gtk3-demo: Add a cursors demo
This commit is contained in:
Matthias Clasen
@ -17,6 +17,7 @@ demos = \
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css_multiplebgs.c \
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css_pixbufs.c \
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css_shadows.c \
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cursors.c \
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dialog.c \
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drawingarea.c \
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editable_cells.c \
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221
demos/gtk-demo/cursors.c
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221
demos/gtk-demo/cursors.c
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@ -0,0 +1,221 @@
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/* Cursors
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*
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* Demonstrates a useful set of available cursors.
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*/
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#include <gtk/gtk.h>
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static void
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set_cursor (GtkWidget *button, gpointer data)
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{
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GtkWidget *toplevel;
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GdkCursor *cursor = data;
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GdkWindow *window;
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toplevel = gtk_widget_get_toplevel (button);
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window = gtk_widget_get_window (toplevel);
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gdk_window_set_cursor (window, cursor);
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}
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static GtkWidget *
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add_section (GtkWidget *box,
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const gchar *heading)
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{
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GtkWidget *label;
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GtkWidget *section;
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label = gtk_label_new (heading);
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gtk_label_set_xalign (GTK_LABEL (label), 0.0);
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gtk_widget_set_margin_top (label, 10);
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gtk_widget_set_margin_bottom (label, 10);
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gtk_box_pack_start (GTK_BOX (box), label, FALSE, TRUE, 0);
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section = gtk_flow_box_new ();
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gtk_widget_set_halign (section, GTK_ALIGN_START);
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gtk_flow_box_set_selection_mode (GTK_FLOW_BOX (section), GTK_SELECTION_NONE);
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gtk_flow_box_set_min_children_per_line (GTK_FLOW_BOX (section), 2);
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gtk_flow_box_set_max_children_per_line (GTK_FLOW_BOX (section), 20);
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gtk_box_pack_start (GTK_BOX (box), section, FALSE, TRUE, 0);
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return section;
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}
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/* Map css cursor names to cursors commonly available in cursor themes */
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static const struct {
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const char *css_name, *name;
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} name_map[] = {
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{ "default", "left_ptr" },
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{ "none", NULL },
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{ "help", "help" },
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{ "context-menu", "context-menu" },
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{ "pointer", "hand" },
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{ "progress", "left_ptr_watch" },
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{ "wait", "watch" },
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{ "cell", "crosshair" },
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{ "crosshair", "tcross" },
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{ "text", "xterm" },
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{ "vertical-text", "vertical-text" },
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{ "alias", "dnd-link" },
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{ "copy", "dnd-copy" },
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{ "move", "move" },
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{ "no-drop", "dnd-none" },
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{ "not-allowed", "crossed_circle" },
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{ "grab", "grab" },
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{ "grabbing", "grabbing" },
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{ "all-scroll", "all-scroll" },
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{ "col-resize", "h_double_arrow" },
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{ "row-resize", "v_double_arrow" },
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{ "n-resize", "top_side" },
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{ "e-resize", "right_side" },
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{ "s-resize", "bottom_side" },
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{ "w-resize", "left_side" },
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{ "ne-resize", "top_right_corner" },
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{ "nw-resize", "top_left_corner" },
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{ "sw-resize", "bottom_left_corner" },
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{ "se-resize", "bottom_right_corner" },
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{ "ew-resize", "h_double_arrow" },
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{ "ns-resize", "v_double_arrow" },
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{ "nesw-resize", "fd_double_arrow" },
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{ "nwse-resize", "bd_double_arrow" },
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{ "zoom-in", "zoom-in" },
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{ "zoome-out", "zoom-out" },
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{ NULL, NULL }
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};
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static const gchar *
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lookup_name (const gchar *css_name)
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{
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gint i;
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for (i = 0; name_map[i].css_name; i++)
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{
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if (g_strcmp0 (name_map[i].css_name, css_name) == 0)
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return name_map[i].name;
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}
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return css_name;
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}
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static void
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add_button (GtkWidget *section,
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const gchar *css_name)
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{
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GtkWidget *image, *button;
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GdkDisplay *display;
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GdkCursor *cursor;
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const gchar *name;
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name = lookup_name (css_name);
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display = gtk_widget_get_display (section);
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if (name == NULL)
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cursor = gdk_cursor_new_for_display (display, GDK_BLANK_CURSOR);
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else
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cursor = gdk_cursor_new_from_name (display, name);
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if (cursor == NULL)
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image = gtk_image_new_from_icon_name ("image-missing", GTK_ICON_SIZE_MENU);
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else
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image = gtk_image_new_from_pixbuf (gdk_cursor_get_image (cursor));
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gtk_widget_set_size_request (image, 24, 24);
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button = gtk_button_new ();
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gtk_container_add (GTK_CONTAINER (button), image);
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gtk_style_context_add_class (gtk_widget_get_style_context (button), "image-button");
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g_signal_connect (button, "clicked", G_CALLBACK (set_cursor), cursor);
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gtk_widget_set_tooltip_text (button, css_name);
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gtk_container_add (GTK_CONTAINER (section), button);
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}
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GtkWidget *
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do_cursors (GtkWidget *do_widget)
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{
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static GtkWidget *window = NULL;
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if (!window)
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{
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GtkWidget *sw;
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GtkWidget *box;
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GtkWidget *section;
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window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
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gtk_window_set_screen (GTK_WINDOW (window),
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gtk_widget_get_screen (do_widget));
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gtk_window_set_title (GTK_WINDOW (window), "Cursors");
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gtk_window_set_default_size (GTK_WINDOW (window), 500, 500);
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g_signal_connect (window, "destroy",
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G_CALLBACK (gtk_widget_destroyed),
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&window);
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sw = gtk_scrolled_window_new (NULL, NULL);
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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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gtk_container_add (GTK_CONTAINER (window), sw);
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box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
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g_object_set (box,
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"margin-start", 20,
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"margin-end", 20,
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"margin-bottom", 10,
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NULL);
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gtk_container_add (GTK_CONTAINER (sw), box);
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section = add_section (box, "General");
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add_button (section, "default");
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add_button (section, "none");
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section = add_section (box, "Link & Status");
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add_button (section, "context-menu");
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add_button (section, "help");
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add_button (section, "pointer");
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add_button (section, "progress");
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add_button (section, "wait");
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section = add_section (box, "Selection");
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add_button (section, "cell");
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add_button (section, "crosshair");
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add_button (section, "text");
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add_button (section, "vertical-text");
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section = add_section (box, "Drag & Drop");
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add_button (section, "alias");
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add_button (section, "copy");
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add_button (section, "move");
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add_button (section, "no-drop");
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add_button (section, "not-allowed");
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add_button (section, "grab");
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add_button (section, "grabbing");
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section = add_section (box, "Resize & Scrolling");
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add_button (section, "all-scroll");
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add_button (section, "col-resize");
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add_button (section, "row-resize");
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add_button (section, "n-resize");
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add_button (section, "e-resize");
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add_button (section, "s-resize");
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add_button (section, "w-resize");
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add_button (section, "ne-resize");
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add_button (section, "nw-resize");
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add_button (section, "se-resize");
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add_button (section, "sw-resize");
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add_button (section, "ew-resize");
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add_button (section, "ns-resize");
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add_button (section, "nesw-resize");
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add_button (section, "nwse-resize");
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section = add_section (box, "Zoom");
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add_button (section, "zoom-in");
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add_button (section, "zoom-out");
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}
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if (!gtk_widget_get_visible (window))
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{
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gtk_widget_show_all (window);
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}
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else
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{
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gtk_widget_destroy (window);
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window = NULL;
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}
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return window;
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}
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@ -86,6 +86,7 @@
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<file>css_multiplebgs.c</file>
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<file>css_pixbufs.c</file>
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<file>css_shadows.c</file>
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<file>cursors.c</file>
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<file>dialog.c</file>
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<file>drawingarea.c</file>
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<file>editable_cells.c</file>
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