ich beschäftige mich erst seit kurzem mit Python und wurde sozusagen "ins Kalte Wasser gestoßen"
Ich soll für ein Projekt einen Wizard mit einer Baumstruktur programmieren.
Ich habe im netz auch schon was gefunden... zumindest was mir beim Baum um einiges weiter hilft:
Code: Alles auswählen
import wx
class Treebook(wx.Panel):
def __init__(self, parent, id=wx.ID_ANY, pos=wx.DefaultPosition,
size=wx.DefaultSize, orientation=wx.HORIZONTAL,
style=wx.NO_BORDER|wx.TR_DEFAULT_STYLE|wx.TR_HIDE_ROOT):
wx.Panel.__init__(self, parent, wx.ID_ANY,
style=wx.NO_BORDER|wx.CLIP_CHILDREN|wx.TAB_TRAVERSAL)
#This is the main sizer which could be either horizontal or vertical
self.hbox = wx.BoxSizer(orientation)
#adding a tree control to the hbox
self.tree = wx.TreeCtrl(self, id, pos, size, style)
self.n_pages=0
if orientation==wx.HORIZONTAL:
self.vbox = wx.BoxSizer(wx.VERTICAL)
self.hbox.Add(self.tree, 0, wx.EXPAND|wx.LEFT|wx.TOP|wx.BOTTOM, 5)
#doing the raised panel
self.rpanel = wx.Panel(self, -1,style=wx.RAISED_BORDER)
#doing the static box sizer
self.sbox = wx.StaticBoxSizer(wx.StaticBox(self.rpanel,-1,""))
#this one is for adding a 5 pixel border all around the static box.
box = wx.BoxSizer(wx.VERTICAL)
box.Add(self.sbox, 1, wx.EXPAND|wx.ALL, 5)
self.rpanel.SetSizer(box)
box.Layout()
#adding the raised panel to vbox (right side)
self.vbox.Add(self.rpanel, 1, wx.EXPAND|wx.ALL, 5)
#adding the right side to the hbox
self.hbox.Add(self.vbox, 1, wx.EXPAND|wx.ALL, 0)
else:
self.hbox.Add(self.tree, 0, wx.EXPAND|wx.ALL, 5)
self.vbox=self.hbox
self.rpanel = wx.Panel(self, -1)
#doing the static box sizer
self.sbox = wx.StaticBoxSizer(wx.StaticBox(self.rpanel,-1,""))
self.rpanel.SetSizer(self.sbox)
self.sbox.Layout()
#adding the raised panel to hbox (bottom half)
self.hbox.Add(self.rpanel,1,wx.EXPAND|wx.LEFT|wx.RIGHT|wx.BOTTOM,5)
self.hbox.Layout()
self.SetSizer(self.hbox)
#adding a root to the tree control (remember, root is invisible)
self.root = self.tree.AddRoot("")
self.tree.Bind(wx.EVT_TREE_SEL_CHANGED, self.OnSelChanged)
if "__WXGTK__" in wx.PlatformInfo:
self.tree.SetFocus()
def AddPage(self, parentItem, text, page,name=None):
page.Reparent(self.rpanel)
page.Hide()
item = self.tree.AppendItem(parentItem, text)
self.tree.SetPyData(item, page)
#Was a name passed to AddPage?
if name is None:
try: name=page._name
except: page._name=""
else:
page._name = name
#each page is tagged with an id, n_pages is the total number of pages
page._id = self.n_pages
self.n_pages+=1
return item
def ShowPage(self,item):
newpage = self.tree.GetPyData(item)
self.sbox.GetStaticBox().SetLabel(newpage._name)
self.sbox.Add(newpage, 1, wx.EXPAND|wx.ALL, 5)
newpage.Show()
self.sbox.Layout()
def OnSelChanged(self, evt):
olditem = evt.GetOldItem()
if not olditem.IsOk(): return
item = evt.GetItem()
oldpage = self.tree.GetPyData(olditem)
self.sbox.Remove(oldpage)
oldpage.Hide()
self.ShowPage(item)
class TreebookDialog(wx.Dialog):
def __init__(self,parent,size,orientation=wx.HORIZONTAL):
wx.Dialog.__init__(self, parent, -1, "Treebook Dialog", size=size)
self.tb=Treebook(self,-1,size=(125,65),orientation=orientation)
self.tree = self.tb.tree
self.root = self.tb.root
self.AddPage = self.tb.AddPage
self.ShowPage = self.tb.ShowPage
box = wx.BoxSizer(wx.VERTICAL)
box.Add(self.tb, 1, wx.EXPAND|wx.ALL,5)
#horizontal sizer for the buttons
self.bbox = wx.BoxSizer(wx.HORIZONTAL)
self.btn_back = wx.Button(self.tb, wx.ID_BACKWARD,"< Back")
self.btn_back.Disable()
self.btn_back.Bind(wx.EVT_BUTTON, self.OnButton)
self.btn_next = wx.Button(self.tb, wx.ID_FORWARD,"Next >")
self.btn_next.Bind(wx.EVT_BUTTON, self.OnButton)
self.btn_ok = wx.Button(self.tb, wx.ID_OK)
self.btn_cancel = wx.Button(self.tb, wx.ID_CANCEL)
self.bbox.Add(self.btn_back, 0, wx.LEFT, 20)
self.bbox.Add(self.btn_next, 0, wx.LEFT, 5)
self.bbox.Add(self.btn_ok, 0, wx.LEFT, 5)
self.bbox.Add(self.btn_cancel, 0, wx.LEFT, 5)
#add the sizer to tb.vbox, the right/bottom half of the treectrl
self.tb.vbox.Add(self.bbox, 0, wx.BOTTOM, 5)
self.tb.vbox.Layout()
box.Layout()
self.SetSizer(box)
self.tree.Bind(wx.EVT_TREE_SEL_CHANGED, self.OnSelChanged)
def OnButton(self,evt):
id=evt.GetId()
item=self.tree.GetSelection()
page=self.tree.GetPyData(item)
if id == wx.ID_FORWARD:
if page._id < self.tb.n_pages-1:
item=self.tree.GetNextVisible(item)
self.tree.SelectItem(item)
elif id == wx.ID_BACKWARD:
if page._id > 0:
item=self.tree.GetPrevVisible(item)
self.tree.SelectItem(item)
#Expand collapsed items (easier to navigate the tree with buttons only)
if self.tree.ItemHasChildren(item) and self.tree.IsExpanded(item)==0:
self.tree.Expand(item)
def OnSelChanged(self,evt):
"""This method checks the value of panel._id and changes the state of
the buttons accordingly. It then skips the event for Treebook"""
item=self.tree.GetSelection()
page=self.tree.GetPyData(item)
if page._id==0:
if self.btn_back.IsEnabled()==1: self.btn_back.Disable()
if self.btn_next.IsEnabled()==0: self.btn_next.Enable()
elif page._id==self.tb.n_pages-1:
if self.btn_next.IsEnabled()==1: self.btn_next.Disable()
if self.btn_back.IsEnabled()==0: self.btn_back.Enable()
else:
if self.btn_back.IsEnabled()==0: self.btn_back.Enable()
if self.btn_next.IsEnabled()==0: self.btn_next.Enable()
evt.Skip()
if __name__ == "__main__":
class AboutPanel(wx.Panel):
def __init__(self, parent,text,name="About Treebook for wxPython"):
wx.Panel.__init__(self, parent, -1)
self._name=name
box = wx.BoxSizer(wx.VERTICAL)
if text.rfind("---") > -1:
about,ver=text.split("---")
box.Add(wx.StaticText(self,-1,about),1,wx.EXPAND)
box.Add(wx.StaticText(self,-1,ver),0,wx.EXPAND|wx.ALIGN_BOTTOM)
else:
box.Add(wx.StaticText(self,-1,text),1,wx.EXPAND)
box.Layout()
self.SetSizer(box)
class ColorPanel(wx.Panel):
def __init__(self, parent, color=None):
wx.Panel.__init__(self, parent, -1)
if color is None:
self._name="Empty panel"
else:
self.SetBackgroundColour(color)
self._name="Colour: %s" % str(color)
# TBDExample is derived from TreebookDialog,
# this is how you want to build your own dialogs based of TreebookDialog
class TBDExample(TreebookDialog):
def __init__(self,parent,orientation=wx.HORIZONTAL,show_images=1):
TreebookDialog.__init__(self,parent,wx.Size(500,400),orientation)
#create some panels...
MyAboutPanel = AboutPanel(self,str_about+"---"+str_version)
MyHowPanel = AboutPanel(self,str_how)
MyTodoPanel = AboutPanel(self,str_todo)
MyEmptyPanel = ColorPanel(self) #Will appear twice in the treebook
MyRedPanel = ColorPanel(self, "red")
MyGreenPanel = ColorPanel(self, "green")
MyBluePanel = ColorPanel(self, "blue")
MyYellowPanel = ColorPanel(self, "yellow")
items=[] #will be used for adding icons to the treectrl items
child = self.AddPage(self.root, "About",MyAboutPanel)
items.append(child)
items.append(self.AddPage(child, "How", MyHowPanel))
items.append(self.AddPage(child, "Todo", MyTodoPanel))
child = self.AddPage(self.root, "Colour panels", MyEmptyPanel)
items.append(child)
items.append(self.AddPage(child, "Red", MyRedPanel))
items.append(self.AddPage(child, "Green", MyGreenPanel))
child = self.AddPage(self.root, "More panels", MyEmptyPanel)
items.append(child)
items.append(self.AddPage(child, "Blue", MyBluePanel))
items.append(self.AddPage(child, "Yellow", MyYellowPanel))
self.ShowPage(items[0]) #show (and select) the "about" page
#caution, the following is only safe if the item has children!
self.tree.Expand(items[0]) #expand the "about" children
#Add a few images to the treectrl (if show_images is true)
if show_images:
isz = (16,16)
il = wx.ImageList(isz[0], isz[1])
fld = il.Add(wx.ArtProvider_GetBitmap(wx.ART_FOLDER,
wx.ART_OTHER, isz))
fldo = il.Add(wx.ArtProvider_GetBitmap(wx.ART_FILE_OPEN,
wx.ART_OTHER, isz))
file = il.Add(wx.ArtProvider_GetBitmap(wx.ART_NORMAL_FILE,
wx.ART_OTHER, isz))
self.tree.SetImageList(il)
for it in items:
if self.tree.ItemHasChildren(it): #use a folder icon
self.tree.SetItemImage(it,fld,wx.TreeItemIcon_Normal)
self.tree.SetItemImage(it,fldo,wx.TreeItemIcon_Expanded)
else: #use a file icon
self.tree.SetItemImage(it,file,wx.TreeItemIcon_Normal)
self.tree.il=il #This prevents the imagelist from being lost
def Success(self,val):
#you can call this before the dialog is destroyed
if val == wx.ID_OK:
s = "OK"
else: s = "Cancel"
return "You pressed %s. You can resize this frame." % s
class Frame(wx.Frame):
def __init__(self, pos=wx.DefaultPosition, size=(500,400)):
wx.Frame.__init__(self, None, -1, "Treebook in a frame", pos, size)
self.CreateStatusBar()
str_about = """Usage:\n
Navigate the pages using either the tree control or the buttons."""
str_version = """Treebook Dialog v1.0 - Egor Zindy - Public domain
Thanks to Ricardo Pedroso for the original Treebook sample"""
str_how = """Things to try in main():\n
- set show_images to 0 to remove the icons in the treectrl\n
- set orientation to either wx.HORIZONTAL or wx.VERTICAL\n
Design considerations:\n
- Treebook.AddPage appends an integer _id to each page and increments Treebook.n_pages, the number of pages. This is then used in TreebookDialog to activate/deactivate the [back] and [next] buttons at the bounds.\n
- Treebook.AddPage also changes the page parent to treebook.rpanel (this hides the internal structure of the dialog).\n
- Treebook.ShowPage handles the display of pages and changes the staticbox label to page._name.\n"""
str_todo = "Todo:\n\n - Sort-out the treebook layout: V/H duplicate code"
def main():
app = wx.PySimpleApp()
### First example, a treebook panel in a modal dialog
tbd = TBDExample(None,orientation=wx.HORIZONTAL,show_images=1)
val=tbd.ShowModal()
s=tbd.Success(val)
### Next example, a treebook panel in a frame (not a complete example)
f = Frame(tbd.GetPosition())
# There's a treebook in TBDExample. Look away while I reparent it...
tbd.tb.Reparent(f) #reparenting the treebook as a child of Frame f
tbd.tb.vbox.Hide(tbd.bbox) #hiding the buttons
tbd.tree.Unbind(wx.EVT_TREE_SEL_CHANGED) #this is OnSelChanged in tbd
tbd.Destroy() #tbd can now safely be destroyed
f.Show()
f.SetStatusText(s)
app.MainLoop()
main()
wx._core.PyAssertionError: C++ assertion "wxAssertFailure" failed at /BUILD/wxPython-src-2.8.7.1/src/generic/treectlg.cpp(1358) in GetPrevVisible(): not implemented"
Hat einer ne Idee und kann mir weiterhelfen?
Oder liegt das evtl. am OS X???