ToggleButtonView.h

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/*
 * Copyright (c) 2018-2019 pongasoft
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 *
 * @author Yan Pujante
 */
#pragma once

#include <pongasoft/VST/GUI/Params/GUIVstParameter.h>
#include "CustomControlView.h"

namespace pongasoft::VST::GUI::Views {

using namespace VSTGUI;
using namespace Params;

class ToggleButtonView : public CustomDiscreteControlView
{
public:
  explicit ToggleButtonView(const CRect &iSize) : CustomDiscreteControlView(iSize)
  {
    // off color is grey
    fBackColor = CColor{200, 200, 200};
  }

  // draw => does the actual drawing job
  void draw(CDrawContext *iContext) override;

  // input events (mouse/keyboard)
  CMouseEventResult onMouseDown(CPoint &where, const CButtonState &buttons) override;

  CMouseEventResult onMouseUp(CPoint &where, const CButtonState &buttons) override;

  CMouseEventResult onMouseCancel() override;

  int32_t onKeyDown(VstKeyCode &keyCode) override;

  int32_t onKeyUp(VstKeyCode &keyCode) override;

  // sizeToFit
  bool sizeToFit() override;

  int32 getOffStep() const { return fOffStep; }
  void setOffStep(int32 iStep) { fOffStep = iStep; markDirty(); }

  int32 getComputedOffStep() const { return std::max(Utils::ZERO_INT32, getOffStep()); }

  int32 getOnStep() const { return fOnStep; }
  void setOnStep(int32 iStep) { fOnStep = iStep; markDirty(); }

  int32 getComputedOnStep() const;

  bool isOff() const { return getControlValue() == getComputedOffStep(); }

  bool isOn() const { return !isOff(); }

  inline void setOff() { setControlValue(getComputedOffStep()); }

  inline void setOn() { setControlValue(getComputedOnStep()); }

  inline void setOnOrOff(bool iOnOrOff) { iOnOrOff ? setOn() : setOff(); }

  int32 toggleControlValue();

  int getFrames() const { return fFrames; }

  void setFrames(int iFrames);

  CColor const &getOnColor() const { return fOnColor; }

  void setOnColor(CColor const &iColor) { fOnColor = iColor; }

  bool getInverse() const { return fInverse; }

  void setInverse(bool iInverse) { fInverse = iInverse; }

  BitmapPtr getImage() const { return fImage; }

  void setImage(BitmapPtr iImage) { fImage = iImage; }

protected:
  int32 fOffStep{-1};
  int32 fOnStep{-1};

  int fFrames{4};
  CColor fOnColor{kRedCColor};
  BitmapSPtr fImage{nullptr};
  bool fInverse{false};

  bool fPressed{false};

public:
  class Creator : public CustomViewCreator<ToggleButtonView, CustomDiscreteControlView>
  {
  public:
    explicit Creator(char const *iViewName = nullptr, char const *iDisplayName = nullptr) :
      CustomViewCreator(iViewName, iDisplayName)
    {
      registerIntegerAttribute<int32>("on-step", &ToggleButtonView::getOnStep, &ToggleButtonView::setOnStep);
      registerIntegerAttribute<int32>("off-step", &ToggleButtonView::getOffStep, &ToggleButtonView::setOffStep);
      registerIntAttribute("frames", &ToggleButtonView::getFrames, &ToggleButtonView::setFrames);
      registerColorAttribute("on-color", &ToggleButtonView::getOnColor, &ToggleButtonView::setOnColor);
      registerBitmapAttribute("button-image", &ToggleButtonView::getImage, &ToggleButtonView::setImage);
      registerBooleanAttribute("inverse", &ToggleButtonView::getInverse, &ToggleButtonView::setInverse);
    }
  };
};

}