Package org.opencms.ade.galleries.client.ui

Class CmsResultsBackwardsScrollHandler

java.lang.Object
org.opencms.ade.galleries.client.ui.CmsResultsBackwardsScrollHandler
All Implemented Interfaces:
com.google.gwt.event.dom.client.ScrollHandler, com.google.gwt.event.shared.EventHandler
public class CmsResultsBackwardsScrollHandler extends Object implements com.google.gwt.event.dom.client.ScrollHandler
Scroll handler class which loads more items in the front of the search result list when the user scrolls to the top.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    protected boolean
    m_enabled
    Flag used to temporarily disable the scroll handler.
    protected int
    m_firstShownPage
    The index of the first shown page.
    protected int
    m_pageSize
    The number of results per page.
    protected List<org.opencms.ade.galleries.shared.CmsResultItemBean>
    m_resultBeans
    The list of search result beans.
    protected CmsResultsTab
    m_resultsTab
    The search results tab.
    protected org.opencms.ade.galleries.shared.CmsGallerySearchBean
    m_searchBean
    The search bean.
    static final int
    SCROLL_THRESHOLD
    The scroll threshold in pixels.

  • Constructor Summary

    Constructors
    Constructor
    Description
    CmsResultsBackwardsScrollHandler(CmsResultsTab resultsTab)
    Creates a new handler instance for a given results tab.

  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    hasMore()
    Checks whether more items can be loaded at the front of the list.
    protected void
    loadPage(int pageNum)
    Loads a page with a given index.
    protected void
    loadPreviousPage()
    Loads the page before the first shown page.
    void
    onScroll(com.google.gwt.event.dom.client.ScrollEvent event)
     
    void
    updateSearchBean(org.opencms.ade.galleries.shared.CmsGallerySearchBean searchBean)
    Updates the handler with a new search bean.

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Field Details

    • SCROLL_THRESHOLD

      public static final int SCROLL_THRESHOLD
      The scroll threshold in pixels.
      See Also:

    • m_enabled

      protected boolean m_enabled
      Flag used to temporarily disable the scroll handler.

    • m_firstShownPage

      protected int m_firstShownPage
      The index of the first shown page.

    • m_pageSize

      protected int m_pageSize
      The number of results per page.

    • m_resultBeans

      protected List<org.opencms.ade.galleries.shared.CmsResultItemBean> m_resultBeans
      The list of search result beans.

    • m_resultsTab

      protected CmsResultsTab m_resultsTab
      The search results tab.

    • m_searchBean

      protected org.opencms.ade.galleries.shared.CmsGallerySearchBean m_searchBean
      The search bean.

  • Constructor Details

    • CmsResultsBackwardsScrollHandler

      public CmsResultsBackwardsScrollHandler(CmsResultsTab resultsTab)
      Creates a new handler instance for a given results tab.

      Parameters:
      resultsTab - the results tab for which to create the handler

  • Method Details

    • hasMore

      public boolean hasMore()
      Checks whether more items can be loaded at the front of the list.

      Returns:
      true if more items can be loaded at the front of the list

    • onScroll

      public void onScroll(com.google.gwt.event.dom.client.ScrollEvent event)
      Specified by:
      onScroll in interface com.google.gwt.event.dom.client.ScrollHandler
      See Also:
      • ScrollHandler.onScroll(com.google.gwt.event.dom.client.ScrollEvent)

    • updateSearchBean

      public void updateSearchBean(org.opencms.ade.galleries.shared.CmsGallerySearchBean searchBean)
      Updates the handler with a new search bean.

      Parameters:
      searchBean - the search bean

    • loadPage

      protected void loadPage(int pageNum)
      Loads a page with a given index.

      Parameters:
      pageNum - the index of the page to load

    • loadPreviousPage

      protected void loadPreviousPage()
      Loads the page before the first shown page.