source: code/archive/Presentation_HS16/src/external/ois/win32/Win32Mouse.cpp

/*
The zlib/libpng License

Copyright (c) 2005-2007 Phillip Castaneda (pjcast -- www.wreckedgames.com)

This software is provided 'as-is', without any express or implied warranty. In no event will
the authors be held liable for any damages arising from the use of this software.

Permission is granted to anyone to use this software for any purpose, including commercial 
applications, and to alter it and redistribute it freely, subject to the following
restrictions:

    1. The origin of this software must not be misrepresented; you must not claim that 
                you wrote the original software. If you use this software in a product, 
                an acknowledgment in the product documentation would be appreciated but is 
                not required.

    2. Altered source versions must be plainly marked as such, and must not be 
                misrepresented as being the original software.

    3. This notice may not be removed or altered from any source distribution.
*/
#include "win32/Win32Mouse.h"
#include "win32/Win32InputManager.h"
#include "OISException.h"
#include "OISEvents.h"
#include <cstddef>

using namespace OIS;

//--------------------------------------------------------------------------------------------------//
Win32Mouse::Win32Mouse( InputManager* creator, IDirectInput8* pDI, bool buffered, DWORD coopSettings )
        : Mouse(creator->inputSystemName(), buffered, 0, creator)
{
        mMouse = 0;
        mDirectInput = pDI;
        coopSetting = coopSettings;
        mHwnd = 0;

        static_cast<Win32InputManager*>(mCreator)->_setMouseUsed(true);
}

//--------------------------------------------------------------------------------------------------//
void Win32Mouse::_initialize()
{
        DIPROPDWORD dipdw;

        //Clear old state
        mState.clear();

    dipdw.diph.dwSize       = sizeof(DIPROPDWORD);
    dipdw.diph.dwHeaderSize = sizeof(DIPROPHEADER);
    dipdw.diph.dwObj        = 0;
    dipdw.diph.dwHow        = DIPH_DEVICE;
        dipdw.dwData            = MOUSE_DX_BUFFERSIZE;
        
        if( FAILED(mDirectInput->CreateDevice(GUID_SysMouse, &mMouse, NULL)) )
                OIS_EXCEPT( E_General, "Win32Mouse::Win32Mouse >> Failed to create device" );

        if( FAILED(mMouse->SetDataFormat(&c_dfDIMouse2)) )
                OIS_EXCEPT( E_General, "Win32Mouse::Win32Mouse >> Failed to set format" );
        
        mHwnd = ((Win32InputManager*)mCreator)->getWindowHandle();

        if( FAILED(mMouse->SetCooperativeLevel(mHwnd, coopSetting)) )
                OIS_EXCEPT( E_General, "Win32Mouse::Win32Mouse >> Failed to set coop level" );
        
        if( FAILED(mMouse->SetProperty(DIPROP_BUFFERSIZE, &dipdw.diph )) )
                OIS_EXCEPT( E_General, "Win32Mouse::Win32Mouse >> Failed to set property" );

        HRESULT hr = mMouse->Acquire();
        if (FAILED(hr) && hr != DIERR_OTHERAPPHASPRIO)
                OIS_EXCEPT( E_General, "Win32Mouse::Win32Mouse >> Failed to aquire mouse!" );
}

//--------------------------------------------------------------------------------------------------//
Win32Mouse::~Win32Mouse()
{
        if (mMouse)
        {
                mMouse->Unacquire();
                mMouse->Release();
                mMouse = 0;
        }

        static_cast<Win32InputManager*>(mCreator)->_setMouseUsed(false);
}

//--------------------------------------------------------------------------------------------------//
void Win32Mouse::capture()
{
        //Clear old relative values
        mState.X.rel = mState.Y.rel = mState.Z.rel = 0;

        DIDEVICEOBJECTDATA diBuff[MOUSE_DX_BUFFERSIZE];
        DWORD entries = MOUSE_DX_BUFFERSIZE;

        HRESULT hr = mMouse->GetDeviceData( sizeof(DIDEVICEOBJECTDATA), diBuff, &entries, 0 );
        if( hr != DI_OK )
        {
                hr = mMouse->Acquire();
                while( hr == DIERR_INPUTLOST ) 
                        hr = mMouse->Acquire();

                hr = mMouse->GetDeviceData( sizeof(DIDEVICEOBJECTDATA), diBuff, &entries, 0 );
                
                //Perhaps the user just tabbed away, and coop settings
                //are nonexclusive..so just ignore
                if( FAILED(hr) )
                        return;
        }

        bool axesMoved = false;
        //Accumulate all axis movements for one axesMove message..
        //Buttons are fired off as they are found
        for(unsigned int i = 0; i < entries; ++i )
        {
                switch( diBuff[i].dwOfs )
                {
                        case DIMOFS_BUTTON0:
                                if(!_doMouseClick(0, diBuff[i])) return;
                                break;
                        case DIMOFS_BUTTON1:
                                if(!_doMouseClick(1, diBuff[i])) return;
                                break;
                        case DIMOFS_BUTTON2:
                                if(!_doMouseClick(2, diBuff[i])) return;
                                break;
                        case DIMOFS_BUTTON3:
                                if(!_doMouseClick(3, diBuff[i])) return;
                                break;
                        case DIMOFS_BUTTON4:
                                if(!_doMouseClick(4, diBuff[i])) return;
                                break;  
                        case DIMOFS_BUTTON5:
                                if(!_doMouseClick(5, diBuff[i])) return;
                                break;
                        case DIMOFS_BUTTON6:
                                if(!_doMouseClick(6, diBuff[i])) return;
                                break;
                        case DIMOFS_BUTTON7:
                                if(!_doMouseClick(7, diBuff[i])) return;
                                break;
                        case DIMOFS_X:
                                mState.X.rel += diBuff[i].dwData;
                                axesMoved = true;
                                break;
                        case DIMOFS_Y:
                                mState.Y.rel += diBuff[i].dwData;
                                axesMoved = true;
                                break;
                        case DIMOFS_Z:
                                mState.Z.rel += diBuff[i].dwData;
                                axesMoved = true;
                                break;
                        default: break;
                } //end switch
        }//end for

        if( axesMoved )
        {
                if( coopSetting & DISCL_NONEXCLUSIVE )
                {
                        //DirectInput provides us with meaningless values, so correct that
                        POINT point;
                        GetCursorPos(&point);
                        ScreenToClient(mHwnd, &point);
                        mState.X.abs = point.x;
                        mState.Y.abs = point.y;
                }
                else
                {
                        mState.X.abs +=  mState.X.rel;
                        mState.Y.abs +=  mState.Y.rel;
                }
                mState.Z.abs +=  mState.Z.rel;

                //Clip values to window
                if( mState.X.abs < 0 )
                        mState.X.abs = 0;
                else if( mState.X.abs > mState.width )
                        mState.X.abs = mState.width;
                if( mState.Y.abs < 0 )
                        mState.Y.abs = 0;
                else if( mState.Y.abs > mState.height )
                        mState.Y.abs = mState.height;

                //Do the move
                if( mListener && mBuffered )
                        mListener->mouseMoved( MouseEvent( this, mState ) );
        }
}

//--------------------------------------------------------------------------------------------------//
bool Win32Mouse::_doMouseClick( int mouseButton, DIDEVICEOBJECTDATA& di )
{
        if( di.dwData & 0x80 )
        {
                mState.buttons |= 1 << mouseButton; //turn the bit flag on
                if( mListener && mBuffered )
                        return mListener->mousePressed( MouseEvent( this, mState ), (MouseButtonID)mouseButton );
        }
        else
        {
                mState.buttons &= ~(1 << mouseButton); //turn the bit flag off
                if( mListener && mBuffered )
                        return mListener->mouseReleased( MouseEvent( this, mState ), (MouseButtonID)mouseButton );
        }

        return true;
}

//--------------------------------------------------------------------------------------------------//
void Win32Mouse::setBuffered(bool buffered)
{
        mBuffered = buffered;
}