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118 lines
4.2 KiB
C++
118 lines
4.2 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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#if JUCE_WINDOWS
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namespace juce::detail
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{
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class WindowsHooks::Hooks
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{
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public:
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Hooks() = default;
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~Hooks()
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{
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if (mouseWheelHook != nullptr)
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UnhookWindowsHookEx (mouseWheelHook);
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if (keyboardHook != nullptr)
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UnhookWindowsHookEx (keyboardHook);
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}
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static inline std::weak_ptr<Hooks> weak;
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private:
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static LRESULT CALLBACK mouseWheelHookCallback (int nCode, WPARAM wParam, LPARAM lParam)
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{
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if (nCode >= 0 && wParam == WM_MOUSEWHEEL)
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{
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// using a local copy of this struct to support old mingw libraries
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struct MOUSEHOOKSTRUCTEX_ final : public MOUSEHOOKSTRUCT { DWORD mouseData; };
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auto& hs = *(MOUSEHOOKSTRUCTEX_*) lParam;
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if (auto* comp = Desktop::getInstance().findComponentAt ({ hs.pt.x, hs.pt.y }))
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{
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if (auto* target = static_cast<HWND> (comp->getWindowHandle()))
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{
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const ScopedThreadDPIAwarenessSetter scope { target };
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return PostMessage (target, WM_MOUSEWHEEL,
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hs.mouseData & 0xffff0000, MAKELPARAM (hs.pt.x, hs.pt.y));
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}
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}
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}
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return CallNextHookEx (getSingleton()->mouseWheelHook, nCode, wParam, lParam);
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}
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static LRESULT CALLBACK keyboardHookCallback (int nCode, WPARAM wParam, LPARAM lParam)
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{
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auto& msg = *reinterpret_cast<MSG*> (lParam);
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if (nCode == HC_ACTION && wParam == PM_REMOVE && HWNDComponentPeer::offerKeyMessageToJUCEWindow (msg))
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{
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msg = {};
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msg.message = WM_USER;
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return 0;
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}
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return CallNextHookEx (getSingleton()->keyboardHook, nCode, wParam, lParam);
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}
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HHOOK mouseWheelHook = SetWindowsHookEx (WH_MOUSE,
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mouseWheelHookCallback,
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(HINSTANCE) juce::Process::getCurrentModuleInstanceHandle(),
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GetCurrentThreadId());
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HHOOK keyboardHook = SetWindowsHookEx (WH_GETMESSAGE,
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keyboardHookCallback,
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(HINSTANCE) juce::Process::getCurrentModuleInstanceHandle(),
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GetCurrentThreadId());
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};
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auto WindowsHooks::getSingleton() -> std::shared_ptr<Hooks>
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{
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auto& weak = Hooks::weak;
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if (auto locked = weak.lock())
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return locked;
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auto strong = std::make_shared<Hooks>();
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weak = strong;
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return strong;
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}
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} // namespace juce::detail
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#endif
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