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clutter/examples/box-layout.c

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/*
* Copyright 2009 Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU Lesser General Public License,
* version 2.1, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
* more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
* Boston, MA 02111-1307, USA.
*
*/
#include <stdlib.h>
#include <clutter/clutter.h>
#define INSTRUCTIONS \
"Press v\t\342\236\236\tSwitch horizontal/vertical\n" \
"Press h\t\342\236\236\tToggle homogeneous\n" \
"Press p\t\342\236\236\tToggle pack start/end\n" \
"Press s\t\342\236\236\tIncrement spacing (up to 12px)\n" \
"Press +\t\342\236\236\tAdd a new actor\n" \
"Press a\t\342\236\236\tToggle animations\n" \
"Press q\t\342\236\236\tQuit"
static const gchar *
get_align_name (ClutterActorAlign align)
{
switch (align)
{
case CLUTTER_ACTOR_ALIGN_FILL:
return "fill";
case CLUTTER_ACTOR_ALIGN_START:
return "start";
case CLUTTER_ACTOR_ALIGN_CENTER:
return "center";
case CLUTTER_ACTOR_ALIGN_END:
return "end";
default:
g_assert_not_reached ();
}
}
static gboolean
button_release_cb (ClutterActor *rect,
ClutterEvent *event,
gpointer user_data)
{
ClutterActorAlign x_align, y_align;
gboolean x_expand, y_expand;
g_object_get (rect,
"x-align", &x_align,
"y-align", &y_align,
"x-expand", &x_expand,
"y-expand", &y_expand,
NULL);
switch (clutter_event_get_button (event))
{
case CLUTTER_BUTTON_PRIMARY:
if (clutter_event_has_shift_modifier (event))
{
if (y_align < 3)
y_align += 1;
else
y_align = 0;
break;
}
else
{
if (x_align < 3)
x_align += 1;
else
x_align = 0;
}
break;
case CLUTTER_BUTTON_SECONDARY:
if (clutter_event_has_shift_modifier (event))
y_expand = !y_expand;
else
x_expand = !x_expand;
break;
default:
break;
}
g_object_set (rect,
"x-align", x_align,
"y-align", y_align,
"x-expand", x_expand,
"y-expand", y_expand,
NULL);
return TRUE;
}
static void
changed_cb (ClutterActor *actor,
GParamSpec *pspec,
ClutterActor *text)
{
ClutterActorAlign x_align, y_align;
gboolean x_expand, y_expand;
gchar *label;
g_object_get (actor,
"x-align", &x_align,
"y-align", &y_align,
"x-expand", &x_expand,
"y-expand", &y_expand,
NULL);
label = g_strdup_printf ("%d,%d\n"
"%s\n%s",
x_expand, y_expand,
get_align_name (x_align),
get_align_name (y_align));
clutter_text_set_text (CLUTTER_TEXT (text), label);
g_free (label);
}
static void
add_actor (ClutterActor *box,
gint position)
{
ClutterActor *rect, *text;
ClutterColor color;
ClutterLayoutManager *layout;
clutter_color_from_hls (&color,
g_random_double_range (0.0, 360.0),
0.5,
0.5);
color.alpha = 255;
layout = clutter_bin_layout_new (CLUTTER_BIN_ALIGNMENT_CENTER,
CLUTTER_BIN_ALIGNMENT_CENTER);
rect = clutter_actor_new ();
clutter_actor_set_layout_manager (rect, layout);
clutter_actor_set_background_color (rect, &color);
clutter_actor_set_reactive (rect, TRUE);
clutter_actor_set_size (rect, 32, 64);
clutter_actor_set_x_expand (rect, TRUE);
clutter_actor_set_y_expand (rect, TRUE);
clutter_actor_set_x_align (rect, CLUTTER_ACTOR_ALIGN_CENTER);
clutter_actor_set_y_align (rect, CLUTTER_ACTOR_ALIGN_CENTER);
text = clutter_text_new_with_text ("Sans 8px", NULL);
clutter_text_set_line_alignment (CLUTTER_TEXT (text),
PANGO_ALIGN_CENTER);
clutter_actor_add_child (rect, text);
g_signal_connect (rect, "button-release-event",
G_CALLBACK (button_release_cb), NULL);
g_signal_connect (rect, "notify::x-expand",
G_CALLBACK (changed_cb), text);
g_signal_connect (rect, "notify::y-expand",
G_CALLBACK (changed_cb), text);
g_signal_connect (rect, "notify::x-align",
G_CALLBACK (changed_cb), text);
g_signal_connect (rect, "notify::y-align",
G_CALLBACK (changed_cb), text);
changed_cb (rect, NULL, text);
clutter_actor_insert_child_at_index (box, rect, position);
}
static gboolean
key_release_cb (ClutterActor *stage,
ClutterEvent *event,
ClutterActor *box)
{
ClutterBoxLayout *layout;
gboolean toggle;
guint spacing;
layout = CLUTTER_BOX_LAYOUT (clutter_actor_get_layout_manager (box));
switch (clutter_event_get_key_symbol (event))
{
case CLUTTER_KEY_a:
{
ClutterActorIter iter;
ClutterActor *child;
clutter_actor_iter_init (&iter, box);
while (clutter_actor_iter_next (&iter, &child))
{
guint duration;
duration = clutter_actor_get_easing_duration (child);
if (duration != 0)
duration = 0;
else
duration = 250;
clutter_actor_set_easing_duration (child, duration);
}
}
break;
case CLUTTER_KEY_v:
{
ClutterOrientation orientation;
orientation = clutter_box_layout_get_orientation (layout);
if (orientation == CLUTTER_ORIENTATION_HORIZONTAL)
orientation = CLUTTER_ORIENTATION_VERTICAL;
else
orientation = CLUTTER_ORIENTATION_HORIZONTAL;
clutter_box_layout_set_orientation (layout, orientation);
}
break;
case CLUTTER_KEY_h:
toggle = clutter_box_layout_get_homogeneous (layout);
clutter_box_layout_set_homogeneous (layout, !toggle);
break;
case CLUTTER_KEY_p:
toggle = clutter_box_layout_get_pack_start (layout);
clutter_box_layout_set_pack_start (layout, !toggle);
break;
case CLUTTER_KEY_s:
spacing = clutter_box_layout_get_spacing (layout);
if (spacing > 12)
spacing = 0;
else
spacing++;
clutter_box_layout_set_spacing (layout, spacing);
break;
case CLUTTER_KEY_plus:
add_actor (box, g_random_int_range (0, clutter_actor_get_n_children (box)));
break;
case CLUTTER_KEY_q:
clutter_main_quit ();
break;
default:
return FALSE;
}
return TRUE;
}
int
main (int argc, char *argv[])
{
ClutterActor *stage, *box, *instructions;
ClutterLayoutManager *layout;
gint i;
if (clutter_init (&argc, &argv) != CLUTTER_INIT_SUCCESS)
return EXIT_FAILURE;
stage = clutter_stage_new ();
clutter_stage_set_title (CLUTTER_STAGE (stage), "Box Layout");
clutter_stage_set_user_resizable (CLUTTER_STAGE (stage), TRUE);
/* make the stage a vbox */
layout = clutter_box_layout_new ();
clutter_box_layout_set_orientation (CLUTTER_BOX_LAYOUT (layout),
CLUTTER_ORIENTATION_VERTICAL);
clutter_actor_set_layout_manager (stage, layout);
box = clutter_actor_new ();
clutter_actor_set_background_color (box, CLUTTER_COLOR_LightGray);
clutter_actor_set_x_expand (box, TRUE);
clutter_actor_set_y_expand (box, TRUE);
layout = clutter_box_layout_new ();
clutter_actor_set_layout_manager (box, layout);
clutter_actor_add_child (stage, box);
instructions = clutter_text_new_with_text ("Sans 12px", INSTRUCTIONS);
clutter_actor_set_x_expand (instructions, TRUE);
clutter_actor_set_y_expand (instructions, FALSE);
clutter_actor_set_x_align (instructions, CLUTTER_ACTOR_ALIGN_START);
clutter_actor_set_margin_top (instructions, 4);
clutter_actor_set_margin_left (instructions, 4);
clutter_actor_set_margin_bottom (instructions, 4);
clutter_actor_add_child (stage, instructions);
for (i = 0; i < 5; i++)
add_actor (box, i);
g_signal_connect (stage, "destroy",
G_CALLBACK (clutter_main_quit), NULL);
g_signal_connect (stage, "key-release-event",
G_CALLBACK (key_release_cb), box);
clutter_actor_show (stage);
clutter_main ();
return EXIT_SUCCESS;
}
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