mirror of
https://gitlab.gnome.org/GNOME/gtk.git
synced 2024-12-26 21:51:08 +00:00
136 lines
3.0 KiB
C
136 lines
3.0 KiB
C
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#include <gtk/gtk.h>
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struct _GtkBlurBox
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{
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GtkBox parent_instance;
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double radius;
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};
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typedef struct _GtkBlurBox GtkBlurBox;
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struct _GtkBlurBoxClass
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{
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GtkBoxClass parent_class;
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};
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typedef struct _GtkBlurBoxClass GtkBlurBoxClass;
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static GType gtk_blur_box_get_type (void);
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G_DEFINE_TYPE (GtkBlurBox, gtk_blur_box, GTK_TYPE_BOX)
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static void
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snapshot_blur (GtkWidget *widget,
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GtkSnapshot *snapshot)
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{
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GtkBlurBox *box = (GtkBlurBox *) widget;
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gtk_snapshot_push_blur (snapshot, box->radius);
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GTK_WIDGET_CLASS (gtk_blur_box_parent_class)->snapshot (widget, snapshot);
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gtk_snapshot_pop (snapshot);
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}
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static void
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gtk_blur_box_init (GtkBlurBox *box) {
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box->radius = 0;
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}
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static void
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gtk_blur_box_class_init (GtkBlurBoxClass *klass)
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{
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GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
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widget_class->snapshot = snapshot_blur;
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}
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static void
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value_changed_cb (GtkRange *range,
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gpointer user_data)
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{
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GtkBlurBox *box = user_data;
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double value = gtk_range_get_value (range);
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box->radius = value;
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gtk_widget_queue_draw (GTK_WIDGET (box));
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}
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static void
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value_changed_cb2 (GtkRange *range,
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gpointer user_data)
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{
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GtkLabel *label = user_data;
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double value = gtk_range_get_value (range);
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char *text;
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text = g_strdup_printf ("%.2f", value);
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gtk_label_set_label (label, text);
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g_free (text);
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}
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static void
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quit_cb (GtkWidget *widget,
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gpointer data)
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{
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gboolean *done = data;
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*done = TRUE;
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g_main_context_wakeup (NULL);
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}
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int
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main (int argc, char **argv)
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{
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GtkWidget *window;
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GtkWidget *blur_box;
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GtkWidget *scale;
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GtkWidget *value_label;
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gboolean done = FALSE;
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gtk_init ();
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window = gtk_window_new ();
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g_signal_connect (window, "destroy", G_CALLBACK (quit_cb), &done);
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blur_box = g_object_new (gtk_blur_box_get_type (),
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"orientation", GTK_ORIENTATION_VERTICAL,
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"spacing", 32,
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NULL);
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value_label = gtk_label_new ("FF");
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gtk_widget_set_margin_top (value_label, 32);
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{
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PangoAttrList *attrs;
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attrs = pango_attr_list_new ();
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pango_attr_list_insert (attrs, pango_attr_scale_new (6.0));
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gtk_label_set_attributes (GTK_LABEL (value_label), attrs);
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pango_attr_list_unref (attrs);
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}
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gtk_container_add (GTK_CONTAINER (blur_box), value_label);
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scale = gtk_scale_new_with_range (GTK_ORIENTATION_HORIZONTAL, 0, 10, 0.05);
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gtk_widget_set_size_request (scale, 200, -1);
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gtk_widget_set_halign (scale, GTK_ALIGN_CENTER);
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gtk_widget_set_valign (scale, GTK_ALIGN_CENTER);
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gtk_widget_set_hexpand (scale, TRUE);
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g_signal_connect (scale, "value-changed", G_CALLBACK (value_changed_cb), blur_box);
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g_signal_connect (scale, "value-changed", G_CALLBACK (value_changed_cb2), value_label);
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gtk_container_add (GTK_CONTAINER (blur_box), scale);
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gtk_window_set_child (GTK_WINDOW (window), blur_box);
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gtk_widget_show (window);
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while (!done)
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g_main_context_iteration (NULL, TRUE);
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return 0;
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}
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