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36 lines
1.4 KiB
Python
36 lines
1.4 KiB
Python
from contextlib import nullcontext
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from .backend_cairo import FigureCanvasCairo
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from .backend_gtk3 import GLib, Gtk, FigureCanvasGTK3, _BackendGTK3
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class FigureCanvasGTK3Cairo(FigureCanvasCairo, FigureCanvasGTK3):
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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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allocation = self.get_allocation()
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# Render the background before scaling, as the allocated size here is in
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# logical pixels.
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Gtk.render_background(
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self.get_style_context(), ctx,
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0, 0, allocation.width, allocation.height)
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scale = self.device_pixel_ratio
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# Scale physical drawing to logical size.
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ctx.scale(1 / scale, 1 / scale)
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self._renderer.set_context(ctx)
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# Set renderer to physical size so it renders in full resolution.
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self._renderer.width = allocation.width * scale
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self._renderer.height = allocation.height * scale
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self._renderer.dpi = self.figure.dpi
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self.figure.draw(self._renderer)
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@_BackendGTK3.export
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class _BackendGTK3Cairo(_BackendGTK3):
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FigureCanvas = FigureCanvasGTK3Cairo
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