grid.c

来自「开放源码的编译器open watcom 1.6.0版的源代码」· C语言 代码 · 共 171 行

/****************************************************************************
*
*                            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!
*
****************************************************************************/


/* GRID.C - routines to support creation of object on a specified grid */

#include <windows.h>
#include "global.h"
#include "fmedit.def"
#include "state.def"
#include "fmdlgs.h"

extern BOOL SnapRectToGrid( RECT * rec )
/**************************************/

/*  Make sure the passed rectangle aligns with the user-specified
 *  resize grid.
 */

  {
    int     inc;
    int     rnd;
    int     size;
    BOOL    changed;
    int     new;

    changed = FALSE;
    inc = GetResizeVInc();
    rnd = inc-1;
    size = rec->bottom - rec->top - 1;    /* exclude borders */
    new = ((size + rnd) / inc) * inc;
    if( new != size ) {
        changed = TRUE;
        rec->bottom = rec->top + new;
    }
    inc = GetResizeHInc();
    rnd = inc-1;
    size = rec->right - rec->left - 1;
    new = ((size + rnd) / inc) * inc;
    if( new != size ) {
        changed = TRUE;
        rec->right = rec->left + new;
    }
    return( changed );
  }


static void DoPointSnap( POINT * pt, unsigned vinc, unsigned hinc )
/*****************************************************************/

  {
    pt->y = ((pt->y + (vinc>>1)) / vinc) * vinc;
    pt->x = ((pt->x + (hinc>>1)) / hinc ) * hinc;
  }


extern void SnapPointToGrid( POINT * pt )
/***************************************/

/* snap the given point to the current grid */

  {
    DoPointSnap( pt, GetVerticalInc(), GetHorizontalInc() );
  }

extern void SnapPointToResizeGrid( POINT * pt )
/*********************************************/

/* snap the given point to the current grid */

  {
    DoPointSnap( pt, GetResizeVInc(), GetResizeHInc() );
  }


BOOL WINIEXP FMGrid( HWND hdlg, unsigned message,
                                  WPARAM wParam, LPARAM lParam )
/************************************************************/

/* Processes messages for "Grid" dialog box */

  {
    RECT        rect;
    HANDLE      appwnd;
    unsigned    inc;
    BOOL        ret;

    lParam = lParam;                 /* reference to avoid warning */
    switch( message ) {
    case WM_INITDIALOG :
        InheritState( hdlg );
        SetDlgItemInt( hdlg, ID_VPREC, GetVerticalInc(), FALSE );
        SetDlgItemInt( hdlg, ID_HPREC, GetHorizontalInc(), FALSE );
        return( TRUE );
        break;
    case WM_COMMAND :
        InitState( hdlg );
        switch( LOWORD(wParam) ) {
        case IDOK :
            inc = GetDlgItemInt( hdlg, ID_VPREC, &ret, FALSE );
            if( ret && inc >= 1 && inc <= 100 ) {
                SetVerticalInc( inc );
            } else {
                MessageBox( hdlg,
                    "The vertical precision must be an integer "
                                "between 1 and 100",
                    NULL,
                    MB_ICONEXCLAMATION | MB_OK );
                SetFocus( GetDlgItem( hdlg, ID_VPREC ) );
                return( TRUE );
            }
            inc = GetDlgItemInt( hdlg, ID_HPREC, &ret, FALSE );
            if( ret && inc >= 1 && inc <= 100 ) {
                SetHorizontalInc( inc );
            } else {
                MessageBox( hdlg,
                    "The horizontal precision must be an integer "
                                "between 1 and 100",
                    NULL,
                    MB_ICONEXCLAMATION | MB_OK );
                SetFocus( GetDlgItem( hdlg, ID_HPREC ) );
                return( TRUE );
            }
            EndDialog( hdlg, TRUE );
            return( TRUE );
            break;
        case IDCANCEL :
            EndDialog( hdlg, FALSE );
            return( TRUE );
            break;
        }
        break;
    case WM_MOVE :
        InitState( hdlg );
        appwnd = GetAppWnd();
        GetWindowRect( hdlg, ( LPRECT ) &rect );
        InvalidateRect( appwnd, ( LPRECT ) &rect, TRUE );
        UpdateWindow( appwnd );
        break;
    }
    return( FALSE );
  }