wxpython window 在事件处理后崩溃
wxpython window crashes after event handling
此代码读取图片并将其作为背景放在 window 中。
有两个问题我无法解释:
导入图片后,点击右上角的红色"X"不会关闭window。
如果您尝试拖动图像,程序会崩溃。
为什么会这样?
谢谢
import wx
import wx.lib.buttons as buttons
class Main(wx.Frame):
def __init__(self, parent, title):
wx.Frame.__init__(self, parent, id=-1, title=title, size=(300, 300))
self.initUI()
self.panel = wx.Panel(self, wx.ID_ANY, wx.DefaultPosition, size=(10000, 10000))
self.backGroundImage=''
self.Layout()
def initUI(self):
menubar = wx.MenuBar()
fileMenu = wx.Menu()
fileMenu.AppendSeparator()
imp = wx.Menu()
importBackgroundButton = imp.Append(wx.ID_ANY, 'Import background')
self.Bind(wx.EVT_MENU, self.OnImportBackground, importBackgroundButton)
fileMenu.AppendMenu(wx.ID_ANY, 'I&mport', imp)
menubar.Append(fileMenu, '&File')
self.SetMenuBar(menubar)
self.SetTitle('test')
self.Centre()
self.Show(True)
#load background
def OnImportBackground(self, e):
app = wx.App(None)
style = wx.FD_OPEN | wx.FD_FILE_MUST_EXIST
dialog = wx.FileDialog(None, 'Open', wildcard='*.png', style=style)
if dialog.ShowModal() == wx.ID_OK:
path = dialog.GetPath()
else:
path = None
dialog.Destroy()
self.backgroundImage = ButtonImage(self, self.panel, path, (0, 0))
W = self.backgroundImage.bmp.GetSize()[0]
H = self.backgroundImage.bmp.GetSize()[1]
self.SetSize((W+16, H+58))
self.Refresh()
#crash
class ButtonImage():
def __init__(self, parent, panel, nameImage, pos):
self.panel = panel
self.bmp = wx.Bitmap(nameImage, wx.BITMAP_TYPE_ANY)
self.maxPiecePositionX = self.panel.GetSize()[0] - self.bmp.GetSize()[0]
self.maxPiecePositionY = self.panel.GetSize()[1] - self.bmp.GetSize()[1]
self.bmapBtn = wx.BitmapButton(self.panel, id=wx.ID_ANY, bitmap=self.bmp, style=wx.NO_BORDER, pos=pos)
self.bmapBtn.Bind(wx.EVT_LEFT_DOWN, self.OnClickDown, self.bmapBtn)
self.bmapBtn.Bind(wx.EVT_LEFT_UP, self.OnClickUp, self.bmapBtn)
self.bmapBtn.Bind(wx.EVT_MOTION, self.MoveButton, self.bmapBtn)
self.hold = 0
self.holdPosition = (0, 0)
def EnterButton(self, event):
pass
def LeaveButton(self, event):
self.hold = 0
def OnClickDown(self, event):
obj = event.GetEventObject()
self.hold = 1
self.holdPosition = (event.GetX(), event.GetY())
def OnClickUp(self, event):
self.hold = 0
def MoveButton(self, event):
deltaX, deltaY = 0, 0
if self.hold:
deltaX = event.GetPosition()[0] - self.holdPosition[0]
deltaY = event.GetPosition()[1] - self.holdPosition[1]
newPositionX = self.bmapBtn.GetPosition()[0] + deltaX
newPositionY = self.bmapBtn.GetPosition()[1] + deltaY
if (0 < newPositionX < self.maxPiecePositionX) and (0 < newPositionY < self.maxPiecePositionY):
self.bmapBtn.SetPosition((newPositionX, newPositionY))
else:
self.holdPosition = self.holdPosition[0] + deltaX, self.holdPosition[1] + deltaY
self.bmapBtn.Raise()
self.bmapBtn.Refresh()
app = wx.App()
frame = Main(None, "Test")
frame.Show()
app.MainLoop()
这个例子问题太多,要花很长时间来解释。例如,你创建了一个新的 ButtonImage
,它本质上是一个 wx.BitmapButton
,每次你调用 OnImportBackground
而没有破坏旧的,堆叠了一组没有正确布局的位图按钮他们。
但是,每次调用 OnImportBackground
时,您都会实例化一个新的 wx.App
,这是什么把钉子钉进了棺材里。如果去掉这条线(完全没有意义),框架至少可以关闭。
但是要看到 "the right way (TM)" 做到这一点,请看 this Whosebug post。
此代码读取图片并将其作为背景放在 window 中。 有两个问题我无法解释:
导入图片后,点击右上角的红色"X"不会关闭window。
如果您尝试拖动图像,程序会崩溃。
为什么会这样? 谢谢
import wx
import wx.lib.buttons as buttons
class Main(wx.Frame):
def __init__(self, parent, title):
wx.Frame.__init__(self, parent, id=-1, title=title, size=(300, 300))
self.initUI()
self.panel = wx.Panel(self, wx.ID_ANY, wx.DefaultPosition, size=(10000, 10000))
self.backGroundImage=''
self.Layout()
def initUI(self):
menubar = wx.MenuBar()
fileMenu = wx.Menu()
fileMenu.AppendSeparator()
imp = wx.Menu()
importBackgroundButton = imp.Append(wx.ID_ANY, 'Import background')
self.Bind(wx.EVT_MENU, self.OnImportBackground, importBackgroundButton)
fileMenu.AppendMenu(wx.ID_ANY, 'I&mport', imp)
menubar.Append(fileMenu, '&File')
self.SetMenuBar(menubar)
self.SetTitle('test')
self.Centre()
self.Show(True)
#load background
def OnImportBackground(self, e):
app = wx.App(None)
style = wx.FD_OPEN | wx.FD_FILE_MUST_EXIST
dialog = wx.FileDialog(None, 'Open', wildcard='*.png', style=style)
if dialog.ShowModal() == wx.ID_OK:
path = dialog.GetPath()
else:
path = None
dialog.Destroy()
self.backgroundImage = ButtonImage(self, self.panel, path, (0, 0))
W = self.backgroundImage.bmp.GetSize()[0]
H = self.backgroundImage.bmp.GetSize()[1]
self.SetSize((W+16, H+58))
self.Refresh()
#crash
class ButtonImage():
def __init__(self, parent, panel, nameImage, pos):
self.panel = panel
self.bmp = wx.Bitmap(nameImage, wx.BITMAP_TYPE_ANY)
self.maxPiecePositionX = self.panel.GetSize()[0] - self.bmp.GetSize()[0]
self.maxPiecePositionY = self.panel.GetSize()[1] - self.bmp.GetSize()[1]
self.bmapBtn = wx.BitmapButton(self.panel, id=wx.ID_ANY, bitmap=self.bmp, style=wx.NO_BORDER, pos=pos)
self.bmapBtn.Bind(wx.EVT_LEFT_DOWN, self.OnClickDown, self.bmapBtn)
self.bmapBtn.Bind(wx.EVT_LEFT_UP, self.OnClickUp, self.bmapBtn)
self.bmapBtn.Bind(wx.EVT_MOTION, self.MoveButton, self.bmapBtn)
self.hold = 0
self.holdPosition = (0, 0)
def EnterButton(self, event):
pass
def LeaveButton(self, event):
self.hold = 0
def OnClickDown(self, event):
obj = event.GetEventObject()
self.hold = 1
self.holdPosition = (event.GetX(), event.GetY())
def OnClickUp(self, event):
self.hold = 0
def MoveButton(self, event):
deltaX, deltaY = 0, 0
if self.hold:
deltaX = event.GetPosition()[0] - self.holdPosition[0]
deltaY = event.GetPosition()[1] - self.holdPosition[1]
newPositionX = self.bmapBtn.GetPosition()[0] + deltaX
newPositionY = self.bmapBtn.GetPosition()[1] + deltaY
if (0 < newPositionX < self.maxPiecePositionX) and (0 < newPositionY < self.maxPiecePositionY):
self.bmapBtn.SetPosition((newPositionX, newPositionY))
else:
self.holdPosition = self.holdPosition[0] + deltaX, self.holdPosition[1] + deltaY
self.bmapBtn.Raise()
self.bmapBtn.Refresh()
app = wx.App()
frame = Main(None, "Test")
frame.Show()
app.MainLoop()
这个例子问题太多,要花很长时间来解释。例如,你创建了一个新的 ButtonImage
,它本质上是一个 wx.BitmapButton
,每次你调用 OnImportBackground
而没有破坏旧的,堆叠了一组没有正确布局的位图按钮他们。
但是,每次调用 OnImportBackground
时,您都会实例化一个新的 wx.App
,这是什么把钉子钉进了棺材里。如果去掉这条线(完全没有意义),框架至少可以关闭。
但是要看到 "the right way (TM)" 做到这一点,请看 this Whosebug post。