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tags/2018-04-16
falkTX 10 years ago
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1 changed files with 106 additions and 0 deletions
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      libs/juce/source/modules/juce_audio_plugin_client/utility/juce_WindowsHooks.h

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libs/juce/source/modules/juce_audio_plugin_client/utility/juce_WindowsHooks.h View File

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/*
==============================================================================
This file is part of the JUCE library.
Copyright (c) 2013 - Raw Material Software Ltd.
Permission is granted to use this software under the terms of either:
a) the GPL v2 (or any later version)
b) the Affero GPL v3
Details of these licenses can be found at: www.gnu.org/licenses
JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE. See the GNU General Public License for more details.
------------------------------------------------------------------------------
To release a closed-source product which uses JUCE, commercial licenses are
available: visit www.juce.com for more information.
==============================================================================
*/
#if JUCE_WINDOWS
namespace juce
{
// This function is in juce_win32_Windowing.cpp
extern bool offerKeyMessageToJUCEWindow (MSG&);
}
namespace
{
static HHOOK mouseWheelHook = 0, keyboardHook = 0;
static int numHookUsers = 0;
struct WindowsHooks
{
WindowsHooks()
{
if (numHookUsers++ == 0)
{
mouseWheelHook = SetWindowsHookEx (WH_MOUSE, mouseWheelHookCallback,
(HINSTANCE) Process::getCurrentModuleInstanceHandle(),
GetCurrentThreadId());
keyboardHook = SetWindowsHookEx (WH_GETMESSAGE, keyboardHookCallback,
(HINSTANCE) Process::getCurrentModuleInstanceHandle(),
GetCurrentThreadId());
}
}
~WindowsHooks()
{
if (--numHookUsers == 0)
{
if (mouseWheelHook != 0)
{
UnhookWindowsHookEx (mouseWheelHook);
mouseWheelHook = 0;
}
if (keyboardHook != 0)
{
UnhookWindowsHookEx (keyboardHook);
keyboardHook = 0;
}
}
}
static LRESULT CALLBACK mouseWheelHookCallback (int nCode, WPARAM wParam, LPARAM lParam)
{
if (nCode >= 0 && wParam == WM_MOUSEWHEEL)
{
// using a local copy of this struct to support old mingw libraries
struct MOUSEHOOKSTRUCTEX_ : public MOUSEHOOKSTRUCT { DWORD mouseData; };
const MOUSEHOOKSTRUCTEX_& hs = *(MOUSEHOOKSTRUCTEX_*) lParam;
if (Component* const comp = Desktop::getInstance().findComponentAt (Point<int> (hs.pt.x, hs.pt.y)))
if (comp->getWindowHandle() != 0)
return PostMessage ((HWND) comp->getWindowHandle(), WM_MOUSEWHEEL,
hs.mouseData & 0xffff0000, (hs.pt.x & 0xffff) | (hs.pt.y << 16));
}
return CallNextHookEx (mouseWheelHook, nCode, wParam, lParam);
}
static LRESULT CALLBACK keyboardHookCallback (int nCode, WPARAM wParam, LPARAM lParam)
{
MSG& msg = *(MSG*) lParam;
if (nCode == HC_ACTION && offerKeyMessageToJUCEWindow (msg))
{
zerostruct (msg);
msg.message = WM_USER;
return 1;
}
return CallNextHookEx (keyboardHook, nCode, wParam, lParam);
}
};
}
#endif

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