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Halve chase speed

by:	Gregory Haynes, Feb 2016
published:	http://forum.avolites.com/viewtopic.php?f=20&t=3744#p15848
description:	halves currently chase's BPM rate
remarks:	The problem with this code is that it requires the chase to be set as the selected playback in the editor (used for the Edit Times menu). This means that the Playback View which could be showing a cue list switches to show the chase instead, to get around this I have stored the previous selected playback and restore that afterwards but this does cause the display to flicker.

functions

affected properties

This macro works perfectly well in Titan 9.1, does misbehave in 10.0 (always sets speed to 0 BPM), and throws an error in 10.1 (variable not registered).

Code

halvechasespeed.xml

<?xml version="1.0" encoding="utf-8"?>
<avolites.macros xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="Avolites.Menus.xsd">
  <macro name="Chase Speed Half" id="Avolites.Macros.ChaseSpeedHalf">
    <description>Halves the speed of the currently connected chase.</description>
    <sequence>
      <step>ActionScript.SetProperty("Handles.SourceHandle", Playbacks.Editor.SelectedPlayback)</step>
      <step>ActionScript.SetProperty("Playbacks.Editor.SelectedPlayback", Chases.ConnectedHandle)</step>
      <step>ActionScript.SetProperty.Float("Playbacks.Editor.Times.ChaseSpeed", Playbacks.Editor.Times.ChaseSpeed / 2)</step>
      <step condition="Math.IsLessThan(Playbacks.Editor.Times.ChaseSpeed, 1.0)">ActionScript.SetProperty.Float("Playbacks.Editor.Times.ChaseSpeed", 0.0)</step>
      <step>ActionScript.SetProperty("Playbacks.Editor.SelectedPlayback", Handles.SourceHandle)</step>
    </sequence>
  </macro>
</avolites.macros>

Explanation

This explains the functional steps within the sequence. For all the other XML details please refer to Formats and syntax

ActionScript.SetProperty(“Handles.SourceHandle”, Playbacks.Editor.SelectedPlayback)
temporarily stores the currently selected playback into 'Handles.SourceHandle' from where it will be retrieved when the macro is finished, see Gregory's explanation above
ActionScript.SetProperty(“Playbacks.Editor.SelectedPlayback”, Chases.ConnectedHandle)
this selects the currently connected chaser for editing
ActionScript.SetProperty.Float(“Playbacks.Editor.Times.ChaseSpeed”, Playbacks.Editor.Times.ChaseSpeed / 2)
sets the speed of the chaser to its half
<step condition=“Math.IsLessThan(Playbacks.Editor.Times.ChaseSpeed, 1.0)”>ActionScript.SetProperty.Float(“Playbacks.Editor.Times.ChaseSpeed”, 0.0)</step>
if the speed is less than 1.0: sets speed to 0.0
ActionScript.SetProperty(“Playbacks.Editor.SelectedPlayback”, Handles.SourceHandle)
restores the selected playback from before the macro was run

How to use it