Hi Markus,

Milton worked on the issue. With the last version of Roassal, can you try the following code?

-=-=-=-=-=-=

| b |
Week startDay: #Monday.

b := RTCalendarBuilder new.
b dateShape composite: [ :com |
com add: (RTEllipse new color: [ :d |
d = Date today
ifTrue: [ Color blue trans ]
ifFalse: [Color transparent] ]; size: 18).
com add: (RTLabel new text: [:d| d dayOfMonth];
color: [:d | (d dayOfWeek = 1)
ifTrue: [Color red]
ifFalse: [ Color black ] ]) ].

b showDayNames.
b yearShape composite: [ :comp |
comp add: (RTLabel new text: [ :d | d year ]; height: 20 ).
comp add: (RTBox new color: [ Color blue alpha: 0.1 ]). ] .
b dates: Year current.
b build.
^ b view

-=-=-=-=-=-=

It produces:



Let us know how it goes

Cheers,
Milton & Alexandre


On Apr 21, 2017, at 1:58 PM, Markus Böhm <markus.boehm@gmail.com> wrote:

May I ask: 

Roassal and Pharo are really fantastic. I’m trying to get a grip on it and use it. What makes me think:

In the introduction of the superb “Agile Visualization” book it is stated, that the Roassal OO approach allows for visualizations that are “easily extensible”. I guess compared to hand-crafted, imperative visualizations.

Let’s take an example: RTCalendarBuilder

I noticed that present visualization of week days start with Sunday as first day of week. E.g. in Europe/Germany weeks start on Monday (according ISO8601). We are visually so used to it, that other schemes make us think (not intuitive).

How could I modify this?

P.S.: Especially in calendrical visualizations there will be many (local) variations. So maybe it’s a good example to understand how to easily extend Roassal in above and similar topics as an interested user.

BR Mike

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