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https://gitlab.gnome.org/GNOME/gtk.git
synced 2024-12-30 15:31:34 +00:00
listview: Only allocate necesary rows
This is the big one. The listview only allocates 200 rows around the visible row now. Everything else is kept in ListRow instances with row->widget == NULL. For rows without a widget, we assign the median height of the child widgets as the row's height and then do all calculations as if there were widgets that had requested that height (like setting adjustment values or reacting to adjustment value changes). When the view is scrolled, we bind the 200 rows to the new visible area, so that the part of the listview that can be seen is always allocated.
This commit is contained in:
Benjamin Otte
Matthias Clasen
parent
2ba2a216ca
commit
b64da6d268
@ -29,6 +29,12 @@
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#include "gtkscrollable.h"
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#include "gtkwidgetprivate.h"
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/* Maximum number of list items created by the listview.
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* For debugging, you can set this to G_MAXUINT to ensure
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* there's always a list item for every row.
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*/
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#define GTK_LIST_VIEW_MAX_LIST_ITEMS 200
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/**
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* SECTION:gtklistview
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* @title: GtkListView
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@ -54,21 +60,23 @@ struct _GtkListView
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int list_width;
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/* managing the visible region */
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GtkWidget *anchor;
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int anchor_align;
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GtkWidget *anchor; /* may be NULL if list is empty */
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int anchor_align; /* what to align the anchor to */
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guint anchor_start; /* start of region we allocate row widgets for */
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guint anchor_end; /* end of same region - first position to not have a widget */
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};
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struct _ListRow
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{
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guint n_rows;
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guint height;
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guint height; /* per row */
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GtkWidget *widget;
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};
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struct _ListRowAugment
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{
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guint n_rows;
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guint height;
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guint height; /* total */
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};
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enum
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@ -88,6 +96,28 @@ G_DEFINE_TYPE_WITH_CODE (GtkListView, gtk_list_view, GTK_TYPE_WIDGET,
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static GParamSpec *properties[N_PROPS] = { NULL, };
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static void G_GNUC_UNUSED
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dump (GtkListView *self)
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{
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ListRow *row;
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guint n_widgets, n_list_rows;
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n_widgets = 0;
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n_list_rows = 0;
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g_print ("ANCHOR: %u - %u\n", self->anchor_start, self->anchor_end);
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for (row = gtk_rb_tree_get_first (self->rows);
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row;
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row = gtk_rb_tree_node_get_next (row))
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{
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if (row->widget)
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n_widgets++;
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n_list_rows++;
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g_print (" %4u%s (%upx)\n", row->n_rows, row->widget ? " (widget)" : "", row->height);
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}
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g_print (" => %u widgets in %u list rows\n", n_widgets, n_list_rows);
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}
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static void
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list_row_augment (GtkRbTree *tree,
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gpointer node_augment,
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@ -98,7 +128,7 @@ list_row_augment (GtkRbTree *tree,
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ListRow *row = node;
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ListRowAugment *aug = node_augment;
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aug->height = row->height;
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aug->height = row->height * row->n_rows;
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aug->n_rows = row->n_rows;
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if (left)
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@ -225,9 +255,9 @@ gtk_list_view_get_row_at_y (GtkListView *self,
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y -= aug->height;
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}
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if (y < row->height)
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if (y < row->height * row->n_rows)
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break;
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y -= row->height;
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y -= row->height * row->n_rows;
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row = gtk_rb_tree_node_get_right (row);
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}
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@ -242,15 +272,23 @@ static int
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list_row_get_y (GtkListView *self,
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ListRow *row)
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{
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ListRow *parent;
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int y = 0;
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ListRow *parent, *left;
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int y;
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left = gtk_rb_tree_node_get_left (row);
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if (left)
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{
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ListRowAugment *aug = gtk_rb_tree_get_augment (self->rows, left);
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y = aug->height;
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}
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else
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y = 0;
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y = 0;
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for (parent = gtk_rb_tree_node_get_parent (row);
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parent != NULL;
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parent = gtk_rb_tree_node_get_parent (row))
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{
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ListRow *left = gtk_rb_tree_node_get_left (parent);
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left = gtk_rb_tree_node_get_left (parent);
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if (left != row)
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{
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@ -259,7 +297,7 @@ list_row_get_y (GtkListView *self,
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ListRowAugment *aug = gtk_rb_tree_get_augment (self->rows, left);
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y += aug->height;
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}
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y += parent->height;
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y += parent->height * parent->n_rows;
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}
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row = parent;
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@ -282,25 +320,189 @@ gtk_list_view_get_list_height (GtkListView *self)
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return aug->height;
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}
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static gboolean
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gtk_list_view_merge_list_rows (GtkListView *self,
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ListRow *first,
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ListRow *second)
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{
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if (first->widget || second->widget)
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return FALSE;
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first->n_rows += second->n_rows;
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gtk_rb_tree_node_mark_dirty (first);
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gtk_rb_tree_remove (self->rows, second);
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return TRUE;
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}
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static void
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gtk_list_view_set_anchor (GtkListView *self,
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guint position,
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double align)
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gtk_list_view_release_rows (GtkListView *self)
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{
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ListRow *row, *prev, *next;
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guint i;
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row = gtk_rb_tree_get_first (self->rows);
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i = 0;
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while (i < self->anchor_start)
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{
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if (row->widget)
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{
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gtk_list_item_manager_release_list_item (self->item_manager, NULL, row->widget);
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row->widget = NULL;
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i++;
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prev = gtk_rb_tree_node_get_previous (row);
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if (prev && gtk_list_view_merge_list_rows (self, prev, row))
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row = prev;
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next = gtk_rb_tree_node_get_next (row);
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if (next && next->widget == NULL)
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{
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i += next->n_rows;
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if (!gtk_list_view_merge_list_rows (self, next, row))
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g_assert_not_reached ();
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row = gtk_rb_tree_node_get_next (next);
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}
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else
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{
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row = next;
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}
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}
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else
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{
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i += row->n_rows;
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row = gtk_rb_tree_node_get_next (row);
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}
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}
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row = gtk_list_view_get_row (self, self->anchor_end, NULL);
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if (row == NULL)
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return;
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if (row->widget)
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{
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gtk_list_item_manager_release_list_item (self->item_manager, NULL, row->widget);
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row->widget = NULL;
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prev = gtk_rb_tree_node_get_previous (row);
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if (prev && gtk_list_view_merge_list_rows (self, prev, row))
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row = prev;
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}
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while ((next = gtk_rb_tree_node_get_next (row)))
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{
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if (next->widget)
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{
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gtk_list_item_manager_release_list_item (self->item_manager, NULL, next->widget);
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next->widget = NULL;
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}
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gtk_list_view_merge_list_rows (self, row, next);
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}
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}
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static void
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gtk_list_view_ensure_rows (GtkListView *self,
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GtkListItemManagerChange *change,
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guint update_start)
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{
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ListRow *row, *new_row;
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guint i, offset;
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GtkWidget *insert_before;
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gtk_list_view_release_rows (self);
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row = gtk_list_view_get_row (self, self->anchor_start, &offset);
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if (offset > 0)
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{
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new_row = gtk_rb_tree_insert_before (self->rows, row);
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new_row->n_rows = offset;
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row->n_rows -= offset;
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gtk_rb_tree_node_mark_dirty (row);
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}
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insert_before = gtk_widget_get_first_child (GTK_WIDGET (self));
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for (i = self->anchor_start; i < self->anchor_end; i++)
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{
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if (row->n_rows > 1)
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{
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new_row = gtk_rb_tree_insert_before (self->rows, row);
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new_row->n_rows = 1;
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row->n_rows--;
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gtk_rb_tree_node_mark_dirty (row);
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}
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else
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{
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new_row = row;
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row = gtk_rb_tree_node_get_next (row);
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}
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if (new_row->widget == NULL)
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{
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if (change)
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{
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new_row->widget = gtk_list_item_manager_try_reacquire_list_item (self->item_manager,
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change,
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i,
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insert_before);
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}
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if (new_row->widget == NULL)
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{
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new_row->widget = gtk_list_item_manager_acquire_list_item (self->item_manager,
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i,
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insert_before);
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}
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}
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else
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{
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if (update_start <= i)
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gtk_list_item_manager_update_list_item (self->item_manager, new_row->widget, i);
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insert_before = gtk_widget_get_next_sibling (new_row->widget);
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}
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}
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}
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static void
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gtk_list_view_unset_anchor (GtkListView *self)
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{
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self->anchor = NULL;
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self->anchor_align = 0;
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self->anchor_start = 0;
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self->anchor_end = 0;
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}
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static void
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gtk_list_view_set_anchor (GtkListView *self,
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guint position,
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double align,
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GtkListItemManagerChange *change,
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guint update_start)
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{
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ListRow *row;
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guint items_before, items_after, total_items, n_rows;
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g_assert (align >= 0.0 && align <= 1.0);
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row = gtk_list_view_get_row (self, position, NULL);
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if (row == NULL)
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if (self->model)
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n_rows = g_list_model_get_n_items (self->model);
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else
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n_rows = 0;
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if (n_rows == 0)
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{
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/* like, if the list is empty */
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self->anchor = NULL;
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self->anchor_align = 0.0;
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gtk_list_view_unset_anchor (self);
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return;
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}
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total_items = MIN (GTK_LIST_VIEW_MAX_LIST_ITEMS, n_rows);
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if (align < 0.5)
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items_before = ceil (total_items * align);
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else
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items_before = floor (total_items * align);
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items_after = total_items - items_before;
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self->anchor_start = CLAMP (position, items_before, n_rows - items_after) - items_before;
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self->anchor_end = self->anchor_start + total_items;
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g_assert (self->anchor_end <= n_rows);
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gtk_list_view_ensure_rows (self, change, update_start);
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row = gtk_list_view_get_row (self, position, NULL);
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self->anchor = row->widget;
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g_assert (self->anchor);
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self->anchor_align = align;
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gtk_widget_queue_allocate (GTK_WIDGET (self));
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@ -318,11 +520,13 @@ gtk_list_view_adjustment_value_changed_cb (GtkAdjustment *adjustment,
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row = gtk_list_view_get_row_at_y (self, gtk_adjustment_get_value (adjustment), &dy);
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if (row)
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pos = list_row_get_position (self, row);
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{
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pos = list_row_get_position (self, row) + dy / row->height;
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}
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else
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pos = 0;
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gtk_list_view_set_anchor (self, pos, 0);
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gtk_list_view_set_anchor (self, pos, 0, NULL, (guint) -1);
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}
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else
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{
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@ -379,6 +583,112 @@ gtk_list_view_update_adjustments (GtkListView *self,
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self);
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}
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static int
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compare_ints (gconstpointer first,
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gconstpointer second)
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{
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return *(int *) first - *(int *) second;
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}
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static guint
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gtk_list_view_get_unknown_row_height (GtkListView *self,
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GArray *heights)
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{
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g_return_val_if_fail (heights->len > 0, 0);
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/* return the median and hope rows are generally uniform with few outliers */
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g_array_sort (heights, compare_ints);
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return g_array_index (heights, int, heights->len / 2);
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}
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static void
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gtk_list_view_measure_across (GtkWidget *widget,
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GtkOrientation orientation,
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int for_size,
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int *minimum,
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int *natural)
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{
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GtkListView *self = GTK_LIST_VIEW (widget);
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ListRow *row;
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int min, nat, child_min, child_nat;
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/* XXX: Figure out how to split a given height into per-row heights.
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* Good luck! */
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for_size = -1;
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min = 0;
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nat = 0;
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for (row = gtk_rb_tree_get_first (self->rows);
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row != NULL;
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row = gtk_rb_tree_node_get_next (row))
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{
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/* ignore unavailable rows */
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if (row->widget == NULL)
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continue;
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gtk_widget_measure (row->widget,
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orientation, for_size,
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&child_min, &child_nat, NULL, NULL);
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min = MAX (min, child_min);
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nat = MAX (nat, child_nat);
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}
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*minimum = min;
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*natural = nat;
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}
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static void
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gtk_list_view_measure_list (GtkWidget *widget,
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GtkOrientation orientation,
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int for_size,
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int *minimum,
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int *natural)
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{
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GtkListView *self = GTK_LIST_VIEW (widget);
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ListRow *row;
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int min, nat, child_min, child_nat;
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GArray *min_heights, *nat_heights;
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guint n_unknown;
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min_heights = g_array_new (FALSE, FALSE, sizeof (int));
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nat_heights = g_array_new (FALSE, FALSE, sizeof (int));
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n_unknown = 0;
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min = 0;
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nat = 0;
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for (row = gtk_rb_tree_get_first (self->rows);
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row != NULL;
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row = gtk_rb_tree_node_get_next (row))
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{
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if (row->widget)
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{
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gtk_widget_measure (row->widget,
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orientation, for_size,
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&child_min, &child_nat, NULL, NULL);
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g_array_append_val (min_heights, child_min);
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g_array_append_val (nat_heights, child_nat);
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min += child_min;
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nat += child_nat;
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}
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else
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{
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n_unknown += row->n_rows;
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}
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}
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if (n_unknown)
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{
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min += n_unknown * gtk_list_view_get_unknown_row_height (self, min_heights);
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nat += n_unknown * gtk_list_view_get_unknown_row_height (self, nat_heights);
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}
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g_array_free (min_heights, TRUE);
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g_array_free (nat_heights, TRUE);
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*minimum = min;
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*natural = nat;
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}
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static void
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gtk_list_view_measure (GtkWidget *widget,
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GtkOrientation orientation,
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@ -388,39 +698,10 @@ gtk_list_view_measure (GtkWidget *widget,
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int *minimum_baseline,
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int *natural_baseline)
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{
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GtkListView *self = GTK_LIST_VIEW (widget);
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ListRow *row;
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int min, nat, child_min, child_nat;
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/* XXX: Figure out how to split a given height into per-row heights.
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* Good luck! */
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if (orientation == GTK_ORIENTATION_HORIZONTAL)
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for_size = -1;
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min = 0;
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nat = 0;
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for (row = gtk_rb_tree_get_first (self->rows);
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row != NULL;
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row = gtk_rb_tree_node_get_next (row))
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{
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gtk_widget_measure (row->widget,
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orientation, for_size,
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&child_min, &child_nat, NULL, NULL);
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if (orientation == GTK_ORIENTATION_HORIZONTAL)
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{
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min = MAX (min, child_min);
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nat = MAX (nat, child_nat);
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}
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else
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{
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min += child_nat;
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nat = min;
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}
|
||||
}
|
||||
|
||||
*minimum = min;
|
||||
*natural = nat;
|
||||
gtk_list_view_measure_across (widget, orientation, for_size, minimum, natural);
|
||||
else
|
||||
gtk_list_view_measure_list (widget, orientation, for_size, minimum, natural);
|
||||
}
|
||||
|
||||
static void
|
||||
@ -432,8 +713,13 @@ gtk_list_view_size_allocate (GtkWidget *widget,
|
||||
GtkListView *self = GTK_LIST_VIEW (widget);
|
||||
GtkAllocation child_allocation = { 0, 0, 0, 0 };
|
||||
ListRow *row;
|
||||
GArray *heights;
|
||||
int min, nat, row_height;
|
||||
|
||||
/* step 0: exit early if list is empty */
|
||||
if (gtk_rb_tree_get_root (self->rows) == NULL)
|
||||
return;
|
||||
|
||||
/* step 1: determine width of the list */
|
||||
gtk_widget_measure (widget, GTK_ORIENTATION_HORIZONTAL,
|
||||
-1,
|
||||
@ -443,11 +729,16 @@ gtk_list_view_size_allocate (GtkWidget *widget,
|
||||
else
|
||||
self->list_width = MAX (nat, width);
|
||||
|
||||
/* step 2: determine height of list */
|
||||
/* step 2: determine height of known list items */
|
||||
heights = g_array_new (FALSE, FALSE, sizeof (int));
|
||||
|
||||
for (row = gtk_rb_tree_get_first (self->rows);
|
||||
row != NULL;
|
||||
row = gtk_rb_tree_node_get_next (row))
|
||||
{
|
||||
if (row->widget == NULL)
|
||||
continue;
|
||||
|
||||
gtk_widget_measure (row->widget, GTK_ORIENTATION_VERTICAL,
|
||||
self->list_width,
|
||||
&min, &nat, NULL, NULL);
|
||||
@ -460,6 +751,25 @@ gtk_list_view_size_allocate (GtkWidget *widget,
|
||||
row->height = row_height;
|
||||
gtk_rb_tree_node_mark_dirty (row);
|
||||
}
|
||||
g_array_append_val (heights, row_height);
|
||||
}
|
||||
|
||||
/* step 3: determine height of unknown items */
|
||||
row_height = gtk_list_view_get_unknown_row_height (self, heights);
|
||||
g_array_free (heights, TRUE);
|
||||
|
||||
for (row = gtk_rb_tree_get_first (self->rows);
|
||||
row != NULL;
|
||||
row = gtk_rb_tree_node_get_next (row))
|
||||
{
|
||||
if (row->widget)
|
||||
continue;
|
||||
|
||||
if (row->height != row_height)
|
||||
{
|
||||
row->height = row_height;
|
||||
gtk_rb_tree_node_mark_dirty (row);
|
||||
}
|
||||
}
|
||||
|
||||
/* step 3: update the adjustments */
|
||||
@ -474,9 +784,13 @@ gtk_list_view_size_allocate (GtkWidget *widget,
|
||||
row != NULL;
|
||||
row = gtk_rb_tree_node_get_next (row))
|
||||
{
|
||||
child_allocation.height = row->height;
|
||||
gtk_widget_size_allocate (row->widget, &child_allocation, -1);
|
||||
child_allocation.y += child_allocation.height;
|
||||
if (row->widget)
|
||||
{
|
||||
child_allocation.height = row->height;
|
||||
gtk_widget_size_allocate (row->widget, &child_allocation, -1);
|
||||
}
|
||||
|
||||
child_allocation.y += row->height * row->n_rows;
|
||||
}
|
||||
}
|
||||
|
||||
@ -504,79 +818,56 @@ gtk_list_view_remove_rows (GtkListView *self,
|
||||
guint n_rows)
|
||||
{
|
||||
ListRow *row;
|
||||
guint i;
|
||||
|
||||
if (n_rows == 0)
|
||||
return;
|
||||
|
||||
row = gtk_list_view_get_row (self, position, NULL);
|
||||
|
||||
for (i = 0; i < n_rows; i++)
|
||||
while (n_rows > 0)
|
||||
{
|
||||
ListRow *next = gtk_rb_tree_node_get_next (row);
|
||||
gtk_list_item_manager_release_list_item (self->item_manager, change, row->widget);
|
||||
row->widget = NULL;
|
||||
gtk_rb_tree_remove (self->rows, row);
|
||||
row = next;
|
||||
if (row->n_rows > n_rows)
|
||||
{
|
||||
row->n_rows -= n_rows;
|
||||
gtk_rb_tree_node_mark_dirty (row);
|
||||
n_rows = 0;
|
||||
}
|
||||
else
|
||||
{
|
||||
ListRow *next = gtk_rb_tree_node_get_next (row);
|
||||
if (row->widget)
|
||||
gtk_list_item_manager_release_list_item (self->item_manager, change, row->widget);
|
||||
row->widget = NULL;
|
||||
n_rows -= row->n_rows;
|
||||
gtk_rb_tree_remove (self->rows, row);
|
||||
row = next;
|
||||
}
|
||||
}
|
||||
|
||||
gtk_widget_queue_resize (GTK_WIDGET (self));
|
||||
}
|
||||
|
||||
static void
|
||||
gtk_list_view_add_rows (GtkListView *self,
|
||||
GtkListItemManagerChange *change,
|
||||
guint position,
|
||||
guint n_rows)
|
||||
gtk_list_view_add_rows (GtkListView *self,
|
||||
guint position,
|
||||
guint n_rows)
|
||||
{
|
||||
ListRow *row;
|
||||
guint i;
|
||||
guint offset;
|
||||
|
||||
if (n_rows == 0)
|
||||
return;
|
||||
|
||||
row = gtk_list_view_get_row (self, position, NULL);
|
||||
row = gtk_list_view_get_row (self, position, &offset);
|
||||
|
||||
for (i = 0; i < n_rows; i++)
|
||||
{
|
||||
ListRow *new_row;
|
||||
|
||||
new_row = gtk_rb_tree_insert_before (self->rows, row);
|
||||
new_row->n_rows = 1;
|
||||
if (change)
|
||||
{
|
||||
new_row->widget = gtk_list_item_manager_try_reacquire_list_item (self->item_manager,
|
||||
change,
|
||||
position + i,
|
||||
row ? row->widget : NULL);
|
||||
}
|
||||
if (new_row->widget == NULL)
|
||||
{
|
||||
new_row->widget = gtk_list_item_manager_acquire_list_item (self->item_manager,
|
||||
position + i,
|
||||
row ? row->widget : NULL);
|
||||
}
|
||||
}
|
||||
if (row == NULL || row->widget)
|
||||
row = gtk_rb_tree_insert_before (self->rows, row);
|
||||
row->n_rows += n_rows;
|
||||
gtk_rb_tree_node_mark_dirty (row);
|
||||
|
||||
gtk_widget_queue_resize (GTK_WIDGET (self));
|
||||
}
|
||||
|
||||
static void
|
||||
gtk_list_view_update_rows (GtkListView *self,
|
||||
guint position)
|
||||
{
|
||||
ListRow *row;
|
||||
|
||||
for (row = gtk_list_view_get_row (self, position, NULL);
|
||||
row;
|
||||
row = gtk_rb_tree_node_get_next (row))
|
||||
{
|
||||
gtk_list_item_manager_update_list_item (self->item_manager, row->widget, position);
|
||||
|
||||
position++;
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
gtk_list_view_model_items_changed_cb (GListModel *model,
|
||||
guint position,
|
||||
@ -589,17 +880,100 @@ gtk_list_view_model_items_changed_cb (GListModel *model,
|
||||
change = gtk_list_item_manager_begin_change (self->item_manager);
|
||||
|
||||
gtk_list_view_remove_rows (self, change, position, removed);
|
||||
gtk_list_view_add_rows (self, change, position, added);
|
||||
if (removed != added)
|
||||
gtk_list_view_update_rows (self, position + added);
|
||||
gtk_list_view_add_rows (self, position, added);
|
||||
|
||||
if (gtk_list_item_manager_change_contains (change, self->anchor))
|
||||
/* The anchor was removed, but it may just have moved to a different position */
|
||||
if (self->anchor && gtk_list_item_manager_change_contains (change, self->anchor))
|
||||
{
|
||||
guint anchor_pos = gtk_list_item_get_position (GTK_LIST_ITEM (self->anchor));
|
||||
/* The anchor was removed, do a more expensive rebuild trying to find if
|
||||
* the anchor maybe got readded somewhere else */
|
||||
ListRow *row, *new_row;
|
||||
GtkWidget *insert_before;
|
||||
guint i, offset, anchor_pos;
|
||||
|
||||
/* removed cannot be NULL or the anchor wouldn't have been removed */
|
||||
anchor_pos = position + (anchor_pos - position) * added / removed;
|
||||
gtk_list_view_set_anchor (self, anchor_pos, self->anchor_align);
|
||||
row = gtk_list_view_get_row (self, position, &offset);
|
||||
for (new_row = row;
|
||||
new_row && new_row->widget == NULL;
|
||||
new_row = gtk_rb_tree_node_get_next (new_row))
|
||||
;
|
||||
if (new_row)
|
||||
insert_before = new_row->widget;
|
||||
else
|
||||
insert_before = NULL; /* we're at the end */
|
||||
|
||||
for (i = 0; i < added; i++)
|
||||
{
|
||||
GtkWidget *widget;
|
||||
|
||||
widget = gtk_list_item_manager_try_reacquire_list_item (self->item_manager,
|
||||
change,
|
||||
position + i,
|
||||
insert_before);
|
||||
if (widget == NULL)
|
||||
{
|
||||
offset++;
|
||||
continue;
|
||||
}
|
||||
|
||||
if (offset > 0)
|
||||
{
|
||||
new_row = gtk_rb_tree_insert_before (self->rows, row);
|
||||
new_row->n_rows = offset;
|
||||
row->n_rows -= offset;
|
||||
offset = 0;
|
||||
gtk_rb_tree_node_mark_dirty (row);
|
||||
}
|
||||
|
||||
if (row->n_rows == 1)
|
||||
{
|
||||
new_row = row;
|
||||
row = gtk_rb_tree_node_get_next (row);
|
||||
}
|
||||
else
|
||||
{
|
||||
new_row = gtk_rb_tree_insert_before (self->rows, row);
|
||||
new_row->n_rows = 1;
|
||||
row->n_rows--;
|
||||
gtk_rb_tree_node_mark_dirty (row);
|
||||
}
|
||||
|
||||
new_row->widget = widget;
|
||||
if (widget == self->anchor)
|
||||
{
|
||||
anchor_pos = position + i;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (i == added)
|
||||
{
|
||||
/* The anchor wasn't readded. Guess a good anchor position */
|
||||
anchor_pos = gtk_list_item_get_position (GTK_LIST_ITEM (self->anchor));
|
||||
|
||||
anchor_pos = position + (anchor_pos - position) * added / removed;
|
||||
}
|
||||
gtk_list_view_set_anchor (self, anchor_pos, self->anchor_align, change, position);
|
||||
}
|
||||
else
|
||||
{
|
||||
/* The anchor is still where it was.
|
||||
* We just may need to update its position and check that its surrounding widgets
|
||||
* exist (they might be new ones). */
|
||||
guint anchor_pos;
|
||||
|
||||
if (self->anchor)
|
||||
{
|
||||
anchor_pos = gtk_list_item_get_position (GTK_LIST_ITEM (self->anchor));
|
||||
|
||||
if (anchor_pos >= position)
|
||||
anchor_pos += added - removed;
|
||||
}
|
||||
else
|
||||
{
|
||||
anchor_pos = 0;
|
||||
}
|
||||
|
||||
gtk_list_view_set_anchor (self, anchor_pos, self->anchor_align, change, position);
|
||||
}
|
||||
|
||||
gtk_list_item_manager_end_change (self->item_manager, change);
|
||||
@ -617,6 +991,8 @@ gtk_list_view_clear_model (GtkListView *self)
|
||||
gtk_list_view_model_items_changed_cb,
|
||||
self);
|
||||
g_clear_object (&self->model);
|
||||
|
||||
gtk_list_view_unset_anchor (self);
|
||||
}
|
||||
|
||||
static void
|
||||
@ -897,8 +1273,8 @@ gtk_list_view_set_model (GtkListView *self,
|
||||
G_CALLBACK (gtk_list_view_model_items_changed_cb),
|
||||
self);
|
||||
|
||||
gtk_list_view_add_rows (self, NULL, 0, g_list_model_get_n_items (model));
|
||||
gtk_list_view_set_anchor (self, 0, 0);
|
||||
gtk_list_view_add_rows (self, 0, g_list_model_get_n_items (model));
|
||||
gtk_list_view_set_anchor (self, 0, 0, NULL, (guint) -1);
|
||||
}
|
||||
|
||||
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_MODEL]);
|
||||
@ -927,7 +1303,7 @@ gtk_list_view_set_functions (GtkListView *self,
|
||||
gtk_list_item_manager_set_factory (self->item_manager, factory);
|
||||
g_object_unref (factory);
|
||||
|
||||
gtk_list_view_add_rows (self, NULL, 0, n_items);
|
||||
gtk_list_view_set_anchor (self, anchor, anchor_align);
|
||||
gtk_list_view_add_rows (self, 0, n_items);
|
||||
gtk_list_view_set_anchor (self, anchor, anchor_align, NULL, (guint) -1);
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user