/****************************************************************************
*
*                            Open Watcom Project
*
*    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
*
*  ========================================================================
*
*    This file contains Original Code and/or Modifications of Original
*    Code as defined in and that are subject to the Sybase Open Watcom
*    Public License version 1.0 (the 'License'). You may not use this file
*    except in compliance with the License. BY USING THIS FILE YOU AGREE TO
*    ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
*    provided with the Original Code and Modifications, and is also
*    available at www.sybase.com/developer/opensource.
*
*    The Original Code and all software distributed under the License are
*    distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
*    EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
*    ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
*    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
*    NON-INFRINGEMENT. Please see the License for the specific language
*    governing rights and limitations under the License.
*
*  ========================================================================
*
* Description:  WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
*               DESCRIBE IT HERE!
*
****************************************************************************/


#define STRICT
#include <windows.h>
#include <string.h>
#include <assert.h>
#include "mem.h"
#include "toolbr.h"
#include "win1632.h"

typedef struct tool {
    struct tool *next;
    union {
        HBITMAP bitmap;
        WORD    blank_space;
    };
    HBITMAP     depressed;
    UINT        id;
    UINT        flags;
    WORD        state;
    RECT        area;
} tool;

typedef struct toolbar {
    HWND        hwnd;
    HWND        owner;
    toolhook    hook;
    helphook    helphook;
    POINT       button_size;
    POINT       border;
    HBITMAP     background;
    HBRUSH      foreground;
    HBRUSH      bgbrush;
    int         border_width;
    tool        *tool_list;
    char        is_fixed:1;
    char        spare:7;
} toolbar;

#define HNULL                   0

#define BORDER_WIDTH( bar )     1

#ifdef __WINDOWS_386__
    #define __FAR__     __far
    #define MAKEPTR( a ) ((void far *)MK_FP32( (void *) a ))
#else
    #define __FAR__
    #define MAKEPTR( a ) ((LPVOID) a)
#endif

#if defined(__WINDOWS_386__)
    #define WINEXP FAR PASCAL
#elif defined(__NT__)
    #define WINEXP __export __stdcall
#else
    #define WINEXP __export FAR PASCAL
#endif

#define BLANK_SIZE( w ) ( (w) / 3 )

#define GET_INFO( w )   ((toolbar *)GetWindowLong( w, 0 ))
#define SET_INFO( w,i ) (SetWindowLong( w, 0, (LONG)(LPSTR)i))

static char     *className = "WTool";

static char     gdiObjectsCreated;
static HPEN     blackPen;
static HPEN     btnShadowPen;
static HPEN     btnHighlightPen;
static HPEN     btnFacePen;
static HBRUSH   blackBrush;
static HBRUSH   btnFaceBrush;

static tool             *currTool;
static char             currIsDown;
static WORD             lastID = -1;
static BOOL             mouse_captured = FALSE;
static BOOL             ignore_mousemove = FALSE; // release_capture generates
                                                  // a WM_MOUSEMOVE msg

LONG WINEXP ToolBarWndProc( HWND, unsigned, UINT, LONG );

/*
 * findTool - find tool item based on id
 */
static tool *findTool( tool *list, WORD id )
{
    while( list != NULL ) {
        if( list->id == id ) break;
        list = list->next;
    }
    return( list );

} /* findTool */

/*
 * addTool - add an item to the tool bar list
 */
static void addTool( tool **list, tool *t )
{
    tool        *curr, **last;

    last = list;
    for( curr = *list; curr != NULL; curr = curr->next ) {
        last = &curr->next;
    }
    *last = t;
    t->next = NULL;

} /* addTool */

/*
 * deleteTool - delete an item from the tool bar list
 */
static void deleteTool( tool **list, tool *t )
{
    tool        *curr, **last;

    last = list;
    for( curr = *list; curr != NULL; curr = curr->next ) {
        if( curr == t ) {
            *last = t->next;
            t->next = NULL;
            break;
        }
        last = &curr->next;
    }

} /* deleteTool */

/*
 * buttonPosition - get position of a button on the tool bar
 */
static BOOL buttonPosition( HWND hwnd, toolbar *bar, tool *top, POINT *p )
{
    RECT        rect;
    int         width, height;
    tool        *curr;
    POINT       pos;

    GetClientRect( hwnd, &rect );
    width = rect.right - rect.left - 2 * bar->border.x;
    height = rect.bottom - rect.top - 2 * bar->border.y;
    curr = bar->tool_list;
    pos.y = 0;
    while( pos.y + bar->button_size.y <= height ) {
        pos.x = 0;
        while( pos.x + bar->button_size.x <= width ) {
            // we assert curr because top MUST be in the list - the only
            // way curr can be NULL is if top is NULL (bad) or not in the
            // list (also bad).
            assert( curr != NULL );
            if( curr == top ) {
                p->x = pos.x + bar->border.x;
                p->y = pos.y + bar->border.y;
                return( TRUE );
            }
            if( curr->flags & ITEM_BLANK ) {
                pos.x += curr->blank_space;
            } else {
                pos.x += bar->button_size.x-1;
            }
            curr = curr->next;
        }
        pos.y += bar->button_size.y-1;
    }
    return( FALSE );

} /* buttonPosition */

/*
 * createButtonList - create all buttons on a tool bar
 */
static void createButtonList( HWND hwnd, toolbar *bar, tool *top )
{
    POINT       pos;

    // top must be an element in the tool_list hanging off of bar
    // we are going to create buttons for all the tools from top
    // to the end of the list
    while( top != NULL ) {
        if( !buttonPosition( hwnd, bar, top, &pos ) ) {
            // no more buttons will fit
            break;
        }
        top->area.top = pos.y;
        top->area.left = pos.x;
        top->area.bottom = pos.y + bar->button_size.y;
        top->area.right = pos.x + bar->button_size.x;
        top = top->next;
    }

} /* createButtonList */

void ToolBarRedrawButtons( struct toolbar *bar )
{
    if( bar ) {
        createButtonList( bar->hwnd, bar, bar->tool_list );
    }
}

/*
 * ToolBarInit - initialize the tool bar
 */
toolbar *ToolBarInit( HWND parent )
{
    WNDCLASS    wc;
    toolbar     *bar;
    HANDLE      instance;

    instance = GET_HINSTANCE( parent );

    if( !GetClassInfo( instance, className, &wc ) ) {
        wc.style = CS_DBLCLKS;
        wc.lpfnWndProc = ToolBarWndProc;
        wc.lpszMenuName = NULL;
        wc.cbClsExtra = 0;
        wc.cbWndExtra = sizeof( LPVOID );
        wc.hInstance = instance;
        wc.hIcon = HNULL;
        wc.hCursor = LoadCursor( (HANDLE) HNULL, IDC_ARROW );
        wc.hbrBackground = (HBRUSH) 0;
        wc.lpszMenuName = NULL;
        wc.lpszClassName = className;
        RegisterClass( &wc );
    }
    bar = (toolbar *)MemAlloc( sizeof( toolbar ) );
    if ( bar ) {
        bar->border_width = 1;
        bar->owner = parent;
    }

    if( !gdiObjectsCreated ) {
        blackPen = CreatePen( PS_SOLID, BORDER_WIDTH( bar ), RGB( 0, 0, 0 ) );
        btnShadowPen = CreatePen( PS_SOLID, BORDER_WIDTH( bar ),
                                GetSysColor( COLOR_BTNSHADOW ) );
        btnHighlightPen = CreatePen( PS_SOLID, BORDER_WIDTH( bar ),
                                GetSysColor( COLOR_BTNHIGHLIGHT ) );
        btnFacePen = CreatePen( PS_SOLID, BORDER_WIDTH( bar ),
                                GetSysColor( COLOR_BTNFACE ) );
        blackBrush = GetStockObject( BLACK_BRUSH );
        btnFaceBrush = CreateSolidBrush( GetSysColor( COLOR_BTNFACE ) );
        gdiObjectsCreated = TRUE;
    }

    return( bar );

} /* ToolBarInit */

/*
 * ToolBarChangeSysColors - fiddle with what ToolBar believes
 *                          are the system colours
 */
void ToolBarChangeSysColors( COLORREF tbFace,
                             COLORREF tbHighlight, COLORREF tbShadow )
{
    if( gdiObjectsCreated ) {
        DeleteObject( btnShadowPen );
        DeleteObject( btnHighlightPen );
        DeleteObject( btnFacePen );
        DeleteObject( btnFaceBrush );
    }

    btnShadowPen = CreatePen( PS_SOLID, BORDER_WIDTH( bar ), tbShadow );
    btnHighlightPen = CreatePen( PS_SOLID, BORDER_WIDTH( bar ), tbHighlight );
    btnFacePen = CreatePen( PS_SOLID, BORDER_WIDTH( bar ), tbFace );
    btnFaceBrush = CreateSolidBrush( tbFace );
    gdiObjectsCreated = TRUE;
}

/*
 * ToolBarDestroy - done with the tool bar
 */
void ToolBarDestroy ( toolbar *bar )
{
    tool        *curr, *tmp;

    if ( bar ) {
        if( bar->hwnd != HNULL ) {
            DestroyWindow( bar->hwnd );
        }
        curr = bar->tool_list;
        while( curr != NULL ) {
            tmp = curr;
            curr = curr->next;
            MemFree( tmp );
        }
        if( bar->bgbrush != NULL ) {
            DeleteObject( bar->bgbrush );
        }
        MemFree( bar );
    }

}

/*
 * ToolBarFini - done with all tool bars
 */
void ToolBarFini( toolbar *bar )
{
    ToolBarDestroy ( bar );

    if( gdiObjectsCreated ) {
        DeleteObject( blackPen );
        DeleteObject( btnShadowPen );
        DeleteObject( btnHighlightPen );
        DeleteObject( btnFacePen );
        DeleteObject( blackBrush );
        DeleteObject( btnFaceBrush );
        gdiObjectsCreated = FALSE;
    }

} /* ToolBarFini */

/*
 * ToolBarAddItem - add a specific bitmap to the tool bar
 */
void ToolBarAddItem( toolbar *bar, TOOLITEMINFO *info )
{
    tool        *t;

    t = (tool *)MemAlloc( sizeof( tool ) );
    if( info->flags & ITEM_BLANK ) {
        t->blank_space = info->blank_space;
    } else {
        t->bitmap = info->bmp;
    }
    t->id = info->id;
    t->next = NULL;
    t->flags = info->flags;
    t->depressed = info->depressed;
    t->state = BUTTON_UP;
    addTool( &bar->tool_list, t );
    if( !(info->flags & ITEM_BLANK) && info->bmp != HNULL ) {
        createButtonList( bar->hwnd, bar, t );
    }

} /* ToolBarAddItem */

void ToolBarSetState( toolbar *bar, WORD id, WORD state )
{
    tool        *t;

    t = findTool( bar->tool_list, id );
    t->state = state;
    // force the button to be redrawn
    InvalidateRect( bar->hwnd, &t->area, FALSE );
}

WORD ToolBarGetState( toolbar *bar, WORD id )
{
    tool        *t;

    t = findTool( bar->tool_list, id );
    return( t->state );
}

/*
 * ToolBarDeleteItem - delete an item from the tool bar
 */
BOOL ToolBarDeleteItem( toolbar *bar, WORD id )
{
    tool        *t, *next;

    t = findTool( bar->tool_list, id );
    if( t != NULL ) {
        // need to destroy the window on the tool bar and recreate
        // all the other tools after this one
        next = t->next;
        deleteTool( &bar->tool_list, t );
        createButtonList( bar->hwnd, bar, next );
        return( TRUE );
    }
    return( FALSE );

} /* ToolBarDeleteItem */

/*
 * ToolBarDisplay - create and show the tool bar
 */
void ToolBarDisplay( toolbar *bar, TOOLDISPLAYINFO *disp )
{
    int         height, width;

    currTool = NULL;
    currIsDown = FALSE;
    lastID = -1;
    mouse_captured = FALSE;

    if( bar->bgbrush != NULL ) {
        DeleteObject( bar->bgbrush );
        bar->bgbrush = NULL;
    }
    if( disp->background != NULL ) {
        bar->bgbrush = CreatePatternBrush( disp->background );
    }

    if( bar->hwnd != HNULL ) {
        DestroyWindow( bar->hwnd );
    }
    bar->button_size = disp->button_size;
    bar->hook = disp->hook;
    bar->helphook = disp->helphook;
    bar->border = disp->border_size;
    bar->background = disp->background;
    bar->foreground = disp->foreground;
    bar->is_fixed = disp->is_fixed;
    width = disp->area.right - disp->area.left;
    height = disp->area.bottom - disp->area.top;
    CreateWindow( className, NULL, disp->style,
        disp->area.left, disp->area.top, width, height,
        bar->owner, (HMENU) HNULL, GET_HINSTANCE( bar->owner ), bar );
    /*
     * Windows ignores the GETMINMAXINFO before the WM_CREATE or
     * something so we kluge it.
     */
    MoveWindow( bar->hwnd, disp->area.left, disp->area.top,
                                                width, height, TRUE );
} /* ToolBarDisplay */

/*
 * ToolBarWindow - return a handle to the toolbar window
 */
HWND ToolBarWindow( toolbar *bar )
{
    if( bar == NULL ) {
        return( HNULL );
    }
    return( bar->hwnd );

} /* ToolBarWindow */

/*
 * UpdateToolBar - update our tool bar
 */
void UpdateToolBar( toolbar *bar )
{
    InvalidateRect( bar->hwnd, NULL, TRUE );
    UpdateWindow( bar->hwnd );

} /* UpdateToolBar */

/*
 * drawTopLeftCorner - draws the top left corner of a button
 */
static void drawTopLeftCorner( HDC hdc, POINT size, int border, HPEN pen )

{
    HPEN        old_pen;

    old_pen = SelectObject( hdc, pen );
    MoveToEx( hdc, border, size.y - 2*border, NULL );
    LineTo( hdc, border, border );
    LineTo( hdc, size.x - border, border );
    SelectObject( hdc, old_pen );

} /* drawTopLeftCorner */

/*
 * drawTopLeftInsideCorner - draws the top left corner of a button
 */
static void drawTopLeftInsideCorner( HDC hdc, POINT size, int border, HPEN pen )

{
    HPEN        old_pen;

    old_pen = SelectObject( hdc, pen );
    MoveToEx( hdc, border*2, size.y - 2*border, NULL );
    LineTo( hdc, border*2, border*2 );
    LineTo( hdc, size.x - border, border*2 );
    SelectObject( hdc, old_pen );

} /* drawTopLeftCorner */

/*
 * drawBottomRightCorner - draws the bottom right corner of a button
 */
static void drawBottomRightCorner( HDC hdc, POINT size, int border, HPEN pen )
{
    HPEN        old_pen;

    size.x -= 2*border;
    size.y -= 2*border;
    old_pen = SelectObject( hdc, pen );
    MoveToEx( hdc, size.x, border, NULL );
    LineTo( hdc, size.x, size.y );
    LineTo( hdc, border-1, size.y );
    SelectObject( hdc, old_pen );

} /* drawBottomRightCorner */

/*
 * drawBottomRightInsideCorner - draw the inside corner of a button
 */
static void drawBottomRightInsideCorner( HDC hdc, POINT size, int border, HPEN pen )
{
    HPEN        old_pen;

    size.x -= 3*border;
    size.y -= 3*border;
    old_pen = SelectObject( hdc, pen );
    MoveToEx( hdc, 2*border, size.y, NULL );
    LineTo( hdc, size.x, size.y );
    LineTo( hdc, size.x, border );
    SelectObject( hdc, old_pen );

} /* drawBottomRightInsideCorner */

/*
 * drawBorder - draw to border of a button
 */
static void drawBorder( HDC hdc, POINT size, int border )
{
    HPEN        old_pen;
    int         y,x;

    y = size.y-1;
    x = size.x-1;

    old_pen = SelectObject( hdc, blackPen );

    MoveToEx( hdc, 0, 0, NULL );
    LineTo( hdc, x, 0 );
    LineTo( hdc, x, y );
    LineTo( hdc, 0, y );
    LineTo( hdc, 0, 0 );

    SelectObject( hdc, btnFacePen );
    MoveToEx( hdc, 0, 0, NULL );
    LineTo( hdc, border, 0 );
    MoveToEx( hdc, x, 0, NULL );
    LineTo( hdc, x, border );
    MoveToEx( hdc, x, y, NULL );
    LineTo( hdc, x-border, y );
    MoveToEx( hdc, 0, y, NULL );
    LineTo( hdc, 0, y-border );

    SelectObject( hdc, old_pen );

} /* drawBorder */

/*
 * toolBarDrawBitmap - draw the bitmap on a button
 */
static void toolBarDrawBitmap( HDC hdc, POINT dst_size, POINT dst_org,
                        HBITMAP bitmap )
{
    BITMAP      bm;
    HDC         memdc;
    POINT       src_org, src_size;
    HBRUSH      old_brush;
    HBITMAP     old_bmp;

    DPtoLP( hdc, &dst_size, 1 );
    DPtoLP( hdc, &dst_org, 1 );

    memdc = CreateCompatibleDC( hdc );
    old_bmp = SelectObject( memdc, bitmap );

    GetObject( bitmap, sizeof( BITMAP ), &bm );

    src_size.x = bm.bmWidth;
    src_size.y = bm.bmHeight;
    DPtoLP( hdc, &src_size, 1 );

    src_org.x = 0;
    src_org.y = 0;
    DPtoLP( hdc, &src_org, 1 );

    #ifdef __NT__
        SetStretchBltMode( hdc, COLORONCOLOR );
    #else
        SetStretchBltMode( hdc, STRETCH_DELETESCANS );
    #endif

    /*
     * If it's a monochrome bitmap try and do the right thing - I can see
     * this pissing off some users, but oh well.
     */
    if( bm.bmBitsPixel == 1 && bm.bmPlanes == 1 ) {
        old_brush = SelectObject( hdc, blackBrush );

        StretchBlt( hdc, dst_org.x, dst_org.y, dst_size.x, dst_size.y,
            memdc, src_org.x, src_org.y, src_size.x, src_size.y, 0xb8074a );

        if( old_bmp != HNULL ) {
            SelectObject( memdc, old_bmp );
        }

        SelectObject( hdc, old_brush );
    } else {
        StretchBlt( hdc, dst_org.x, dst_org.y, dst_size.x, dst_size.y,
            memdc, src_org.x, src_org.y, src_size.x, src_size.y, SRCCOPY );

        if( old_bmp != HNULL ) {
            SelectObject( memdc, old_bmp );
        }
    }
    DeleteDC( memdc );

} /* toolBarDrawBitmap */

/*
 * drawButton - draw a button on the toolbar
 */
static void drawButton( HDC hdc, HWND hwnd, tool *tool, BOOL down )
{
    toolbar     *bar;
    HBRUSH      brush;
    HBITMAP     bitmap, oldbmp;
    HDC         mem;
    int         shift;
    BOOL        selected;
    BOOL        got_dc;
    POINT       dst_size;
    POINT       dst_org;
    HBITMAP     used_bmp;

    if( tool->flags & ITEM_BLANK ) {
        return;
    }

    /* draw the button */
    bar = GET_INFO( hwnd );

    if( tool->flags & ITEM_STICKY ) {
        selected = (tool->state == BUTTON_DOWN);
    } else {
        selected = down;
    }
    shift = 0;
    if( selected ) {
        shift = 2*BORDER_WIDTH( bar );
    }

    got_dc = FALSE;
    if( hdc == (HDC)NULL ) {
        hdc = GetDC( hwnd );
        got_dc = TRUE;
    }
    mem = CreateCompatibleDC( hdc );
    bitmap = CreateCompatibleBitmap( hdc,
                bar->button_size.x, bar->button_size.y );
    oldbmp = SelectObject( mem, bitmap );

    brush = btnFaceBrush;
    if( selected && bar->bgbrush != HNULL ) {
        brush = bar->bgbrush;
    }
    FillRect( mem, &tool->area, brush );

    dst_size = bar->button_size;
    dst_size.x -= 4 * BORDER_WIDTH( bar );
    dst_size.y -= 4 * BORDER_WIDTH( bar );
    dst_org.x = (1 * BORDER_WIDTH( bar ))+shift;
    dst_org.y = (1 * BORDER_WIDTH( bar ))+shift;
    used_bmp = tool->bitmap;
    if( selected ) {
        // if the button is selected and it has the ITEM_DOWNBMP flag
        // then we draw the alternate bitmap instead.
        if( tool->flags & ITEM_DOWNBMP ) {
            used_bmp = tool->depressed;
        }
    }
    toolBarDrawBitmap( mem, dst_size, dst_org, used_bmp );

    drawBorder( mem, bar->button_size, BORDER_WIDTH( bar ) );
    if( selected ) {
        drawTopLeftCorner( mem, bar->button_size, BORDER_WIDTH( bar ),
                btnShadowPen );
        drawTopLeftInsideCorner( mem, bar->button_size, BORDER_WIDTH( bar ),
                btnFacePen );
    } else {
        drawTopLeftCorner( mem, bar->button_size, BORDER_WIDTH( bar ),
                btnHighlightPen );
        drawBottomRightCorner( mem, bar->button_size, BORDER_WIDTH( bar ),
                btnShadowPen );
        drawBottomRightInsideCorner( mem, bar->button_size, BORDER_WIDTH( bar ),
                btnShadowPen );

    }
    BitBlt( hdc, tool->area.left, tool->area.top,
            bar->button_size.x, bar->button_size.y,
            mem, 0, 0, SRCCOPY ); /* copy it to screen */
    if( oldbmp != HNULL ) {
        SelectObject( mem, oldbmp );
    }
    if( got_dc ) {
        ReleaseDC( hwnd, hdc );
    }
    DeleteObject( bitmap );
    DeleteDC( mem );

} /* drawButton */

/*
 * isPointInToolbar - is the point in the mousemove message in the toolbar
 */
BOOL isPointInToolbar( HWND hwnd, WPARAM wparam, LPARAM lparam )
{
    POINT       p;
    RECT        r;

    wparam = wparam;

    MAKE_POINT( p, lparam );
    GetClientRect( hwnd, &r );
    if( PtInRect( &r, p ) ) {
        return( TRUE );
    }
    return( FALSE );
} /* isPointInToolbar */

/*
 * findToolAtPoint - find a tool at a given point
 */
static tool *findToolAtPoint( toolbar *bar, LPARAM lparam )
{
    POINT       p;
    tool        *tool;

    p.x = LOWORD( lparam );
    p.y = HIWORD( lparam );
    for( tool = bar->tool_list; tool != NULL; tool = tool->next ) {
        if( PtInRect( &tool->area, p ) ) {
            if( tool->flags & ITEM_BLANK ) {
                return( NULL );
            } else {
                return( tool );
            }
        }
    }
    return( NULL );

} /* findToolAtPoint */

/*
 * HasToolAtPoint - return TRUE if tool exists at a given point
 */
BOOL HasToolAtPoint( struct toolbar *bar, LPARAM lparam )
{
    return( findToolAtPoint( bar, lparam ) != NULL );

} /* HasToolAtPoint */

/*
 * FindToolIDAtPoint - Find the toolID at a given point, if any.  Returns
 * TRUE if tool exists at a given point.
 */
BOOL FindToolIDAtPoint( struct toolbar *bar, LPARAM lparam, UINT *id )
{
    tool *ctool;

    ctool = findToolAtPoint( bar, lparam );
    if( ctool != NULL ) {
        *id = ctool->id;
        return TRUE;
    } else {
        return FALSE;
    }
}

/*
 * ToolBarWndProc - callback routine for the tool bar
 */
LONG WINEXP ToolBarWndProc( HWND hwnd, unsigned msg, UINT wparam, LONG lparam )
{
    CREATESTRUCT        __FAR__ *cs;
    toolbar             *bar;
    tool                *tool;
    RECT                inter;
    HDC                 hdc;
    PAINTSTRUCT         ps;
    BOOL                posted;

    bar = GET_INFO( hwnd );
    if( msg == WM_CREATE ) {
        cs = MAKEPTR( lparam );
        bar = cs->lpCreateParams;
        #ifdef __WINDOWS_386__
            bar = MapAliasToFlat( (DWORD) bar );
        #endif
        bar->hwnd = hwnd;
        SET_INFO( hwnd, bar );
    }
    if( bar != NULL && bar->hook != NULL ) {
        if( bar->hook( hwnd, msg, wparam, lparam ) && msg != WM_DESTROY ) {
            return( 0L );
        }
    }
    switch( msg ) {
    case WM_SIZE:
        if( bar && bar->tool_list && !bar->is_fixed ) {
            createButtonList( hwnd, bar, bar->tool_list );
            InvalidateRect( hwnd, NULL, TRUE );
            UpdateWindow( hwnd );
        }
        break;
    case WM_RBUTTONDOWN:
    case WM_RBUTTONDBLCLK:
    case WM_LBUTTONDOWN:
    case WM_LBUTTONDBLCLK:
        if( bar && bar->tool_list ) {
            currTool = NULL;
            tool = findToolAtPoint( bar, lparam );
            if( tool ) {
                if( bar->hook != NULL ) {
                    bar->hook( hwnd, WM_USER, tool->id, 0L );
                }
                currTool = tool;
                drawButton( (HDC)NULL, hwnd, tool, TRUE );
                mouse_captured = TRUE;
                SetCapture( hwnd );
                currIsDown = TRUE;
                if( bar->helphook != NULL ) {
                    bar->helphook( hwnd, currTool->id, TRUE );
                }
            }
        }
        break;
    case WM_RBUTTONUP:
    case WM_LBUTTONUP:
        if( bar && bar->tool_list ) {
            tool = findToolAtPoint( bar, lparam );
            posted = FALSE;
            if( tool != NULL ) {
                if( tool == currTool ) {
                    PostMessage( bar->owner, WM_COMMAND, tool->id, 0 );
                    posted = TRUE;
                    drawButton( (HDC)NULL, hwnd, tool, FALSE );
                }
            }
            if( !posted && bar->hook != NULL ) {
                if( currTool != NULL ) {
                    bar->hook( hwnd, WM_USER, currTool->id, 1L );
                }
            }
            if( currTool != NULL ) {
                mouse_captured = FALSE;
                ignore_mousemove = TRUE; // release_capture generates a
                                         // WM_MOUSEMOVE
                ReleaseCapture();
                if( bar->helphook != NULL ) {
                    bar->helphook( hwnd, currTool->id, FALSE );
                }
                currTool = NULL;
            }
        }
        break;
    case WM_MOUSEMOVE:
        if( ignore_mousemove ) {
            ignore_mousemove = FALSE;
            break;
        }
        tool = findToolAtPoint( bar, lparam );
        if( currTool ) {
            if( tool == currTool ) {
                if( !currIsDown ) {
                    currIsDown = TRUE;
                    drawButton( (HDC)NULL, hwnd, currTool, TRUE );
                    if( bar->helphook != NULL ) {
                        bar->helphook( hwnd, currTool->id, TRUE );
                    }
                }
            } else {
                if( currIsDown ) {
                    drawButton( (HDC)NULL, hwnd, currTool, FALSE );
                    currIsDown = FALSE;
                    if( bar->helphook != NULL ) {
                        bar->helphook( hwnd, currTool->id, FALSE );
                    }
                }
            }
        } else {
            if( bar->helphook != NULL ) {
                if( tool ) {
                    bar->helphook( hwnd, tool->id, TRUE );
                    lastID = tool->id;
                } else if( lastID != (WORD)-1 ) {
                    bar->helphook( hwnd, lastID, FALSE );
                    lastID = -1;
                }
            }
        }
        break;
    case WM_PAINT:
        hdc = BeginPaint( hwnd, &ps );
        FillRect( hdc, &ps.rcPaint, btnFaceBrush );
        for( tool = bar->tool_list; tool != NULL; tool = tool->next ) {
            if( IntersectRect( &inter, &ps.rcPaint, &tool->area ) ) {
                drawButton( hdc, hwnd, tool, FALSE );
            }
        }
        EndPaint( hwnd, &ps );
        break;

    case WM_DESTROY:
        bar->hwnd = HNULL;
        break;
    }
    return( DefWindowProc( hwnd, msg, wparam, lparam ) );

} /* ToolBarWndPproc */

/*
 * ChangeToolButtonBitmap - change a bitmap for a toolbar item
 */
void ChangeToolButtonBitmap( toolbar *bar, int id, HBITMAP newbmp )
{
    tool        *t;
    t = findTool( bar->tool_list, id );
    if( t != NULL ) {
        t->bitmap = newbmp;
        InvalidateRect( bar->hwnd, &t->area, TRUE );
        UpdateWindow( bar->hwnd );
    }

} /* ChangeToolButtonBitmap */
