Slider class not recognized in JUCE6?

General JUCE discussion
1

I’m on Ubuntu 18.04, using the JUCE6 preview (so that I can build VST3). Following this early tutorial:

https://docs.juce.com/master/tutorial_code_basic_plugin.html

I get the error

error: ‘Slider’ does not name a type; did you mean ‘fwide’?

after adding the line

Slider midiVolume;

to the PluginEditor header file.

Any idea why this would be the case? I did see something about removing the need for including the JUCE header files, and this file still has

#include <JuceHeader.h>

at the top, though I’m too much of a noob to know if it’s related. If I remember correctly, last time I went through this tutorial (before switching to juce6) it worked fine.

Thanks for any help, and please feel free to let me know if there’s any more information I should provide.

2

I guess this is related to the JuceHeader.h generated by Projucer in JUCE 6 not doing using namespace juce; by default anymore. Instead of Slider midiVolume;, you should write juce::Slider midiVolume;.

3

Thanks for the reply! Adding “juce::” in front of “Slider” (both in the declaration, and in the statements added to the PluginEditor constructor where some Slider class functions are used) leaves me with this error in PluginProcessor.cpp:

In member function ‘virtual const juce::String TutorialPluginAudioProcessor::getName() const’:
error: ‘TutorialPlugin’ was not declared in this scope

I’m afraid this one has me stumped too.

4

The tutorials aren’t compatible with JUCE 6 yet, so you’ll need to be on either the master or develop branch to compile them. When JUCE 6 is released the tutorial projects will be updated too.

5

Thanks very much for your help. I moved to JUCE 6 because someone recommended it in order to be able to load my own plugins into the AudioPluginHost (so that I can take advantage of debugging options). Do you know if there’s any way to get that to work on Linux on the current master or develop branches? Right now I get

Note that the following files appeared to be plugin files, but failed to load correctly: plugin_name.so

when trying to add my plugins to the AudioPluginHost’s list with JUCE 5.4.7.

I do have the VST2 SDK to use until JUCE 6 is officially merged, if that helps.

Thanks again for any help or advice.

6

Linux VST3 support is only available on the juce6 branch at the moment, but you can build VST2s and load them in the AudioPluginHost if you have a copy of the VST2 SDK. Make sure that the path to your copy of the VST2 SDK is set in the Projucer’s global paths via the File->Global Paths... menu item and under the “VST (Legacy) SDK” field. You’ll also need to enable the JUCE_PLUGINHOST_VST flag in the juce_audio_processors module and re-save the AudioPluginHost project as it is disabled by default. Then rebuild the AudioPluginHost and your plug-ins and you should be able to load VST2s correctly.