Welcome folks today in this blog post we will be building a tetris game in python using wxpython library. All the full source code of the application is shown below.
Get Started
In order to get started you need to install the following library using the pip command as shown below
pip install wxpython
After installing this library make an app.py file and copy paste the following code
app.py
#!/usr/bin/env python
"""
ZetCode wxPython tutorial
This is Tetris game clone in wxPython.
author: Jan Bodnar
website: www.zetcode.com
last modified: July 2020
"""
import wx
import random
class Tetris(wx.Frame):
def __init__(self, parent):
wx.Frame.__init__(self, parent, size=(180, 380),
style=wx.DEFAULT_FRAME_STYLE ^ wx.RESIZE_BORDER ^ wx.MAXIMIZE_BOX)
self.initFrame()
def initFrame(self):
self.statusbar = self.CreateStatusBar()
self.statusbar.SetStatusText('0')
self.board = Board(self)
self.board.SetFocus()
self.board.start()
self.SetTitle("Tetris")
self.Centre()
class Board(wx.Panel):
BoardWidth = 10
BoardHeight = 22
Speed = 300
ID_TIMER = 1
def __init__(self, *args, **kw):
super(Board, self).__init__(*args, **kw)
self.initBoard()
def initBoard(self):
self.timer = wx.Timer(self, Board.ID_TIMER)
self.isWaitingAfterLine = False
self.curPiece = Shape()
self.nextPiece = Shape()
self.curX = 0
self.curY = 0
self.numLinesRemoved = 0
self.board = []
self.isStarted = False
self.isPaused = False
self.Bind(wx.EVT_PAINT, self.OnPaint)
self.Bind(wx.EVT_KEY_DOWN, self.OnKeyDown)
self.Bind(wx.EVT_TIMER, self.OnTimer, id=Board.ID_TIMER)
self.clearBoard()
def shapeAt(self, x, y):
return self.board[(y * Board.BoardWidth) + x]
def setShapeAt(self, x, y, shape):
self.board[(y * Board.BoardWidth) + x] = shape
def squareWidth(self):
return self.GetClientSize().GetWidth() // Board.BoardWidth
def squareHeight(self):
return self.GetClientSize().GetHeight() // Board.BoardHeight
def start(self):
if self.isPaused:
return
self.isStarted = True
self.isWaitingAfterLine = False
self.numLinesRemoved = 0
self.clearBoard()
self.newPiece()
self.timer.Start(Board.Speed)
def pause(self):
if not self.isStarted:
return
self.isPaused = not self.isPaused
statusbar = self.GetParent().statusbar
if self.isPaused:
self.timer.Stop()
statusbar.SetStatusText('paused')
else:
self.timer.Start(Board.Speed)
statusbar.SetStatusText(str(self.numLinesRemoved))
self.Refresh()
def clearBoard(self):
for i in range(Board.BoardHeight * Board.BoardWidth):
self.board.append(Tetrominoes.NoShape)
def OnPaint(self, event):
dc = wx.PaintDC(self)
size = self.GetClientSize()
boardTop = size.GetHeight() - Board.BoardHeight * self.squareHeight()
for i in range(Board.BoardHeight):
for j in range(Board.BoardWidth):
shape = self.shapeAt(j, Board.BoardHeight - i - 1)
if shape != Tetrominoes.NoShape:
self.drawSquare(dc,
0 + j * self.squareWidth(),
boardTop + i * self.squareHeight(), shape)
if self.curPiece.shape() != Tetrominoes.NoShape:
for i in range(4):
x = self.curX + self.curPiece.x(i)
y = self.curY - self.curPiece.y(i)
self.drawSquare(dc, 0 + x * self.squareWidth(),
boardTop + (Board.BoardHeight - y - 1) * self.squareHeight(),
self.curPiece.shape())
def OnKeyDown(self, event):
if not self.isStarted or self.curPiece.shape() == Tetrominoes.NoShape:
event.Skip()
return
keycode = event.GetKeyCode()
if keycode == ord('P') or keycode == ord('p'):
self.pause()
return
if self.isPaused:
return
elif keycode == wx.WXK_LEFT:
self.tryMove(self.curPiece, self.curX - 1, self.curY)
elif keycode == wx.WXK_RIGHT:
self.tryMove(self.curPiece, self.curX + 1, self.curY)
elif keycode == wx.WXK_DOWN:
self.tryMove(self.curPiece.rotatedRight(), self.curX, self.curY)
elif keycode == wx.WXK_UP:
self.tryMove(self.curPiece.rotatedLeft(), self.curX, self.curY)
elif keycode == wx.WXK_SPACE:
self.dropDown()
elif keycode == ord('D') or keycode == ord('d'):
self.oneLineDown()
else:
event.Skip()
def OnTimer(self, event):
if event.GetId() == Board.ID_TIMER:
if self.isWaitingAfterLine:
self.isWaitingAfterLine = False
self.newPiece()
else:
self.oneLineDown()
else:
event.Skip()
def dropDown(self):
newY = self.curY
while newY > 0:
if not self.tryMove(self.curPiece, self.curX, newY - 1):
break
newY -= 1
self.pieceDropped()
def oneLineDown(self):
if not self.tryMove(self.curPiece, self.curX, self.curY - 1):
self.pieceDropped()
def pieceDropped(self):
for i in range(4):
x = self.curX + self.curPiece.x(i)
y = self.curY - self.curPiece.y(i)
self.setShapeAt(x, y, self.curPiece.shape())
self.removeFullLines()
if not self.isWaitingAfterLine:
self.newPiece()
def removeFullLines(self):
numFullLines = 0
statusbar = self.GetParent().statusbar
rowsToRemove = []
for i in range(Board.BoardHeight):
n = 0
for j in range(Board.BoardWidth):
if not self.shapeAt(j, i) == Tetrominoes.NoShape:
n = n + 1
if n == 10:
rowsToRemove.append(i)
rowsToRemove.reverse()
for m in rowsToRemove:
for k in range(m, Board.BoardHeight):
for l in range(Board.BoardWidth):
self.setShapeAt(l, k, self.shapeAt(l, k + 1))
numFullLines = numFullLines + len(rowsToRemove)
if numFullLines > 0:
self.numLinesRemoved = self.numLinesRemoved + numFullLines
statusbar.SetStatusText(str(self.numLinesRemoved))
self.isWaitingAfterLine = True
self.curPiece.setShape(Tetrominoes.NoShape)
self.Refresh()
def newPiece(self):
self.curPiece = self.nextPiece
statusbar = self.GetParent().statusbar
self.nextPiece.setRandomShape()
self.curX = Board.BoardWidth // 2 + 1
self.curY = Board.BoardHeight - 1 + self.curPiece.minY()
if not self.tryMove(self.curPiece, self.curX, self.curY):
self.curPiece.setShape(Tetrominoes.NoShape)
self.timer.Stop()
self.isStarted = False
statusbar.SetStatusText('Game over')
def tryMove(self, newPiece, newX, newY):
for i in range(4):
x = newX + newPiece.x(i)
y = newY - newPiece.y(i)
if x < 0 or x >= Board.BoardWidth or y < 0 or y >= Board.BoardHeight:
return False
if self.shapeAt(x, y) != Tetrominoes.NoShape:
return False
self.curPiece = newPiece
self.curX = newX
self.curY = newY
self.Refresh()
return True
def drawSquare(self, dc, x, y, shape):
colors = ['#000000', '#CC6666', '#66CC66', '#6666CC',
'#CCCC66', '#CC66CC', '#66CCCC', '#DAAA00']
light = ['#000000', '#F89FAB', '#79FC79', '#7979FC',
'#FCFC79', '#FC79FC', '#79FCFC', '#FCC600']
dark = ['#000000', '#803C3B', '#3B803B', '#3B3B80',
'#80803B', '#803B80', '#3B8080', '#806200']
pen = wx.Pen(light[shape])
pen.SetCap(wx.CAP_PROJECTING)
dc.SetPen(pen)
dc.DrawLine(x, y + self.squareHeight() - 1, x, y)
dc.DrawLine(x, y, x + self.squareWidth() - 1, y)
darkpen = wx.Pen(dark[shape])
darkpen.SetCap(wx.CAP_PROJECTING)
dc.SetPen(darkpen)
dc.DrawLine(x + 1, y + self.squareHeight() - 1,
x + self.squareWidth() - 1, y + self.squareHeight() - 1)
dc.DrawLine(x + self.squareWidth() - 1,
y + self.squareHeight() - 1, x + self.squareWidth() - 1, y + 1)
dc.SetPen(wx.TRANSPARENT_PEN)
dc.SetBrush(wx.Brush(colors[shape]))
dc.DrawRectangle(x + 1, y + 1, self.squareWidth() - 2,
self.squareHeight() - 2)
class Tetrominoes(object):
NoShape = 0
ZShape = 1
SShape = 2
LineShape = 3
TShape = 4
SquareShape = 5
LShape = 6
MirroredLShape = 7
class Shape(object):
coordsTable = (
((0, 0), (0, 0), (0, 0), (0, 0)),
((0, -1), (0, 0), (-1, 0), (-1, 1)),
((0, -1), (0, 0), (1, 0), (1, 1)),
((0, -1), (0, 0), (0, 1), (0, 2)),
((-1, 0), (0, 0), (1, 0), (0, 1)),
((0, 0), (1, 0), (0, 1), (1, 1)),
((-1, -1), (0, -1), (0, 0), (0, 1)),
((1, -1), (0, -1), (0, 0), (0, 1))
)
def __init__(self):
self.coords = [[0,0] for i in range(4)]
self.pieceShape = Tetrominoes.NoShape
self.setShape(Tetrominoes.NoShape)
def shape(self):
return self.pieceShape
def setShape(self, shape):
table = Shape.coordsTable[shape]
for i in range(4):
for j in range(2):
self.coords[i][j] = table[i][j]
self.pieceShape = shape
def setRandomShape(self):
self.setShape(random.randint(1, 7))
def x(self, index):
return self.coords[index][0]
def y(self, index):
return self.coords[index][1]
def setX(self, index, x):
self.coords[index][0] = x
def setY(self, index, y):
self.coords[index][1] = y
def minX(self):
m = self.coords[0][0]
for i in range(4):
m = min(m, self.coords[i][0])
return m
def maxX(self):
m = self.coords[0][0]
for i in range(4):
m = max(m, self.coords[i][0])
return m
def minY(self):
m = self.coords[0][1]
for i in range(4):
m = min(m, self.coords[i][1])
return m
def maxY(self):
m = self.coords[0][1]
for i in range(4):
m = max(m, self.coords[i][1])
return m
def rotatedLeft(self):
if self.pieceShape == Tetrominoes.SquareShape:
return self
result = Shape()
result.pieceShape = self.pieceShape
for i in range(4):
result.setX(i, self.y(i))
result.setY(i, -self.x(i))
return result
def rotatedRight(self):
if self.pieceShape == Tetrominoes.SquareShape:
return self
result = Shape()
result.pieceShape = self.pieceShape
for i in range(4):
result.setX(i, -self.y(i))
result.setY(i, self.x(i))
return result
def main():
app = wx.App()
ex = Tetris(None)
ex.Show()
app.MainLoop()
if __name__ == '__main__':
main()
Now if you execute the python script by typing the below command as shown below
python app.py
