JUCE/extras/Projucer/Source/ComponentEditor/PaintElements/jucer_ImageResourceProperty.h

/*
  ==============================================================================

   This file is part of the JUCE 6 technical preview.
   Copyright (c) 2020 - Raw Material Software Limited

   You may use this code under the terms of the GPL v3
   (see www.gnu.org/licenses).

   For this technical preview, this file is not subject to commercial licensing.

   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.

  ==============================================================================
*/

#pragma once

#include "../../ProjectSaving/jucer_ResourceFile.h"

//==============================================================================
/**
    A property that lets you pick a resource to use as an image, or create a
    new one with a file selector.
*/
template <class ElementType>
class ImageResourceProperty    : public ChoicePropertyComponent,
                                 private ChangeListener
{
public:
    ImageResourceProperty (JucerDocument& doc,
                           ElementType* const e,
                           const String& name,
                           const bool allowChoiceOfNoResource_)
        : ChoicePropertyComponent (name),
          element (e), document (doc),
          allowChoiceOfNoResource (allowChoiceOfNoResource_)
    {
        refreshChoices();
        doc.addChangeListener (this);
    }

    ImageResourceProperty (ElementType* const e, const String& name,
                           const bool allowChoiceOfNoResource_ = false)
        : ChoicePropertyComponent (name),
          element (e), document (*e->getDocument()),
          allowChoiceOfNoResource (allowChoiceOfNoResource_)
    {
        refreshChoices();
        document.addChangeListener (this);
    }

    ~ImageResourceProperty()
    {
        document.removeChangeListener (this);
    }

    //==============================================================================
    virtual void setResource (const String& newName) = 0;

    virtual String getResource() const = 0;

    //==============================================================================
    void setIndex (int newIndex)
    {
        if (newIndex == 0)
        {
            String resource (document.getResources()
                     .browseForResource ("Select an image file to add as a resource",
                                         "*.jpg;*.jpeg;*.png;*.gif;*.svg",
                                         File(),
                                         String()));

            if (resource.isNotEmpty())
                setResource (resource);
        }
        else
        {
            if (choices[newIndex] == getNoneText() && allowChoiceOfNoResource)
                setResource (String());
            else
                setResource (choices [newIndex]);
        }
    }

    int getIndex() const
    {
        if (getResource().isEmpty())
            return -1;

        return choices.indexOf (getResource());
    }

    void changeListenerCallback (ChangeBroadcaster*)
    {
        refresh();
    }

    void refreshChoices()
    {
        choices.clear();

        choices.add ("-- create a new image resource -- ");
        choices.add (String());

        if (allowChoiceOfNoResource)
            choices.add (getNoneText());

        choices.addArray (document.getResources().getResourceNames());

        const SourceCodeDocument& cpp = document.getCppDocument();

        if (Project* project = cpp.getProject())
        {
            JucerResourceFile resourceFile (*project);

            for (int i = 0; i < resourceFile.getNumFiles(); ++i)
            {
                const File& file = resourceFile.getFile(i);

                if (ImageFileFormat::findImageFormatForFileExtension(file))
                    choices.add (resourceFile.getClassName() + "::" + resourceFile.getDataVariableFor (file));
            }
        }
    }

    const char* getNoneText() noexcept      { return "<< none >>"; }

protected:
    mutable Component::SafePointer<ElementType> element;
    JucerDocument& document;
    const bool allowChoiceOfNoResource;
};