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Viewing changes to vendor/Twisted-10.0.0/twisted/spread/ui/tktree.py

  • Committer: Jesse Andrews
  • Date: 2010-05-28 06:05:26 UTC
  • Revision ID: git-v1:bf6e6e718cdc7488e2da87b21e258ccc065fe499
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vendor/Twisted-10.0.0/twisted/spread/ui/tktree.py
 
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# Copyright (c) 2001-2004 Twisted Matrix Laboratories.
 
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# See LICENSE for details.
 
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"""
 
5
What I want it to look like:
 
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+- One
 
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| \- Two
 
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| |- Three
 
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| |- Four
 
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| +- Five
 
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| | \- Six
 
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| |- Seven
 
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+- Eight
 
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| \- Nine
 
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"""
 
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import os
 
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from Tkinter import *
 
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class Node:
 
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    def __init__(self):
 
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        """
 
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        Do whatever you want here.
 
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        """
 
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        self.item=None
 
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    def getName(self):
 
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        """
 
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        Return the name of this node in the tree.
 
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        """
 
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        pass
 
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    def isExpandable(self):
 
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        """
 
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        Return true if this node is expandable.
 
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        """
 
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        return len(self.getSubNodes())>0
 
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    def getSubNodes(self):
 
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        """
 
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        Return the sub nodes of this node.
 
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        """
 
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        return []
 
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    def gotDoubleClick(self):
 
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        """
 
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        Called when we are double clicked.
 
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        """
 
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        pass
 
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    def updateMe(self):
 
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        """
 
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        Call me when something about me changes, so that my representation
 
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        changes.
 
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        """
 
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        if self.item:
 
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            self.item.update()
 
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class FileNode(Node):
 
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    def __init__(self,name):
 
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        Node.__init__(self)
 
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        self.name=name
 
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    def getName(self):
 
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        return os.path.basename(self.name)
 
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    def isExpandable(self):
 
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        return os.path.isdir(self.name)
 
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    def getSubNodes(self):
 
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        names=map(lambda x,n=self.name:os.path.join(n,x),os.listdir(self.name))
 
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        return map(FileNode,names)
 
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class TreeItem:
 
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    def __init__(self,widget,parent,node):
 
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        self.widget=widget
 
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        self.node=node
 
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        node.item=self
 
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        if self.node.isExpandable():
 
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            self.expand=0
 
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        else:
 
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            self.expand=None
 
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        self.parent=parent
 
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        if parent:
 
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            self.level=self.parent.level+1
 
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        else:
 
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            self.level=0
 
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        self.first=0 # gets set in Tree.expand()
 
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        self.subitems=[]
 
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    def __del__(self):
 
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        del self.node
 
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        del self.widget
 
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    def __repr__(self):
 
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        return "<Item for Node %s at level %s>"%(self.node.getName(),self.level)
 
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    def render(self):
 
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        """
 
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        Override in a subclass.
 
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        """
 
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        raise NotImplementedError
 
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    def update(self):
 
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        self.widget.update(self)
 
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class ListboxTreeItem(TreeItem):
 
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    def render(self):
 
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        start=self.level*"|    "
 
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        if self.expand==None and not self.first:
 
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            start=start+"|"
 
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        elif self.expand==0:
 
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            start=start+"L"
 
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        elif self.expand==1:
 
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            start=start+"+"
 
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        else:
 
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            start=start+"\\"
 
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        r=[start+"- "+self.node.getName()]
 
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        if self.expand:
 
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            for i in self.subitems:
 
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                r.extend(i.render())
 
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        return r
 
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class ListboxTree:
 
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    def __init__(self,parent=None,**options):
 
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        self.box=apply(Listbox,[parent],options)
 
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        self.box.bind("<Double-1>",self.flip)
 
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        self.roots=[]
 
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        self.items=[]
 
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    def pack(self,*args,**kw):
 
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        """
 
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        for packing.
 
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        """
 
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        apply(self.box.pack,args,kw)
 
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    def grid(self,*args,**kw):
 
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        """
 
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        for gridding.
 
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        """
 
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        apply(self.box.grid,args,kw)
 
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    def yview(self,*args,**kw):
 
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        """
 
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        for scrolling.
 
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        """
 
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        apply(self.box.yview,args,kw)
 
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    def addRoot(self,node):
 
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        r=ListboxTreeItem(self,None,node)
 
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        self.roots.append(r)
 
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        self.items.append(r)
 
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        self.box.insert(END,r.render()[0])
 
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        return r
 
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    def curselection(self):
 
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        c=self.box.curselection()
 
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        if not c: return
 
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        return self.items[int(c[0])]
 
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    def flip(self,*foo):
 
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        if not self.box.curselection(): return
 
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        item=self.items[int(self.box.curselection()[0])]
 
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        if item.expand==None: return
 
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        if not item.expand:
 
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            self.expand(item)
 
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        else:
 
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            self.close(item)
 
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        item.node.gotDoubleClick()
 
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    def expand(self,item):
 
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        if item.expand or item.expand==None: return
 
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        item.expand=1
 
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        item.subitems=map(lambda x,i=item,s=self:ListboxTreeItem(s,i,x),item.node.getSubNodes())
 
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        if item.subitems:
 
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            item.subitems[0].first=1
 
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        i=self.items.index(item)
 
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        self.items,after=self.items[:i+1],self.items[i+1:]
 
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        self.items=self.items+item.subitems+after
 
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        c=self.items.index(item)
 
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        self.box.delete(c)
 
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        r=item.render()
 
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        for i in r:
 
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            self.box.insert(c,i)
 
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            c=c+1
 
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    def close(self,item):
 
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        if not item.expand: return
 
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        item.expand=0
 
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        length=len(item.subitems)
 
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        for i in item.subitems:
 
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            self.close(i)
 
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        c=self.items.index(item)
 
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        del self.items[c+1:c+1+length]
 
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        for i in range(length+1):
 
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            self.box.delete(c)
 
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        self.box.insert(c,item.render()[0])
 
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    def remove(self,item):
 
180
        if item.expand:
 
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            self.close(item)
 
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        c=self.items.index(item)
 
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        del self.items[c]
 
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        if item.parent:
 
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            item.parent.subitems.remove(item)
 
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        self.box.delete(c)
 
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    def update(self,item):
 
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        if item.expand==None:
 
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            c=self.items.index(item)
 
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            self.box.delete(c)
 
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            self.box.insert(c,item.render()[0])
 
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        elif item.expand:
 
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            self.close(item)
 
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            self.expand(item)
 
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if __name__=="__main__":
 
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    tk=Tk()
 
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    s=Scrollbar()
 
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    t=ListboxTree(tk,yscrollcommand=s.set)
 
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    t.pack(side=LEFT,fill=BOTH)
 
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    s.config(command=t.yview)
 
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    s.pack(side=RIGHT,fill=Y)
 
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    t.addRoot(FileNode("C:/"))
 
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    #mainloop()