JUCE/extras/Projucer/Source/ComponentEditor/jucer_ComponentLayout.h

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

   This file is part of the JUCE library.
   Copyright (c) 2017 - ROLI Ltd.

   JUCE is an open source library subject to commercial or open-source
   licensing.

   By using JUCE, you agree to the terms of both the JUCE 5 End-User License
   Agreement and JUCE 5 Privacy Policy (both updated and effective as of the
   27th April 2017).

   End User License Agreement: www.juce.com/juce-5-licence
   Privacy Policy: www.juce.com/juce-5-privacy-policy

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

   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 "components/jucer_ComponentTypeHandler.h"
class JucerDocument;


//==============================================================================
/**
    Manages the set of sub-components for a JucerDocument.

*/
class ComponentLayout
{
public:
    //==============================================================================
    ComponentLayout();
    ~ComponentLayout();

    //==============================================================================
    void changed();

    int getNumComponents() const noexcept                                { return components.size(); }
    Component* getComponent (const int index) const noexcept             { return components [index]; }
    int indexOfComponent (Component* const comp) const noexcept          { return components.indexOf (comp); }
    bool containsComponent (Component* const comp) const noexcept        { return components.contains (comp); }

    //==============================================================================
    void clearComponents();
    void removeComponent (Component* comp, const bool undoable);

    Component* addNewComponent (ComponentTypeHandler* const type, int x, int y);
    Component* addComponentFromXml (const XmlElement& xml, const bool undoable);

    Component* findComponentWithId (const int64 componentId) const;

    //==============================================================================
    void componentToFront (Component* comp, const bool undoable);
    void componentToBack (Component* comp, const bool undoable);

    void setComponentPosition (Component* comp, const RelativePositionedRectangle& newPos, const bool undoable);
    void updateStoredComponentPosition (Component* comp, const bool undoable);

    //==============================================================================
    Component* getComponentRelativePosTarget (Component* comp, int whichDimension) const;
    void setComponentRelativeTarget (Component* comp, int whichDimension, Component* compToBeRelativeTo);
    // checks recursively whether the comp depends on the given comp for its position
    bool dependsOnComponentForRelativePos (Component* comp, Component* possibleDependee) const;

    PopupMenu getRelativeTargetMenu (Component* comp, int whichDimension) const;
    void processRelativeTargetMenuResult (Component* comp, int whichDimension, int menuResultID);

    //==============================================================================
    void setComponentMemberVariableName (Component* comp, const String& newName);
    String getComponentMemberVariableName (Component* comp) const;

    //==============================================================================
    void setComponentVirtualClassName (Component* comp, const String& newName);
    String getComponentVirtualClassName (Component* comp) const;

    //==============================================================================
    SelectedItemSet <Component*>& getSelectedSet()                      { return selected; }

    static const char* const clipboardXmlTag;
    void copySelectedToClipboard();
    void paste();
    void deleteSelected();
    void selectAll();

    void selectedToFront();
    void selectedToBack();

    void startDragging();
    void dragSelectedComps (int dxFromDragStart, int dyFromDragStart, const bool allowSnap = true);
    void endDragging();

    void moveSelectedComps (int dx, int dy, bool snap);
    void stretchSelectedComps (int dw, int dh, bool allowSnap);

    void bringLostItemsBackOnScreen (int width, int height);

    //==============================================================================
    void setDocument (JucerDocument* const doc)                   { document = doc; }
    JucerDocument* getDocument() const noexcept                   { return document; }

    //==============================================================================
    void addToXml (XmlElement& xml) const;

    void fillInGeneratedCode (GeneratedCode& code) const;

    void perform (UndoableAction* action, const String& actionName);

private:
    JucerDocument* document;
    OwnedArray <Component> components;
    SelectedItemSet <Component*> selected;
    int nextCompUID;

    String getUnusedMemberName (String nameRoot, Component* comp) const;

    friend class FrontBackCompAction;
    friend class DeleteCompAction;
    void moveComponentZOrder (int oldIndex, int newIndex);
};

void positionToCode (const RelativePositionedRectangle& position,
                     const ComponentLayout* layout,
                     String& x, String& y, String& w, String& h);