62 lines
1.9 KiB
Python
62 lines
1.9 KiB
Python
import cairo
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from math import pi
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pngfile = 'vortex.me.png'
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class HandlerClass:
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def on_draw(self, widget, cr):
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print("on_draw")
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# Sets the operator to clear which deletes everything below
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# where an object is drawn
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cr.set_operator(cairo.OPERATOR_CLEAR)
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width = widget.get_allocated_width()
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height = widget.get_allocated_height()
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# Makes the mask fill the entire window
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cr.rectangle(0.0, 0.0, width, height)
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# Deletes everything in the window (since the compositing
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# operator is clear and mask fills the entire window
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cr.fill()
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# Set the compositing operator back to the default
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cr.set_operator(cairo.OPERATOR_OVER)
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if self.scale:
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w, h = widget.get_allocated_width(), widget.get_allocated_height()
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cr.scale(1.0 *w / self.width, 1.0*h/self.height)
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cr.set_source_surface(self.img, 0, 0)
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cr.paint()
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def __init__(self, halcomp,builder,useropts):
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self.builder = builder
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win = self.builder.get_object("window1")
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#win.set_decorated(False)
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self.img = cairo.ImageSurface.create_from_png(pngfile)
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self.width = self.img.get_width()
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self.height = self.img.get_height()
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# Makes the window paintable, so we can draw directly on it
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win.set_app_paintable(True)
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win.set_size_request(self.width, self.height)
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# This sets the windows colormap, so it supports transparency.
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# This will only work if the wm support alpha channel
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screen = win.get_screen()
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rgba = screen.get_rgba_visual()
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win.set_visual(rgba)
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# scaling the bitmap is possible by turning this on
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# however the fixed widget does NOT do proportional scaling
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self.scale = 1
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def get_handlers(halcomp,builder,useropts):
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return [HandlerClass(halcomp,builder,useropts)]
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