gtk2/demos/gtk-demo/iconview_edit.c
2020-02-14 21:18:49 +01:00

159 lines
4.2 KiB
C

/* Icon View/Editing and Drag-and-Drop
*
* The GtkIconView widget supports Editing and Drag-and-Drop.
* This example also demonstrates using the generic GtkCellLayout
* interface to set up cell renderers in an icon view.
*/
#include <gtk/gtk.h>
#include <string.h>
enum
{
COL_TEXT,
NUM_COLS
};
static void
fill_store (GtkListStore *store)
{
GtkTreeIter iter;
const gchar *text[] = { "Red", "Green", "Blue", "Yellow" };
gint i;
/* First clear the store */
gtk_list_store_clear (store);
for (i = 0; i < 4; i++)
{
gtk_list_store_append (store, &iter);
gtk_list_store_set (store, &iter, COL_TEXT, text[i], -1);
}
}
static GtkListStore *
create_store (void)
{
GtkListStore *store;
store = gtk_list_store_new (NUM_COLS, G_TYPE_STRING);
return store;
}
static void
set_cell_color (GtkCellLayout *cell_layout,
GtkCellRenderer *cell,
GtkTreeModel *tree_model,
GtkTreeIter *iter,
gpointer data)
{
gchar *text;
GdkRGBA color;
guint32 pixel = 0;
GdkPixbuf *pixbuf;
gtk_tree_model_get (tree_model, iter, COL_TEXT, &text, -1);
if (!text)
return;
if (gdk_rgba_parse (&color, text))
pixel =
((gint)(color.red * 255)) << 24 |
((gint)(color.green * 255)) << 16 |
((gint)(color.blue * 255)) << 8 |
((gint)(color.alpha * 255));
g_free (text);
pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8, 24, 24);
gdk_pixbuf_fill (pixbuf, pixel);
g_object_set (cell, "pixbuf", pixbuf, NULL);
g_object_unref (pixbuf);
}
static void
edited (GtkCellRendererText *cell,
gchar *path_string,
gchar *text,
gpointer data)
{
GtkTreeModel *model;
GtkTreeIter iter;
GtkTreePath *path;
model = gtk_icon_view_get_model (GTK_ICON_VIEW (data));
path = gtk_tree_path_new_from_string (path_string);
gtk_tree_model_get_iter (model, &iter, path);
gtk_list_store_set (GTK_LIST_STORE (model), &iter,
COL_TEXT, text, -1);
gtk_tree_path_free (path);
}
GtkWidget *
do_iconview_edit (GtkWidget *do_widget)
{
static GtkWidget *window = NULL;
if (!window)
{
GtkWidget *icon_view;
GtkListStore *store;
GtkCellRenderer *renderer;
window = gtk_window_new ();
gtk_window_set_display (GTK_WINDOW (window),
gtk_widget_get_display (do_widget));
gtk_window_set_title (GTK_WINDOW (window), "Editing and Drag-and-Drop");
g_signal_connect (window, "destroy",
G_CALLBACK (gtk_widget_destroyed), &window);
store = create_store ();
fill_store (store);
icon_view = gtk_icon_view_new_with_model (GTK_TREE_MODEL (store));
g_object_unref (store);
gtk_icon_view_set_selection_mode (GTK_ICON_VIEW (icon_view),
GTK_SELECTION_SINGLE);
gtk_icon_view_set_item_orientation (GTK_ICON_VIEW (icon_view),
GTK_ORIENTATION_HORIZONTAL);
gtk_icon_view_set_columns (GTK_ICON_VIEW (icon_view), 2);
gtk_icon_view_set_reorderable (GTK_ICON_VIEW (icon_view), TRUE);
renderer = gtk_cell_renderer_pixbuf_new ();
gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (icon_view),
renderer, TRUE);
gtk_cell_layout_set_cell_data_func (GTK_CELL_LAYOUT (icon_view),
renderer,
set_cell_color,
NULL, NULL);
renderer = gtk_cell_renderer_text_new ();
gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (icon_view),
renderer, TRUE);
g_object_set (renderer, "editable", TRUE, NULL);
g_signal_connect (renderer, "edited", G_CALLBACK (edited), icon_view);
gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (icon_view),
renderer,
"text", COL_TEXT,
NULL);
gtk_container_add (GTK_CONTAINER (window), icon_view);
}
if (!gtk_widget_get_visible (window))
gtk_widget_show (window);
else
gtk_widget_destroy (window);
return window;
}