# -*- coding: utf-8 -*-
import wx
import wx.lib.buttons
import cPickle
import os
class PaintWindow(wx.Window):
def __init__(self, parent, id):
wx.Window.__init__(self, parent, id)
self.SetBackgroundColour("Red")
self.color = "Green"
self.thickness = 10
self.pen = wx.Pen(self.color, self.thickness, wx.SOLID)
self.lines = []
self.curLine = []
self.pos = (0, 0)
self.InitBuffer()
self.Bind(wx.EVT_LEFT_DOWN, self.OnLeftDown)
self.Bind(wx.EVT_LEFT_UP, self.OnLeftUp)
self.Bind(wx.EVT_MOTION, self.OnMotion)
self.Bind(wx.EVT_SIZE, self.OnSize)
self.Bind(wx.EVT_IDLE, self.OnIdle)
self.Bind(wx.EVT_PAINT, self.OnPaint)
def InitBuffer(self):
size = self.GetClientSize()
self.buffer = wx.EmptyBitmap(size.width, size.height)
dc = wx.BufferedDC(None, self.buffer)
dc.SetBackground(wx.Brush(self.GetBackgroundColour()))
dc.Clear()
self.DrawLines(dc)
self.reInitBuffer = False
def GetLinesData(self):
return self.lines[:]
def SetLinesData(self, lines):
self.lines = lines[:]
self.InitBuffer()
self.Refresh()
def OnLeftDown(self, event):
self.curLine = []
self.pos = event.GetPositionTuple()
self.CaptureMouse()
def OnLeftUp(self, event):
if self.HasCapture():
self.lines.append((self.color,
self.thickness,
self.curLine))
self.curLine = []
self.ReleaseMouse()
def OnMotion(self, event):
if event.Dragging() and event.LeftIsDown():
dc = wx.BufferedDC(wx.ClientDC(self), self.buffer)
self.drawMotion(dc, event)
event.Skip()
def drawMotion(self, dc, event):
dc.SetPen(self.pen)
newPos = event.GetPositionTuple()
coords = self.pos + newPos
self.curLine.append(coords)
dc.DrawLine(*coords)
self.pos = newPos
def OnSize(self, event):
self.reInitBuffer = True
def OnIdle(self, event):
if self.reInitBuffer:
self.InitBuffer()
self.Refresh(False)
def OnPaint(self, event):
dc = wx.BufferedPaintDC(self, self.buffer)
def DrawLines(self, dc):
for colour, thickness, line in self.lines:
pen = wx.Pen(colour, thickness, wx.SOLID)
dc.SetPen(pen)
for coords in line:
dc.DrawLine(*coords)
def SetColor(self, color):
self.color = color
self.pen = wx.Pen(self.color, self.thickness, wx.SOLID)
def SetThickness(self, num):
self.thickness = num
self.pen = wx.Pen(self.color, self.thickness, wx.SOLID)
class PaintFrame(wx.Frame):
def __init__(self, parent):
self.title = "Paint Frame"
wx.Frame.__init__(self, parent, -1, self.title, size=(800, 600))
self.paint = PaintWindow(self, -1)
self.paint.Bind(wx.EVT_MOTION, self.OnPaintMotion)
self.InitStatusBar()
self.CreateMenuBar()
self.filename = ""
self.CreatePanel()
def CreatePanel(self):
controlPanel = ControlPanel(self, -1, self.paint)
box = wx.BoxSizer(wx.HORIZONTAL)
box.Add(controlPanel, 0, wx.EXPAND)
box.Add(self.paint, -1, wx.EXPAND)
self.SetSizer(box)
def InitStatusBar(self):
self.statusbar = self.CreateStatusBar()
self.statusbar.SetFieldsCount(3)
self.statusbar.SetStatusWidths([-1, -2, -3])
def OnPaintMotion(self, event):
self.statusbar.SetStatusText(u"鼠标位置：" + str(event.GetPositionTuple()), 0)
self.statusbar.SetStatusText(u"当前线条长度：%s" % len(self.paint.curLine), 1)
self.statusbar.SetStatusText(u"线条数目：%s" % len(self.paint.lines), 2)
event.Skip()
def MenuData(self):
return [("&File", (
("&New", "New paint file", self.OnNew),
("&Open", "Open paint file", self.OnOpen),
("&Save", "Save paint file", self.OnSave),
("", "", ""),
("&Color", (
("&Black", "", self.OnColor, wx.ITEM_RADIO),
("&Red", "", self.OnColor, wx.ITEM_RADIO),
("&Green", "", self.OnColor, wx.ITEM_RADIO),
("&Blue", "", self.OnColor, wx.ITEM_RADIO),
("&Other", "", self.OnOtherColor, wx.ITEM_RADIO))),
("", "", ""),
("&Quit", "Quit", self.OnCloseWindow)))
]
def CreateMenuBar(self):
menuBar = wx.MenuBar()
for eachMenuData in self.MenuData():
menuLabel = eachMenuData[0]
menuItems = eachMenuData[1]
menuBar.Append(self.CreateMenu(menuItems), menuLabel)
self.SetMenuBar(menuBar)
def CreateMenu(self, menuData):
menu = wx.Menu()
for eachItem in menuData:
if len(eachItem) == 2:
label = eachItem[0]
subMenu = self.CreateMenu(eachItem[1])
menu.AppendMenu(wx.NewId(), label, subMenu)
else:
self.CreateMenuItem(menu, *eachItem)
return menu
def CreateMenuItem(self, menu, label, status, handler, kind=wx.ITEM_NORMAL):
if not label:
menu.AppendSeparator()
return
menuItem = menu.Append(-1, label, status, kind)
self.Bind(wx.EVT_MENU, handler, menuItem)
def OnNew(self, event):
pass
def OnOpen(self, event):
file_wildcard = "Paint files(*.paint)|*.paint|All files(*.*)|*.*"
dlg = wx.FileDialog(self, "Open paint file...",
os.getcwd(),
style=wx.OPEN,
wildcard=file_wildcard)
if dlg.ShowModal() == wx.ID_OK:
self.filename = dlg.GetPath()
self.ReadFile()
self.SetTitle(self.title + '--' + self.filename)
dlg.Destroy()
def OnSave(self, event):
if not self.filename:
self.OnSaveAs(event)
else:
self.SaveFile()
def OnSaveAs(self, event):
file_wildcard = "Paint files(*.paint)|*.paint|All files(*.*)|*.*"
dlg = wx.FileDialog(self,
"Save paint as ...",
os.getcwd(),
style=wx.SAVE | wx.OVERWRITE_PROMPT,
wildcard=file_wildcard)
if dlg.ShowModal() == wx.ID_OK:
filename = dlg.GetPath()
if not os.path.splitext(filename)[1]:
filename = filename + '.paint'
self.filename = filename
self.SaveFile()
self.SetTitle(self.title + '--' + self.filename)
dlg.Destroy()
def OnColor(self, event):
menubar = self.GetMenuBar()
itemid = event.GetId()
item = menubar.FindItemById(itemid)
color = item.GetLabel()
self.paint.SetColor(color)
def OnOtherColor(self, event):
dlg = wx.ColourDialog(self)
dlg.GetColourData().SetChooseFull(True)
if dlg.ShowModal() == wx.ID_OK:
self.paint.SetColor(dlg.GetColourData().GetColour())
dlg.Destroy()
def OnCloseWindow(self, event):
self.Destroy()
def SaveFile(self):
if self.filename:
data = self.paint.GetLinesData()
f = open(self.filename, 'w')
cPickle.dump(data, f)
f.close()
def ReadFile(self):
if self.filename:
try:
f = open(self.filename, 'r')
data = cPickle.load(f)
f.close()
self.paint.SetLinesData(data)
except cPickle.UnpicklingError:
wx.MessageBox("%s is not a paint file."
% self.filename, "error tip",
style=wx.OK | wx.ICON_EXCLAMATION)
class ControlPanel(wx.Panel):
BMP_SIZE = 16
BMP_BORDER = 3
NUM_COLS = 4
SPACING = 4
colorList = ('Black', 'Yellow', 'Red', 'Green', 'Blue', 'Purple',
'Brown', 'Aquamarine', 'Forest Green', 'Light Blue',
'Goldenrod', 'Cyan', 'Orange', 'Navy', 'Dark Grey',
'Light Grey')
maxThickness = 16
def __init__(self, parent, ID, paint):
wx.Panel.__init__(self, parent, ID, style=wx.RAISED_BORDER)
self.paint = paint
buttonSize = (self.BMP_SIZE + 2 * self.BMP_BORDER,
self.BMP_SIZE + 2 * self.BMP_BORDER)
colorGrid = self.createColorGrid(parent, buttonSize)
thicknessGrid = self.createThicknessGrid(buttonSize)
self.layout(colorGrid, thicknessGrid)
def createColorGrid(self, parent, buttonSize):
self.colorMap = {}
self.colorButtons = {}
colorGrid = wx.GridSizer(cols=self.NUM_COLS, hgap=2, vgap=2)
for eachColor in self.colorList:
bmp = self.MakeBitmap(eachColor)
b = wx.lib.buttons.GenBitmapToggleButton(self, -1, bmp, size=buttonSize)
b.SetBezelWidth(1)
b.SetUseFocusIndicator(False)
self.Bind(wx.EVT_BUTTON, self.OnSetColour, b)
colorGrid.Add(b, 0)
self.colorMap[b.GetId()] = eachColor
self.colorButtons[eachColor] = b
self.colorButtons[self.colorList[0]].SetToggle(True)
return colorGrid
def createThicknessGrid(self, buttonSize):
self.thicknessIdMap = {}
self.thicknessButtons = {}
thicknessGrid = wx.GridSizer(cols=self.NUM_COLS, hgap=2, vgap=2)
for x in range(1, self.maxThickness + 1):
b = wx.lib.buttons.GenToggleButton(self, -1, str(x), size=buttonSize)
b.SetBezelWidth(1)
b.SetUseFocusIndicator(False)
self.Bind(wx.EVT_BUTTON, self.OnSetThickness, b)
thicknessGrid.Add(b, 0)
self.thicknessIdMap[b.GetId()] = 2
self.thicknessButtons[x] = b
self.thicknessButtons[1].SetToggle(True)
return thicknessGrid
def layout(self, colorGrid, thicknessGrid):
box = wx.BoxSizer(wx.VERTICAL)
box.Add(colorGrid, 0, wx.ALL, self.SPACING)
box.Add(thicknessGrid, 0, wx.ALL, self.SPACING)
self.SetSizer(box)
box.Fit(self)
def OnSetColour(self, event):
color = self.colorMap[event.GetId()]
if color != self.paint.color:
self.colorButtons[self.paint.color].SetToggle(False)
self.paint.SetColor(color)
def OnSetThickness(self, event):
thickness = self.thicknessIdMap[event.GetId()]
if thickness != self.paint.thickness:
self.thicknessButtons[self.paint.thickness].SetToggle(False)
self.paint.SetThickness(thickness)
def MakeBitmap(self, color):
bmp = wx.EmptyBitmap(16, 15)
dc = wx.MemoryDC(bmp)
dc.SetBackground(wx.Brush(color))
dc.Clear()
dc.SelectObject(wx.NullBitmap)
return bmp
if __name__ == '__main__':
app = wx.PySimpleApp()
frame = PaintFrame(None)
frame.Show(True)
app.MainLoop()
原文地址：http://www.cnblogs.com/dyx1024/archive/2012/07/15/2592202.html