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I want to add two different items that have the same name to a TreeView but they have a different parent. But I get the error:

Item 'layer 7' already exists in the TreeView

What should I do to avoid this.

My code:

import maya.cmds as cmds
import os

window = cmds.window()
layout = cmds.formLayout()

control = cmds.treeView( parent = layout, numberOfButtons = 0, abr = False )

cmds.formLayout(layout,e=True, attachForm=(control,'top', 2))
cmds.formLayout(layout,e=True, attachForm=(control,'left', 2))
cmds.formLayout(layout,e=True, attachForm=(control,'bottom', 2))
cmds.formLayout(layout,e=True, attachForm=(control,'right', 2))

cmds.showWindow( window )
startpath="C:/MyFolder/"    

cmds.treeView( control, e=True, addItem = ("layer 1", ""))
cmds.treeView( control, e=True, addItem = ("layer 2", ""))
cmds.treeView( control, e=True, addItem = ("layer 3", ""))
cmds.treeView( control, e=True, addItem = ("layer 4", ""))
cmds.treeView( control, e=True, addItem = ("layer 5", ""))
cmds.treeView( control, e=True, addItem = ("layer 6", ""))
cmds.treeView( control, e=True, addItem = ("layer 7", "layer 2"))
cmds.treeView( control, e=True, addItem = ("layer 7", "layer 3"))
cmds.treeView( control, e=True, addItem = ("layer 9", "layer 2"))
cmds.treeView( control, e=True, addItem = ("layer 10", "layer 8"))
cmds.treeView( control, e=True, addItem = ("layer 11", "layer 2"))
cmds.treeView( control, e=True, addItem = ("layer 12", ""))
cmds.treeView( control, e=True, addItem = ("layer 13", "layer 10"))

N. B: I tried to find a solution here but in vain.

IT World
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2 Answers2

1

you are trying to put your "layer 7" into two different parents, that why

cmds.treeView( control, e=True, addItem = ("layer 7", "layer 2"))
cmds.treeView( control, e=True, addItem = ("layer 7", "layer 3"))

=== Edit ===

I've miss-read your question. So it is a limitation on how maya.cmds wrap Qt QTreeView. If you want to have twice layer 7 in your graph, here is how I would do this in cmds :

import maya.cmds as cmds
from collections import defaultdict

treepop = defaultdict(list)
treepop[""]=['layer_1_0',
             'layer_2_0',
             'layer_3_0',
             'layer_4_0',
             'layer_5_0',
             'layer_6_0',
             'layer_12_0']
treepop["layer_2_0"] = ['layer_7_1',
                        'layer_9_1',
                        'layer_11_1']
treepop["layer_3_0"] = ['layer_7_2']
treepop["layer_8_0"] = ['layer_10_1']
treepop["layer_10_0"] = ['layer_13_1']


window = cmds.window()
layout = cmds.formLayout()

control = cmds.treeView( parent = layout, numberOfButtons = 0, abr = False )

cmds.formLayout(layout,e=True, attachForm=(control,'top', 2))
cmds.formLayout(layout,e=True, attachForm=(control,'left', 2))
cmds.formLayout(layout,e=True, attachForm=(control,'bottom', 2))
cmds.formLayout(layout,e=True, attachForm=(control,'right', 2))

cmds.showWindow( window )

for k in treepop[""]:
    cmds.treeView( control, e=True, addItem=(k, ""))
for k in treepop:
    if k == "":
        continue
    for v in treepop[k]:
        cmds.treeView( control, e=True, addItem=(v, k))

so you can strip the last '_' to get the name of the layer.

Otherwise, wrap yourself QtWidgets.QTreeView or QTreeWidget, it might be even easier

=== EDIT 2 ===

I have an example on how you can extend maya.cmds with qtreewidget :

from PySide2 import QtWidgets
from maya import OpenMayaUI, cmds
from collections import defaultdict
import shiboken2

treepop = defaultdict(list)
treepop[""]=['layer_1',
             'layer_2',
             'layer_3',
             'layer_4',
             'layer_5',
             'layer_6',
             'layer_12']
treepop["layer_2"] = ['layer_7',
                        'layer_9',
                        'layer_11']
treepop["layer_3"] = ['layer_7']
treepop["layer_8"] = ['layer_10']
treepop["layer_10"] = ['layer_13']

def mayaToQT(name):
    # Maya -> QWidget
    ptr = OpenMayaUI.MQtUtil.findControl(name)
    if ptr is None:         ptr = OpenMayaUI.MQtUtil.findLayout(name)
    if ptr is None:         ptr = OpenMayaUI.MQtUtil.findMenuItem(name)
    if ptr is not None:     return shiboken2.wrapInstance(long(ptr),
                                                          QtWidgets.QWidget)


cmds.window()
layout = cmds.columnLayout(rowSpacing=10, columnWidth=250)
qwidget= mayaToQT(layout)
qlayout = qwidget.children()[0]
treeview = QtWidgets.QTreeWidget()
treeview.setSelectionMode(QtWidgets.QAbstractItemView.ExtendedSelection)
treeview.setColumnCount(1)
treeview.setAlternatingRowColors(True)
treeview.clear()
qlayout.addWidget(treeview)

items = []
for k in treepop[""]:
    root_item = QtWidgets.QTreeWidgetItem()
    root_item.setText(0,k)
    print(k)

    if k in treepop:
        for v in treepop[k]:
            child_item = QtWidgets.QTreeWidgetItem()
            child_item.setText(0,v)
            root_item.addChild(child_item)

    items.append(root_item)
treeview.addTopLevelItems(items)

cmds.showWindow()

def getSelected():
    items = treeview.selectedItems()
    for i in items:
        print(i.text(0))
DrWeeny
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  • If you read my question you will see that is what I want to do – IT World Oct 08 '19 at 12:24
  • It is a limitation of maya treeview. You have to use PyQt if you want to push further. Otherwise give it another name and embed his real data inside a dictionary – DrWeeny Oct 08 '19 at 12:47
  • Lik3 layer = { 'item8':'layer7', 'item7':'layer7', 'item3':'layer3'} – DrWeeny Oct 08 '19 at 12:50
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    i have added another example by extending maya cmds to qt – DrWeeny Oct 08 '19 at 19:29
  • For example, if I have this tree folders (https://drive.google.com/open?id=10IT-ScoFF1lM-iRKvQJnD7POksOsWk68), How can I display them into my treeview using your answer? – IT World Nov 04 '19 at 11:33
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    you can add a third loop and add a child to "child_item" : child_item.addChild(subChild) – DrWeeny Nov 04 '19 at 21:11
  • And if I don't know how much I have of subfolders until I'll find the files that I want to display? – IT World Nov 07 '19 at 10:00
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    I cant really tell you how to get your datas. If you have to do a recursive loop with while, you can add any number of sub-child / level in the tree – DrWeeny Nov 07 '19 at 16:45
0

You can use 'displayLabel' and generate unique id for items:

id = "layer 7" + "layer 3"
cmds.treeView(control, e=True, addItem=(id, "layer 3"))
cmds.treeView(control, e=True, displayLabel=(id, "layer 7"))
Eugene L.
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