From dae25d839edee004df76cf2ff9f3e988fdbf2845 Mon Sep 17 00:00:00 2001 From: Bastian Winkler Date: Sun, 3 Jun 2012 12:18:37 +0200 Subject: [PATCH] examples: Add a grid-layout example A fairly complete example for ClutterGridLayout https://bugzilla.gnome.org/show_bug.cgi?id=677372 --- examples/Makefile.am | 1 + examples/grid-layout.c | 386 +++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 387 insertions(+) create mode 100644 examples/grid-layout.c diff --git a/examples/Makefile.am b/examples/Makefile.am index c1da143..9c6f6ac 100644 --- a/examples/Makefile.am +++ b/examples/Makefile.am @@ -9,6 +9,7 @@ all_examples = \ drop-action \ easing-modes \ flow-layout \ + grid-layout \ layout-manager \ rounded-rectangle \ scroll-actor \ diff --git a/examples/grid-layout.c b/examples/grid-layout.c new file mode 100644 index 0000000..ffeefaf --- /dev/null +++ b/examples/grid-layout.c @@ -0,0 +1,386 @@ +/* + * Copyright 2012 Bastian Winkler + * + * 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 +#include + +#define INSTRUCTIONS \ + "Press r\t\342\236\236\tSwitch row homogeneous\n" \ + "Press c\t\342\236\236\tSwitch column homogeneous\n" \ + "Press s\t\342\236\236\tIncrement spacing (up to 12px)\n" \ + "Press a\t\342\236\236\tSwitch animations on/off\n" \ + "Press q\t\342\236\236\tQuit\n\n" \ + "Left/right click\t\t\342\236\236\tChange actor align\n" \ + "Shift left/right click\t\342\236\236\tChange actor expand" + +static gboolean random_size = FALSE; +static gboolean random_align = FALSE; +static gboolean default_expand = TRUE; +static gboolean use_box = FALSE; +static gboolean is_vertical = FALSE; + +static GOptionEntry entries[] = { + { + "random-size", 'r', + 0, + G_OPTION_ARG_NONE, + &random_size, + "Randomly size the rectangles", NULL + }, + { + "random-align", 'f', + 0, + G_OPTION_ARG_NONE, + &random_align, + "Randomly set the align values", NULL + }, + { + "no-expand", 'e', + G_OPTION_FLAG_REVERSE, + G_OPTION_ARG_NONE, + &default_expand, + "Don't expand all actors by default", NULL, + }, + { + "box", 'b', + 0, + G_OPTION_ARG_NONE, + &use_box, + "Use the layout in a ClutterBoxLayout style", NULL + }, + { + "vertical", 'v', + 0, + G_OPTION_ARG_NONE, + &is_vertical, + "Use a vertical orientation when used with --box", NULL + }, + { NULL } +}; + +static gboolean +button_release_cb (ClutterActor *actor, + ClutterEvent *event, + gpointer data) +{ + ClutterActorAlign x_align, y_align; + gboolean x_expand, y_expand; + + g_object_get (actor, + "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)) + x_expand = !x_expand; + 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 + { + if (y_align < 3) + y_align += 1; + else + y_align = 0; + } + break; + + default: + return FALSE; + } + + g_object_set (actor, + "x-align", x_align, + "y-align", y_align, + "x-expand", x_expand, + "y-expand", y_expand, + NULL); + return TRUE; +} + +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 void +changed_cb (ClutterActor *actor, + GParamSpec *pspec, + ClutterActor *text) +{ + ClutterActorAlign x_align, y_align; + ClutterActor *box; + ClutterLayoutManager *layout; + ClutterLayoutMeta *meta; + gboolean x_expand, y_expand; + gchar *label; + gint left, top, width, height; + + box = clutter_actor_get_parent (actor); + layout = clutter_actor_get_layout_manager (box); + meta = clutter_layout_manager_get_child_meta (layout, + CLUTTER_CONTAINER (box), + actor); + + g_object_get (actor, + "x-align", &x_align, + "y-align", &y_align, + "x-expand", &x_expand, + "y-expand", &y_expand, + NULL); + + g_object_get (meta, + "left-attach", &left, + "top-attach", &top, + "width", &width, + "height", &height, + NULL); + + label = g_strdup_printf ("attach: %d,%d\n" + "span: %d,%d\n" + "expand: %d,%d\n" + "align: %s,%s", + left, top, width, height, + 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 left, + gint top, + gint width, + gint height) +{ + 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); + + if (random_size) + clutter_actor_set_size (rect, + g_random_int_range (40, 80), + g_random_int_range (40, 80)); + else + clutter_actor_set_size (rect, 60, 60); + + clutter_actor_set_x_expand (rect, default_expand); + clutter_actor_set_y_expand (rect, default_expand); + + if (!default_expand) + { + clutter_actor_set_x_align (rect, CLUTTER_ACTOR_ALIGN_CENTER); + clutter_actor_set_y_align (rect, CLUTTER_ACTOR_ALIGN_CENTER); + } + + if (random_align) + { + clutter_actor_set_x_align (rect, g_random_int_range (0, 3)); + clutter_actor_set_y_align (rect, g_random_int_range (0, 3)); + } + + 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); + + layout = clutter_actor_get_layout_manager (box); + if (use_box) + clutter_actor_add_child (box, rect); + else + clutter_grid_layout_attach (CLUTTER_GRID_LAYOUT (layout), rect, + left, top, width, height); + changed_cb (rect, NULL, text); +} + +static gboolean +key_release_cb (ClutterActor *stage, + ClutterEvent *event, + ClutterActor *box) +{ + ClutterGridLayout *layout; + gboolean toggle; + guint spacing; + + layout = CLUTTER_GRID_LAYOUT (clutter_actor_get_layout_manager (box)); + + switch (clutter_event_get_key_symbol (event)) + { + case CLUTTER_KEY_a: + toggle = clutter_layout_manager_get_use_animations + (CLUTTER_LAYOUT_MANAGER (layout)); + clutter_layout_manager_set_use_animations + (CLUTTER_LAYOUT_MANAGER (layout), !toggle); + break; + + case CLUTTER_KEY_c: + toggle = clutter_grid_layout_get_column_homogeneous (layout); + clutter_grid_layout_set_column_homogeneous (layout, !toggle); + break; + + case CLUTTER_KEY_r: + toggle = clutter_grid_layout_get_row_homogeneous (layout); + clutter_grid_layout_set_row_homogeneous (layout, !toggle); + break; + + case CLUTTER_KEY_s: + spacing = clutter_grid_layout_get_column_spacing (layout); + if (spacing < 12) + spacing += 1; + else + spacing = 0; + clutter_grid_layout_set_column_spacing (layout, spacing); + clutter_grid_layout_set_row_spacing (layout, spacing); + 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 *stage_layout, *grid_layout; + GError *error = NULL; + + if (clutter_init_with_args (&argc, &argv, + NULL, + entries, + NULL, + &error) != CLUTTER_INIT_SUCCESS) + { + g_print ("Unable to run grid-layout: %s", error->message); + g_error_free (error); + + return EXIT_FAILURE; + } + + stage = clutter_stage_new (); + clutter_stage_set_user_resizable (CLUTTER_STAGE (stage), TRUE); + stage_layout = clutter_box_layout_new (); + clutter_box_layout_set_orientation (CLUTTER_BOX_LAYOUT (stage_layout), + CLUTTER_ORIENTATION_VERTICAL); + clutter_actor_set_layout_manager (stage, stage_layout); + + grid_layout = clutter_grid_layout_new (); + if (is_vertical) + clutter_grid_layout_set_orientation (CLUTTER_GRID_LAYOUT (grid_layout), + CLUTTER_ORIENTATION_VERTICAL); + 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); + clutter_actor_set_layout_manager (box, grid_layout); + clutter_box_layout_pack (CLUTTER_BOX_LAYOUT (stage_layout), box, + TRUE, TRUE, TRUE, + CLUTTER_BOX_ALIGNMENT_CENTER, + CLUTTER_BOX_ALIGNMENT_CENTER); + + add_actor (box, 0, 0, 1, 1); + add_actor (box, 1, 0, 1, 1); + add_actor (box, 2, 0, 1, 1); + add_actor (box, 0, 1, 1, 1); + add_actor (box, 1, 1, 2, 1); + add_actor (box, 0, 2, 3, 1); + add_actor (box, 0, 3, 2, 2); + add_actor (box, 2, 3, 1, 1); + add_actor (box, 2, 4, 1, 1); + + instructions = clutter_text_new_with_text ("Sans 12px", INSTRUCTIONS); + clutter_actor_set_margin_top (instructions, 4); + clutter_actor_set_margin_left (instructions, 4); + clutter_actor_set_margin_bottom (instructions, 4); + clutter_box_layout_pack (CLUTTER_BOX_LAYOUT (stage_layout), instructions, + FALSE, TRUE, FALSE, + CLUTTER_BOX_ALIGNMENT_START, + CLUTTER_BOX_ALIGNMENT_CENTER); + + 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 0; +} -- 2.7.4