Quick Graphic Question
in [Visual Basic]
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From: Webbiz on 13 Mar 2010 01:07 On Fri, 12 Mar 2010 23:49:32 -0000, "Mike Williams" <Mike(a)WhiskyAndCoke.com> wrote: > >"Webbiz" <nospam(a)noway.com> wrote in message >news:qg5lp5d379m0majrv6eb4n0a3gko7vfq0e(a)4ax.com... > >> I did the test at 126 dpi with and without the check >> in the box. The drawings and graphics appear to be >> operating fine. They just got bigger. > >Yep. That's what's supposed to happen, and it's more or less automatic on >small VB Forms without needing any repositioning code because in many >respects VB is already dpi aware. The problems arise when you have a larger >fixed size Form that cannot expand its client area to its full 120 dpi size >on a 120 dpi machine because of a lack of screen real estate even though its >contained controls will still fully expand their size and position (and also >with user sizeable Forms of course) and when you are not positioning the >various elements on your Form in code in accordance with the current size of >its client area and the current size of the various elements. You are >obviously already doing that, at least in the important areas, which is why >your own Form is apparently okay at the various settings. It's always worth >checking though and you'll be surprised at how many apps go wrong at 120 dpi >or higher. > >> I'm puzzled as to what I could possibly do in my code >> to make things not relative to each other when resizing >> the DPI. > >It's not what you can do, but rather what you might fail to do. In your case >you are obviously already doing the required things. There are still the >Vista and Windows 7 special dpi scaling problems to account for though, >which can cause problems with your Form display even when you are already >doing all the right things in your code (the problems I mentioned that can >occur when the user's machine is set to 120 dpi with no tick in the box >against "Use Windows XP Style DPI Scaling". Those problems are due to the >new Vista special scaling not actually working properly for certain things. >I'm not sure whether they have fixed those problems in Windows 7 because I >don't have a copy, but they are a problem in Vista and if they have not been >fixed then they will be a problem in Windows 7 as well. In your own case it >would appear that you are not using anything on your Form in a way that will >show those problems (or that they have been fixed in Windows 7). > >A few different things are affected by the problem but I'll give you one >specific example and you can try it out yourself. Suppose your development >machine is running at the standard 96 dpi and you have a standard ListBox or >a ComboBox on your Form which is using the standard MS Sans Serif font and >in which you are displaying lots of items for the user to select from and >suppose that you have set its size at design time so that it neatly displays >all items without any of them being "cut off" at the right side, and with >perhaps even a little bit of extra space "for comfort". If you run such a >compiled exe on a machine running at the same 96 dpi settings then it will >obviously work okay. If you then run it on a 120 dpi XP machine (or a 120 >dpi Vista machine where there /is/ a tick in the "Use Windows XP Style DPI >Scaling" box) then it will still look okay, because the ListBox or ComboBox >will expand to 1.25 times its original design time pixel size and the size >of the font will expand by the same amount (or at least by a similar amount) >and everything will still probably fit as before, with the items in the >Combo still all being fully visible and not cut off at the right edge. The >whole ComboBox and its contents will effectively be a larger copy of the >original. However, if you run that compiled exe on a Vista 120 dpi machine >where there is /no tick/ in the "Use Windows XP Style DPI Scaling" box then >the ComboBox will still expand by the same amount as it did on the other 120 >dpi machine, but the font will expand by a much larger amount, looking >obviously too big and usually resulting in many of the items being "cut off" >at the right side. Similar things happen in some other controls, often >resulting in text overflowing the width of a Label Control and in text in >some other controls wrapping when it did not wrap before. This is not a >problem if you instead use True Type fonts by the way, but then the special >Vista scaling method makes the text look quite blurred and your customers >will think they suddenly need glasses! As I mentioned earlier, there is a >very easy way to fix those problems and that is to use a manifest in which >you declare your app to be "dpi aware", which will prevent Vista from using >its "special scaling" system and your app will then work just as well as it >did on XP at 120 dpi. > >As I've mentioned, these are definitelty problems in Vista and I suspect >they may also be problems in Windows 7 if MS hasn't got around to fixing >them. It might be worth trying that little test on your own Window7 and >Vista systems just to convince yourself that in such cases (in fact in all >cases) it really is worth embedding a suitable manifest into your app. > >Mike > > > The simple solution is to pack Vista on the shelf along with the 286 computer, Microsoft Bob, Microsoft ME and the Mac Cube. <g> Webbiz
From: Mike Williams on 13 Mar 2010 02:12 "Webbiz" <nospam(a)noway.com> wrote in message news:eoamp59prkdpskgfrjp27mtkaj2f7fuegv(a)4ax.com... > The simple solution is to pack Vista on the shelf along > with the 286 computer, Microsoft Bob, Microsoft ME > and the Mac Cube. <g> Well, I'm not so sure about that. A 286 computer can sometimes be quite useful ;-) Mike
From: Webbiz on 13 Mar 2010 14:46
On Sat, 13 Mar 2010 07:12:16 -0000, "Mike Williams" <Mike(a)WhiskyAndCoke.com> wrote: >"Webbiz" <nospam(a)noway.com> wrote in message >news:eoamp59prkdpskgfrjp27mtkaj2f7fuegv(a)4ax.com... > >> The simple solution is to pack Vista on the shelf along >> with the 286 computer, Microsoft Bob, Microsoft ME >> and the Mac Cube. <g> > >Well, I'm not so sure about that. A 286 computer can sometimes be quite >useful ;-) > >Mike > Sure, if you need just a few more inches to reach a top shelf. <g> Webbiz |