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examples: Add a grid-layout example
A fairly complete example for ClutterGridLayout https://bugzilla.gnome.org/show_bug.cgi?id=677372
This commit is contained in:
Bastian Winkler
parent
1eb869ec8f
commit
dae25d839e
@ -9,6 +9,7 @@ all_examples = \
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drop-action \
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easing-modes \
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flow-layout \
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grid-layout \
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layout-manager \
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rounded-rectangle \
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scroll-actor \
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386
examples/grid-layout.c
Normal file
386
examples/grid-layout.c
Normal file
@ -0,0 +1,386 @@
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/*
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* Copyright 2012 Bastian Winkler <buz@netbuz.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU Lesser General Public License,
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* version 2.1, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
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* more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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* Boston, MA 02111-1307, USA.
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*
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*/
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#include <stdlib.h>
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#include <clutter/clutter.h>
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#define INSTRUCTIONS \
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"Press r\t\342\236\236\tSwitch row homogeneous\n" \
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"Press c\t\342\236\236\tSwitch column homogeneous\n" \
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"Press s\t\342\236\236\tIncrement spacing (up to 12px)\n" \
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"Press a\t\342\236\236\tSwitch animations on/off\n" \
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"Press q\t\342\236\236\tQuit\n\n" \
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"Left/right click\t\t\342\236\236\tChange actor align\n" \
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"Shift left/right click\t\342\236\236\tChange actor expand"
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static gboolean random_size = FALSE;
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static gboolean random_align = FALSE;
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static gboolean default_expand = TRUE;
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static gboolean use_box = FALSE;
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static gboolean is_vertical = FALSE;
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static GOptionEntry entries[] = {
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{
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"random-size", 'r',
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0,
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G_OPTION_ARG_NONE,
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&random_size,
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"Randomly size the rectangles", NULL
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},
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{
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"random-align", 'f',
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0,
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G_OPTION_ARG_NONE,
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&random_align,
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"Randomly set the align values", NULL
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},
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{
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"no-expand", 'e',
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G_OPTION_FLAG_REVERSE,
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G_OPTION_ARG_NONE,
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&default_expand,
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"Don't expand all actors by default", NULL,
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},
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{
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"box", 'b',
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0,
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G_OPTION_ARG_NONE,
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&use_box,
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"Use the layout in a ClutterBoxLayout style", NULL
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},
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{
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"vertical", 'v',
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0,
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G_OPTION_ARG_NONE,
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&is_vertical,
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"Use a vertical orientation when used with --box", NULL
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},
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{ NULL }
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};
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static gboolean
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button_release_cb (ClutterActor *actor,
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ClutterEvent *event,
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gpointer data)
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{
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ClutterActorAlign x_align, y_align;
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gboolean x_expand, y_expand;
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g_object_get (actor,
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"x-align", &x_align,
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"y-align", &y_align,
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"x-expand", &x_expand,
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"y-expand", &y_expand,
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NULL);
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switch (clutter_event_get_button (event))
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{
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case CLUTTER_BUTTON_PRIMARY:
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if (clutter_event_has_shift_modifier (event))
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x_expand = !x_expand;
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else
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{
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if (x_align < 3)
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x_align += 1;
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else
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x_align = 0;
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}
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break;
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case CLUTTER_BUTTON_SECONDARY:
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if (clutter_event_has_shift_modifier (event))
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y_expand = !y_expand;
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else
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{
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if (y_align < 3)
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y_align += 1;
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else
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y_align = 0;
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}
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break;
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default:
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return FALSE;
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}
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g_object_set (actor,
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"x-align", x_align,
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"y-align", y_align,
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"x-expand", x_expand,
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"y-expand", y_expand,
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NULL);
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return TRUE;
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}
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static const gchar *
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get_align_name (ClutterActorAlign align)
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{
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switch (align)
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{
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case CLUTTER_ACTOR_ALIGN_FILL:
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return "fill";
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case CLUTTER_ACTOR_ALIGN_START:
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return "start";
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case CLUTTER_ACTOR_ALIGN_CENTER:
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return "center";
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case CLUTTER_ACTOR_ALIGN_END:
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return "end";
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default:
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g_assert_not_reached ();
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}
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}
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static void
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changed_cb (ClutterActor *actor,
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GParamSpec *pspec,
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ClutterActor *text)
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{
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ClutterActorAlign x_align, y_align;
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ClutterActor *box;
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ClutterLayoutManager *layout;
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ClutterLayoutMeta *meta;
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gboolean x_expand, y_expand;
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gchar *label;
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gint left, top, width, height;
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box = clutter_actor_get_parent (actor);
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layout = clutter_actor_get_layout_manager (box);
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meta = clutter_layout_manager_get_child_meta (layout,
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CLUTTER_CONTAINER (box),
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actor);
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g_object_get (actor,
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"x-align", &x_align,
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"y-align", &y_align,
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"x-expand", &x_expand,
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"y-expand", &y_expand,
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NULL);
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g_object_get (meta,
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"left-attach", &left,
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"top-attach", &top,
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"width", &width,
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"height", &height,
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NULL);
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label = g_strdup_printf ("attach: %d,%d\n"
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"span: %d,%d\n"
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"expand: %d,%d\n"
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"align: %s,%s",
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left, top, width, height,
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x_expand, y_expand,
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get_align_name (x_align),
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get_align_name (y_align));
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clutter_text_set_text (CLUTTER_TEXT (text), label);
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g_free (label);
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}
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static void
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add_actor (ClutterActor *box,
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gint left,
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gint top,
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gint width,
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gint height)
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{
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ClutterActor *rect, *text;
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ClutterColor color;
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ClutterLayoutManager *layout;
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clutter_color_from_hls (&color,
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g_random_double_range (0.0, 360.0),
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0.5,
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0.5);
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color.alpha = 255;
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layout = clutter_bin_layout_new (CLUTTER_BIN_ALIGNMENT_CENTER,
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CLUTTER_BIN_ALIGNMENT_CENTER);
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rect = clutter_actor_new ();
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clutter_actor_set_layout_manager (rect, layout);
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clutter_actor_set_background_color (rect, &color);
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clutter_actor_set_reactive (rect, TRUE);
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if (random_size)
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clutter_actor_set_size (rect,
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g_random_int_range (40, 80),
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g_random_int_range (40, 80));
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else
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clutter_actor_set_size (rect, 60, 60);
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clutter_actor_set_x_expand (rect, default_expand);
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clutter_actor_set_y_expand (rect, default_expand);
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if (!default_expand)
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{
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clutter_actor_set_x_align (rect, CLUTTER_ACTOR_ALIGN_CENTER);
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clutter_actor_set_y_align (rect, CLUTTER_ACTOR_ALIGN_CENTER);
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}
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if (random_align)
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{
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clutter_actor_set_x_align (rect, g_random_int_range (0, 3));
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clutter_actor_set_y_align (rect, g_random_int_range (0, 3));
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}
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text = clutter_text_new_with_text ("Sans 8px", NULL);
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clutter_text_set_line_alignment (CLUTTER_TEXT (text),
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PANGO_ALIGN_CENTER);
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clutter_actor_add_child (rect, text);
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g_signal_connect (rect, "button-release-event",
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G_CALLBACK (button_release_cb), NULL);
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g_signal_connect (rect, "notify::x-expand",
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G_CALLBACK (changed_cb), text);
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g_signal_connect (rect, "notify::y-expand",
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G_CALLBACK (changed_cb), text);
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g_signal_connect (rect, "notify::x-align",
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G_CALLBACK (changed_cb), text);
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g_signal_connect (rect, "notify::y-align",
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G_CALLBACK (changed_cb), text);
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layout = clutter_actor_get_layout_manager (box);
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if (use_box)
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clutter_actor_add_child (box, rect);
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else
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clutter_grid_layout_attach (CLUTTER_GRID_LAYOUT (layout), rect,
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left, top, width, height);
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changed_cb (rect, NULL, text);
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}
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static gboolean
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key_release_cb (ClutterActor *stage,
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ClutterEvent *event,
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ClutterActor *box)
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{
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ClutterGridLayout *layout;
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gboolean toggle;
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guint spacing;
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layout = CLUTTER_GRID_LAYOUT (clutter_actor_get_layout_manager (box));
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switch (clutter_event_get_key_symbol (event))
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{
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case CLUTTER_KEY_a:
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toggle = clutter_layout_manager_get_use_animations
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(CLUTTER_LAYOUT_MANAGER (layout));
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clutter_layout_manager_set_use_animations
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(CLUTTER_LAYOUT_MANAGER (layout), !toggle);
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break;
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case CLUTTER_KEY_c:
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toggle = clutter_grid_layout_get_column_homogeneous (layout);
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clutter_grid_layout_set_column_homogeneous (layout, !toggle);
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break;
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case CLUTTER_KEY_r:
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toggle = clutter_grid_layout_get_row_homogeneous (layout);
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clutter_grid_layout_set_row_homogeneous (layout, !toggle);
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break;
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case CLUTTER_KEY_s:
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spacing = clutter_grid_layout_get_column_spacing (layout);
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if (spacing < 12)
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spacing += 1;
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else
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spacing = 0;
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clutter_grid_layout_set_column_spacing (layout, spacing);
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clutter_grid_layout_set_row_spacing (layout, spacing);
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break;
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case CLUTTER_KEY_q:
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clutter_main_quit ();
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break;
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default:
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return FALSE;
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}
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return TRUE;
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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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ClutterActor *stage, *box, *instructions;
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ClutterLayoutManager *stage_layout, *grid_layout;
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GError *error = NULL;
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if (clutter_init_with_args (&argc, &argv,
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NULL,
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entries,
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NULL,
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&error) != CLUTTER_INIT_SUCCESS)
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{
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g_print ("Unable to run grid-layout: %s", error->message);
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g_error_free (error);
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return EXIT_FAILURE;
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}
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stage = clutter_stage_new ();
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clutter_stage_set_user_resizable (CLUTTER_STAGE (stage), TRUE);
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stage_layout = clutter_box_layout_new ();
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clutter_box_layout_set_orientation (CLUTTER_BOX_LAYOUT (stage_layout),
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CLUTTER_ORIENTATION_VERTICAL);
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clutter_actor_set_layout_manager (stage, stage_layout);
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grid_layout = clutter_grid_layout_new ();
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if (is_vertical)
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clutter_grid_layout_set_orientation (CLUTTER_GRID_LAYOUT (grid_layout),
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CLUTTER_ORIENTATION_VERTICAL);
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box = clutter_actor_new ();
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clutter_actor_set_background_color (box, CLUTTER_COLOR_LightGray);
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clutter_actor_set_x_expand (box, TRUE);
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clutter_actor_set_y_expand (box, TRUE);
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clutter_actor_set_layout_manager (box, grid_layout);
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clutter_box_layout_pack (CLUTTER_BOX_LAYOUT (stage_layout), box,
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TRUE, TRUE, TRUE,
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CLUTTER_BOX_ALIGNMENT_CENTER,
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CLUTTER_BOX_ALIGNMENT_CENTER);
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add_actor (box, 0, 0, 1, 1);
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add_actor (box, 1, 0, 1, 1);
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add_actor (box, 2, 0, 1, 1);
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add_actor (box, 0, 1, 1, 1);
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add_actor (box, 1, 1, 2, 1);
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add_actor (box, 0, 2, 3, 1);
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add_actor (box, 0, 3, 2, 2);
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add_actor (box, 2, 3, 1, 1);
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add_actor (box, 2, 4, 1, 1);
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instructions = clutter_text_new_with_text ("Sans 12px", INSTRUCTIONS);
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clutter_actor_set_margin_top (instructions, 4);
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clutter_actor_set_margin_left (instructions, 4);
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clutter_actor_set_margin_bottom (instructions, 4);
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clutter_box_layout_pack (CLUTTER_BOX_LAYOUT (stage_layout), instructions,
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FALSE, TRUE, FALSE,
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CLUTTER_BOX_ALIGNMENT_START,
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CLUTTER_BOX_ALIGNMENT_CENTER);
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g_signal_connect (stage, "destroy",
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G_CALLBACK (clutter_main_quit), NULL);
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g_signal_connect (stage, "key-release-event",
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G_CALLBACK (key_release_cb), box);
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clutter_actor_show (stage);
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clutter_main ();
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return 0;
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}
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