diff --git a/examples/Makefile.am b/examples/Makefile.am index 710d4a35ec..a455c03ac8 100644 --- a/examples/Makefile.am +++ b/examples/Makefile.am @@ -28,7 +28,8 @@ noinst_PROGRAMS = \ grid-packing \ drawing \ builder \ - search-bar + search-bar \ + listbox-dnd EXTRA_DIST = builder.ui diff --git a/examples/listbox-dnd.c b/examples/listbox-dnd.c new file mode 100644 index 0000000000..ab77209629 --- /dev/null +++ b/examples/listbox-dnd.c @@ -0,0 +1,155 @@ +#include + +static GtkTargetEntry entries[] = { + { "GTK_LIST_BOX_ROW", GTK_TARGET_SAME_APP, 0 } +}; + +static void +drag_begin (GtkWidget *widget, + GdkDragContext *context, + gpointer data) +{ + GtkWidget *row; + GtkAllocation alloc; + cairo_surface_t *surface; + cairo_t *cr; + int x, y; + + row = gtk_widget_get_ancestor (widget, GTK_TYPE_LIST_BOX_ROW); + gtk_widget_get_allocation (row, &alloc); + surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, alloc.width, alloc.height); + cr = cairo_create (surface); + + gtk_style_context_add_class (gtk_widget_get_style_context (row), "drag-icon"); + gtk_widget_draw (row, cr); + gtk_style_context_remove_class (gtk_widget_get_style_context (row), "drag-icon"); + + gtk_widget_translate_coordinates (widget, row, 0, 0, &x, &y); + cairo_surface_set_device_offset (surface, -x, -y); + gtk_drag_set_icon_surface (context, surface); + + cairo_destroy (cr); + cairo_surface_destroy (surface); +} + +void +drag_data_get (GtkWidget *widget, + GdkDragContext *context, + GtkSelectionData *selection_data, + guint info, + guint time, + gpointer data) +{ + gtk_selection_data_set (selection_data, + gdk_atom_intern_static_string ("GTK_LIST_BOX_ROW"), + 32, + (const guchar *)&widget, + sizeof (gpointer)); +} + +static void +drag_data_received (GtkWidget *widget, + GdkDragContext *context, + gint x, + gint y, + GtkSelectionData *selection_data, + guint info, + guint32 time, + gpointer data) +{ + GtkWidget *target; + GtkWidget *row; + GtkWidget *source; + int pos; + + target = widget; + + pos = gtk_list_box_row_get_index (GTK_LIST_BOX_ROW (target)); + row = (gpointer)* (gpointer*)gtk_selection_data_get_data (selection_data); + source = gtk_widget_get_ancestor (row, GTK_TYPE_LIST_BOX_ROW); + + if (source == target) + return; + + g_object_ref (source); + gtk_container_remove (GTK_CONTAINER (gtk_widget_get_parent (source)), source); + gtk_list_box_insert (GTK_LIST_BOX (gtk_widget_get_parent (target)), source, pos); + g_object_unref (source); +} + +static GtkWidget * +create_row (const gchar *text) +{ + GtkWidget *row, *handle, *box, *label, *image; + + row = gtk_list_box_row_new (); + + box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 10); + g_object_set (box, "margin-start", 10, "margin-end", 10, NULL); + gtk_container_add (GTK_CONTAINER (row), box); + + handle = gtk_event_box_new (); + image = gtk_image_new_from_icon_name ("open-menu-symbolic", 1); + gtk_container_add (GTK_CONTAINER (handle), image); + gtk_container_add (GTK_CONTAINER (box), handle); + + label = gtk_label_new (text); + gtk_container_add_with_properties (GTK_CONTAINER (box), label, "expand", TRUE, NULL); + + gtk_drag_source_set (handle, GDK_BUTTON1_MASK, entries, 1, GDK_ACTION_MOVE); + g_signal_connect (handle, "drag-begin", G_CALLBACK (drag_begin), NULL); + g_signal_connect (handle, "drag-data-get", G_CALLBACK (drag_data_get), NULL); + + gtk_drag_dest_set (row, GTK_DEST_DEFAULT_ALL, entries, 1, GDK_ACTION_MOVE); + g_signal_connect (row, "drag-data-received", G_CALLBACK (drag_data_received), NULL); + + return row; +} + +static const char *css = + ".drag-icon { " + " background: white; " + " border: 1px solid black; " + "}"; + +int +main (int argc, char *argv[]) +{ + GtkWidget *window, *list, *sw, *row; + gint i; + gchar *text; + GtkCssProvider *provider; + + gtk_init (NULL, NULL); + + provider = gtk_css_provider_new (); + gtk_css_provider_load_from_data (provider, css, -1, NULL); + gtk_style_context_add_provider_for_screen (gdk_screen_get_default (), + GTK_STYLE_PROVIDER (provider), + GTK_STYLE_PROVIDER_PRIORITY_APPLICATION); + + window = gtk_window_new (GTK_WINDOW_TOPLEVEL); + gtk_window_set_default_size (GTK_WINDOW (window), -1, 300); + + sw = gtk_scrolled_window_new (NULL, NULL); + gtk_widget_set_hexpand (sw, TRUE); + gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw), GTK_POLICY_NEVER, GTK_POLICY_ALWAYS); + gtk_container_add (GTK_CONTAINER (window), sw); + + list = gtk_list_box_new (); + gtk_list_box_set_selection_mode (GTK_LIST_BOX (list), GTK_SELECTION_NONE); + gtk_container_add (GTK_CONTAINER (sw), list); + + for (i = 0; i < 20; i++) + { + text = g_strdup_printf ("Row %d", i); + row = create_row (text); + gtk_list_box_insert (GTK_LIST_BOX (list), row, -1); + } + + gtk_widget_show_all (window); + + gtk_main (); + + return 0; +}