Difference between revisions of "Menu theme development guide"
(added note about where to find default mainmenu.xml file)
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* SHUTDOWN - Shutdown myth
* SHUTDOWN - Shutdown myth
* JUMP - ???
* JUMP - ???
Revision as of 13:49, 24 April 2006
- 1 Introduction
- 2 Overview
- 3 First Step
- 4 Creating a Main Menu
- 5 Buttons
- 6 More Menus
- 7 Putting it all together
- 8 Helpful Tips
- 9 Appendix A: Types
- 10 Appendix B: Actions
Menu themes allow the user to customize where certain myth features are located. By creating a customized menu theme, users can tailor MythTV to their own usage. The goal of this guide is to familiarize users with the menu's XML format and to create a comprehensive list of actions that will allow the user to invoke plugins and other menus. This document assumes that mythtv is installed in the "/usr" directory. If it is installed in the "/usr/local" directory, substitute everywhere that says "/usr/" with "/usr/local/".
Menu themes are a series of XML documents. The XML document defines what "buttons" are shown on each menu. Each XML document describes one menu.
The first step is to create a directory to hold the menu's XML document. If unsure, a good place is in the home folder. The directory can be called anything that is not already a theme of any kind. To find out what not to call the menu theme, use the following command in a terminal:
$ ls /usr/share/mythtv/themes
Type the following to create a directory for a menutheme in "~/mymenuthemes/mymenu".
$ cd ~ $ mkdir mymenuthemes $ cd mymenuthemes $ mkdir mymenu $ cd mymenu
It is generally a good idea to sketch out how the new menu is to be laid out. This will decrease the chance of error as well as speed up the development process.
Creating a Main Menu
To create the main menu, create a new document called "mainmenu.xml" For example, this command can be typed at the terminal:
$ gedit mainmenu.xml
Alternatively, you can copy the default menu theme to use as a template for creating your theme:
$ cp /usr/share/mythtv/mainmenu.xml .
The first line of the document will always be
After the mythmenu tag, one or more button tags will define the buttons shown on the screen. Finally, the document will end with
A button defines what text appears on the screen and what action will be taken when the user selects the button.
<button> <type>SOME_TYPE</type> <text>My Text</text> <text lang="XX">My Text in XX</text> <action>SOME_TYPE_ACTION</action> <depends>myplugin</depends> </button>
Below is a description of each tag
- <type> This tag defines what kind of button this is. This will determine what picture is shown when the button is highlighted. A list of known types can be found in Appendix A: Types.
- <text> The default text that appears on the screen. This is generally written in English.
- <text lang="XX"> Text that will appear if the user's local is XX. There may be more than one of these tags
- <action> The action that will result when the user selects the button. A complete list of known actions can be found in Appendix B: Actions
- <depends> Indicates that the button will only be shown if the indicated plugin is installed
One menu is usually not enough. To organize things, other menus can be created. A new menu will be an xml document of any name. New menus also start out with the tag <mythmenu name="NAME">. Replace "NAME" with an identifier of choice. Remember that the xml document must end with </mythmenu>.
Linking to another Menu
To link to another menu, create a button that looks like this:
<button> <type>MENU_TYPE</type> <text>Go to another Menu</text> <text lang="XX">Ogay otay notheray enumay</text> <action>MENU newmenu.xml</action> </button>
Putting it all together
After all of the xml files have been created, simply (as root) copy the folder into your mythtv installation themes folder. This will usually be in /usr/share/mythtv/themes. After that, run mythfrontend.
/home/you/mymenuthemes/mymenu$ su /home/you/mymenuthemes/mymenu# cd .. /home/you/mymenuthemes# cp -r mymenu /usr/share/mythtv/themes /home/you/mymenuthemes# exit /home/you/mymenuthemes$ mythfrontend
To activate the new theme, go to the appearance settings in mythfrontend and select the new theme. Remember, if you want to switch back to another theme, your theme has to have a link somewhere to the appearace settings (SETTINGS APPEARANCE).
Sometimes there is an action that is desired, but not quite possible. For example, one cannot call mythdvd to do the action DVD_PLAY from the main menu. The action could be hardcoded into the menu itself. For example, a button can be written like so:
<button> <type>DVD</type> <text>Watch DVD</text> <action>EXEC xine --fullscreen dvd:/</action> <depends>mythdvd</depends> </button>
This should probably only be used on a personal level since another user may not have the custom program.
Appendix A: Types
Other graphical theme writers may include other types in their themes. These types are the ones referenced to in the default theme.
Appendix B: Actions
- TV_STATUS - Status of the myth backend
- TV_WATCH_RECORDING - Go to the watch recording screen
- TV_WATCH_LIVE - Watch live TV
- TV_SET_RECPRIORITIES - View/Set Recording Priorities
- TV_FIX_CONFLICTS - Show upcoming recordings and conflicts
- TV_DELETE - Go to delete recordings screen
- TV_PREVIOUS - Show previously recorded shows
- TV_SCHEDULE - Schedule a recording
- TV_PROGFIND - Go to program finder
- TV_MANUAL - Does an "Instant Recording"... Doesn't seem to work
- TV_CUSTOM_RECORD - Allow user to set a custom recording
- TV_MANUALSCHEDULE - Manually record a show
- TV_SEARCH_TITLE - Search for program by title
- TV_SEARCH_KEYWORD - Search for program by keyword
- TV_SEARCH_PEOPLE - Search for program by people
- TV_SEARCH_POWER - Advance Search
- TV_SEARCH_NEW - Search for new programs
- TV_SEARCH_MOVIE - Search for movies
- TV_SEARCH_CATEGORY - Search by category
- TV_SEARCH_CHANNEL - Search within a channel
- TV_SEARCH_TIME - Search within a time
Please note the space between SETTINGS and its argument
- SETTINGS MAINGENERAL - Main settings
- SETTINGS APPEARANCE - Appearance Settings
- SETTINGS XBOXSETTINGS - XBox Settings
- SETTINGS GENERALRECPRIORITIES - Recording priority settings
- SETTINGS CHANNELRECPRIORITIES - Channel recording priority
- SETTINGS EPG - Electronic Program Guide settings
- SETTINGS PLAYBACK - Playback settings
- SETTINGS RECORDING - Recording settings
- SETTINGS PLAYGROUP - ?
- SETTINGS GENERAL - ?
- EXEC someprogram - Executes a specified program
- Example: EXEC xine --fullscreen --no-splash dvd:/
- EXECTV someprogram %s %s %s - Executes a TV program. %s args are video, audio, and vbi devices
- Example: EXECTV xawtv -f -device %s -dspdev %s -vbidev %s
- MENU somemenu.xml - Jump to a new menu
- Example: MENU settings.xml
- UPMENU - Go to parent menu
- CONFIGPLUGIN myplugin - Configure a plugin
- Example: CONFIGPLUGIN mythdvd
- PLUGIN myplugin - Activate a plugin
- Example: PLUGIN mythdvd
- SHUTDOWN - Shutdown myth
- JUMP - ???