112 lines
3.7 KiB
C
112 lines
3.7 KiB
C
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/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2017 - ROLI Ltd.
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JUCE is an open source library subject to commercial or open-source
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licensing.
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By using JUCE, you agree to the terms of both the JUCE 5 End-User License
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Agreement and JUCE 5 Privacy Policy (both updated and effective as of the
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27th April 2017).
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End User License Agreement: www.juce.com/juce-5-licence
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Privacy Policy: www.juce.com/juce-5-privacy-policy
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Or: You may also use this code under the terms of the GPL v3 (see
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www.gnu.org/licenses).
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JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
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EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
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DISCLAIMED.
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==============================================================================
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*/
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#if JUCE_WINDOWS
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namespace juce
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{
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// This function is in juce_win32_Windowing.cpp
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extern bool offerKeyMessageToJUCEWindow (MSG&);
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namespace
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{
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static HHOOK mouseWheelHook = 0, keyboardHook = 0;
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static int numHookUsers = 0;
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struct WindowsHooks
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{
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WindowsHooks()
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{
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if (numHookUsers++ == 0)
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{
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mouseWheelHook = SetWindowsHookEx (WH_MOUSE, mouseWheelHookCallback,
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(HINSTANCE) juce::Process::getCurrentModuleInstanceHandle(),
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GetCurrentThreadId());
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keyboardHook = SetWindowsHookEx (WH_GETMESSAGE, keyboardHookCallback,
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(HINSTANCE) juce::Process::getCurrentModuleInstanceHandle(),
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GetCurrentThreadId());
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}
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}
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~WindowsHooks()
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{
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if (--numHookUsers == 0)
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{
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if (mouseWheelHook != 0)
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{
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UnhookWindowsHookEx (mouseWheelHook);
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mouseWheelHook = 0;
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}
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if (keyboardHook != 0)
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{
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UnhookWindowsHookEx (keyboardHook);
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keyboardHook = 0;
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}
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}
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}
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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_ : 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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if (comp->getWindowHandle() != 0)
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return PostMessage ((HWND) comp->getWindowHandle(), WM_MOUSEWHEEL,
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hs.mouseData & 0xffff0000, (hs.pt.x & 0xffff) | (hs.pt.y << 16));
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}
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return CallNextHookEx (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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MSG& msg = *(MSG*) lParam;
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if (nCode == HC_ACTION && wParam == PM_REMOVE
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&& offerKeyMessageToJUCEWindow (msg))
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{
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zerostruct (msg);
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msg.message = WM_USER;
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return 1;
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}
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return CallNextHookEx (keyboardHook, nCode, wParam, lParam);
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}
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};
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}
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} // juce namespace
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#endif
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