samples/forty/pile.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        pile.cpp
   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 //+-------------------------------------------------------------+
  17
  18 #ifdef __GNUG__
  19 #pragma implementation
  20 #pragma interface
  21 #endif
  22
  23 // For compilers that support precompilation, includes "wx/wx.h".
  24 #include "wx/wxprec.h"
  25
  26 #ifdef __BORLANDC__
  27 #pragma hdrstop
  28 #endif
  29
  30 #ifndef WX_PRECOMP
  31 #include "wx/wx.h"
  32 #endif
  33 #ifdef __GNUG__
  34 #pragma implementation
  35 #endif
  36
  37 #include <stdlib.h>
  38 #include <stdio.h>
  39 #include <time.h>
  40 #include <string.h>
  41 #include "card.h"
  42 #include "pile.h"
  43
  44 #include "wx/app.h"
  45
  46 //+-------------------------------------------------------------+
  47 //| Pile::Pile()                                                                                                |
  48 //+-------------------------------------------------------------+
  49 //| Description:                                                                                                |
  50 //|     Initialise the pile to be empty of cards.                                       |
  51 //+-------------------------------------------------------------+
  52 Pile::Pile(int x, int y, int dx, int dy)
  53 {
  54     m_x = x;
  55     m_y = y;
  56     m_dx = dx;
  57     m_dy = dy;
  58     for (m_topCard = 0; m_topCard < NumCards; m_topCard++)
  59     {
  60         m_cards[m_topCard] = 0;
  61     }
  62     m_topCard = -1;     // i.e. empty
  63 }
  64
  65
  66 //+-------------------------------------------------------------+
  67 //| Pile::Redraw()                                                                                              |
  68 //+-------------------------------------------------------------+
  69 //| Description:                                                                                                |
  70 //|     Redraw the pile on the screen. If the pile is empty                     |
  71 //|     just draw a NULL card as a place holder for the pile.           |
  72 //|     Otherwise draw the pile from the bottom up, starting            |
  73 //|     at the origin of the pile, shifting each subsequent                     |
  74 //|     card by the pile's x and y offsets.                                                     |
  75 //+-------------------------------------------------------------+
  76 void Pile::Redraw(wxDC& dc )
  77 {
  78    wxWindow *frame = wxTheApp->GetTopWindow();
  79    wxWindow *canvas = (wxWindow *) NULL;
  80    if (frame)
  81    {
  82      wxNode *node = frame->GetChildren()->First();
  83      if (node) canvas = (wxWindow*)node->Data();
  84    }
  85
  86         if (m_topCard >= 0)
  87         {
  88                 if (m_dx == 0 && m_dy == 0)
  89                 {
  90                         if ((canvas) && (canvas->IsExposed(m_x,m_y,60,200)))
  91                           m_cards[m_topCard]->Draw(dc, m_x, m_y);
  92                 }
  93                 else
  94                 {
  95                         int x = m_x;
  96                         int y = m_y;
  97                         for (int i = 0; i <= m_topCard; i++)
  98                         {
  99                               if ((canvas) && (canvas->IsExposed(x,y,60,200)))
 100                                 m_cards[i]->Draw(dc, x, y);
 101                               x += m_dx;
 102                               y += m_dy;
 103                         }
 104                 }
 105         }
 106         else
 107         {
 108             if ((canvas) && (canvas->IsExposed(m_x,m_y,60,200)))
 109                 Card::DrawNullCard(dc, m_x, m_y);
 110         }
 111 }
 112
 113
 114 //+-------------------------------------------------------------+
 115 //| Pile::GetTopCard()                                          |
 116 //+-------------------------------------------------------------+
 117 //| Description:                                                                                                |
 118 //|     Return a pointer to the top card in the pile or NULL            |
 119 //|     if the pile is empty.                                                                           |
 120 //| NB: Gets a copy of the card without removing it from the    |
 121 //|     pile.                                                                                                           |
 122 //+-------------------------------------------------------------+
 123 Card* Pile::GetTopCard()
 124 {
 125     Card* card = 0;
 126
 127     if (m_topCard >= 0)
 128     {
 129         card = m_cards[m_topCard];
 130     }
 131     return card;
 132 }
 133
 134
 135 //+-------------------------------------------------------------+
 136 //| Pile::RemoveTopCard()                                       |
 137 //+-------------------------------------------------------------+
 138 //| Description:                                                                                                |
 139 //|     If the pile is not empty, remove the top card from the          |
 140 //|     pile and return the pointer to the removed card.                        |
 141 //|     If the pile is empty return a NULL pointer.                                     |
 142 //+-------------------------------------------------------------+
 143 Card* Pile::RemoveTopCard()
 144 {
 145     Card* card = 0;
 146
 147     if (m_topCard >= 0)
 148     {
 149                 card = m_cards[m_topCard--];
 150     }
 151     return card;
 152 }
 153
 154
 155 //+-------------------------------------------------------------+
 156 //| Pile::RemoveTopCard()                                       |
 157 //+-------------------------------------------------------------+
 158 //| Description:                                                                                                |
 159 //|     As RemoveTopCard() but also redraw the top of the pile          |
 160 //|     after the card has been removed.                                                        |
 161 //| NB: the offset allows for the redrawn area to be in a               |
 162 //|     bitmap ready for 'dragging' cards acrosss the screen.           |
 163 //+-------------------------------------------------------------+
 164 Card* Pile::RemoveTopCard(wxDC& dc, int xOffset, int yOffset)
 165 {
 166         int topX, topY, x, y;
 167
 168         GetTopCardPos(topX, topY);
 169         Card* card = RemoveTopCard();
 170
 171         if (card)
 172         {
 173                 card->Erase(dc, topX - xOffset, topY - yOffset);
 174                 GetTopCardPos(x, y);
 175                 if (m_topCard < 0)
 176                 {
 177                         Card::DrawNullCard(dc, x - xOffset, y - yOffset);
 178                 }
 179                 else
 180                 {
 181                         m_cards[m_topCard]->Draw(dc, x - xOffset, y - yOffset);
 182                 }
 183         }
 184
 185         return card;
 186 }
 187
 188
 189 void Pile::GetTopCardPos(int& x, int& y)
 190 {
 191         if (m_topCard < 0)
 192         {
 193                 x = m_x;
 194                 y = m_y;
 195         }
 196         else
 197         {
 198                 x = m_x + m_dx * m_topCard;
 199                 y = m_y + m_dy * m_topCard;
 200         }
 201 }
 202
 203 void Pile::AddCard(Card* card)
 204 {
 205     if (m_topCard < -1) m_topCard = -1;
 206
 207     m_cards[++m_topCard] = card;
 208 }
 209
 210 void Pile::AddCard(wxDC& dc, Card* card)
 211 {
 212     AddCard(card);
 213     int x, y;
 214     GetTopCardPos(x, y);
 215     card->Draw(dc, x, y);
 216 }
 217
 218 // Can the card leave this pile.
 219 // If it is a member of the pile then the answer is yes.
 220 // Derived classes may override this behaviour to incorporate
 221 // the rules of the game
 222 bool Pile::CanCardLeave(Card* card)
 223 {
 224     for (int i = 0; i <= m_topCard; i++)
 225     {
 226         if (card == m_cards[i]) return TRUE;
 227     }
 228     return FALSE;
 229 }
 230
 231 // Calculate how far x, y is from top card in the pile
 232 // Returns the square of the distance
 233 int Pile::CalcDistance(int x, int y)
 234 {
 235     int cx, cy;
 236     GetTopCardPos(cx, cy);
 237     return ((cx - x) * (cx - x) + (cy - y) * (cy - y));
 238 }
 239
 240
 241 // Return the card at x, y. Check the top card first, then
 242 // work down the pile. If a card is found then return a pointer
 243 // to the card, otherwise return NULL
 244 Card* Pile::GetCard(int x, int y)
 245 {
 246         int cardX;
 247         int cardY;
 248         GetTopCardPos(cardX, cardY);
 249
 250         for (int i = m_topCard; i >= 0; i--)
 251         {
 252                 if (x >= cardX && x <= cardX + CardWidth &&
 253                         y >= cardY && y <= cardY + CardHeight)
 254                 {
 255                         return m_cards[i];
 256                 }
 257                 cardX -= m_dx;
 258                 cardY -= m_dy;
 259         }
 260         return 0;
 261 }
 262
 263
 264 // Return the position of the given card. If it is not a member of this pile
 265 // return the origin of the pile.
 266 void Pile::GetCardPos(Card* card, int& x, int& y)
 267 {
 268         x = m_x;
 269         y = m_y;
 270
 271         for (int i = 0; i <= m_topCard; i++)
 272         {
 273                 if (card == m_cards[i])
 274                 {
 275                         return;
 276                 }
 277                 x += m_dx;
 278                 y += m_dy;
 279         }
 280
 281         // card not found in pile, return origin of pile
 282         x = m_x;
 283         y = m_y;
 284 }
 285
 286
 287 bool Pile::Overlap(int x, int y)
 288 {
 289     int cardX;
 290     int cardY;
 291     GetTopCardPos(cardX, cardY);
 292
 293     if (x >= cardX - CardWidth  && x <= cardX + CardWidth &&
 294         y >= cardY - CardHeight && y <= cardY + CardHeight)
 295     {
 296             return TRUE;
 297     }
 298     return FALSE;
 299 }
 300
 301
 302 Pile::~Pile()
 303 {
 304 // nothing special at the moment
 305 }