Expansions / Combo Box + SampleMaps

[DanH]

@d-healey What do you mean by 'handler'? I created two expansions using the system in the sampler window, they're all fine and populated with the right folders etc and show up in the combo box and in the preset browser.

These are the only settings I've changed in Prefs:

Am I right in thinking we no longer need to set flags?

PS - if I use the Preset Browser to navigate the expansions the presets appear like normal, just not using the combobox method

[d.healey]

@DanH said in Expansions / Combo Box + SampleMaps:

Am I right in thinking we no longer need to set flags?

Nope

@DanH said in Expansions / Combo Box + SampleMaps:

What do you mean by 'handler'?

Read the docs - https://docs.hise.audio/working-with-hise/project-management/expansions/index.html

Make sure you read all of the sub categories too.

[DanH]

@d-healey

Make sure you read all of the sub categories too.

I have but I'm still not sure what you're referring to

[d.healey]

@DanH Did you use the tutorial projects provided in the docs?

Also there's more docs :D https://docs.hise.audio/scripting/scripting-api/expansionhandler

[DanH]

@d-healey ahaaaaaaa.... Merely typing 'Expansion' into the Docs search does not reveal any of the handler apis lol

Ok thanks for this, lots more to chew through :thumbs_up_light_skin_tone:

EDIT - Ok we're getting somewhere now!

[DanH]

@d-healey

If you want to use a combo box add an entry to select "no expansion" and when that's enabled you can use expHandler.setCurrentExpansion("") to go back to your factory project's data.

So if I'm using

const var expansions = Engine.getExpansionList();

(which is preferable to writing a static list manually), how would I add the 'no expansion' entry to the list?

[d.healey]

@DanH said in Expansions / Combo Box + SampleMaps:

So if I'm using
const var expansions = Engine.getExpansionList();

You won't be using that ;) You'll be using expHandler.getExpansionList(). Go through the tutorial projects.

[DanH]

@d-healey Righto, but I think my point is roughly the same:

expHandler.getExpansionList() creates a predefined array. Can it be further edited?

[d.healey]

@DanH Of course, it's just an array like any other.

[DanH]

@d-healey Morning!

I've got the project more or less working for switching between expansions. The Preset Browser updates with the right presets from each expansion. However, when I don't select an expansion (i.e go back to 'factory' presets), the Preset Browser doesn't update and shows the last expansion selected.

Is there a command to populate the preset browser with the 'factory' presets?

[d.healey]

@DanH It should happen automatically. How many columns are in your preset browser?

[DanH]

@d-healey I'm using a combo box to switch between the expansions. I don't want the column in the preset browser, but it's there for now and works fine when switching between expansions and back to factory in the browser itself (just not the combo box)

[d.healey]

@DanH I see. I think that feature of going back to the "factory" presets must be unique to the preset browser. Have a look in the source code and see where it happens. If it's straightforward it should be pretty easy to translate into a scriptable function.

[DanH]

@d-healey Ok, found a couple of contenders. Out of curiosity though, you mentioned in your expansions video that Christoph helped you implement a function whereby the Preset Browser would update itself when switching between expansions (23:20). This is kind of the reverse!

Also the instrument you showed as an example in the video used buttons to switch between expansions. Did you go in favour of the Preset Browser Expansion Column route in the end?

[d.healey]

@DanH

Did you go in favour of the Preset Browser Expansion Column route in the end?

Yes, I don't think that existed when I made the video.

[DanH]

@d-healey ok thanks.

So I'm looking in PresetBrowser.cpp line 616 and 691 as places of interest...

I've just realised that if I don't have the Expansion Column enabled in the Preset Browser then the presets won't switch at all when selecting expansions with the combo box (but I can set the column width to zero so I don't have to see it)

[DanH]

@d-healey Are either of these sections of use to me do you think?

[d.healey]

@DanH oh I thought you'd solved it by hiding the columns. I'll take a look when I'm back at my computer.

[d.healey]

You might just need a wrapper around this function - void PresetBrowser::rebuildAllPresets() - you might also need to include the set root file thingy but I don't know.

[DanH]

@d-healey ok thanks :) I'll come back to that in a sec.

I'm currently trying to get my combobox (SAMPLEBOX) to update with the samplemaps available in either an expansion or Factory mode. It's not really working however! I've tried to bend one of @Christoph-Hart's expansions examples to this purpose.

Any insight would be hugely welcome :)

const var expHandler = Engine.createExpansionHandler();

const var expansions = expHandler.getExpansionList();

const var expansionNames = [];

expansionNames.push("FACTORY");

for(e in expHandler.getExpansionList())
    expansionNames.push(e.getProperties().Name);
    

const var ExpansionSelector = Content.getComponent("ExpansionSelector");
ExpansionSelector.set("items", expansionNames.join("\n"));


inline function onExpansionSelectorControl(component, value)
{
	//Engine.setCurrentExpansion(component.getItemText());
	expHandler.setCurrentExpansion(component.getItemText());
};

Content.getComponent("ExpansionSelector").setControlCallback(onExpansionSelectorControl);

// Implement the expansion switch

inline function onExpansionSelectorControl(component, value)
{
	local expansionToLoad = component.getItemText();
	
	// We want the first item to reset the current expansion
	// so we need to change it to an empty string
	if(expansionToLoad == expansionNames[0])
        expansionToLoad = "";
    
	expHandler.setCurrentExpansion(expansionToLoad);
};

Content.getComponent("ExpansionSelector").setControlCallback(onExpansionSelectorControl);

inline function newcombobox(newExpansion)
{
    
    
    if(isDefined(newExpansion))
    {

        local cx = expHandler.getCurrentExpansion();
        local xs = cx.getSampleMapList();
        SAMPLEBOX.set("items", xs.join("\n"));

    }
    else
    {

        SAMPLEBOX.set("items", mySampleMapNames.join("\n"));
    }
    
    
}


expHandler.setExpansionCallback(newcombobox);

// Call it once with undefined so that it loads the root images
newcombobox(undefined);