#[repr(transparent)]
pub struct ListStore { /* private fields */ }
Expand description

A list-like data structure that can be used with the TreeView.

The ListStore object is a list model for use with a TreeView widget. It implements the TreeModel interface, and consequentialy, can use all of the methods available there. It also implements the TreeSortable interface so it can be sorted by the view. Finally, it also implements the tree drag and drop interfaces.

The ListStore can accept most GTypes as a column type, though it can’t accept all custom types. Internally, it will keep a copy of data passed in (such as a string or a boxed pointer). Columns that accept GObjects are handled a little differently. The ListStore will keep a reference to the object instead of copying the value. As a result, if the object is modified, it is up to the application writer to call TreeModelExt::row_changed() to emit the signal::TreeModel::row_changed signal. This most commonly affects lists with gdk::Textures stored.

An example for creating a simple list store:

⚠️ The following code is in c ⚠️

enum {
  COLUMN_STRING,
  COLUMN_INT,
  COLUMN_BOOLEAN,
  N_COLUMNS
};

{
  GtkListStore *list_store;
  GtkTreePath *path;
  GtkTreeIter iter;
  int i;

  list_store = gtk_list_store_new (N_COLUMNS,
                                   G_TYPE_STRING,
                                   G_TYPE_INT,
                                   G_TYPE_BOOLEAN);

  for (i = 0; i < 10; i++)
    {
      char *some_data;

      some_data = get_some_data (i);

      // Add a new row to the model
      gtk_list_store_append (list_store, &iter);
      gtk_list_store_set (list_store, &iter,
                          COLUMN_STRING, some_data,
                          COLUMN_INT, i,
                          COLUMN_BOOLEAN,  FALSE,
                          -1);

      // As the store will keep a copy of the string internally,
      // we free some_data.
      g_free (some_data);
    }

  // Modify a particular row
  path = gtk_tree_path_new_from_string ("4");
  gtk_tree_model_get_iter (GTK_TREE_MODEL (list_store),
                           &iter,
                           path);
  gtk_tree_path_free (path);
  gtk_list_store_set (list_store, &iter,
                      COLUMN_BOOLEAN, TRUE,
                      -1);
}

Performance Considerations

Internally, the ListStore was originally implemented with a linked list with a tail pointer. As a result, it was fast at data insertion and deletion, and not fast at random data access. The ListStore sets the GTK_TREE_MODEL_ITERS_PERSIST flag, which means that TreeIters can be cached while the row exists. Thus, if access to a particular row is needed often and your code is expected to run on older versions of GTK, it is worth keeping the iter around.

Atomic Operations

It is important to note that only the methods gtk_list_store_insert_with_values() and gtk_list_store_insert_with_valuesv() are atomic, in the sense that the row is being appended to the store and the values filled in in a single operation with regard to TreeModel signaling. In contrast, using e.g. gtk_list_store_append() and then gtk_list_store_set() will first create a row, which triggers the GtkTreeModel::row-inserted signal on ListStore. The row, however, is still empty, and any signal handler connecting to GtkTreeModel::row-inserted on this particular store should be prepared for the situation that the row might be empty. This is especially important if you are wrapping the ListStore inside a TreeModelFilter and are using a TreeModelFilterVisibleFunc. Using any of the non-atomic operations to append rows to the ListStore will cause the TreeModelFilterVisibleFunc to be visited with an empty row first; the function must be prepared for that.

GtkListStore as GtkBuildable

The GtkListStore implementation of the Buildable interface allows to specify the model columns with a <columns> element that may contain multiple <column> elements, each specifying one model column. The “type” attribute specifies the data type for the column.

Additionally, it is possible to specify content for the list store in the UI definition, with the <data> element. It can contain multiple <row> elements, each specifying to content for one row of the list model. Inside a <row>, the <col> elements specify the content for individual cells.

Note that it is probably more common to define your models in the code, and one might consider it a layering violation to specify the content of a list store in a UI definition, data, not presentation, and common wisdom is to separate the two, as far as possible.

An example of a UI Definition fragment for a list store:

<object class="GtkListStore">
  <columns>
    <column type="gchararray"/>
    <column type="gchararray"/>
    <column type="gint"/>
  </columns>
  <data>
    <row>
      <col id="0">John</col>
      <col id="1">Doe</col>
      <col id="2">25</col>
    </row>
    <row>
      <col id="0">Johan</col>
      <col id="1">Dahlin</col>
      <col id="2">50</col>
    </row>
  </data>
</object>

Implements

glib::ObjectExt, BuildableExt, TreeDragDestExt, TreeDragSourceExt, TreeModelExt, TreeSortableExt, TreeModelExtManual, TreeSortableExtManual

Implementations

Appends a new row to @self. @iter will be changed to point to this new row. The row will be empty after this function is called. To fill in values, you need to call gtk_list_store_set() or gtk_list_store_set_value().

Returns
iter

An unset TreeIter to set to the appended row

Removes all rows from the list store.

Creates a new row at @position. @iter will be changed to point to this new row. If @position is -1 or is larger than the number of rows on the list, then the new row will be appended to the list. The row will be empty after this function is called. To fill in values, you need to call gtk_list_store_set() or gtk_list_store_set_value().

position

position to insert the new row, or -1 for last

Returns
iter

An unset TreeIter to set to the new row

Inserts a new row after @sibling. If @sibling is None, then the row will be prepended to the beginning of the list. @iter will be changed to point to this new row. The row will be empty after this function is called. To fill in values, you need to call gtk_list_store_set() or gtk_list_store_set_value().

sibling

A valid TreeIter

Returns
iter

An unset TreeIter to set to the new row

Inserts a new row before @sibling. If @sibling is None, then the row will be appended to the end of the list. @iter will be changed to point to this new row. The row will be empty after this function is called. To fill in values, you need to call gtk_list_store_set() or gtk_list_store_set_value().

sibling

A valid TreeIter

Returns
iter

An unset TreeIter to set to the new row

Checks if the given iter is a valid iter for this ListStore.

This function is slow. Only use it for debugging and/or testing purposes.

iter

the iterator to check

Returns

true if the iter is valid, false if the iter is invalid.

Moves @iter in @self to the position after @position. Note that this function only works with unsorted stores. If @position is None, @iter will be moved to the start of the list.

iter

A TreeIter

position

A TreeIter

Moves @iter in @self to the position before @position. Note that this function only works with unsorted stores. If @position is None, @iter will be moved to the end of the list.

iter

A TreeIter

position

A TreeIter

Prepends a new row to @self. @iter will be changed to point to this new row. The row will be empty after this function is called. To fill in values, you need to call gtk_list_store_set() or gtk_list_store_set_value().

Returns
iter

An unset TreeIter to set to the prepend row

Removes the given row from the list store. After being removed, @iter is set to be the next valid row, or invalidated if it pointed to the last row in @self.

iter

A valid TreeIter

Returns

true if @iter is valid, false if not.

Swaps @a and @b in @self. Note that this function only works with unsorted stores.

a

A TreeIter

b

Another TreeIter

Creates a new list store as with @n_columns columns each of the types passed in. Note that only types derived from standard GObject fundamental types are supported.

As an example, gtk_list_store_new (3, G_TYPE_INT, G_TYPE_STRING, GDK_TYPE_TEXTURE); will create a new ListStore with three columns, of type int, string and gdk::Texture, respectively.

Returns

a new ListStore

A variant of gtk_list_store_insert_with_values() which takes the columns and values as two arrays, instead of varargs.

This function is mainly intended for language-bindings.

position

position to insert the new row, or -1 for last

columns

an array of column numbers

values

an array of GValues

Returns
iter

An unset TreeIter to set to the new row

Reorders @self to follow the order indicated by @new_order. Note that this function only works with unsorted stores.

new_order

an array of integers mapping the new position of each child to its old position before the re-ordering, i.e. @new_order[newpos] = oldpos. It must have exactly as many items as the list store’s length.

Sets the value of one or more cells in the row referenced by @iter. The variable argument list should contain integer column numbers, each column number followed by the value to be set. The list is terminated by a -1. For example, to set column 0 with type G_TYPE_STRING to “Foo”, you would write gtk_list_store_set (store, iter, 0, "Foo", -1).

The value will be referenced by the store if it is a G_TYPE_OBJECT, and it will be copied if it is a G_TYPE_STRING or G_TYPE_BOXED.

iter

row iterator

This function is meant primarily for GObjects that inherit from ListStore, and should only be used when constructing a new ListStore. It will not function after a row has been added, or a method on the TreeModel interface is called.

types

An array length n of GTypes

Sets the data in the cell specified by @iter and @column. The type of @value must be convertible to the type of the column.

iter

A valid TreeIter for the row being modified

column

column number to modify

value

new value for the cell

Trait Implementations

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Formats the value using the given formatter. Read more

Formats the value using the given formatter. Read more

Feeds this value into the given Hasher. Read more

Feeds a slice of this type into the given Hasher. Read more

This method returns an Ordering between self and other. Read more

Compares and returns the maximum of two values. Read more

Compares and returns the minimum of two values. Read more

Restrict a value to a certain interval. Read more

This method tests for self and other values to be equal, and is used by ==. Read more

This method tests for !=.

This method returns an ordering between self and other values if one exists. Read more

This method tests less than (for self and other) and is used by the < operator. Read more

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more

This method tests greater than (for self and other) and is used by the > operator. Read more

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more

Returns the type identifier of Self.

Auto Trait Implementations

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Gets the TypeId of self. Read more

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Upcasts an object to a superclass or interface T. Read more

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Tries to cast to an object of type T. This handles upcasting, downcasting and casting between interface and interface implementors. All checks are performed at runtime, while downcast and upcast will do many checks at compile-time already. Read more

Tries to cast to reference to an object of type T. This handles upcasting, downcasting and casting between interface and interface implementors. All checks are performed at runtime, while downcast and upcast will do many checks at compile-time already. Read more

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Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

Returns true if the object is an instance of (can be cast to) T.

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Returns the ObjectClass of the object. Read more

Returns the class of the object.

Returns the class of the object in the given type T. Read more

Returns the interface T of the object. Read more

Similar to Self::set_property but fails instead of panicking.

Sets the property property_name of the object to value value. Read more

Similar to Self::set_property but fails instead of panicking.

Sets the property property_name of the object to value value. Read more

Similar to Self::set_properties but fails instead of panicking.

Sets multiple properties of the object at once. Read more

Similar to Self::set_properties_from_value but fails instead of panicking.

Sets multiple properties of the object at once. Read more

Similar to Self::property but fails instead of panicking.

Gets the property property_name of the object and cast it to the type V. Read more

Similar to Self::property_value but fails instead of panicking.

Gets the property property_name of the object. Read more

Check if the object has a property property_name of the given type_. Read more

Get the type of the property property_name of this object. Read more

Get the ParamSpec of the property property_name of this object.

Return all ParamSpec of the properties of this object.

Freeze all property notifications until the return guard object is dropped. Read more

Set arbitrary data on this object with the given key. Read more

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Retrieve previously set arbitrary data of this object with the given key. Read more

Set arbitrary data on this object with the given key. Read more

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Retrieve previously set arbitrary data of this object with the given key. Read more

Block a given signal handler. Read more

Unblock a given signal handler.

Stop emission of the currently emitted signal.

Stop emission of the currently emitted signal by the (possibly detailed) signal name.

Similar to Self::connect but fails instead of panicking.

Connect to the signal signal_name on this object. Read more

Similar to Self::connect_id but fails instead of panicking.

Connect to the signal signal_id on this object. Read more

Similar to Self::connect_local but fails instead of panicking.

Connect to the signal signal_name on this object. Read more

Similar to Self::connect_local_id but fails instead of panicking.

Connect to the signal signal_id on this object. Read more

Similar to Self::connect_unsafe but fails instead of panicking.

Connect to the signal signal_name on this object. Read more

Similar to Self::connect_unsafe_id but fails instead of panicking.

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Connect a closure to the signal signal_name on this object. Read more

Similar to Self::connect_closure_id but fails instead of panicking.

Connect a closure to the signal signal_id on this object. Read more

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Connect to the signal signal_id on this object. Read more

Similar to Self::emit but fails instead of panicking.

Emit signal by signal id. Read more

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Emit signal by its name. Read more

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Emit signal by signal id with details. Read more

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Notify that the given property has changed its value. Read more

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The resulting type after obtaining ownership.

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Performs the conversion.

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Performs the conversion.