accdd92110
Added 3 examples for the box layout recipe: 1) Simple box layout demonstrating how to set actor properties 2) Trivial menu implementation using box layout 3) Demonstration app which enables tweaking and testing of layout property interactions Also inlined example 1 in the solution section and added more explanatory text in the discussion.
96 lines
3.3 KiB
C
96 lines
3.3 KiB
C
#include <stdlib.h>
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#include <clutter/clutter.h>
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static const ClutterColor stage_color = { 0x33, 0x33, 0x55, 0xff };
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static const ClutterColor box_color = { 0xff, 0xff, 0xff, 0xff };
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static const ClutterColor yellow_color = { 0xaa, 0xaa, 0x00, 0xff };
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static const ClutterColor red_color = { 0xff, 0x00, 0x00, 0xff };
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static const ClutterColor blue_color = { 0x00, 0x00, 0xff, 0xff };
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int
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main (int argc,
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char *argv[])
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{
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ClutterActor *stage;
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ClutterLayoutManager *box_layout;
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ClutterActor *box;
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ClutterActor *yellow;
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ClutterActor *red;
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ClutterActor *blue;
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clutter_init (&argc, &argv);
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stage = clutter_stage_get_default ();
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clutter_actor_set_size (stage, 400, 400);
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clutter_stage_set_color (CLUTTER_STAGE (stage), &stage_color);
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g_signal_connect (stage, "destroy", G_CALLBACK (clutter_main_quit), NULL);
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/* create a ClutterBoxLayout */
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box_layout = clutter_box_layout_new ();
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/* configure it to lay out actors vertically */
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clutter_box_layout_set_vertical (CLUTTER_BOX_LAYOUT (box_layout), TRUE);
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/* put 5px of spacing between actors */
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clutter_box_layout_set_spacing (CLUTTER_BOX_LAYOUT (box_layout), 5);
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/* actors are packed into this box; we set its width, but
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* allow its height to be determined by the children it contains
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*/
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box = clutter_box_new (box_layout);
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clutter_box_set_color (CLUTTER_BOX (box), &box_color);
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clutter_actor_set_position (box, 100, 50);
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clutter_actor_set_width (box, 200);
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/* pack an actor into the layout and set all layout properties on it
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* at the same time
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*/
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yellow = clutter_rectangle_new_with_color (&yellow_color);
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clutter_actor_set_size (yellow, 100, 100);
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clutter_box_layout_pack (CLUTTER_BOX_LAYOUT (box_layout),
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yellow,
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FALSE, /* expand */
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TRUE, /* x-fill */
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FALSE, /* y-fill */
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CLUTTER_BOX_ALIGNMENT_START, /* x-align */
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CLUTTER_BOX_ALIGNMENT_START); /* y-align */
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/* pack an actor into the box and set layout properties at the
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* same time; note this is more concise if you mostly want to
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* use the default properties for the layout
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*/
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red = clutter_rectangle_new_with_color (&red_color);
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clutter_actor_set_size (red, 100, 100);
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clutter_box_pack (CLUTTER_BOX (box),
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red,
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"x-fill", TRUE,
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NULL);
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/* add an actor to the box as a container and set layout properties
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* afterwards; the latter is useful if you want to change properties on
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* actors already inside a layout, but note that you have to
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* pass the function both the layout AND the container
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*/
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blue = clutter_rectangle_new_with_color (&blue_color);
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clutter_actor_set_size (blue, 100, 100);
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clutter_container_add_actor (CLUTTER_CONTAINER (box), blue);
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clutter_layout_manager_child_set (box_layout,
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CLUTTER_CONTAINER (box),
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blue,
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"x-fill", TRUE,
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NULL);
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/* put the box on the stage */
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clutter_container_add_actor (CLUTTER_CONTAINER (stage), box);
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clutter_actor_show (stage);
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clutter_main ();
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return EXIT_SUCCESS;
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}
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