Enlightenment CVS committal
Author : dj2
Project : e17
Module : docs
Dir : e17/docs/ewlbook/xml
Modified Files:
widgets.xml
Log Message:
- start the combo box code and update the media widget to have everything
from the recent changes
===================================================================
RCS file: /cvsroot/enlightenment/e17/docs/ewlbook/xml/widgets.xml,v
retrieving revision 1.4
retrieving revision 1.5
diff -u -3 -r1.4 -r1.5
--- widgets.xml 16 Jul 2004 04:11:17 -0000 1.4
+++ widgets.xml 18 Jul 2004 20:25:52 -0000 1.5
@@ -144,10 +144,30 @@
<example id="sec-EwlComboCode">
<title>Creating a combo box</title>
<programlisting role="C">
+ Ewl_Widget *combo = ewl_combo_new("combo box");
+ ewl_callback_append(combo, EWL_CALLBACK_VALUE_CHANGED,
+ combo_change_cb, NULL);
+ ewl_widget_show(combo);
+
+ Ewl_widget *item1 = ewl_menu_item_new(NULL, "foo");
+ ewl_container_append_child(EWL_CONTAINER(combo));
+ ewl_widget_show(item1);
</programlisting>
</example>
+</para>
+<para>
+<example id="sec-EwlComboCodeCB">
+ <title>combo box value changed callback</title>
+ <programlisting role="C">
+void combo_change_cb(Ewl_Widget *w, void *event, void *data) {
+ char *text = (char *)event;
+ printf("Value changed to %s\n", text);
+}
+ </programlisting>
+</example>
</para>
+
</sect1>
<!-- ################################### -->
@@ -241,6 +261,9 @@
<listitem><para>EWL_STOCK_CANCEL</para></listitem>
<listitem><para>EWL_STOCK_OPEN</para></listitem>
<listitem><para>EWL_STOCK_SAVE</para></listitem>
+ <listitem><para>EWL_STOCK_PAUSE</para></listitem>
+ <listitem><para>EWL_STOCK_PLAY</para></listitem>
+ <listitem><para>EWL_STOCK_STOP</para></listitem>
</itemizedlist>
The pre-defined response codes are:
<itemizedlist mark="bullet" spacing="compact">
@@ -249,6 +272,9 @@
<listitem><para>EWL_RESPONSE_OK</para></listitem>
<listitem><para>EWL_RESPONSE_CANCEL</para></listitem>
<listitem><para>EWL_RESPONSE_APPLY</para></listitem>
+ <listitem><para>EWL_RESPONSE_PLAY</para></listitem>
+ <listitem><para>EWL_RESPONSE_PAUSE</para></listitem>
+ <listitem><para>EWL_RESPONSE_STOP</para></listitem>
</itemizedlist>
Once the buttons are created they need to be added to the dialog and have a
callback append for there <literal>EWL_CALLBACK_CLICKED</literal> state.
@@ -696,12 +722,41 @@
<title>Ewl_Media code</title>
<programlisting role="C">
Ewl_Media *m = ewl_media_new(file);
+ ewl_callback_append(m, EWL_CALLBACK_REALIZE, video_realize_cb, NULL);
+ ewl_callback_append(m, EWL_CALLBACK_VALUE_CHANGED, video_change_cb, NULL);
ewl_widget_show(m);
</programlisting>
</example>
Creating the basic video object is no simpler then creating the object and
showning it (assuming you've appending it to whatever container it is being
-placed into).
+placed into). We hook the two callbacks
+<literal>EWL_CALLBACK_REALIZE</literal> and
+<literal>EWL_CALLBACK_VALUE_CHANGED</literal>. We hook in the realize
+callback so we can determine the length of the video to be displayed if
+desired. This is only available after the video has been realized, and will
+return 0 until it has been realized. The value change callback will be
+called whenever emotion advances the video. This can be used to setup a
+timer, or a seek bar and have it auto advance for the video.
+</para>
+
+<para>
+<example>
+ <title>Ewl_Media callbacks</title>
+ <programlisting role="C">
+void video_realize_cb(Ewl_Widget *w, void *event, void *data) {
+ double len = ewl_media_length_get(EWL_MEDIA(video));
+}
+
+void video_change_cb(Ewl_Widget *w, void *event, void *data) {
+ char buf[512];
+ int h, m;
+ double s;
+
+ ewl_media_position_time_get(EWL_MEDIA(video), &h, &m, &s);
+ snprintf(buf, sizeof(buf), "%02i:%02i:%02.0f", h, m, s);
+}
+ </programlisting>
+</example>
</para>
<para>
@@ -710,7 +765,9 @@
wish to know what is currently playing you can call
<function>char *ewl_media_media_get(Ewl_Media *)</function>. The length of
the current video can be retrieved by calling <function>int
-ewl_media_length_get(Ewl_Media *)</function>.
+ewl_media_length_get(Ewl_Media *)</function>. The length can also be
+retrieved as a time value by calling
+<function>ewl_media_length_time_get(Ewl_Media *, int h, int m, double s)</function>.
</para>
<para>
@@ -726,7 +783,9 @@
<function>double ewl_media_position_get(Ewl_Media *)</function> is used to determine
the current position in the video, while
<function>ewl_media_position_set(Ewl_Media *, double position)</function>
-can be used to set the position in the video.
+can be used to set the position in the video. This value can also be
+retrieved as a hours, minutes and seconds by calling
+<function>ewl_media_position_time_get(Ewl_Media *, int h, int m, double s)</function>.
</para>
<para>
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