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https://gitlab.gnome.org/GNOME/gtk.git
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gtk-demo: Track the selection
Use GtkSelectionFilterModel to track and display the selection. Add some other selection information for good measure.
This commit is contained in:
Matthias Clasen
parent
76533513c2
commit
671daea262
@ -140,6 +140,7 @@
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</gresource>
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<gresource prefix="/listview_colors">
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<file compressed="true">color.names.txt</file>
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<file>listview_colors.css</file>
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</gresource>
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<gresource prefix="/shortcuts">
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<file>shortcuts.ui</file>
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@ -627,6 +627,23 @@ setup_listitem_cb (GtkListItemFactory *factory,
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gtk_expression_unref (color_expression);
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}
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static void
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setup_selection_listitem_cb (GtkListItemFactory *factory,
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GtkListItem *list_item)
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{
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GtkWidget *picture;
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GtkExpression *color_expression, *expression;
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expression = gtk_constant_expression_new (GTK_TYPE_LIST_ITEM, list_item);
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color_expression = gtk_property_expression_new (GTK_TYPE_LIST_ITEM, expression, "item");
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picture = gtk_picture_new ();
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gtk_widget_set_size_request (picture, 8, 8);
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gtk_expression_bind (color_expression, picture, "paintable", NULL);
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gtk_list_item_set_child (list_item, picture);
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}
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static void
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set_title (gpointer item,
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const char *title)
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@ -777,6 +794,47 @@ bind_number_item (GtkSignalListItemFactory *factory,
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g_free (string);
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}
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static void
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update_selection_count (GListModel *model,
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guint position,
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guint removed,
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guint added,
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gpointer data)
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{
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char *text;
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text = g_strdup_printf ("%u", g_list_model_get_n_items (model));
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gtk_label_set_label (GTK_LABEL (data), text);
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g_free (text);
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}
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static void
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update_selection_average (GListModel *model,
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guint position,
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guint removed,
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guint added,
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gpointer data)
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{
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guint n = g_list_model_get_n_items (model);
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GdkRGBA c = { 0, 0, 0, 1 };
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guint i;
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GtkColor *color;
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for (i = 0; i < n; i++)
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{
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color = g_list_model_get_item (model, i);
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c.red += color->color.red;
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c.green += color->color.green;
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c.blue += color->color.blue;
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g_object_unref (color);
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}
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color = gtk_color_new ("", c.red / n, c.green / n, c.blue / n);
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gtk_picture_set_paintable (GTK_PICTURE (data), GDK_PAINTABLE (color));
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g_object_unref (color);
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}
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static GtkWidget *window = NULL;
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GtkWidget *
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@ -797,6 +855,22 @@ do_listview_colors (GtkWidget *do_widget)
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PangoAttrList *attrs;
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char *string;
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guint len;
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GtkWidget *selection_view;
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GListModel *selection_filter;
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GListModel *no_selection;
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GtkWidget *grid;
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GtkWidget *selection_size_label;
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GtkWidget *selection_average_picture;
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GtkWidget *selection_info_toggle;
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GtkWidget *selection_info_revealer;
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GtkCssProvider *provider;
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provider = gtk_css_provider_new ();
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gtk_css_provider_load_from_resource (provider, "/listview_colors/listview_colors.css");
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gtk_style_context_add_provider_for_display (gdk_display_get_default (),
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GTK_STYLE_PROVIDER (provider),
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800);
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g_object_unref (provider);
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window = gtk_window_new ();
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gtk_window_set_title (GTK_WINDOW (window), "Colors");
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@ -809,14 +883,85 @@ do_listview_colors (GtkWidget *do_widget)
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gtk_widget_get_display (do_widget));
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g_object_add_weak_pointer (G_OBJECT (window), (gpointer*)&window);
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box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
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gtk_window_set_child (GTK_WINDOW (window), box);
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selection_info_revealer = gtk_revealer_new ();
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gtk_box_append (GTK_BOX (box), selection_info_revealer);
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grid = gtk_grid_new ();
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gtk_revealer_set_child (GTK_REVEALER (selection_info_revealer), grid);
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gtk_widget_set_margin_start (grid, 10);
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gtk_widget_set_margin_end (grid, 10);
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gtk_widget_set_margin_top (grid, 10);
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gtk_widget_set_margin_bottom (grid, 10);
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gtk_grid_set_row_spacing (GTK_GRID (grid), 10);
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gtk_grid_set_column_spacing (GTK_GRID (grid), 10);
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label = gtk_label_new ("Selection");
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gtk_widget_set_hexpand (label, TRUE);
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gtk_widget_add_css_class (label, "title-3");
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gtk_grid_attach (GTK_GRID (grid), label, 0, 0, 5, 1);
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gtk_grid_attach (GTK_GRID (grid), gtk_label_new ("Size:"), 0, 2, 1, 1);
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selection_size_label = gtk_label_new ("0");
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gtk_grid_attach (GTK_GRID (grid), selection_size_label, 1, 2, 1, 1);
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gtk_grid_attach (GTK_GRID (grid), gtk_label_new ("Average:"), 2, 2, 1, 1);
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selection_average_picture = gtk_picture_new ();
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gtk_widget_set_size_request (selection_average_picture, 32, 32);
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gtk_grid_attach (GTK_GRID (grid), selection_average_picture, 3, 2, 1, 1);
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label = gtk_label_new ("");
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gtk_widget_set_hexpand (label, TRUE);
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gtk_grid_attach (GTK_GRID (grid), label, 4, 2, 1, 1);
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sw = gtk_scrolled_window_new ();
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gtk_window_set_child (GTK_WINDOW (window), sw);
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gtk_widget_set_hexpand (sw, TRUE);
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gtk_grid_attach (GTK_GRID (grid), sw, 0, 1, 5, 1);
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gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
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GTK_POLICY_NEVER,
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GTK_POLICY_AUTOMATIC);
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factory = gtk_signal_list_item_factory_new ();
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g_signal_connect (factory, "setup", G_CALLBACK (setup_selection_listitem_cb), NULL);
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selection_view = gtk_grid_view_new_with_factory (factory);
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gtk_widget_add_css_class (selection_view, "compact");
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gtk_grid_view_set_max_columns (GTK_GRID_VIEW (selection_view), 200);
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gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), selection_view);
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sw = gtk_scrolled_window_new ();
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gtk_box_append (GTK_BOX (box), sw);
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gridview = create_color_grid ();
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gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), gridview);
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gtk_widget_set_hexpand (sw, TRUE);
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gtk_widget_set_vexpand (sw, TRUE);
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model = gtk_grid_view_get_model (GTK_GRID_VIEW (gridview));
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selection_filter = G_LIST_MODEL (gtk_selection_filter_model_new (GTK_SELECTION_MODEL (model)));
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g_signal_connect (selection_filter, "items-changed", G_CALLBACK (update_selection_count), selection_size_label);
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g_signal_connect (selection_filter, "items-changed", G_CALLBACK (update_selection_average), selection_average_picture);
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no_selection = G_LIST_MODEL (gtk_no_selection_new (selection_filter));
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gtk_grid_view_set_model (GTK_GRID_VIEW (selection_view), no_selection);
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g_object_unref (selection_filter);
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g_object_unref (no_selection);
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g_object_get (model, "model", &model, NULL);
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selection_info_toggle = gtk_toggle_button_new ();
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gtk_button_set_icon_name (GTK_BUTTON (selection_info_toggle), "emblem-important-symbolic");
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gtk_widget_set_tooltip_text (selection_info_toggle, "Show selection info");
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gtk_header_bar_pack_start (GTK_HEADER_BAR (header), selection_info_toggle);
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g_object_bind_property (selection_info_toggle, "active",
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selection_info_revealer, "reveal-child",
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G_BINDING_DEFAULT);
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button = gtk_button_new_with_mnemonic ("_Refill");
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g_signal_connect (button, "clicked",
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G_CALLBACK (refill),
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3
demos/gtk-demo/listview_colors.css
Normal file
3
demos/gtk-demo/listview_colors.css
Normal file
@ -0,0 +1,3 @@
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.view.compact > child {
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padding: 1px;
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}
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