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/* Fixed layout
*
* GtkFixed is a container that allows placing and transforming
* widgets manually.
*/
#include <gtk/gtk.h>
/* This enumeration determines the paint order */
enum {
FACE_BACK,
FACE_LEFT,
FACE_BOTTOM,
FACE_RIGHT,
FACE_TOP,
FACE_FRONT,
N_FACES
};
/* Map face widgets to CSS classes */
static struct {
GtkWidget *face;
const char *css_class;
} faces[N_FACES] = {
[FACE_BACK] = { NULL, "back", },
[FACE_LEFT] = { NULL, "left", },
[FACE_RIGHT] = { NULL, "right", },
[FACE_TOP] = { NULL, "top", },
[FACE_BOTTOM] = { NULL, "bottom", },
[FACE_FRONT] = { NULL, "front", },
};
static GtkWidget *
create_faces (void)
{
GtkWidget *fixed = gtk_fixed_new ();
int face_size = 200;
float w, h, d, p;
gtk_widget_set_overflow (fixed, GTK_OVERFLOW_VISIBLE);
w = (float) face_size / 2.f;
h = (float) face_size / 2.f;
d = (float) face_size / 2.f;
p = face_size * 3.f;
for (int i = 0; i < N_FACES; i++)
{
GskTransform *transform = NULL;
/* Add a face */
faces[i].face = gtk_frame_new (NULL);
gtk_widget_set_size_request (faces[i].face, face_size, face_size);
gtk_widget_add_css_class (faces[i].face, faces[i].css_class);
gtk_container_add (GTK_CONTAINER (fixed), faces[i].face);
/* Set up the transformation for each face */
transform = gsk_transform_translate (transform, &GRAPHENE_POINT_INIT (w, h));
transform = gsk_transform_perspective (transform, p);
transform = gsk_transform_rotate_3d (transform, -30.f, graphene_vec3_x_axis ());
transform = gsk_transform_rotate_3d (transform, 135.f, graphene_vec3_y_axis ());
transform = gsk_transform_translate_3d (transform, &GRAPHENE_POINT3D_INIT (0, 0, -face_size / 6.f));
switch (i)
{
case FACE_FRONT:
transform = gsk_transform_rotate_3d (transform, 0.f, graphene_vec3_y_axis ());
break;
case FACE_BACK:
transform = gsk_transform_rotate_3d (transform, -180.f, graphene_vec3_y_axis ());
break;
case FACE_RIGHT:
transform = gsk_transform_rotate_3d (transform, 90.f, graphene_vec3_y_axis ());
break;
case FACE_LEFT:
transform = gsk_transform_rotate_3d (transform, -90.f, graphene_vec3_y_axis ());
break;
case FACE_TOP:
transform = gsk_transform_rotate_3d (transform, 90.f, graphene_vec3_x_axis ());
break;
case FACE_BOTTOM:
transform = gsk_transform_rotate_3d (transform, -90.f, graphene_vec3_x_axis ());
break;
default:
break;
}
transform = gsk_transform_translate_3d (transform, &GRAPHENE_POINT3D_INIT (0, 0, d));
transform = gsk_transform_translate_3d (transform, &GRAPHENE_POINT3D_INIT (-w, -h, 0));
gtk_fixed_set_child_transform (GTK_FIXED (fixed), faces[i].face, transform);
gsk_transform_unref (transform);
}
return fixed;
}
static GtkWidget *demo_window = NULL;
static GtkCssProvider *provider = NULL;
static void
close_window (GtkWidget *widget)
{
/* Reset the state */
for (int i = 0; i < N_FACES; i++)
faces[i].face = NULL;
gtk_style_context_remove_provider_for_display (gdk_display_get_default (),
GTK_STYLE_PROVIDER (provider));
provider = NULL;
demo_window = NULL;
}
static GtkWidget *
create_demo_window (GtkWidget *do_widget)
{
GtkWidget *window, *sw, *fixed, *cube;
window = gtk_window_new ();
gtk_window_set_display (GTK_WINDOW (window), gtk_widget_get_display (do_widget));
gtk_window_set_title (GTK_WINDOW (window), "Fixed layout");
gtk_window_set_default_size (GTK_WINDOW (window), 600, 400);
g_signal_connect (window, "destroy", G_CALLBACK (close_window), NULL);
sw = gtk_scrolled_window_new (NULL, NULL);
gtk_window_set_child (GTK_WINDOW (window), sw);
fixed = gtk_fixed_new ();
gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), fixed);
gtk_widget_set_halign (GTK_WIDGET (fixed), GTK_ALIGN_CENTER);
gtk_widget_set_valign (GTK_WIDGET (fixed), GTK_ALIGN_CENTER);
cube = create_faces ();
gtk_container_add (GTK_CONTAINER (fixed), cube);
gtk_widget_set_overflow (fixed, GTK_OVERFLOW_VISIBLE);
provider = gtk_css_provider_new ();
gtk_css_provider_load_from_resource (provider, "/fixed/fixed.css");
gtk_style_context_add_provider_for_display (gdk_display_get_default (),
GTK_STYLE_PROVIDER (provider),
800);
g_object_unref (provider);
return window;
}
GtkWidget*
do_fixed (GtkWidget *do_widget)
{
if (demo_window == NULL)
demo_window = create_demo_window (do_widget);
if (!gtk_widget_get_visible (demo_window))
gtk_widget_show (demo_window);
else
gtk_widget_destroy (demo_window);
return demo_window;
}
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