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Make gtk_scrolled_window_remove() smart

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If gtk_scrolled_window_add() has added a GtkViewport,
  gtk_container_remove (GTK_CONTAINER (scrolled_window), child_widget);
or
  gtk_container_remove(GTK_CONTAINER(scrolled_window),
                       gtk_bin_get_child(GTK_BIN(scrolled_window)));
removes both the added child widget and the viewport.

https://bugzilla.gnome.org/show_bug.cgi?id=710471
This commit is contained in:
Kjell Ahlstedt 2016-06-08 10:30:22 +02:00
parent 3f3a226090
commit ff5304ee13
1 changed files with 48 additions and 2 deletions
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50
gtk/gtkscrolledwindow.c
View File

@ -78,6 +78,17 @@
* widgets that don’t implement #GtkScrollable natively, so you can
* ignore the presence of the viewport.
*
* If gtk_container_add() has added a #GtkViewport for you, you can remove
* both your added child widget from the #GtkViewport and the #GtkViewport
* from the GtkScrolledWindow with either of the calls
* |[<!-- language="C" -->
* gtk_container_remove (GTK_CONTAINER (scrolled_window),
* child_widget);
* // or
* gtk_container_remove (GTK_CONTAINER (scrolled_window),
* gtk_bin_get_child (GTK_BIN (scrolled_window)));
* ]|
*
* The position of the scrollbars is controlled by the scroll adjustments.
* See #GtkAdjustment for the fields in an adjustment — for
* #GtkScrollbar, used by GtkScrolledWindow, the “value” field
@ -229,6 +240,7 @@ struct _GtkScrolledWindowPrivate
guint focus_out : 1; /* used by ::move-focus-out implementation */
guint overlay_scrolling : 1;
guint use_indicators : 1;
guint auto_added_viewport : 1;
gint min_content_width;
gint min_content_height;
@ -2099,6 +2111,7 @@ gtk_scrolled_window_init (GtkScrolledWindow *scrolled_window)
priv->hscrollbar_visible = FALSE;
priv->vscrollbar_visible = FALSE;
priv->focus_out = FALSE;
priv->auto_added_viewport = FALSE;
priv->window_placement = GTK_CORNER_TOP_LEFT;
priv->min_content_width = -1;
priv->min_content_height = -1;
@ -3897,6 +3910,7 @@ gtk_scrolled_window_add (GtkContainer *container,
gtk_container_set_focus_vadjustment (GTK_CONTAINER (scrollable_child),
gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (scrolled_window)));
gtk_container_add (GTK_CONTAINER (scrollable_child), child);
priv->auto_added_viewport = TRUE;
}
_gtk_bin_set_child (bin, scrollable_child);
@ -3909,9 +3923,41 @@ static void
gtk_scrolled_window_remove (GtkContainer *container,
GtkWidget *child)
{
g_object_set (child, "hadjustment", NULL, "vadjustment", NULL, NULL);
GtkScrolledWindowPrivate *priv;
GtkScrolledWindow *scrolled_window;
GtkWidget *scrollable_child;
GTK_CONTAINER_CLASS (gtk_scrolled_window_parent_class)->remove (container, child);
scrolled_window = GTK_SCROLLED_WINDOW (container);
priv = scrolled_window->priv;
if (!priv->auto_added_viewport)
{
scrollable_child = child;
}
else
{
scrollable_child = gtk_bin_get_child (GTK_BIN (container));
if (scrollable_child == child)
{
/* @child is the automatically added viewport. */
GtkWidget *grandchild = gtk_bin_get_child (GTK_BIN (child));
/* Remove the viewport's child, if any. */
if (grandchild)
gtk_container_remove (GTK_CONTAINER (child), grandchild);
}
else
{
/* @child is (assumed to be) the viewport's child. */
gtk_container_remove (GTK_CONTAINER (scrollable_child), child);
}
}
g_object_set (scrollable_child, "hadjustment", NULL, "vadjustment", NULL, NULL);
GTK_CONTAINER_CLASS (gtk_scrolled_window_parent_class)->remove (container, scrollable_child);
priv->auto_added_viewport = FALSE;
}
/**