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#include <gtk/gtk.h>
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
label_flip_changed (GtkComboBox *combo_box,
GtkLabel *label)
{
gint active = gtk_combo_box_get_active (combo_box);
if (active == 0)
gtk_label_set_angle (label, 0.0);
else
gtk_label_set_angle (label, 90.0);
}
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
scrollable_policy (void)
{
GtkWidget *window, *swindow, *hbox, *vbox, *frame, *cntl;
GtkWidget *viewport, *label, *expander, *widget;
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 2);
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 6);
gtk_container_set_border_width (GTK_CONTAINER (window), 8);
gtk_widget_show (vbox);
gtk_widget_show (hbox);
gtk_container_add (GTK_CONTAINER (window), hbox);
gtk_box_pack_start (GTK_BOX (hbox), vbox, FALSE, FALSE, 0);
frame = gtk_frame_new ("Scrolled Window");
gtk_widget_show (frame);
gtk_box_pack_start (GTK_BOX (hbox), frame, TRUE, TRUE, 0);
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_container_add (GTK_CONTAINER (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_line_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_container_add (GTK_CONTAINER (viewport), label);
gtk_container_add (GTK_CONTAINER (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_box_pack_start (GTK_BOX (vbox), expander, FALSE, FALSE, 0);
/* 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_show (widget);
gtk_box_pack_start (GTK_BOX (hbox), widget, TRUE, TRUE, 0);
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_show (widget);
gtk_box_pack_start (GTK_BOX (hbox), widget, TRUE, TRUE, 0);
gtk_box_pack_start (GTK_BOX (cntl), hbox, FALSE, FALSE, 0);
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_show (widget);
gtk_box_pack_start (GTK_BOX (hbox), widget, TRUE, TRUE, 0);
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_show (widget);
gtk_box_pack_start (GTK_BOX (hbox), widget, TRUE, TRUE, 0);
gtk_box_pack_start (GTK_BOX (cntl), hbox, FALSE, FALSE, 0);
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_show (widget);
gtk_box_pack_start (GTK_BOX (hbox), widget, TRUE, TRUE, 0);
widget = gtk_spin_button_new_with_range (100.0, 1000.0, 10.0);
gtk_box_pack_start (GTK_BOX (hbox), widget, TRUE, TRUE, 0);
gtk_box_pack_start (GTK_BOX (cntl), hbox, FALSE, FALSE, 0);
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_show (widget);
gtk_box_pack_start (GTK_BOX (hbox), widget, TRUE, TRUE, 0);
widget = gtk_spin_button_new_with_range (100.0, 1000.0, 10.0);
gtk_box_pack_start (GTK_BOX (hbox), widget, TRUE, TRUE, 0);
gtk_box_pack_start (GTK_BOX (cntl), hbox, FALSE, FALSE, 0);
gtk_widget_show (widget);
gtk_widget_show (hbox);
g_signal_connect (G_OBJECT (widget), "value-changed",
G_CALLBACK (content_height_changed), swindow);
/* Add Label orientation control here */
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 2);
gtk_widget_show (hbox);
widget = gtk_label_new ("label-flip");
gtk_widget_show (widget);
gtk_box_pack_start (GTK_BOX (hbox), widget, TRUE, TRUE, 0);
widget = gtk_combo_box_text_new ();
gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (widget), "Horizontal");
gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (widget), "Vertical");
gtk_combo_box_set_active (GTK_COMBO_BOX (widget), 0);
gtk_widget_show (widget);
gtk_box_pack_start (GTK_BOX (hbox), widget, TRUE, TRUE, 0);
gtk_box_pack_start (GTK_BOX (cntl), hbox, FALSE, FALSE, 0);
g_signal_connect (G_OBJECT (widget), "changed",
G_CALLBACK (label_flip_changed), label);
/* Add Kinetic scrolling control here */
widget = gtk_check_button_new_with_label ("Kinetic scrolling");
gtk_widget_show (widget);
gtk_box_pack_start (GTK_BOX (cntl), widget, TRUE, TRUE, 0);
g_signal_connect (G_OBJECT (widget), "toggled",
G_CALLBACK (kinetic_scrolling_changed), swindow);
gtk_widget_show (window);
}
int
main (int argc, char *argv[])
{
gtk_init (NULL, NULL);
scrollable_policy ();
gtk_main ();
return 0;
}
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