Do you just want to display the image, or have a plot on top of it? I use
this utility function to set up both, with a histogram (only tested with
PyQt5, 'pg' is of course pyqtgraph):
To update the image data, you would later call
widget.imageItem.setImage(...)
def add_plot_image_histogram(widget, image_data, show_plot_axes=False,
add_scale_buttons=False):
"""
Add a PlotItem, attached ImageItem, and HistogramLUTWidget to a QWidget.
(e.g. created in QTDesigner)
The image is offset such that integer plot coordinates correspond
to pixel centers rather than corners (which is the default).
widget: a QWidget
image_data: initial image data
show_plot_axes: if False, hide all the plot axes. If True, show
the default ('left' & 'bottom' are shown).
add_scale_buttons: if True, add up- and down-triangle buttons to
increase and decrease image color map limits and
a square button for resetting them (see
ImageItemUpdater).
returns None
"""
layout = QtGui.QGridLayout()
widget.setLayout(layout)
layout.setSpacing(0)
widget.plotView = pg.GraphicsView()
layout.addWidget(widget.plotView, 0, 0, 3, 1)
widget.plotItem = pg.PlotItem()
widget.plotItem.setAspectLocked()
widget.plotItem.resize = widget.resize
if not show_plot_axes:
for axis in ('left','bottom','top','right'):
widget.plotItem.showAxis(axis, False)
widget.plotView.setCentralItem(widget.plotItem)
widget.imageItem = pg.ImageItem(image=image_data)
# to make plotted points _centered_ on corresponding image pixels
widget.imageItem.translate(-.5,-.5)
# put image _behind_ plot
widget.imageItem.setZValue(-100)
if add_scale_buttons:
button_radius = 12 # pixels
image_height = widget.imageItem.height()
# 'up' button in upper-left corner
widget.up_button = Button(button_radius, typ='tu', \
parent=widget.imageItem)
widget.up_button.setPos(0, 0.95*image_height)
# 'down' button just below it
widget.down_button = Button(button_radius, typ='td', \
parent=widget.imageItem)
widget.down_button.setPos(0, 0.80*image_height)
# 'reset' (square) button in lower-left corner
widget.reset_button = Button(button_radius, typ='s',
parent=widget.imageItem)
widget.plotItem.addItem(widget.imageItem)
widget.histogramView = pg.GraphicsView()
On Monday, April 1, 2019 at 7:35:26 AM UTC-4, Iman Afrouzeh wrote:
>
> Thank you very much for your response.
> I have already done that but my problem is that I don't know how to call
> the data in it in the python script.
> I don't knwo what should I write instead if this:
>
> self.curve.setData(self.data)
> self.l = (self.l+self.n)
> self.line.setValue(self.bufferSize)
>
> ##########this is the place that I don't have any Idea to do
>
> I know it seems a silly question but I really couldn't find it with a lot
> of searches.
>
> Thank you in advance for your help.
>
> On Monday, April 1, 2019 at 1:34:16 AM UTC+1, Patrick wrote:
>>
>> Hi,
>>
>> Have you followed the instructions here?
>> http://www.pyqtgraph.org/documentation/how_to_use.html#embedding-widgets-inside-pyqt-applications
>>
>> Change your existing imgLabel to a GraphicsView object and then promote
>> it to a PlotWidget or GraphicsLayoutWidget as described there.
>>
>> Patrick
>>
>> On Saturday, 30 March 2019 02:10:55 UTC+10:30, Iman Afrouzeh wrote:
>>>
>>> Dear all,
>>> I am new in Python and maybe it seems that this question has been
>>> answered in other ways before but I could not figure it out after 2 days.
>>> I have a qtgraph plot and I want to show it in a QLabel, Qwidget or
>>> Graphicsview in a gui that I made in Qtdesigner but I can not find a direct
>>> way that shows that graph. I am streaming a video from a camera and I could
>>> easily show it in my GUI but I am struggling with this one.
>>> Thank you in advance for your help and comments.
>>>
>>> the problem is in showing
>>>
>>
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