JUCE/extras/Projucer/Source/ComponentEditor/Components/jucer_GenericComponentHandler.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


//==============================================================================
class GenericComponent  : public Component
{
public:
    GenericComponent()
        : Component ("new component"),
          actualClassName ("juce::Component")
    {
    }

    void paint (Graphics& g) override
    {
        g.fillAll (Colours::white.withAlpha (0.25f));

        g.setColour (Colours::black.withAlpha (0.5f));
        g.drawRect (getLocalBounds());
        g.drawLine (0.0f, 0.0f, (float) getWidth(), (float) getHeight());
        g.drawLine (0.0f, (float) getHeight(), (float) getWidth(), 0.0f);

        g.setFont (14.0f);
        g.drawText (actualClassName, 0, 0, getWidth(), getHeight() / 2, Justification::centred, true);
    }

    void setClassName (const String& newName)
    {
        if (actualClassName != newName)
        {
            actualClassName = newName;
            repaint();
        }
    }

    void setParams (const String& newParams)
    {
        if (constructorParams != newParams)
        {
            constructorParams = newParams;
            repaint();
        }
    }

    String actualClassName, constructorParams;
};

//==============================================================================
class GenericComponentHandler  : public ComponentTypeHandler
{
public:
    GenericComponentHandler()
        : ComponentTypeHandler ("Generic Component", "GenericComponent", typeid (GenericComponent), 150, 24)
    {}

    Component* createNewComponent (JucerDocument*) override
    {
        return new GenericComponent();
    }

    XmlElement* createXmlFor (Component* comp, const ComponentLayout* layout) override
    {
        XmlElement* e = ComponentTypeHandler::createXmlFor (comp, layout);
        e->setAttribute ("class", ((GenericComponent*) comp)->actualClassName);
        e->setAttribute ("params", ((GenericComponent*) comp)->constructorParams);

        return e;
    }

    bool restoreFromXml (const XmlElement& xml, Component* comp, const ComponentLayout* layout) override
    {
        if (! ComponentTypeHandler::restoreFromXml (xml, comp, layout))
            return false;

        ((GenericComponent*) comp)->actualClassName = xml.getStringAttribute ("class", "juce::Component");
        ((GenericComponent*) comp)->constructorParams = xml.getStringAttribute ("params", String());
        return true;
    }

    void getEditableProperties (Component* component, JucerDocument& document,
                                Array<PropertyComponent*>& props, bool multipleSelected) override
    {
        ComponentTypeHandler::getEditableProperties (component, document, props, multipleSelected);

        if (multipleSelected)
            return;

        props.add (new GenericCompClassProperty (dynamic_cast<GenericComponent*> (component), document));
        props.add (new GenericCompParamsProperty (dynamic_cast<GenericComponent*> (component), document));
    }

    String getClassName (Component* comp) const override
    {
        return static_cast<GenericComponent*> (comp)->actualClassName;
    }

    String getCreationParameters (GeneratedCode&, Component* comp) override
    {
        return static_cast<GenericComponent*> (comp)->constructorParams;
    }

    void fillInCreationCode (GeneratedCode& code, Component* component, const String& memberVariableName) override
    {
        ComponentTypeHandler::fillInCreationCode (code, component, memberVariableName);

        if (component->getName().isNotEmpty())
            code.constructorCode
                << memberVariableName << "->setName ("
                << quotedString (component->getName(), false)
                << ");\n\n";
        else
            code.constructorCode << "\n";
    }

private:
    class GenericCompClassProperty  : public ComponentTextProperty <GenericComponent>
    {
    public:
        GenericCompClassProperty (GenericComponent* comp, JucerDocument& doc)
            : ComponentTextProperty <GenericComponent> ("class", 300, false, comp, doc)
        {
        }

        void setText (const String& newText) override
        {
            document.perform (new GenericCompClassChangeAction (component, *document.getComponentLayout(),
                                                                build_tools::makeValidIdentifier (newText, false, false, true)),
                              "Change generic component class");
        }

        String getText() const override
        {
            return component->actualClassName;
        }

    private:
        class GenericCompClassChangeAction  : public ComponentUndoableAction <GenericComponent>
        {
        public:
            GenericCompClassChangeAction (GenericComponent* const comp, ComponentLayout& l, const String& newState_)
                : ComponentUndoableAction <GenericComponent> (comp, l),
                  newState (newState_)
            {
                oldState = comp->actualClassName;
            }

            bool perform()
            {
                showCorrectTab();
                getComponent()->setClassName (newState);
                changed();
                return true;
            }

            bool undo()
            {
                showCorrectTab();
                getComponent()->setClassName (oldState);
                changed();
                return true;
            }

            String newState, oldState;
        };
    };

    class GenericCompParamsProperty  : public ComponentTextProperty <GenericComponent>
    {
    public:
        GenericCompParamsProperty (GenericComponent* comp, JucerDocument& doc)
            : ComponentTextProperty <GenericComponent> ("constructor params", 1024, true, comp, doc)
        {
        }

        void setText (const String& newText) override
        {
            document.perform (new GenericCompParamsChangeAction (component, *document.getComponentLayout(), newText),
                              "Change generic component class");
        }

        String getText() const override
        {
            return component->constructorParams;
        }

    private:
        class GenericCompParamsChangeAction  : public ComponentUndoableAction <GenericComponent>
        {
        public:
            GenericCompParamsChangeAction (GenericComponent* const comp, ComponentLayout& l, const String& newState_)
                : ComponentUndoableAction <GenericComponent> (comp, l),
                  newState (newState_)
            {
                oldState = comp->constructorParams;
            }

            bool perform()
            {
                showCorrectTab();
                getComponent()->setParams (newState);
                changed();
                return true;
            }

            bool undo()
            {
                showCorrectTab();
                getComponent()->setParams (oldState);
                changed();
                return true;
            }

            String newState, oldState;
        };
    };
};