Enlightenment CVS committal
Author : dj2
Project : e17
Module : docs
Dir : e17/docs/cookbook/xml/ewl
Modified Files:
ewl_intro.xml
Log Message:
- don't need the mouse wheel callback on a scrollpan anymore as its built into
the pane itself
===================================================================
RCS file: /cvsroot/enlightenment/e17/docs/cookbook/xml/ewl/ewl_intro.xml,v
retrieving revision 1.3
retrieving revision 1.4
diff -u -3 -r1.3 -r1.4
--- ewl_intro.xml 4 Jul 2004 19:34:32 -0000 1.3
+++ ewl_intro.xml 10 Jul 2004 20:59:11 -0000 1.4
@@ -50,7 +50,6 @@
static void home_cb(Ewl_Widget *win, void *ev, void *data);
static void file_menu_open_cb(Ewl_Widget *, void *, void *);
static void key_up_cb(Ewl_Widget *, void *, void *);
-static void wheel_cb(Ewl_Widget *win, void *ev, void *data);
static char *read_file(char *);
static void mk_gui(void);
@@ -406,15 +405,14 @@
<title>Attach callbacks</title>
<programlisting>
ewl_callback_append(main_win, EWL_CALLBACK_KEY_UP, key_up_cb, scroll);
- ewl_callback_append(main_win, EWL_CALLBACK_MOUSE_WHEEL, wheel_cb, scroll);
}
</programlisting>
</example>
<para>
Once everything is setup on the main window we attach the callbacks we wish to
-receive. In this case we are attaching ourselves to the EWL_CALLBACK_KEY_UP and
-the EWL_CALLBACK_MOUSE_WHEEL. This way we well be notified if a key on the
-keyboard is release, or the use rolls the mouse wheel.
+receive. In this case we are attaching ourselves to the EWL_CALLBACK_KEY_UP callback.
+We don't need to do anything to have mouse wheel scrolling in the scrollpane as
+it is configured into the scrollpane itself.
</para>
<example>
@@ -696,45 +694,6 @@
</para>
<example>
-<title>Mouse wheel callback</title>
-<programlisting>
-/* the mouse wheel callback */
-static void wheel_cb(Ewl_Widget *win, void *ev, void *data) {
- Ewl_Event_Mouse_Wheel *e = (Ewl_Event_Mouse_Wheel *)ev;
- Ewl_ScrollPane *scroll = (Ewl_ScrollPane *)data;
-
- if (e->z > 0) {
- double val = ewl_scrollpane_get_vscrollbar_value(EWL_SCROLLPANE(scroll));
- double step = ewl_scrollpane_get_vscrollbar_step(EWL_SCROLLPANE(scroll));
-
- if (val != 1)
- ewl_scrollpane_set_vscrollbar_value(EWL_SCROLLPANE(scroll),
- val + step);
- } else {
- double val = ewl_scrollpane_get_vscrollbar_value(EWL_SCROLLPANE(scroll));
- double step = ewl_scrollpane_get_vscrollbar_step(EWL_SCROLLPANE(scroll));
-
- if (val != 0)
- ewl_scrollpane_set_vscrollbar_value(EWL_SCROLLPANE(scroll),
- val - step);
- }
-}
-</programlisting>
-</example>
-<para>
-The final callback we need to deal with is for the mouse wheel. The event data
-passed to the mouse wheel callback is a Ewl_Event_Mouse_Wheel structure. From
-this structure we can see which way the user rolled the wheel by examining the
-"z" entry. If this value is 1, the use ran the wheel forward, if it is -1
the user
-ran the wheel backwards.
-</para>
-
-<para>
-So we use the same logic from the key press callback to manipulate the scrollpane
-when the wheel is turned.
-</para>
-
-<example>
<title>Complication</title>
<screen>
[EMAIL PROTECTED] [ewl_intro] -< gcc -Wall -o ewl_text main.c \
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