When switching file, check if previous detector selection exist for new file

[rodolakis]

Since PR #91, when closing #41, we did not address the case where one or more of the detectors selected do not exist in the next file. Cannot just rely on the table view row, need to check PV name,

[rodolakis]

• what to do about X? Often time from one scan to another the positioner will change (x,y,z,th etc). So maintaining X is probably not a realistic assumption. If X has a match when going from oldPvList to newPvList, then why not. But would probably stick to the 1st positioner if it exists, or index if it doesn't. Could use firstPos attribute for that.
• for the detector the method to update the Y selection appears to work on the plot, but at the moment the c checkboxes do not update accordingly, The attempts to use updateCheckboxes reverse the selection back to old PV selection. Need to test with the update_mda_mvc=False flag.

Lots of edge cases to address when playing with the no_positioner test folder:

==== Selected file: ARPES_0009.mda

Before: self.selectionField()={'Y': [2, 8, 12, 18, 19, 20], 'X': 1}
oldPvList=['Index', '29idc:m3.VAL', 'S:SRcurrentAI.VAL', 'EPS:29:ID:SS1:POSITION', '29idmono:ENERGY_MON', 'ID29:EnergySet.VAL', 'ID29:Energy.VAL', '29idb:ca1:read', '29idb:ca2:read', '29idb:ca3:read', '29idb:ca4:read', '29idb:ca5:read', '29idb:ca10:read', '29idb:ca12:read', '29idb:ca13:read', '29idc:ca2:read', '29idb:ca15:read', '29idc:ca1:read', '29idcEAV:Stats1:Total_RBV', '29idARPES:LS335:TC1:IN1', '29idARPES:LS335:TC1:IN2']
new_selection={'Y': [1, 7, 18, 19], 'X': 1}

After: self.selectionField()={'Y': [1, 7, 18, 19], 'X': 1}
newPvList=['Index', 'S:SRcurrentAI.VAL', 'EPS:29:ID:SS1:POSITION', '29idmono:ENERGY_MON', 'ID29:EnergySet.VAL', 'ID29:Energy.VAL', '29idb:ca1:read', '29idb:ca2:read', '29idb:ca3:read', '29idb:ca4:read', '29idb:ca5:read', '29idb:ca9:read', '29idb:ca12:read', '29idb:ca13:read', '29idc:ca2:read', '29idb:ca15:read', '29idc:ca1:read', '29idcScienta:Stats4:Total_RBV', '29idARPES:LS335:TC1:IN1', '29idARPES:LS335:TC1:IN2', '29idcScienta:HDF1:FileName']

doPlot called: args=('replace', {'Y': [1, 7, 18, 19], 'X': 1})
Application quitting ...
(mdaviz) [nefarian ~/src/mdaviz] mdaviz
Settings are saved in: /home/beams/RODOLAKIS/.config/BCDA-APS/mdaviz.ini
Application started ...

==== Selected file: ARPES_0001.mda

Before: self.selectionField()={'X': 1, 'Y': [2]}

After: self.selectionField()={'X': 1, 'Y': [2]}

doPlot called: args=('replace', {'X': 1, 'Y': [2]})

==== Selected file: ARPES_0009.mda

Before: self.selectionField()={'X': 1, 'Y': [2]}
new_selection={'Y': [1], 'X': 1}

After: self.selectionField()={'Y': [1], 'X': 1}

doPlot called: args=('replace', {'Y': [1], 'X': 1})
Traceback (most recent call last):
  File "/home/beams3/RODOLAKIS/src/mdaviz/mdaviz/select_fields_table_model.py", line 173, in setData
    self.setCheckbox(index, value)
  File "/home/beams3/RODOLAKIS/src/mdaviz/mdaviz/select_fields_table_model.py", line 204, in setCheckbox
    self.checkboxStateChanged.emit(self.plotFields()[0])
                                   ^^^^^^^^^^^^^^^^^
  File "/home/beams3/RODOLAKIS/src/mdaviz/mdaviz/select_fields_table_model.py", line 374, in plotFields
    column_number = self.columnNumber(column_name)
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/beams3/RODOLAKIS/src/mdaviz/mdaviz/select_fields_table_model.py", line 298, in columnNumber
    return self.columns().index(column_name)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ValueError: None is not in list
Aborted (core dumped)
(mdaviz) [nefarian ~/src/mdaviz] mdaviz
Settings are saved in: /home/beams/RODOLAKIS/.config/BCDA-APS/mdaviz.ini
Application started ...

==== Selected file: ARPES_0001.mda

Before: self.selectionField()={'X': 1, 'Y': [2]}

After: self.selectionField()={'X': 1, 'Y': [2]}

doPlot called: args=('replace', {'X': 1, 'Y': [2]})

==== Selected file: ARPES_0006.mda

Before: self.selectionField()={'X': 1, 'Y': [2]}
new_selection={'Y': [1], 'X': 1}

After: self.selectionField()={'Y': [1], 'X': 1}

doPlot called: args=('replace', {'Y': [1], 'X': 1})
Traceback (most recent call last):
  File "/home/beams3/RODOLAKIS/src/mdaviz/mdaviz/select_fields_table_model.py", line 173, in setData
    self.setCheckbox(index, value)
  File "/home/beams3/RODOLAKIS/src/mdaviz/mdaviz/select_fields_table_model.py", line 204, in setCheckbox
    self.checkboxStateChanged.emit(self.plotFields()[0])
                                   ^^^^^^^^^^^^^^^^^
  File "/home/beams3/RODOLAKIS/src/mdaviz/mdaviz/select_fields_table_model.py", line 374, in plotFields
    column_number = self.columnNumber(column_name)
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/beams3/RODOLAKIS/src/mdaviz/mdaviz/select_fields_table_model.py", line 298, in columnNumber
    return self.columns().index(column_name)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ValueError: None is not in list
Aborted (core dumped)
(mdaviz) [nefarian ~/src/mdaviz] mdaviz
Settings are saved in: /home/beams/RODOLAKIS/.config/BCDA-APS/mdaviz.ini
Application started ...

==== Selected file: ARPES_0001.mda

Before: self.selectionField()={'X': 1, 'Y': [2]}

After: self.selectionField()={'X': 1, 'Y': [2]}

doPlot called: args=('replace', {'X': 1, 'Y': [2]})

==== Selected file: ARPES_0005.mda

Before: self.selectionField()={'X': 1, 'Y': [2]}
new_selection={'Y': [1], 'X': 1}

After: self.selectionField()={'Y': [1], 'X': 1}

doPlot called: args=('replace', {'Y': [1], 'X': 1})

==== Selected file: ARPES_0008.mda

Before: self.selectionField()={'X': 1}
Traceback (most recent call last):
  File "/home/beams3/RODOLAKIS/src/mdaviz/mdaviz/mda_folder.py", line 327, in doFileSelected
    self.updateSelectionForNewPVs(oldPvList, newPvList)
  File "/home/beams3/RODOLAKIS/src/mdaviz/mdaviz/mda_folder.py", line 166, in updateSelectionForNewPVs
    posY = self.selectionField()['Y']
           ~~~~~~~~~~~~~~~~~~~~~^^^^^
KeyError: 'Y'
Aborted (core dumped)
(mdaviz) [nefarian ~/src/mdaviz] 

[rodolakis]

Those notes are just for me to pick it up where I left it tomorrow morning. Should not be too hard to address.

[rodolakis]

Another one before heading home:

==== Selected file: ARPES_0005.mda

Before: self.selectionField()={'Y': [2], 'X': 1}
new_selection={'Y': [1], 'X': 0}

After: self.selectionField()={'Y': [1], 'X': 0}

doPlot called: args=('replace', {'Y': [1], 'X': 0})

==== Selected file: mda_0002.mda

Before: self.selectionField()={'Y': [1], 'X': 0}
new_selection={'Y': [2], 'X': 1}

After: self.selectionField()={'Y': [2], 'X': 1}

doPlot called: args=('replace', {'Y': [2], 'X': 1})

onCheckboxStateChange called:  Auto-replace mda_0002 with {'Y': [1, 8], 'X': 0}
Traceback (most recent call last):
  File "/home/beams3/RODOLAKIS/src/mdaviz/mdaviz/select_fields_table_model.py", line 173, in setData
    self.setCheckbox(index, value)
  File "/home/beams3/RODOLAKIS/src/mdaviz/mdaviz/select_fields_table_model.py", line 204, in setCheckbox
    self.checkboxStateChanged.emit(self.plotFields()[0])
                                   ^^^^^^^^^^^^^^^^^
  File "/home/beams3/RODOLAKIS/src/mdaviz/mdaviz/select_fields_table_model.py", line 374, in plotFields
    column_number = self.columnNumber(column_name)
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/beams3/RODOLAKIS/src/mdaviz/mdaviz/select_fields_table_model.py", line 298, in columnNumber
    return self.columns().index(column_name)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ValueError: None is not in list
Aborted (core dumped)