Aha, understood! Thanks a lot :) Cheers, Alex On Wed, Jan 27, 2016 at 5:04 PM, Henrik Nergaard <henrik.nergaard@uia.no> wrote:
*From:* Pharo-dev [mailto:pharo-dev-bounces@lists.pharo.org] *On Behalf Of *Henrik Nergaard *Sent:* Wednesday, January 27, 2016 4:47 PM *To:* Pharo Development List <pharo-dev@lists.pharo.org> *Subject:* Re: [Pharo-dev] Morphic magician requested. What is referencePosition?
#referencePostion returns the specified center for the morph in global coordinates.
By default this will be the same as âself bounds origin + (self bounds extent/2.0)â but can have other depending on what #rotationCenter returns.
#referencePositon: on the other hand do not set a new centre, but moves the morph to a new position by using the referencePosition as origin instead of its top left corner.
Example:
| m |
m := Morph new
color: Color orange;
extent: 200@72;
openCenteredInWorld;
yourself.
m on: #click send: #value to: [ m referencePosition: (m referencePosition + (10@10)) ] .
*Looking at Morph>>#handleDropMorph: referencePosition is used to place the dropped morph in centre of the new owner. *
*â*
*observation: *
*â(self transformedFrom: anEvent hand world) globalPointToLocal: aMorph referencePositionâ looks incomplete as it will always be equal to just doing âaMorph referencePositionâ because #transformedFrom: always returns an IdentityTransform where # globalPointToLocal: just returns the point given to it.*
*â*
Correction*:*
#transformedFrom: translates the dropped morph âcenterâ to the receiving morph local coordinates (local from the owning transformationMorph) if it has an owner which is a transformation type Morph (see implementors #tranformFrom:) .
Best regards,
Henrik
*From:* Pharo-dev [mailto:pharo-dev-bounces@lists.pharo.org <pharo-dev-bounces@lists.pharo.org>] *On Behalf Of *Aliaksei Syrel *Sent:* Wednesday, January 27, 2016 4:12 PM *To:* Pharo Development List <pharo-dev@lists.pharo.org> *Subject:* [Pharo-dev] Morphic magician requested. What is referencePosition?
Hi
Do anyone know what is Morph>>#referencePosition and why is it used to handle drag and drop?
Here is what method doc says:
"Return the current reference position of the receiver"
Thanks,
Alex