/*
* Experiment with permutations of layout properties for a ClutterBoxLayout
*
* See the text (in brackets) at the bottom of the application
* window for available key presses
*/
#include <stdlib.h>
#include <clutter/clutter.h>
#define STAGE_SIDE 510
#define BOX_SIDE STAGE_SIDE * 0.75
#define RED_SIDE STAGE_SIDE / 4
#define GREEN_SIDE STAGE_SIDE / 8
#define BLUE_SIDE STAGE_SIDE / 16
typedef struct
{
ClutterLayoutManager *box_layout;
ClutterActor *box;
ClutterActor *status_display;
gboolean x_fill;
gboolean y_fill;
gboolean expand;
ClutterBoxAlignment x_align;
ClutterBoxAlignment y_align;
} State;
static const ClutterColor stage_color = { 0x33, 0x33, 0x55, 0xff };
static const ClutterColor box_color = { 0x66, 0x66, 0x00, 0xff };
static const ClutterColor red_color = { 0xff, 0x00, 0x00, 0xff };
static const ClutterColor green_color = { 0x00, 0xff, 0x00, 0xff };
static const ClutterColor blue_color = { 0x00, 0x00, 0xff, 0xff };
static const ClutterColor white_color = { 0xff, 0xff, 0xff, 0xff };
static GValue
gboolean_to_gvalue (gboolean value)
{
GValue gval = {0};
g_value_init (&gval, G_TYPE_BOOLEAN);
g_value_set_boolean (&gval, value);
return gval;
}
static GValue
alignment_to_gvalue (ClutterBoxAlignment value)
{
GValue gval = {0};
g_value_init (&gval, G_TYPE_INT);
g_value_set_int (&gval, value);
return gval;
}
static gchar*
alignment_as_string (ClutterBoxAlignment value)
{
gchar *align_string = "start ";
switch (value)
{
case CLUTTER_BOX_ALIGNMENT_CENTER:
align_string = "center";
break;
case CLUTTER_BOX_ALIGNMENT_END:
align_string = "end ";
break;
case CLUTTER_BOX_ALIGNMENT_START:
align_string = "start ";
break;
}
return align_string;
}
static ClutterBoxAlignment
get_next_alignment (ClutterBoxAlignment alignment)
{
alignment++;
if (alignment > CLUTTER_BOX_ALIGNMENT_CENTER)
alignment = CLUTTER_BOX_ALIGNMENT_START;
return alignment;
}
static void
show_status (State *state)
{
ClutterText *text = CLUTTER_TEXT (state->status_display);
ClutterBoxLayout *box_layout = CLUTTER_BOX_LAYOUT (state->box_layout);
gboolean homogeneous = clutter_box_layout_get_homogeneous (box_layout);
gboolean vertical = clutter_box_layout_get_vertical (box_layout);
gchar *message = g_strdup_printf ("x_fill (x): %s\t\t\t"
"y_fill (y): %s\n"
"expand (e): %s\t\t"
"homogeneous (h): %s\n"
"spacing (+/-): %dpx\t\t"
"vertical (v): %s\n"
"x_align (right): %s\t"
"y_align (up): %s",
(state->x_fill ? "true" : "false"),
(state->y_fill ? "true" : "false"),
(state->expand ? "true" : "false"),
(homogeneous ? "true" : "false"),
clutter_box_layout_get_spacing (box_layout),
(vertical ? "true" : "false"),
alignment_as_string (state->x_align),
alignment_as_string (state->y_align));
clutter_text_set_text (text, message);
g_free (message);
}
static void
set_property_on_layout_children (State *state,
const gchar *property,
GValue value)
{
ClutterActor *actor;
ClutterContainer *container = CLUTTER_CONTAINER (state->box);
ClutterLayoutManager *manager = CLUTTER_LAYOUT_MANAGER (state->box_layout);
GList *actors = clutter_container_get_children (container);
for (; actors; actors = actors->next)
{
actor = CLUTTER_ACTOR (actors->data);
clutter_layout_manager_child_set_property (manager,
container,
actor,
property,
&value);
}
g_list_free (actors);
}
static void
toggle_x_fill (GObject *instance,
const gchar *action_name,
guint key_val,
ClutterModifierType modifiers,
gpointer user_data)
{
State *state = (State *) user_data;
state->x_fill = !state->x_fill;
set_property_on_layout_children (state,
"x-fill",
gboolean_to_gvalue (state->x_fill));
}
static void
toggle_y_fill (GObject *instance,
const gchar *action_name,
guint key_val,
ClutterModifierType modifiers,
gpointer user_data)
{
State *state = (State *) user_data;
state->y_fill = !state->y_fill;
set_property_on_layout_children (state,
"y-fill",
gboolean_to_gvalue (state->y_fill));
}
static void
toggle_expand (GObject *instance,
const gchar *action_name,
guint key_val,
ClutterModifierType modifiers,
gpointer user_data)
{
State *state = (State *) user_data;
state->expand = !state->expand;
set_property_on_layout_children (state,
"expand",
gboolean_to_gvalue (state->expand));
}
static void
rotate_x_alignment (GObject *instance,
const gchar *action_name,
guint key_val,
ClutterModifierType modifiers,
gpointer user_data)
{
State *state = (State *) user_data;
state->x_align = get_next_alignment (state->x_align);
set_property_on_layout_children (state,
"x-align",
alignment_to_gvalue (state->x_align));
}
static void
rotate_y_alignment (GObject *instance,
const gchar *action_name,
guint key_val,
ClutterModifierType modifiers,
gpointer user_data)
{
State *state = (State *) user_data;
state->y_align = get_next_alignment (state->y_align);
set_property_on_layout_children (state,
"y-align",
alignment_to_gvalue (state->y_align));
}
static void
toggle_vertical (GObject *instance,
const gchar *action_name,
guint key_val,
ClutterModifierType modifiers,
gpointer user_data)
{
State *state = (State *) user_data;
ClutterBoxLayout *box_layout = CLUTTER_BOX_LAYOUT (state->box_layout);
gboolean vertical = clutter_box_layout_get_vertical (box_layout);
clutter_box_layout_set_vertical (box_layout, !vertical);
}
static void
toggle_homogeneous (GObject *instance,
const gchar *action_name,
guint key_val,
ClutterModifierType modifiers,
gpointer user_data)
{
State *state = (State *) user_data;
ClutterBoxLayout *box_layout = CLUTTER_BOX_LAYOUT (state->box_layout);
gboolean homogeneous = clutter_box_layout_get_homogeneous (box_layout);
clutter_box_layout_set_homogeneous (box_layout, !homogeneous);
}
static void
increase_spacing (GObject *instance,
const gchar *action_name,
guint key_val,
ClutterModifierType modifiers,
gpointer user_data)
{
State *state = (State *) user_data;
ClutterBoxLayout *box_layout = CLUTTER_BOX_LAYOUT (state->box_layout);
guint spacing = clutter_box_layout_get_spacing (box_layout) + 5;
clutter_box_layout_set_spacing (box_layout, spacing);
}
static void
decrease_spacing (GObject *instance,
const gchar *action_name,
guint key_val,
ClutterModifierType modifiers,
gpointer user_data)
{
State *state = (State *) user_data;
ClutterBoxLayout *box_layout = CLUTTER_BOX_LAYOUT (state->box_layout);
guint spacing = clutter_box_layout_get_spacing (box_layout);
if (spacing >= 5)
clutter_box_layout_set_spacing (box_layout, spacing - 5);
}
static gboolean
key_pressed_cb (ClutterActor *actor,
ClutterEvent *event,
gpointer user_data)
{
State *state = (State *) user_data;
ClutterBindingPool *pool;
gboolean return_value;
pool = clutter_binding_pool_find (G_OBJECT_TYPE_NAME (actor));
return_value = clutter_binding_pool_activate (pool,
clutter_event_get_key_symbol (event),
clutter_event_get_state (event),
G_OBJECT (actor));
show_status (state);
return return_value;
}
int
main (int argc,
char *argv[])
{
ClutterActor *stage;
GObjectClass *stage_class;
ClutterBindingPool *binding_pool;
ClutterActor *red;
ClutterActor *green;
ClutterActor *blue;
State *state = g_new0 (State, 1);
if (clutter_init (&argc, &argv) != CLUTTER_INIT_SUCCESS)
return 1;
state->x_fill = FALSE;
state->y_fill = FALSE;
state->expand = FALSE;
state->x_align = CLUTTER_BOX_ALIGNMENT_START;
stage = clutter_stage_new ();
clutter_actor_set_size (stage, STAGE_SIDE, STAGE_SIDE);
clutter_stage_set_color (CLUTTER_STAGE (stage), &stage_color);
g_signal_connect (stage, "destroy", G_CALLBACK (clutter_main_quit), NULL);
/* for key bindings */
stage_class = G_OBJECT_GET_CLASS (stage);
binding_pool = clutter_binding_pool_get_for_class (stage_class);
clutter_binding_pool_install_action (binding_pool,
"toggle-expand",
CLUTTER_KEY_e,
0,
G_CALLBACK (toggle_expand),
state,
NULL);
clutter_binding_pool_install_action (binding_pool,
"toggle-x-fill",
CLUTTER_KEY_x,
0,
G_CALLBACK (toggle_x_fill),
state,
NULL);
clutter_binding_pool_install_action (binding_pool,
"toggle-y-fill",
CLUTTER_KEY_y,
0,
G_CALLBACK (toggle_y_fill),
state,
NULL);
clutter_binding_pool_install_action (binding_pool,
"toggle-vertical",
CLUTTER_KEY_v,
0,
G_CALLBACK (toggle_vertical),
state,
NULL);
clutter_binding_pool_install_action (binding_pool,
"toggle-homogeneous",
CLUTTER_KEY_h,
0,
G_CALLBACK (toggle_homogeneous),
state,
NULL);
clutter_binding_pool_install_action (binding_pool,
"rotate-x-alignment",
CLUTTER_KEY_Right,
0,
G_CALLBACK (rotate_x_alignment),
state,
NULL);
clutter_binding_pool_install_action (binding_pool,
"rotate-y-alignment",
CLUTTER_KEY_Up,
0,
G_CALLBACK (rotate_y_alignment),
state,
NULL);
clutter_binding_pool_install_action (binding_pool,
"increase-spacing",
CLUTTER_KEY_plus,
CLUTTER_SHIFT_MASK,
G_CALLBACK (increase_spacing),
state,
NULL);
clutter_binding_pool_install_action (binding_pool,
"decrease-spacing",
CLUTTER_KEY_minus,
0,
G_CALLBACK (decrease_spacing),
state,
NULL);
/* rectangles inside the layout */
red = clutter_rectangle_new_with_color (&red_color);
clutter_actor_set_size (red, RED_SIDE, RED_SIDE);
green = clutter_rectangle_new_with_color (&green_color);
clutter_actor_set_size (green, GREEN_SIDE, GREEN_SIDE);
blue = clutter_rectangle_new_with_color (&blue_color);
clutter_actor_set_size (blue, BLUE_SIDE, BLUE_SIDE);
/* the layout */
state->box_layout = clutter_box_layout_new ();
clutter_box_layout_set_use_animations (CLUTTER_BOX_LAYOUT (state->box_layout),
TRUE);
state->box = clutter_box_new (state->box_layout);
clutter_box_set_color (CLUTTER_BOX (state->box), &box_color);
clutter_actor_set_size (state->box, BOX_SIDE, BOX_SIDE);
clutter_actor_add_constraint (state->box,
clutter_align_constraint_new (stage, CLUTTER_ALIGN_X_AXIS, 0.5));
clutter_actor_add_constraint (state->box,
clutter_align_constraint_new (stage, CLUTTER_ALIGN_Y_AXIS, 0.1));
/* text to show status */
state->status_display = clutter_text_new ();
clutter_text_set_color (CLUTTER_TEXT (state->status_display), &white_color);
clutter_actor_set_size (state->status_display,
STAGE_SIDE,
STAGE_SIDE * 0.2);
clutter_actor_set_position (state->status_display,
(STAGE_SIDE - BOX_SIDE) / 2,
STAGE_SIDE * 0.8);
/* set text for initial state */
show_status (state);
/* connect key presses to a callback on the binding pool */
g_signal_connect (stage,
"key-press-event",
G_CALLBACK (key_pressed_cb),
state);
/* pack UI */
clutter_container_add (CLUTTER_CONTAINER (state->box), red, green, blue, NULL);
clutter_container_add (CLUTTER_CONTAINER (stage),
state->box,
state->status_display,
NULL);
/* show stage */
clutter_actor_show (stage);
clutter_main ();
/* clean up */
g_object_unref (binding_pool);
g_free (state);
return EXIT_SUCCESS;
}