XOSD_DISPLAY(3xosd) XOSD_DISPLAY(3xosd) NAME xosd_display - Display data to an XOSD window SYNOPSIS #include <xosd.h> int xosd_display (xosd *osd, int line, xosd_command command, ...); DESCRIPTION xosd_display displays either a string, a percentage bar (like a progress bar) or a slider on an X display. The data is displayed in a borderless shaped-window, so it appears to float on top of the other windows, like the on-screen displays found in many televisions. Users cannot interact with the display in any way. The data is displayed until the timeout limit, set by calling xosd_set_timeout(3xosd), is reached, but xosd_display returns immediately. If blocking is required xosd_wait_until_no_display(3xosd) should be called after xosd_display. A window that is displaying data can be hidden by call- ing xosd_hide(3xosd). The type of data displayed is determined by the command argument. There are two types of data that can be displayed: text or integers. Displaying Textual Data Text is normally displayed by passing XOSD_string as the argument to com- mand, followed by a string in UTF-8 format. If formatted text is desired, pass XOSD_printf as the argument to command, followed by string that has the same format as printf(3), and as many additional arguments as is re- quired by the format string. Displaying Integer Values Integer values (which must be within the range 0 to 100) can be displayed in two ways: a percentage-bar or a slider. A percentage bar looks like a volume display on a TV, and is created by passing XOSD_percentage as the argument to command. A slider (see the XOSD plug-in for xmms(1) for an ex- ample) is created by passing XOSD_slider as the argument to command. An int between 0 and 100 is expected as the final argument when either XOSD_per- centage or XOSD_slider is passed as the argument to command. ARGUMENTS osd The XOSD window to use as the display. line The line of the display to change. The value of line must be less than number_lines, set in the call to xosd_create(3xosd). command One of XOSD_percentage, XOSD_slider or XOSD_string. If the value of command is XOSD_string, then the next argument should be a string in UTF-8 format. If XOSD_percentage or XOSD_slider is given then an int between 1 and 100 is expected as the next argument. RETURN VALUE If the command is either XOSD_percentage or XOSD_slider then the integer value of the bar or slider is returned (between 1 and 100). For XOSD_string and XOSD_printf the number of characters written to the display is re- turned. On error -1 is returned and xosd_error is set to indicate the reason for the error. ENVIRONMENT char *xosd_error A string describing the error, if one occurred. enum xosd_command The type of information that can be displayed, defined as an enumer- ated type. There are four values defined: XOSD_percentage, XOSD_string, XOSD_printf, and XOSD_slider. AUTHORS The XOSD library was originally written by Andre Renaud, and is currently maintained by Tim Wright. This document was written by Michael JasonSmith. BUGS There are no known bugs with xosd_display. Bug reports can be sent to <xosd@ignavus.net>. SEE ALSO xosd_create(3xosd), xosd_set_timeout(3xosd), xosd_wait_until_no_dis- play(3xosd), xosd_hide(3xosd), printf(3) XOSD_DISPLAY(3xosd)
NAME | SYNOPSIS | DESCRIPTION | ARGUMENTS | RETURN VALUE | ENVIRONMENT | AUTHORS | BUGS | SEE ALSO
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