568 lines
14 KiB
XML
568 lines
14 KiB
XML
<sect2 id="MenuButton_Widget">
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<title>MenuButton Widget</title>
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<!-- .XS -->
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<!-- MenuButton Widget -->
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<!-- .XE -->
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<!-- .IN "MenuButton widget" "" "@DEF@" -->
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<!-- .sp -->
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<literallayout class="monospaced">
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<!-- .TA 2.0i -->
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<!-- .ta 2.0i -->
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Application Header file <X11/Xaw/MenuButton.h>
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<!-- .IN "MenuButton.h" "" -->
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Class Header file <X11/Xaw/MenuButtonP.h>
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<!-- .IN "MenuButtonP.h" "" -->
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Class menuButtonWidgetClass
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<!-- .IN "menuButtonWidgetClass" "" -->
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Class Name MenuButton
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<!-- .IN "MenuButton widget" "class name" -->
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Superclass Command
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</literallayout>
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<para>
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<!-- .LP -->
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<!-- .sp -->
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The MenuButton widget is an area, often rectangular,
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that displays a graphic. The graphic may be a text
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string containing multiple lines of characters in an 8
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bit or 16 bit character set (to be displayed with a
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<emphasis remap='I'>font</emphasis>), or in a multi-byte encoding (for use with
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a <emphasis remap='I'>fontset</emphasis>). The graphic may also be a bitmap or
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pixmap.
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</para>
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<para>
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<!-- .LP -->
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When the pointer cursor is on a MenuButton widget, the
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MenuButton becomes highlighted by drawing a rectangle
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around its perimeter. This highlighting indicates
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that the MenuButton is ready for selection. When a
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pointer button is pressed, the MenuButton widget will
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pop up the menu named in the <function>menuName</function> resource.
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</para>
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<sect3 id="Resources">
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<title>Resources</title>
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<para>
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<!-- .LP -->
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When creating a MenuButton widget instance,
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the following resources are retrieved from the argument list
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or from the resource database:
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</para>
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<para>
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<!-- .LP -->
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<!-- .IN "MenuButton widget" "resources" -->
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<informaltable>
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<tgroup cols='5' align='center'>
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<colspec colname='c1'/>
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<colspec colname='c2'/>
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<colspec colname='c3'/>
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<colspec colname='c4'/>
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<colspec colname='c5'/>
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<thead>
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<row>
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<entry>Name</entry>
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<entry>Class</entry>
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<entry>Type</entry>
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<entry>Notes</entry>
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<entry>Default Value</entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry>accelerators</entry>
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<entry>Accelerators</entry>
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<entry>AcceleratorTable</entry>
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<entry></entry>
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<entry>NULL</entry>
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</row>
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<row>
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<entry>ancestorSensitive</entry>
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<entry>AncestorSensitive</entry>
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<entry>Boolean</entry>
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<entry>D</entry>
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<entry>True</entry>
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</row>
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<row>
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<entry>background</entry>
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<entry>Background</entry>
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<entry>Pixel</entry>
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<entry></entry>
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<entry>XtDefaultBackground</entry>
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</row>
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<row>
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<entry>backgroundPixmap</entry>
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<entry>Pixmap</entry>
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<entry>Pixmap</entry>
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<entry></entry>
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<entry>XtUnspecifiedPixmap</entry>
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</row>
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<row>
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<entry>bitmap</entry>
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<entry>Bitmap</entry>
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<entry>Pixmap</entry>
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<entry></entry>
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<entry>None</entry>
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</row>
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<row>
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<entry>borderColor</entry>
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<entry>BorderColor</entry>
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<entry>Pixel</entry>
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<entry></entry>
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<entry>XtDefaultForeground</entry>
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</row>
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<row>
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<entry>borderPixmap</entry>
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<entry>Pixmap</entry>
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<entry>Pixmap</entry>
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<entry></entry>
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<entry>XtUnspecifiedPixmap</entry>
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</row>
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<row>
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<entry>borderWidth</entry>
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<entry>BorderWidth</entry>
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<entry>Dimension</entry>
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<entry></entry>
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<entry>1</entry>
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</row>
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<row>
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<entry>callback</entry>
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<entry>Callback</entry>
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<entry>XtCallbackList</entry>
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<entry></entry>
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<entry>NULL</entry>
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</row>
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<row>
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<entry>colormap</entry>
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<entry>Colormap</entry>
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<entry>Colormap</entry>
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<entry></entry>
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<entry>Parent's Colormap</entry>
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</row>
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<row>
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<entry>cornerRoundPercent</entry>
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<entry>CornerRoundPercent</entry>
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<entry>Dimension</entry>
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<entry></entry>
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<entry>25</entry>
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</row>
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<row>
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<entry>cursor</entry>
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<entry>Cursor</entry>
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<entry>Cursor</entry>
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<entry></entry>
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<entry>None</entry>
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</row>
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<row>
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<entry>cursorName</entry>
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<entry>Cursor</entry>
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<entry>String</entry>
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<entry></entry>
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<entry>None</entry>
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</row>
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<row>
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<entry>depth</entry>
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<entry>Depth</entry>
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<entry>int</entry>
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<entry>C</entry>
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<entry>Parent's Depth</entry>
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</row>
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<row>
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<entry>destroyCallback</entry>
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<entry>Callback</entry>
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<entry>XtCallbackList</entry>
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<entry></entry>
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<entry>NULL</entry>
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</row>
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<row>
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<entry>encoding</entry>
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<entry>Encoding</entry>
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<entry>UnsignedChar</entry>
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<entry></entry>
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<entry>XawTextEncoding8bit</entry>
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</row>
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<row>
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<entry>font</entry>
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<entry>Font</entry>
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<entry>XFontStruct</entry>
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<entry></entry>
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<entry>XtDefaultFont</entry>
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</row>
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<row>
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<entry>fontSet</entry>
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<entry>FontSet</entry>
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<entry>XFontSet</entry>
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<entry></entry>
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<entry>XtDefaultFontSet</entry>
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</row>
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<row>
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<entry>foreground</entry>
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<entry>Foreground</entry>
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<entry>Pixel</entry>
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<entry></entry>
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<entry>XtDefaultForeground</entry>
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</row>
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<row>
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<entry>height</entry>
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<entry>Height</entry>
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<entry>Dimension</entry>
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<entry>A</entry>
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<entry>graphic height + 2 * <function>internalHeight</function></entry>
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</row>
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<row>
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<entry>highlightThickness</entry>
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<entry>Thickness</entry>
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<entry>Dimension</entry>
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<entry>A</entry>
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<entry>2 (0 if Shaped)</entry>
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</row>
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<row>
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<entry>insensitiveBorder</entry>
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<entry>Insensitive</entry>
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<entry>Pixmap</entry>
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<entry></entry>
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<entry>GreyPixmap</entry>
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</row>
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<row>
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<entry>internalHeight</entry>
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<entry>Height</entry>
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<entry>Dimension</entry>
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<entry></entry>
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<entry>2</entry>
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</row>
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<row>
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<entry>internalWidth</entry>
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<entry>Width</entry>
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<entry>Dimension</entry>
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<entry></entry>
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<entry>4</entry>
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</row>
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<row>
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<entry>international</entry>
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<entry>International</entry>
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<entry>Boolean</entry>
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<entry>C</entry>
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<entry>False</entry>
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</row>
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<row>
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<entry>justify</entry>
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<entry>Justify</entry>
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<entry>Justify</entry>
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<entry></entry>
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<entry>XtJustifyCenter (center)</entry>
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</row>
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<row>
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<entry>label</entry>
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<entry>Label</entry>
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<entry>String</entry>
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<entry></entry>
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<entry>name of widget</entry>
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</row>
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<row>
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<entry>leftBitmap</entry>
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<entry>LeftBitmap</entry>
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<entry>Bitmap</entry>
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<entry></entry>
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<entry>None</entry>
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</row>
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<row>
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<entry>mappedWhenManaged</entry>
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<entry>MappedWhenManaged</entry>
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<entry>Boolean</entry>
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<entry></entry>
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<entry>True</entry>
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</row>
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<row>
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<entry>menuName</entry>
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<entry>MenuName</entry>
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<entry>String</entry>
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<entry></entry>
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<entry>"menu"</entry>
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</row>
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<row>
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<entry>pointerColor</entry>
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<entry>Foreground</entry>
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<entry>Pixel</entry>
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<entry></entry>
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<entry>XtDefaultForeground</entry>
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</row>
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<row>
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<entry>pointerColorBackground</entry>
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<entry>Background</entry>
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<entry>Pixel</entry>
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<entry></entry>
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<entry>XtDefaultBackground</entry>
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</row>
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<row>
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<entry>resize</entry>
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<entry>Resize</entry>
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<entry>Boolean</entry>
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<entry></entry>
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<entry>True</entry>
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</row>
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<row>
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<entry>screen</entry>
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<entry>Screen</entry>
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<entry>Screen</entry>
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<entry>R</entry>
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<entry>Parent's Screen</entry>
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</row>
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<row>
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<entry>sensitive</entry>
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<entry>Sensitive</entry>
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<entry>Boolean</entry>
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<entry></entry>
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<entry>True</entry>
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</row>
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<row>
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<entry>shapeStype</entry>
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<entry>ShapeStyle</entry>
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<entry>ShapeStyle</entry>
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<entry></entry>
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<entry>Rectangle</entry>
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</row>
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<row>
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<entry>translations</entry>
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<entry>Translations</entry>
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<entry>TranslationTable</entry>
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<entry></entry>
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<entry>See below</entry>
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</row>
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<row>
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<entry>width</entry>
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<entry>Width</entry>
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<entry>Dimension</entry>
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<entry>A</entry>
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<entry>graphic width + 2 * <function>internalWidth</function></entry>
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</row>
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<row>
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<entry>x</entry>
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<entry>Position</entry>
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<entry>Position</entry>
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<entry></entry>
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<entry>0</entry>
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</row>
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<row>
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<entry>y</entry>
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<entry>Position</entry>
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<entry>Position</entry>
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<entry></entry>
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<entry>0</entry>
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</row>
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<row>
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<entry>_</entry>
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</row>
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</tbody>
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</tgroup>
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</informaltable>
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<!-- .Ac -->
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<!-- .As -->
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<!-- .Bg -->
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<!-- .Gp -->
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<!-- .Bm -->
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<!-- .Bc -->
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<!-- .Bp -->
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<!-- .Bw -->
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<!-- .Cb -->
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<!-- .Cm -->
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<!-- .Cr -->
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<!-- .Cu -->
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<!-- .Cn -->
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<!-- .Dp -->
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<!-- .Dc -->
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<!-- .Lf -->
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<!-- .Ls -->
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<!-- .Lg -->
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<!-- .Hw -->
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<!-- .Ht -->
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<!-- .Ib -->
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<!-- .Ih -->
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<!-- .In -->
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<!-- .Ju -->
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<!-- .La -->
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<!-- .Mm -->
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<variablelist>
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<varlistentry>
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<term>
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<function>menuName</function>
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</term>
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<listitem>
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<para>
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The name of a popup shell to popup as a menu. The MenuButton
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will search for this name using <function>XtNameToWidget</function> starting
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with itself as the reference widget. If the search is
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unsuccessful the widget will continue up the widget tree using
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each of its ancestors as the reference widget passed to
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<function>XtNameToWidget</function>. If no widget of called <function>menuName</function> is
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found by this algorithm, the widget will print a warning message
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and give up. When the menu is found it will be popped up
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exclusive and spring_loaded. The MenuButton widget does not
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copy the value of this resource into newly allocated memory. The
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application programmer must pass the resource value in
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nonvolatile memory.
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<!-- .Pf -->
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<!-- .Pb -->
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<!-- .Re -->
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<!-- .Sc -->
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<!-- .Se -->
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<!-- .Ss -->
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<!-- .Tr -->
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<!-- .Xy -->
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</para>
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</sect3>
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<sect3 id="MenuButton_Actions">
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<title>MenuButton Actions</title>
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<!-- .IN "MenuButton widget" "actions" -->
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<para>
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<!-- .LP -->
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The MenuButton widget supports the following actions:
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</para>
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<itemizedlist>
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<listitem>
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<para>
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Switching the button between the foreground and background
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colors with <function>set</function> and <function>unset</function>
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</para>
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</listitem>
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<listitem>
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<para>
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Processing application callbacks with <function>notify</function>
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</para>
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</listitem>
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<listitem>
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<para>
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Switching the internal border between highlighted
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and unhighlighted states with <function>highlight</function> and <function>unhighlight</function>
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</para>
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</listitem>
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<listitem>
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<para>
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Popping up a menu with <function>PopupMenu</function>
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</para>
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</listitem>
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</itemizedlist>
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<para>
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<!-- .LP -->
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The following are the default translation bindings used by the
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MenuButton widget:
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</para>
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<para>
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<!-- .LP -->
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<!-- .sp -->
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<literallayout class="monospaced">
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<!-- .TA .5i 2.25i -->
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<!-- .ta .5i 2.25i -->
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<EnterWindow>: highlight(\|)
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<LeaveWindow>: reset(\|)
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<BtnDown>: reset(\|) PopupMenu(\)
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</literallayout>
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</para>
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</sect3>
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<sect3 id="MenuButton_Actions_b">
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<title>MenuButton Actions_b</title>
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<para>
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<!-- .LP -->
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The full list of actions supported by MenuButton is:
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<variablelist>
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<varlistentry>
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<term>
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<function>highlight</function>(<function>condition</function>)
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</term>
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<listitem>
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<para>
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Displays the internal highlight border in the color (<function>foreground</function>
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or <function>background</function> ) that contrasts with the interior color of the
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Command widget. The conditions <function>WhenUnset</function> and <function>Always</function> are
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understood by this action procedure. If no argument is passed,
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<function>WhenUnset</function> is assumed.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<function>unhighlight</function>(\|)
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</term>
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<listitem>
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<para>
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Displays the internal highlight border in the color (<function>XtNforeground</function>
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or <function>background</function> ) that matches the interior color of the
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MenuButton widget.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<function>set</function>(\|)
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</term>
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<listitem>
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<para>
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Enters the <function>set</function> state, in which <function>notify</function> is possible. This
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action causes the button to display its interior in the
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<function>foreground</function> color. The label or bitmap is displayed in the
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<function>background</function> color.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<function>unset</function>(\|)
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</term>
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<listitem>
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<para>
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Cancels the <emphasis remap='I'>set</emphasis> state and displays the interior of the button in the
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<function>background</function> color. The label or bitmap is displayed in the
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<function>foreground</function> color.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<function>reset</function>(\|)
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</term>
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<listitem>
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<para>
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Cancels any <function>set</function> or <function>highlight</function> and displays the interior of the
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button in the <function>background</function> color, with the label displayed in the
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<function>foreground</function> color.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<function>notify</function>(\|)
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</term>
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<listitem>
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<para>
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When the button is in the <function>set</function> state this action calls all functions in
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the callback list named by the <function>callback</function> resource. The value of
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the call_data argument in these callback functions is undefined.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<function>PopupMenu</function>(\|)
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</term>
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<listitem>
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<para>
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Pops up the menu specified by the <function>menuName</function> resource.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</para>
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<para>
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<!-- .LP -->
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The MenuButton widget does not place a server grab on itself.
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Instead, PopupMenu is registered as a grab action.
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As a result, clients which popup menus without using XtMenuPopup
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or MenuPopup or PopupMenu in translations will fail to have a grab active.
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They should make a call to XtRegisterGrabAction on the appropriate action
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in the application initialization routine, or use a different translation.
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<!-- .bp -->
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</para>
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</sect3>
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</sect2>
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