[gtk/wip/otte/listview: 152/169] listview: Implement extending selections
- From: Benjamin Otte <otte src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [gtk/wip/otte/listview: 152/169] listview: Implement extending selections
- Date: Tue, 15 Oct 2019 05:22:31 +0000 (UTC)
commit 8b12e8acd4a149e1c8eb8b686297197b37a9cfe3
Author: Benjamin Otte <otte redhat com>
Date: Sun Oct 6 04:10:09 2019 +0200
listview: Implement extending selections
Shift-clicking to extend selections now also works, imitating the
behavior of normal clicking and Windows Explorer (but not treeview):
1. We track the last selected item (normally, not via extend-clicking).
2. When shift-selecting, we modify the range from the last selected item
to this item the same way we modify the regular item when not using
shift:
2a. If Ctrl is not pressed, we select the range and unselect everything
else.
2b. If Ctrl is pressed, we make the range have the same selection state
as the last selected item:
- If the last selected item is selected, select the range.
- If the last selected item is not selected, unselect the range.
gtk/gtklistview.c | 60 +++++++++++++++++++++++++++++++++++++++++++++++++++----
1 file changed, 56 insertions(+), 4 deletions(-)
---
diff --git a/gtk/gtklistview.c b/gtk/gtklistview.c
index 29cc7ef372..53a17c44b8 100644
--- a/gtk/gtklistview.c
+++ b/gtk/gtklistview.c
@@ -68,6 +68,8 @@ struct _GtkListView
GtkListItemTracker *anchor;
double anchor_align;
+ /* the last item that was selected - basically the location to extend selections from */
+ GtkListItemTracker *selected;
};
struct _ListRow
@@ -567,6 +569,11 @@ gtk_list_view_dispose (GObject *object)
gtk_list_item_tracker_free (self->item_manager, self->anchor);
self->anchor = NULL;
}
+ if (self->selected)
+ {
+ gtk_list_item_tracker_free (self->item_manager, self->selected);
+ self->selected = NULL;
+ }
g_clear_object (&self->item_manager);
G_OBJECT_CLASS (gtk_list_view_parent_class)->dispose (object);
@@ -711,22 +718,66 @@ gtk_list_view_select_item (GtkWidget *widget,
GtkSelectionModel *selection_model;
guint pos;
gboolean modify, extend;
+ gboolean success = FALSE;
selection_model = gtk_list_item_manager_get_model (self->item_manager);
g_variant_get (parameter, "(ubb)", &pos, &modify, &extend);
- /* XXX: handle extend by tracking the item to extend from */
+ if (extend)
+ {
+ guint start_pos = gtk_list_item_tracker_get_position (self->item_manager, self->selected);
+ if (start_pos != GTK_INVALID_LIST_POSITION)
+ {
+ guint max = MAX (start_pos, pos);
+ guint min = MIN (start_pos, pos);
+ if (modify)
+ {
+ if (gtk_selection_model_is_selected (selection_model, start_pos))
+ {
+ success = gtk_selection_model_select_range (selection_model,
+ min,
+ max - min + 1,
+ FALSE);
+ }
+ else
+ {
+ success = gtk_selection_model_unselect_range (selection_model,
+ min,
+ max - min + 1);
+ }
+ }
+ else
+ {
+ success = gtk_selection_model_select_range (selection_model,
+ min,
+ max - min + 1,
+ TRUE);
+ }
+ }
+ /* If there's no range to select or selecting ranges isn't supported
+ * by the model, fall through to normal setting.
+ */
+ }
+ if (success)
+ return;
if (modify)
{
if (gtk_selection_model_is_selected (selection_model, pos))
- gtk_selection_model_unselect_item (selection_model, pos);
+ success = gtk_selection_model_unselect_item (selection_model, pos);
else
- gtk_selection_model_select_item (selection_model, pos, FALSE);
+ success = gtk_selection_model_select_item (selection_model, pos, FALSE);
}
else
{
- gtk_selection_model_select_item (selection_model, pos, TRUE);
+ success = gtk_selection_model_select_item (selection_model, pos, TRUE);
+ }
+ if (success)
+ {
+ gtk_list_item_tracker_set_position (self->item_manager,
+ self->selected,
+ pos,
+ 0, 0);
}
}
@@ -871,6 +922,7 @@ gtk_list_view_init (GtkListView *self)
{
self->item_manager = gtk_list_item_manager_new (GTK_WIDGET (self), ListRow, ListRowAugment,
list_row_augment);
self->anchor = gtk_list_item_tracker_new (self->item_manager);
+ self->selected = gtk_list_item_tracker_new (self->item_manager);
self->adjustment[GTK_ORIENTATION_HORIZONTAL] = gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
self->adjustment[GTK_ORIENTATION_VERTICAL] = gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
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