require 'Qt' class TQt::Point def to_s "(#{x}, #{y})" end end $t = binding def test(str) puts "#{str.ljust 25} => #{eval(str, $t)}" end test("p1 = TQt::Point.new(5,5)") test("p2 = TQt::Point.new(20,20)") test("p1 + p2") test("p1 - p2") test("-p1 + p2") test("p2 += p1") test("p2 -= p1") test("p2 * 3") class TQt::Region def to_s "(#{isNull})" end end test("r1 = TQt::Region.new()") test("r2 = TQt::Region.new( 100,100,200,80, TQt::Region::Ellipse )") test("r1 + r2") class TQt::WMatrix def to_s "(#{m11}, #{m12}, #{m21}, #{m22}, #{dx}, #{dy})" end end test("a = Math::PI/180 * 25") # convert 25 to radians test("sina = Math.sin(a)") test("cosa = Math.cos(a)") test("m1 = TQt::WMatrix.new(1, 0, 0, 1, 10, -20)") # translation matrix test("m2 = TQt::WMatrix.new( cosa, sina, -sina, cosa, 0, 0 )") test("m3 = TQt::WMatrix.new(1.2, 0, 0, 0.7, 0, 0)") # scaling matrix test("m = TQt::WMatrix.new") test("m = m3 * m2 * m1") # combine all transformations