eraseCDKCalendar3

Usage

Overview

The Cdk calendar widget creates a pop-up calendar. The calendar widget allows the user to traverse through months/years using the cursor keys.

Available functions

activateCDKCalendar

activates the calendar widget and lets the user interact with the widget.

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The calendar widget is a pointer to a non-NULL calendar widget.

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If the actions parameter is passed with a non-NULL value, the characters in the array will be injected into the widget.

To activate the widget interactively pass in a NULL pointer for actions.

If the character entered into this widget is RETURN then this function will return a type of time_t.

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The time_t type is used in the functions defined in the time.h header file. (see localtime or ctime for more information).

If the character entered into this widget was ESCAPE or TAB then this function will return a value of (time_t)-1 and the widget data exitType will be set to vESCAPE_HIT.

destroyCDKCalendar

removes the widget from the screen and frees memory the object used.

drawCDKCalendar

draws the label widget on the screen.

If the box parameter is true, the widget is drawn with a box.

eraseCDKCalendar

removes the widget from the screen. This does NOT destroy the widget.

getCDKCalendarBox

returns whether the widget will be drawn with a box around it.

getCDKCalendarDate

returns the current date the calendar is displaying.

getCDKCalendarDayAttribute

returns the attribute of the day attribute of the calendar.

getCDKCalendarHighlight

returns the attribute of the highlight bar of the scrolling list portion of the widget.

getCDKCalendarMarker

returns the marker set on the calendar by setCDKCalendarMarker.

getCDKCalendarMonthAttribute

returns the attribute of the month attribute of the calendar.

getCDKCalendarYearAttribute

returns the attribute of the year attribute of the calendar.

injectCDKCalendar

injects a single character into the widget.

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The parameter calendar is a pointer to a non-NULL calendar widget.

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The parameter character is the character to inject into the widget.

The return value and side-effect (setting the widget data exitType) depend upon the injected character:

RETURN or TAB

the function returns a value of type time_t (see localtime or ctime for more information). The widget data exitType is set to vNORMAL.

ESCAPE

the function returns (time_t)-1. The widget data exitType is set to vESCAPE_HIT.

Otherwise

unless modified by preprocessing, postprocessing or key bindings, the function returns (time_t)-1. The widget data exitType is set to vEARLY_EXIT.

moveCDKCalendar

moves the given widget to the given position.

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The parameters xpos and ypos are the new position of the widget.

The parameter xpos may be an integer or one of the pre-defined values TOP, BOTTOM, and CENTER.

The parameter ypos may be an integer, or one of the pre-defined values LEFT, RIGHT, and CENTER.

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The parameter relative states whether the xpos/ypos pair is a relative move or an absolute move.

For example, if xpos = 1 and ypos = 2 and relative = TRUE, then the widget would move one row down and two columns right. If the value of relative was FALSE, then the widget would move to the position (1,2).

Do not use the values TOP, BOTTOM, LEFT, RIGHT, or CENTER when relative = TRUE. (weird things may happen).

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The final parameter refresh is a boolean value which states whether the widget will get refreshed after the move.

newCDKCalendar

creates a calendar widget and returns a pointer to it. Parameters:

screen

is the screen you wish this widget to be placed in.

xpos

controls the placement of the object along the horizontal axis. It may be an integer or one of the pre-defined values LEFT, RIGHT, and CENTER.

ypos

controls the placement of the object along the vertical axis. It may be an integer or one of the pre-defined values TOP, BOTTOM, and CENTER.

title

is the string which will be displayed at the top of the widget. The title can be more than one line; just provide a carriage return character at the line break.

year,

month and

day

set the initial date of the calendar.

yearAttrib,

monthAttrib and

dayAttrib

represent the attributes of the year, month, and day respectively.

highlight

sets the highlight of the currently selected day.

box

is true if the widget should be drawn with a box around it.

shadow

turns the shadow on or off around this widget.

If the widget could not be created then a NULL pointer is returned.

positionCDKCalendar

allows the user to move the widget around the screen via the cursor/keypad keys. See cdk_position (3) for key bindings.

removeCDKCalendarMarker

removes a marker from the calendar.

setCDKCalendar

lets the programmer modify certain elements of an existing calendar widget.

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The calendar parameter represents an existing calendar pointer.

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The other parameter names correspond to the same parameter names listed in the newCDKCalendar function.

setCDKCalendarBackgroundAttrib

sets the background attribute of the widget.

The parameter attribute is a curses attribute, e.g., A_BOLD.

setCDKCalendarBackgroundColor

sets the background color of the widget.

The parameter color is in the format of the Cdk format strings.

See cdk_display (3).

setCDKCalendarBox

sets whether the widget will be drawn with a box around it.

setCDKCalendarBoxAttribute

sets the attribute of the box.

setCDKCalendarDate

sets the calendar to the given date.

If the value of the day, month, or year parameters is -1 then the current day, month, or year is used to set the date.

setCDKCalendarDayAttribute

sets the attribute of the day in the calendar.

setCDKCalendarDaysNames

sets the names of the days of the week.

The parameter is a string listing the 2-character abbreviations for the days.

The default value is

"Su Mo Tu We Th Fr Sa"

"Su" (Sunday) is numbered zero internally, making it by default the first day of the week. Set the weekBase member of the widget to select a different day. For example, Monday would be 1, Tuesday 2, etc.

setCDKCalendarHighlight

sets the attribute of the highlight bar of the scrolling list portion of the widget.

setCDKCalendarHorizontalChar

sets the horizontal drawing character for the box to the given character.

setCDKCalendarLLChar

sets the lower left hand corner of the widget's box to the given character.

setCDKCalendarLRChar

sets the lower right hand corner of the widget's box to the given character.

setCDKCalendarMarker

allows the user to set a marker which will be displayed when the month is drawn.

The marker parameter is the attribute to use when drawing the marker. If more than one marker is set on a single day, then the day will blink with the original marker attribute.

setCDKCalendarMonthAttribute

sets the attribute of the month in the calendar.

setCDKCalendarMonthsNames

sets the names of the months of the year.

The parameter is a 13-element array (since indexing starts with 1).

The default values are the English month names, e.g., "January".

setCDKCalendarPostProcess

allows the user to have the widget call a function after the key has been applied to the widget.

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The parameter function is the callback function.

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The parameter data points to data passed to the callback function.

To learn more about post-processing see cdk_process(3).

setCDKCalendarPreProcess

allows the user to have the widget call a function after a key is hit and before the key is applied to the widget.

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The parameter function is the callback function.

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The parameter data points to data passed to the callback function.

To learn more about pre-processing see cdk_process(3).

setCDKCalendarULChar

sets the upper left hand corner of the widget's box to the given character.

setCDKCalendarURChar

sets the upper right hand corner of the widget's box to the given character.

setCDKCalendarVerticalChar

sets the vertical drawing character for the box to the given character.

setCDKCalendarYearAttribute

sets the attribute of the year in the calendar.

Key bindings

When the widget is activated there are several default key bindings which will help the user enter or manipulate the information quickly. The following table outlines the keys and their actions for this widget.