#include <gtk/gtk.h>
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);
g_object_set_data (G_OBJECT (gtk_widget_get_parent (row)), "drag-row", row);
gtk_style_context_add_class (gtk_widget_get_style_context (row), "drag-row");
}
static void
drag_end (GtkWidget *widget,
GdkDragContext *context,
gpointer data)
{
GtkWidget *row;
row = gtk_widget_get_ancestor (widget, GTK_TYPE_LIST_BOX_ROW);
g_object_set_data (G_OBJECT (gtk_widget_get_parent (row)), "drag-row", NULL);
gtk_style_context_remove_class (gtk_widget_get_style_context (row), "drag-row");
gtk_style_context_remove_class (gtk_widget_get_style_context (row), "drag-hover");
}
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 GtkListBoxRow *
get_last_row (GtkListBox *list)
{
int i;
GtkListBoxRow *row;
row = NULL;
for (i = 0; ; i++)
{
GtkListBoxRow *tmp;
tmp = gtk_list_box_get_row_at_index (list, i);
if (tmp == NULL)
return row;
row = tmp;
}
return row;
}
static GtkListBoxRow *
get_row_before (GtkListBox *list,
GtkListBoxRow *row)
{
int pos = gtk_list_box_row_get_index (row);
return gtk_list_box_get_row_at_index (list, pos - 1);
}
static GtkListBoxRow *
get_row_after (GtkListBox *list,
GtkListBoxRow *row)
{
int pos = gtk_list_box_row_get_index (row);
return gtk_list_box_get_row_at_index (list, pos + 1);
}
static void
drag_data_received (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
GtkSelectionData *selection_data,
guint info,
guint32 time,
gpointer data)
{
GtkWidget *row_before;
GtkWidget *row_after;
GtkWidget *row;
GtkWidget *source;
int pos;
row_before = GTK_WIDGET (g_object_get_data (G_OBJECT (widget), "row-before"));
row_after = GTK_WIDGET (g_object_get_data (G_OBJECT (widget), "row-after"));
g_object_set_data (G_OBJECT (widget), "row-before", NULL);
g_object_set_data (G_OBJECT (widget), "row-after", NULL);
if (row_before)
gtk_style_context_remove_class (gtk_widget_get_style_context (row_before), "drag-hover-bottom");
if (row_after)
gtk_style_context_remove_class (gtk_widget_get_style_context (row_after), "drag-hover-top");
row = (gpointer)* (gpointer*)gtk_selection_data_get_data (selection_data);
source = gtk_widget_get_ancestor (row, GTK_TYPE_LIST_BOX_ROW);
if (source == row_after)
return;
g_object_ref (source);
gtk_container_remove (GTK_CONTAINER (gtk_widget_get_parent (source)), source);
if (row_after)
pos = gtk_list_box_row_get_index (GTK_LIST_BOX_ROW (row_after));
else
pos = gtk_list_box_row_get_index (GTK_LIST_BOX_ROW (row_before)) + 1;
gtk_list_box_insert (GTK_LIST_BOX (widget), source, pos);
g_object_unref (source);
}
static gboolean
drag_motion (GtkWidget *widget,
GdkDragContext *context,
int x,
int y,
guint time)
{
GtkAllocation alloc;
GtkWidget *row;
int hover_row_y;
int hover_row_height;
GtkWidget *drag_row;
GtkWidget *row_before;
GtkWidget *row_after;
row = GTK_WIDGET (gtk_list_box_get_row_at_y (GTK_LIST_BOX (widget), y));
drag_row = GTK_WIDGET (g_object_get_data (G_OBJECT (widget), "drag-row"));
row_before = GTK_WIDGET (g_object_get_data (G_OBJECT (widget), "row-before"));
row_after = GTK_WIDGET (g_object_get_data (G_OBJECT (widget), "row-after"));
gtk_style_context_remove_class (gtk_widget_get_style_context (drag_row), "drag-hover");
if (row_before)
gtk_style_context_remove_class (gtk_widget_get_style_context (row_before), "drag-hover-bottom");
if (row_after)
gtk_style_context_remove_class (gtk_widget_get_style_context (row_after), "drag-hover-top");
if (row)
{
gtk_widget_get_allocation (row, &alloc);
hover_row_y = alloc.y;
hover_row_height = alloc.height;
if (y < hover_row_y + hover_row_height/2)
{
row_after = row;
row_before = GTK_WIDGET (get_row_before (GTK_LIST_BOX (widget), GTK_LIST_BOX_ROW (row)));
}
else
{
row_before = row;
row_after = GTK_WIDGET (get_row_after (GTK_LIST_BOX (widget), GTK_LIST_BOX_ROW (row)));
}
}
else
{
row_before = GTK_WIDGET (get_last_row (GTK_LIST_BOX (widget)));
row_after = NULL;
}
g_object_set_data (G_OBJECT (widget), "row-before", row_before);
g_object_set_data (G_OBJECT (widget), "row-after", row_after);
if (drag_row == row_before || drag_row == row_after)
{
gtk_style_context_add_class (gtk_widget_get_style_context (drag_row), "drag-hover");
return FALSE;
}
if (row_before)
gtk_style_context_add_class (gtk_widget_get_style_context (row_before), "drag-hover-bottom");
if (row_after)
gtk_style_context_add_class (gtk_widget_get_style_context (row_after), "drag-hover-top");
return TRUE;
}
static void
drag_leave (GtkWidget *widget,
GdkDragContext *context,
guint time)
{
GtkWidget *drag_row;
GtkWidget *row_before;
GtkWidget *row_after;
drag_row = GTK_WIDGET (g_object_get_data (G_OBJECT (widget), "drag-row"));
row_before = GTK_WIDGET (g_object_get_data (G_OBJECT (widget), "row-before"));
row_after = GTK_WIDGET (g_object_get_data (G_OBJECT (widget), "row-after"));
gtk_style_context_remove_class (gtk_widget_get_style_context (drag_row), "drag-hover");
if (row_before)
gtk_style_context_remove_class (gtk_widget_get_style_context (row_before), "drag-hover-bottom");
if (row_after)
gtk_style_context_remove_class (gtk_widget_get_style_context (row_after), "drag-hover-top");
}
static GtkWidget *
create_row (const gchar *text)
{
GtkWidget *row, *ebox, *box, *label, *image;
row = gtk_list_box_row_new ();
ebox = gtk_event_box_new ();
image = gtk_image_new_from_icon_name ("open-menu-symbolic", 1);
gtk_container_add (GTK_CONTAINER (ebox), image);
box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 10);
g_object_set (box, "margin-start", 10, "margin-end", 10, NULL);
label = gtk_label_new (text);
gtk_container_add (GTK_CONTAINER (row), box);
gtk_box_pack_start (GTK_BOX (box), label, TRUE, FALSE, 0);
gtk_container_add (GTK_CONTAINER (box), ebox);
gtk_style_context_add_class (gtk_widget_get_style_context (row), "row");
gtk_drag_source_set (ebox, GDK_BUTTON1_MASK, entries, 1, GDK_ACTION_MOVE);
g_signal_connect (ebox, "drag-begin", G_CALLBACK (drag_begin), NULL);
g_signal_connect (ebox, "drag-end", G_CALLBACK (drag_end), NULL);
g_signal_connect (ebox, "drag-data-get", G_CALLBACK (drag_data_get), NULL);
return row;
}
static void
on_row_activated (GtkListBox *self,
GtkWidget *child)
{
const char *id;
id = g_object_get_data (G_OBJECT (gtk_bin_get_child (GTK_BIN (child))), "id");
g_message ("Row activated %p: %s", child, id);
}
static void
on_selected_children_changed (GtkListBox *self)
{
g_message ("Selection changed");
}
static void
a11y_selection_changed (AtkObject *obj)
{
g_message ("Accessible selection changed");
}
static void
selection_mode_changed (GtkComboBox *combo, gpointer data)
{
GtkListBox *list = data;
gtk_list_box_set_selection_mode (list, gtk_combo_box_get_active (combo));
}
static const char *css =
".row:not(:first-child) { "
" border-top: 1px solid alpha(gray,0.5); "
" border-bottom: 1px solid transparent; "
"}"
".row:first-child { "
" border-top: 1px solid transparent; "
" border-bottom: 1px solid transparent; "
"}"
".row:last-child { "
" border-top: 1px solid alpha(gray,0.5); "
" border-bottom: 1px solid alpha(gray,0.5); "
"}"
".row.drag-icon { "
" background: white; "
" border: 1px solid black; "
"}"
".row.drag-row { "
" color: gray; "
" background: alpha(gray,0.2); "
"}"
".row.drag-row.drag-hover { "
" border-top: 1px solid #4e9a06; "
" border-bottom: 1px solid #4e9a06; "
"}"
".row.drag-hover image, "
".row.drag-hover label { "
" color: #4e9a06; "
"}"
".row.drag-hover-top {"
" border-top: 1px solid #4e9a06; "
"}"
".row.drag-hover-bottom {"
" border-bottom: 1px solid #4e9a06; "
"}"
;
int
main (int argc, char *argv[])
{
GtkWidget *window, *list, *sw, *row;
GtkWidget *hbox, *vbox, *combo, *button;
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), 800);
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_default_size (GTK_WINDOW (window), -1, 300);
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 12);
gtk_container_add (GTK_CONTAINER (window), hbox);
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 6);
g_object_set (vbox, "margin", 12, NULL);
gtk_container_add (GTK_CONTAINER (hbox), vbox);
list = gtk_list_box_new ();
gtk_list_box_set_selection_mode (GTK_LIST_BOX (list), GTK_SELECTION_NONE);
gtk_drag_dest_set (list, GTK_DEST_DEFAULT_MOTION | GTK_DEST_DEFAULT_DROP, entries, 1, GDK_ACTION_MOVE);
g_signal_connect (list, "drag-data-received", G_CALLBACK (drag_data_received), NULL);
g_signal_connect (list, "drag-motion", G_CALLBACK (drag_motion), NULL);
g_signal_connect (list, "drag-leave", G_CALLBACK (drag_leave), NULL);
g_signal_connect (list, "row-activated", G_CALLBACK (on_row_activated), NULL);
g_signal_connect (list, "selected-rows-changed", G_CALLBACK (on_selected_children_changed), NULL);
g_signal_connect (gtk_widget_get_accessible (list), "selection-changed", G_CALLBACK (a11y_selection_changed), NULL);
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 (hbox), sw);
gtk_container_add (GTK_CONTAINER (sw), list);
button = gtk_check_button_new_with_label ("Activate on single click");
g_object_bind_property (list, "activate-on-single-click",
button, "active",
G_BINDING_BIDIRECTIONAL | G_BINDING_SYNC_CREATE);
gtk_container_add (GTK_CONTAINER (vbox), button);
combo = gtk_combo_box_text_new ();
gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "None");
gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "Single");
gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "Browse");
gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "Multiple");
g_signal_connect (combo, "changed", G_CALLBACK (selection_mode_changed), list);
gtk_container_add (GTK_CONTAINER (vbox), combo);
gtk_combo_box_set_active (GTK_COMBO_BOX (combo), gtk_list_box_get_selection_mode (GTK_LIST_BOX (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;
}