Hi,
I'm working on a treemap layout in Mondrian. I created the basic functionality but am far from finished.
For the current progress see the following screenshots:
The following is an example of how one sets up the layout:
viewTreemapOn: view
view nodes: self nodes.
view edges: self nodes
from: [ :each | each ]
toAll: [ :each | each children ].
view layout: (MOTreeMapLayoutIncubation withWeightBlock: [ :e |
| model |
model := e model.
model isNil ifTrue: [
0.
]
ifFalse: [
e model entity numberOfLinesOfCode.
].
]).
The tree structure is given by the edges definition. The layout is created with a weight block (lines of code here, but could be anything).
This is the first code that I'm writing with Mondrian, so I'm sure it could be improved in many areas. If anyone sees a problem with how I set up the layout. please do tell. If anyone wants to look at the code in detail please take a look at MOTreeMapLayoutIncubation in my Softwarenaut repository (I'm creating the tree map layout as part of the Softwarenaut port to Pharo):
MCHttpRepository
location: 'http://www.squeaksource.com/Softwarenaut'
user: ''
password: ''
The layout is currently in this repo, if it is more mature, it would be cool to add it to Mondrian itself. I'd like to make it as generic as possible.
Now for some specific questions:
The red colors you see in the screenshots is actually a bug. What I would like to do is only color the leaf nodes, but somehow (my guess is, it has something to do with shape caching?), it also colors the containment blocks.
The way I do it is, while ging through the nodes (MONode) to draw them
If it is a leaf
node shape fillColor: ((Color fromString: '#ff0000') alpha: 0.1).
If it is a containment block:
node shape fillColor: (Color fromString: '#eeeeee').
But somehow all shapes (except the root node) are colored with the red translucent color. Does anyone have an idea why this could be the case?
In general: I'm doing the styling of the nodes (also tried to add some interactivity) directly inside the layout, but I'm not sure if this is the Mondrian way to do this, since normally shape definitions and interaction is defined when creating the view. Is this okay? Or should I do this in another way?
My thought was that I'd like to have a treemap layout with default, nice looking interactions, colors etc. without having to define them outside, when defining the view, so it needs as little setup as possible.
Any inputs in general are greatly appreciated.
Cheers,
Dennis