42 lines
1.2 KiB
Python
42 lines
1.2 KiB
Python
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import numpy as np
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from .. import cbook
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from . import backend_agg, backend_gtk4
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from .backend_gtk4 import GLib, Gtk, _BackendGTK4
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import cairo # Presence of cairo is already checked by _backend_gtk.
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class FigureCanvasGTK4Agg(backend_agg.FigureCanvasAgg,
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backend_gtk4.FigureCanvasGTK4):
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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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scale = self.device_pixel_ratio
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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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buf = cbook._unmultiplied_rgba8888_to_premultiplied_argb32(
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np.asarray(self.get_renderer().buffer_rgba()))
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height, width, _ = buf.shape
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image = cairo.ImageSurface.create_for_data(
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buf.ravel().data, cairo.FORMAT_ARGB32, width, height)
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image.set_device_scale(scale, scale)
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ctx.set_source_surface(image, 0, 0)
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ctx.paint()
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return False
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@_BackendGTK4.export
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class _BackendGTK4Agg(_BackendGTK4):
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FigureCanvas = FigureCanvasGTK4Agg
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