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aece642adb
Make sure users get the idea that clutter_init()
has a return value that needs to be checked.
These were fixed via sed magic:
sed -i -s -e "s/clutter_init (.*)/\
if (& != CLUTTER_INIT_SUCCESS)\n return 1/"\
doc/*/*/*.{c,xml} doc/*/*.xml
http://bugzilla.clutter-project.org/show_bug.cgi?id=2574
115 lines
3.6 KiB
C
115 lines
3.6 KiB
C
#include <clutter/clutter.h>
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static const ClutterColor stage_color = { 0x33, 0x33, 0x55, 0xff };
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static const ClutterColor yellow = { 0xaa, 0x99, 0x00, 0xff };
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static const ClutterColor white = { 0xff, 0xff, 0xff, 0xff };
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static gboolean
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_pointer_enter_cb (ClutterActor *actor,
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ClutterEvent *event,
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gpointer user_data)
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{
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ClutterState *transitions = CLUTTER_STATE (user_data);
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clutter_state_set_state (transitions, "fade-in");
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return TRUE;
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}
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static gboolean
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_pointer_leave_cb (ClutterActor *actor,
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ClutterEvent *event,
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gpointer user_data)
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{
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ClutterState *transitions = CLUTTER_STATE (user_data);
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clutter_state_set_state (transitions, "fade-out");
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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;
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ClutterLayoutManager *layout;
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ClutterActor *box;
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ClutterActor *rect;
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ClutterActor *text;
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ClutterState *transitions;
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if (clutter_init (&argc, &argv) != CLUTTER_INIT_SUCCESS)
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return 1;
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stage = clutter_stage_get_default ();
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clutter_stage_set_color (CLUTTER_STAGE (stage), &stage_color);
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clutter_stage_set_title (CLUTTER_STAGE (stage), "btn");
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layout = clutter_bin_layout_new (CLUTTER_BIN_ALIGNMENT_FILL,
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CLUTTER_BIN_ALIGNMENT_FILL);
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box = clutter_box_new (layout);
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clutter_actor_set_position (box, 25, 25);
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clutter_actor_set_reactive (box, TRUE);
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clutter_actor_set_size (box, 100, 30);
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/* background for the button */
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rect = clutter_rectangle_new_with_color (&yellow);
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clutter_container_add_actor (CLUTTER_CONTAINER (box), rect);
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/* text for the button */
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text = clutter_text_new_full ("Sans 10pt", "Hover me", &white);
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clutter_text_set_line_alignment (CLUTTER_TEXT (text), PANGO_ALIGN_CENTER);
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/*
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* NB don't set the height, so the actor assumes the height of the text;
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* then when added to the bin layout, it gets centred on it;
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* also if you don't set the width, the layout goes gets really wide;
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* the 10pt text fits inside the 30px height of the rectangle
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*/
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clutter_actor_set_width (text, 100);
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clutter_bin_layout_add (CLUTTER_BIN_LAYOUT (layout),
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text,
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CLUTTER_BIN_ALIGNMENT_CENTER,
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CLUTTER_BIN_ALIGNMENT_CENTER);
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/* animations */
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transitions = clutter_state_new ();
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clutter_state_set (transitions, NULL, "fade-out",
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box, "opacity", CLUTTER_LINEAR, 180,
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NULL);
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/*
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* NB you can't use an easing mode where alpha > 1.0 if you're
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* animating to a value of 255, as the value you're animating
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* to will possibly go > 255
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*/
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clutter_state_set (transitions, NULL, "fade-in",
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box, "opacity", CLUTTER_LINEAR, 255,
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NULL);
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clutter_state_set_duration (transitions, NULL, NULL, 50);
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clutter_state_warp_to_state (transitions, "fade-out");
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g_signal_connect (box,
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"enter-event",
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G_CALLBACK (_pointer_enter_cb),
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transitions);
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g_signal_connect (box,
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"leave-event",
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G_CALLBACK (_pointer_leave_cb),
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transitions);
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/* bind the stage size to the box size + 50px in each axis */
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clutter_actor_add_constraint (stage, clutter_bind_constraint_new (box, CLUTTER_BIND_HEIGHT, 50.0));
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clutter_actor_add_constraint (stage, clutter_bind_constraint_new (box, CLUTTER_BIND_WIDTH, 50.0));
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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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g_object_unref (transitions);
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return 0;
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}
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