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

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

   This file is part of the JUCE framework.
   Copyright (c) Raw Material Software Limited

   JUCE is an open source framework subject to commercial or open source
   licensing.

   By downloading, installing, or using the JUCE framework, or combining the
   JUCE framework with any other source code, object code, content or any other
   copyrightable work, you agree to the terms of the JUCE End User Licence
   Agreement, and all incorporated terms including the JUCE Privacy Policy and
   the JUCE Website Terms of Service, as applicable, which will bind you. If you
   do not agree to the terms of these agreements, we will not license the JUCE
   framework to you, and you must discontinue the installation or download
   process and cease use of the JUCE framework.

   JUCE End User Licence Agreement: https://juce.com/legal/juce-8-licence/
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   Or:

   You may also use this code under the terms of the AGPLv3:
   https://www.gnu.org/licenses/agpl-3.0.en.html

   THE JUCE FRAMEWORK IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL
   WARRANTIES, WHETHER EXPRESSED OR IMPLIED, INCLUDING WARRANTY OF
   MERCHANTABILITY OR FITNESS FOR A PARTICULAR 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() override
            {
                showCorrectTab();
                getComponent()->setClassName (newState);
                changed();
                return true;
            }

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

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

            String newState, oldState;
        };
    };
};