Handling Drag-and-Drop From Outside Revolution
First of all, you should be able to drag raw text from another application to a Rev field automatically with no special setup or intervention whatsoever.
However, if you want to drag text files into a field and have the contents of the text file be put into the field, you can do this:
Now the script above makes a number of assumptions: (1) that if the user were dragging multiple files, that you only care about the first one, and (2) that the file being dropped is actually a text file.(script of field) on dragEnter set the acceptDrop to true pass dragEnter end dragEnter on dragDrop put the dragData["files"] into tFileList if tFileList <> "" then put url("file:" & (line 1 of tFileList)) into me else beep end if end dragDrop
Let's deal with these one at a time:
dragData["files"]contains a return-delimited list of full paths to files that are being dragged into Revolution. You could certainly do a repeat loop through the files to find what you want, or alert the user if there was more than one (
the number of lines of the dragData["files"] > 1), etc.
dragData["files"]on ".txt", as in:
put the dragData["files"] into tFiles filter tFiles with "*.txt"
Suppose you wanted to drag a graphic from disk into an image object. This is very similar to the text example above.
This assumes:on dragEnter set the acceptDrop to true pass dragEnter end dragEnter on dragDrop put the dragData["files"] into tFileList if tFileList <> "" then set the fileName of me to (line 1 of tFileList) else beep end if end dragDrop
* You might have an empty image (perhaps through
create image) or a pre-existing one. If you set the
lockLocationof the image to TRUE, the incoming image would be scaled up/down to fit the rect of the image object. If the
lockLocationof the image is FALSE, the image object would be scaled to fit the rect of the incoming image. I would recommend turning on the border and turning off the 3D if you want to have an image "drop region".
Now perhaps you don't want to have a pre-existing image object, but just want to import the image when it is dropped on "the card". You can do it this by having only a single object (it doesn't have to be an image) that is the size of the card and is transparent (like a button) that has this code:
Same basic assumptions apply as the earlier code, and of course you might want to size the image object and lock it first, like:on dragEnter set the acceptDrop to true pass dragEnter end dragEnter on dragDrop put the dragData["files"] into tFileList if tFileList <> "" then create image set the fileName of it to (line 1 of tFileList) else beep end if end dragDrop
You get the idea.create image set the rect of it to 200,200,400,400 set the lockLocation of it to true set the fileName of it to (line 1 of tFileList)
Now we get to the fun part - the way to determine if the file(s) being dropped are OK for the field/image/etc. Here's an example of how to bring in text files ONLY for a field, which BTW concatenates the text from all files dropped on the field (watch the line wraps):
You can extend this model for checking for images, etc.on dragEnter if hasTextFiles(the dragData["files"]) then set the acceptDrop to true focus me end if end dragEnter function hasTextFiles pFileList -- assumes all files are from the same folder, looks for -- any file that is a text file -- If found, sets a custom prop to be used during the drop -- looks for both file extension and type of file put the directory into tOldDir set the itemDel to "/" put "" into tTextFiles repeat for each line tFile in pFileList if tTextFiles = "" then put tFile into tDir delete item -1 of tDir if tDir = "" then put "/" into tDir -- happens at root set the directory to tDir put the detailed files into tFiles replace "," with "/" in tFiles end if put lineOffset(cr& urlEncode(item -1 of tFile)&"/",cr&tFiles) into tLine if tLine <> 0 then -- which should always be the case if the number of items of (line tLine of tFiles) = 10 then -- no type/creator put "" into tTypeCreator else put item -1 of line tLine of tFiles into tTypeCreator end if if (char -4 to -1 of tTypeCreator = "TEXT") or \ (char -4 to -1 of tFile = ".txt") then put tFile & \ cr after tTextFiles end if end repeat set the directory to tOldDir delete last char of tTextFiles set the uTextFiles of me to tTextFiles return (tTextFiles <> "") end hasTextFiles on dragDrop put the uTextFiles of me into tFiles repeat for each line tFile in tFiles put me & url ("file:" & tFile) & cr into me end repeat end dragDrop
Hope this helps,
Posted on 9/11/04 by Ken Ray to the Use Revolution list