[squeak-dev] The Inbox: Morphic-ct.1715.mcz

Thiede, Christoph Christoph.Thiede at student.hpi.uni-potsdam.de
Fri Nov 20 12:15:21 UTC 2020

Hi Marcel,

do you really think that it would be a good idea to couple HandMorph directly to MorphicProject? I always thought the world should be the only object to communicate with the world - except for accessing a small set of global interfaces such as #world, #addDeferredUIMessage: and #uiManager. :-)


Von: Squeak-dev <squeak-dev-bounces at lists.squeakfoundation.org> im Auftrag von Taeumel, Marcel
Gesendet: Mittwoch, 18. November 2020 09:48:41
An: squeak-dev
Betreff: Re: [squeak-dev] The Inbox: Morphic-ct.1715.mcz

Hi Christoph.

> Re-enables handling of #launchDrop events ...

It still looks like a proposal of having PasteUpMorph >> #launchSystemEventFiles:event: to me. :-) I would rather like to see such a send happen to the current project, not the world.


Am 17.11.2020 20:26:13 schrieb commits at source.squeak.org <commits at source.squeak.org>:

Christoph Thiede uploaded a new version of Morphic to project The Inbox:

==================== Summary ====================

Name: Morphic-ct.1715
Author: ct
Time: 17 November 2020, 8:25:42.546431 pm
UUID: 4a1a9a9f-9ae1-0640-9f18-17e3c956fa0c
Ancestors: Morphic-mt.1713

Re-enables handling of #launchDrop events when the VM is configured as a singleton and has been invoked again, though currently only handled with a rudimentary fallback implementation.

See http://forum.world.st/Changeset-Enhanced-integration-of-drag-n-drop-from-host-tp5123857p5124332.html. Thanks to Jakob (jr) for the feedback!

=============== Diff against Morphic-mt.1713 ===============

Item was changed:
----- Method: HandMorph>>generateDropFilesEvent: (in category 'private events') -----
generateDropFilesEvent: evtBuf
"Generate the appropriate mouse event for the given raw event buffer."

| position buttons modifiers stamp numFiles dragType |
stamp := evtBuf second.
stamp = 0 ifTrue: [stamp := Time eventMillisecondClock].
dragType := evtBuf third.
position := evtBuf fourth @ evtBuf fifth.
buttons := MouseEvent redButton. "hacked because necessary for correct mouseMoveDragging handling"
modifiers := evtBuf sixth.
buttons := buttons bitOr: (modifiers bitShift: 3).
numFiles := evtBuf seventh.

dragType caseOf: {
[1] -> [ "dragEnter"
externalDropMorph := TransferMorph new
dragTransferType: #filesAndDirectories;
source: self;
passenger: (numFiles = 0 "Usually, numFiles and drop paths are delivered on dragDrop only. Still reserving this possibility for able host implementations."
ifTrue: [self flag: #vmCapabilityMissing. 'Unknown host content' translated]
ifFalse: [self collectDropFilesAndDirectories: numFiles]);

"During the drag operation, the host system is responsible for displaying the cursor."
self grabMorph: externalDropMorph.
self showTemporaryCursor: Cursor blank.
externalDropMorph bottomRight: self topLeft. "Southeast area of the cursor is blocked by drawings from the source application. Display our drop morph at the opposite corner of the cursor." ].
[2] -> [ "dragMove"
^ MouseMoveEvent new
setType: #mouseMove
startPoint: self position
endPoint: position
trail: "{self position. position}"(self mouseDragTrailFrom: evtBuf)
buttons: buttons
hand: self
stamp: stamp ].
[3] -> [ "dragLeave"
externalDropMorph ifNotNil: #abandon.
externalDropMorph := nil.
self showTemporaryCursor: nil ].
[4] -> [ "dragDrop"
+ | oldButtons event |
+ oldButtons := lastEventBuffer fifth
+ bitOr: (lastEventBuffer sixth bitShift: 3).
+ event := MouseButtonEvent new
+ setType: #mouseUp
+ position: position
+ which: (oldButtons bitXor: buttons)
+ buttons: buttons
+ nClicks: 0
+ hand: self
+ stamp: stamp.
- | oldButtons |
externalDropMorph ifNil: [
+ "dragDrop has been sent without prior dragging. This happens when the VM is configured as singleton application and has been invoked again with a new image file (aka #launchDrop, runAsSingleInstance on Unix, or RunSingleApp on Windows)."
+ self flag: #forLater. "ct: When we decouple event generation from Morphic, we will probably need to introduce a separate SystemLaunchEvent class for this event. See http://forum.world.st/Changeset-Enhanced-integration-of-drag-n-drop-from-host-tp5123857p5124332.html."
+ self world
+ launchSystemFiles: (self collectDropFilesAndDirectories: numFiles)
+ event: event.
+ ^ nil].
- "dragDrop has been sent without prior dragging. This happens when the VM is configured as singleton application and has been called again (aka #launchDrop)."
- ^ self error: 'Launch drop for singleton Squeak not yet implemented.'].

self showTemporaryCursor: nil.
externalDropMorph passenger isString ifTrue: [
self flag: #vmCapabilityMissing. "See above."
externalDropMorph passenger: (self collectDropFilesAndDirectories: numFiles)].
externalDropMorph := nil.

(Smalltalk classNamed: #DropFilesEvent) ifNotNil: [:eventClass |
| classicEvent |
"Generate classic DropFilesEvent, providing backward compatibility."
classicEvent := eventClass new
setPosition: position
contents: numFiles
hand: self.
self processEvent: classicEvent.
classicEvent wasHandled ifTrue: [^ nil]].

+ ^ event ].
- oldButtons := lastEventBuffer fifth
- bitOr: (lastEventBuffer sixth bitShift: 3).
- ^ MouseButtonEvent new
- setType: #mouseUp
- position: position
- which: (oldButtons bitXor: buttons)
- buttons: buttons
- nClicks: 0
- hand: self
- stamp: stamp ].
[5] -> [ "drag request"
"For dnd out. Not properly implemented at the moment."
self shouldBeImplemented] }.
^ nil!

Item was added:
+ ----- Method: PasteUpMorph>>launchSystemFiles:event: (in category 'event handling') -----
+ launchSystemFiles: fileStreams event: anEvent
+ "Handle a number of files the singleton VM was invoked with again."
+ self flag: #todo. "Do something more useful with the image here, e. g. tell the VM to load it."
+ ^ self dropFiles: fileStreams event: anEvent!

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