GI.Gtk.Objects.ListStore

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

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

The GtkListStore 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 GtkListStore 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 treeModelRowChanged to emit the signalgtk.TreeModel[row_changed] signal. This most commonly affects lists with Textures stored.

An example for creating a simple list store:

c code

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 GtkListStore 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 GtkListStore sets the GTK_TREE_MODEL_ITERS_PERSIST flag, which means that GtkTreeIters 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 listStoreInsertWithValues 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 GtkTreeModel signaling. In contrast, using e.g. listStoreAppend and then gtk_list_store_set() will first create a row, which triggers the GtkTreeModel::row-inserted signal on GtkListStore. 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 GtkListStore inside a GtkTreeModelFilter and are using a GtkTreeModelFilterVisibleFunc. Using any of the non-atomic operations to append rows to the GtkListStore will cause the GtkTreeModelFilterVisibleFunc 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:

xml code

<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>

Exported types

newtype ListStore

Memory-managed wrapper type.

Constructors

ListStore (ManagedPtr ListStore)

Instances

Eq ListStore

Defined in GI.Gtk.Objects.ListStore

Methods

(==) :: ListStore -> ListStore -> Bool

(/=) :: ListStore -> ListStore -> Bool

GObject ListStore

Defined in GI.Gtk.Objects.ListStore

ManagedPtrNewtype ListStore

Defined in GI.Gtk.Objects.ListStore

Methods

toManagedPtr :: ListStore -> ManagedPtr ListStore

TypedObject ListStore

Defined in GI.Gtk.Objects.ListStore

Methods

glibType :: IO GType

HasParentTypes ListStore

Defined in GI.Gtk.Objects.ListStore

IsGValue (Maybe ListStore)

Convert ListStore to and from GValue. See toGValue and fromGValue.

Defined in GI.Gtk.Objects.ListStore

Methods

gvalueGType_ :: IO GType

gvalueSet_ :: Ptr GValue -> Maybe ListStore -> IO ()

gvalueGet_ :: Ptr GValue -> IO (Maybe ListStore)

type ParentTypes ListStore

Defined in GI.Gtk.Objects.ListStore

type ParentTypes ListStore = '[Object, Buildable, TreeDragDest, TreeDragSource, TreeModel, TreeSortable]

class (GObject o, IsDescendantOf ListStore o) => IsListStore o

Type class for types which can be safely cast to ListStore, for instance with toListStore.

Instances

(GObject o, IsDescendantOf ListStore o) => IsListStore o

Defined in GI.Gtk.Objects.ListStore

toListStore :: (MonadIO m, IsListStore o) => o -> m ListStore

Cast to ListStore, for types for which this is known to be safe. For general casts, use castTo.

Methods

Click to display all available methods, including inherited ones

Methods

append, bindProperty, bindPropertyFull, clear, dragDataDelete, dragDataGet, dragDataReceived, filterNew, forceFloating, foreach, freezeNotify, getv, hasDefaultSortFunc, insert, insertAfter, insertBefore, insertWithValues, isFloating, iterChildren, iterHasChild, iterIsValid, iterNChildren, iterNext, iterNthChild, iterParent, iterPrevious, moveAfter, moveBefore, notify, notifyByPspec, prepend, ref, refNode, refSink, remove, reorder, rowChanged, rowDeleted, rowDraggable, rowDropPossible, rowHasChildToggled, rowInserted, rowsReordered, runDispose, set, sortColumnChanged, stealData, stealQdata, swap, thawNotify, unref, unrefNode, watchClosure.

Getters

getBuildableId, getColumnType, getData, getFlags, getIter, getIterFirst, getIterFromString, getNColumns, getPath, getProperty, getQdata, getSortColumnId, getStringFromIter, getValue.

Setters

setColumnTypes, setData, setDataFull, setDefaultSortFunc, setProperty, setSortColumnId, setSortFunc, setValue.

append

listStoreAppend

Arguments

:: (HasCallStack, MonadIO m, IsListStore a)

=> a

listStore: A GtkListStore

-> m TreeIter

Appends a new row to listStore. 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 listStoreSetValue.

clear

listStoreClear

Arguments

:: (HasCallStack, MonadIO m, IsListStore a)

=> a

listStore: a GtkListStore.

-> m ()

Removes all rows from the list store.

insert

listStoreInsert

Arguments

:: (HasCallStack, MonadIO m, IsListStore a)

=> a

listStore: A GtkListStore

-> Int32

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

-> m TreeIter

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 listStoreSetValue.

insertAfter

listStoreInsertAfter

Arguments

:: (HasCallStack, MonadIO m, IsListStore a)

=> a

listStore: A GtkListStore

-> Maybe TreeIter

sibling: A valid GtkTreeIter

-> m TreeIter

Inserts a new row after sibling. If sibling is Nothing, 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 listStoreSetValue.

insertBefore

listStoreInsertBefore

Arguments

:: (HasCallStack, MonadIO m, IsListStore a)

=> a

listStore: A GtkListStore

-> Maybe TreeIter

sibling: A valid GtkTreeIter

-> m TreeIter

Inserts a new row before sibling. If sibling is Nothing, 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 listStoreSetValue.

insertWithValues

listStoreInsertWithValues

Arguments

:: (HasCallStack, MonadIO m, IsListStore a)

=> a

listStore: A GtkListStore

-> Int32

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

-> [Int32]

columns: an array of column numbers

-> [GValue]

values: an array of GValues

-> m TreeIter

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.

iterIsValid

listStoreIterIsValid

Arguments

:: (HasCallStack, MonadIO m, IsListStore a)

=> a

listStore: a list store

-> TreeIter

iter: the iterator to check

-> m Bool

Returns: True if the iter is valid, False if the iter is invalid.

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

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

moveAfter

listStoreMoveAfter

Arguments

:: (HasCallStack, MonadIO m, IsListStore a)

=> a

store: A GtkListStore.

-> TreeIter

iter: A GtkTreeIter

-> Maybe TreeIter

position: A GtkTreeIter

-> m ()

Moves iter in store to the position after position. Note that this function only works with unsorted stores. If position is Nothing, iter will be moved to the start of the list.

moveBefore

listStoreMoveBefore

Arguments

:: (HasCallStack, MonadIO m, IsListStore a)

=> a

store: A GtkListStore.

-> TreeIter

iter: A GtkTreeIter

-> Maybe TreeIter

position: A GtkTreeIter

-> m ()

Moves iter in store to the position before position. Note that this function only works with unsorted stores. If position is Nothing, iter will be moved to the end of the list.

new

listStoreNew

Arguments

:: (HasCallStack, MonadIO m)

=> [GType]

types: an array of GType types for the columns, from first to last

-> m ListStore

Returns: a new GtkListStore

Non-vararg creation function. Used primarily by language bindings.

prepend

listStorePrepend

Arguments

:: (HasCallStack, MonadIO m, IsListStore a)

=> a

listStore: A GtkListStore

-> m TreeIter

Prepends a new row to listStore. 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 listStoreSetValue.

remove

listStoreRemove

Arguments

:: (HasCallStack, MonadIO m, IsListStore a)

=> a

listStore: A GtkListStore

-> TreeIter

iter: A valid GtkTreeIter

-> m Bool

Returns: True if iter is valid, False if not.

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 listStore.

reorder

listStoreReorder

Arguments

:: (HasCallStack, MonadIO m, IsListStore a)

=> a

store: A GtkListStore.

-> [Int32]

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

-> m ()

Reorders store to follow the order indicated by newOrder. Note that this function only works with unsorted stores.

set

listStoreSet

Arguments

:: (HasCallStack, MonadIO m, IsListStore a)

=> a

listStore: A GtkListStore

-> TreeIter

iter: A valid GtkTreeIter for the row being modified

-> [Int32]

columns: an array of column numbers

-> [GValue]

values: an array of GValues

-> m ()

A variant of gtk_list_store_set_valist() which takes the columns and values as two arrays, instead of varargs. This function is mainly intended for language-bindings and in case the number of columns to change is not known until run-time.

setColumnTypes

listStoreSetColumnTypes

Arguments

:: (HasCallStack, MonadIO m, IsListStore a)

=> a

listStore: A GtkListStore

-> [GType]

types: An array length n of GTypes

-> m ()

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

setValue

listStoreSetValue

Arguments

:: (HasCallStack, MonadIO m, IsListStore a)

=> a

listStore: A GtkListStore

-> TreeIter

iter: A valid GtkTreeIter for the row being modified

-> Int32

column: column number to modify

-> GValue

value: new value for the cell

-> m ()

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

swap

listStoreSwap

Arguments

:: (HasCallStack, MonadIO m, IsListStore a)

=> a

store: A GtkListStore.

-> TreeIter

a: A GtkTreeIter

-> TreeIter

b: Another GtkTreeIter

-> m ()

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