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GUI architecture for scientifjc workfmow
spaghetti-free, lazy-responsive, with capture & replay
Joachim Wuttke
Forschungszentrum Jülich GmbH, JCNS-MLZ Garching
Google image search for “model view” 1
GUI architecture for scientifjc workfmow spaghetti-free, - - PowerPoint PPT Presentation
GUI architecture for scientifjc workfmow spaghetti-free, - - PowerPoint PPT Presentation
GUI architecture for scientifjc workfmow spaghetti-free, lazy-responsive, with capture & replay Joachim Wuttke Forschungszentrum Jlich GmbH, JCNS-MLZ Garching Google image search for model view 1
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https://blogs.msdn.microsoft.com/erwinvandervalk 2
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Qt5 model/view classes
view is based on QAbstractItemView
- QListView
- QTableView
- QTreeView
model inherits from QAbstractItemModel
- QAbstractListModel
- QAbstractProxyModel
- QAbstractTableModel
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by Juanpe Bolivar (CppCon 2017) 4
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by Juanpe Bolivar (CppCon 2017) 5
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by Juanpe Bolivar (CppCon 2017) 6
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by Juanpe Bolivar (CppCon 2017) 7
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VIEW VIEW VIEWMODEL VIEWMODEL DATA
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core gui VIEW VIEW VIEWMODEL VIEWMODEL DATA
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core gui services VIEW VIEW VIEWMODEL VIEWMODEL LOGGER PARAMETER WRAPPERS DATA
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core gui services VIEW VIEWMODEL LOGGER PARAMETER WRAPPERS DATA Python API user script
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generated by Doxygen 12
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generated by Doxygen 13
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generated by Doxygen 14
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GUI:
qApp gMainWindow settings widgets menu triggers, toggles
= global variable Core:
gSession settings data raw reduced metadata images parameters results 15
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- prefer plain global variables over equivalent singletons
- prefer one global variable gSession over function calls like
f(session.Data, session.Parameters); which calls g(datafiles[iFile], parameterX , parameterZ); which calls h(datafile.metadata.A, parameterZ);
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How to keep this up to date?
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Signalling spaghetti (GUI ↔ Core) has its root in efgorts
- to restrict Core recomputation to data that have changed,
- to restrict GUI redrawing to Widgets that have changed.
Both are premature optimizations.
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Signalling spaghetti (GUI ↔ Core) has its root in efgorts
- to restrict Core recomputation to data that have changed,
- to restrict GUI redrawing to Widgets that have changed.
Both are premature optimizations. They do not even preclude duplication of Core computations.
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application view 1 view 2 data 1 data 2 data 3 data 4 parameter 19
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application view 1 view 2 data 1 data 2 data 3 data 4 parameter 20
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application view 1 view 2 data 1 data 2 data 3 data 4 parameter
declare invalid request refresh lazy evaluate
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GUI:
qApp gMainWindow settings widgets menu triggers, toggles request recompute
Core:
gSession settings data raw reduced metadata images parameters results request redisplay 22
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Bonus section: capture & replay
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Logging
Why?
- to debug,
- to profjle,
- to document provenance,
and to replay
- tests during development,
- functional tests,
- user sessions, especially upon bug reports.
Also related:
- Undo/Redo.
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Logging
How? By recording
- keyboard and mouse events,
- interrupts,
- user actions at widget level,
- GUI-to-core calls.
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Logging
How? By recording
- keyboard and mouse events,
- interrupts,
- user actions at widget level,
- GUI-to-core calls.
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application
control widgets command interpreter core command stack undo/redo log file text editor
test suite
test case test case test case test case test case test case GUI action textual command user tester 25
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QAction QCheckButton QSpinBox QComboBox QTabWidget QDoubleSpinBox QLineEdit QDialog QFileDialog QcrTrigger QcrToggle QcrCheckButton QcrSpinBox QcrComboBox QcrTabWidget QcrDoubleSpinBox QcrLineEdit QcrModelessDialog QcrModalDialog QcrFileDialog QcrControl<bool> QcrControl<int> QcrControl<double> QcrControl<QString> QcrModal QcrMixin jugit.fz-juelich.de:mlz/libQCR 26