DrGeo use case: constructing a sketch
Last updated at 9:14 pm UTC on 4 October 2018
What happens if I execute
1. Method #initialize
drgeo := DrGeo applicationToolbarless.
"We do want it to be on the front"
self view setProperty: #morphicLayerNumber toValue: 100.
self view openInWorld.
self view extent: 400@300.
The object 'a DrGeoCanvas' holds in instance variable drgeo a DrGeo object.
What is a DrGeo object?
Answer: It is the application model. More see DrGeo class comment
What is the view object?
Answer: The answer to 'self view' is a DrGeoWindow
By code, then PNG export
| c imageForm aDrGeoWindow outputStream |
c := DrGeoCanvas new.
c view extent: 500@500.
c point: 2 @ 2.
c point: 2 @ 4.
c point: 4 @ 4.
c segment: 2@2 to: 4@4.
aDrGeoWindow := c view.
imageForm := aDrGeoWindow area imageForm.
outputStream := (DrGeoSystem myExportsPath / ('result.png')) ensureDelete binaryWriteStream.
PNGReadWriter putForm: imageForm copy onStream: outputStream.
aDrGeoWindow deleteWithoutConfirmation .
Most recent developer version
| canvas |
canvas := DrGeoCanvas minimal.
canvas point: 0@0.
canvas exportToBitmap: '/tmp/Toto.png'.