windows-nt-4.0/private/windows/shell/cpls/main/mousectl.c

///////////////////////////////////////////////////////////////////////////////
//
// mousectl.c
//
//
// History:
//      11 May 95 SteveCat
//          Ported to Windows NT and Unicode, cleaned up                  
//
//
// NOTE/BUGS
//
//  Copyright (C) 1994-1995 Microsoft Corporation
//
///////////////////////////////////////////////////////////////////////////////

//==========================================================================
//                              Include files
//==========================================================================

#include "main.h"

#include "mousectl.h"
#include "rc.h"

//------------------------------------------------------------------------------

#define     LocalLockPtr( lp )            \
                ((BOOL)SELECTOROF( LocalLock( LocalHandle( lp ))))
#define     LocalUnlockPtr( lp )  \
                LocalUnlock( LocalHandle( lp ))

#define     LocalAllocPtr( flags, cb )   \
                (LocalLock( LocalAlloc((flags ), (cb ))))
#define     LocalFreePtr( lp )           \
                (LocalUnlockPtr( lp ), (BOOL)LocalFree( LocalHandle( lp )))

//------------------------------------------------------------------------------

#define MOUSECTL_BITMAP_NAME          MAKEINTRESOURCE( IDB_MOUSE )

#define MOUSECTL_DATA                 0

// these are indices into the VGA palette!
#define MOUSECTL_BKGND_INDEX          14    // light cyan
#define MOUSECTL_LBUTTON_INDEX        13    // light magenta
#define MOUSECTL_RBUTTON_INDEX        11    // light yellow
#define MOUSECTL_LBUTTON_ALTERNATE    5     // magenta
#define MOUSECTL_RBUTTON_ALTERNATE    3     // yellow

#define MOUSECTL_NORMAL_COLOR         RGB( 255, 255, 255 )

#define HALFRGB( c ) RGB( GetRValue( c )/2, GetGValue( c )/2, GetBValue( c )/2 )

//------------------------------------------------------------------------------

typedef struct tagMOUSECTLDATA
{
    HWND        window;         // window handle for this control
    BOOL        swapped;        // are the buttons swapped?

    HBITMAP     image;          // DIB section image of mouse
    HDC         imagedc;        // DC where image lives
    HBITMAP     olddcimage;     // previous inhabitant of imagedc

    POINT       offset;         // offset of bitmap in control
    SIZE        size;           // size of bitmap

} MOUSECTLDATA, *PMOUSECTLDATA;

//------------------------------------------------------------------------------

PMOUSECTLDATA CreateMouseControlData( HWND );
void DestroyMouseControlData( PMOUSECTLDATA );

LRESULT CALLBACK MouseControlWndProc( HWND, UINT, WPARAM, LPARAM );
BOOL MouseControlNCCreate( PMOUSECTLDATA, LPCREATESTRUCT );
void MouseControlNCDestroy( PMOUSECTLDATA );
void MouseControlPaint( PMOUSECTLDATA );
void MouseControlRBUp( PMOUSECTLDATA, int, int, UINT );

void MouseControlShowSwap( PMOUSECTLDATA );

//------------------------------------------------------------------------------

__inline void SetMouseControlData( HWND window, PMOUSECTLDATA ctldata )
{
    SetWindowLong( window, MOUSECTL_DATA, (LONG)ctldata );
}


__inline PMOUSECTLDATA GetMouseControlData( HWND window )
{
    return (PMOUSECTLDATA)GetWindowLong( window, MOUSECTL_DATA );
}


//------------------------------------------------------------------------------

BOOL RegisterMouseControlStuff( HINSTANCE instance )
{
    WNDCLASS wc;

    wc.style         = 0;
    wc.lpfnWndProc   = MouseControlWndProc;
    wc.cbClsExtra    = 0;
    wc.cbWndExtra    = sizeof( LONG );
    wc.hInstance     = instance;
    wc.hIcon         = NULL;
    wc.hCursor       = LoadCursor( NULL, IDC_ARROW );
    wc.hbrBackground = (HBRUSH)( COLOR_BTNFACE + 1 );
    wc.lpszMenuName  = NULL;
    wc.lpszClassName = MOUSECTL_CLASSNAME;

    return RegisterClass( &wc );
}


//------------------------------------------------------------------------------

PMOUSECTLDATA CreateMouseControlData( HWND window )
{
    PMOUSECTLDATA ctldata = (PMOUSECTLDATA) LocalAllocPtr( LHND, sizeof( MOUSECTLDATA ) );

    if( ctldata )
    {
        ctldata->window = window;
        SetMouseControlData( window, ctldata );
    }

    return ctldata;
}


void DestroyMouseControlData( PMOUSECTLDATA ctldata )
{
    if( ctldata )
    {
        SetMouseControlData( ctldata->window, 0 );

        LocalFreePtr( ctldata );
    }
}


//------------------------------------------------------------------------------

LRESULT CALLBACK
MouseControlWndProc( HWND window, UINT message, WPARAM wParam, LPARAM lParam )
{
    PMOUSECTLDATA ctldata =   ( message == WM_NCCREATE ) ?
                            CreateMouseControlData( window ) :
                            GetMouseControlData( window );

    switch( message )
    {
        // this used to handle more messages which justified a custom control
        HANDLE_MSG( ctldata, WM_NCCREATE,       MouseControlNCCreate      );
        HANDLE_MSG( ctldata, WM_NCDESTROY,      MouseControlNCDestroy     );

        HANDLE_MSG( ctldata, WM_PAINT,          MouseControlPaint         );
    }
    
    return DefWindowProc( window, message, wParam, lParam );
}


BOOL MouseControlNCCreate( PMOUSECTLDATA ctldata, LPCREATESTRUCT cs )
{
    if( !ctldata )
        return FALSE;

    ctldata->image = LoadImage( cs->hInstance, MOUSECTL_BITMAP_NAME,
                                IMAGE_BITMAP, 0, 0, LR_CREATEDIBSECTION );

    if( ctldata->image )
    {
        ctldata->imagedc = CreateCompatibleDC( NULL );

        if( ctldata->imagedc )
        {
            BITMAP bm;

            ctldata->olddcimage =
                SelectBitmap( ctldata->imagedc, ctldata->image );

            ctldata->offset.x = ctldata->offset.y = 0;

            if( GetObject( ctldata->image, sizeof( BITMAP ), &bm ) )
            {
                ctldata->size.cx  = bm.bmWidth;
                ctldata->size.cy  = bm.bmHeight;
                ctldata->offset.x = ( cs->cx - ctldata->size.cx ) / 2;
                ctldata->offset.y = ( cs->cy - ctldata->size.cy ) / 2;

                ctldata->swapped = FALSE;
                MouseControlShowSwap( ctldata );
                return TRUE;
            }

            SelectBitmap( ctldata->imagedc, ctldata->olddcimage );
            ctldata->olddcimage = NULL;
        }

        DeleteBitmap( ctldata->image );
        ctldata->image = NULL;
    }

    ctldata->olddcimage = NULL;
    ctldata->imagedc    = NULL;

    return FALSE;
}


void MouseControlNCDestroy( PMOUSECTLDATA ctldata )
{
    if( ctldata )
    {
        if( ctldata->olddcimage )
        {
            SelectBitmap( ctldata->imagedc, ctldata->olddcimage );
            ctldata->olddcimage = NULL;
        }

        if( ctldata->imagedc )
        {
            DeleteDC( ctldata->imagedc );
            ctldata->imagedc = NULL;
        }

        if( ctldata->image )
        {
            DeleteBitmap( ctldata->image );
            ctldata->image = NULL;
        }

        DestroyMouseControlData( ctldata );
    }
}


void MouseControlPaint( PMOUSECTLDATA ctldata )
{
    PAINTSTRUCT ps;
    HDC dc = BeginPaint( ctldata->window, &ps );

    BitBlt( dc, ctldata->offset.x, ctldata->offset.y,
            ctldata->size.cx, ctldata->size.cy, ctldata->imagedc,
            0, 0, SRCCOPY );

    EndPaint( ctldata->window, &ps );
}


__inline void
MouseControlSetColor( PMOUSECTLDATA ctldata, UINT index, COLORREF color )
{
    RGBQUAD rgbq =
        { GetBValue( color ), GetGValue( color ), GetRValue( color ), 0 };

    SetDIBColorTable( ctldata->imagedc, index, 1, &rgbq );
}


void MouseControlShowSwap( PMOUSECTLDATA ctldata )
{
    MouseControlSetColor( ctldata, MOUSECTL_BKGND_INDEX,
                          GetSysColor( COLOR_BTNFACE ) );

    MouseControlSetColor( ctldata,
        ctldata->swapped ? MOUSECTL_RBUTTON_INDEX : MOUSECTL_LBUTTON_INDEX,
        GetSysColor( COLOR_HIGHLIGHT ) );

    MouseControlSetColor( ctldata,
        ctldata->swapped ? MOUSECTL_RBUTTON_ALTERNATE : MOUSECTL_LBUTTON_ALTERNATE,
        HALFRGB( GetSysColor( COLOR_HIGHLIGHT ) ) );

    MouseControlSetColor( ctldata,
        ctldata->swapped? MOUSECTL_LBUTTON_INDEX : MOUSECTL_RBUTTON_INDEX,
        MOUSECTL_NORMAL_COLOR );

    MouseControlSetColor( ctldata,
        ctldata->swapped? MOUSECTL_LBUTTON_ALTERNATE : MOUSECTL_RBUTTON_ALTERNATE,
        HALFRGB( MOUSECTL_NORMAL_COLOR ) );

    InvalidateRect( ctldata->window, NULL, FALSE );
}


void MouseControlSetSwap( HWND window, BOOL swap )
{
    PMOUSECTLDATA ctldata = GetMouseControlData( window );

    if( ctldata->swapped != swap )
    {
        ctldata->swapped = swap;
        MouseControlShowSwap( ctldata );
    }
}