Commit caacce6d authored by Alexander Larsson's avatar Alexander Larsson

GtkListBox: Add placeholder widget support

parent b0b746b2
......@@ -54,6 +54,8 @@ struct _GtkListBoxPrivate
GSequence *children;
GHashTable *header_hash;
GtkWidget *placeholder;
GtkListBoxSortFunc sort_func;
gpointer sort_func_target;
GDestroyNotify sort_func_target_destroy_notify;
......@@ -557,6 +559,39 @@ gtk_list_box_select_row (GtkListBox *list_box, GtkListBoxRow *row)
gtk_list_box_update_selected (list_box, row);
}
/**
* gtk_list_box_set_placeholder:
* @list_box: a #GtkListBox
* @placeholder: (allow-none): a #GtkWidget or %NULL
*
* Sets the placeholder widget that is shown in the list when
* it doesn't display any visible children.
*
* Since: 3.10
*/
void
gtk_list_box_set_placeholder (GtkListBox *list_box, GtkWidget *placeholder)
{
GtkListBoxPrivate *priv = list_box->priv;
if (priv->placeholder)
{
gtk_widget_unparent (priv->placeholder);
gtk_widget_queue_resize (GTK_WIDGET (list_box));
}
priv->placeholder = placeholder;
if (placeholder)
{
gtk_widget_set_parent (GTK_WIDGET (placeholder), GTK_WIDGET (list_box));
gtk_widget_set_child_visible (GTK_WIDGET (placeholder),
priv->n_visible_rows == 0);
}
}
/**
* gtk_list_box_set_adjustment:
* @list_box: a #GtkListBox
......@@ -1315,12 +1350,26 @@ gtk_list_box_real_realize (GtkWidget* widget)
gtk_widget_set_window (GTK_WIDGET (list_box), window); /* Passes ownership */
}
static void
list_box_add_visible_rows (GtkListBox *list_box, int n)
{
GtkListBoxPrivate *priv = list_box->priv;
int was_zero;
was_zero = priv->n_visible_rows == 0;
priv->n_visible_rows += n;
if (priv->placeholder &&
(was_zero || priv->n_visible_rows == 0))
gtk_widget_set_child_visible (GTK_WIDGET (priv->placeholder),
priv->n_visible_rows == 0);
}
/* Children are visible if they are shown by the app (visible)
and not filtered out (child_visible) by the listbox */
static void
update_row_is_visible (GtkListBox *list_box, GtkListBoxRow *row)
{
GtkListBoxPrivate *priv = list_box->priv;
gboolean was_visible;
was_visible = row->priv->visible;
......@@ -1330,9 +1379,9 @@ update_row_is_visible (GtkListBox *list_box, GtkListBoxRow *row)
gtk_widget_get_child_visible (GTK_WIDGET (row));
if (was_visible && !row->priv->visible)
priv->n_visible_rows--;
list_box_add_visible_rows (list_box, -1);
if (!was_visible && row->priv->visible)
priv->n_visible_rows++;
list_box_add_visible_rows (list_box, 1);
}
static gboolean
......@@ -1563,7 +1612,7 @@ gtk_list_box_real_add (GtkContainer* container, GtkWidget *child)
gtk_widget_set_child_visible (GTK_WIDGET (row), TRUE);
row->priv->visible = gtk_widget_get_visible (GTK_WIDGET (row));
if (row->priv->visible)
priv->n_visible_rows++;
list_box_add_visible_rows (list_box, 1);
gtk_list_box_apply_filter (list_box, row);
if (gtk_widget_get_visible (GTK_WIDGET (list_box)))
{
......@@ -1611,7 +1660,7 @@ gtk_list_box_real_remove (GtkContainer* container, GtkWidget* child)
}
if (row->priv->visible)
priv->n_visible_rows--;
list_box_add_visible_rows (list_box, -1);
if (row->priv->header != NULL)
{
......@@ -1661,6 +1710,9 @@ gtk_list_box_real_forall_internal (GtkContainer* container,
GSequenceIter *iter;
GtkListBoxRow *row;
if (priv->placeholder != NULL && include_internals)
callback (priv->placeholder, callback_target);
iter = g_sequence_get_begin_iter (priv->children);
while (!g_sequence_iter_is_end (iter))
{
......@@ -1723,6 +1775,10 @@ gtk_list_box_real_get_preferred_height_for_width (GtkWidget* widget, gint width,
minimum_height = 0;
if (priv->placeholder != NULL && gtk_widget_get_child_visible (priv->placeholder))
gtk_widget_get_preferred_height_for_width (priv->placeholder, width,
&minimum_height, NULL);
for (iter = g_sequence_get_begin_iter (priv->children);
!g_sequence_iter_is_end (iter);
iter = g_sequence_iter_next (iter))
......@@ -1771,6 +1827,10 @@ gtk_list_box_real_get_preferred_width (GtkWidget* widget, gint* minimum_width_ou
minimum_width = 0;
natural_width = 0;
if (priv->placeholder != NULL && gtk_widget_get_child_visible (priv->placeholder))
gtk_widget_get_preferred_width (priv->placeholder,
&minimum_width, &natural_width);
for (iter = g_sequence_get_begin_iter (priv->children);
!g_sequence_iter_is_end (iter);
iter = g_sequence_iter_next (iter))
......@@ -1841,6 +1901,17 @@ gtk_list_box_real_size_allocate (GtkWidget *widget, GtkAllocation *allocation)
header_allocation.x = 0;
header_allocation.width = allocation->width;
if (priv->placeholder != NULL && gtk_widget_get_child_visible (priv->placeholder))
{
gtk_widget_get_preferred_height_for_width (priv->placeholder,
allocation->width, &child_min, NULL);
header_allocation.height = child_min;
header_allocation.y = child_allocation.y;
gtk_widget_size_allocate (priv->placeholder,
&header_allocation);
child_allocation.y += child_min;
}
for (iter = g_sequence_get_begin_iter (priv->children);
!g_sequence_iter_is_end (iter);
iter = g_sequence_iter_next (iter))
......
......@@ -169,6 +169,9 @@ GDK_AVAILABLE_IN_3_10
void gtk_list_box_select_row (GtkListBox *list_box,
GtkListBoxRow *row);
GDK_AVAILABLE_IN_3_10
void gtk_list_box_set_placeholder (GtkListBox *list_box,
GtkWidget *placeholder);
GDK_AVAILABLE_IN_3_10
void gtk_list_box_set_adjustment (GtkListBox *list_box,
GtkAdjustment *adjustment);
GDK_AVAILABLE_IN_3_10
......
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