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text selection From: James Newton <jnewton@cqm.co.uk> Subject: Re: select line text listing To: DIRECT-L@LISTSERV.UARK.EDU Nick Derewianka <nickd@e-media.com.au> > I have to create a selectable text listing (think of the winamp > playlist) > I need to be able to select a line of text. > I would have liked to have used a text member... > Can someone please point out to me the obvious solution that i have > missed so that im not really going to have to roll my own widget... Hi Nick, There is no obvious solution... at least none that I have found. But you might not need to roll your own widget. I can send you (and anyone else who is interested) a 24 K movie with a couple of behaviors, one to attach to the non-editable text sprite and the other to attach to one or two rectangular shape sprites to create the hilite. I tend to set the ink of the lower-numbered shape sprite to Reverse, and the the ink of the higher-numbered shape sprite to Lightest. This allows me to create a colored hilite with an inversion effect. If you want to create your own behavior, the three main handlers appear below. (Note that this extract does not set the properties). Cheers, James ------------------------------------------------------------------------ -- BEHAVIOR FOR TEXT MEMBER property mySprite -- sprite property myRect -- rect of mySprite property myMember -- member of mySprite property myText -- text of myMember property myHiliteInstances -- list of instances of Behavior for Shapes property myHiliteLine -- currently hilited line of text -- <handlers to set properties snipped> on exitFrame(me) ----------------------------------------------------- -- * Checks if the mouse is now over a new line, and if so, calls -- the instances of "Hilite Rect" behavior stored in -- myHiliteInstances with the rect of the new line as a parameter. -------------------------------------------------------------------- mouseOverLine = pointToLine(mySprite, the mouseLoc) if myHiliteLine = mouseOverLine then -- There is no need to refresh the hilite rect exit end if myHiliteLine = mouseOverLine call(#hiliteRect, myHiliteInstances, me.getLineRect(myHiliteLine)) end hiliteLineUnderMouse on getLineRect(me, whichLine) ---------------------------------------- -- Called by exitFrame() -- -- Returns the rect of the line/paragraph of text identified by -- whichLine. -------------------------------------------------------------------- currentScroll = myMember.scrollTop if whichLine < 1 then -- The mouse is not over the sprite: return a rect with zero area return rect (0, 0, 0, 0) else if whichLine = 1 then -- The current line starts at the top of the sprite top = myRect.top else -- Determine where the current line starts previousChars = myText.line[1..whichLine - 1].char.count top = myMember.charPosToLoc(previousChars)[2] top = top + myRect.top - currentScroll + 1 -- Trim to the top of the sprite top = max(top, myRect.top) end if -- Determine where the current line ends lastChar = myText.line[1..whichLine].char.count bottom = myMember.charPosToLoc(lastChar)[2] bottom = bottom + myRect.top - currentScroll + 1 -- Trim to the bottom of the sprite bottom = min(bottom, myRect.bottom) return rect(myRect.left, top, myRect.right, bottom) end getLineRect -- BEHAVIOR FOR SHAPE SPRITES on hiliteRect(me, theRect) ------------------------------------------- -- Called by the exitFrame() handler of the "Text Hilite" -- behavior on a separate sprite. -------------------------------------------------------------------- sprite(me.spriteNum).rect = theRect end hiliteLine