Struct gtk4::SortListModel[][src]

pub struct SortListModel(_);
Expand description

SortListModel is a list model that sorts the elements of the underlying model according to a Sorter.

The model can be set up to do incremental sorting, so that sorting long lists doesn’t block the UI. See set_incremental() for details.

SortListModel is a generic model and because of that it cannot take advantage of any external knowledge when sorting. If you run into performance issues with SortListModel, it is strongly recommended that you write your own sorting list model.

Implements

glib::ObjectExt, gio::prelude::ListModelExt

Implementations

Creates a new sort list model that uses the sorter to sort model.

model

the model to sort, or None

sorter

the Sorter to sort model with, or None

Returns

a new SortListModel

Creates a new builder-pattern struct instance to construct SortListModel objects.

This method returns an instance of SortListModelBuilder which can be used to create SortListModel objects.

Returns whether incremental sorting is enabled.

See set_incremental().

Returns

true if incremental sorting is enabled

Gets the model currently sorted or None if none.

Returns

The model that gets sorted

Estimates progress of an ongoing sorting operation.

The estimate is the number of items that would still need to be sorted to finish the sorting operation if this was a linear algorithm. So this number is not related to how many items are already correctly sorted.

If you want to estimate the progress, you can use code like this: ⚠️ The following code is in c ⚠️

pending = gtk_sort_list_model_get_pending (self);
model = gtk_sort_list_model_get_model (self);
progress = 1.0 - pending / (double) MAX (1, g_list_model_get_n_items (model));

If no sort operation is ongoing - in particular when property::SortListModel::incremental is false - this function returns 0.

Returns

a progress estimate of remaining items to sort

Gets the sorter that is used to sort self.

Returns

the sorter of self

Sets the sort model to do an incremental sort.

When incremental sorting is enabled, the SortListModel will not do a complete sort immediately, but will instead queue an idle handler that incrementally sorts the items towards their correct position. This of course means that items do not instantly appear in the right place. It also means that the total sorting time is a lot slower.

When your filter blocks the UI while sorting, you might consider turning this on. Depending on your model and sorters, this may become interesting around 10,000 to 100,000 items.

By default, incremental sorting is disabled.

See pending() for progress information about an ongoing incremental sorting operation.

incremental

true to sort incrementally

Sets the model to be sorted.

The model’s item type must conform to the item type of self.

model

The model to be sorted

Sets a new sorter on self.

sorter

the Sorter to sort model with

Trait Implementations

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