ok I managed to figure it out and posting here if some else has the same
question
I changed the plotting to imageItem
Enter code here...vb = pg.ViewBox()
self.ui.PMTVoltage_plt.useOpenGL()
self.ui.PMTVoltage_plt.setCentralItem(vb)
self.img = pg.ImageItem(pmtImage)
vb.addItem(self.img)
and then got the vb back in other function using
Enter code here...vb = self.ui.PMTVoltage_plt.getViewBox()
items = vb.mapSceneToView(event.scenePos())
pixels = vb.mapFromViewToItem(self.img, items)
On Wednesday, September 13, 2017 at 5:02:40 PM UTC-7, Pramod Butte wrote:
>
> Just add I went through the entire ui variable in debug to look for vb or
> image Item and could not find it.
>
> infact the only thing I found was,
>
> items = {dict} {<pyqtgraph.graphicsItems.ViewBox.ViewBox.ViewBox object at
> 0x000001CF73888CA8>: [(0, 0)]}
> <pyqtgraph.graphicsItems.ViewBox.ViewBox.ViewBox object at
> 0x000001CF73888CA8> (1990508186792) = {list} <class 'list'>: [(0, 0)]
> 0 = {tuple} <class 'tuple'>: (0, 0)
> 0 = {int} 0
> 1 = {int} 0
> __len__ = {int} 2
> __len__ = {int} 1
> __len__ = {int} 1
>
>
> On Wednesday, September 13, 2017 at 4:38:40 PM UTC-7, Pramod Butte wrote:
>>
>>
>> I am new to PyqtGraph ( Infact this is my first time)
>>
>> I have a Qt designer file which I import in my python code. I 6 windows
>> in which I plot a 42x22 (different sizes) as an inmage, these have been
>> promoted the graphicview.
>>
>> I have a data set which is 6x42x22 and so I use a for loop to plot the 6
>> images
>>
>>
>> for n in range(imageStackSize):
>> self.glayout = pg.GraphicsLayout()
>> self.vb = self.glayout.addViewBox()
>> self.vb.setAspectLocked(lock=True, ratio=self.aspect_ratio)
>> img_temp = image[n, :, :]
>>
>>
>> img = pg.ImageItem(img_temp, lut=self.jet_lut)
>> if n == 0:
>> self.ui.Channel1_img.setCentralItem(self.glayout)
>> self.vb.addItem(img)
>>
>> elif n == 1:
>> self.ui.Channel2_img.setCentralItem(self.glayout)
>> self.vb.addItem(img)
>>
>> elif n == 2:
>> self.ui.Channel3_img.setCentralItem(self.glayout)
>> self.vb.addItem(img)
>> elif n == 3:
>> self.ui.Channel4_img.setCentralItem(self.glayout)
>> self.vb.addItem(img)
>> elif n == 4:
>> self.ui.Channel5_img.setCentralItem(self.glayout)
>> self.vb.addItem(img)
>> elif n == 5:
>> self.ui.Channel6_img.setCentralItem(self.glayout)
>> self.vb.addItem(img)
>>
>>
>> After this I am trying to click on one of the image (ideally I would like
>> to make it such that I can click any of the six images) to get the (6,x,y)
>> coordinated the first dimension does not matter. In order to achieve this I
>> did
>>
>> self.ui.Channel1_img.scene().sigMouseClicked.connect(self.onClick)
>>
>> #self.ui.Channel2_img.scene().sigMouseClicked.connect(self.onClick)
>>
>> #self.ui.Channel3_img.scene().sigMouseClicked.connect(self.onClick)
>>
>> #self.ui.Channel4_img.scene().sigMouseClicked.connect(self.onClick)
>>
>> #self.ui.Channel5_img.scene().sigMouseClicked.connect(self.onClick)
>>
>> #self.ui.Channel6_img.scene().sigMouseClicked.connect(self.onClick)
>>
>> #self.ui.PMTVoltage_plt.scene().sigMouseClicked.connect(self.onClick)
>>
>> def onClick(self, event):
>> print("clicked")
>>
>> and then I tried
>> items =
>> self.ui.Channel1_img.imageItem.mapFromViewToItem(event.pos())
>> and
>> items =
>> self.ui.Channel1_img.imageItem.mapFromSceneToView(event.pos())
>>
>> but the prog just crashes. I read somewhere that the coordinates are in
>> the viewbox, but I cant seem to find the viewbox or vb in the
>> self.ui.Channel1_img
>>
>> what am I missing? Any help is appreciated
>>
>> thanks,
>> Pramod
>>
>
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