Re: [pygtk] push huge array into liststore
Hi,
a solution is written into the FAQ:
http://faq.pygtk.org/index.py?req=show&file=faq13.043.htp
treeview.freeze_child_notify()
treeview.set_model(None)
# Add rows to the model
# ...
treeview.set_model(model)
treeview.thaw_child_notify()
Regards,
Zyphos
Tim Evans a écrit :
> On 2010-07-13 3:48, Cornelius Kölbel wrote:
>
>> Dear list,
>>
>> I got an array of dictionaries, that I want to add to a GTKListStore,
>> that is displayed an a treeview.
>>
>> This is very slow. I already replaced the liststore.append by
>> liststore.insert, which is much much faster.
>> But still, filling the 10.000 values takes about 50 seconds.
>>
>> Is there any cool mapping function, to push the array to the liststore?
>> I used a for loop to iterate over the array...
>> I also tried while an to pop the array elements...
>>
>> It is something like this:
>>
>> data: array of dictionaries
>>
>> data = array( { 'v1' : 'something', 'v2': 'something else' } ,
>>{ 'v1' : 'another', 'v2': 'something completely diff' }
>> )
>>
>>
>> for d in data:
>> self.liststore.insert( 0, ( d.get("v1"), d.get("v2") ))
>>
>>
>> ...is there a better way than doing a for loop?
>> ...or a way to not have to interate over the 10.000 dicts?
>>
>> ...or is there a cool reading on performance tuning pyton?
>>
>
> Some general ideas:
> - Make sure the store isn't being viewed when you insert data, that
> will slow it down.
>
> - Do attribute lookups outside big loops:
>
> append = self.liststore.append
> get = d.get
> for d in data:
> append(0, (get('v1'), get('v2'), ...))
>
> - Put the treeview into fixed height and width mode. Automatic sizing
> is the enemy of treeview performance. This only works if all your
> rows are the same height. The function calls you need are:
> gtk.TreeViewColumn.set_sizing
> with the gtk.TREE_VIEW_COLUMN_FIXED value
> gtk.TreeViewColumn.set_fixed_width
> gtk.TreeView.set_fixed_height_mode
>
> - If your list is large enough it may be worth subclassing
> gtk.TreeModel and overriding the required methods. It's complex, but
> it can avoid referencing all your data at tree build time, instead
> loading as the user scrolls.
>
> - Write it in C. Always valid, even if as a last resort.
>
>
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Re: [pygtk] Drag and drop (DND) of gtk.Notebook tab to another widget [SOLVED]
Because there it seems that there is no source of this on internet, here
is a way to achieve this.
This is a hack, we are going to override the data parameter with the
page number instead of the C pointer to the widget.
===Code.py===
notebook = gtk.notebook()
drag_page_number = 0 # global var
notebook.connect_after("drag_begin", _sig_notebook_drag_begin)
notebook.connect_after("drag_data_get", _sig_notebook_drag_data_get)
# do not use drag_source_set on Notebook, you will get a Segmentation
Fault, use "set_tab_detachable" instead.
# https://bugs.launchpad.net/ubuntu/+source/pygtk/+bug/604534
# notebook.drag_source_set(gtk.gdk.BUTTON1_MASK, [], gtk.gdk.ACTION_COPY)
# add tabs to notebook
notebook.append_page(child_widget, label)
notebook.set_tab_detachable(child_widget, True)
...
def _sig_notebook_drag_begin(widget, context):
# Drag and drop begin, save current page number
drag_page_number = notebook.get_current_page()
def _sig_notebook_drag_data_get(widget, context, selection, info,
timestamp):
# Override the C pointer to the widget with page_number
selection.set(selection.target, 8, str(drag_page_number)) # data is
only of string type !
# The widget that will receive the drag and drop
button = gtk.Button("Test")
button.connect("drag_drop", _sig_drag_drop)
button.connect("drag_data_received", _sig_drag_data_received)
button.drag_dest_set(0, [], 0) # button can receive any drag and drop
def _sig_drag_drop(widget, context, x, y, time):
# widget = button here
if "GTK_NOTEBOOK_TAB" in context.targets:
widget.drag_get_data(context, "GTK_NOTEBOOK_TAB")
context.finish(True, False, time)
return True
def _sig_drag_data_received(widget, context, x, y, selection, info,
timestamp):
# widget = button here
src_widget = context.get_source_widget() # src_widget = notebook here
the_page_number = int(selection.data)
child_widget = src_widget.get_nth_page(the_page_number)
===End of code===
Zyphos
Zyphos a écrit :
> Hi,
> I try to make a DND from a gtk.Notebook to another widget.
> I receive the 'selection' on the other widget.
>
> The documentation say:
> "The notebook will fill the selection with a reference to the child
> widget that corresponds to the dropped tab."
>
> Src:
> http://library.gnome.org/devel/pygtk/stable/class-gtknotebook.html#method-gtknotebook--set-tab-detachable
>
> Here is the selection of this DND ('drag-data-received'):
>
> Selection: SelectionData:
> .data: str: ��
> .format: int: 8
> .selection: str: XdndSelection
> .target: str: GTK_NOTEBOOK_TAB
> .type: str: GTK_NOTEBOOK_TAB
>
> But selection.data is a string with this "str: �� " (I think this is a
> pointer reference to the C code child widget) it isn't usable with Python.
>
> How can I retrieve the notebook child widget which the DND come from ?
>
> Thank you for any suggestion.
>
>
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[pygtk] Drag and drop (DND) of gtk.Notebook tab to another widget
Hi,
I try to make a DND from a gtk.Notebook to another widget.
I receive the 'selection' on the other widget.
The documentation say:
"The notebook will fill the selection with a reference to the child
widget that corresponds to the dropped tab."
Src:
http://library.gnome.org/devel/pygtk/stable/class-gtknotebook.html#method-gtknotebook--set-tab-detachable
Here is the selection of this DND ('drag-data-received'):
Selection: SelectionData:
.data: str: ��
.format: int: 8
.selection: str: XdndSelection
.target: str: GTK_NOTEBOOK_TAB
.type: str: GTK_NOTEBOOK_TAB
But selection.data is a string with this "str: �� " (I think this is a
pointer reference to the C code child widget) it isn't usable with Python.
How can I retrieve the notebook child widget which the DND come from ?
Thank you for any suggestion.
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