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wxPuzzle15.py
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wxPuzzle15.py
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#! /usr/bin/env python2.7
from __future__ import print_function
import wx
import puzzle15
import sys
class TilePanel(wx.Panel):
def __init__(self, label, bkgrd='Green', size=(70, 70), parent=None, ID=-1):
"""Initializes the tile panel."""
wx.Panel.__init__(self, parent, ID, wx.DefaultPosition, size, wx.RAISED_BORDER, label)
self.label = label
self.SetBackgroundColour(bkgrd)
self.SetMinSize(size)
self.Bind(wx.EVT_PAINT, self.OnPaint)
def OnPaint(self, event):
"""On Paint event handler."""
sz = self.GetClientSize()
dc = wx.PaintDC(self)
w, h = dc.GetTextExtent(self.label)
dc.SetFont(self.GetFont())
dc.DrawText(self.label, (sz.width - w) // 2, (sz.height - h) // 2)
class BoardFrame(wx.Frame):
def __init__(self, pzlType='Puzzle 15', pos=wx.DefaultPosition):
wx.Frame.__init__(self, None, -1, pzlType, pos)
# check puzzle type
if pzlType == 'Puzzle 15':
self.size = 4
elif pzlType == 'Puzzle 8':
self.size = 3
elif pzlType == 'Puzzle 3':
self.size = 2
else:
raise ValueError('Invalid puzzle')
# init properties
self.SHUFFLE_ID = 1
self.SOLVE_ID = 2
# init widget
self.InitMenu()
self.InitStatusbar()
self.InitToolbar()
self.InitBoard()
# event binding
self.Bind(wx.EVT_CHAR_HOOK, self.OnKeyDown)
def InitStatusbar(self):
"""Create and initialized the statusbar."""
self.statusbar = self.CreateStatusBar()
self.statusbar.SetFieldsCount(2)
def InitToolbar(self):
"""Create and initialized the statusbar."""
self.toolbar = self.CreateToolBar()
img = wx.Image('shuffle.png', wx.BITMAP_TYPE_ANY)
img = img.Scale(40, 40, wx.IMAGE_QUALITY_HIGH).ConvertToBitmap()
item = self.toolbar.AddSimpleTool(self.SHUFFLE_ID, img, 'Shuffle')
self.Bind(wx.EVT_MENU, self.OnShuffle, item)
img = wx.Image('solve.png', wx.BITMAP_TYPE_ANY)
img = img.Scale(40, 40, wx.IMAGE_QUALITY_HIGH).ConvertToBitmap()
item = self.toolbar.AddSimpleTool(self.SOLVE_ID, img, 'Solve')
self.Bind(wx.EVT_MENU, self.OnSolve, item)
self.toolbar.Realize()
def InitMenu(self):
"""Create and initializes the menu."""
menubar = wx.MenuBar()
self.filemenu = wx.Menu()
menuItem = self.filemenu.Append(self.SHUFFLE_ID, 'Shuffle')
self.Bind(wx.EVT_MENU, self.OnShuffle, menuItem)
menuItem = self.filemenu.Append(self.SOLVE_ID, 'Solve')
self.Bind(wx.EVT_MENU, self.OnSolve, menuItem)
self.filemenu.AppendSeparator()
menuItem = self.filemenu.Append(wx.NewId(), '&Quit')
self.Bind(wx.EVT_MENU, self.OnExit, menuItem)
menubar.Append(self.filemenu, '&File')
self.SetMenuBar(menubar)
def InitBoard(self):
"""Create and initializes the game's board."""
self.sizer = wx.GridSizer(rows=self.size, cols=self.size, hgap=5, vgap=5)
self.FillBoard()
self.SetSizerAndFit(self.sizer)
self.SetMinSize(self.GetClientSize())
self.SetMaxSize((500, 500))
def Swap(self, loc, layout=True):
"""Swap the cell in location with the empty cell."""
# detach the cell to swap and the empty cell
self.sizer.Detach(loc)
self.sizer.Detach(self.empty - 1 if loc < self.empty else self.empty)
# find the reference of the cell to swap
item = self.FindWindowByName(str(self.board[loc]))
# insert a new empty cell and move the cell to swap
if loc < self.empty:
self.sizer.InsertStretchSpacer(loc)
self.sizer.Insert(self.empty, item, flag=wx.EXPAND)
else:
self.sizer.Insert(self.empty, item, flag=wx.EXPAND)
self.sizer.InsertStretchSpacer(loc)
# update the board
self.board[self.empty], self.board[loc] = self.board[loc], self.board[self.empty]
self.moves += 1
# update tile color
if self.board[int(item.GetName()) - 1] == int(item.GetName()):
item.SetBackgroundColour('Green')
else:
item.SetBackgroundColour('Red')
# update the empty cell location and the layout
self.empty = loc
if layout:
self.sizer.Layout()
self.UpdateStatusBar()
def UpdateStatusBar(self):
self.statusbar.SetStatusText('Moves: {}'.format(self.moves), 0)
# compute the number of misplaced tiles
left = len([v for i, v in enumerate(self.board) if v != i+1 and v != len(self.board)])
self.statusbar.SetStatusText('Tiles left: {}'.format(left), 1)
def ClearBoard(self):
"""Remove all the tiles."""
self.sizer.Clear()
for child in self.GetChildren():
if isinstance(child, TilePanel):
child.Destroy()
def FillBoard(self):
"""Fill the board with a random and solvable configuration."""
# add properties
self.board = puzzle15.spuzzle(self.size)
self.empty = self.board.index(len(self.board))
self.moves = 0
# add tiles
for i, v in enumerate(self.board):
if v == len(self.board):
self.sizer.AddStretchSpacer()
else:
background = 'Green' if v == i+1 else 'Red'
tile = TilePanel(parent=self, label=str(v), bkgrd=background)
self.sizer.Add(tile, flag=wx.EXPAND)
self.sizer.Layout()
self.UpdateStatusBar()
def Active(self, enable=True):
"""Enable toolbar items."""
self.toolbar.EnableTool(self.SHUFFLE_ID, enable)
self.toolbar.EnableTool(self.SOLVE_ID, enable)
self.filemenu.FindItemById(self.SHUFFLE_ID).Enable(enable)
self.filemenu.FindItemById(self.SOLVE_ID).Enable(enable)
def OnKeyDown(self, event):
"""Key down event handler."""
# get the key code
keycode = event.GetKeyCode()
# check which arrow has been pressed and swap cells
if keycode == wx.WXK_LEFT and (self.empty % self.size) + 1 < self.size:
self.Swap(self.empty + 1)
elif keycode == wx.WXK_RIGHT and (self.empty % self.size) - 1 >= 0:
self.Swap(self.empty - 1)
elif keycode == wx.WXK_UP and (self.empty + self.size) < len(self.board):
self.Swap(self.empty + self.size)
elif keycode == wx.WXK_DOWN and (self.empty - self.size) >= 0:
self.Swap(self.empty - self.size)
else:
event.Skip()
def OnShuffle(self, event):
"""Shuffle the board."""
self.ClearBoard()
self.FillBoard()
# set the focus (to any tile) in order to use arrow keys
item = self.FindWindowByName('1')
item.SetFocus()
def OnSolve(self, event):
"""Solve the puzzle."""
# get the first solution
steps = puzzle15.solve(self.board, lowerBound=-1)
# check if the puzzle can be solved
if steps:
time = 10
elapsed = time + 250 * len(steps)
# disable toolbar and menu while solving
self.Active(enable=False)
# simulate animation
for loc in [x for x, y in steps]:
wx.CallLater(time, self.Swap, loc)
time += 250
# enable toolbar/menu items after simulation
wx.CallLater(elapsed, self.Active)
def OnExit(self, event):
"""Close the frame."""
self.Destroy()
class PuzzleApp(wx.App):
def __init__(self, pzlType='Puzzle 15'):
"""Initializes the application."""
self.pzlType = pzlType
wx.App.__init__(self)
def OnInit(self):
self.frame = BoardFrame(pzlType=self.pzlType)
self.frame.Show()
self.SetTopWindow(self.frame)
return True
if __name__ == '__main__':
if len(sys.argv) == 2:
app = PuzzleApp(pzlType='Puzzle ' + sys.argv[1])
else:
app = PuzzleApp()
app.MainLoop()