Thank you for your previous post. Because of this, I have managed to get
the following code working. However, in function getPixel, in order to get
the commented out code to work, I need to pass imv (ImageView) and
pixelArray (the image) into getPixel. So when I change
imv.getView().scene().sigMouseMoved.connect(self.getPixel), which works
to
imv.getView().scene().sigMouseMoved.connect(lambda: self.getPixel(imv,
pixelArray)
I get an error informing me that there is no positional argument for pos;
thus,
Traceback (most recent call last):
File "C:\Users\scsssh\source\repo1\Weasel\Weasel.py", line 736, in
<lambda>
lambda: self.getPixel(imv, pixelArray))
TypeError: getPixel() missing 1 required positional argument: 'pos'
So, I think the question is how do I pass imv and pixelArray into getPixel
as function arguments.
def getPixel(self, pos):
try:
print ("Image position: {}".format(pos))
# container = imv.getView()
# if container.sceneBoundingRect().contains(pos):
# mousePoint = container.getViewBox().mapSceneToView (pos)
# x_i = round(mousePoint.x())
# y_i = round(mousePoint.y())
# if x_i > 0 and x_i < img.shape [ 0 ] \
# and y_i > 0 and y_i < img.shape [ 1 ]:
# print( "({}, {}) = {:0.2f}" . format ( x_i , y_i , img
[ x_i , y_i ]))
On Monday, February 17, 2020 at 3:19:11 PM UTC, Stephen Shillitoe wrote:
>
>
> I have built a PyQt5, Python 3.7 windows application that uses PyQtGraph
> to view monochrome (greyscale) Magnetic Resonance DICOM images. As I move
> the mouse pointer over the image, I would like to display the value of the
> pixel under the pointer on the window. There is no obvious (to me)
> functionality in PyQtGraph to do this. I would be very grateful for any
> suggestions by more experienced developers of how to do this. Here is an
> edited code segment showing how I display the image (pixelArray) in an MDI
> subwindow.
>
> layout = QVBoxLayout()
> widget = QWidget()
> widget.setLayout(layout)
> self.subWindow.setWidget(widget)
>
> imageViewer = pg.GraphicsLayoutWidget()
> viewBox = imageViewer.addViewBox()
> image= pg.ImageItem(border='w')
> viewBox.addItem(image)
> imageView = pg.ImageView(view=viewBox, imageItem=image)
> layout.addWidget(imageView)
> imageView.setImage(pixelArray)
>
>
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