inputsystem: touch event handling

inputsystem/touch_sdl.cpp

@@ -0,0 +1,98 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: Linux/Android touch implementation for inputsystem
+//
+//===========================================================================//
+
+/* For force feedback testing. */
+#include "inputsystem.h"
+#include "tier1/convar.h"
+#include "tier0/icommandline.h"
+#include "SDL.h"
+#include "SDL_touch.h"
+// NOTE: This has to be the last file included!
+#include "tier0/memdbgon.h"
+
+//-----------------------------------------------------------------------------
+// Handle the events coming from the Touch SDL subsystem.
+//-----------------------------------------------------------------------------
+int TouchSDLWatcher( void *userInfo, SDL_Event *event )
+{
+	CInputSystem *pInputSystem = (CInputSystem *)userInfo;
+
+	SDL_Window *window = SDL_GetWindowFromID(event->tfinger.windowID);
+	if( !window )
+		return 0;
+	
+	int width, height;
+	width = height = 0;
+	SDL_GetWindowSize(window, &width, &height);
+	
+	switch ( event->type ) {
+	case SDL_FINGERDOWN:
+		pInputSystem->FingerDown( event->tfinger.fingerId, event->tfinger.x*width, event->tfinger.y*height );
+		break;
+	case SDL_FINGERUP:
+		pInputSystem->FingerUp( event->tfinger.fingerId, event->tfinger.x*width, event->tfinger.y*height );
+		break;
+	case SDL_FINGERMOTION:
+		pInputSystem->FingerMotion( event->tfinger.fingerId, event->tfinger.x*width, event->tfinger.y*height );
+		break;
+	}
+
+	return 1;
+}
+
+//-----------------------------------------------------------------------------
+// Initialize all joysticks
+//-----------------------------------------------------------------------------
+void CInputSystem::InitializeTouch( void )
+{
+	if ( m_bTouchInitialized )
+		ShutdownTouch();
+
+	// abort startup if user requests no touch
+	if ( CommandLine()->FindParm("-notouch") ) return;
+
+	m_bJoystickInitialized = true;
+	SDL_AddEventWatch(TouchSDLWatcher, this);
+}
+
+void CInputSystem::ShutdownTouch()
+{
+	if ( !m_bTouchInitialized )
+		return;
+
+	SDL_DelEventWatch( TouchSDLWatcher, this );
+	m_bTouchInitialized = false;
+}
+
+void CInputSystem::FingerDown(int fingerId, int x, int y)
+{
+	m_touchAccumEvent = IE_FingerDown;
+	m_touchAccumFingerId = fingerId;
+	m_touchAccumX = x;
+	m_touchAccumY = y;
+	
+	PostEvent(IE_FingerDown, m_nLastSampleTick, fingerId, x, y);
+}
+
+void CInputSystem::FingerUp(int fingerId, int x, int y)
+{
+	m_touchAccumEvent = IE_FingerUp;
+	m_touchAccumFingerId = fingerId;
+	m_touchAccumX = x;
+	m_touchAccumY = y;
+	
+	PostEvent(IE_FingerUp, m_nLastSampleTick, fingerId, x, y);	
+}
+
+void CInputSystem::FingerMotion(int fingerId, int x, int y)
+{
+	m_touchAccumEvent = IE_FingerMotion;	
+	m_touchAccumFingerId = fingerId;
+	m_touchAccumX = x;
+	m_touchAccumY = y;
+	
+	PostEvent(IE_FingerMotion, m_nLastSampleTick, fingerId, x, y);	
+}