Calendar Options

See Also

Calendar Section Attributes

Overview

Calendar Sections provide a calendar interface to allow for the creation, display, update and deletion of appointments and other time planner events.

From Lianja v8.0, event resources such as rooms can also be included.

Lianja Web UI Calendar Demo

example_webapp4 App

The 'Lianja Web UI Calendar Demo' (example_webapp4) is included in the Lianja App Builder distribution to demonstrate the use of a Calendar Section.

Calendar Sections are also included in 'Lianja Mobile App Demo' (lianja_mobiledemo) and 'Lianja Web UI Page Center Demo' (example_pagecenter").

This single Page App has a main Form Section for the southwind!employees table and a related Calendar Section for that employee's appointments.

Calendar Table

The example_webapp4 App uses the southwind!employees_calendar table. Its structure is listed below. Your table can have different field names and additional fields, but the data type of the fields used by the Calendar Section should match those shown here. The width of the character fields can be altered as required.

Field	Field Name	Type	Width	Notes
1	LASTNAME	Character	20	Related key field. A numeric related field can also be used. Not required if no related parent Section.
2	EVENTTITLE	Character	80	The title for the event that will be displayed in the calendar.
3	EVENTSTART	DateTime	8	The start date and time of the event.
4	EVENTEND	DateTime	8	The end date and time of the event.
5	EVENTREPEAT	Integer	11	Non 0 value flags the event as a repeating event. Repeating events are repeated monthly to the end of the event year.
6	EVENTALLDAY	Logical	1	Whether the event lasts all day.
7	EVENTTYPE	Character	40	The category type for the event.
8	EVENTRESOURCE	Character	40	The resource for the event. From v8.0.

Using a Calendar Section

The controls at the top of the Calendar Section are used to enter details about an event. Clicking on an event in the main calendar loads the event's details into the controls.

Control	Description
Event Resource	Combobox with event resources. Displayed when the 'Event resource choices' Section attribute is defined. From v8.0.
Event Type	Combobox with event types. Displayed when the 'Event type choices' Section attribute is defined.
Event Title	Textbox to enter the title for the event.
Start Date	Date picker to select the start date for the event.
End Date	Date picker to select the end date for the event.
Start Time	Time picker to select the start time for the event.
End Time	Time picker to select the end time for the event.
All Day	Checkbox to flag whether the event lasts all day.
Repeat	Checkbox to flag whether the event is a repeating event.

The Event Resource Panel displays available event resources when the 'Event resource choices' attribute is populated. Event resources are displayed as buttons. Clicking a button filters the calendar display baseed on the selected resource. From v8.0.

The buttons below the controls, handle data and display operations.

Button	Description
New	Populates the controls with the current date and default times.
Delete	Deletes the event currently displayed in the controls.
Update	Saves the event currently displayed in the controls.
<	Calendar display goes back one year. Not available on mobile.
<	Calendar display goes back one month, one week or one day depending on the current view (Month, Week, Day).
>	Calendar display goes forward one month, one week or one day depending on the current view (Month, Week, Day).
>	Calendar display goes forward one year. Not available on mobile.
Today	Calendar display goes to Today.
Day	Calendar display goes to Day view.
Week	Calendar display goes to Week view.
Month	Calendar display goes to Month view.

Calendar Section on mobile

On the Lianja Mobile Client, the event detail controls are displayed in an overlay along with the buttons for Cancel, Delete and Add or Update, depending on the operation.

Calendar Section Attributes

From Lianja v8.0, the Page Builder Assistant has been integrated into the App Inspector and expanded to give speedy access to attributes and event delegates.

Or, the attributes can be accessed in the App Inspector Attributes tab for the section:

Or, if the App Inspector is closed, double-click the section header to display the attributes dialog:

Alternatively, as a webview based section, click the keyboard icon in the Calendar section header to access the Custom Web Component Parameters Editor to set the attributes:

Double-click the Section header or click the cog icon to access the Section Attributes.

The database and table attributes determine the data binding.

The Calendar Section options are described here.

Default view

The starting view for the calendar. 'Month', 'Week' or 'Day' can be selected, the default is 'Month'. e.g.

Month

Event resource column

From v8.0. Optional. The name of a character column. It corresponds to the 'Event Resource' control. The control is a combobox based on Event resource choices. The calendar can also be filtered by the event resource, by clicking on an Event Resource button. e.g.

eventresource

Event resource caption

From v8.0. Optional. A character string for the 'Event Resource' header caption. If not specified, the default is 'Resource'. Only displayed when an Event resource column is specified. e.g.

Room

Event resource choices

From v8.0. Required when Event resource column is specified, otherwise optional. A comma separated list or a SQL statement. e.g.

,Booking:#3788d8:white,Sales Meeting:yellow:black,Meeting,
Vacation:gray:lightgreen,Sick:red:yellow,Appointment:green:white,Other

Event resource width

From v8.0. Optional. The width of the 'Event Resource' panel in pixels. If 0, defaults to 120 pixels. e.g.

200

Event type column

Required. The name of a character column. It corresponds to the 'Event Type' control. The control is a free-entry textbox unless the Event type choices is populated, in which case it is a combobox and a choice must be made from the list. The calendar can also be filtered by the event type, by specifying a valid event type in the Event type value attribute. e.g.

eventtype

Event type caption

From v8.0. Optional. A character string for the 'Event Type' header caption. If not specified, the default is 'Type'. e.g.

Category

Event type choices

Optional. These are choices for the Event type column and should be specified as a list of comma-separated character strings postfixed with optional background and foreground colors in the format :background:foreground. The colors are character strings and can be any of the standard web colors e.g. "pink", "lightgreen" or an HTML/CSS style color code e.g. "#cfcfcf". Events will be displayed in the calendar body using their event type's colors.

Note that if the list starts with a comma, a blank event type will be displayed until the combobox is expanded. e.g.

,Sales Meeting:yellow:black,Meeting,Vacation,Sick:red:yellow,Appointment:green:white,Other

Event title column

Required. The name of a character column. It corresponds to the 'Event Title' control, a free-entry textbox. e.g.

eventtitle

Event start column

Required. The name of a datetime column. It corresponds to the 'Start Date' and 'Start Time' date and time picker controls. e.g.

eventstart

Event end column

Required. The name of a datetime column. It corresponds to the 'End Date' and 'End Time' date and time picker controls. e.g.

eventend

Event repeat column

Required. The name of an integer or numeric column. It corresponds to the 'Repeat' checkbox control. e.g.

eventrepeat

Event allday column

Required. The name of a logical column. It corresponds to the 'All Day' checkbox control. e.g.

eventallday

Event key column

Optional.

Event type value

Optional. If specified, it should be a character string and correspond to a valid Event Type. Only events with a matching Event Type will be displayed in the calendar. e.g.

Vacation

Autosize

If checked to True, the height of the calendar cells will be autosized to fit the Section size. e.g.

True

Other options

Optional. User defined options can be specified as name=value comma-separated pairs. These will be passed as parameters to the calendar_view.rsp script. e.g.

region=US,timezone=EST

Click delegate

Optional. The name of a delegate script to be called when a cell in the calendar is clicked. Data is passed to the click delegate in JSON format. e.g.

calendar_click

function calendar_click(data)
{
	// You can handle a custom calendar cell click event here
	Lianja.writeLog(data);
};

{"database":"southwind","table":"employees_calendar","columns":"eventtitle,eventstart,eventend,eventrepeat,eventallday,eventtype",
"keyvalue":"Buchanan","keyexpr":"lastname","title":"Meeting","start_date":"2015-09-08","end_date":"2015-09-08","start_time":"09:00",
"end_time":"17:00","allDay":"true","repeat":"false","rowid":"42","id":0,"action":"eventclick","sectionid":"section2",
"eventtype":"eventtype","eventtypevalue":"Sales Meeting"}

Dynamic day backcolor

Optional. The name of a function in the Custom delegate library that returns dates and their associated background colors, allowing specific dates to be highlighted. e.g.

getdatecolors

The function should accept a parameter which will have one of two values: 'dates' or 'colors'.

If the parameter is 'dates', the function should return a string containing comma-separated ISO format character string dates. These can contain a single '*' to indicate either all years, all months or all days. The strings 'sunday' and 'saturday' are also recognized.

If the parameter is 'colors', the function should return a string containing comma-separated color strings (e.g. 'red' or '#FF0000'), one for each date in the dates string. The colors will be applied to the dates in order. e.g.

function getdatecolors(para1)
	if para1 = "dates"
		return ['2015-*-28','sunday','&(strftime("%F",dtoc(date())))','*-09-01']
	else
		return ['purple','yellow','blue','#FF0000']
	endif
endfunc

In the example above, the 28th of every month in 2015 will have a purple background, all Sundays will have a yellow background, the current date will have a blue background and September 1st every year will have a red background.

Dynamic event backcolor

Optional. The name of a function in the Custom delegate library that returns a color string (e.g. 'red' or '#FF0000') to be used as the background color for a specific event type. e.g.

geteventback

The event type is passed as a parameter to the function. e.g.

function geteventback(para1)
	do case
	case para1 = "UK Bank Holiday"
		return 'red'
	case para1 = "US Public Holiday"
		return 'pink'
	otherwise // all other event types
		return 'white'
	endcase
endfunc

Note that event type / color pairs can also be specified in the Event type choices as described above.

Dynamic event forecolor

Optional. The name of a function in the Custom delegate library that returns a color string (e.g. 'red' or '#FF0000') to be used as the foreground color for a specific event type. e.g.

geteventfore

The event type is passed as a parameter to the function. e.g.

function geteventfore(para1)
	do case
	case para1 = "UK Bank Holiday"
		return 'pink'
	case para1 = "US Public Holiday"
		return 'white'
	otherwise // all other event types
		return 'black'
	endcase
endfunc

Note that event type / color pairs can also be specified in the Event type choices as described above.

Custom delegate library

Optional, required if the Dynamic day and even color functions are specified. The name of a custom library file (Lianja/VFP prg) containing the day and event dynamic color delegates. Clicking the [...] button will create a file in the App and open it in the Script Editor in the Apps workspace. e.g.

libcal_page1_section2.prg

Filter

Optional. A valid filter expression that will be used in a SQL SELECT statement to restrict the records displayed in the calendar. e.g.

eventtitle="US Public Holiday" or eventtitle='UK Bank Holiday'

Further Customization

The Calendar Section is a WebViewWidget and uses the scripts 'calendar_view.rsp' and 'calendar_controller.prg'. These can be found in the Lianja Library sub-directories:

Client	Location
App Builder	\lianja\library\
App Center	\lianja\cloudserver\tenants\public\library
Web/Mobile Clients	\lianja\cloudserver\tenants\public\wwwroot\library

So, for example, if you want to pass Other options to your calendar, you can add additional parameter checks at the start of calendar_view.rsp and handle them accordingly. Or you could put additional patterns into calendar_view.rsp's date background color handling.