Sequoia - Cannot drop MIDI onto Logic

MacOSX and iOS
1

Hi, it’s no longer possible to drop MIDI onto Logic. Dropping onto Live is fine.

Guessing this is going to be OS/Logic issue but just wondered if theres anything the Juce team is aware of?

Update: I can drop the MIDI file that I generate onto Logic and that works, so it looks like it’s the performExternalDragDropOfFiles() call that is not doing its task.

Thx

2

Just download and tried Scaler 2 to see if it has the same problem and it works fine.

3

Can you supply some more information please:

  • Which Logic version are you testing?
  • On which platform, Intel/Arm?
  • If Arm, are you running under Rosetta?
  • Are you building AU or AUv3?
  • Which directory are you using to store the intermediate MIDI file?
  • Have you enabled macOS security technologies such as entitlements, sandboxing, or hardened runtime?

I tested the following plugin project as an AU on Logic 11.0.1 Arm, macOS 15.0.1. This is using the AudioPlugin CMake example, so it doesn’t have any extra entitlements/sandboxing. The plugin is able to drop a MIDI snippet into the timeline as expected:

class AudioPluginAudioProcessorEditor final : public juce::AudioProcessorEditor,
                                              public juce::DragAndDropContainer
{
public:
    explicit AudioPluginAudioProcessorEditor (AudioPluginAudioProcessor&);

    void paint (juce::Graphics& g) override
    {
        g.fillAll (getLookAndFeel().findColour (juce::ResizableWindow::backgroundColourId));

        g.setColour (juce::Colours::white);
        g.setFont (15.0f);
        g.drawFittedText (juce::SystemStats::getJUCEVersion(), getLocalBounds(), juce::Justification::centred, 1);
    }

    void mouseDrag (const juce::MouseEvent&) override
    {
        const auto f = juce::File::getSpecialLocation (juce::File::userDesktopDirectory).getChildFile ("drag.midi");

        {
            constexpr auto ticks = 96;

            juce::MidiFile midiFile;
            midiFile.setTicksPerQuarterNote (ticks);

            juce::MidiMessageSequence sequence;
            sequence.addEvent (juce::MidiMessage::noteOn (1, 64, 0.5f).withTimeStamp (0));
            sequence.addEvent (juce::MidiMessage::noteOff (1, 64, 0.5f).withTimeStamp (ticks));

            midiFile.addTrack (sequence);

            juce::FileOutputStream stream { f };
            stream.setPosition (0);
            stream.truncate();

            midiFile.writeTo (stream);
        }

        performExternalDragDropOfFiles ({ f.getFullPathName() }, false, this, {});
    }

private:
    AudioPluginAudioProcessor& processorRef;

    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (AudioPluginAudioProcessorEditor)
};

input

[WebView] Drag and drop audio files out of plugin
[WebView] Drag and drop audio files out of plugin
4

thx for the demo code - I’m doing pretty much the same in my app. I copied your code across to my app and the D&D fails. Most strange.

5

Can you try in a blank plugin? If it works in a blank plugin, that would hint that there’s something specific to your original plugin that breaks DnD in this case. If it doesn’t work in a blank project either, that might indicate that the issue is caused by the DnD implementation itself, rather than an interaction between DnD and other parts of the plugin.

1 Like
6

yep, will do this shortly.

7

Hi, yes,your code in a new plugin works fine.

can you think of anything offhand that I can be doing in my app to affect this? FYI, my app works for other DAWs(Live,Bitwig,FL) and also works for Logic running on Sonoma and other OSes.

Thx

8

It sounds like my example app is using a different directory for the temporary MIDI file. Maybe you could try changing this directory in the example so that it matches your original plugin, and see whether it still works.

9

Directory makes no difference. If I have the D&D code on the maingui, it works fine, but I have my D&D code on a subcomponent so looks like that’s causing the issue.

10

Found it. I was calling deleteFile() on the file before creating the new stream. Changed this to use setPosition and truncate on the stream as you do, and it works fine now.

Thanks