Sure.
from PySide import QtCore, QtGui
# Some random class
class MyCustomType(object):
foo = "foo"
bar = 1
d = {}
l = []
s = set()
# On top of the standard roles that Qt uses such as DisplayRole,
TextAlignmentRole, ...
# We can add our own data from anything starting with UserRole and higher
# Qt wont touch roles this high up
OBJECT_ROLE = QtCore.Qt.UserRole + 1
tree = QtGui.QTreeWidget()
# Create a random instance
# And a tree item
anObject = MyCustomType()
i = QtGui.QTreeWidgetItem()
# Set our instance as a custom data role
col = 0
i.setData(col, OBJECT_ROLE, anObject)
# add to tree
tree.addTopLevelItem(i)
# Now fetch it back out again by row, column
item = tree.itemAt(0, col)
print item.data(0, OBJECT_ROLE)
# <__main__.MyCustomType at 0x103f1d090>
On Sep 24, 2013, at 8:38 PM, shapeofmotion wrote:
> On Sunday, September 22, 2013 10:02:07 PM UTC+2, Justin Israel wrote:
>> Why does the object need to be serialized to json? Can't you just store your
>> object as data directly?
>>
>> Also, you could subclass QTreeWidgetItem and store a custom item in the
>> tree.
>>
>> On Sep 22, 2013 11:39 PM, "shapeofmotion" <[email protected]> wrote:
>>
>> Hi,
>>
>> First off thanks for a great forum!
>>
>>
>>
>> I am using the pyside QTreeWidget to create a basic ui to list which
>> materials and or SG that has a specific V-Ray material ID assigned to it.
>> The widget lists parent items with the shader ID as label and the child
>> items are the materials or SG that have that ID assigned.
>>
>>
>>
>>
>> I have assigned the name of the material to the data attr so that when the
>> item is clicked the material gets selected in the hypershade. As it works
>> now if I were to rename the material it would no longer work since the
>> widget is pointing to the name and not to the actual object.
>>
>>
>>
>>
>> I am sort of stuck here, my initial idea was to serialize a dict that was
>> pointing to the pyNode, but the JSON.dumps method is giving me errors that
>> my dict is not JSON serializable.
>>
>>
>>
>> I am pretty new to pyside and especially the qtreewidget so any tips, ideas
>> or pointers are very welcome!
>>
>>
>>
>> Thanks, Johan
>>
>>
>>
>> --
>>
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>
> As you pointed out the best way is obviously to store the object as a custom
> data type in the threewidgetitem. I am quite new to pyside and found the
> documentation (http://srinikom.github.io/pyside-docs/) on the subject a bit
> hard to grasp. Do you have any good tips on how to do this or can you point
> me to some information on the subject?
>
> Best regards,
> Johan
>
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