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libqt.py
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Mon, May 20, 03:55

libqt.py
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from PyQt4 import QtCore, QtGui
from numpy import *
import pNbody
from libutil import *
from PIL import ImageQt
def rgb(r, g, b):
# use qRgb to pack the colors, and then turn the resulting long
# into a negative integer with the same bitpattern.
return (QtGui.qRgb(r, g, b) & 0xffffff) - 0x1000000
class QNumarrayImage(QtGui.QImage):
'''
QNumarrayImage class
'''
def __init__(self, data, palette_name):
format = QtGui.QImage.Format_Indexed8
# include the palette
palette = Palette(palette_name)
#data = data*0+64
data = data.astype(uint8)
# give the right form
shape = data.shape
data = transpose(data)
data = ravel(data)
data.shape=shape
self.__data = data.tostring()
# init object
QtGui.QImage.__init__(self, self.__data, data.shape[0], data.shape[1], format)
# color table
colortable = []
for i in range(256):
colortable.append(rgb(palette.r[i],palette.g[i],palette.b[i]))
self.setColorTable(colortable)
def qtplot(mat,palette='light'):
'''
plot a matrix using qt
'''
app = QtGui.QApplication(sys.argv)
imageLabel = QtGui.QLabel()
imageLabel.setScaledContents(True)
matint,mn,mx,cd = set_ranges(mat,scale='lin',mn=None,mx=None,cd=None)
# without qt
imageQt = QNumarrayImage(matint,palette)
# using PIL
#imagePIL = get_image(matint,name=None,palette_name=palette)
#imageQt = ImageQt.ImageQt(imagePIL)
imageLabel.setPixmap(QtGui.QPixmap.fromImage(imageQt))
imageLabel.show()
sys.exit(app.exec_())
def display(imagePIL):
'''
display a PIL image
'''
imageQt = ImageQt.ImageQt(imagePIL)
global app
app = QtGui.QApplication.instance()
if (app is None):
app = QtGui.QApplication(sys.argv)
imageLabel = QtGui.QLabel()
imageLabel.setScaledContents(True)
imageLabel.setPixmap(QtGui.QPixmap.fromImage(imageQt))
imageLabel.setWindowTitle('Image')
imageLabel.show()
# sys.exit(app.exec_())
app.exec_()

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