JUCE/extras/Projucer/Source/ComponentEditor/Components/jucer_TreeViewHandler.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
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   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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   JUCE Website Terms of Service: https://juce.com/juce-website-terms-of-service/

   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 TreeViewHandler  : public ComponentTypeHandler
{
public:
    TreeViewHandler()
        : ComponentTypeHandler ("TreeView", "juce::TreeView", typeid (DemoTreeView), 150, 150)
    {
        registerColour (juce::TreeView::backgroundColourId, "background", "backgroundColour");
        registerColour (juce::TreeView::linesColourId, "lines", "linecol");
    }

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

    XmlElement* createXmlFor (Component* comp, const ComponentLayout* layout) override
    {
        TreeView* const t = dynamic_cast<TreeView*> (comp);
        XmlElement* const e = ComponentTypeHandler::createXmlFor (comp, layout);

        e->setAttribute ("rootVisible", t->isRootItemVisible());
        e->setAttribute ("openByDefault", t->areItemsOpenByDefault());

        return e;
    }

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

        TreeView defaultTreeView;
        TreeView* const t = dynamic_cast<TreeView*> (comp);

        t->setRootItemVisible (xml.getBoolAttribute ("rootVisible", defaultTreeView.isRootItemVisible()));
        t->setDefaultOpenness (xml.getBoolAttribute ("openByDefault", defaultTreeView.areItemsOpenByDefault()));

        return true;
    }

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

        if (multipleSelected)
            return;

        auto* t = dynamic_cast<TreeView*> (component);

        props.add (new TreeViewRootItemProperty (t, document));
        props.add (new TreeViewRootOpennessProperty (t, document));

        addColourProperties (t, document, props);
    }

    String getCreationParameters (GeneratedCode&, Component* comp) override
    {
        return quotedString (comp->getName(), false);
    }

    void fillInCreationCode (GeneratedCode& code, Component* component, const String& memberVariableName) override
    {
        TreeView defaultTreeView;
        TreeView* const t = dynamic_cast<TreeView*> (component);

        ComponentTypeHandler::fillInCreationCode (code, component, memberVariableName);

        if (defaultTreeView.isRootItemVisible() != t->isRootItemVisible())
        {
            code.constructorCode
                << memberVariableName << "->setRootItemVisible ("
                << CodeHelpers::boolLiteral (t->isRootItemVisible()) << ");\n";
        }

        if (defaultTreeView.areItemsOpenByDefault() != t->areItemsOpenByDefault())
        {
            code.constructorCode
                << memberVariableName << "->setDefaultOpenness ("
                << CodeHelpers::boolLiteral (t->areItemsOpenByDefault()) << ");\n";
        }

        code.constructorCode << getColourIntialisationCode (component, memberVariableName);
        code.constructorCode << "\n";
    }

private:
    //==============================================================================
    class DemoTreeView : public TreeView
    {
    public:
        DemoTreeView()
            : TreeView ("new treeview")
        {
            setRootItem (new DemoTreeViewItem ("Demo root node", 4));
        }

        ~DemoTreeView()
        {
            deleteRootItem();
        }

    private:
        class DemoTreeViewItem  : public TreeViewItem
        {
        public:
            DemoTreeViewItem (const String& name_, const int numItems)
                : name (name_)
            {
                for (int i = 0; i < numItems; ++i)
                    addSubItem (new DemoTreeViewItem ("Demo sub-node " + String (i), numItems - 1));
            }

            void paintItem (Graphics& g, int width, int height) override
            {
                if (isSelected())
                    g.fillAll (Colours::lightblue);

                g.setColour (Colours::black);
                g.setFont ((float) height * 0.7f);
                g.drawText (name, 4, 0, width - 4, height, Justification::centredLeft, true);
            }

            bool mightContainSubItems() override
            {
                return true;
            }

            const String name;
        };
    };

    //==============================================================================
    class TreeViewRootItemProperty  : public ComponentBooleanProperty <TreeView>
    {
    public:
        TreeViewRootItemProperty (TreeView* comp, JucerDocument& doc)
            : ComponentBooleanProperty <TreeView> ("show root item", "Root item visible", "Root item visible", comp, doc)
        {
        }

        void setState (bool newState) override
        {
            document.perform (new TreeviewRootChangeAction (component, *document.getComponentLayout(), newState),
                              "Change TreeView root item");
        }

        bool getState() const override
        {
            return component->isRootItemVisible();
        }

    private:
        class TreeviewRootChangeAction  : public ComponentUndoableAction <TreeView>
        {
        public:
            TreeviewRootChangeAction (TreeView* const comp, ComponentLayout& l, const bool newState_)
                : ComponentUndoableAction <TreeView> (comp, l),
                  newState (newState_)
            {
                oldState = comp->isRootItemVisible();
            }

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

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

            bool newState, oldState;
        };
    };

    //==============================================================================
    class TreeViewRootOpennessProperty  : public ComponentChoiceProperty <TreeView>
    {
    public:
        TreeViewRootOpennessProperty (TreeView* comp, JucerDocument& doc)
            : ComponentChoiceProperty <TreeView> ("default openness", comp, doc)
        {
            choices.add ("Items open by default");
            choices.add ("Items closed by default");
        }

        void setIndex (int newIndex) override
        {
            document.perform (new TreeviewOpennessChangeAction (component, *document.getComponentLayout(), newIndex == 0),
                              "Change TreeView openness");
        }

        int getIndex() const override
        {
            return component->areItemsOpenByDefault() ? 0 : 1;
        }

    private:
        class TreeviewOpennessChangeAction  : public ComponentUndoableAction <TreeView>
        {
        public:
            TreeviewOpennessChangeAction (TreeView* const comp, ComponentLayout& l, const bool newState_)
                : ComponentUndoableAction <TreeView> (comp, l),
                  newState (newState_)
            {
                oldState = comp->areItemsOpenByDefault();
            }

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

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

            bool newState, oldState;
        };
    };
};