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fixed another return FALSE in a function returning a pointer (patch 545046)
[wxWidgets.git] / demos / forty / pile.h
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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
36const int NumCards = 2 * PackSize;
37
38
39//----------------------------------------------------------------//
40// A class defining a pile of cards with a position on the screen //
41//----------------------------------------------------------------//
42class Pile {
43public:
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
fc799548 72 void SetPos(int x,int y) {m_x = x;m_y = y;};
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73
74protected:
75 int m_x, m_y; // Position of the pile on the screen
76 int m_dx, m_dy; // Offset when drawing the pile
77 Card* m_cards[NumCards]; // Array of cards in this pile
78 int m_topCard; // Array index of the top card
79};
80
81#endif // _PILE_H_