<chapter id="simple_widgets"> <title>Simple Widgets</title> <!-- <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="CH3.intro.xml"/> --> <para> Each of these widgets performs a specific user interface function. They are <emphasis remap='I'>simple</emphasis> because they cannot have widget children\(emthey may only be used as leaves of the widget tree. These widgets display information or take user input. </para> <variablelist> <varlistentry> <term><function>Command</function></term> <listitem> <para> A push button that, when selected, may cause a specific action to take place. This widget can display a multi-line string or a bitmap or pixmap image. </para> </listitem> </varlistentry> <varlistentry> <term><function>Grip</function></term> <listitem> <para> A rectangle that, when selected, will cause an action to take place. </para> </listitem> </varlistentry> <varlistentry> <term><function>Label</function></term> <listitem> <para> A rectangle that can display a multi-line string or a bitmap or pixmap image. </para> </listitem> </varlistentry> <varlistentry> <term><function>List</function></term> <listitem> <para> A list of text strings presented in row column format that may be individually selected. When an element is selected an action may take place. </para> </listitem> </varlistentry> <varlistentry> <term><function>Panner</function></term> <listitem> <para> A rectangular area containing a <emphasis remap='I'>slider</emphasis> that may be moved in two dimensions. Notification of movement may be continuous or discrete. </para> </listitem> </varlistentry> <varlistentry> <term><function>Repeater</function></term> <listitem> <para> A push button that triggers an action at an increasing rate when selected. This widget can display a multi-line string or a bitmap or pixmap image. </para> </listitem> </varlistentry> <varlistentry> <term><function>Scrollbar</function></term> <listitem> <para> A rectangular area containing a <emphasis remap='I'>thumb</emphasis> that when slid along one dimension may cause a specific action to take place. The Scrollbar may be oriented horizontally or vertically. </para> </listitem> </varlistentry> <varlistentry> <term><function>Simple</function></term> <listitem> <para> The base class for most of the simple widgets. Provides a rectangular area with a settable mouse cursor and special border. </para> </listitem> </varlistentry> <varlistentry> <term><function>StripChart</function></term> <listitem> <para> A real time data graph that will automatically update and scroll. </para> </listitem> </varlistentry> <varlistentry> <term><function>Toggle</function></term> <listitem> <para> A push button that contains state information. Toggles may also be used as "radio buttons" to implement a "one of many" or "zero or one of many" group of buttons. This widget can display a multi-line string or a bitmap or pixmap image. </para> </listitem> </varlistentry> </variablelist> <!-- End of CH3.Intr --> <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="Command.xml"/> <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="Grip.xml"/> <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="Label.xml"/> <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="List.xml"/> <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="Panner.xml"/> <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="Repeater.xml"/> <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="Scrollbar.xml"/> <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="Simple.xml"/> <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="StripChart.xml"/> <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="Toggle.xml"/> </chapter>