forked from AuroraMiddleware/gtk
e0f2974885
Sun Feb 17 21:33:33 2002 Owen Taylor <otaylor@redhat.com>
* gtk/gtk-sections.txt: Updated for filesel changes.
476 lines
9.4 KiB
Plaintext
476 lines
9.4 KiB
Plaintext
<!-- ##### SECTION Title ##### -->
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GtkSpinButton
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<!-- ##### SECTION Short_Description ##### -->
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retrieve an integer or floating-point number from the user.
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<!-- ##### SECTION Long_Description ##### -->
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<para>
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A #GtkSpinButton is an ideal way to allow the user to set the value of some
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attribute. Rather than having to directly type a number into a #GtkEntry,
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#GtkSpinButton allows the user to click on one of two arrows to increment or
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decrement the displayed value. A value can still be typed in, with the bonus
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that it can be checked to ensure it is in a given range.
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</para>
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<para>
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The main properties of a #GtkSpinButton are through a #GtkAdjustment. See the
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#GtkAdjustment section for more details about an adjustment's properties.
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</para>
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<para>
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<example>
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<title>Using a <structname>GtkSpinButton</structname> to get an integer.</title>
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<programlisting>
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/* Provides a function to retrieve an integer value from a GtkSpinButton
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* and creates a spin button to model percentage values.
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*/
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gint grab_int_value (GtkSpinButton *a_spinner, gpointer user_data) {
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return gtk_spin_button_get_value_as_int (a_spinner);
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}
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void create_integer_spin_button (void) {
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GtkWidget *window, *spinner;
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GtkAdjustment *spinner_adj;
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spinner_adj = (GtkAdjustment *) gtk_adjustment_new (50.0, 0.0, 100.0, 1.0, 5.0, 5.0);
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window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
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gtk_container_set_border_width (GTK_CONTAINER (window), 5);
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/* creates the spinner, with no decimal places */
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spinner = gtk_spin_button_new (spinner_adj, 1.0, 0);
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gtk_container_add (GTK_CONTAINER (window), spinner);
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gtk_widget_show_all (window);
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return;
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}
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</programlisting>
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</example>
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</para>
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<para>
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<example>
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<title>Using a <structname>GtkSpinButton</structname> to get a floating point value.</title>
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<programlisting>
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/* Provides a function to retrieve a floating point value from a
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* GtkSpinButton, and creates a high precision spin button.
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*/
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gfloat grab_int_value (GtkSpinButton *a_spinner, gpointer user_data) {
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return gtk_spin_button_get_value (a_spinner);
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}
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void create_floating_spin_button (void) {
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GtkWidget *window, *spinner;
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GtkAdjustment *spinner_adj;
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spinner_adj = (GtkAdjustment *) gtk_adjustment_new (2.500, 0.0, 5.0, 0.001, 0.1, 0.1);
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window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
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gtk_container_set_border_width (GTK_CONTAINER (window), 5);
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/* creates the spinner, with three decimal places */
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spinner = gtk_spin_button_new (spinner_adj, 0.001, 3);
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gtk_container_add (GTK_CONTAINER (window), spinner);
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gtk_widget_show_all (window);
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return;
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}
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</programlisting>
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</example>
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</para>
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<!-- ##### SECTION See_Also ##### -->
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<para>
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<variablelist>
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<varlistentry>
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<term>#GtkEntry</term>
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<listitem><para>retrieve text rather than numbers.</para></listitem>
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</varlistentry>
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</variablelist>
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</para>
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<!-- ##### STRUCT GtkSpinButton ##### -->
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<para>
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<structfield>entry</structfield> is the #GtkEntry part of the #GtkSpinButton
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widget, and can be used accordingly. All other fields contain private data
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and should only be modified using the functions below.
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</para>
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<!-- ##### ENUM GtkSpinButtonUpdatePolicy ##### -->
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<para>
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<informaltable pgwide=1 frame="none" role="enum">
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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>GTK_UPDATE_ALWAYS</entry>
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<entry>When refreshing your #GtkSpinButton, the value is always displayed.</entry>
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</row>
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<row>
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<entry>GTK_UPDATE_IF_VALID</entry>
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<entry>When refreshing your #GtkSpinButton, the value is only displayed if it is valid within the bounds of the spin button's #GtkAdjustment.</entry>
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</row>
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</tbody></tgroup></informaltable>
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</para>
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@GTK_UPDATE_ALWAYS:
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@GTK_UPDATE_IF_VALID:
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<!-- ##### ENUM GtkSpinType ##### -->
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<para>
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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>GTK_SPIN_STEP_FORWARD,
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GTK_SPIN_STEP_BACKWARD,
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GTK_SPIN_PAGE_FORWARD,
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GTK_SPIN_PAGE_BACKWARD</entry>
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<entry>These values spin a #GtkSpinButton by the relevant values of the spin button's #GtkAdjustment.</entry>
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</row>
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<row>
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<entry>GTK_SPIN_HOME,
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GTK_SPIN_END</entry>
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<entry>These set the spin button's value to the minimum or maxmimum possible values, (set by it's #GtkAdjustment), respectively.</entry>
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</row>
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<row>
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<entry>GTK_SPIN_USER_DEFINED</entry>
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<entry>The programmer must specify the exact amount to spin the #GtkSpinButton.</entry>
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</row>
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</tbody></tgroup></informaltable>
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</para>
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@GTK_SPIN_STEP_FORWARD:
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@GTK_SPIN_STEP_BACKWARD:
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@GTK_SPIN_PAGE_FORWARD:
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@GTK_SPIN_PAGE_BACKWARD:
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@GTK_SPIN_HOME:
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@GTK_SPIN_END:
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@GTK_SPIN_USER_DEFINED:
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<!-- ##### FUNCTION gtk_spin_button_configure ##### -->
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<para>
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Changes the properties of an existing spin button. The adjustment, climb rate, and number of decimal places are all changed accordingly, after this function call.
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</para>
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@spin_button: a #GtkSpinButton.
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@adjustment: a #GtkAdjustment.
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@climb_rate: the new climb rate.
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@digits: the number of decimal places to display in the spin button.
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<!-- ##### FUNCTION gtk_spin_button_new ##### -->
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<para>
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Creates a new #GtkSpinButton.
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</para>
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@adjustment: the #GtkAdjustment object that this spin button should use.
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@climb_rate: specifies how much the spin button changes when an arrow is clicked on.
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@digits: the number of decimal places to display.
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@Returns: The new spin button as a #GtkWidget.
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<!-- ##### FUNCTION gtk_spin_button_new_with_range ##### -->
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<para>
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</para>
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@min:
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@max:
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@step:
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@Returns:
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<!-- ##### FUNCTION gtk_spin_button_set_adjustment ##### -->
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<para>
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</para>
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@spin_button:
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@adjustment:
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<!-- ##### FUNCTION gtk_spin_button_get_adjustment ##### -->
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<para>
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</para>
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@spin_button:
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@Returns:
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<!-- ##### FUNCTION gtk_spin_button_set_digits ##### -->
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<para>
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</para>
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@spin_button:
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@digits:
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<!-- ##### FUNCTION gtk_spin_button_set_increments ##### -->
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<para>
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</para>
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@spin_button:
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@step:
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@page:
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<!-- ##### FUNCTION gtk_spin_button_set_range ##### -->
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<para>
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</para>
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@spin_button:
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@min:
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@max:
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<!-- ##### MACRO gtk_spin_button_get_value_as_float ##### -->
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<para>
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Gets the value in the @spin_button. This function is deprecated,
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use gtk_spin_button_get_value() instead.
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</para>
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@Returns: the value of @spin_button.
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<!-- # Unused Parameters # -->
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@spin_button: a #GtkSpinButton.
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<!-- ##### FUNCTION gtk_spin_button_get_value_as_int ##### -->
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<para>
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</para>
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@spin_button:
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@Returns:
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<!-- ##### FUNCTION gtk_spin_button_set_value ##### -->
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<para>
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</para>
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@spin_button:
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@value:
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<!-- ##### FUNCTION gtk_spin_button_set_update_policy ##### -->
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<para>
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</para>
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@spin_button:
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@policy:
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<!-- ##### FUNCTION gtk_spin_button_set_numeric ##### -->
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<para>
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</para>
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@spin_button:
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@numeric:
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<!-- ##### FUNCTION gtk_spin_button_spin ##### -->
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<para>
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</para>
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@spin_button:
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@direction:
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@increment:
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<!-- ##### FUNCTION gtk_spin_button_set_wrap ##### -->
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<para>
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</para>
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@spin_button:
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@wrap:
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<!-- ##### FUNCTION gtk_spin_button_set_snap_to_ticks ##### -->
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<para>
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</para>
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@spin_button:
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@snap_to_ticks:
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<!-- ##### FUNCTION gtk_spin_button_update ##### -->
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<para>
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</para>
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@spin_button:
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<!-- ##### FUNCTION gtk_spin_button_get_digits ##### -->
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<para>
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</para>
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@spin_button:
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@Returns:
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<!-- ##### FUNCTION gtk_spin_button_get_increments ##### -->
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<para>
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</para>
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@spin_button:
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@step:
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@page:
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<!-- ##### FUNCTION gtk_spin_button_get_numeric ##### -->
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<para>
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</para>
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@spin_button:
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@Returns:
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<!-- ##### FUNCTION gtk_spin_button_get_range ##### -->
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<para>
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</para>
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@spin_button:
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@min:
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@max:
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<!-- ##### FUNCTION gtk_spin_button_get_snap_to_ticks ##### -->
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<para>
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</para>
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@spin_button:
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@Returns:
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<!-- ##### FUNCTION gtk_spin_button_get_update_policy ##### -->
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<para>
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</para>
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@spin_button:
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@Returns:
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<!-- ##### FUNCTION gtk_spin_button_get_value ##### -->
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<para>
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</para>
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@spin_button:
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@Returns:
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<!-- ##### FUNCTION gtk_spin_button_get_wrap ##### -->
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<para>
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</para>
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@spin_button:
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@Returns:
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<!-- ##### MACRO GTK_INPUT_ERROR ##### -->
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<para>
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</para>
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<!-- ##### SIGNAL GtkSpinButton::change-value ##### -->
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<para>
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</para>
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@spinbutton: the object which received the signal.
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@arg1:
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<!-- ##### SIGNAL GtkSpinButton::input ##### -->
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<para>
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</para>
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@spinbutton: the object which received the signal.
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@arg1:
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@Returns:
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<!-- ##### SIGNAL GtkSpinButton::output ##### -->
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<para>
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</para>
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@spinbutton: the object which received the signal.
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@Returns:
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<!-- ##### SIGNAL GtkSpinButton::value-changed ##### -->
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<para>
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</para>
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@spinbutton: the object which received the signal.
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<!-- ##### ARG GtkSpinButton:adjustment ##### -->
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<para>
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the #GtkAdjustment that defines a spin button's main properties.
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</para>
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<!-- ##### ARG GtkSpinButton:climb-rate ##### -->
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<para>
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the amount a spin button changes when an arrow is clicked.
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</para>
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<!-- ##### ARG GtkSpinButton:digits ##### -->
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<para>
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the number of decimal places to display.
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</para>
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<!-- ##### ARG GtkSpinButton:snap-to-ticks ##### -->
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<para>
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whether erroneous values are automatically changed to a spin button's nearest step increment.
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</para>
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<!-- ##### ARG GtkSpinButton:numeric ##### -->
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<para>
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whether non-numeric characters should be ignored.
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</para>
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<!-- ##### ARG GtkSpinButton:wrap ##### -->
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<para>
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whether a spin button should wrap upon reaching its limits.
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</para>
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<!-- ##### ARG GtkSpinButton:update-policy ##### -->
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<para>
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how a spin button should be updated.
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</para>
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<!-- ##### ARG GtkSpinButton:value ##### -->
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<para>
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reads the current value, or sets a new value.
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</para>
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