forked from AuroraMiddleware/gtk
11aed263b7
Tue May 14 16:44:09 2002 Owen Taylor <otaylor@redhat.com>
* gtk/gtklabel.c (gtk_label_ensure_layout): Set
the width of the layout to the actual wrap width
(our requisition) not the width we set when calculating
the width. This results in the lines being justified
within the correct area. (#79157, Anders Carlsson)
* gtk/gtkaccelgroup.c gtk/gtkmarshelers.list: Corrected
registered parameter types of "accel_activate" and
"accel_changed" signals. (Patch from Murray Cumming, #78798)
* gtk/gtkrc.c (gtk_rc_make_default_dir): Switch
binary-version and type to correspond to the
current ordering in _gtk_get_module_path.
(#78746, Sergey Kuzminov)
* gtk/gtkrc.c (gtk_rc_get_module_dir): Add docs
pointing to the GTK_PATH documentation.
* gtk/Makefile.am (uninstall-local): Delete
key themes as well. (#81286, Kristian Rietveld.)
161 lines
4.2 KiB
Plaintext
161 lines
4.2 KiB
Plaintext
<!-- ##### SECTION Title ##### -->
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GtkScale
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<!-- ##### SECTION Short_Description ##### -->
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a base class for #GtkHScale and #GtkVScale.
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<!-- ##### SECTION Long_Description ##### -->
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<para>
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A #GtkScale is a slider control used to select a numeric value.
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To use it, you'll probably want to investigate the methods on
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its base class, #GtkRange, in addition to the methods for #GtkScale itself.
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To set the value of a scale, you would normally use gtk_range_set_value().
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To detect changes to the value, you would normally use the "value_changed"
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signal.
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</para>
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<para>
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The #GtkScale widget is an abstract class, used only for deriving the
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subclasses #GtkHScale and #GtkVScale. To create a scale widget,
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call gtk_hscale_new_with_range() or gtk_vscale_new_with_range().
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</para>
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<!-- ##### SECTION See_Also ##### -->
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<para>
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</para>
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<!-- ##### STRUCT GtkScale ##### -->
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<para>
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The #GtkScale-struct struct contains the following fields.
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(These fields should be considered read-only. They should never be set by
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an application.)
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<informaltable pgwide=1 frame="none" role="struct">
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<tgroup cols="2"><colspec colwidth="2*"><colspec colwidth="8*">
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<tbody>
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<row>
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<entry>#guint <structfield>draw_value</structfield>;</entry>
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<entry>non-zero if the scale's current value is displayed next to the
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slider.</entry>
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</row>
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<row>
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<entry>#guint <structfield>value_pos</structfield>;</entry>
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<entry>the position in which the textual value is displayed, selected from
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#GtkPositionType.</entry>
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</row>
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</tbody></tgroup></informaltable>
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</para>
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<!-- ##### FUNCTION gtk_scale_set_digits ##### -->
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<para>
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Sets the number of decimal places that are displayed in the value. Also causes
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the value of the adjustment to be rounded off to this number of digits, so the
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retrieved value matches the value the user saw.
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</para>
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@scale: a #GtkScale.
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@digits: the number of decimal places to display, e.g. use 1 to display 1.0,
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2 to display 1.00 etc.
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<!-- ##### FUNCTION gtk_scale_set_draw_value ##### -->
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<para>
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Specifies whether the current value is displayed as a string next to the
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slider.
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</para>
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@scale: a #GtkScale.
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@draw_value: a boolean.
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<!-- ##### FUNCTION gtk_scale_set_value_pos ##### -->
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<para>
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Sets the position in which the current value is displayed.
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</para>
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@scale: a #GtkScale.
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@pos: the position in which the current value is displayed.
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<!-- ##### FUNCTION gtk_scale_get_digits ##### -->
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<para>
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Gets the number of decimal places that are displayed in the value.
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</para>
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@scale: a #GtkScale.
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@Returns: the number of decimal places that are displayed.
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<!-- ##### FUNCTION gtk_scale_get_draw_value ##### -->
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<para>
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Returns whether the current value is displayed as a string next to the
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slider.
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</para>
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@scale: a #GtkScale.
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@Returns: whether the current value is displayed as a string.
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<!-- ##### FUNCTION gtk_scale_get_value_pos ##### -->
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<para>
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Gets the position in which the current value is displayed.
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</para>
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@scale: a #GtkScale.
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@Returns: the position in which the current value is displayed.
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<!-- ##### SIGNAL GtkScale::format-value ##### -->
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<para>
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Signal which allows you to change how the scale value is displayed. Connect a
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signal handler which returns an allocated string representing @value.
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That string will then be used to display the scale's value.
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Here's an example signal handler which displays a value 1.0 as
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with "-->1.0<--".
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<informalexample><programlisting>
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static gchar*
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format_value_callback (GtkScale *scale,
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gdouble value)
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{
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return g_strdup_printf ("-->%0.*g<--",
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gtk_scale_get_digits (scale), value);
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}
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</programlisting></informalexample>
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</para>
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@scale: the object which received the signal.
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@arg1:
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@Returns: allocated string representing @value
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<!-- # Unused Parameters # -->
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@value: value to format
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<!-- ##### ARG GtkScale:digits ##### -->
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<para>
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The number of decimal places that are displayed in the value.
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</para>
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<!-- ##### ARG GtkScale:draw-value ##### -->
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<para>
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If the current value is displayed as a string next to the slider.
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</para>
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<!-- ##### ARG GtkScale:value-pos ##### -->
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<para>
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The position in which the current value is displayed.
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</para>
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<!-- ##### ARG GtkScale:slider-length ##### -->
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<para>
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</para>
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<!-- ##### ARG GtkScale:value-spacing ##### -->
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<para>
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</para>
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