The idea is painting to a bitmap and then copy it to the DC on the OnPaint event. This solution improved a lot the way application was shown it didn't removed he flicks completely.
After some research I found the solution by capturing the EVT_ERASE_BACKGROUND event and do nothing with it. This fixed all the issues. It also important to call the Update method after the Refresh.
The new board.py code is:
#!/usr/bin/python
import wx
import stateDB
import rectangle
class Board(wx.Panel):
boardId = 77
def __init__ (self, parent, pieces, count, seconds, allowRotation=True):
wx.Panel.__init__(self, parent, style = wx.NO_FULL_REPAINT_ON_RESIZE)
self.db = stateDB.StateDB()
self.pieces = pieces
self.dragged = None
self.count = count
self.completed = False
self.seconds = seconds
self.timer = wx.Timer (self, wx.ID_ANY)
self.Bind (wx.EVT_TIMER, self.OnTimer, self.timer)
self.timer.Start (1000, False)
self.printStatus ()
self.Bind (wx.EVT_PAINT, self.OnPaint)
self.Bind (wx.EVT_ERASE_BACKGROUND, self.OnEraseBackground)
self.Bind (wx.EVT_SIZE, self.OnSize)
self.Bind (wx.EVT_LEFT_DOWN, self.OnDown)
self.Bind (wx.EVT_LEFT_UP, self.OnUp)
self.Bind (wx.EVT_MOTION, self.OnMouseMotion)
if allowRotation:
self.Bind (wx.EVT_RIGHT_UP, self.OnRight)
def SaveStatus(self):
self.db.initiateDB ()
self.db.saveEverything (Board.boardId, self.count, self.seconds, \
self.pieces)
def printStatus (self):
mins = self.seconds%(60*60)/60
minStr = str(mins)
if (mins < 10):
minStr = '0' + minStr
secs = self.seconds%60
secStr = str(secs)
if (secs < 10):
secStr = '0' + secStr
timeStr = str(self.seconds/(60*60)) + ':' + minStr + ':' + secStr
if self.completed:
status = 'Completed: ' + timeStr
else:
status = str(self.count) + ': ' + timeStr
self.GetParent().statusbar.SetStatusText (status)
def OnTimer (self, e):
if not self.completed:
self.seconds += 1
self.printStatus ()
def OnEraseBackground (self, e):
""" To avoid flickering in windows"""
pass
def OnPaint (self, e):
dc = wx.BufferedPaintDC(self, self._Buffer, wx.BUFFER_VIRTUAL_AREA)
def draw (self, dc):
dc.Clear ()
for p in self.pieces:
p.drawPiece (dc)
def UpdateDrawing (self):
dc = wx.MemoryDC ()
dc.SelectObject (self._Buffer)
self.draw (dc)
del dc
self.Refresh ()
self.Update ()
def OnSize (self, e):
s = self.ClientSize
self._Buffer = wx.EmptyBitmap (*s)
self.UpdateDrawing ()
def OnDown (self, e):
mousePos = e.GetPosition()
# The iteration is reversed so the piece on top is choosen
indexes = range(len(self.pieces))
indexes.reverse()
for i in indexes:
if self.pieces[i].checkPointInPiece (mousePos):
# Put the selected at the end of the list so it's painted the last
p = self.pieces[i]
self.pieces.append(p)
del self.pieces[i]
self.dragged = len(self.pieces) -1
break
def OnUp (self, e):
if self.dragged != None:
mousePos = e.GetPosition()
for i in range(len(self.pieces)):
if (self.dragged != i):
if self.pieces[self.dragged].checkPieceMatch (\
self.pieces[i]):
del self.pieces[i]
#self.Refresh()
self.UpdateDrawing ()
self.count += 1
self.printStatus ()
self.SaveStatus ()
if len(self.pieces) == 1:
if (self.pieces[0].getOrientation() ==\
rectangle.Orientation.or0):
self.db.RemoveDBFile ()
self.completed = True
self.printStatus ()
break
self.dragged = None
def OnMouseMotion (self, e):
if self.dragged != None:
mousePos = e.GetPosition()
self.pieces[self.dragged].movePiece (mousePos)
#self.Refresh()
self.UpdateDrawing ()
def OnRight (self, e):
mousePos = e.GetPosition()
indexes = range(len(self.pieces))
indexes.reverse()
for i in indexes:
if self.pieces[i].checkPointInPiece (mousePos):
self.pieces[i].incrementOrientation()
newPos = self.pieces[i].calculateCenterPosition()
self.pieces[i].changeRelPosition (newPos)
self.pieces[i].checkPointInPiece (mousePos)
#self.Refresh()
self.UpdateDrawing ()
if len(self.pieces) == 1:
if (self.pieces[0].getOrientation() == \
rectangle.Orientation.or0):
self.completed = True
self.printStatus ()
break
class Puzzle (wx.Frame):
def __init__ (self, parent, id, title, pieces, boardSize, count,
seconds, allowRotation=True):
wx.Frame.__init__(self, parent, id, title, size=boardSize)
self.statusbar = self.CreateStatusBar()
self.board = Board(self, pieces, count, seconds, allowRotation)
self.Centre()
self.Show(True)
