#include static void horizontal_policy_changed (GtkComboBox *combo_box, GtkViewport *viewport) { GtkScrollablePolicy policy = gtk_combo_box_get_active (combo_box); gtk_scrollable_set_hscroll_policy (GTK_SCROLLABLE (viewport), policy); } static void vertical_policy_changed (GtkComboBox *combo_box, GtkViewport *viewport) { GtkScrollablePolicy policy = gtk_combo_box_get_active (combo_box); gtk_scrollable_set_vscroll_policy (GTK_SCROLLABLE (viewport), policy); } static void content_width_changed (GtkSpinButton *spin_button, gpointer data) { GtkScrolledWindow *swindow = data; gdouble value; value = gtk_spin_button_get_value (spin_button); gtk_scrolled_window_set_min_content_width (swindow, (gint)value); } static void content_height_changed (GtkSpinButton *spin_button, gpointer data) { GtkScrolledWindow *swindow = data; gdouble value; value = gtk_spin_button_get_value (spin_button); gtk_scrolled_window_set_min_content_height (swindow, (gint)value); } static void kinetic_scrolling_changed (GtkToggleButton *toggle_button, gpointer data) { GtkScrolledWindow *swindow = data; gboolean enabled = gtk_toggle_button_get_active (toggle_button); gtk_scrolled_window_set_kinetic_scrolling (swindow, enabled); } static void add_row (GtkButton *button, GtkListBox *listbox) { GtkWidget *row; row = g_object_new (GTK_TYPE_LIST_BOX_ROW, NULL); gtk_container_add (GTK_CONTAINER (row), gtk_label_new ("test")); gtk_container_add (GTK_CONTAINER (listbox), row); } static void remove_row (GtkButton *button, GtkListBox *listbox) { GList *children, *last; children = gtk_container_get_children (GTK_CONTAINER (listbox)); last = g_list_last (children); if (last) gtk_container_remove (GTK_CONTAINER (listbox), last->data); g_list_free (children); } static void scrollable_policy (void) { GtkWidget *window, *swindow, *hbox, *vbox, *frame, *cntl, *listbox; GtkWidget *viewport, *label, *expander, *widget, *popover; window = gtk_window_new (); hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 2); vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 6); gtk_widget_show (vbox); gtk_widget_show (hbox); gtk_window_set_child (GTK_WINDOW (window), hbox); gtk_container_add (GTK_CONTAINER (hbox), vbox); frame = gtk_frame_new ("Scrolled Window"); gtk_widget_set_hexpand (frame, TRUE); gtk_container_add (GTK_CONTAINER (hbox), frame); swindow = gtk_scrolled_window_new (NULL, NULL); gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (swindow), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC); gtk_widget_show (swindow); gtk_frame_set_child (GTK_FRAME (frame), swindow); viewport = gtk_viewport_new (NULL, NULL); label = gtk_label_new ("Here is a wrapping label with a minimum width-chars of 40 and " "a natural max-width-chars of 100 to demonstrate the usage of " "scrollable widgets \"hscroll-policy\" and \"vscroll-policy\" " "properties. Note also that when playing with the window height, " "one can observe that the vscrollbar disappears as soon as there " "is enough height to fit the content vertically if the window were " "to be allocated a width without a vscrollbar present"); gtk_label_set_wrap (GTK_LABEL (label), TRUE); gtk_label_set_width_chars (GTK_LABEL (label), 40); gtk_label_set_max_width_chars (GTK_LABEL (label), 100); gtk_widget_show (label); gtk_widget_show (viewport); gtk_viewport_set_child (GTK_VIEWPORT (viewport), label); gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (swindow), viewport); /* Add controls here */ expander = gtk_expander_new ("Controls"); gtk_expander_set_expanded (GTK_EXPANDER (expander), TRUE); cntl = gtk_box_new (GTK_ORIENTATION_VERTICAL, 2); gtk_widget_show (cntl); gtk_widget_show (expander); gtk_container_add (GTK_CONTAINER (expander), cntl); gtk_container_add (GTK_CONTAINER (vbox), expander); /* Add Horizontal policy control here */ hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 2); gtk_widget_show (hbox); widget = gtk_label_new ("hscroll-policy"); gtk_widget_set_hexpand (widget, TRUE); gtk_container_add (GTK_CONTAINER (hbox), widget); widget = gtk_combo_box_text_new (); gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (widget), "Minimum"); gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (widget), "Natural"); gtk_combo_box_set_active (GTK_COMBO_BOX (widget), 0); gtk_widget_set_hexpand (widget, TRUE); gtk_container_add (GTK_CONTAINER (hbox), widget); gtk_container_add (GTK_CONTAINER (cntl), hbox); g_signal_connect (G_OBJECT (widget), "changed", G_CALLBACK (horizontal_policy_changed), viewport); /* Add Vertical policy control here */ hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 2); gtk_widget_show (hbox); widget = gtk_label_new ("vscroll-policy"); gtk_widget_set_hexpand (widget, TRUE); gtk_container_add (GTK_CONTAINER (hbox), widget); widget = gtk_combo_box_text_new (); gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (widget), "Minimum"); gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (widget), "Natural"); gtk_combo_box_set_active (GTK_COMBO_BOX (widget), 0); gtk_widget_set_hexpand (widget, TRUE); gtk_container_add (GTK_CONTAINER (hbox), widget); gtk_container_add (GTK_CONTAINER (cntl), hbox); g_signal_connect (G_OBJECT (widget), "changed", G_CALLBACK (vertical_policy_changed), viewport); /* Content size controls */ hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 2); widget = gtk_label_new ("min-content-width"); gtk_widget_set_hexpand (widget, TRUE); gtk_container_add (GTK_CONTAINER (hbox), widget); widget = gtk_spin_button_new_with_range (100.0, 1000.0, 10.0); gtk_widget_set_hexpand (widget, TRUE); gtk_container_add (GTK_CONTAINER (hbox), widget); gtk_container_add (GTK_CONTAINER (cntl), hbox); gtk_widget_show (widget); gtk_widget_show (hbox); g_signal_connect (G_OBJECT (widget), "value-changed", G_CALLBACK (content_width_changed), swindow); hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 2); widget = gtk_label_new ("min-content-height"); gtk_widget_set_hexpand (widget, TRUE); gtk_container_add (GTK_CONTAINER (hbox), widget); widget = gtk_spin_button_new_with_range (100.0, 1000.0, 10.0); gtk_widget_set_hexpand (widget, TRUE); gtk_container_add (GTK_CONTAINER (hbox), widget); gtk_container_add (GTK_CONTAINER (cntl), hbox); gtk_widget_show (widget); gtk_widget_show (hbox); g_signal_connect (G_OBJECT (widget), "value-changed", G_CALLBACK (content_height_changed), swindow); /* Add Kinetic scrolling control here */ widget = gtk_check_button_new_with_label ("Kinetic scrolling"); gtk_widget_set_hexpand (widget, TRUE); gtk_container_add (GTK_CONTAINER (cntl), widget); g_signal_connect (G_OBJECT (widget), "toggled", G_CALLBACK (kinetic_scrolling_changed), swindow); gtk_widget_show (window); /* Popover */ popover = gtk_popover_new (); widget = gtk_menu_button_new (); gtk_menu_button_set_popover (GTK_MENU_BUTTON (widget), popover); gtk_menu_button_set_label (GTK_MENU_BUTTON (widget), "Popover"); gtk_container_add (GTK_CONTAINER (cntl), widget); vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 6); gtk_popover_set_child (GTK_POPOVER (popover), vbox); /* Popover's scrolled window */ swindow = gtk_scrolled_window_new (NULL, NULL); gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (swindow), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC); gtk_container_add (GTK_CONTAINER (vbox), swindow); /* Listbox */ listbox = gtk_list_box_new (); gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (swindow), listbox); gtk_widget_show (listbox); /* Min content */ hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 2); widget = gtk_label_new ("min-content-width"); gtk_widget_set_hexpand (widget, TRUE); gtk_container_add (GTK_CONTAINER (hbox), widget); widget = gtk_spin_button_new_with_range (0.0, 150.0, 10.0); gtk_widget_set_hexpand (widget, TRUE); gtk_container_add (GTK_CONTAINER (hbox), widget); g_object_bind_property (gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (widget)), "value", swindow, "min-content-width", G_BINDING_DEFAULT | G_BINDING_SYNC_CREATE); widget = gtk_label_new ("min-content-height"); gtk_widget_set_hexpand (widget, TRUE); gtk_container_add (GTK_CONTAINER (hbox), widget); widget = gtk_spin_button_new_with_range (0.0, 150.0, 10.0); gtk_widget_set_hexpand (widget, TRUE); gtk_container_add (GTK_CONTAINER (hbox), widget); gtk_container_add (GTK_CONTAINER (vbox), hbox); g_object_bind_property (gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (widget)), "value", swindow, "min-content-height", G_BINDING_DEFAULT | G_BINDING_SYNC_CREATE); /* Max content */ hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 2); widget = gtk_label_new ("max-content-width"); gtk_widget_set_hexpand (widget, TRUE); gtk_container_add (GTK_CONTAINER (hbox), widget); widget = gtk_spin_button_new_with_range (250.0, 1000.0, 10.0); gtk_widget_set_hexpand (widget, TRUE); gtk_container_add (GTK_CONTAINER (hbox), widget); g_object_bind_property (gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (widget)), "value", swindow, "max-content-width", G_BINDING_DEFAULT | G_BINDING_SYNC_CREATE); widget = gtk_label_new ("max-content-height"); gtk_widget_set_hexpand (widget, TRUE); gtk_container_add (GTK_CONTAINER (hbox), widget); widget = gtk_spin_button_new_with_range (250.0, 1000.0, 10.0); gtk_widget_set_hexpand (widget, TRUE); gtk_container_add (GTK_CONTAINER (hbox), widget); gtk_container_add (GTK_CONTAINER (vbox), hbox); g_object_bind_property (gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (widget)), "value", swindow, "max-content-height", G_BINDING_DEFAULT | G_BINDING_SYNC_CREATE); /* Add and Remove buttons */ hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 2); widget = gtk_button_new_with_label ("Remove"); gtk_widget_set_hexpand (widget, TRUE); gtk_container_add (GTK_CONTAINER (hbox), widget); g_signal_connect (widget, "clicked", G_CALLBACK (remove_row), listbox); widget = gtk_button_new_with_label ("Add"); gtk_widget_set_hexpand (widget, TRUE); gtk_container_add (GTK_CONTAINER (hbox), widget); gtk_container_add (GTK_CONTAINER (vbox), hbox); g_signal_connect (widget, "clicked", G_CALLBACK (add_row), listbox); } int main (int argc, char *argv[]) { gtk_init (); scrollable_policy (); while (TRUE) g_main_context_iteration (NULL, TRUE); return 0; }