Interface ThemeProvider

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Interface Description
      static class  ThemeProvider.Aide
      Utilities to help the implementation of ThemeProvider to manipulate the URI such that it is able to use a different URI for a different theme.
    • Method Summary

      All Methods Instance Methods Abstract Methods 
      Modifier and Type Method Description
      java.lang.String beforeWCS​(Execution exec, java.lang.String uri)
      Called when a WCS (Widget CSS descriptor) file is about to be loaded.
      java.lang.String beforeWidgetCSS​(Execution exec, java.lang.String uri)
      Called when a WCS (Widget CSS descriptor) file is about to load the CSS file associated with a widget.
      java.util.Collection<java.lang.Object> getThemeURIs​(Execution exec, java.util.List<java.lang.Object> uris)
      Returns a list of the theme's URIs of the specified execution, or null if no theme shall be generated.
      int getWCSCacheControl​(Execution exec, java.lang.String uri)
      Returns the number of hours that the specified WCS (Widget CSS descriptor) file won't be changed.
    • Method Detail

      • getThemeURIs

        java.util.Collection<java.lang.Object> getThemeURIs​(Execution exec,
                                                            java.util.List<java.lang.Object> uris)
        Returns a list of the theme's URIs of the specified execution, or null if no theme shall be generated. Each item could be an instance of either String or StyleSheet. If you want to specify the media attribute, use StyleSheet.

        It is called when a desktop is about to be rendered. It is called only once for each desktop.

        Notice that StyleSheet is allowed since 5.0.3.

        Parameters:
        exec - the current execution (never null), where you can retrieve the desktop, request and response. Note: if your Web application supports multiple devices, you have to check Desktop.getDevice().
        uris - the default set of theme's URIs, i.e., the themes defined in language definitions (lang.xml and lang-addon.xml) and the configuration (the theme-uri elements in web.xml). Each URI is an instance of of either String or StyleSheet. Notice that, unless it is customized by application specific lang-addon, all URIs are, by default, String instances.
        Returns:
        the collection of the theme's URIs that the current desktop shall use. Each URI is an instance of of either String or StyleSheet.
      • getWCSCacheControl

        int getWCSCacheControl​(Execution exec,
                               java.lang.String uri)
        Returns the number of hours that the specified WCS (Widget CSS descriptor) file won't be changed. In other words, the client is allowed to cache the file until the returned hours expires.
        Parameters:
        uri - the URI of the WCS file, e.g., ~./zul/css/zk.wcs
        Returns:
        number of hours that the WCS file is allowed to cache. If it is never changed until next ZK upgrade, you could return 8760 (the default if ThemeProvider is not specified). If you don't want the client to cache, return a non-positive number.
      • beforeWCS

        java.lang.String beforeWCS​(Execution exec,
                                   java.lang.String uri)
        Called when a WCS (Widget CSS descriptor) file is about to be loaded. This method then returns the real URI of the WCS file to load. If no need to change, just return the uri parameter.

        If you want to change the font size, you can set the attributes of the execution accordingly as follows.

        fontSizeM
        The default font size. Default: 12px
        fontSizeMS
        The font size for menus. Default: 11px
        fontSizeS
        The font size for smaller fonts, such as toolbar. Default: 11px
        fontSizeXS
        The font size for extreme small fonts. Default 10px
        fontFamilyT
        The font family for titles. Default: arial, sans-serif
        fontFamilyC
        The font family for content. Default: arial, sans-serif

        For example,

        String beforeWCS(Execution exec, String uri) {
          exec.setAttribute("fontSizeM", "15px");
          return uri;
        }
        Parameters:
        exec - the current execution (never null), where you can retrieve the request and response. However, unlike getThemeURIs(org.zkoss.zk.ui.Execution, java.util.List<java.lang.Object>), the desktop might not be available when this method is called.
        uri - the URI of the WCS file, e.g., ~./zul/css/zk.wcs
        Returns:
        the real URI of the WCS file to load. If null is returned, the WCS file is ignored.
        Since:
        5.0.0
      • beforeWidgetCSS

        java.lang.String beforeWidgetCSS​(Execution exec,
                                         java.lang.String uri)
        Called when a WCS (Widget CSS descriptor) file is about to load the CSS file associated with a widget. This method then returns the real URI of the WCS file to load. If no need to change, just return the uri parameter.

        This method is usually overridden to load the CSS files from a different directory. For example,

        String beforeWidgetCSS(Execution exec, String uri) {
          return uri.startsWith("~./") ? "~./foo/" + uri.substring(3): uri;
        }
        Parameters:
        exec - the current execution (never null), where you can retrieve the request ad response. However, unlike getThemeURIs(org.zkoss.zk.ui.Execution, java.util.List<java.lang.Object>), the desktop might not be available when this method is called.
        uri - the URI of the CSS file associated with a widget, e.g., ~./js/zul/wgt/css/a.css.dsp
        Returns:
        the real URI of the CSS file to load If null is returned, the CSS file is ignored.
        Since:
        5.0.0