Commit 872675c

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Implement blocking Qt event loop.

Avoids raising a deprecation warning (due to use of the default busy waiting loop) when running e.g. ``` plt.gca(); plt.gcf().ginput(4) ``` or ``` plt.gca(); plt.gcf().ginput(4, timeout=2) ``` The implementation is similar to the one for the Wx backend.

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+11

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lib/matplotlib/backends
- backend_qt5.py

1 file changed

+11

-10

lines changed

`‎lib/matplotlib/backends/backend_qt5.py`

Lines changed: 11 additions & 10 deletions

Original file line number	Diff line number	Diff line change
`@@ -430,16 +430,17 @@ def flush_events(self):`
`430`	`430`	`global qApp`
`431`	`431`	`qApp.processEvents()`
`432`	`432`
`433`		`- def start_event_loop(self, timeout):`
`434`		`- FigureCanvasBase.start_event_loop_default(self, timeout)`
`435`		`-`
`436`		`- start_event_loop.__doc__ = \`
`437`		`- FigureCanvasBase.start_event_loop_default.__doc__`
`438`		`-`
`439`		`- def stop_event_loop(self):`
`440`		`- FigureCanvasBase.stop_event_loop_default(self)`
`441`		`-`
`442`		`- stop_event_loop.__doc__ = FigureCanvasBase.stop_event_loop_default.__doc__`
	`433`	`+ def start_event_loop(self, timeout=0):`
	`434`	`+ if hasattr(self, "_event_loop") and self._event_loop.isRunning():`
	`435`	`+ raise RuntimeError("Event loop already running")`
	`436`	`+ self._event_loop = event_loop = QtCore.QEventLoop()`
	`437`	`+ if timeout:`
	`438`	`+ timer = QtCore.QTimer.singleShot(timeout * 1000, event_loop.quit)`
	`439`	`+ event_loop.exec_()`
	`440`	`+`
	`441`	`+ def stop_event_loop(self, event=None):`
	`442`	`+ if hasattr(self, "_event_loop"):`
	`443`	`+ self._event_loop.quit()`
`443`	`444`
`444`	`445`
`445`	`446`	`class MainWindow(QtWidgets.QMainWindow):`

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Commit 872675c

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1 file changed

1 file changed

`‎lib/matplotlib/backends/backend_qt5.py`

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