JUCE/extras/Projucer/Source/ComponentEditor/Components/jucer_GroupComponentHandler.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 GroupComponentHandler  : public ComponentTypeHandler
{
public:
    GroupComponentHandler()
        : ComponentTypeHandler ("Group Box", "juce::GroupComponent", typeid (GroupComponent), 200, 150)
    {
        registerColour (GroupComponent::outlineColourId, "outline", "outlinecol");
        registerColour (GroupComponent::textColourId, "text", "textcol");
    }

    Component* createNewComponent (JucerDocument*) override
    {
        return new GroupComponent ("new group", "group");
    }

    XmlElement* createXmlFor (Component* comp, const ComponentLayout* layout) override
    {
        GroupComponent* const g = (GroupComponent*) comp;

        XmlElement* e = ComponentTypeHandler::createXmlFor (comp, layout);
        e->setAttribute ("title", g->getText());

        GroupComponent defaultComp;

        if (g->getTextLabelPosition().getFlags() != defaultComp.getTextLabelPosition().getFlags())
            e->setAttribute ("textpos", g->getTextLabelPosition().getFlags());

        return e;
    }

    bool restoreFromXml (const XmlElement& xml, Component* comp, const ComponentLayout* layout) override
    {
        GroupComponent* const g = (GroupComponent*) comp;

        if (! ComponentTypeHandler::restoreFromXml (xml, comp, layout))
            return false;

        g->setText (xml.getStringAttribute ("title", g->getText()));
        g->setTextLabelPosition (Justification (xml.getIntAttribute ("textpos", g->getTextLabelPosition().getFlags())));

        return true;
    }

    String getCreationParameters (GeneratedCode& code, Component* component) override
    {
        GroupComponent* g = dynamic_cast<GroupComponent*> (component);

        return quotedString (component->getName(), false)
                + ",\n"
                + quotedString (g->getText(), code.shouldUseTransMacro());
    }

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

        GroupComponent* const g = dynamic_cast<GroupComponent*> (component);

        String s;

        GroupComponent defaultComp;

        if (g->getTextLabelPosition().getFlags() != defaultComp.getTextLabelPosition().getFlags())
        {
            s << memberVariableName << "->setTextLabelPosition ("
              << CodeHelpers::justificationToCode (g->getTextLabelPosition())
              << ");\n";
        }

        s << getColourIntialisationCode (component, memberVariableName)
          << '\n';

        code.constructorCode += s;
    }

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

        if (multipleSelected)
            return;

        if (auto* gc = dynamic_cast<GroupComponent*> (component))
        {
            props.add (new GroupTitleProperty (gc, document));
            props.add (new GroupJustificationProperty (gc, document));
        }

        addColourProperties (component, document, props);
    }

private:
    //==============================================================================
    class GroupTitleProperty   : public ComponentTextProperty <GroupComponent>
    {
    public:
        GroupTitleProperty (GroupComponent* comp, JucerDocument& doc)
            : ComponentTextProperty <GroupComponent> ("text", 200, false, comp, doc)
        {}

        void setText (const String& newText) override
        {
            document.perform (new GroupTitleChangeAction (component, *document.getComponentLayout(), newText),
                              "Change group title");
        }

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

    private:
        class GroupTitleChangeAction  : public ComponentUndoableAction <GroupComponent>
        {
        public:
            GroupTitleChangeAction (GroupComponent* const comp, ComponentLayout& l, const String& newName_)
                : ComponentUndoableAction <GroupComponent> (comp, l),
                  newName (newName_)
            {
                oldName = comp->getText();
            }

            bool perform()
            {
                showCorrectTab();
                getComponent()->setText (newName);
                changed();
                return true;
            }

            bool undo()
            {
                showCorrectTab();
                getComponent()->setText (oldName);
                changed();
                return true;
            }

            String newName, oldName;
        };
    };

    //==============================================================================
    class GroupJustificationProperty  : public JustificationProperty,
                                        private ChangeListener
    {
    public:
        GroupJustificationProperty (GroupComponent* const group_, JucerDocument& doc)
            : JustificationProperty ("layout", true),
              group (group_),
              document (doc)
        {
            document.addChangeListener (this);
        }

        ~GroupJustificationProperty() override
        {
            document.removeChangeListener (this);
        }

        void setJustification (Justification newJustification) override
        {
            document.perform (new GroupJustifyChangeAction (group, *document.getComponentLayout(), newJustification),
                              "Change text label position");
        }

        Justification getJustification() const override
        {
            return group->getTextLabelPosition();
        }

    private:
        void changeListenerCallback (ChangeBroadcaster*) override { refresh(); }

        GroupComponent* const group;
        JucerDocument& document;

        class GroupJustifyChangeAction  : public ComponentUndoableAction <GroupComponent>
        {
        public:
            GroupJustifyChangeAction (GroupComponent* const comp, ComponentLayout& l, Justification newState_)
                : ComponentUndoableAction <GroupComponent> (comp, l),
                  newState (newState_),
                  oldState (comp->getTextLabelPosition())
            {
            }

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

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

            Justification newState, oldState;
        };
    };
};