org.zkoss.zkplus.theme
Class StandardThemeProvider

java.lang.Object
  org.zkoss.zkplus.theme.StandardThemeProvider

All Implemented Interfaces:

ThemeProvider

public class StandardThemeProvider
extends java.lang.Object
implements ThemeProvider

A standard implementation of ThemeProvider, which works with the Breeze series themes.

Author:

simonpai

Nested Class Summary

Nested classes/interfaces inherited from interface org.zkoss.zk.ui.util.ThemeProvider

ThemeProvider.Aide

Field Summary

static java.lang.String

DEFAULT_WCS

Constructor Summary

StandardThemeProvider()

Method Summary

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.

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_WCS

public static final java.lang.String DEFAULT_WCS

See Also:

Constant Field Values

Constructor Detail

StandardThemeProvider

public StandardThemeProvider()

Method Detail

getThemeURIs

public java.util.Collection<java.lang.Object> getThemeURIs(Execution exec,
                                                           java.util.List<java.lang.Object> uris)

Description copied from interface: ThemeProvider

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.

Specified by:

getThemeURIs in interface ThemeProvider

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

public int getWCSCacheControl(Execution exec,
                              java.lang.String uri)

Description copied from interface: ThemeProvider

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.

Specified by:

getWCSCacheControl in interface ThemeProvider

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 nonpostive number.

beforeWCS

public java.lang.String beforeWCS(Execution exec,
                                  java.lang.String uri)

Description copied from interface: ThemeProvider

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;
}

Specified by:

beforeWCS in interface ThemeProvider

Parameters:

exec - the current executioin (never null), where you can retrieve the request ad responsne. However, unlike ThemeProvider.getThemeURIs(org.zkoss.zk.ui.Execution, java.util.List), 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.

beforeWidgetCSS

public java.lang.String beforeWidgetCSS(Execution exec,
                                        java.lang.String uri)

Description copied from interface: ThemeProvider

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 overriden 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;
}

Specified by:

beforeWidgetCSS in interface ThemeProvider

Parameters:

exec - the current executioin (never null), where you can retrieve the request ad responsne. However, unlike ThemeProvider.getThemeURIs(org.zkoss.zk.ui.Execution, java.util.List), 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.