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

[Stephen]

   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
>>>>> ------------------------------------------------------------------------------
>>>>>
>>>>> Slashdot TV.
>>>>> Video for Nerds.  Stuff that matters.
>>>>> http://tv.slashdot.org/
>>>>> _______________________________________________
>>>>> Gambas-user mailing list
>>>>> Gambas-user at lists.sourceforge.net
>>>>> 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