[Python.NET] binding python objects to treenodes

[Guy Robinson]

Hello,

Is there a way to bind a python object to a treeView node? I have the following 
treenode based class:

class dataNode(WinForms.TreeNode):

 def __init__(self,name,total):
 self.Text = name
 self.Total = total

And I add the node as such:

self.treeView1.Nodes.Add(dataNode("testnode",3))

But when I try and access the attributes it doesn't work?

for node in self.treeView1.Nodes:
   print node.Total

Or should I keep the nodes in a list and access by index?

Any help appeciated.

Guy



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[Python.NET] winForms, threading and dragdrop ?

[Guy Robinson]

From the attached code.With AllowDrop = True I get a .NET error as follows:

System.InvalidOperationException: DragDrop registration failed. ---> 
System.Threading.ThreadStateException: The current thread must set to Single 
Thread Apartment (STA) mode before OLE calls can be made.  Ensure that your Main 
function has STAThreadAttribute marked on it.


From googling I need to set ApartmentState.STA. But this is readonly. How do I 
set STA correctly in Python for .NET?


Any thoughts appeciated.

Guy

from CLR import System
import CLR.System.Windows.Forms as WinForms
from CLR.System.Drawing import Color, Size, Point

from CLR.System import ComponentModel,Data, Collections, Threading
from CLR.System.Runtime import InteropServices

class dataNode(WinForms.TreeNode):

def __init__(self,name,total,skill):   
self.Text = name
self.Total = total
self.Skill = skill

class DnDTree(WinForms.Form):
"""A WinForms example.
"""

def __init__(self):
self.components = System.ComponentModel.Container()
self.treeView1 = WinForms.TreeView()
self.listBox1 = WinForms.ListBox()
self.SuspendLayout()

# Set properties of TreeView 1.
self.treeView1.AllowDrop = True
self.treeView1.ImageIndex = -1
self.treeView1.Location = System.Drawing.Point(24, 32)
self.treeView1.CheckBoxes = True
self.treeView1.Name = "treeView1"
self.treeView1.Nodes.Clear()
self.treeView1.BeginUpdate()
for pnode in range(50):
self.treeView1.Nodes.Add(dataNode("node%d"%pnode,3,"high"))
for cnode in range(15):
self.treeView1.Nodes[pnode].Nodes.Add("childnode%d"%cnode)
self.treeView1.EndUpdate()
#for node in self.treeView1.Nodes:
#print node.Total
self.treeView1.SelectedImageIndex = -1
self.treeView1.Size = System.Drawing.Size(300, 600)
self.treeView1.TabIndex = 0
#self.treeView1.MouseDown += 
System.Windows.Forms.MouseEventHandler(self.treeView1_MouseDown)
#self.treeView1.AfterSelect += 
System.Windows.Forms.TreeViewEventHandler(self.treeView1_AfterSelect)
#self.treeView1.QueryContinueDrag += 
System.Windows.Forms.QueryContinueDragEventHandler(self.treeView1_QueryContinueDrag)
#self.treeView1.DragEnter += 
System.Windows.Forms.DragEventHandler(self.treeView1_DragEnter)
#self.treeView1.ItemDrag += 
System.Windows.Forms.ItemDragEventHandler(self.treeView1_ItemDrag)

# Set properties of ListBox 1.
self.listBox1.AllowDrop = True
self.listBox1.Location = System.Drawing.Point(24, 650)
self.listBox1.Name = "listBox1"
self.listBox1.Size = System.Drawing.Size(300, 300)
self.listBox1.TabIndex = 1
#self.listBox1.DragDrop += 
System.Windows.Forms.DragEventHandler(self.listBox1_DragDrop)
#self.listBox1.DragEnter += 
System.Windows.Forms.DragEventHandler(self.listBox1_DragEnter)

#Now do Form
self.AutoScaleBaseSize = System.Drawing.Size(5,13)
self.ClientSize = System.Drawing.Size(400,1024)
self.Controls.Add(self.listBox1)
self.Controls.Add(self.treeView1)
self.ShowInTaskbar = False
self.StartPosition = WinForms.FormStartPosition.CenterScreen
self.Name = "Form1"
self.Text = "Form1"
self.ResumeLayout(False)

def Dispose(self):
self.components.Dispose()
WinForms.Form.Dispose(self)

def main():
app = DnDTree()
WinForms.Application.Run(app)
app.Dispose()

if __name__ == '__main__':
main()_
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