JUCE/extras/Projucer/Source/Utility/Helpers/jucer_ValueSourceHelpers.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


//==============================================================================
template <typename Type>
class NumericValueSource   : public ValueSourceFilter
{
public:
    NumericValueSource (const Value& source)  : ValueSourceFilter (source) {}

    var getValue() const override
    {
        return (Type) sourceValue.getValue();
    }

    void setValue (const var& newValue) override
    {
        const Type newVal = static_cast<Type> (newValue);

        if (newVal != static_cast<Type> (getValue()))  // this test is important, because if a property is missing, it won't
            sourceValue = newVal;                      // create it (causing an unwanted undo action) when a control sets it to 0
    }

    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (NumericValueSource)
};