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33 lines
1.1 KiB
Python
33 lines
1.1 KiB
Python
from contextlib import nullcontext
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from .backend_cairo import FigureCanvasCairo
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from .backend_gtk4 import GLib, Gtk, FigureCanvasGTK4, _BackendGTK4
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class FigureCanvasGTK4Cairo(FigureCanvasCairo, FigureCanvasGTK4):
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def _set_device_pixel_ratio(self, ratio):
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# Cairo in GTK4 always uses logical pixels, so we don't need to do anything for
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# changes to the device pixel ratio.
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return False
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def on_draw_event(self, widget, ctx):
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if self._idle_draw_id:
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GLib.source_remove(self._idle_draw_id)
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self._idle_draw_id = 0
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self.draw()
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with (self.toolbar._wait_cursor_for_draw_cm() if self.toolbar
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else nullcontext()):
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self._renderer.set_context(ctx)
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allocation = self.get_allocation()
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Gtk.render_background(
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self.get_style_context(), ctx,
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allocation.x, allocation.y,
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allocation.width, allocation.height)
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self.figure.draw(self._renderer)
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@_BackendGTK4.export
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class _BackendGTK4Cairo(_BackendGTK4):
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FigureCanvas = FigureCanvasGTK4Cairo
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