JUCE/extras/Projucer/Source/ComponentEditor/PaintElements/jucer_PointComponent.h

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

   This file is part of the JUCE 6 technical preview.
   Copyright (c) 2017 - ROLI Ltd.

   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

#include "jucer_ElementSiblingComponent.h"
#include "../UI/jucer_PaintRoutineEditor.h"

//==============================================================================
class PointComponent    : public ElementSiblingComponent
{
public:
    PointComponent (PaintElement* const e)
        : ElementSiblingComponent (e)
    {
        setSize (11, 11);
        setMouseCursor (MouseCursor::UpDownLeftRightResizeCursor);
    }

    virtual RelativePositionedRectangle getPosition() = 0;
    virtual void setPosition (const RelativePositionedRectangle& newPos) = 0;

    void updatePosition() override
    {
        if (dynamic_cast<PaintRoutineEditor*> (getParentComponent()) != nullptr)
        {
            const Rectangle<int> area (((PaintRoutineEditor*) getParentComponent())->getComponentArea());
            const Rectangle<int> r (getPosition().getRectangle (area, owner->getDocument()->getComponentLayout()));

            setCentrePosition (r.getX(), r.getY());
        }
    }

    //==============================================================================
    void paint (Graphics& g) override
    {
        g.setColour (Colours::white);
        g.drawEllipse (2.0f, 2.0f, getWidth() - 4.0f, getHeight() - 4.0f, 2.0f);

        g.setColour (Colours::black);
        g.drawEllipse (1.0f, 1.0f, getWidth() - 2.0f, getHeight() - 2.0f, 2.0f);
    }

    //==============================================================================
    void mouseDown (const MouseEvent&) override
    {
        const Rectangle<int> area (((PaintRoutineEditor*) getParentComponent())->getComponentArea());
        dragX = getX() + getWidth() / 2 - area.getX();
        dragY = getY() + getHeight() / 2 - area.getY();
    }

    void mouseDrag (const MouseEvent& e) override
    {
        const Rectangle<int> area (((PaintRoutineEditor*) getParentComponent())->getComponentArea());
        int x = dragX + e.getDistanceFromDragStartX();
        int y = dragY + e.getDistanceFromDragStartY();

        if (JucerDocument* const document = owner->getDocument())
        {
            x = document->snapPosition (x);
            y = document->snapPosition (y);

            const RelativePositionedRectangle original (getPosition());
            RelativePositionedRectangle pr (original);

            Rectangle<int> r (pr.getRectangle (Rectangle<int> (0, 0, area.getWidth(), area.getHeight()),
                                               document->getComponentLayout()));
            r.setPosition (x, y);

            pr.updateFrom (r.getX(), r.getY(), r.getWidth(), r.getHeight(),
                           Rectangle<int> (0, 0, area.getWidth(), area.getHeight()),
                           document->getComponentLayout());

            if (pr != original)
                setPosition (pr);
        }
    }

    void mouseUp (const MouseEvent&) override
    {
    }

private:
    int dragX, dragY;
};