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onLoadSubPreset(section, data)

Description

This callback function is called when loading a subpreset with a corresponding Preset Browser template. The callback will only be called if the scope of the Preset Browser template is set correctly.

  • If the MacroPage with the Preset Browser template is attached to an element other than the script module (e.g., the program), the scope of the Preset Browser template must be set to the script module (e.g., @0:Script Module).
  • If the MacroPage with the Preset Browser template is attached to the script module, the scope does not need to be set.

In adition, the Preset Browser Custom template allows you to define a section for the subpreset. When you load a subpreset, the defined section and the data stored in the subpreset will be passed on to the callback. The data is the same data that was returned by onSaveSubPreset when the subpreset was saved. You can manage different subsets of parameters by using the section as condition for an if statement that restores only the parameters of interest.

Scope and section are template parameters. You can set them in the MacroPage Designer on the properties pane of the Preset Browser and Preset Browser Custom templates.

 

Available in: Controller.

Arguments

sectionThe section as defined in the Preset Browser Custom template.string
dataThe data that was returned by onSaveSubPreset. 

Example

--[[
    The corresponding MacroPage needs two preset templates: One with
    the section set to Pitch and the other with the section set to Filter.

    The preset template with the section Pitch stores/restores the
    parameters Pitch.Coarse and Pitch.Fine.

    The preset template with the section Filter stores/restores the
    parameters Filter.Cutoff and Filter.Resonance.
--]]

-- get the values of p1 and p2 from the first zone of the program
function getZoneData(p1, p2)
	local data = {}
    local zone = this.program:findZones(true)
    if zone[1] then
        data.p1 = zone[1]:getParameter(p1)
        data.p2 = zone[1]:getParameter(p2)
    end
    return data
end

-- set the values of p1 and p2 in the first zone of the program
function setZoneData(p1, p2, data)
    local zone = this.program:findZones(true)
    if zone[1] then
        zone[1]:setParameter(p1, data.p1)
        zone[1]:setParameter(p2, data.p2)
    end
end

-- save data with the subpreset
function onSaveSubPreset(section)
    if section == "Pitch" then
        return getZoneData("Pitch.Coarse", "Pitch.Fine" ) -- called from preset template Pitch
    elseif section == "Filter" then
        return getZoneData("Filter.Cutoff", "Filter.Resonance") -- called from preset template Filter
    end
end

-- restore data from the subpreset
function onLoadSubPreset(section, data)
    if section == "Pitch" then
        setZoneData("Pitch.Coarse", "Pitch.Fine", data) -- called from preset template Pitch
    elseif section == "Filter" then
        setZoneData("Filter.Cutoff", "Filter.Resonance", data) -- called from preset template Filter
    end
end

See Also: onSaveSubPreset

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