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Merge remote branch 'elliot/cookbook-opacity-values-fix'

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* elliot/cookbook-opacity-values-fix:
  cookbook: Fix opacity examples in recipe
  cookbook: Fix incorrect value for opacity
This commit is contained in:
Emmanuele Bassi 2010-11-15 15:41:46 +00:00
commit f3295a3f36
2 changed files with 14 additions and 14 deletions
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26
doc/cookbook/actors.xml
View File

@ -276,10 +276,10 @@ on_paint (ClutterActor *actor)
<informalexample>
<programlisting>
/* 25% transparency */
clutter_actor_set_opacity (actor, 191.25);
clutter_actor_set_opacity (actor, 191);
/* 50% transparency */
clutter_actor_set_opacity (actor, 122.5);
clutter_actor_set_opacity (actor, 122);
/* completely transparent */
clutter_actor_set_opacity (actor, 0);
@ -325,13 +325,13 @@ clutter_actor_set_opacity (actor, 0);
<para>top-left: <code>255</code> (0% transparency)</para>
</listitem>
<listitem>
<para>top-right: <code>191.25</code> (25% transparency)</para>
<para>top-right: <code>191</code> (25% transparency)</para>
</listitem>
<listitem>
<para>bottom-right: <code>122.5</code> (50% transparency)</para>
<para>bottom-right: <code>122</code> (50% transparency)</para>
</listitem>
<listitem>
<para>bottom-left: <code>61.25</code> (75% transparency)</para>
<para>bottom-left: <code>61</code> (75% transparency)</para>
</listitem>
</itemizedlist>
@ -350,10 +350,10 @@ clutter_actor_set_opacity (actor, 0);
<para>If a container has its opacity set, any children of the
container have their opacity combined with their parent's opacity.
For example, if a parent has an opacity of <code>122.5</code>
For example, if a parent has an opacity of <code>122</code>
(50% transparent) and the child also has an opacity of
<code>122.5</code>, the child's <emphasis>effective</emphasis>
opacity is 25% (<code>opacity = 61.25</code>, and it is
<code>122</code>, the child's <emphasis>effective</emphasis>
opacity is 25% (<code>opacity = 61</code>, and it is
75% transparent).</para>
<para>To demonstrate the visual effect of this, here are
@ -382,14 +382,14 @@ clutter_actor_set_opacity (actor, 0);
<listitem>
<para>The middle rectangle has <code>opacity = 255</code>
and is in a <type>ClutterGroup</type> with
<code>opacity = 122.5</code>. Notice that the parent opacity
<code>opacity = 122</code>. Notice that the parent opacity
makes the rectangle appear darker, as the stage colour is showing
through from behind.</para>
</listitem>
<listitem>
<para>The right-hand rectangle has <code>opacity = 122.5</code>
<para>The right-hand rectangle has <code>opacity = 122</code>
and is in a <type>ClutterGroup</type> with
<code>opacity = 122.5</code>. Notice that the rectangle appears
<code>opacity = 122</code>. Notice that the rectangle appears
to be even darker, as the stage colour is showing
through both the rectangle and its parent.</para>
</listitem>
@ -405,12 +405,12 @@ clutter_actor_set_opacity (actor, 0);
<programlisting>
<![CDATA[
/* color with 50% transparency */
ClutterColor half_transparent_color = { 255, 0, 0, 122.5 };
ClutterColor half_transparent_color = { 255, 0, 0, 122 };
ClutterRectangle *actor = clutter_rectangle_new ();
/* set actor's transparency to 50% */
clutter_actor_set_opacity (actor, 122.5);
clutter_actor_set_opacity (actor, 122);
/* rectangle will be 25% opaque/75% transparent */
clutter_rectangle_set_color (CLUTTER_RECTANGLE (actor),

2
doc/cookbook/examples/events-pointer-motion-stacked.c
View File

@ -75,7 +75,7 @@ main (int argc, char *argv[])
clutter_actor_set_size (r3, 150, 150);
clutter_actor_add_constraint (r3, clutter_align_constraint_new (stage, CLUTTER_ALIGN_X_AXIS, 0.75));
clutter_actor_add_constraint (r3, clutter_align_constraint_new (stage, CLUTTER_ALIGN_Y_AXIS, 0.75));
clutter_actor_set_opacity (r3, 125.5);
clutter_actor_set_opacity (r3, 125);
clutter_actor_set_name (r3, "blue");
clutter_container_add (CLUTTER_CONTAINER (stage), r1, r2, r3, NULL);