Prado\Web\UI\WebControls\TWizard

Complexity

Total Complexity

224

Size/Duplication

Total Lines	1326
Duplicated Lines	15.01 %

Coupling/Cohesion

Components	1
Dependencies	30

Importance

Changes

0

83 Methods

Rating	Name	Duplication	Size	Complexity
A	getTagName()	0	4	1
A	addParsedObject()	0	6	2
A	getActiveStep()	0	4	1
A	setActiveStep()	0	7	2
A	getActiveStepIndex()	0	4	1
A	setActiveStepIndex()	0	13	4
A	getWizardSteps()	0	7	2
A	getShowCancelButton()	0	4	1
A	setShowCancelButton()	0	4	1
A	getShowSideBar()	0	4	1
A	setShowSideBar()	0	4	1
A	getStartNavigationTemplate()	0	4	1
A	setStartNavigationTemplate()	0	5	1
A	getStepNavigationTemplate()	0	4	1
A	setStepNavigationTemplate()	0	5	1
A	getFinishNavigationTemplate()	0	4	1
A	setFinishNavigationTemplate()	0	5	1
A	getHeaderTemplate()	0	4	1
A	setHeaderTemplate()	0	5	1
A	getSideBarTemplate()	0	4	1
A	setSideBarTemplate()	0	5	1
A	getHeaderText()	0	4	1
A	setHeaderText()	0	4	1
A	getCancelDestinationUrl()	0	4	1
A	setCancelDestinationUrl()	0	4	1
A	getFinishDestinationUrl()	0	4	1
A	setFinishDestinationUrl()	0	4	1
A	getSideBarButtonStyle()	8	8	2
A	getNavigationButtonStyle()	8	8	2
A	getStartNextButtonStyle()	9	9	2
A	getStepNextButtonStyle()	9	9	2
A	getStepPreviousButtonStyle()	9	9	2
A	getFinishCompleteButtonStyle()	9	9	2
A	getFinishPreviousButtonStyle()	9	9	2
A	getCancelButtonStyle()	9	9	2
A	getSideBarStyle()	8	8	2
A	getHeaderStyle()	8	8	2
A	getStepStyle()	8	8	2
A	getNavigationStyle()	8	8	2
A	getUseDefaultLayout()	0	4	1
A	setUseDefaultLayout()	0	4	1
A	getHeader()	0	4	1
A	getStepContent()	0	4	1
A	getSideBar()	0	4	1
A	getStartNavigation()	0	4	1
A	getStepNavigation()	0	4	1
A	getFinishNavigation()	0	4	1
A	onActiveStepChanged()	0	4	1
A	onCancelButtonClick()	0	7	2
A	onCompleteButtonClick()	0	7	2
A	onNextButtonClick()	0	4	1
A	onPreviousButtonClick()	0	4	1
A	onSideBarButtonClick()	0	4	1
A	getMultiView()	0	10	2
A	addedWizardStep()	0	8	2
A	removedWizardStep()	0	5	1
A	onInit()	0	9	3
A	saveState()	0	8	3
A	requiresControlsRecreation()	0	6	2
B	render()	0	26	3
A	applyControlProperties()	0	7	1
A	applyHeaderProperties()	4	10	3
B	applySideBarProperties()	0	19	7
A	applyStepContentProperties()	0	6	2
F	applyNavigationProperties()	49	112	30
A	getHistory()	0	8	2
C	getStepType()	0	22	8
A	reset()	0	12	1
A	createChildControls()	0	9	1
A	createHeader()	5	10	2
B	createSideBar()	0	22	4
D	dataListItemCommand()	3	28	9
B	dataListItemDataBound()	0	21	8
A	createStepContent()	0	15	4
A	createNavigation()	0	20	4
A	createStartNavigation()	9	9	2
A	createStepNavigation()	9	9	2
A	createFinishNavigation()	9	9	2
A	wizardStepsChanged()	0	8	2
C	getPreviousStepIndex()	0	24	8
A	allowNavigationToPreviousStep()	0	8	2
A	allowNavigationToStep()	0	8	2
D	bubbleEvent()	9	88	29

<?php
/**
 * TWizard and the relevant class definitions.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @link https://github.com/pradosoft/prado
 * @copyright Copyright &copy; 2005-2016 The PRADO Group
 * @license https://github.com/pradosoft/prado/blob/master/LICENSE
 * @package Prado\Web\UI\WebControls
 */

namespace Prado\Web\UI\WebControls;

use Prado\Collections\TStack;
use Prado\Exceptions\TConfigurationException;
use Prado\Exceptions\TInvalidOperationException;
use Prado\TPropertyValue;
use Prado\Exceptions\TInvalidDataValueException;

/**
 * Class TWizard.
 *
 * TWizard splits a large form and presents the user with a series of smaller
 * forms to complete. TWizard is analogous to the installation wizard commonly
 * used to install software in Windows.
 *
 * The smaller forms are called wizard steps ({@link TWizardStep}, which can be accessed via
 * {@link getWizardSteps WizardSteps}. In template, wizard steps can be added
 * into a wizard using the following syntax,
 * <code>
 *   <com:TWizard>
 *      <com:TWizardStep Title="step 1">
 *          content in step 1, may contain other controls
 *      </com:TWizardStep>
 *      <com:TWizardStep Title="step 2">
 *          content in step 2, may contain other controls
 *      </com:TWizardStep>
 *   </com:TWizard>
 * </code>
 *
 * Each wizard step can be one of the following types:
 * - Start : the first step in the wizard.
 * - Step : the internal steps in the wizard.
 * - Finish : the last step that allows user interaction.
 * - Complete : the step that shows a summary to user (no interaction is allowed).
 * - Auto : the step type is determined by wizard automatically.
 * At any time, only one step is visible to end-users, which can be obtained
 * by {@link getActiveStep ActiveStep}. Its index in the step collection is given by
 * {@link getActiveStepIndex ActiveStepIndex}.
 *
 * Wizard content can be customized in many ways.
 *
 * The layout of a wizard consists of four parts: header, step content, navigation
 * and side bar. Their content are affected by the following properties, respectively,
 * - header: {@link setHeaderText HeaderText} and {@link setHeaderTemplate HeaderTemplate}.
 *   If both are present, the latter takes precedence.
 * - step: {@link getWizardSteps WizardSteps}.
 * - navigation: {@link setStartNavigationTemplate StartNavigationTemplate},
 *   {@link setStepNavigationTemplate StepNavigationTemplate},
 *   {@link setFinishNavigationTemplate FinishNavigationTemplate}.
 *   Default templates will be used if above templates are not set.
 * - side bar: {@link setSideBarTemplate SideBarTemplate}.
 *   A default template will be used if this template is not set.
 *   Its visibility is toggled by {@link setShowSideBar ShowSideBar}.
 *
 * The style of these wizard layout components can be customized via the following style properties,
 * - header: {@link getHeaderStyle HeaderStyle}.
 * - step: {@link getStepStyle StepStyle}.
 * - navigation: {@link getNavigationStyle NavigationStyle},
 *   {@link getStartNextButtonStyle StartNextButtonStyle},
 *   {@link getStepNextButtonStyle StepNextButtonStyle},
 *   {@link getStepPreviousButtonStyle StepPreviousButtonStyle},
 *   {@link getFinishPreviousButtonStyle FinishPreviousButtonStyle},
 *   {@link getFinishCompleteButtonStyle FinishCompleteButtonStyle},
 *   {@link getCancelButtonStyle CancelButtonStyle}.
 * - side bar: {@link getSideBarStyle SideBarStyle} and {@link getSideBarButtonStyle SideBarButtonStyle}.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @package Prado\Web\UI\WebControls
 * @since 3.0
 */
class TWizard extends \Prado\Web\UI\WebControls\TWebControl implements \Prado\Web\UI\INamingContainer
{
	/**
	 * Navigation commands.
	 */
	const CMD_PREVIOUS = 'PreviousStep';
	const CMD_NEXT = 'NextStep';
	const CMD_CANCEL = 'Cancel';
	const CMD_COMPLETE = 'Complete';
	const CMD_MOVETO = 'MoveTo';
	/**
	 * Side bar button ID
	 */
	const ID_SIDEBAR_BUTTON = 'SideBarButton';
	/**
	 * Side bar data list
	 */
	const ID_SIDEBAR_LIST = 'SideBarList';

	/**
	 * @var TMultiView multiview that contains the wizard steps
	 */
	private $_multiView;
	/**
	 * @var mixed navigation template for the start step.
	 */
	private $_startNavigationTemplate;
	/**
	 * @var mixed navigation template for internal steps.
	 */
	private $_stepNavigationTemplate;
	/**
	 * @var mixed navigation template for the finish step.
	 */
	private $_finishNavigationTemplate;
	/**
	 * @var mixed template for wizard header.
	 */
	private $_headerTemplate;
	/**
	 * @var mixed template for the side bar.
	 */
	private $_sideBarTemplate;
	/**
	 * @var TWizardStepCollection
	 */
	private $_wizardSteps;
	/**
	 * @var TPanel container of the wizard header
	 */
	private $_header;
	/**
	 * @var TPanel container of the wizard step content
	 */
	private $_stepContent;
	/**
	 * @var TPanel container of the wizard side bar
	 */
	private $_sideBar;
	/**
	 * @var TPanel navigation panel
	 */
	private $_navigation;
	/**
	 * @var TWizardNavigationContainer container of the start navigation
	 */
	private $_startNavigation;
	/**
	 * @var TWizardNavigationContainer container of the step navigation
	 */
	private $_stepNavigation;
	/**
	 * @var TWizardNavigationContainer container of the finish navigation
	 */
	private $_finishNavigation;
	/**
	 * @var bool whether ActiveStepIndex was already set
	 */
	private $_activeStepIndexSet = false;
	/**
	 * @var TDataList side bar data list.
	 */
	private $_sideBarDataList;
	/**
	 * @var bool whether navigation should be cancelled (a status set in OnSideBarButtonClick)
	 */
	private $_cancelNavigation = false;

	/**
	 * @return string tag name for the wizard
	 */
	protected function getTagName()
	{
		return 'div';
	}

	/**
	 * Adds {@link TWizardStep} objects into step collection.
	 * This method overrides the parent implementation and is
	 * invoked when template is being instantiated.
	 * @param mixed $object object instantiated in template
	 */
	public function addParsedObject($object)
	{
		if ($object instanceof TWizardStep) {
			$this->getWizardSteps()->add($object);
		}
	}

	/**
	 * @return TWizardStep the currently active wizard step
	 */
	public function getActiveStep()
	{
		return $this->getMultiView()->getActiveView();
	}

	/**
	 * @param TWizardStep $step step to be activated
	 * @throws TInvalidOperationException if the step is not in the wizard step collection
	 */
	public function setActiveStep($step)
	{
		if (($index = $this->getWizardSteps()->indexOf($step)) < 0) {
			throw new TInvalidOperationException('wizard_step_invalid');
		}
		$this->setActiveStepIndex($index);
	}

	/**
	 * @return int the zero-based index of the active wizard step
	 */
	public function getActiveStepIndex()
	{
		return $this->getMultiView()->getActiveViewIndex();
	}

	/**
	 * @param int $value the zero-based index of the wizard step to be activated
	 */
	public function setActiveStepIndex($value)
	{
		$value = TPropertyValue::ensureInteger($value);
		$multiView = $this->getMultiView();
		if ($multiView->getActiveViewIndex() !== $value) {
			$multiView->setActiveViewIndex($value);
			$this->_activeStepIndexSet = true;
			if ($this->_sideBarDataList !== null && $this->getSideBarTemplate() !== null) {
				$this->_sideBarDataList->setSelectedItemIndex($this->getActiveStepIndex());
				$this->_sideBarDataList->dataBind();
			}
		}
	}

	/**
	 * @return TWizardStepCollection collection of wizard steps
	 */
	public function getWizardSteps()
	{
		if ($this->_wizardSteps === null) {
			$this->_wizardSteps = new TWizardStepCollection($this);
		}
		return $this->_wizardSteps;
	}

	/**
	 * @return bool whether to display a cancel button in each wizard step. Defaults to false.
	 */
	public function getShowCancelButton()
	{
		return $this->getViewState('ShowCancelButton', false);
	}

	/**
	 * @param bool $value whether to display a cancel button in each wizard step.
	 */
	public function setShowCancelButton($value)
	{
		$this->setViewState('ShowCancelButton', TPropertyValue::ensureBoolean($value), false);
	}

	/**
	 * @return bool whether to display a side bar that contains links to wizard steps. Defaults to true.
	 */
	public function getShowSideBar()
	{
		return $this->getViewState('ShowSideBar', true);
	}

	/**
	 * @param bool $value whether to display a side bar that contains links to wizard steps.
	 */
	public function setShowSideBar($value)
	{
		$this->setViewState('ShowSideBar', TPropertyValue::ensureBoolean($value), true);
	}

	/**
	 * @return ITemplate navigation template for the start step. Defaults to null.
	 */
	public function getStartNavigationTemplate()
	{
		return $this->_startNavigationTemplate;
	}

	/**
	 * @param ITemplate $value navigation template for the start step.
	 */
	public function setStartNavigationTemplate($value)
	{
		$this->_startNavigationTemplate = $value;
		$this->requiresControlsRecreation();
	}

	/**
	 * @return ITemplate navigation template for internal steps. Defaults to null.
	 */
	public function getStepNavigationTemplate()
	{
		return $this->_stepNavigationTemplate;
	}

	/**
	 * @param ITemplate $value navigation template for internal steps.
	 */
	public function setStepNavigationTemplate($value)
	{
		$this->_stepNavigationTemplate = $value;
		$this->requiresControlsRecreation();
	}

	/**
	 * @return ITemplate navigation template for the finish step. Defaults to null.
	 */
	public function getFinishNavigationTemplate()
	{
		return $this->_finishNavigationTemplate;
	}

	/**
	 * @param ITemplate $value navigation template for the finish step.
	 */
	public function setFinishNavigationTemplate($value)
	{
		$this->_finishNavigationTemplate = $value;
		$this->requiresControlsRecreation();
	}

	/**
	 * @return ITemplate template for wizard header. Defaults to null.
	 */
	public function getHeaderTemplate()
	{
		return $this->_headerTemplate;
	}

	/**
	 * @param ITemplate $value template for wizard header.
	 */
	public function setHeaderTemplate($value)
	{
		$this->_headerTemplate = $value;
		$this->requiresControlsRecreation();
	}

	/**
	 * @return ITemplate template for the side bar. Defaults to null.
	 */
	public function getSideBarTemplate()
	{
		return $this->_sideBarTemplate;
	}

	/**
	 * @param ITemplate $value template for the side bar.
	 */
	public function setSideBarTemplate($value)
	{
		$this->_sideBarTemplate = $value;
		$this->requiresControlsRecreation();
	}

	/**
	 * @return string header text. Defaults to ''.
	 */
	public function getHeaderText()
	{
		return $this->getViewState('HeaderText', '');
	}

	/**
	 * @param string $value header text.
	 */
	public function setHeaderText($value)
	{
		$this->setViewState('HeaderText', TPropertyValue::ensureString($value), '');
	}

	/**
	 * @return string the URL that the browser will be redirected to if the cancel button in the
	 * wizard is clicked. Defaults to ''.
	 */
	public function getCancelDestinationUrl()
	{
		return $this->getViewState('CancelDestinationUrl', '');
	}

	/**
	 * @param string $value the URL that the browser will be redirected to if the cancel button in the
	 * wizard is clicked.
	 */
	public function setCancelDestinationUrl($value)
	{
		$this->setViewState('CancelDestinationUrl', TPropertyValue::ensureString($value), '');
	}

	/**
	 * @return string the URL that the browser will be redirected to if the wizard finishes.
	 * Defaults to ''.
	 */
	public function getFinishDestinationUrl()
	{
		return $this->getViewState('FinishDestinationUrl', '');
	}

	/**
	 * @param string $value the URL that the browser will be redirected to if the wizard finishes.
	 */
	public function setFinishDestinationUrl($value)
	{
		$this->setViewState('FinishDestinationUrl', TPropertyValue::ensureString($value), '');
	}

	/**
	 * @return TStyle the style for the buttons displayed in the side bar.
	 */
	public function getSideBarButtonStyle()

This method seems to be duplicated in your project.

	{
		if (($style = $this->getViewState('SideBarButtonStyle', null)) === null) {
			$style = new TStyle;
			$this->setViewState('SideBarButtonStyle', $style, null);
		}
		return $style;
	}

	/**
	 * @return TStyle the style common for all navigation buttons.
	 */
	public function getNavigationButtonStyle()

This method seems to be duplicated in your project.

	{
		if (($style = $this->getViewState('NavigationButtonStyle', null)) === null) {
			$style = new TStyle;
			$this->setViewState('NavigationButtonStyle', $style, null);
		}
		return $style;
	}

	/**
	 * @return TWizardNavigationButtonStyle the style for the next button in the start wizard step.
	 */
	public function getStartNextButtonStyle()

This method seems to be duplicated in your project.

	{
		if (($style = $this->getViewState('StartNextButtonStyle', null)) === null) {
			$style = new TWizardNavigationButtonStyle;
			$style->setButtonText('Next');
			$this->setViewState('StartNextButtonStyle', $style, null);
		}
		return $style;
	}

	/**
	 * @return TWizardNavigationButtonStyle the style for the next button in each internal wizard step.
	 */
	public function getStepNextButtonStyle()

This method seems to be duplicated in your project.

	{
		if (($style = $this->getViewState('StepNextButtonStyle', null)) === null) {
			$style = new TWizardNavigationButtonStyle;
			$style->setButtonText('Next');
			$this->setViewState('StepNextButtonStyle', $style, null);
		}
		return $style;
	}

	/**
	 * @return TWizardNavigationButtonStyle the style for the previous button in the start wizard step.
	 */
	public function getStepPreviousButtonStyle()

This method seems to be duplicated in your project.

	{
		if (($style = $this->getViewState('StepPreviousButtonStyle', null)) === null) {
			$style = new TWizardNavigationButtonStyle;
			$style->setButtonText('Previous');
			$this->setViewState('StepPreviousButtonStyle', $style, null);
		}
		return $style;
	}

	/**
	 * @return TWizardNavigationButtonStyle the style for the complete button in the finish wizard step.
	 */
	public function getFinishCompleteButtonStyle()

This method seems to be duplicated in your project.

	{
		if (($style = $this->getViewState('FinishCompleteButtonStyle', null)) === null) {
			$style = new TWizardNavigationButtonStyle;
			$style->setButtonText('Complete');
			$this->setViewState('FinishCompleteButtonStyle', $style, null);
		}
		return $style;
	}

	/**
	 * @return TWizardNavigationButtonStyle the style for the previous button in the start wizard step.
	 */
	public function getFinishPreviousButtonStyle()

This method seems to be duplicated in your project.

	{
		if (($style = $this->getViewState('FinishPreviousButtonStyle', null)) === null) {
			$style = new TWizardNavigationButtonStyle;
			$style->setButtonText('Previous');
			$this->setViewState('FinishPreviousButtonStyle', $style, null);
		}
		return $style;
	}

	/**
	 * @return TWizardNavigationButtonStyle the style for the cancel button
	 */
	public function getCancelButtonStyle()

This method seems to be duplicated in your project.

	{
		if (($style = $this->getViewState('CancelButtonStyle', null)) === null) {
			$style = new TWizardNavigationButtonStyle;
			$style->setButtonText('Cancel');
			$this->setViewState('CancelButtonStyle', $style, null);
		}
		return $style;
	}

	/**
	 * @return TPanelStyle the style for the side bar.
	 */
	public function getSideBarStyle()

This method seems to be duplicated in your project.

	{
		if (($style = $this->getViewState('SideBarStyle', null)) === null) {
			$style = new TPanelStyle;
			$this->setViewState('SideBarStyle', $style, null);
		}
		return $style;
	}

	/**
	 * @return TPanelStyle the style for the header.
	 */
	public function getHeaderStyle()

This method seems to be duplicated in your project.

	{
		if (($style = $this->getViewState('HeaderStyle', null)) === null) {
			$style = new TPanelStyle;
			$this->setViewState('HeaderStyle', $style, null);
		}
		return $style;
	}

	/**
	 * @return TPanelStyle the style for each internal wizard step.
	 */
	public function getStepStyle()

This method seems to be duplicated in your project.

	{
		if (($style = $this->getViewState('StepStyle', null)) === null) {
			$style = new TPanelStyle;
			$this->setViewState('StepStyle', $style, null);
		}
		return $style;
	}

	/**
	 * @return TPanelStyle the style for the navigation panel.
	 */
	public function getNavigationStyle()

This method seems to be duplicated in your project.

	{
		if (($style = $this->getViewState('NavigationStyle', null)) === null) {
			$style = new TPanelStyle;
			$this->setViewState('NavigationStyle', $style, null);
		}
		return $style;
	}

	/**
	 * @return bool whether to use default layout to arrange side bar and the rest wizard components. Defaults to true.
	 */
	public function getUseDefaultLayout()
	{
		return $this->getViewState('UseDefaultLayout', true);
	}

	/**
	 * @param bool $value whether to use default layout to arrange side bar and the rest wizard components.
	 * If true, an HTML table will be used which places the side bar in the left cell
	 * while the rest components in the right cell.
	 */
	public function setUseDefaultLayout($value)
	{
		$this->setViewState('UseDefaultLayout', TPropertyValue::ensureBoolean($value), true);
	}

	/**
	 * @return TPanel container of the wizard header
	 */
	public function getHeader()
	{
		return $this->_header;
	}

	/**
	 * @return TPanel container of the wizard step content
	 */
	public function getStepContent()
	{
		return $this->_stepContent;
	}

	/**
	 * @return TPanel container of the wizard side bar
	 */
	public function getSideBar()
	{
		return $this->_sideBar;
	}

	/**
	 * @return TWizardNavigationContainer container of the start navigation
	 */
	public function getStartNavigation()
	{
		return $this->_startNavigation;
	}

	/**
	 * @return TWizardNavigationContainer container of the step navigation
	 */
	public function getStepNavigation()
	{
		return $this->_stepNavigation;
	}

	/**
	 * @return TWizardNavigationContainer container of the finish navigation
	 */
	public function getFinishNavigation()
	{
		return $this->_finishNavigation;
	}

	/**
	 * Raises <b>OnActiveStepChanged</b> event.
	 * This event is raised when the current visible step is changed in the
	 * wizard.
	 * @param TEventParameter $param event parameter
	 */
	public function onActiveStepChanged($param)
	{
		$this->raiseEvent('OnActiveStepChanged', $this, $param);
	}

	/**
	 * Raises <b>OnCancelButtonClick</b> event.
	 * This event is raised when a cancel navigation button is clicked in the
	 * current active step.
	 * @param TEventParameter $param event parameter
	 */
	public function onCancelButtonClick($param)
	{
		$this->raiseEvent('OnCancelButtonClick', $this, $param);
		if (($url = $this->getCancelDestinationUrl()) !== '') {
			$this->getResponse()->redirect($url);
		}
	}

	/**
	 * Raises <b>OnCompleteButtonClick</b> event.
	 * This event is raised when a finish navigation button is clicked in the
	 * current active step.
	 * @param TWizardNavigationEventParameter $param event parameter
	 */
	public function onCompleteButtonClick($param)
	{
		$this->raiseEvent('OnCompleteButtonClick', $this, $param);
		if (($url = $this->getFinishDestinationUrl()) !== '') {
			$this->getResponse()->redirect($url);
		}
	}

	/**
	 * Raises <b>OnNextButtonClick</b> event.
	 * This event is raised when a next navigation button is clicked in the
	 * current active step.
	 * @param TWizardNavigationEventParameter $param event parameter
	 */
	public function onNextButtonClick($param)
	{
		$this->raiseEvent('OnNextButtonClick', $this, $param);
	}

	/**
	 * Raises <b>OnPreviousButtonClick</b> event.
	 * This event is raised when a previous navigation button is clicked in the
	 * current active step.
	 * @param TWizardNavigationEventParameter $param event parameter
	 */
	public function onPreviousButtonClick($param)
	{
		$this->raiseEvent('OnPreviousButtonClick', $this, $param);
	}

	/**
	 * Raises <b>OnSideBarButtonClick</b> event.
	 * This event is raised when a link button in the side bar is clicked.
	 * @param TWizardNavigationEventParameter $param event parameter
	 */
	public function onSideBarButtonClick($param)
	{
		$this->raiseEvent('OnSideBarButtonClick', $this, $param);
	}

	/**
	 * Returns the multiview that holds the wizard steps.
	 * This method should only be used by control developers.
	 * @return TMultiView the multiview holding wizard steps
	 */
	public function getMultiView()
	{
		if ($this->_multiView === null) {
			$this->_multiView = new TMultiView;
			$this->_multiView->setID('WizardMultiView');
			$this->_multiView->attachEventHandler('OnActiveViewChanged', [$this, 'onActiveStepChanged']);
			$this->_multiView->ignoreBubbleEvents();
		}
		return $this->_multiView;
	}

	/**
	 * Adds a wizard step to the multiview.
	 * This method should only be used by control developers.
	 * It is invoked when a step is added into the step collection of the wizard.
	 * @param TWizardStep $step wizard step to be added into multiview.
	 */
	public function addedWizardStep($step)
	{
		if (($wizard = $step->getWizard()) !== null) {
			$wizard->getWizardSteps()->remove($step);
		}
		$step->setWizard($this);
		$this->wizardStepsChanged();
	}

	/**
	 * Removes a wizard step from the multiview.
	 * This method should only be used by control developers.
	 * It is invoked when a step is removed from the step collection of the wizard.
	 * @param TWizardStep $step wizard step to be removed from multiview.
	 */
	public function removedWizardStep($step)
	{
		$step->setWizard(null);
		$this->wizardStepsChanged();
	}

	/**
	 * Creates the child controls of the wizard.
	 * This method overrides the parent implementation.
	 * @param TEventParameter $param event parameter
	 */
	public function onInit($param)
	{
		parent::onInit($param);
		$this->ensureChildControls();
		$this->setEnsureId(true);
		if ($this->getActiveStepIndex() < 0 && $this->getWizardSteps()->getCount() > 0) {
			$this->setActiveStepIndex(0);
		}
	}

	/**
	 * Saves the current active step index into history.
	 * This method is invoked by the framework when the control state is being saved.
	 */
	public function saveState()
	{
		$index = $this->getActiveStepIndex();
		$history = $this->getHistory();
		if (!$history->getCount() || $history->peek() !== $index) {
			$history->push($index);
		}
	}

	/**
	 * Indicates the wizard needs to recreate all child controls.
	 */
	protected function requiresControlsRecreation()
	{
		if ($this->getChildControlsCreated()) {
			$this->setChildControlsCreated(false);
		}
	}

	/**
	 * Renders the wizard.
	 * @param THtmlWriter $writer
	 */
	public function render($writer)
	{
		$this->ensureChildControls();
		if ($this->getHasControls()) {
			if ($this->getUseDefaultLayout()) {
				$this->applyControlProperties();
				$this->renderBeginTag($writer);
				$writer->write("\n<table border=\"0\" cellpadding=\"0\" cellspacing=\"0\" height=\"100%\" width=\"100%\">\n<tr><td width=\"1\" valign=\"top\">\n");
				$this->_sideBar->renderControl($writer);
				$writer->write("\n</td><td valign=\"top\">\n");
				$this->_header->renderControl($writer);
				$this->_stepContent->renderControl($writer);
				$this->_navigation->renderControl($writer);
				$writer->write("\n</td></tr></table>\n");
				$this->renderEndTag($writer);
			} else {
				$this->applyControlProperties();
				$this->renderBeginTag($writer);
				$this->_sideBar->renderControl($writer);
				$this->_header->renderControl($writer);
				$this->_stepContent->renderControl($writer);
				$this->_navigation->renderControl($writer);
				$this->renderEndTag($writer);
			}
		}
	}

	/**
	 * Applies various properties to the components of wizard
	 */
	protected function applyControlProperties()
	{
		$this->applyHeaderProperties();
		$this->applySideBarProperties();
		$this->applyStepContentProperties();
		$this->applyNavigationProperties();
	}

	/**
	 * Applies properties to the wizard header
	 */
	protected function applyHeaderProperties()
	{
		if (($style = $this->getViewState('HeaderStyle', null)) !== null) {
			$this->_header->getStyle()->mergeWith($style);
		}
		if ($this->getHeaderTemplate() === null) {

This code seems to be duplicated across your project.

			$this->_header->getControls()->clear();
			$this->_header->getControls()->add($this->getHeaderText());
		}
	}

	/**
	 * Applies properties to the wizard sidebar
	 */
	protected function applySideBarProperties()
	{
		$this->_sideBar->setVisible($this->getShowSideBar());
		if ($this->_sideBarDataList !== null && $this->getShowSideBar()) {
			$this->_sideBarDataList->setDataSource($this->getWizardSteps());
			$this->_sideBarDataList->setSelectedItemIndex($this->getActiveStepIndex());
			$this->_sideBarDataList->dataBind();
			if (($style = $this->getViewState('SideBarButtonStyle', null)) !== null) {
				foreach ($this->_sideBarDataList->getItems() as $item) {
					if (($button = $item->findControl('SideBarButton')) !== null) {
						$button->getStyle()->mergeWith($style);
					}
				}
			}
		}
		if (($style = $this->getViewState('SideBarStyle', null)) !== null) {
			$this->_sideBar->getStyle()->mergeWith($style);
		}
	}

	/**
	 * Applies properties to the wizard step content
	 */
	protected function applyStepContentProperties()
	{
		if (($style = $this->getViewState('StepStyle', null)) !== null) {
			$this->_stepContent->getStyle()->mergeWith($style);
		}
	}

	/**
	 * Apply properties to various navigation panels.
	 */
	protected function applyNavigationProperties()
	{
		$wizardSteps = $this->getWizardSteps();
		$activeStep = $this->getActiveStep();
		$activeStepIndex = $this->getActiveStepIndex();

		if (!$this->_navigation) {
			return;
		} elseif ($activeStepIndex < 0 || $activeStepIndex >= $wizardSteps->getCount()) {
			$this->_navigation->setVisible(false);
			return;
		}

		// set visibility of different types of navigation panel
		$showStandard = true;
		foreach ($wizardSteps as $step) {
			if (($step instanceof TTemplatedWizardStep) && ($container = $step->getNavigationContainer()) !== null) {
				if ($activeStep === $step) {
					$container->setVisible(true);
					$showStandard = false;
				} else {
					$container->setVisible(false);
				}
			}
		}
		$activeStepType = $this->getStepType($activeStep);
		if ($activeStepType === TWizardStepType::Complete) {
			$this->_sideBar->setVisible(false);
			$this->_header->setVisible(false);
		}
		$this->_startNavigation->setVisible($showStandard && $activeStepType === TWizardStepType::Start);
		$this->_stepNavigation->setVisible($showStandard && $activeStepType === TWizardStepType::Step);
		$this->_finishNavigation->setVisible($showStandard && $activeStepType === TWizardStepType::Finish);

		if (($navigationStyle = $this->getViewState('NavigationStyle', null)) !== null) {
			$this->_navigation->getStyle()->mergeWith($navigationStyle);
		}

		$displayCancelButton = $this->getShowCancelButton();
		$cancelButtonStyle = $this->getCancelButtonStyle();
		$buttonStyle = $this->getViewState('NavigationButtonStyle', null);
		if ($buttonStyle !== null) {
			$cancelButtonStyle->mergeWith($buttonStyle);
		}

		// apply styles to start navigation buttons
		if (($cancelButton = $this->_startNavigation->getCancelButton()) !== null) {
			$cancelButton->setVisible($displayCancelButton);
			$cancelButtonStyle->apply($cancelButton);
		}
		if (($button = $this->_startNavigation->getNextButton()) !== null) {

This code seems to be duplicated across your project.

			$button->setVisible(true);
			$style = $this->getStartNextButtonStyle();
			if ($buttonStyle !== null) {
				$style->mergeWith($buttonStyle);
			}
			$style->apply($button);
			if ($activeStepType === TWizardStepType::Start) {
				$this->getPage()->getClientScript()->registerDefaultButton($this, $button);
			}
		}

		// apply styles to finish navigation buttons
		if (($cancelButton = $this->_finishNavigation->getCancelButton()) !== null) {
			$cancelButton->setVisible($displayCancelButton);
			$cancelButtonStyle->apply($cancelButton);
		}
		if (($button = $this->_finishNavigation->getPreviousButton()) !== null) {

This code seems to be duplicated across your project.

			$button->setVisible($this->allowNavigationToPreviousStep());
			$style = $this->getFinishPreviousButtonStyle();
			if ($buttonStyle !== null) {
				$style->mergeWith($buttonStyle);
			}
			$style->apply($button);
		}
		if (($button = $this->_finishNavigation->getCompleteButton()) !== null) {

This code seems to be duplicated across your project.

			$button->setVisible(true);
			$style = $this->getFinishCompleteButtonStyle();
			if ($buttonStyle !== null) {
				$style->mergeWith($buttonStyle);
			}
			$style->apply($button);
			if ($activeStepType === TWizardStepType::Finish) {
				$this->getPage()->getClientScript()->registerDefaultButton($this, $button);
			}
		}

		// apply styles to step navigation buttons
		if (($cancelButton = $this->_stepNavigation->getCancelButton()) !== null) {
			$cancelButton->setVisible($displayCancelButton);
			$cancelButtonStyle->apply($cancelButton);
		}
		if (($button = $this->_stepNavigation->getPreviousButton()) !== null) {

This code seems to be duplicated across your project.

			$button->setVisible($this->allowNavigationToPreviousStep());
			$style = $this->getStepPreviousButtonStyle();
			if ($buttonStyle !== null) {
				$style->mergeWith($buttonStyle);
			}
			$style->apply($button);
		}
		if (($button = $this->_stepNavigation->getNextButton()) !== null) {

This code seems to be duplicated across your project.

			$button->setVisible(true);
			$style = $this->getStepNextButtonStyle();
			if ($buttonStyle !== null) {
				$style->mergeWith($buttonStyle);
			}
			$style->apply($button);
			if ($activeStepType === TWizardStepType::Step) {
				$this->getPage()->getClientScript()->registerDefaultButton($this, $button);
			}
		}
	}

	/**
	 * @return TStack history containing step indexes that were navigated before
	 */
	protected function getHistory()
	{
		if (($history = $this->getControlState('History', null)) === null) {
			$history = new TStack;
			$this->setControlState('History', $history);
		}
		return $history;
	}

	/**
	 * Determines the type of the specified wizard step.
	 * @param TWizardStep $wizardStep * @return TWizardStepType type of the step
	 */
	protected function getStepType($wizardStep)
	{
		if (($type = $wizardStep->getStepType()) === TWizardStepType::Auto) {
			$steps = $this->getWizardSteps();
			if (($index = $steps->indexOf($wizardStep)) >= 0) {
				$stepCount = $steps->getCount();
				if ($stepCount === 1 || ($index < $stepCount - 1 && $steps->itemAt($index + 1)->getStepType() === TWizardStepType::Complete)) {
					return TWizardStepType::Finish;
				} elseif ($index === 0) {
					return TWizardStepType::Start;
				} elseif ($index === $stepCount - 1) {
					return TWizardStepType::Finish;
				} else {
					return TWizardStepType::Step;
				}
			} else {
				return $type;
			}
		} else {
			return $type;
		}
	}

	/**
	 * Clears up everything within the wizard.
	 */
	protected function reset()
	{
		$this->getControls()->clear();
		$this->_header = null;
		$this->_stepContent = null;
		$this->_sideBar = null;
		$this->_sideBarDataList = null;
		$this->_navigation = null;
		$this->_startNavigation = null;
		$this->_stepNavigation = null;
		$this->_finishNavigation = null;
	}

	/**
	 * Creates child controls within the wizard
	 */
	public function createChildControls()
	{
		$this->reset();
		$this->createSideBar();
		$this->createHeader();
		$this->createStepContent();
		$this->createNavigation();
//		$this->clearChildState();
	}

	/**
	 * Creates the wizard header.
	 */
	protected function createHeader()
	{
		$this->_header = new TPanel;
		if (($template = $this->getHeaderTemplate()) !== null) {

This code seems to be duplicated across your project.

			$template->instantiateIn($this->_header);
		} else {
			$this->_header->getControls()->add($this->getHeaderText());
		}
		$this->getControls()->add($this->_header);
	}

	/**
	 * Creates the wizard side bar
	 */
	protected function createSideBar()
	{
		if ($this->getShowSideBar()) {
			if (($template = $this->getSideBarTemplate()) === null) {
				$template = new TWizardSideBarTemplate;
			}
			$this->_sideBar = new TPanel;
			$template->instantiateIn($this->_sideBar);
			$this->getControls()->add($this->_sideBar);

			if (($this->_sideBarDataList = $this->_sideBar->findControl(self::ID_SIDEBAR_LIST)) !== null) {

It seems like $this->_sideBar->findControl(self::ID_SIDEBAR_LIST) can also be of type object<Prado\Web\UI\TControl>. However, the property $_sideBarDataList is declared as type object<Prado\Web\UI\WebControls\TDataList>. Maybe add an additional type check?

				$this->_sideBarDataList->attachEventHandler('OnItemCommand', [$this, 'dataListItemCommand']);
				$this->_sideBarDataList->attachEventHandler('OnItemDataBound', [$this, 'dataListItemDataBound']);
				$this->_sideBarDataList->setDataSource($this->getWizardSteps());
				$this->_sideBarDataList->setSelectedItemIndex($this->getActiveStepIndex());
				$this->_sideBarDataList->dataBind();
			}
		} else {
			$this->_sideBar = new TPanel;
			$this->getControls()->add($this->_sideBar);
		}
	}

	/**
	 * Event handler for sidebar datalist's OnItemCommand event.
	 * This method is used internally by wizard. It mainly
	 * sets the active step index according to the button clicked in the sidebar.
	 * @param mixed $sender sender of the event
	 * @param TDataListCommandEventParameter $param
	 */
	public function dataListItemCommand($sender, $param)
	{
		$item = $param->getItem();

$item is not used, you could remove the assignment.

		if ($param->getCommandName() === self::CMD_MOVETO) {
			$stepIndex = $this->getActiveStepIndex();
			$newStepIndex = TPropertyValue::ensureInteger($param->getCommandParameter());
			$navParam = new TWizardNavigationEventParameter($stepIndex);
			$navParam->setNextStepIndex($newStepIndex);

			// if the button clicked causes validation which fails,
			// by default we will cancel navigation to the new step
			$button = $param->getCommandSource();
			if (($button instanceof \Prado\Web\UI\IButtonControl) && $button->getCausesValidation() && ($page = $this->getPage()) !== null && !$page->getIsValid()) {

This code seems to be duplicated across your project.

				$navParam->setCancelNavigation(true);
			}

			$this->_activeStepIndexSet = false;
			$this->onSideBarButtonClick($navParam);
			$this->_cancelNavigation = $navParam->getCancelNavigation();
			if (!$this->_cancelNavigation) {
				if (!$this->_activeStepIndexSet && $this->allowNavigationToStep($newStepIndex)) {
					$this->setActiveStepIndex($newStepIndex);
				}
			} else {
				$this->setActiveStepIndex($stepIndex);
			}
		}
	}

	/**
	 * Event handler for sidebar datalist's OnItemDataBound event.
	 * This method is used internally by wizard. It mainly configures
	 * the buttons in the sidebar datalist.
	 * @param mixed $sender sender of the event
	 * @param TDataListItemEventParameter $param
	 */
	public function dataListItemDataBound($sender, $param)
	{
		$item = $param->getItem();
		$itemType = $item->getItemType();
		if ($itemType === 'Item' || $itemType === 'AlternatingItem' || $itemType === 'SelectedItem' || $itemType === 'EditItem') {
			if (($button = $item->findControl(self::ID_SIDEBAR_BUTTON)) !== null) {
				$step = $item->getData();
				if (($this->getStepType($step) === TWizardStepType::Complete)) {
					$button->setEnabled(false);
				}
				if (($title = $step->getTitle()) !== '') {
					$button->setText($title);
				} else {
					$button->setText($step->getID(false));
				}
				$index = $this->getWizardSteps()->indexOf($step);
				$button->setCommandName(self::CMD_MOVETO);
				$button->setCommandParameter("$index");
			}
		}
	}

	/**
	 * Creates wizard step content.
	 */
	protected function createStepContent()
	{
		foreach ($this->getWizardSteps() as $step) {
			if ($step instanceof TTemplatedWizardStep) {
				$step->ensureChildControls();
			}
		}
		$multiView = $this->getMultiView();
		$this->_stepContent = new TPanel;
		$this->_stepContent->getControls()->add($multiView);
		$this->getControls()->add($this->_stepContent);
		if ($multiView->getViews()->getCount()) {
			$multiView->setActiveViewIndex(0);
		}
	}

	/**
	 * Creates navigation panel.
	 */
	protected function createNavigation()
	{
		$this->_navigation = new TPanel;
		$this->getControls()->add($this->_navigation);
		$controls = $this->_navigation->getControls();
		foreach ($this->getWizardSteps() as $step) {
			if ($step instanceof TTemplatedWizardStep) {
				$step->instantiateNavigationTemplate();
				if (($panel = $step->getNavigationContainer()) !== null) {
					$controls->add($panel);
				}
			}
		}
		$this->_startNavigation = $this->createStartNavigation();
		$controls->add($this->_startNavigation);
		$this->_stepNavigation = $this->createStepNavigation();
		$controls->add($this->_stepNavigation);
		$this->_finishNavigation = $this->createFinishNavigation();
		$controls->add($this->_finishNavigation);
	}

	/**
	 * Creates start navigation panel.
	 */
	protected function createStartNavigation()

This method seems to be duplicated in your project.

	{
		if (($template = $this->getStartNavigationTemplate()) === null) {
			$template = new TWizardStartNavigationTemplate($this);
		}
		$navigation = new TWizardNavigationContainer;
		$template->instantiateIn($navigation);
		return $navigation;
	}

	/**
	 * Creates step navigation panel.
	 */
	protected function createStepNavigation()

This method seems to be duplicated in your project.

	{
		if (($template = $this->getStepNavigationTemplate()) === null) {
			$template = new TWizardStepNavigationTemplate($this);
		}
		$navigation = new TWizardNavigationContainer;
		$template->instantiateIn($navigation);
		return $navigation;
	}

	/**
	 * Creates finish navigation panel.
	 */
	protected function createFinishNavigation()

This method seems to be duplicated in your project.

	{
		if (($template = $this->getFinishNavigationTemplate()) === null) {
			$template = new TWizardFinishNavigationTemplate($this);
		}
		$navigation = new TWizardNavigationContainer;
		$template->instantiateIn($navigation);
		return $navigation;
	}

	/**
	 * Updates the sidebar datalist if any.
	 * This method is invoked when any wizard step is changed.
	 */
	public function wizardStepsChanged()
	{
		if ($this->_sideBarDataList !== null) {
			$this->_sideBarDataList->setDataSource($this->getWizardSteps());
			$this->_sideBarDataList->setSelectedItemIndex($this->getActiveStepIndex());
			$this->_sideBarDataList->dataBind();
		}
	}

	/**
	 * Determines the index of the previous step based on history.
	 * @param bool $popStack whether the first item in the history stack should be popped
	 * up after calling this method.
	 */
	protected function getPreviousStepIndex($popStack)
	{
		$history = $this->getHistory();
		if ($history->getCount() >= 0) {
			$activeStepIndex = $this->getActiveStepIndex();
			$previousStepIndex = -1;

$previousStepIndex is not used, you could remove the assignment.

			if ($popStack) {
				$previousStepIndex = $history->pop();
				if ($activeStepIndex === $previousStepIndex && $history->getCount() > 0) {
					$previousStepIndex = $history->pop();
				}
			} else {
				$previousStepIndex = $history->peek();
				if ($activeStepIndex === $previousStepIndex && $history->getCount() > 1) {
					$saveIndex = $history->pop();
					$previousStepIndex = $history->peek();
					$history->push($saveIndex);
				}
			}
			return $activeStepIndex === $previousStepIndex ? -1 : $previousStepIndex;
		} else {
			return -1;
		}
	}

	/**
	 * @return bool whether navigation to the previous step is allowed
	 */
	protected function allowNavigationToPreviousStep()
	{
		if (($index = $this->getPreviousStepIndex(false)) !== -1) {
			return $this->getWizardSteps()->itemAt($index)->getAllowReturn();
		} else {
			return false;
		}
	}

	/**
	 * @param int $index index of the step
	 * @return bool whether navigation to the specified step is allowed
	 */
	protected function allowNavigationToStep($index)
	{
		if ($this->getHistory()->contains($index)) {
			return $this->getWizardSteps()->itemAt($index)->getAllowReturn();
		} else {
			return true;
		}
	}

	/**
	 * Handles bubbled events.
	 * This method mainly translate certain command events into
	 * wizard-specific events.
	 * @param mixed $sender sender of the original command event
	 * @param TEventParameter $param event parameter
	 * @throws TInvalidDataValueException if a navigation command is associated with an invalid parameter
	 */
	public function bubbleEvent($sender, $param)
	{
		if ($param instanceof \Prado\Web\UI\TCommandEventParameter) {
			$command = $param->getCommandName();
			if (strcasecmp($command, self::CMD_CANCEL) === 0) {
				$this->onCancelButtonClick($param);
				return true;
			}

			$type = $this->getStepType($this->getActiveStep());
			$index = $this->getActiveStepIndex();
			$navParam = new TWizardNavigationEventParameter($index);
			if (($sender instanceof \Prado\Web\UI\IButtonControl) && $sender->getCausesValidation() && ($page = $this->getPage()) !== null && !$page->getIsValid()) {

This code seems to be duplicated across your project.

				$navParam->setCancelNavigation(true);
			}

			$handled = false;
			$movePrev = false;
			$this->_activeStepIndexSet = false;

			if (strcasecmp($command, self::CMD_NEXT) === 0) {
				if ($type !== TWizardStepType::Start && $type !== TWizardStepType::Step) {

This code seems to be duplicated across your project.

					throw new TInvalidDataValueException('wizard_command_invalid', self::CMD_NEXT);
				}
				if ($index < $this->getWizardSteps()->getCount() - 1) {
					$navParam->setNextStepIndex($index + 1);
				}
				$this->onNextButtonClick($navParam);
				$handled = true;
			} elseif (strcasecmp($command, self::CMD_PREVIOUS) === 0) {
				if ($type !== TWizardStepType::Finish && $type !== TWizardStepType::Step) {

This code seems to be duplicated across your project.

					throw new TInvalidDataValueException('wizard_command_invalid', self::CMD_PREVIOUS);
				}
				$movePrev = true;
				if (($prevIndex = $this->getPreviousStepIndex(false)) >= 0) {
					$navParam->setNextStepIndex($prevIndex);
				}
				$this->onPreviousButtonClick($navParam);
				$handled = true;
			} elseif (strcasecmp($command, self::CMD_COMPLETE) === 0) {
				if ($type !== TWizardStepType::Finish) {
					throw new TInvalidDataValueException('wizard_command_invalid', self::CMD_COMPLETE);
				}
				if ($index < $this->getWizardSteps()->getCount() - 1) {
					$navParam->setNextStepIndex($index + 1);
				}
				$this->onCompleteButtonClick($navParam);
				$handled = true;
			} elseif (strcasecmp($command, self::CMD_MOVETO) === 0) {
				if ($this->_cancelNavigation) {  // may be set in onSideBarButtonClick
					$navParam->setCancelNavigation(true);
				}
				$requestedStep = $param->getCommandParameter();
				if (!is_numeric($requestedStep)) {
					$requestedIndex = -1;
					foreach ($this->getWizardSteps() as $index => $step) {
						if ($step->getId() === $requestedStep) {
							$requestedIndex = $index;
							break;
						}
					}
					if ($requestedIndex < 0) {
						throw new TConfigurationException('wizard_step_invalid');
					}
				} else {
					$requestedIndex = TPropertyValue::ensureInteger($requestedStep);
				}
				$navParam->setNextStepIndex($requestedIndex);
				$handled = true;
			}

			if ($handled) {
				if (!$navParam->getCancelNavigation()) {
					$nextStepIndex = $navParam->getNextStepIndex();
					if (!$this->_activeStepIndexSet && $this->allowNavigationToStep($nextStepIndex)) {
						if ($movePrev) {
							$this->getPreviousStepIndex(true);
						}  // pop out the previous move from history
						$this->setActiveStepIndex($nextStepIndex);
					}
				} else {
					$this->setActiveStepIndex($index);
				}
				return true;
			}
		}
		return false;
	}
}