Hi,
Thanks for all your brill suggestions. I've spent all day putting them to
good use in every possible combination and can now safely say that... the
problem persists :o'(. The JFrame still needs to be maximised before the
stretched image is displayed.
Find pasted below the full source (imagereplace2.py) for your amusement.
Replace "pinnaimage" with any old image before testing...
A quick program recap for those who can't/won't:
-----oooo-----
1. Load in an image.
2. Extract its domain set
3. Set up Twist_Grid 1: the image's first 'twisted' domain set
4. Set up Twist_Grid 2: the image's 2nd 'twisted' domain set
5. Def(ine) twist1() function for stretching the image by x2
6. Def(ine) twist2() function for stretching the image by x3
7. Map original image to a Display
8. Add Display and some JButtons to a ContentPane via JPanels
9. Add Pane to a JFrame.
10. On clicking "x2" button:
Call twist1() to display the stretched image by mapping the first twisted
domain set to a new display
11.On "x3" button click:
Call twist2() to display the next stretched image by mapping the 2nd
domain set to a the same display used for #10
-----oooo-----
Your previous suggestions have helped speed up things a *tiny* bit
(twist_grid is no longer computed within twist1() i.e a FlatField containing
twist_grid is set up at program start up) but it's still baulking at
updating the display properly.
The Jython version of points 10&11 pasted below:
---start---
#define twist events for stretching image in y direction
def twist1(event):
dispt = subs.makeDisplay(twist_maps)
dispt.addData("twisted",twist)
dispt.setBoxSize(.5)
displayPanelOne = JPanel(border=border.TitledBorder("Display Panel"),
layout=GridLayout(1,2,5,5))
displayPanelOne.add(dispt.getComponent())
displayPanelOne.add(plotd.getComponent())
pane.add("Center", displayPanelOne) #will not display otherwise
#twist event 2
def twist2(event):
dispt = subs.makeDisplay(twist_maps2)
if ref is None:
ref=dispt.addData("twisted2", twist2)
else:
ref=dispt.setData(twist2)
dispt.setBoxSize(.5)
displayPanelTwo = JPanel(border=border.TitledBorder("Display Panel"),
layout=GridLayout(1,2,5,5))
displayPanelTwo.add(dispt.getComponent())
displayPanelTwo.add(plotd.getComponent())
pane.add("Center", displayPanelTwo) #will not display otherwise
---end---
Still hacking away at it. Any suggestions welcome. On running the program
you'll notice that twist2() does not appear to be generating a new
twist_grid (original image is still displayed) despite the fact that it is a
duplicate of twist1() albeit with a slightly modified sampling domain. I
suspect it doesn't like having to addData to the same Display (dispt).
Should get an UnboundLocal Error about "ref".
Thanks for reading.
Chi-chi
------- imagereplace2.py begin: ---------------
from visad import *
from visad.python.JPythonMethods import *
import graph, subs
import time
from java.lang import Boolean, System
from javax.swing import JPanel, JFrame, JButton, BorderFactory, border
from java.awt import BorderLayout, GridLayout, FlowLayout, Font
img=load("pinnaimage.jpg")
set = img.getDomainSet()
lengths = set.getLengths()
width = lengths[0]
height = lengths[1]
#define twist grids for stretching image in pre-defined amounts (y direction
only)
#Twist_Grid 1
twist_grid = [ [w for h in xrange(height) for w in xrange(width)],
[(w-(h*0.5)) for h in xrange(height) for w in xrange(width)]]
twist_set = Gridded2DSet(set.getType(), twist_grid, width, height, None,
None, None, 0)
twist = FlatField(img.getType(), twist_set)
twist.setSamples(img.getValues(Boolean(0)),0)
#some formatting for making this into an image
twistdom = getDomainType(twist)
twistrng = getRangeType(twist)
twist_maps = subs.makeMaps(twistdom[0],'x', twistdom[1],'y',
twistrng[0],'red',twistrng[1],'green',twistrng[2],'blue')
#Twist_Grid 2
twist_grid2 = [ [w for h in xrange(height) for w in xrange(width)],
[(w-(h*0.3)) for h in xrange(height) for w in xrange(width)]]
twist_set2 = Gridded2DSet(set.getType(), twist_grid2, width, height, None,
None, None, 0)
twist2 = FlatField(img.getType(), twist_set2)
twist2.setSamples(img.getValues(Boolean(0)),0)
#some formatting for making this into an image
twistdom2 = getDomainType(twist2)
twistrng2 = getRangeType(twist2)
twist_maps2 = subs.makeMaps(twistdom2[0],'x', twistdom2[1],'y',
twistrng2[0],'red',twistrng2[1],'green',twistrng2[2],'blue')
#define twist events for stretching image in y direction
def twist1(event):
dispt = subs.makeDisplay(twist_maps)
dispt.addData("twisted",twist)
dispt.setBoxSize(.5)
displayPanelOne = JPanel(border=border.TitledBorder("Display Panel"),
layout=GridLayout(1,2,5,5))
displayPanelOne.add(dispt.getComponent())
displayPanelOne.add(plotd.getComponent())
pane.add("Center", displayPanelOne)
# pane.add("South", buttonPanel)
#twist event 2
def twist2(event):
dispt = subs.makeDisplay(twist_maps2)
if ref is None:
ref=dispt.addData("twisted2", twist2)
else:
ref=dispt.setData(twist2)
dispt.setBoxSize(.5)
displayPanelTwo = JPanel(border=border.TitledBorder("Display Panel"),
layout=GridLayout(1,2,5,5))
displayPanelTwo.add(dispt.getComponent())
displayPanelTwo.add(plotd.getComponent())
pane.add("Center", displayPanelTwo)
pane.add("South", buttonPanel)
# Display data for making an overall display...starting with the original
image
imgdom = getDomainType(img)
imgrng = getRangeType(img)
maps = subs.makeMaps(imgdom[0],'x', imgdom[1],'y',
imgrng[0],'red',imgrng[1],'green',imgrng[2],'blue')
disp = subs.makeDisplay(maps)
disp.addData("original",img)
disp.setBoxSize(.5)
# subs for as yet unused plot panel
m2 = subs.makeMaps(imgdom[0],"x",imgrng[0],"y",imgdom[1],"selectvalue")
plotd = subs.makeDisplay(m2)
subs.setBoxSize(plotd,.60)
# change the scale label on x axis
xscale=AxisScale(m2[0],label="Intensity Profile")
showAxesScales(plotd,1)
frame = JFrame("Image Stretcher")
pane = frame.getContentPane()
pane.setLayout(BorderLayout())
displayPanel = JPanel(border=border.TitledBorder("Display Panel"),
layout=GridLayout(1,2,5,5))
#add original image first
displayPanel.add(disp.getComponent())
displayPanel.add(plotd.getComponent())
#some program calls to add stretched image when buttons are clicked
buttonPanel = JPanel(border=border.TitledBorder("Y-Stretch Controls"),
layout=FlowLayout())
stretchButton=JButton("x2", preferredSize=(100,20), actionPerformed=twist1)
stretchButton2=JButton("x3", preferredSize=(100,20), actionPerformed=twist2)
buttonPanel.add(stretchButton, FlowLayout())
buttonPanel.add(stretchButton2, FlowLayout())
#add all contents to content pane
pane.add("Center", displayPanel)
pane.add("South", buttonPanel)
frame.setSize(800, 500)
frame.setVisible(1)
------- imagereplace2.py end ---------------
