[Libreoffice] Implementing new symbols in charts

Regina Henschel rb.henschel at t-online.de
Fri Aug 5 07:22:52 PDT 2011

Hi all,

I have got a prototype implementation of the new symbols now, that works 
for me. But it contains a decision for which I want to know your opinion 
before I work further on it.

The current standard symbols are all based on a square. Changing of 
width or height in the data series or data point property dialog scales 
this square to an rectangle in the given size.

In my prototype for the horizontal-bar and the vertical-bar the width 
and the height in that dialog is still a square, but the bars are drawn 
as rectangle with 1/5 height or width respectively. In the chart itself 
the snap rectangle is not a square but corresponds to the drawn 
rectangle. This has the advantage, that the size remains the same, when 
the user switches between the symbols, and the disadvantage, that the 
drawn height or width is only a 1/5 of the size in the underlying 
graphic in the model. I have seen such behavior in Excel and Gnumeric 
too, perhaps because they do not allow to set width and height 

I have not tried the way, to implement a bar as scaled square. That 
seemed more difficult to me. It would lead to the situation, that you 
need a case distinction on the symbol type every time when calling the 
shape factory and the needed size has to be maintained in different places.

See also 

Do you agree with my decision?

Kind regards

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