getViewState('CommandName',''); + } + + /** + * @param string the command name associated with the {@link onCommand OnCommand} event. + */ + public function setCommandName($value) + { + $this->setViewState('CommandName',$value,''); + } + + /** + * @return string the parameter associated with the {@link onCommand OnCommand} event + */ + public function getCommandParameter() + { + return $this->getViewState('CommandParameter',''); + } + + /** + * @param string the parameter associated with the {@link onCommand OnCommand} event. + */ + public function setCommandParameter($value) + { + $this->setViewState('CommandParameter',$value,''); + } + + /** + * @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 caption of the button + */ + public function getText() + { + return $this->getAlternateText(); + } + + /** + * @param string caption of the button + */ + public function setText($value) + { + $this->setAlternateText($value); + } + + /** + * 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); + } + + /** + * Renders the body content enclosed between the control tag. + * This overrides the parent implementation with nothing to be rendered. + * @param THtmlWriter the writer used for the rendering purpose + */ + public function renderContents($writer) + { + } +} + +/** + * TImageClickEventParameter class + * + * TImageClickEventParameter encapsulates the parameter data for + * {@link TImageButton::onClick Click} event of {@link TImageButton} controls. + * + * @author Qiang Xue <qiang.xue@gmail.com> + * @package System.Web.UI.WebControls + * @since 3.0 + */ +class TImageClickEventParameter extends TEventParameter +{ + /** + * the X coordinate of the clicking point + * @var integer + */ + private $_x=0; + /** + * the Y coordinate of the clicking point + * @var integer + */ + private $_y=0; + + /** + * Constructor. + * @param integer X coordinate of the clicking point + * @param integer Y coordinate of the clicking point + */ + public function __construct($x,$y) + { + $this->_x=$x; + $this->_y=$y; + } + + /** + * @return integer X coordinate of the clicking point, defaults to 0 + */ + public function getX() + { + return $this->_x; + } + + /** + * @param integer X coordinate of the clicking point + */ + public function setX($value) + { + $this->_x=TPropertyValue::ensureInteger($value); + } + + /** + * @return integer Y coordinate of the clicking point, defaults to 0 + */ + public function getY() + { + return $this->_y; + } + + /** + * @param integer Y coordinate of the clicking point + */ + public function setY($value) + { + $this->_y=TPropertyValue::ensureInteger($value); + } +} + |