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//
// libavg - Media Playback Engine.
// Copyright (C) 2003-2014 Ulrich von Zadow
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// Current versions can be found at www.libavg.de
//
#include "Win7TouchInputDevice.h"
#include "TouchEvent.h"
#include "Player.h"
#include "AVGNode.h"
#include "TouchStatus.h"
#include "TouchEvent.h"
#include "SDLDisplayEngine.h"
#include "../base/Logger.h"
#include "../base/ObjectCounter.h"
#include "../base/Exception.h"
using namespace std;
namespace avg {
Win7TouchInputDevice* Win7TouchInputDevice::s_pInstance(0);
Win7TouchInputDevice::Win7TouchInputDevice()
: m_LastID(0)
{
s_pInstance = this;
}
Win7TouchInputDevice::~Win7TouchInputDevice()
{
SetWindowLong(m_Hwnd, GWL_WNDPROC, (LONG)m_OldWndProc);
s_pInstance = 0;
}
typedef bool (WINAPI* PRTWPROC)(HWND, ULONG);
void Win7TouchInputDevice::start()
{
#ifdef SM_DIGITIZER
AVG_TRACE(Logger::category::CONFIG, Logger::severity::INFO,
"Using Windows 7 Touch driver.");
// We need to do runtime dynamic linking for the Win7 touch functions because they
// aren't present on pre-Win7 systems.
HMODULE hUser32 = GetModuleHandle(TEXT("user32.dll"));
PRTWPROC pRegisterTouchWindowProc = (PRTWPROC) GetProcAddress(hUser32,
"RegisterTouchWindow");
if (!pRegisterTouchWindowProc) {
throw Exception(AVG_ERR_UNSUPPORTED,
"This version of windows does not support Multitouch input.");
}
m_pGetTouchInputInfoProc = (GTIIPROC) GetProcAddress(hUser32, "GetTouchInputInfo");
m_pCloseTouchInputHandleProc = (CTIHPROC) GetProcAddress(hUser32,
"CloseTouchInputHandle");
int multitouchCaps = GetSystemMetrics(SM_DIGITIZER);
if (multitouchCaps & NID_MULTI_INPUT) {
MultitouchInputDevice::start();
SDL_SysWMinfo info;
SDL_VERSION(&info.version);
int err = SDL_GetWMInfo(&info);
AVG_ASSERT(err == 1);
m_Hwnd = info.window;
bool bOk = pRegisterTouchWindowProc(m_Hwnd, TWF_FINETOUCH | TWF_WANTPALM);
AVG_ASSERT(bOk);
m_OldWndProc = (WNDPROC)SetWindowLong(m_Hwnd, GWL_WNDPROC, (LONG)touchWndSubclassProc);
m_ClientAreaOffset = calcClientAreaOffset();
} else {
throw Exception(AVG_ERR_UNSUPPORTED, "No windows 7 multitouch device connected.");
}
#else
throw Exception(AVG_ERR_UNSUPPORTED,
"Windows multitouch not supported by this version of libavg.");
#endif
}
#define MOUSEEVENTF_FROMTOUCH 0xFF515700
LRESULT APIENTRY Win7TouchInputDevice::touchWndSubclassProc(HWND hwnd, UINT uMsg,
WPARAM wParam, LPARAM lParam)
{
#ifdef SM_DIGITIZER
Win7TouchInputDevice * pThis = Win7TouchInputDevice::s_pInstance;
bool bIgnore = false;
switch(uMsg) {
case WM_TOUCH:
pThis->onTouch(hwnd, wParam, lParam);
break;
case WM_LBUTTONDOWN:
case WM_LBUTTONUP:
if (GetMessageExtraInfo() & MOUSEEVENTF_FROMTOUCH) {
// Click was generated by wisptis / Windows Touch
bIgnore = true;
}
break;
case WM_MOUSEMOVE:
// Workaround for Win7 bug: There is no way to figure out if a WM_MOUSEMOVE
// originates from a touch, so we ignore all mousemove events as long as
// something is touching the screen.
bIgnore = (pThis->getNumTouches() > 0);
break;
default:
break;
}
if (!bIgnore) {
return CallWindowProc(pThis->m_OldWndProc, hwnd, uMsg, wParam, lParam);
} else {
return 0;
}
#else
return 0;
#endif
}
void Win7TouchInputDevice::onTouch(HWND hWnd, WPARAM wParam, LPARAM lParam)
{
#ifdef SM_DIGITIZER
unsigned numInputs = LOWORD(wParam);
PTOUCHINPUT pInputs = new TOUCHINPUT[numInputs];
BOOL bOk = m_pGetTouchInputInfoProc((HTOUCHINPUT)lParam, numInputs, pInputs,
sizeof(TOUCHINPUT));
AVG_ASSERT(bOk);
RECT winRect;
bOk = GetWindowRect(m_Hwnd, &winRect);
AVG_ASSERT(bOk);
for (unsigned i = 0; i < numInputs; i++) {
TOUCHINPUT *pTouchInput = &(pInputs[i]);
IntPoint pos(int(pTouchInput->x/100+0.5), int(pTouchInput->y/100+0.5));
if (!(Player::get()->getDisplayEngine())->isFullscreen()) {
pos -= IntPoint(winRect.left, winRect.top)+m_ClientAreaOffset;
IntPoint winSize = IntPoint(Player::get()->getRootNode()->getSize());
// Restrict coords to be inside window.
pos.x = min(max(pos.x, 0), winSize.x-1);
pos.y = min(max(pos.y, 0), winSize.y-1);
}
if (pTouchInput->dwFlags & TOUCHEVENTF_DOWN) {
// cerr << "down: " << pos << endl;
m_LastID++;
TouchEventPtr pEvent (new TouchEvent(m_LastID, Event::CURSOR_DOWN, pos,
Event::TOUCH));
addTouchStatus((long)pTouchInput->dwID, pEvent);
} else if (pTouchInput->dwFlags & TOUCHEVENTF_UP) {
// cerr << "up: " << pos << endl;
TouchStatusPtr pTouchStatus = getTouchStatus(pTouchInput->dwID);
TouchEventPtr pOldEvent = pTouchStatus->getLastEvent();
TouchEventPtr pUpEvent(new TouchEvent(pOldEvent->getCursorID(),
Event::CURSOR_UP, pos, Event::TOUCH));
pTouchStatus->pushEvent(pUpEvent);
} else if (pTouchInput->dwFlags & TOUCHEVENTF_MOVE) {
// cerr << "motion: " << pos << endl;
TouchEventPtr pEvent(new TouchEvent(0, Event::CURSOR_MOTION, pos,
Event::TOUCH));
TouchStatusPtr pTouchStatus = getTouchStatus((long)pTouchInput->dwID);
AVG_ASSERT(pTouchStatus);
pTouchStatus->pushEvent(pEvent);
}
}
delete [] pInputs;
m_pCloseTouchInputHandleProc((HTOUCHINPUT)lParam);
#endif
}
IntPoint Win7TouchInputDevice::calcClientAreaOffset() const
{
// TODO: This might work for now, but the x offset should probably be SM_CXBORDER.
return IntPoint(GetSystemMetrics(SM_CYBORDER)+2, GetSystemMetrics(SM_CYCAPTION)+3);
}
}
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