demos/forty/pile.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        pile.h
   3 // Purpose:     Forty Thieves patience game
   4 // Author:      Chris Breeze
   5 // Modified by:
   6 // Created:     21/07/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1993-1998 Chris Breeze
   9 // Licence:     wxWindows licence
  10 //---------------------------------------------------------------------------
  11 // Last modified: 22nd July 1998 - ported to wxWindows 2.0
  12 /////////////////////////////////////////////////////////////////////////////
  13 //+-------------------------------------------------------------+
  14 //| Description:                                                                                                |
  15 //|     The base class for holding piles of playing cards.                      |
  16 //|     This is the basic building block for card games. A pile         |
  17 //|     has a position on the screen and an offset for each                     |
  18 //|     card placed on it e.g. a pack has no offset, but the            |
  19 //|     discard pile may be fanned out across the screen.                       |
  20 //|                                                                                                                             |
  21 //|     The pile knows how to draw itself, though this may be           |
  22 //|     overridden if the default layout needs to be changed.           |
  23 //|     One or more cards can be removed from the top of a pile,        |
  24 //|     and single cards can be added to the top of a pile.             |
  25 //|     Functions are provided which redraw the screen when                     |
  26 //|     cards are added or removed.                                                                     |
  27 //|                                                                                                                             |
  28 //|     Cards know which way up they are and how to draw                        |
  29 //|     themselves. Piles are lists of cards. Piles know which          |
  30 //|     cards they contain and where they are to be drawn.                      |
  31 //+-------------------------------------------------------------+
  32 #ifndef _PILE_H_
  33 #define _PILE_H_
  34 #include "card.h"
  35
  36 const int NumCards = 2 * PackSize;
  37
  38
  39 //----------------------------------------------------------------//
  40 // A class defining a pile of cards with a position on the screen //
  41 //----------------------------------------------------------------//
  42 class Pile {
  43 public:
  44         Pile(int x, int y, int dx = 0, int dy = 0);
  45         virtual ~Pile();
  46
  47         // General functions
  48         virtual void ResetPile() { m_topCard = -1; }
  49         virtual void Redraw(wxDC& pDC);
  50
  51         // Card query functions
  52         virtual Card* GetCard(int x, int y);    // Get pointer to card at x, y
  53         Card* GetTopCard();                     // Get pointer to top card
  54         virtual void GetCardPos(Card* card, int& x, int& y);
  55         // Get position of a card
  56         virtual void GetTopCardPos(int& x, int& y);
  57         // Get position of the top card
  58         int GetNumCards() { return m_topCard + 1; }     // Number of cards in pile
  59         bool Overlap(int x, int y);     // does card at x,y overlap the pile?
  60         int CalcDistance(int x, int y); // calculates the square of the distance
  61                                                                         // of a card at (x,y) from the top of the pile
  62
  63         // Functions removing one or more cards from the top of a pile
  64         virtual bool CanCardLeave(Card* card);
  65         Card* RemoveTopCard();
  66         virtual Card* RemoveTopCard(wxDC& pDC, int xOffset = 0, int yOffset = 0);
  67
  68         // Functions to add a card to the top of a pile
  69         virtual bool AcceptCard(Card*) { return FALSE; }
  70         virtual void AddCard(Card* card);       // Add card to top of pile
  71         virtual void AddCard(wxDC& pDC, Card* card);    // Add card + redraw it
  72
  73 protected:
  74         int   m_x, m_y;                         // Position of the pile on the screen
  75         int   m_dx, m_dy;                       // Offset when drawing the pile
  76         Card* m_cards[NumCards];        // Array of cards in this pile
  77         int   m_topCard;                                // Array index of the top card
  78 };
  79
  80 #endif // _PILE_H_