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n4gix

How To program XML to C Interfaces

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Hi all of you,basing on the work of Andreas Drawe I wrote a bit down to implement FS9-modules with "C:...:..." style interfaces to XML gauges just like e.g. C:fs9gps:.... or C:fsview:view.Arne Bartels

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Shucks, I got all excited because I misread your post...I thought you'd discovered a way to implement some "XML only" functions in C guages......such as loading the terrain map the XML GPS can display... ;(

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Don't you think this way round is not interesting enough <g>? And please have a bit of patience. The other way round is under development .Arne Bartels

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Hi Arne,Could this be a way to have variables for strings, the L-var:string doesn't work in xml as you know.Eugen

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Yes. E.g. C:xmlinterface:stringval of the example module is read/writeable.Arne Bartels

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Arne,Could you create "Str-Vars" in xml like you do with L-vars or do they need to be declarated in the c-module ?Eugen

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>Don't you think this way round is not interesting enough>? And please have a bit of patience. The other way>round is under development .Thanks, Arne... If I were into XML gauge coding, yes it would be "interesting enough..." ;)As I am hoping to include the "terrain map" in a GDI+ version of the Garmin G1000 (as well as the Avidyne Entegra Ike Slack is working on), that is of more immediate interest. ;)

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Unfortunetaely I didn't get it to work properly. Here is a bit of sample code. Usage: add ALL .cpp files, but ONLY CCustomDraw.rc as rc file to a new gauge project. "CCustomDraw!custom" is a C implementation of the GDI drawing in my above mentioned example, it works. No wonder, since I set up the methods "on the other side", so I exactly new which parmaters were needed."CCustomDraw!fs9view" implements the "C:fs9view:view" method. It does work in a way, but the position data relative to the FS window is needed. All I could get was the position relative to the panel bitmap, so there is usually an offset to the view (if the panel bitmap isn't upper left aligned). Note: it isn't GDI, it is a new view window at the gauges place, therefore no combination with GDI is psossible."CCustomDraw!fs9gps" implements "C:fs9gps:Rose", it looks wierd, some parameters aren't fixed yet, but at least it shows up. I wanted to implement C:fs9gps:Map, but didn't succeed (IGaugeCDrawable::Draw alwasy returns FALSE, and nothing shows up). If anyone wants to play with it....Arne Bartels

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I declared them in C module, that was the point of the exercise.Arne Bartels

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>I wanted to implement C:fs9gps:Map, but didn't succeed>(IGaugeCDrawable::Draw alwasy returns FALSE, and nothing shows>up). If anyone wants to play with it....>Arne BartelsThanks, Arne. I'll take a close look at this and see if there's any hope for what we'd like to achieve, although it seems already that it will not be possible... ;(We may have to implement "Plan B" whereby we access and display external georeferenced bitmaps, such as is done by FSM Moving Map...

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Maybe not imporssible, but still something missing. I noticed that C:fs9gps:Map uses some more flags via IGaugeCDrawable::GetFlags(). The other have only TAKES_DC or nothing, but this one also uses NO_TRANSPARENCY and DOUBLE_BUFFER. Maybe the drawing element needs extra info or, I used wrong params in the() Draw call. I abandoned, because I don't really need it and I have other things to do, not that it is impossible!Arne Bartels

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>I abandoned, because I>don't really need it and I have other things to do, not that>it is impossible!Thanks, Arne. I appreciate immensely the information provided thus far. I'm certain that it will be useful either to me or others... ;)I fully understand the limitations of one's time, as I have already far more on my plate than I can easily handle myself. With no less than five projects being simultaneously developed by ESDG (and being involved in some capacity with four of 'em directly!), I have precious little time available myself! ;)Thanks again!

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...>As I am hoping to include the "terrain map" in a GDI+ version>of the Garmin G1000 (as well as the Avidyne Entegra Ike Slack>is working on), that is of more immediate interest. ;)>Hi to all of you,it is possible to get the fs9gps working in a C gauge. You'll have to provide your own IGaugeCDrawableCreateParameters and IGaugeCDrawableDrawParameters classes to provide the necessary parameters and link everything together as shown in Arne's examples.In the PANEL_SERVICE_PRE_DRAW event of the gauge callback I use something likeif (timer == 0){ SetupdrawSuccess = pIGCD->SetupDraw(dim_surf, hdc_surf, NULL); GetdrawSuccess = pIGCD->GetDraw(pIGCD_DrawParams);}timer ++;if (timer >= 18){ SET_OFF_SCREEN(pelement_surf); timer = 0;}I don't know if this is the best way but at least it works.I attached a gauge which will show the terrain map and also the AI traffic based on the TrafficInfo.dllhttp://forums.avsim.net/user_files/110228.zipAlexander Drawe

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>I don't know if this is the best way but at least it works.>I attached a gauge which will show the terrain map and also>the AI traffic based on the TrafficInfo.dll>>http://forums.avsim.net/user_files/110228.zip>>Alexander DraweOutstanding! Would it be possible for you to post the source code for that gauge so I can learn more from it? I'm afraid I'm a bit too "green" to manage on my own... ;)

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