[Gambas-user] an "Is this possible question" about images
richard terry
rterry at ...1946...
Sat Apr 16 13:38:35 CEST 2011
On Saturday 16 April 2011 20:32:22 Shane Powell wrote:
Hi Shane,
I''ve re-arranged the screen from 0.0.3 to show you what happens when you
have a (roughly) proportional picture.
If you leave the drawing code as is in DrawingArea1_Draw() you'll see what I
mean about the area under the mouse cursor point not being translated into the
viewing window. I've set it back to the shoulder Xray which is tiny.
I wondered if there was a logical relationship then, between the mouse cursor
using this drawing method and what to show.
Regards
Richard
> On 16/04/11 15:27, richard terry wrote:
> > On Saturday 16 April 2011 10:29:15 Shane Powell wrote:
> >
> > Hi Shane,
> >
> > I had an 11MB picture I wanted to magnify (I'll send you an image of this
> > off list), with your last code iteration only part of the image was
> > shown, so I changed the code in the drawingarea1_draw, to make the whole
> > image show.
> >
> > However now, the mouse pointer dosn't show what's under it.
> >
> > ?? fixable??
> >
> > I'll send make the picture where the mouse was so that you can see what
> > the mouse was actually pointing at and what showed in the magnified area.
> >
> > Otherwise, the prototype looks good. We should buff it up and put it into
> > the gambas examples!
> >
> > Regards
> >
> > richard
> >
> >> On 16/04/11 08:53, richard terry wrote:
> >>> On Saturday 16 April 2011 00:23:47 Shane Powell wrote:
> >>>
> >>> Thanks heaps to shane, Caveat and all - I'll try a look at all this
> >>> today and report back.
> >>>
> >>> Regards
> >>>
> >>> Richard
> >>>
> >>>> On 15/04/11 22:58, richard terry wrote:
> >>>>> On Friday 15 April 2011 17:02:25 richard terry wrote:
> >>>>> Hi Kevin/List,
> >>>>>
> >>>>> I took at quick look at this, but my lame brain never functions with
> >>>>> basic mathematical problems, I enclose an embryonic code.
> >>>>>
> >>>>> This 'sort of' works, theres a drawing area into which I loaded the
> >>>>> image of a shoulder Xray and then another on top which will be the
> >>>>> magnifier. I put a couple of textboxes on it to change some of the
> >>>>> internal values, but can't seem to figure out the magnification
> >>>>> factors.
> >>>>>
> >>>>> If I click over this it does move around and magnify, albeit not
> >>>>> lined up properly and sometimes it seems to get lost. It would be
> >>>>> nice to have this be say a circle, with a border, and be accurate,
> >>>>> maybe someone can modfy the code to make it work.
> >>>>>
> >>>>> Any help appreciated.
> >>>>>
> >>>>>> On Friday 15 April 2011 16:15:13 Kevin Fishburne wrote:
> >>>>>> Thanks, and to Rolf-Werner Eilert's reply, I'll take a look at
> >>>>>> these suggestions when I go home.
> >>>>>>
> >>>>>> I need a little 'side project' to stave off the bordum of the
> >>>>>> hum-drum debugging of the main project.
> >>>>>>
> >>>>>> Will post back my sucess or lack therof
> >>>>>>
> >>>>>> Regards
> >>>>>>
> >>>>>> Richard
> >>>>>>
> >>>>>>> On 04/15/2011 12:47 AM, richard terry wrote:
> >>>>>>>>> Do you need it to look like a fisheye-style lens effect, or just
> >>>>>>>>> box-zoom an area? If the latter this can be done easily in gb
> >>>>>>>>> code.
> >>>>>>>>
> >>>>>>>> Just the box-zoom .
> >>>>>>>>
> >>>>>>>> Any change of you giving me a helping hand? I've not done anything
> >>>>>>>> much with images or drawing.
> >>>>>>>>
> >>>>>>>> I'll mail you a sample png if you want - the purpose here is to
> >>>>>>>> magnify areas of either skin, xray films or dermatascope images -
> >>>>>>>> all are images at the end of the day.
> >>>>>>>>
> >>>>>>>> Its for our open - source medical records project that Ian and I
> >>>>>>>> are chuggling slowly along with - not releasable as yet by I'm
> >>>>>>>> hoping that by the end of 2011 it will be pretty much beta.
> >>>>>>>
> >>>>>>> That is very cool. I'm doing a game so I know a little about images
> >>>>>>> in gb.
> >>>>>>>
> >>>>>>> I'm going to assume that you're using Qt or GTK and not SDL or
> >>>>>>> OpenGL, but correct me if I'm wrong. For those the easiest way to
> >>>>>>> do graphics is with a DrawingArea control. After creating it on the
> >>>>>>> form I'd change the Cached property to True so it will
> >>>>>>> automatically redraw itself if something moves over it.
> >>>>>>>
> >>>>>>> You create image variables and load image files into them like
> >>>>>>> this:
> >>>>>>>
> >>>>>>> Dim/Public someimage As Image
> >>>>>>> someimage = Image.Load("FleshEatingVirusNooooo.jpg")
> >>>>>>>
> >>>>>>> You write images to the DrawingArea control like this:
> >>>>>>>
> >>>>>>> Draw.Begin(DrawingArea1)
> >>>>>>> Draw.Image(someimage, X, Y, [Width, Height, SrcX, SrcY,
> >>>>>>> SrcWidth, SrcHeight])
> >>>>>>> ' Add more "Draw.Image" statements here to composite
> >>>>>>> additional images into the DrawingArea.
> >>>>>>> Draw.End ' Commits the composition to the DrawingArea so that it
> >>>>>>> may be seen. May need a "Wait" statement if done repeatedly.
> >>>>>>>
> >>>>>>> The [bracketed] parameters are optional. someimage is the source
> >>>>>>> and the DrawingArea is the target. You can specify a subset of the
> >>>>>>> source (the area to be zoomed) by playing with SrcX and SrcY
> >>>>>>> (upper-left corner of source to be drawn) and SrcWidth and
> >>>>>>> SrcHeight (width and height relative to SrcX and SrcY of source to
> >>>>>>> be drawn). You can scale the source by playing with Width and
> >>>>>>> Height.
> >>>>>>>
> >>>>>>> So that the source image writes to the DrawingArea don't leave a
> >>>>>>> trail, I'd first draw the main (unzoomed) image to the DrawingArea,
> >>>>>>> then draw the zoomed area onto that for each "frame" that you draw.
> >>>>>>> The logic would go something like:
> >>>>>>>
> >>>>>>> ' Create your image variables.
> >>>>>>> ' Load images into your image variables.
> >>>>>>> Draw.Begin(DrawingAreaControlName)
> >>>>>>> ' Draw the main image into the DrawingArea.
> >>>>>>> ' Draw part of the main image into the DrawingArea adjusted by
> >>>>>>> cursor position, zoom area size and zoom level.
> >>>>>>> ' Draw text or whatever else you need to into the DrawingArea.
> >>>>>>> Draw.End
> >>>>>>>
> >>>>>>> To draw text, which is really cool, you may do something like this
> >>>>>>> inside the Draw.Begin/End:
> >>>>>>>
> >>>>>>> Draw.Foreground = Color.Black
> >>>>>>> Draw.Text("Look, it's text on an image with a crappy shadow!!!", X,
> >>>>>>> Y) Draw.Foreground = Color.White
> >>>>>>> Draw.Text("Look, it's text on an image with a crappy shadow!!!", X
> >>>>>>> + 1, Y - 1)
> >>>>>>>
> >>>>>>> I don't have any project examples that are simple enough to
> >>>>>>> demonstrate this, but if you're really having trouble I could put
> >>>>>>> something together.
> >>>>>>
> >>>>>> --------------------------------------------------------------------
> >>>>>>-- -- --- --- Benefiting from Server Virtualization: Beyond Initial
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> >>>>>> simplify management, and improve application availability and
> >>>>>> disaster protection. Learn more about boosting the value of server
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> >>>>>> _______________________________________________
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> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>> --------------------------------------------------------------------
> >>>>>>-- -- ------ Benefiting from Server Virtualization: Beyond Initial
> >>>>>> Workload Consolidation -- Increasing the use of server
> >>>>>> virtualization is a top priority.Virtualization can reduce costs,
> >>>>>> simplify management, and improve application availability and
> >>>>>> disaster protection. Learn more about boosting the value of server
> >>>>>> virtualization.
> >>>>>> http://p.sf.net/sfu/vmware-sfdev2dev
> >>>>>>
> >>>>>>
> >>>>>> _______________________________________________
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> >>>>
> >>>> this is how i would do it when the mouse cursor get to the right or
> >>>> the bottom of the image it starts to strech but you could just limit
> >>>> the mouse travel and the rest you could make how you wanted easy i
> >>>> think hope it helps
> >>>
> >>> -----------------------------------------------------------------------
> >>>-- ----- Benefiting from Server Virtualization: Beyond Initial Workload
> >>> Consolidation -- Increasing the use of server virtualization is a top
> >>> priority.Virtualization can reduce costs, simplify management, and
> >>> improve application availability and disaster protection. Learn more
> >>> about boosting the value of server virtualization.
> >>> http://p.sf.net/sfu/vmware-sfdev2dev
> >>> _______________________________________________
> >>> Gambas-user mailing list
> >>> Gambas-user at lists.sourceforge.net
> >>> https://lists.sourceforge.net/lists/listinfo/gambas-user
> >>
> >> just some more tinkering
> >>
> >>
> >>
> >> ------------------------------------------------------------------------
> >>------ Benefiting from Server Virtualization: Beyond Initial Workload
> >> Consolidation -- Increasing the use of server virtualization is a top
> >> priority.Virtualization can reduce costs, simplify management, and
> >> improve application availability and disaster protection. Learn more
> >> about boosting the value of server virtualization.
> >> http://p.sf.net/sfu/vmware-sfdev2dev
> >>
> >>
> >> _______________________________________________
> >> Gambas-user mailing list
> >> Gambas-user at lists.sourceforge.net
> >> https://lists.sourceforge.net/lists/listinfo/gambas-user
>
> hi richard try this
>
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