[Gambas-user] Drawing Areas, painting on them, and printing the results...

[Jussi Lahtinen]

Everything works now?


Jussi


On Wed, Sep 3, 2014 at 6:28 PM, Stephen <sbungay at ...3301...> wrote:

>    Uh huh. It figures, almost four hours after the initial post,
> frustration levels climbing, I sent that email then the solution hits me
> square between the eyes.
>
> Yes use cached mode.
>
> On 09/03/2014 11:18 AM, Stephen wrote:
> > Paint.Begin and use cached mode? Trying that now.
> >
> > On 09/03/2014 11:14 AM, Stephen wrote:
> >>      Typographical error in the code (not that it is causing a problem).
> >> This line
> >>
> >>      mDrawingAreaMatrix[X] = NEW DrawingArea(Panel1) AS "Card"&
>  CInt(X)
> >>
> >> CInt(X) is redundant and not at all what I was thinking about when I
> >> typed that line. It should more properly read;
> >>
> >>      mDrawingAreaMatrix[X] = NEW DrawingArea(Panel1) AS "Card"&
>  CStr(X)
> >>
> >>      I'm beginning to think that what I am trying to accomplish is not
> >> possible. How can a Draw event that is not in the compile-time source be
> >> accessed during run-time?
> >>
> >> On 09/03/2014 06:39 AM, Stephen wrote:
> >>>     Attached is a sample project that dynamically instantiates 10
> >>> business card sized DrawingAreas within a Panel on a forum. The form
> >>> represents a North American letter-sized sheet of paper. Since the
> >>> Draw event must be used to draw within each of the Drawing areas, and
> >>> the the Drawing Areas are brought into existence at run-time, the
> >>> question is how to draw something on them?
> >>>
> >>>     The actual project uses a database to dynamically create (or
> >>> re-create) QR or Barcode images.
> >>>
> >>> Steve.
> >>>
> >>> On 09/02/2014 07:05 PM, Stephen wrote:
> >>>> On 09/02/2014 06:22 PM, Jussi Lahtinen wrote:
> >>>>>> I guess it is the need to use the draw event in order to do anything
> >>>>>> with the drawing area that had me spun. I think in terms of methods,
> >>>>>> properties and events, but I do not think in terms of events being
> the
> >>>>>> very thing that actually does the work.
> >>>>>>
> >>>>> Draw event is called every time drawingarea needs to be drawn.
> >>>>        Yes, so we force the event by the refresh method. I'm slowly
> making
> >>>> progress... documenting things as I go. Thank you taking the time to
> >>>> help.
> >>>>
> >>>>> Thus it is
> >>>>> where you put the drawing commands.
> >>>>>
> >>>>> But you can change this behavior by setting Cached property to True.
> >>>>> Then you start painting by determining painting device (Gambas
> >>>>> cannot know
> >>>>> where to draw, if you are not in specific drawing event)
> >>>>> Paint.Begin(hNameOfPaintingDevice) and end with Paint.End.
> >>>>> See the documentation.
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>> I'm thinking of it now in terms of Macros, using the Object.Call(me,
> >>>>>> $sFunctionName) treats the code in $sFunctionName like a Macro, (am
> >>>>>> I on
> >>>>>> the right track?) Flexible&     powerful yes. Intuitive in it's
> >>>>>> usage, not
> >>>>>> so much.
> >>>>>>
> >>>>> This only enables you to use string value to call a function. There
> are
> >>>>> many alternatives for this.
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>> One of the things that really confused me was the paint.reset
> command
> >>>>>> telling me it had no device.... ummm... no "device"? To me a device
> >>>>>> is a
> >>>>>> piece of hardware, a printer, a modem, a screen, keyboard, mouse,
> >>>>>> soundcard, NIC, Com port etc.
> >>>>> In Unix/Linux device has bit broader meaning, see example /dev/null
> or
> >>>>> /dev/random. Not all devices are physical devices.
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>> BTW, how does reset differ from clear?
> >>>>>>
> >>>>> http://gambaswiki.org/wiki/comp/gb.qt4/drawingarea/clear
> >>>>> http://gambaswiki.org/wiki/comp/gb.qt4/paint/reset
> >>>>>
> >>>>>
> >>>>>
> >>>>> Jussi
> >>>>>
> ------------------------------------------------------------------------------
> >>>>>
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> >>>>> _______________________________________________
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> >>>>> https://lists.sourceforge.net/lists/listinfo/gambas-user
> >>>>>
> >>>
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> >>>
> >>>
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> >
>
>
> --
> Kindest Regards
> Stephen A. Bungay, Prop.
> Smarts On Site Information Systems
>
>
>
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