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Diffstat (limited to 'framework/Web/UI/WebControls/TButton.php')
| -rw-r--r-- | framework/Web/UI/WebControls/TButton.php | 291 |
1 files changed, 291 insertions, 0 deletions
diff --git a/framework/Web/UI/WebControls/TButton.php b/framework/Web/UI/WebControls/TButton.php new file mode 100644 index 00000000..f2ac6e21 --- /dev/null +++ b/framework/Web/UI/WebControls/TButton.php @@ -0,0 +1,291 @@ +<?php
+/**
+ * TButton 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
+ */
+
+/**
+ * TButton class
+ *
+ * TButton creates a click button on the page.
+ *
+ * You can create either a <b>submit</b> button or a <b>client</b> button by setting
+ * <b>UseSubmitBehavior</b> property. Set <b>Text</b> property to specify the button's caption.
+ * Upon clicking on the button, on the server side two events are raised by the button:
+ * <b>OnClick</b> and <b>OnCommand</b>. You can attach event handlers to these events
+ * to respond to the button click action. For <b>OnCommand</b> event, you can associate
+ * it with a command name and parameter by setting <b>CommandName</b> and <b>CommandParameter</b>
+ * properties, respectively. They are passed as the event parameter to the <b>OnCommand</b>
+ * event handler (see {@link TCommandEventParameter}).
+ *
+ * Clicking on button can trigger form validation, if <b>CausesValidation</b> is true.
+ * And the validation may be restricted within a certain group of validator controls by
+ * setting <b>ValidationGroup</b> property.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @version $Revision: $ $Date: $
+ * @package System.Web.UI.WebControls
+ * @since 3.0
+ */
+class TButton extends TWebControl implements IPostBackEventHandler
+{
+ /**
+ * @return string tag name of the button
+ */
+ protected function getTagName()
+ {
+ return 'input';
+ }
+
+ /**
+ * Processes an object that is created during parsing template.
+ * This overrides the parent implementation by forbidding any body components.
+ * @param mixed the newly created object in template
+ * @throws TInvalidOperationException if a component is found within body
+ */
+ public function addParsedObject($object)
+ {
+ if(!is_string($object))
+ throw new TInvalidOperationException('body_contents_not_allowed',get_class($this).':'.$this->getUniqueID());
+ }
+
+ /**
+ * 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);
+ if($this->getUseSubmitBehavior())
+ $writer->addAttribute('type','submit');
+ else
+ $writer->addAttribute('type','button');
+ if(($uniqueID=$this->getUniqueID())!=='')
+ $writer->addAttribute('name',$uniqueID);
+ $writer->addAttribute('value',$this->getText());
+
+ $onclick='';
+ if($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($writer);
+ }
+
+ /**
+ * Renders the body content enclosed between the control tag.
+ * This overrides the parent implementation with nothing to be rendered.
+ * @param THtmlTextWriter the writer used for the rendering purpose
+ */
+ protected function renderContents($writer)
+ {
+ }
+
+ /**
+ * OnClick event raiser.
+ * This method raises OnClick event.
+ * Be sure to invoke the parent implementation if this method is overriden.
+ * @param TEventParameter the event parameter
+ */
+ protected function onClick($param)
+ {
+ $this->raiseEvent('Click',$this,$param);
+ }
+
+ /**
+ * OnCommand event raiser.
+ * This method raises OnCommand event.
+ * Be sure to invoke the parent implementation if this method is overriden.
+ * @param TCommandEventParameter the event parameter
+ */
+ protected function onCommand($param)
+ {
+ $this->raiseEvent('Command',$this,$param);
+ $this->raiseBubbleEvent($this,$param);
+ }
+
+ /**
+ * Raises the postback event.
+ * This method is required by IPostBackEventHandler interface.
+ * If <b>CausesValidation</b> is true, it will invokes the page's {@validate}
+ * method first.
+ * It will raise <b>OnClick</b> and <b>OnCommand</b> events.
+ * This method is mainly used by framework and control developers.
+ * @param TEventParameter the event parameter
+ */
+ public function raisePostBackEvent($param)
+ {
+ if($this->getCausesValidation())
+ $this->getPage()->validate($this->getValidationGroup());
+ $this->onClick(new TEventParameter);
+ $this->onCommand(new TCommandEventParameter($this->getCommandName(),$this->getCommandParameter()));
+ }
+
+ /**
+ * 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();
+ $options->ClientSubmit=!$this->getUseSubmitBehavior();
+ return $options;
+ }
+
+ /**
+ * @return string caption of the button
+ */
+ public function getText()
+ {
+ return $this->getViewState('Text','');
+ }
+
+ /**
+ * @param string caption of the button
+ */
+ public function setText($value)
+ {
+ $this->setViewState('Text',$value,'');
+ }
+
+ /**
+ * @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 <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 to use the button as a submit button, default is true.
+ */
+ public function getUseSubmitBehavior()
+ {
+ return $this->getViewState('UseSubmitBehavior',true);
+ }
+
+ /**
+ * @param boolean whether to use the button as a submit button
+ */
+ public function setUseSubmitBehavior($value)
+ {
+ $this->setViewState('UseSubmitBehavior',TPropertyValue::ensureBoolean($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 $this->getViewState('ClientClick','');
+ }
+
+ /**
+ * @param string the javascript to be executed when the button is clicked. Do not prefix it with "javascript:".
+ */
+ public function setOnClientClick($value)
+ {
+ $this->setViewState('OClientClick',$value,'');
+ }
+}
+
+?>
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