Displays a Google calendar.

As Google uses OAuth 2.0, you do not need to provide username and password. Rather, QVisu will display a code in the format AAAA-BBBB when first used, which you must enter on the Google site. You then need to log in and authorize the use of QVisu.

NOTE: If you derive your own version of QVisu and either modify the calendar element or use the OAuth 2 code in your own element, use your own app credentials. Using my credentials for your work is not covered by the copyright.

Syntax

<element type="calendar" position="x,y" height="h">
    <color>...</color>
    <text>...</text>
    <max-days>...</max-days>
    <calendar>...</calendar>
</element>

Elements in bold are mandatory.

element/tag	comment
height	Can be chosen arbitrarily, default is 4. Width is fixed at 4.
color	Background color. Default value is cyan.
max-days	Maximum number of days (from today) for which entries are retrieved.
calendar	The calendar ID (see below)

To retrieve you calendar ID:

Go to your Google Calendar.
On the left side, below "My Calendars", click on the down arrow next to you calendar name.
Click on "Calendar Settings"
In the line "Calendar Address", look for an entry "Calendar ID". The value after the colon is what you need.

Known bugs

On startup, all future entries are retrieved. Later, only updates are requested from Google. For some reason, Google then sends the full list.
The update interval is fixed at 30s.