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78 lines
3 KiB
C++
78 lines
3 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE framework.
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Copyright (c) Raw Material Software Limited
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JUCE is an open source framework subject to commercial or open source
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licensing.
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By downloading, installing, or using the JUCE framework, or combining the
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JUCE framework with any other source code, object code, content or any other
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copyrightable work, you agree to the terms of the JUCE End User Licence
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Agreement, and all incorporated terms including the JUCE Privacy Policy and
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the JUCE Website Terms of Service, as applicable, which will bind you. If you
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do not agree to the terms of these agreements, we will not license the JUCE
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framework to you, and you must discontinue the installation or download
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process and cease use of the JUCE framework.
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JUCE End User Licence Agreement: https://juce.com/legal/juce-8-licence/
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JUCE Privacy Policy: https://juce.com/juce-privacy-policy
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JUCE Website Terms of Service: https://juce.com/juce-website-terms-of-service/
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Or:
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You may also use this code under the terms of the AGPLv3:
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https://www.gnu.org/licenses/agpl-3.0.en.html
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THE JUCE FRAMEWORK IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL
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WARRANTIES, WHETHER EXPRESSED OR IMPLIED, INCLUDING WARRANTY OF
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MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE DISCLAIMED.
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==============================================================================
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*/
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namespace juce
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{
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/**
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Calls a function every time the native scale factor of a component's peer changes.
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This is used in the VST and VST3 wrappers to ensure that the editor's scale is kept in sync with
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the scale of its containing component.
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@tags{GUI}
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*/
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class NativeScaleFactorNotifier : private ComponentMovementWatcher,
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private ComponentPeer::ScaleFactorListener
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{
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public:
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/** Constructs an instance.
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While the instance is alive, it will listen for changes to the scale factor of the
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comp's peer, and will call onScaleChanged whenever this scale factor changes.
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@param comp The component to observe
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@param onScaleChanged A function that will be called when the backing scale factor changes
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*/
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NativeScaleFactorNotifier (Component* comp, std::function<void (float)> onScaleChanged);
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~NativeScaleFactorNotifier() override;
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private:
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void nativeScaleFactorChanged (double newScaleFactor) override;
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void componentPeerChanged() override;
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using ComponentMovementWatcher::componentVisibilityChanged;
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void componentVisibilityChanged() override {}
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using ComponentMovementWatcher::componentMovedOrResized;
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void componentMovedOrResized (bool, bool) override {}
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ComponentPeer* peer = nullptr;
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std::function<void (float)> scaleChanged;
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JUCE_DECLARE_NON_COPYABLE (NativeScaleFactorNotifier)
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JUCE_DECLARE_NON_MOVEABLE (NativeScaleFactorNotifier)
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};
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} // namespace juce
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