ARK-OS/arkos/arkrt/libinput/doc/touchpad-edge-scrolling-state-machine.svg

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      <text x="261" y="126">NONE</text>
      <text x="261" y="140">on-entry:</text>
      <text x="261" y="154">edge = none</text>
      <text x="261" y="168">threshold = def</text>
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      <text x="105" y="419">EDGE_NEW</text>
      <text x="105" y="433">on-entry:</text>
      <text x="105" y="447">edge = get_edge()</text>
      <text x="105" y="461">set_timer()</text>
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      <text x="413" y="419">AREA</text>
      <text x="413" y="433">on-entry:</text>
      <text x="413" y="447">edge = none</text>
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      <text x="261" y="36">release</text>
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      <text x="261" y="251">touch</text>
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      <text x="260" y="563">touch,</text>
      <text x="260" y="577">edge &amp;= get_edge()</text>
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      <text x="1133" y="36">tp_edge_scroll_post_events()</text>
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      <text x="1133" y="246">dirty?</text>
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      <text x="1133" y="115">current = buttons.state &amp; 0x01</text>
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      <text x="1331" y="458">notify_axis(last_axis, 0.0)</text>
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      <text x="1134" y="556">edge == right</text>
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      <text x="1328" y="551">axis = scroll_vertical</text>
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      <text x="1133" y="356">edge == none</text>
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      <text x="1133" y="696">edge == bottom</text>
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      <text x="1331" y="689">axis = scroll_horizontal</text>
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      <text x="1134" y="1111">delta &lt; threshold</text>
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      <text x="105" y="697">EDGE</text>
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