a custom shape, that could be wrapped in a function
# File gtk2/sample/gtk-demo/cairo-curve-rectangle.rb, line 29 def draw(cr) return if (RECT_WIDTH <= 0 || RECT_HEIGHT <= 0) if (RECT_WIDTH / 2 < RADIUS) if (RECT_HEIGHT / 2 < RADIUS) cr.move_to(X0, (Y0 + Y1) / 2) cr.curve_to(X0 ,Y0, X0, Y0, (X0 + X1) / 2, Y0) cr.curve_to(X1, Y0, X1, Y0, X1, (Y0 + Y1) / 2) cr.curve_to(X1, Y1, X1, Y1, (X1 + X0) / 2, Y1) cr.curve_to(X0, Y1, X0, Y1, X0, (Y0 + Y1) / 2) else cr.move_to(X0, Y0 + RADIUS) cr.curve_to(X0 ,Y0, X0, Y0, (X0 + X1) / 2, Y0) cr.curve_to(X1, Y0, X1, Y0, X1, Y0 + RADIUS) cr.line_to(X1 , Y1 - RADIUS) cr.curve_to(X1, Y1, X1, Y1, (X1 + X0) / 2, Y1) cr.curve_to(X0, Y1, X0, Y1, X0, Y1- RADIUS) end else if (RECT_HEIGHT / 2 < RADIUS) cr.move_to(X0, (Y0 + Y1) / 2) cr.curve_to(X0, Y0, X0 , Y0, X0 + RADIUS, Y0) cr.line_to(X1 - RADIUS, Y0) cr.curve_to(X1, Y0, X1, Y0, X1, (Y0 + Y1) / 2) cr.curve_to(X1, Y1, X1, Y1, X1 - RADIUS, Y1) cr.line_to(X0 + RADIUS, Y1) cr.curve_to(X0, Y1, X0, Y1, X0, (Y0 + Y1) / 2) else cr.move_to(X0, Y0 + RADIUS) cr.curve_to(X0 , Y0, X0 , Y0, X0 + RADIUS, Y0) cr.line_to(X1 - RADIUS, Y0) cr.curve_to(X1, Y0, X1, Y0, X1, Y0 + RADIUS) cr.line_to(X1 , Y1 - RADIUS) cr.curve_to(X1, Y1, X1, Y1, X1 - RADIUS, Y1) cr.line_to(X0 + RADIUS, Y1) cr.curve_to(X0, Y1, X0, Y1, X0, Y1- RADIUS) end end cr.close_path cr.set_source_rgba(0.5,0.5,1) cr.fill_preserve cr.set_source_rgba(0.5, 0, 0, 0.5) cr.stroke end
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