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107 lines
3.7 KiB
107 lines
3.7 KiB
/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2013 - Raw Material Software Ltd.
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Permission is granted to use this software under the terms of either:
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a) the GPL v2 (or any later version)
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b) the Affero GPL v3
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Details of these licenses can be found at: www.gnu.org/licenses
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JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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------------------------------------------------------------------------------
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To release a closed-source product which uses JUCE, commercial licenses are
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available: visit www.juce.com for more information.
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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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}
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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) Process::getCurrentModuleInstanceHandle(),
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GetCurrentThreadId());
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keyboardHook = SetWindowsHookEx (WH_GETMESSAGE, keyboardHookCallback,
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(HINSTANCE) 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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const MOUSEHOOKSTRUCTEX_& hs = *(MOUSEHOOKSTRUCTEX_*) lParam;
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if (Component* const comp = Desktop::getInstance().findComponentAt (Point<int> (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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#endif
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