Hi,
as I mentioned in previous posts of mine, I would like to have a widget with a window to display images with image(). On top I would like to have markers.
I found two ways of doing this:
1) update the image using the setData method and two variables for x and y coordinates. This is ok, as long as you don't zoom or pan the image (discussed in a previous post).
2) delete all objects and recreate them. This does not have the pan/zoom problem, but is computationally more intensive.
Here are the results that I got by cycling 100 switching images:
Method 1) took 0.027 seconds
Method 2) the time increases linearly by 1.8 ms per cycle. It starts at 0.1 seconds and ends up at 0.3 after 100 iterations. This is adding also about 260 bytes of memory every round (26 kB after 100 iterations). Clearly evidence of some memory leakage somewhere...
Below I have attached the code to show this and my IDL version.
Is there a way in between these two methods that can get the job done?
Thanks,
Helder
function ww_mouse_motion_event, win, x, y, keymods
info = win.uvalue
MousePos = win->ConvertCoord(x, y, /device, /to_data)
widget_control, (*info).wBase, tlb_set_title=string(MousePos[0:1],format='("Pos=(",f0.2,", ",f0.2,")")')
return, 1
end
pro testFunctionGraphicsObjects_event, event
;help, event
widget_control, event.top, get_uvalue=info
case event.id of
(*info).wButtonNext:begin
(*info).counter = ~(*info).counter
(*info).iObj->refresh, /disable
if (*info).counter then begin
xArr = (*info).d2[0]*dindgen((*info).s2[0])/((*info).s2[0]-1d)
yArr = (*info).d2[1]*dindgen((*info).s2[1])/((*info).s2[1]-1d)
(*info).iObj->setData, (*info).img2, xArr, yArr
widget_control, (*info).wStatus, set_value=string([(*info).s2[0],(*info).s2[1],(*info).d2[0], (*info).d2[1]], format='(i4,"x",i4," pix, ",f0.2,"x",f0.2," mm")')
endif else begin
xArr = (*info).d1[0]*dindgen((*info).s1[0])/((*info).s1[0]-1d)
yArr = (*info).d1[1]*dindgen((*info).s1[1])/((*info).s1[1]-1d)
(*info).iObj->setData, (*info).img1, xArr, yArr
widget_control, (*info).wStatus, set_value=string([(*info).s1[0],(*info).s1[1],(*info).d1[0], (*info).d1[1]], format='(i4,"x",i4," pix, ",f0.2,"x",f0.2," mm")')
endelse
(*info).iObj->scale, /reset
(*info).iObj->rotate, /reset
(*info).iObj->translate, /reset
(*info).iObj->refresh
end
(*info).wButtonDeleteNext:begin
(*info).counter = ~(*info).counter
(*info).tdd->delete
(*info).tnd->delete
(*info).pdd->delete
(*info).pnd->delete
(*info).iObj->delete
obj_destroy, (*info).tdd
obj_destroy, (*info).tnd
obj_destroy, (*info).pdd
obj_destroy, (*info).pnd
obj_destroy, (*info).iObj
if (*info).counter then begin
d = (*info).d2
s = (*info).s2
img = (*info).img2
widget_control, (*info).wStatus, set_value=string([(*info).s2[0],(*info).s2[1],(*info).d2[0], (*info).d2[1]], format='(i4,"x",i4," pix, ",f0.2,"x",f0.2," mm")')
endif else begin
d = (*info).d1
s = (*info).s1
img = (*info).img1
widget_control, (*info).wStatus, set_value=string([(*info).s1[0],(*info).s1[1],(*info).d1[0], (*info).d1[1]], format='(i4,"x",i4," pix, ",f0.2,"x",f0.2," mm")')
endelse
(*info).iObj = image(img, current=(*info).oWin, image_dimensions=d, margin=0)
res = redrawObj((*info).iObj)
(*info).tdd = res.tdd
(*info).tnd = res.tnd
(*info).pdd = res.pdd
(*info).pnd = res.pnd
end
(*info).wButtonLoopNext:begin
event.id = (*info).wButtonNext
times = dblarr(101)
help,/mem, output=out
startPos = strpos(out, ':')+1
endPos = strpos(out, ',')
startHeap = long(strmid(out, startPos, endPos-startPos))
t0 = systime(1)
for i = 0, 100l do begin
testFunctionGraphicsObjects_event, event
t1 = systime(1)
times[i] = t1-t0
t0 = t1
endfor
help,/mem, output=out
startPos = strpos(out, ':')+1
endPos = strpos(out, ',')
endHeap = long(strmid(out, startPos, endPos-startPos))
p = plot(times,'2r', xTitle='run Nr.', yTitle='time (sec)', title='Redraw, heap used='+strtrim((endHeap-startHeap)/1024l,2)+' kB')
print, 'average = '+string(mean(times),format='(f0.3)')+' seconds'
end
(*info).wButtonLoopDeleteNext:begin
tic
event.id = (*info).wButtonDeleteNext
times = dblarr(101)
help,/mem, output=out
startPos = strpos(out, ':')+1
endPos = strpos(out, ',')
startHeap = long(strmid(out, startPos, endPos-startPos))
t0 = systime(1)
help,/mem
for i = 0, 100l do begin
testFunctionGraphicsObjects_event, event
t1 = systime(1)
times[i] = t1-t0
t0 = t1
endfor
help,/mem, output=out
startPos = strpos(out, ':')+1
endPos = strpos(out, ',')
endHeap = long(strmid(out, startPos, endPos-startPos))
p = plot(times,'2r', xTitle='run Nr.', yTitle='time (sec)', title='Delete and Draw, heap used='+strtrim((endHeap-startHeap)/1024l,2)+' kB')
fitRes = linfit(dindgen(101), times)
ot = text(0.25,0.75, string(fitRes,format='("time = ",f0.3," + ",f0.9," runNr")'), 'b', /norm, target=p)
op = plot(fitres[0]+fitres[1]*dindgen(101),'2b', overplot=p)
end
(*info).wBase:begin
widget_control, (*info).wDraw, xSize=event.y, ySize=event.y
end
else:print, 'dunno what to do with id ', event.id
endcase
end
function redrawObj, iObj
tdd = text(3.0,0.3,'data defined', 'r', /data, target=iObj)
tnd = text(0.5,0.5,'norm defined', 'b', /norm, target=iObj)
pdd = polygon([3.0,4.0,4.0,3.0],[7.0,7.0,8.0,8.0],'r2', /data, target=iObj, /fill_background, fill_color="red")
pnd = polygon([0.3,0.4,0.4,0.3],[0.3,0.3,0.4,0.4],'b2', /norm, target=iObj, /fill_background, fill_color="light steel blue")
return, {tdd:tdd, tnd:tnd, pdd:pdd, pnd:pnd}
end
pro testFunctionGraphicsObjects_cleanup, event
print, 'cleanup'
widget_control, event, get_uvalue=info
ptr_free, info
end
pro testFunctionGraphicsObjects
;read the images
fNames = filepath(['mineral.png','endocell.jpg'], SUBDIRECTORY=['examples','data'])
img1 = read_png(fNames[0])
read_jpeg, fNames[1], img2
;get image sizes
s1 = size(img1, /dimensions)
s2 = size(img2, /dimensions)
;establish image dimensions (real space) as pixel sizes
pxs1 = 30d/s1[0] ;the x axis is defined as 30 um long
pxs2 = 1d/s2[0] ;the x axis is defined as 1 um long
d1 = s1*pxs1
d2 = s2*pxs2
;create starting widgets
wBase = widget_base(/row, title='Pos=( 0, 0)', /tlb_size_events)
wDraw = widget_window(wBase, xsize=600, ysize=600, mouse_motion_handler='ww_mouse_motion_event')
wButtonCol = widget_base(wBase, /col)
wButtonNext = widget_button(wButtonCol, /dynamic_resize, value='next Image')
wButtonDeleteNext = widget_button(wButtonCol, /dynamic_resize, value='delete and next Image')
wButtonLoopNext = widget_button(wButtonCol, /dynamic_resize, value='loop next Image')
wButtonLoopDeleteNext = widget_button(wButtonCol, /dynamic_resize, value='loop delete and next Image')
wStatus = widget_label(wButtonCol, /dynamic_resize, value=string([s1[0],s1[1],d1[0],d1[1]], format='(i4,"x",i4," pix, ",f0.2,"x",f0.2," mm")'))
widget_control, wBase, /realize
; Retrieve the newly-created Window object.
widget_control, wDraw, get_value=oWin
iObj = image(img1, current=oWin, image_dimensions=d1, margin=0)
res = redrawObj(iObj)
info = ptr_new({wBase:wBase,$
wDraw:wDraw,$
wButtonNext:wButtonNext,$
wButtonDeleteNext:wButtonDeleteNext,$
wButtonLoopNext:wButtonLoopNext,$
wButtonLoopDeleteNext:wButtonLoopDeleteNext,$
wStatus:wStatus,$
d1:d1,$
d2:d2,$
s1:s1,$
s2:s2,$
counter:0b,$
img1:img1,$
img2:img2,$
oWin:oWin,$
iObj:iObj,$
tdd:res.tdd,$
tnd:res.tnd,$
pdd:res.pdd,$
pnd:res.pnd})
oWin.uvalue=info
widget_control, wBase, set_uvalue=info
xmanager, 'testFunctionGraphicsObjects', wBase, cleanup = 'testFunctionGraphicsObjects_Cleanup', event_handler = 'testFunctionGraphicsObjects_event', /no_block
end
IDL> !version
{
"ARCH": "x86_64",
"OS": "Win32",
"OS_FAMILY": "Windows",
"OS_NAME": "Microsoft Windows",
"RELEASE": "8.4.1",
"BUILD_DATE": "Feb 17 2015",
"MEMORY_BITS": 64,
"FILE_OFFSET_BITS": 64
}
|
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