fgdata/Aircraft/Instruments/throttle-knob.xml

<?xml version="1.0"?>

<!--
Default throttle knob.

Started summer 2000 by David Megginson, david@megginson.com.

This is an instrument configuration file for the open-source flight
simulator FlightGear (www.flightgear.org).  The file is an XML-encoded
FlightGear property list defining the instrument's layers and actions.

Each instrument is composed of layers stacked on top of each other.
A layer may be a texture (with transparent parts to show the layers
underneath), text, or a special layer that switches between two
others (say, to turn an indicator light on or off).  Each layer can
move independently in proportion to a property value, and text
can be generated from property values as well: all of the layer's
movements are defined as transformations.

Actions are hotspots on the instrument that will respond to a mouse
click.  Actions always modify the values of properties, either by
adjusting them, toggling them, or swaping them with other
properties' values.
-->

<PropertyList>

 <name>Throttle Knob</name>
 <w-base>64</w-base>
 <h-base>72</h-base>

 <params>
  <engine-throttle-select>/controls/throttle[0]</engine-throttle-select>
 </params>
 
 <layers>
  <layer>
   <name>background</name>
    <texture>
    <path>Aircraft/Instruments/Textures/misc-1.rgb</path>
    <x1>0.625</x1>
    <y1>0.2275</y1>
    <x2>0.8</x2>
    <y2>0.415</y2>
   </texture>
   <w>64</w>
   <h>64</h>
  </layer>   
<!-- fix texture -->
<!--layer>
   <name>shaft</name>
   <texture>
    <path>Aircraft/Instruments/Textures/misc-1.rgb</path>
    <x1>0.890625</x1>
    <y1>0.8125</y1>
    <x2>0.921875</x2>
    <y2>1.0</y2>
   </texture>
   <w>16</w>
   <h>24</h>
   <transformations>
    <transformation>
     <type>x-shift</type>
     <offset>-5</offset>
    </transformation>
   </transformations>
  </layer-->
  <layer>
   <name>knob</name>
   <texture>
    <path>Aircraft/Instruments/Textures/handles.rgb</path>
    <x1>0.0</x1>
    <y1>0.0</y1>
    <x2>0.5</x2>
    <y2>0.5</y2>
   </texture>
   <w>64</w>
   <h>64</h>
   <transformations>
    <transformation>
     <type>x-shift</type>
     <offset>0</offset>
    </transformation>
    <transformation>
     <type>y-shift</type>
     <property alias="../../../../../params/engine-throttle-select"/>
     <min>0.0</min>
     <max>1.0</max>
     <scale>18</scale>
     <offset>-20</offset>
    </transformation>
   </transformations>
  </layer>
 </layers>

 <actions>

  <action>
   <name>small decrease</name>
   <button>0</button>
   <x>-32</x>
   <y>-44</y>
   <w>32</w>
   <h>74</h>
   <binding>
    <command>property-adjust</command>
    <property alias="../../../../params/engine-throttle-select"/>
    <step>-0.01</step>
    <min>0</min>
    <max>1.0</max>
    <wrap>false</wrap>
   </binding>
  </action>

  <action>
   <name>small increase</name>
   <button>0</button>
   <x>0</x>
   <y>-44</y>
   <w>32</w>
   <h>74</h>
   <binding>
    <command>property-adjust</command>
    <property alias="../../../../params/engine-throttle-select"/>
    <step>0.01</step>
    <min>0</min>
    <max>1.0</max>
    <wrap>false</wrap>
   </binding>
  </action>

  <action>
   <name>big decrease</name>
   <button>1</button>
   <x>-32</x>
   <y>-44</y>
   <w>32</w>
   <h>74</h>
   <binding>
    <command>property-adjust</command>
    <property alias="../../../../params/engine-throttle-select"/>
    <step>-0.1</step>
    <min>0</min>
    <max>1.0</max>
    <wrap>false</wrap>
   </binding>
  </action>

  <action>
   <name>big increase</name>
   <button>1</button>
   <x>0</x>
   <y>-44</y>
   <w>32</w>
   <h>74</h>
   <binding>
    <command>property-adjust</command>
    <property alias="../../../../params/engine-throttle-select"/>
    <step>0.1</step>
    <min>0</min>
    <max>1.0</max>
    <wrap>false</wrap>
   </binding>
  </action>

 </actions>

</PropertyList>