Difference between revisions of "Virtual Keyboard"

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Virtual Keyboard (view source)

Revision as of 00:02, 12 November 2008

4,262 bytes added ,  00:02, 12 November 2008
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(typos, use xml syntax highlighting)
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'''WIP'''
'''''WIP'''''


The new ScummVM virtual keyboard hopes to provide a generalized implementation
The new ScummVM virtual keyboard hopes to provide a generalized implementation
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* fully draggable
* fully draggable


== Creating a keyboard pack ==
== Information for keyboard pack creators ==
 
'''''TODO: start by explaining all the different types of buttons needed for the bitmaps'''''


In order to create a keyboard pack there are two main stages: creating the bitmaps, and, writing the XML configuration file.
In order to create a keyboard pack there are two main stages: creating the bitmaps, and, writing the XML configuration file.
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=== XML configuration file ===
=== XML configuration file ===


The first step in creating the XML configuration file is to create the HTML imagemap data. The easiest way to do this is by using an standard image map creation tool such as GIMP's Image Map plugin (find it under Filters -> Web -> Image Map...).  
The first step in creating the XML configuration file is to create the HTML imagemap data. The easiest way to do this is by using an standard image map creation tool such as GIMP's Image Map plugin (find it under Filters -> Web -> Image Map...). You will need to do this for each bitmap, ensuring that you define areas for all the clickable areas (and the display box). Also ensure that you only use rectangle or polygon map areas, currently circle areas are not supported.
 
After creating all the image maps you should put the exported HTML for all the bitmaps into a single XML file. Then you can start adding the rest of the configuration XML around it. The rest of this section provides descriptions of the tags and example complete file.
 
==== Tag descriptions ====
 
'''''TODO: format table properly'''''
{|
| Tag
| Description
| Required attributes
| Optional attributes
| Children
|-
| <keyboard>
| This is the required, root element of the file format.
| initial_mode: name of the mode the keyboard will show initially.
| v_align/h_align: where on the screen should the keyboard appear initially (defaults to bottom/center).
| mode
|-
| <mode>
| This tag encapsulates a single mode of the keyboard. Within are a number of
layouts, which provide the specific implementation at different resolutions.
| name: the name of the mode
resolutions: list of the different layout resolutions
| layout
event
|-
| <event>
| These tags describe a particular event that will be triggered by a mouse click
on a particular area. The target attribute of each image map area should be the
same as an event's name.
| name: name of the event
type: key | modifier | switch_mode | submit | cancel | clear | delete | move_left | move_right - see VirtualKeyboard::EventType for explanation
 
for key events
code / ascii: describe a key press in ScummVM KeyState format
 
for key and modifier events
modifiers: modifier keystate as comma-separated list of shift, ctrl and/or alt.
 
for switch_mode events
mode: name of the mode that should be switched to
|
|
|-
| <layout>
| These tags encapsulate an implementation of a mode at a particular resolution.
| resolution: the screen resolution that this layout is designed for
bitmap: filename of the 24-bit bitmap that will be used for this layout
| transparent_color: color in r,g,b format that will be used for keycolor transparency (defaults to (255,0,255).
display_font_color: color in r,g,b format that will be used for the text of the keyboard display (defaults to (0,0,0).
| map: this describes the image map using the same format as html image maps
|-
| <map>
| These tags describe the image map for a particular layout. It uses the same
format as HTML image maps. The only area shapes that are supported are
rectangles and polygons. The target attribute of each area should be the name
of an event for this mode (see <event> tag). They will usually be generated by
an external tool such as GIMP's Image Map plugin, and so will not be written
by hand, but for more information on HTML image map format see W3Schools pages on the [http://www.w3schools.com/TAGS/tag_map.asp <map>] and [http://www.w3schools.com/TAGS/tag_area.asp <area>] tags.
|
|
|
|}


==== Example configuration file ====
==== Example configuration file ====
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         <area shape="poly" coords="105,50,107,48,134,48,136,50,136,77,134,79,107,79,105,77" target="w" />
         <area shape="poly" coords="105,50,107,48,134,48,136,50,136,77,134,79,107,79,105,77" target="w" />
         <area shape="poly" coords="146,50,148,48,174,48,176,50,176,77,174,79,148,79,146,77" target="e" />
         <area shape="poly" coords="146,50,148,48,174,48,176,50,176,77,174,79,148,79,146,77" target="e" />
...
        ...
         <area shape="poly" coords="11,89,12,88,69,88,70,89,70,116,69,117,12,117,11,116" target="caps" />
         <area shape="poly" coords="11,89,12,88,69,88,70,89,70,116,69,117,12,117,11,116" target="caps" />
       </map>
       </map>
</layout>
    </layout>
<layout resolution="320x200" bitmap="normal_320x200.bmp" transparent_color="255,0,255">
    <layout resolution="320x200" bitmap="normal_320x200.bmp" transparent_color="255,0,255">
  ...
      ...
</layout>
    </layout>
     <event name="a" type="key" code="97" ascii="97" modifiers="" />
     <event name="a" type="key" code="97" ascii="97" modifiers="" />
     <event name="b" type="key" code="98" ascii="98" modifiers="" />
     <event name="b" type="key" code="98" ascii="98" modifiers="" />
     <event name="c" type="key" code="99" ascii="99" modifiers="" />
     <event name="c" type="key" code="99" ascii="99" modifiers="" />
...
    ...
<event name="caps" type="switch_mode" mode="caps" />
    <event name="caps" type="switch_mode" mode="caps" />
   </mode>
   </mode>


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       <map>
       <map>
         <area shape="poly" coords="65,50,67,48,94,48,96,50,96,77,94,79,67,79,65,77" target="Q" />
         <area shape="poly" coords="65,50,67,48,94,48,96,50,96,77,94,79,67,79,65,77" target="Q" />
...
        ...
       </map>
       </map>
     </layout>
     </layout>
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     <event name="B" type="key" code="98" ascii="66" modifiers="shift" />
     <event name="B" type="key" code="98" ascii="66" modifiers="shift" />
     <event name="C" type="key" code="99" ascii="67" modifiers="shift" />
     <event name="C" type="key" code="99" ascii="67" modifiers="shift" />
...
    ...
   </mode>
   </mode>
</keyboard>
</keyboard>
</syntax>
</syntax>


=== Inclusion in build ===
== Information for porters ==
 
By default the virtual keyboard code is disabled from a ScummVM build. In order to enable it use the '''--enable-vkeybd''' flag when running the configure script.
 
After you have enabled the virtual keyboard in a build the loading code must be provided with a path to find the keyboard pack(s), and the name of the keyboard pack to use. For the path the loading code uses the value of the''' 'vkeybdpath' '''config file variable if it is defined. If it is not defined it will revert to the 'extrapath' variable. Likewise, if that is not defined it defaults to the current directory.
 
For the name of the keyboard pack, the loading code uses the''' 'vkeybd_pack_name' '''variable if defined, if not it defaults to using 'vkeybd' for the pack name.


By default the virtual keyboard is disabled from a ScummVM build. In order to enable it use the --enable-vkeybd flag when running configure.
Once the keyboard pack path and name are defined the loading code looks for a valid keyboard pack. First it looks for an uncompressed pack by looking for a file with the name ''[packname]''.xml in the keyboard pack directory. If it does not find this it will look for a compressed pack by looking for a file with the name ''[packname]''.zip.  


=== Using the keyboard ===
''Maybe the loading process should be simplified to use a single path variable that could point to a single xml or zip file (the facility for naming a pack was meant to allow switching between packs at runtime, but this is probably not required)''


defining keyboard pack path / name of keyboard
== Information for users ==


in game:
'''''TODO'''''
pauses system
pauses system
preview area
preview area
Kenny-d
4

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