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Drag and drop to desktop
Posted: Fri Mar 13, 2015 10:04 pm
by Cyberqat
Hi, I'm working on an IDE extension. One of the first things I need to be able to do is drag an icon from my new tool panel out to
the open space and create a stack when released.
This is the code I have so far. The problem is that, when I release the drag, it pops the mouse back to the start position of
the drag and creates there rather then at the end position. I suspect that is because I am not dragging onto a destination object
since I am trying to make a new stack. How can I get the release point when its not over a LiveCode object?
Code: Select all
on mouseDown
set the dragData["text"] to empty
end mouseDown
on dragStart
set the dragImage to the id of the target
end dragStart
on dragEnd
CreateNewDBStack("New Databse Stack", "Default.sdb")
end dragEnd
command CreateNewDBStack pNewStackName, pDBname
#create stack
create stack pNewStackName
put it into tTheNewStack
set the loc of tTheNewStack to the mouseloc
set the DBPath of tTheNewStack to pDBName
#create DBscript on stack
local tScript
put "global gDBConnectionID"&cr into tScript
put "command onPreOpenStack"&cr after tScript
put " library stack ""e&"DatabaseLibrary.livecode""e&cr after tScript
put " put the DBPath of me into tDBPath"&cr after tScript
put " put databaseConnect(tDBPath) into gDBConnectionID" &cr after tScript
put "end onPreOpenStack" after tScript
set the script of tTheNewStack to tScript
end CreateNewDBStack
Re: Drag and drop to desktop
Posted: Sat Mar 14, 2015 1:29 am
by Klaus
Hi Cyberquat,
unfortunately we have no control nor do we know where the user may drop anything OUTSIDE of Livecode!
Hint: This
...
put "command onPreOpenStack"&cr after tScript
...
should read:
...
put "on PreOpenStack"& cr after tScript
...
Best
Klaus
Re: Drag and drop to desktop
Posted: Sat Mar 14, 2015 3:25 am
by Cyberqat
Thanks Klaus.
I guess the idea creates new stacks from the menu. So I need to do something similar.
Re: Drag and drop to desktop
Posted: Sat Mar 14, 2015 1:01 pm
by Klaus
Hi Cyberqat,
are you adventurous and don't mind using a quite complex and strange workaround?
I remember having solved a similar problem in a project a couple of years ago.
It was about dragging and dropping files from LC, but will surely work with a stack, too!
Sorry, I am about to leave for a gig with my rock band, so I will not have the time to search
for that stack on my hd and explain this before tomorrow. So stay tuned!
Best
Klaus
Re: Drag and drop to desktop
Posted: Sat Mar 14, 2015 3:30 pm
by FourthWorld
As Klaus noted, LC does not currently return the path of items dropped in the file manager of the host OS - I've submitted a request for that:
http://quality.runrev.com/show_bug.cgi?id=8634
However, some experimentation allowed me to discover that if you write a file to tmp and then set the dragData["file"] to that path with a dragAction of "move", on OS X at least this will work:
Code: Select all
on dragStart
set the dragaction to "move"
--
-- Create stack in temp:
put specialfolderpath("temporary") & "/sample.livecode" into tFile
put "DragThang"& the long seconds into tStackName
put the properties of the templateStack into tSaveTMPL
set the name of the templateStack to tStackName
lock messages
create invisible stack tStackName
reset the templateStack
--
-- Add payload object (put anything you want here):
copy me to stack tStackName
--
-- Save stack to temp:
set the filename of stack tStackName to tFile
close stack tStackName
set the visible of stack tStackName to true
set the destroyStack of stack tStackName to true
save stack tStackName
--
-- Let other programs know your drag action involves a file:
set the dragdata["files"] to tFile
end dragStart
I don't know if that will work on Windows, and unfortunately it doesn't work on Linux at this time because while the LiveCode Linux engine will read dragData["files"] for dropping into LiveCode objects a bug currently prevents us from setting it for external drops:
http://quality.runrev.com/show_bug.cgi?id=10334
Re: Drag and drop to desktop
Posted: Sat Mar 14, 2015 4:33 pm
by dunbarx
Hi.
Why do you need to drag something to the desktop to create a new stack? Why cannot you simply create a new stack? Surely the location on screen of that stack ought not to matter.
Craig Newman
Re: Drag and drop to desktop
Posted: Sun Mar 15, 2015 2:29 pm
by Klaus
FourthWorld wrote:However, some experimentation allowed me to discover that if you write a file to tmp and then set the dragData["file"] to that path with a dragAction of "move", on OS X at least this will work:...
That's exactly what I was going to write, and it also works on Windows!
Re: Drag and drop to desktop
Posted: Sun Mar 22, 2015 10:40 pm
by Cyberqat
Clever solution. Thanks guys!