[DayLateDon]

Hello ...


I want my NSTextView to have a transparent background. I've tried assigning a zero-percent-opacity color to the background in IB, and I've tried sending "setDrawsBackground:NO" to the view programmatically. No matter what I do, the text view's background displays window-striping, but the placement of the view makes the stripes out of phase with the window's own stripes, which is just ugly.

I note that in IB, the stripes are perfectly aligned and the background is wonderfully transparent. When the program runs, the stripes get mis-aligned. (Even when the stripes are aligned, I can still --but just barely-- perceive the view's rectangle.)

How do I get an honest-to-goodness *not-visible* background in a NSTextView?


Thanks and regards,

DayLate Don

[Rickster]

Hmm... perhaps you need to subclass NSTextView, NSScrollView, or NSClipView and override <font face = "courier">isOpaque</font> to return NO. Dunno if it'll work...

[nibs]

you need to setup the window and the views. something like this should do it:

<BLOCKQUOTE><font size="1"face="Geneva, Verdana, Arial">code:</font><HR><pre><font size=1 face=courier>
<font color = brown>//Set the background color to clear</font>
[[self window] setBackgroundColor: [NSColor clearColor]];

<font color = brown>//set the transparency close to one.</font>
[[self window] setAlphaValue: <font color = blue>0.9999</font>];

[[self window] setOpaque: NO];


[scrollView setDrawsBackground: NO];

[textView setDrawsBackground: NO];

</font>[/code]

[nibs]

&lt;error&gt;

[ 04-21-2002: Message edited by: nibs ]

[DayLateDon]

Hello ...

I found the trouble. I have to send "setDrawsBackground:NO" to the NSScrollView containing the NSTextView.

That is sending
<BLOCKQUOTE><font size="1"face="Geneva, Verdana, Arial">code:</font><HR><pre><font size=1 face=courier>
[[myTextView superview] superview] setDrawsBackground:NO];
</font>[/code]
does the trick. ( [myTextView superview] is the NSClipView; the second 'superview' gets me out to the NSScrollView level.)

It turns out that I have to send this to every scrolly object in my app (for instance a scrolling matrix of buttons). Hopefully Apple will provide a "Draws Background" checkbox to the NSScrollView info palette in Interface Builder. (And the same checkbox for NSTextView, which passes its value up to the scroll view.) The double-superview call raises (now numerous) Project Builder warnings that NSView doesn't understand "setDrawsBackground:".

Is there a way to tell Project Builder not to throw out that warning each time?


Thanks,

DayLateDon

[Ghoser777]

Originally posted by DayLateDon:
<STRONG>Is there a way to tell Project Builder not to throw out that warning each time?


Thanks,

DayLateDon</STRONG>

Cast it to the appropriate type as so:

<BLOCKQUOTE><font size="1"face="Geneva, Verdana, Arial">code:</font><HR><pre><font size=1 face=courier>
[(NSScrollView*)[myTextView superview] superview] setDrawsBackground:NO];
</font>[/code]

HTH,
F-bacher

[DayLateDon]

Hello ...


"Cast it to the appropriate type" ... Of course!

(slaps self on forehead)


Thanks ...

DayLateDon