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Custom widgets that have rounded edges
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from gi.repository import Gdk, GdkPixbuf, GObject, Gtk
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from Theme import Color
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logger = logging.getLogger("RoundedWidgets")
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# Angles in pi/2 increments
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A3 = 3.0 * math.pi / 2.0
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def draw_rounded_box(cr, x, y, width, height, radius):
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"""Draws a rounded box to a cairo context, but doesn't fill or stroke it
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so it can be used as a clipping region as well."""
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cr.move_to(x1 + r, y1)
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cr.line_to(x2 - r, y1)
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cr.arc(x2 - r, y1 + r, r, A3, A4)
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cr.line_to(x2, y2 - r)
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cr.arc(x2 - r, y2 - r, r, A0, A1)
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cr.line_to(x1 + r, y2)
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cr.arc(x1 + r, y2 - r, r, A1, A2)
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cr.line_to(x1, y1 + r)
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cr.arc(x1 + r, y1 + r, r, A2, A3)
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class RoundedBox(Gtk.Box):
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"""A simple container that draws a solid background with rounded edges"""
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BACKGROUND_COLOR = Color("#fff")
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def __init__(self, radius = 10):
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GObject.GObject.__init__(self)
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self.set_double_buffered(False)
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self.set_redraw_on_allocate(True)
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def set_radius(self, radius):
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"""Sets the radius of the curved edges of this box"""
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"""Gets the radius of the curved edges of this box"""
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def do_expose_event(self, event):
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"""Draws the background and propagates the event to the children"""
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window = self.get_window()
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alloc = self.get_allocation()
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cr = window.cairo_create()
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# Set the clipping region
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cr.rectangle(event.area.x, event.area.y, event.area.width,
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color = RoundedBox.BACKGROUND_COLOR
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cr.set_source_rgb(color.red, color.green, color.blue)
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# Draw the rounded box
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draw_rounded_box(cr, alloc.x, alloc.y, alloc.width, alloc.height,
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# Propagate the event to the children
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for child in self.get_children():
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self.propagate_expose(child, event)
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class RoundedIcon(Gtk.Widget):
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"""Draws a pixbuf with rounded edges"""
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def __init__(self, pixbuf = None, radius = 10):
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GObject.GObject.__init__(self)
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self.set_has_window(False)
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self.set_double_buffered(False)
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self.set_redraw_on_allocate(True)
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def set_from_pixbuf(self, pixbuf):
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"""Sets the icon from a pixbuf"""
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self._pixbuf = pixbuf
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def do_expose_event(self, event):
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"""Draws the pixbuf"""
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pixbuf = self._pixbuf
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window = self.get_window()
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alloc = self.get_allocation()
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cr = window.cairo_create()
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w = pixbuf.get_width()
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h = pixbuf.get_height()
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if alloc.width < w or alloc.height < h:
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self.set_size_request(w, h)
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cr.translate(alloc.x, alloc.y)
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draw_rounded_box(cr, 0, 0,
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Gdk.cairo_set_source_pixbuf(cr, pixbuf, 0, 0)
added
removed
unity/RoundedWidgets.py
