294 lines
10 KiB
C
294 lines
10 KiB
C
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#include <gtk/gtk.h>
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GtkWidget *hscale, *vscale;
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static void cb_pos_menu_select( GtkWidget *item,
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GtkPositionType pos )
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{
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/* Set the value position on both scale widgets */
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gtk_scale_set_value_pos (GTK_SCALE (hscale), pos);
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gtk_scale_set_value_pos (GTK_SCALE (vscale), pos);
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}
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static void cb_update_menu_select( GtkWidget *item,
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GtkUpdateType policy )
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{
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/* Set the update policy for both scale widgets */
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gtk_range_set_update_policy (GTK_RANGE (hscale), policy);
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gtk_range_set_update_policy (GTK_RANGE (vscale), policy);
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}
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static void cb_digits_scale( GtkAdjustment *adj )
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{
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/* Set the number of decimal places to which adj->value is rounded */
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gtk_scale_set_digits (GTK_SCALE (hscale), (gint) adj->value);
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gtk_scale_set_digits (GTK_SCALE (vscale), (gint) adj->value);
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}
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static void cb_page_size( GtkAdjustment *get,
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GtkAdjustment *set )
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{
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/* Set the page size and page increment size of the sample
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* adjustment to the value specified by the "Page Size" scale */
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set->page_size = get->value;
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set->page_increment = get->value;
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/* This sets the adjustment and makes it emit the "changed" signal to
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reconfigure all the widgets that are attached to this signal. */
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gtk_adjustment_set_value (set, CLAMP (set->value,
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set->lower,
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(set->upper - set->page_size)));
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g_signal_emit_by_name(G_OBJECT(set), "changed");
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}
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static void cb_draw_value( GtkToggleButton *button )
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{
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/* Turn the value display on the scale widgets off or on depending
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* on the state of the checkbutton */
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gtk_scale_set_draw_value (GTK_SCALE (hscale), button->active);
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gtk_scale_set_draw_value (GTK_SCALE (vscale), button->active);
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}
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/* Convenience functions */
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static GtkWidget *make_menu_item ( gchar *name,
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GCallback callback,
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gpointer data )
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{
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GtkWidget *item;
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item = gtk_menu_item_new_with_label (name);
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g_signal_connect (item, "activate",
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callback, (gpointer) data);
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gtk_widget_show (item);
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return item;
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}
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static void scale_set_default_values( GtkScale *scale )
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{
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gtk_range_set_update_policy (GTK_RANGE (scale),
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GTK_UPDATE_CONTINUOUS);
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gtk_scale_set_digits (scale, 1);
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gtk_scale_set_value_pos (scale, GTK_POS_TOP);
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gtk_scale_set_draw_value (scale, TRUE);
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}
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/* makes the sample window */
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static void create_range_controls( void )
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{
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GtkWidget *window;
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GtkWidget *box1, *box2, *box3;
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GtkWidget *button;
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GtkWidget *scrollbar;
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GtkWidget *separator;
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GtkWidget *opt, *menu, *item;
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GtkWidget *label;
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GtkWidget *scale;
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GtkObject *adj1, *adj2;
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/* Standard window-creating stuff */
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window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
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g_signal_connect (window, "destroy",
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G_CALLBACK (gtk_main_quit),
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NULL);
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gtk_window_set_title (GTK_WINDOW (window), "range controls");
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box1 = gtk_vbox_new (FALSE, 0);
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gtk_container_add (GTK_CONTAINER (window), box1);
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gtk_widget_show (box1);
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box2 = gtk_hbox_new (FALSE, 10);
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gtk_container_set_border_width (GTK_CONTAINER (box2), 10);
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gtk_box_pack_start (GTK_BOX (box1), box2, TRUE, TRUE, 0);
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gtk_widget_show (box2);
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/* value, lower, upper, step_increment, page_increment, page_size */
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/* Note that the page_size value only makes a difference for
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* scrollbar widgets, and the highest value you'll get is actually
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* (upper - page_size). */
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adj1 = gtk_adjustment_new (0.0, 0.0, 101.0, 0.1, 1.0, 1.0);
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vscale = gtk_vscale_new (GTK_ADJUSTMENT (adj1));
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scale_set_default_values (GTK_SCALE (vscale));
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gtk_box_pack_start (GTK_BOX (box2), vscale, TRUE, TRUE, 0);
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gtk_widget_show (vscale);
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box3 = gtk_vbox_new (FALSE, 10);
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gtk_box_pack_start (GTK_BOX (box2), box3, TRUE, TRUE, 0);
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gtk_widget_show (box3);
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/* Reuse the same adjustment */
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hscale = gtk_hscale_new (GTK_ADJUSTMENT (adj1));
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gtk_widget_set_size_request (GTK_WIDGET (hscale), 200, -1);
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scale_set_default_values (GTK_SCALE (hscale));
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gtk_box_pack_start (GTK_BOX (box3), hscale, TRUE, TRUE, 0);
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gtk_widget_show (hscale);
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/* Reuse the same adjustment again */
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scrollbar = gtk_hscrollbar_new (GTK_ADJUSTMENT (adj1));
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/* Notice how this causes the scales to always be updated
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* continuously when the scrollbar is moved */
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gtk_range_set_update_policy (GTK_RANGE (scrollbar),
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GTK_UPDATE_CONTINUOUS);
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gtk_box_pack_start (GTK_BOX (box3), scrollbar, TRUE, TRUE, 0);
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gtk_widget_show (scrollbar);
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box2 = gtk_hbox_new (FALSE, 10);
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gtk_container_set_border_width (GTK_CONTAINER (box2), 10);
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gtk_box_pack_start (GTK_BOX (box1), box2, TRUE, TRUE, 0);
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gtk_widget_show (box2);
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/* A checkbutton to control whether the value is displayed or not */
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button = gtk_check_button_new_with_label("Display value on scale widgets");
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gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button), TRUE);
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g_signal_connect (button, "toggled",
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G_CALLBACK (cb_draw_value), NULL);
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gtk_box_pack_start (GTK_BOX (box2), button, TRUE, TRUE, 0);
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gtk_widget_show (button);
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box2 = gtk_hbox_new (FALSE, 10);
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gtk_container_set_border_width (GTK_CONTAINER (box2), 10);
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/* An option menu to change the position of the value */
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label = gtk_label_new ("Scale Value Position:");
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gtk_box_pack_start (GTK_BOX (box2), label, FALSE, FALSE, 0);
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gtk_widget_show (label);
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opt = gtk_option_menu_new ();
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menu = gtk_menu_new ();
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item = make_menu_item ("Top",
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G_CALLBACK (cb_pos_menu_select),
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GINT_TO_POINTER (GTK_POS_TOP));
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gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
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item = make_menu_item ("Bottom", G_CALLBACK (cb_pos_menu_select),
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GINT_TO_POINTER (GTK_POS_BOTTOM));
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gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
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item = make_menu_item ("Left", G_CALLBACK (cb_pos_menu_select),
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GINT_TO_POINTER (GTK_POS_LEFT));
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gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
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item = make_menu_item ("Right", G_CALLBACK (cb_pos_menu_select),
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GINT_TO_POINTER (GTK_POS_RIGHT));
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gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
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gtk_option_menu_set_menu (GTK_OPTION_MENU (opt), menu);
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gtk_box_pack_start (GTK_BOX (box2), opt, TRUE, TRUE, 0);
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gtk_widget_show (opt);
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gtk_box_pack_start (GTK_BOX (box1), box2, TRUE, TRUE, 0);
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gtk_widget_show (box2);
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box2 = gtk_hbox_new (FALSE, 10);
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gtk_container_set_border_width (GTK_CONTAINER (box2), 10);
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/* Yet another option menu, this time for the update policy of the
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* scale widgets */
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label = gtk_label_new ("Scale Update Policy:");
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gtk_box_pack_start (GTK_BOX (box2), label, FALSE, FALSE, 0);
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gtk_widget_show (label);
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opt = gtk_option_menu_new ();
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menu = gtk_menu_new ();
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item = make_menu_item ("Continuous",
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G_CALLBACK (cb_update_menu_select),
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GINT_TO_POINTER (GTK_UPDATE_CONTINUOUS));
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gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
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item = make_menu_item ("Discontinuous",
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G_CALLBACK (cb_update_menu_select),
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GINT_TO_POINTER (GTK_UPDATE_DISCONTINUOUS));
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gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
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item = make_menu_item ("Delayed",
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G_CALLBACK (cb_update_menu_select),
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GINT_TO_POINTER (GTK_UPDATE_DELAYED));
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gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
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gtk_option_menu_set_menu (GTK_OPTION_MENU (opt), menu);
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gtk_box_pack_start (GTK_BOX (box2), opt, TRUE, TRUE, 0);
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gtk_widget_show (opt);
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gtk_box_pack_start (GTK_BOX (box1), box2, TRUE, TRUE, 0);
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gtk_widget_show (box2);
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box2 = gtk_hbox_new (FALSE, 10);
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gtk_container_set_border_width (GTK_CONTAINER (box2), 10);
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/* An HScale widget for adjusting the number of digits on the
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* sample scales. */
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label = gtk_label_new ("Scale Digits:");
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gtk_box_pack_start (GTK_BOX (box2), label, FALSE, FALSE, 0);
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gtk_widget_show (label);
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adj2 = gtk_adjustment_new (1.0, 0.0, 5.0, 1.0, 1.0, 0.0);
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g_signal_connect (adj2, "value_changed",
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G_CALLBACK (cb_digits_scale), NULL);
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scale = gtk_hscale_new (GTK_ADJUSTMENT (adj2));
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gtk_scale_set_digits (GTK_SCALE (scale), 0);
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gtk_box_pack_start (GTK_BOX (box2), scale, TRUE, TRUE, 0);
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gtk_widget_show (scale);
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gtk_box_pack_start (GTK_BOX (box1), box2, TRUE, TRUE, 0);
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gtk_widget_show (box2);
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box2 = gtk_hbox_new (FALSE, 10);
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gtk_container_set_border_width (GTK_CONTAINER (box2), 10);
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/* And, one last HScale widget for adjusting the page size of the
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* scrollbar. */
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label = gtk_label_new ("Scrollbar Page Size:");
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gtk_box_pack_start (GTK_BOX (box2), label, FALSE, FALSE, 0);
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gtk_widget_show (label);
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adj2 = gtk_adjustment_new (1.0, 1.0, 101.0, 1.0, 1.0, 0.0);
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g_signal_connect (adj2, "value-changed",
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G_CALLBACK (cb_page_size), (gpointer) adj1);
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scale = gtk_hscale_new (GTK_ADJUSTMENT (adj2));
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gtk_scale_set_digits (GTK_SCALE (scale), 0);
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gtk_box_pack_start (GTK_BOX (box2), scale, TRUE, TRUE, 0);
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gtk_widget_show (scale);
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gtk_box_pack_start (GTK_BOX (box1), box2, TRUE, TRUE, 0);
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gtk_widget_show (box2);
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separator = gtk_hseparator_new ();
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gtk_box_pack_start (GTK_BOX (box1), separator, FALSE, TRUE, 0);
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gtk_widget_show (separator);
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box2 = gtk_vbox_new (FALSE, 10);
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gtk_container_set_border_width (GTK_CONTAINER (box2), 10);
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gtk_box_pack_start (GTK_BOX (box1), box2, FALSE, TRUE, 0);
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gtk_widget_show (box2);
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button = gtk_button_new_with_label ("Quit");
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g_signal_connect_swapped (button, "clicked",
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G_CALLBACK (gtk_main_quit),
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NULL);
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gtk_box_pack_start (GTK_BOX (box2), button, TRUE, TRUE, 0);
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gtk_widget_set_can_default (button, TRUE);
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gtk_widget_grab_default (button);
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gtk_widget_show (button);
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gtk_widget_show (window);
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}
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int main( int argc,
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char *argv[] )
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{
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gtk_init (&argc, &argv);
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create_range_controls ();
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gtk_main ();
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return 0;
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}
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