13 Oct
2014
13 Oct
'14
1:02 a.m.
Hi,
Currently I don't see any way how to tell an element that another one has
been dropped onto him. For example if I want to drag an element into a
container (see example at the end).
Unfortunately in my solution i had to change the behaviour of Trachel
(RTMorph), so could this be in some (better) way incorporated into Roassal
(Trachel)?
My solution is making a subclass
-------------------------------------
TRAbstractMouseEvent subclass: #TRMouseDragDrop
-------------------------------------
And altering mouseDragEnd
-------------------------------------
RTMorph>>rtMouseDragEnd: evt
| ee dropEvent dropShape relativePosition |
"notify the dragged element"
ee := TRMouseDragEnd new.
ee shape: shapeBeingPointed.
ee canvas: trachelCanvas.
ee morph: self.
shapeBeingPointed announce: ee.
"notify the element onto which was the drag performed"
shapeBeingPointed = trachelCanvas
ifFalse: [
shapeBeingPointed element attributes
at: #rtDroppable
ifPresent: [
relativePosition := self relativePositionFor: evt.
dropShape := self shapeWithAction: TRMouseDragDrop forPositionInPixels:
relativePosition.
dropShape = shapeBeingPointed
ifFalse: [
dropEvent := TRMouseDragDrop new
shape: shapeBeingPointed;
canvas: trachelCanvas;
morph: self.
dropShape announce: dropEvent ] ] ].
eventBeginingDragging := nil.
shapeBeingPointed := nil
-------------------------------------
Example (use case) is:
-------------------------------------
view := RTView new.
container := RTBox new size: 200; color: Color white; borderColor: Color
black; element.
group := RTGroup new.
RTNest new on: container nest: group.
container trachelShape size: 200.
box := RTBox new size: 50; color: Color magenta; element.
box translateTo: 250 @ 0.
container @ RTDraggable.
container @ RTResizeable.
box @ RTDraggable.
box attributes at: #rtDroppable put: true.
container
when: TRMouseDragDrop
do: [ :event |
| el |
el := event shape element.
el attributes at: #container ifPresent: [
group remove: el.
].
group add: el.
el attributes at: #container put: group.
].
view canvas
when: TRMouseDragDrop
do: [ :event |
| el |
el := event shape element.
el attributes at: #container ifPresent: [ :parent |
parent remove: el.
el attributes removeKey: #container.
].
].
view
add: container;
add: box.
view open.
-------------------------------------
Also it would be nice to have an option to highlight the drop area. There
is TRMouseEnter/TRMouseLeave but it fires only for the top level shape,
perhaps it should for all? Or less invasive to add
TRMouseDragEnter/TRMouseDragLeave which would work like regular Enter/Leave
but on the next (on z-axis) shape.
Please let me know what you think.
Peter
13 Oct
13 Oct
10:34 a.m.
I have the exactly same need :)
On Mon, Oct 13, 2014 at 1:02 AM, Peter Uhnák <i.uhnak(a)gmail.com> wrote:
Hi,
Currently I don't see any way how to tell an element that another one has
been dropped onto him. For example if I want to drag an element into a
container (see example at the end).
Unfortunately in my solution i had to change the behaviour of Trachel
(RTMorph), so could this be in some (better) way incorporated into Roassal
(Trachel)?
My solution is making a subclass
-------------------------------------
TRAbstractMouseEvent subclass: #TRMouseDragDrop
-------------------------------------
And altering mouseDragEnd
-------------------------------------
RTMorph>>rtMouseDragEnd: evt
| ee dropEvent dropShape relativePosition |
"notify the dragged element"
ee := TRMouseDragEnd new.
ee shape: shapeBeingPointed.
ee canvas: trachelCanvas.
ee morph: self.
shapeBeingPointed announce: ee.
"notify the element onto which was the drag performed"
shapeBeingPointed = trachelCanvas
ifFalse: [
shapeBeingPointed element attributes
at: #rtDroppable
ifPresent: [
relativePosition := self relativePositionFor: evt.
dropShape := self shapeWithAction: TRMouseDragDrop forPositionInPixels:
relativePosition.
dropShape = shapeBeingPointed
ifFalse: [
dropEvent := TRMouseDragDrop new
shape: shapeBeingPointed;
canvas: trachelCanvas;
morph: self.
dropShape announce: dropEvent ] ] ].
eventBeginingDragging := nil.
shapeBeingPointed := nil
-------------------------------------
Example (use case) is:
-------------------------------------
view := RTView new.
container := RTBox new size: 200; color: Color white; borderColor: Color
black; element.
group := RTGroup new.
RTNest new on: container nest: group.
container trachelShape size: 200.
box := RTBox new size: 50; color: Color magenta; element.
box translateTo: 250 @ 0.
container @ RTDraggable.
container @ RTResizeable.
box @ RTDraggable.
box attributes at: #rtDroppable put: true.
container
when: TRMouseDragDrop
do: [ :event |
| el |
el := event shape element.
el attributes at: #container ifPresent: [
group remove: el.
].
group add: el.
el attributes at: #container put: group.
].
view canvas
when: TRMouseDragDrop
do: [ :event |
| el |
el := event shape element.
el attributes at: #container ifPresent: [ :parent |
parent remove: el.
el attributes removeKey: #container.
].
].
view
add: container;
add: box.
view open.
-------------------------------------
Also it would be nice to have an option to highlight the drop area. There
is TRMouseEnter/TRMouseLeave but it fires only for the top level shape,
perhaps it should for all? Or less invasive to add
TRMouseDragEnter/TRMouseDragLeave which would work like regular Enter/Leave
but on the next (on z-axis) shape.
Please let me know what you think.
Peter
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--
Gustavo Santos
4:22 p.m.
Hi Peter and Gustavo!
Having a nice support for drag and drop is difficult. The idea is to go step by step. I
have introduced a new interaction, called RTDragAndDroppable. You simply need to specify
the host element, and the action you want to perform when you drag and drop.
You can run the following example after updating Roassal.
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
v := RTView new.
e1 := (RTBox new size: 10; color: Color gray) element.
e2 := (RTEllipse new size: 30; color: Color blue) element.
e1 @ RTDraggable.
e1 translateTo: 50 @ 50.
v add: e1.
v add: e2.
e2 @ (RTDragAndDroppable new
host: e1;
do: [ :fromElement :toElement |
| newElement alreadyNested |
newElement := (RTBox new size: 20) element.
v add: newElement.
alreadyNested := toElement nestedElements.
toElement unbindNestedElements.
RTNest new
layout: RTGridLayout new;
on: toElement nest: alreadyNested, (Array with: newElement) ]).
v
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
I will work today a bit more on hilighting the receiving element. This is easy to do.
Cheers,
Alexandre
On Oct 12, 2014, at 8:02 PM, Peter Uhnák <i.uhnak(a)gmail.com> wrote:
Hi,
Currently I don't see any way how to tell an element that another one has been
dropped onto him. For example if I want to drag an element into a container (see example
at the end).
Unfortunately in my solution i had to change the behaviour of Trachel (RTMorph), so could
this be in some (better) way incorporated into Roassal (Trachel)?
My solution is making a subclass
-------------------------------------
TRAbstractMouseEvent subclass: #TRMouseDragDrop
-------------------------------------
And altering mouseDragEnd
-------------------------------------
RTMorph>>rtMouseDragEnd: evt
| ee dropEvent dropShape relativePosition |
"notify the dragged element"
ee := TRMouseDragEnd new.
ee shape: shapeBeingPointed.
ee canvas: trachelCanvas.
ee morph: self.
shapeBeingPointed announce: ee.
"notify the element onto which was the drag performed"
shapeBeingPointed = trachelCanvas
ifFalse: [
shapeBeingPointed element attributes
at: #rtDroppable
ifPresent: [
relativePosition := self relativePositionFor: evt.
dropShape := self shapeWithAction: TRMouseDragDrop forPositionInPixels:
relativePosition.
dropShape = shapeBeingPointed
ifFalse: [
dropEvent := TRMouseDragDrop new
shape: shapeBeingPointed;
canvas: trachelCanvas;
morph: self.
dropShape announce: dropEvent ] ] ].
eventBeginingDragging := nil.
shapeBeingPointed := nil
-------------------------------------
Example (use case) is:
-------------------------------------
view := RTView new.
container := RTBox new size: 200; color: Color white; borderColor: Color black; element.
group := RTGroup new.
RTNest new on: container nest: group.
container trachelShape size: 200.
box := RTBox new size: 50; color: Color magenta; element.
box translateTo: 250 @ 0.
container @ RTDraggable.
container @ RTResizeable.
box @ RTDraggable.
box attributes at: #rtDroppable put: true.
container
when: TRMouseDragDrop
do: [ :event |
| el |
el := event shape element.
el attributes at: #container ifPresent: [
group remove: el.
].
group add: el.
el attributes at: #container put: group.
].
view canvas
when: TRMouseDragDrop
do: [ :event |
| el |
el := event shape element.
el attributes at: #container ifPresent: [ :parent |
parent remove: el.
el attributes removeKey: #container.
].
].
view
add: container;
add: box.
view open.
-------------------------------------
Also it would be nice to have an option to highlight the drop area. There is
TRMouseEnter/TRMouseLeave but it fires only for the top level shape, perhaps it should for
all? Or less invasive to add TRMouseDragEnter/TRMouseDragLeave which would work like
regular Enter/Leave but on the next (on z-axis) shape.
Please let me know what you think.
Peter
_______________________________________________
Moose-dev mailing list
Moose-dev(a)iam.unibe.ch
https://www.iam.unibe.ch/mailman/listinfo/moose-dev
--
_,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:
Alexandre Bergel http://www.bergel.eu
^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.
5:58 p.m.
Hi Alex,
I tried the example but it throws "Block cannot return" error when trying
to drag the blue circle... somewhere around
RTDragAndDroppable>>prepareElementForDND: anElement and [^self] so I wasn't
able to try it. Also the error looks really wonky. I tried it in the latest
Pharo4.0 image.
Also I am confused about the RTDragAndDroppable>>host: functionality. I do
not know beforehand what element will be dropped or where (as it is used in
the example). Usually I would have many containers and elements and they
should themselves decide whether they accept a particular item or not. But
I do agree that this is more complex issue. Should I work on it and give
you a better proposal in couple of days?
Peter
On Mon, Oct 13, 2014 at 4:22 PM, Alexandre Bergel <alexandre.bergel(a)me.com>
wrote:
Hi Peter and Gustavo!
Having a nice support for drag and drop is difficult. The idea is to go
step by step. I have introduced a new interaction, called
RTDragAndDroppable. You simply need to specify the host element, and the
action you want to perform when you drag and drop.
You can run the following example after updating Roassal.
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
v := RTView new.
e1 := (RTBox new size: 10; color: Color gray) element.
e2 := (RTEllipse new size: 30; color: Color blue) element.
e1 @ RTDraggable.
e1 translateTo: 50 @ 50.
v add: e1.
v add: e2.
e2 @ (RTDragAndDroppable new
host: e1;
do: [ :fromElement :toElement |
| newElement alreadyNested |
newElement := (RTBox new size: 20) element.
v add: newElement.
alreadyNested := toElement nestedElements.
toElement unbindNestedElements.
RTNest new
layout: RTGridLayout new;
on: toElement nest: alreadyNested,
(Array with: newElement) ]).
v
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
I will work today a bit more on hilighting the receiving element. This is
easy to do.
Cheers,
Alexandre
On Oct 12, 2014, at 8:02 PM, Peter Uhnák <i.uhnak(a)gmail.com> wrote:
Hi,
Currently I don't see any way how to tell an element that another one
has been
dropped onto him. For example if I want to drag an element into a
container (see example at the end).
Unfortunately in my solution i had to change the behaviour of Trachel
(RTMorph),
so could this be in some (better) way incorporated into Roassal
(Trachel)?
My solution is making a subclass
-------------------------------------
TRAbstractMouseEvent subclass: #TRMouseDragDrop
-------------------------------------
And altering mouseDragEnd
-------------------------------------
RTMorph>>rtMouseDragEnd: evt
| ee dropEvent dropShape relativePosition |
"notify the dragged element"
ee := TRMouseDragEnd new.
ee shape: shapeBeingPointed.
ee canvas: trachelCanvas.
ee morph: self.
shapeBeingPointed announce: ee.
"notify the element onto which was the drag performed"
shapeBeingPointed = trachelCanvas
ifFalse: [
shapeBeingPointed element attributes
at: #rtDroppable
ifPresent: [
relativePosition := self
relativePositionFor: evt.
dropShape
:= self shapeWithAction:
TRMouseDragDrop forPositionInPixels: relativePosition.
dropShape =
shapeBeingPointed
ifFalse: [
dropEvent :=
TRMouseDragDrop
new
shape:
shapeBeingPointed;
canvas:
trachelCanvas;
morph:
self.
dropShape
announce: dropEvent ] ] ].
eventBeginingDragging := nil.
shapeBeingPointed := nil
-------------------------------------
Example (use case) is:
-------------------------------------
view := RTView new.
container := RTBox new size: 200; color: Color white; borderColor: Color
black;
element.
group := RTGroup new.
RTNest new on: container nest: group.
container trachelShape size: 200.
box := RTBox new size: 50; color: Color magenta; element.
box translateTo: 250 @ 0.
container @ RTDraggable.
container @ RTResizeable.
box @ RTDraggable.
box attributes at: #rtDroppable put: true.
container
when: TRMouseDragDrop
do: [ :event |
| el |
el := event shape element.
el attributes at: #container ifPresent: [
group remove: el.
].
group add: el.
el attributes at: #container put: group.
].
view canvas
when: TRMouseDragDrop
do: [ :event |
| el |
el := event shape element.
el attributes at: #container ifPresent: [ :parent |
parent remove: el.
el attributes removeKey: #container.
].
].
view
add: container;
add: box.
view open.
-------------------------------------
Also it would be nice to have an option to highlight the drop area.
There is
TRMouseEnter/TRMouseLeave but it fires only for the top level
shape, perhaps it should for all? Or less invasive to add
TRMouseDragEnter/TRMouseDragLeave which would work like regular Enter/Leave
but on the next (on z-axis) shape.
Please let me know what you think.
Peter
_______________________________________________
Moose-dev mailing list
Moose-dev(a)iam.unibe.ch
https://www.iam.unibe.ch/mailman/listinfo/moose-dev
--
_,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:
Alexandre Bergel http://www.bergel.eu
^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.
_______________________________________________
Moose-dev mailing list
Moose-dev(a)iam.unibe.ch
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14 Oct
14 Oct
4:48 a.m.
Sure! I will try to have a look at it tomorrow. But feel free to work on the drag and
drop. My proposal is just a starting point.
Contribution are welcome!
Alexandre
Le 13-10-2014 à 12:58, Peter Uhnák
<i.uhnak(a)gmail.com> a écrit :
Hi Alex,
I tried the example but it throws "Block cannot return" error when trying to
drag the blue circle... somewhere around RTDragAndDroppable>>prepareElementForDND:
anElement and [^self] so I wasn't able to try it. Also the error looks really wonky. I
tried it in the latest Pharo4.0 image.
Also I am confused about the RTDragAndDroppable>>host: functionality. I do not know
beforehand what element will be dropped or where (as it is used in the example). Usually I
would have many containers and elements and they should themselves decide whether they
accept a particular item or not. But I do agree that this is more complex issue. Should I
work on it and give you a better proposal in couple of days?
Peter
On Mon, Oct 13, 2014 at 4:22 PM, Alexandre Bergel
<alexandre.bergel(a)me.com> wrote:
Hi Peter and Gustavo!
Having a nice support for drag and drop is difficult. The idea is to go step by step. I
have introduced a new interaction, called RTDragAndDroppable. You simply need to specify
the host element, and the action you want to perform when you drag and drop.
You can run the following example after updating Roassal.
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
v := RTView new.
e1 := (RTBox new size: 10; color: Color gray) element.
e2 := (RTEllipse new size: 30; color: Color blue) element.
e1 @ RTDraggable.
e1 translateTo: 50 @ 50.
v add: e1.
v add: e2.
e2 @ (RTDragAndDroppable new
host: e1;
do: [ :fromElement :toElement |
| newElement alreadyNested |
newElement := (RTBox new size: 20) element.
v add: newElement.
alreadyNested := toElement nestedElements.
toElement unbindNestedElements.
RTNest new
layout: RTGridLayout new;
on: toElement nest: alreadyNested, (Array with:
newElement) ]).
v
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
I will work today a bit more on hilighting the receiving element. This is easy to do.
Cheers,
Alexandre
On Oct 12, 2014, at 8:02 PM, Peter Uhnák <i.uhnak(a)gmail.com> wrote:
_______________________________________________
Moose-dev mailing list
Moose-dev(a)iam.unibe.ch
https://www.iam.unibe.ch/mailman/listinfo/moose-dev Hi,
Currently I don't see any way how to tell an element that another one has been
dropped onto him. For example if I want to drag an element into a container (see example
at the end).
Unfortunately in my solution i had to change the behaviour of Trachel (RTMorph), so could
this be in some (better) way incorporated into Roassal (Trachel)?
My solution is making a subclass
-------------------------------------
TRAbstractMouseEvent subclass: #TRMouseDragDrop
-------------------------------------
And altering mouseDragEnd
-------------------------------------
RTMorph>>rtMouseDragEnd: evt
| ee dropEvent dropShape relativePosition |
"notify the dragged element"
ee := TRMouseDragEnd new.
ee shape: shapeBeingPointed.
ee canvas: trachelCanvas.
ee morph: self.
shapeBeingPointed announce: ee.
"notify the element onto which was the drag performed"
shapeBeingPointed = trachelCanvas
ifFalse: [
shapeBeingPointed element attributes
at: #rtDroppable
ifPresent: [
relativePosition := self relativePositionFor: evt.
dropShape := self shapeWithAction: TRMouseDragDrop
forPositionInPixels: relativePosition.
dropShape = shapeBeingPointed
ifFalse: [
dropEvent := TRMouseDragDrop new
shape: shapeBeingPointed;
canvas: trachelCanvas;
morph: self.
dropShape announce: dropEvent ] ]
].
eventBeginingDragging := nil.
shapeBeingPointed := nil
-------------------------------------
Example (use case) is:
-------------------------------------
view := RTView new.
container := RTBox new size: 200; color: Color white; borderColor: Color black; element.
group := RTGroup new.
RTNest new on: container nest: group.
container trachelShape size: 200.
box := RTBox new size: 50; color: Color magenta; element.
box translateTo: 250 @ 0.
container @ RTDraggable.
container @ RTResizeable.
box @ RTDraggable.
box attributes at: #rtDroppable put: true.
container
when: TRMouseDragDrop
do: [ :event |
| el |
el := event shape element.
el attributes at: #container ifPresent: [
group remove: el.
].
group add: el.
el attributes at: #container put: group.
].
view canvas
when: TRMouseDragDrop
do: [ :event |
| el |
el := event shape element.
el attributes at: #container ifPresent: [ :parent |
parent remove: el.
el attributes removeKey: #container.
].
].
view
add: container;
add: box.
view open.
-------------------------------------
Also it would be nice to have an option to highlight the drop area. There is
TRMouseEnter/TRMouseLeave but it fires only for the top level shape, perhaps it should for
all? Or less invasive to add TRMouseDragEnter/TRMouseDragLeave which would work like
regular Enter/Leave but on the next (on z-axis) shape.
Please let me know what you think.
Peter
_______________________________________________
Moose-dev mailing list
Moose-dev(a)iam.unibe.ch
https://www.iam.unibe.ch/mailman/listinfo/moose-dev
--
_,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:
Alexandre Bergel http://www.bergel.eu
^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.
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3492
days inactive
3494
days old
4 comments
3 participants
participants (3)
-
Alexandre Bergel -
Gustavo Santos -
Peter Uhnák