mitem_current.3x.html 5.9 KB

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  40. <H1>mitem_current 3x</H1>
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  42. <PRE>
  43. <!-- Manpage converted by man2html 3.0.1 -->
  44. <STRONG><A HREF="mitem_current.3x.html">mitem_current(3x)</A></STRONG> <STRONG><A HREF="mitem_current.3x.html">mitem_current(3x)</A></STRONG>
  45. </PRE>
  46. <H2>NAME</H2><PRE>
  47. <STRONG>mitem_current</STRONG> - set and get current_menu_item
  48. </PRE>
  49. <H2>SYNOPSIS</H2><PRE>
  50. <STRONG>#include</STRONG> <STRONG>&lt;menu.h&gt;</STRONG>
  51. int set_current_item(MENU *menu, const ITEM *item);
  52. ITEM *current_item(const MENU *menu);
  53. int set_top_row(MENU *menu, int row);
  54. int top_row(const MENU *menu);
  55. int item_index(const ITEM *item);
  56. </PRE>
  57. <H2>DESCRIPTION</H2><PRE>
  58. The function <STRONG>set_current_item</STRONG> sets the current item (the
  59. item on which the menu cursor is positioned). <STRONG>cur-</STRONG>
  60. <STRONG>rent_item</STRONG> returns a pointer to the current item in the
  61. given menu.
  62. The function <STRONG>set_top_row</STRONG> sets the top row of the menu to
  63. show the given row (the top row is initially 0, and is
  64. reset to this value whenever the <STRONG>O_ROWMAJOR</STRONG> option is tog-
  65. gled). The item leftmost on the given row becomes cur-
  66. rent. The function <STRONG>top_row</STRONG> returns the number of the top
  67. menu row being displayed.
  68. The function <STRONG>item_index</STRONG> returns the (zero-origin) index of
  69. <EM>item</EM> in the menu's item pointer list.
  70. </PRE>
  71. <H2>RETURN VALUE</H2><PRE>
  72. <STRONG>current_item</STRONG> returns a pointer (which may be <STRONG>NULL</STRONG>). It
  73. does not set errno.
  74. <STRONG>top_row</STRONG> and <STRONG>item_index</STRONG> return <STRONG>ERR</STRONG> (the general <STRONG>curses</STRONG>
  75. error value) if their <EM>menu</EM> parameter is <STRONG>NULL</STRONG>.
  76. <STRONG>set_current_item</STRONG> and <STRONG>set_top_row</STRONG> return one of the follow-
  77. ing:
  78. <STRONG>E_OK</STRONG> The routine succeeded.
  79. <STRONG>E_BAD_ARGUMENT</STRONG>
  80. Routine detected an incorrect or out-of-range argu-
  81. ment.
  82. <STRONG>E_BAD_STATE</STRONG>
  83. Routine was called from an initialization or termina-
  84. tion function.
  85. <STRONG>E_NOT_CONNECTED</STRONG>
  86. No items are connected to the menu.
  87. <STRONG>E_SYSTEM_ERROR</STRONG>
  88. System error occurred (see <STRONG>errno</STRONG>).
  89. </PRE>
  90. <H2>SEE ALSO</H2><PRE>
  91. <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="menu.3x.html">menu(3x)</A></STRONG>.
  92. </PRE>
  93. <H2>NOTES</H2><PRE>
  94. The header file <STRONG>&lt;menu.h&gt;</STRONG> automatically includes the header
  95. file <STRONG>&lt;curses.h&gt;</STRONG>.
  96. </PRE>
  97. <H2>PORTABILITY</H2><PRE>
  98. These routines emulate the System V menu library. They
  99. were not supported on Version 7 or BSD versions.
  100. The SVr4 menu library documentation specifies the <STRONG>top_row</STRONG>
  101. and <STRONG>index_item</STRONG> error value as -1 (which is the value of
  102. <STRONG>ERR</STRONG>).
  103. </PRE>
  104. <H2>AUTHORS</H2><PRE>
  105. Juergen Pfeifer. Manual pages and adaptation for new
  106. curses by Eric S. Raymond.
  107. <STRONG><A HREF="mitem_current.3x.html">mitem_current(3x)</A></STRONG>
  108. </PRE>
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