RECTWrapper.h

   1 /*
   2  * Copyright (c) 2001,2002, Gary R. Van Sickle.
   3  *
   4  *     This program is free software; you can redistribute it and/or modify
   5  *     it under the terms of the GNU General Public License as published by
   6  *     the Free Software Foundation; either version 2 of the License, or
   7  *     (at your option) any later version.
   8  *
   9  *     A copy of the GNU General Public License can be found at
  10  *     http://www.gnu.org/
  11  *
  12  * Written by Gary R. Van Sickle <g.r.vansickle@worldnet.att.net>
  13  *
  14  */
  15
  16 #ifndef SETUP_RECTWRAPPER_H
  17 #define SETUP_RECTWRAPPER_H
  18
  19
  20 #include "win32.h"
  21
  22 /*
  23 Thin wrapper around GDI's RECT, mainly to allow what would otherwise have to
  24 be a ton of "OffsetRect(&rect, 1, 2);"-type calls to be more easily written.
  25 Also has a few gimmes like width() and height().  Note this is derived from
  26 GDI's RECT *struct*, so that they're interchangable, and is not a class proper.
  27 Not a general-purpose Rectangle class, not intended to be a general-purpose
  28 Rectangle class.
  29 DO NOT add virtual members or you'll wreck the RECT==RECTWrapper duality.
  30 */
  31
  32 struct RECTWrapper : public RECT
  33 {
  34   // Get interesting facts about the RECT/RECTWrapper
  35   int width() const { return right - left; };
  36   int height() const { return bottom - top; };
  37   POINT center() const;
  38
  39   // Do interesting things to the RECT/RECTWrapper
  40   RECTWrapper& operator=(const RECT & r);
  41   void move(int x, int y);
  42 };
  43
  44 inline RECTWrapper& RECTWrapper::operator=(const RECT & r)
  45 {
  46   right = r.right;
  47   left = r.left;
  48   top = r.top;
  49   bottom = r.bottom;
  50   return *this;
  51 };
  52
  53 inline POINT RECTWrapper::center() const
  54 {
  55   // Return the center point of the rect.
  56   POINT retval;
  57   retval.x = (left + right)/2;
  58   retval.y = (top + bottom)/2;
  59   return retval;
  60 }
  61
  62 inline void RECTWrapper::move(int x, int y)
  63 {
  64   // Move the whole rect by [x,y].
  65   // Windows refers to this as offsetting.
  66   OffsetRect(this, x, y);
  67 };
  68
  69 #endif /* SETUP_RECTWRAPPER_H */