Python examples.Box類代碼示例

    def test_minimal_se(self):
        """
        Test resizing of element by dragging it SE handle.
        """
        canvas = Canvas()
        box = Box()
        handles = box.handles()

        canvas.add(box)

        h_nw, h_ne, h_se, h_sw = handles
        assert h_nw is handles[NW]
        assert h_ne is handles[NE]
        assert h_sw is handles[SW]
        assert h_se is handles[SE]

        h_se.pos.x -= 20      # h.se.{x,y} == -10
        h_se.pos.y -= 20
        assert h_se.pos.x == h_se.pos.y == -10

        box.request_update()
        canvas.update()

        self.assertEquals(10, h_se.pos.x) # h_se changed above, should be 10
        self.assertEquals(10, h_se.pos.y)

        self.assertEquals(10, h_ne.pos.x)
        self.assertEquals(10, h_sw.pos.y)

def create_canvas(canvas, title):
    # Setup drawing window
    view = GtkView()
    view.painter = DefaultPainter()
    view.canvas = canvas
    window = Gtk.Window()
    window.set_title(title)
    window.set_default_size(400, 400)
    win_box = Gtk.Box(orientation=Gtk.Orientation.HORIZONTAL)
    window.add(win_box)
    win_box.pack_start(view, True, True, 0)

    # Draw first gaphas box
    b1 = Box(60, 60)
    b1.matrix = (1.0, 0.0, 0.0, 1, 10, 10)
    canvas.add(b1)

    # Draw second gaphas box
    b2 = Box(60, 60)
    b2.min_width = 40
    b2.min_height = 50
    b2.matrix.translate(170, 170)
    canvas.add(b2)

    # Draw gaphas line
    line = Line()
    line.matrix.translate(100, 60)
    canvas.add(line)
    line.handles()[1].pos = (30, 30)

    window.show_all()
    window.connect("destroy", Gtk.main_quit)

    def __init__(self):
        self.canvas = Canvas()

        self.box1 = Box()
        self.canvas.add(self.box1)
        self.box1.matrix.translate(100, 50)
        self.box1.width = 40
        self.box1.height = 40
        self.box1.request_update()

        self.box2 = Box()
        self.canvas.add(self.box2)
        self.box2.matrix.translate(100, 150)
        self.box2.width = 50
        self.box2.height = 50
        self.box2.request_update()

        self.line = Line()
        self.head = self.line.handles()[0]
        self.tail = self.line.handles()[-1]
        self.tail.pos = 100, 100
        self.canvas.add(self.line)

        self.canvas.update_now()
        self.view = GtkView()
        self.view.canvas = self.canvas

        self.win = Gtk.Window()
        self.win.add(self.view)
        self.view.show()
        self.view.update()
        self.win.show()

        self.tool = ConnectHandleTool(self.view)

    def test_get_item_at_point(self):
        """
        Hover tool only reacts on motion-notify events
        """
        canvas = Canvas()
        view = GtkView(canvas)
        window = gtk.Window(gtk.WINDOW_TOPLEVEL)
        window.add(view)
        window.show_all()

        box = Box()
        canvas.add(box)
        # No gtk main loop, so updates occur instantly
        assert not canvas.require_update()
        box.width = 50
        box.height = 50

        # Process pending (expose) events, which cause the canvas to be drawn.
        while gtk.events_pending():
            gtk.main_iteration()

        assert len(view._qtree._ids) == 1
        assert not view._qtree._bucket.bounds == (0, 0, 0, 0), view._qtree._bucket.bounds

        assert view.get_item_at_point((10, 10)) is box
        assert view.get_item_at_point((60, 10)) is None

        window.destroy()

    def testUndoOnDeletedElement(self):
        b1 = Box()

        b2 = Box()
        line = Line()

        canvas = Canvas()
        canvas.add(b1)
        self.assertEquals(6, len(canvas.solver.constraints))

        canvas.add(b2)
        self.assertEquals(12, len(canvas.solver.constraints))

        canvas.add(line)

        sink = ConnectionSink(b1, b1.ports()[0])
        connector = Connector(line, line.handles()[0])
        connector.connect(sink)

        sink = ConnectionSink(b2, b2.ports()[0])
        connector = Connector(line, line.handles()[-1])
        connector.connect(sink)

        self.assertEquals(14, len(canvas.solver.constraints))
        self.assertEquals(2, len(list(canvas.get_connections(item=line))))

        del undo_list[:]

        # Here disconnect is not invoked!
        canvas.remove(b2)

        self.assertEquals(7, len(canvas.solver.constraints))
        self.assertEquals(1, len(list(canvas.get_connections(item=line))))

        cinfo = canvas.get_connection(line.handles()[0])
        self.assertEquals(b1, cinfo.connected)

        cinfo = canvas.get_connection(line.handles()[-1])
        self.assertEquals(None, cinfo)

        self.assertEquals([], list(canvas.solver.constraints_with_variable(line.handles()[-1].pos.x)))
        self.assertEquals([], list(canvas.solver.constraints_with_variable(line.handles()[-1].pos.y)))

        undo()

        self.assertEquals(14, len(canvas.solver.constraints))
        self.assertEquals(2, len(list(canvas.get_connections(item=line))))

        cinfo = canvas.get_connection(line.handles()[0])
        self.assertEquals(b1, cinfo.connected)

        cinfo = canvas.get_connection(line.handles()[-1])
        self.assertEquals(b2, cinfo.connected)

def test_undo_on_delete_element(revert_undo, undo_fixture):
    b1 = Box()
    b2 = Box()
    line = Line()

    canvas = Canvas()
    canvas.add(b1)
    assert 2 == len(canvas.solver.constraints)

    canvas.add(b2)
    assert 4 == len(canvas.solver.constraints)

    canvas.add(line)

    sink = ConnectionSink(b1, b1.ports()[0])
    connector = Connector(line, line.handles()[0])
    connector.connect(sink)

    sink = ConnectionSink(b2, b2.ports()[0])
    connector = Connector(line, line.handles()[-1])
    connector.connect(sink)

    assert 6 == len(canvas.solver.constraints)
    assert 2 == len(list(canvas.get_connections(item=line)))

    del undo_fixture[2][:]  # Clear undo_list

    # Here disconnect is not invoked!
    canvas.remove(b2)

    assert 3 == len(canvas.solver.constraints)
    assert 1 == len(list(canvas.get_connections(item=line)))

    cinfo = canvas.get_connection(line.handles()[0])
    assert b1 == cinfo.connected

    cinfo = canvas.get_connection(line.handles()[-1])
    assert cinfo is None

    assert [] == list(canvas.solver.constraints_with_variable(line.handles()[-1].pos.x))
    assert [] == list(canvas.solver.constraints_with_variable(line.handles()[-1].pos.y))

    undo_fixture[0]()  # Call undo

    assert 6 == len(canvas.solver.constraints)
    assert 2 == len(list(canvas.get_connections(item=line)))

    cinfo = canvas.get_connection(line.handles()[0])
    assert b1 == cinfo.connected

    cinfo = canvas.get_connection(line.handles()[-1])
    assert b2 == cinfo.connected

def test_update_matrices():
    """Test updating of matrices"""
    c = Canvas()
    i = Box()
    ii = Box()
    c.add(i)
    c.add(ii, i)

    i.matrix = (1.0, 0.0, 0.0, 1.0, 5.0, 0.0)
    ii.matrix = (1.0, 0.0, 0.0, 1.0, 0.0, 8.0)

    updated = c.update_matrices([i])

    assert i._matrix_i2c == cairo.Matrix(1, 0, 0, 1, 5, 0)
    assert ii._matrix_i2c == cairo.Matrix(1, 0, 0, 1, 5, 8)

    def test_update_matrices(self):
        """Test updating of matrices"""
        c = Canvas()
        i = Box()
        ii = Box()
        c.add(i)
        c.add(ii, i)

        i.matrix = (1.0, 0.0, 0.0, 1.0, 5.0, 0.0)
        ii.matrix = (1.0, 0.0, 0.0, 1.0, 0.0, 8.0)

        updated = c.update_matrices([i])

        self.assertEquals(i._matrix_i2c, cairo.Matrix(1, 0, 0, 1, 5, 0))
        self.assertEquals(ii._matrix_i2c, cairo.Matrix(1, 0, 0, 1, 5, 8))

    def test_connect_item(self):
        b1 = Box()
        b2 = Box()
        l = Line()
        c = Canvas()
        c.add(b1)
        c.add(b2)
        c.add(l)

        c.connect_item(l, l.handles()[0], b1, b1.ports()[0])
        assert count(c.get_connections(handle=l.handles()[0])) == 1

        # Add the same
        self.assertRaises(ConnectionError, c.connect_item, l, l.handles()[0], b1, b1.ports()[0])
        assert count(c.get_connections(handle=l.handles()[0])) == 1

def test_connect_item():
    b1 = Box()
    b2 = Box()
    line = Line()
    c = Canvas()
    c.add(b1)
    c.add(b2)
    c.add(line)

    c.connect_item(line, line.handles()[0], b1, b1.ports()[0])
    assert count(c.get_connections(handle=line.handles()[0])) == 1

    # Add the same
    with pytest.raises(ConnectionError):
        c.connect_item(line, line.handles()[0], b1, b1.ports()[0])
    assert count(c.get_connections(handle=line.handles()[0])) == 1

    def test_get_handle_at_point(self):
        canvas = Canvas()
        view = GtkView(canvas)
        window = gtk.Window(gtk.WINDOW_TOPLEVEL)
        window.add(view)
        window.show_all()

        box = Box()
        box.min_width = 20
        box.min_height = 30
        box.matrix.translate(20, 20)
        box.matrix.rotate(math.pi/1.5)
        canvas.add(box)

        i, h = view.get_handle_at_point((20, 20))
        assert i is box
        assert h is box.handles()[0]

    def test_creation_with_size(self):
        """
        Test if initial size holds when added to a canvas.
        """
        canvas = Canvas()
        box = Box(150, 153)

        assert box.width == 150, box.width
        assert box.height == 153, box.height
        assert box.handles()[SE].pos.x == 150, box.handles()[SE].pos.x
        assert box.handles()[SE].pos.y == 153, box.handles()[SE].pos.y

        canvas.add(box)

        assert box.width == 150, box.width
        assert box.height == 153, box.height
        assert box.handles()[SE].pos.x == 150, box.handles()[SE].pos.x
        assert box.handles()[SE].pos.y == 153, box.handles()[SE].pos.y

    def test_disconnect_item_with_callback(self):
        b1 = Box()
        b2 = Box()
        l = Line()
        c = Canvas()
        c.add(b1)
        c.add(b2)
        c.add(l)

        events = []
        def callback():
            events.append('called')

        c.connect_item(l, l.handles()[0], b1, b1.ports()[0], callback=callback)
        assert count(c.get_connections(handle=l.handles()[0])) == 1

        c.disconnect_item(l, l.handles()[0])
        assert count(c.get_connections(handle=l.handles()[0])) == 0
        assert events == ['called']

    def test_line_projection(self):
        """Test projection with line's handle on element's side"""
        line = Line()
        line.matrix.translate(15, 50)
        h1, h2 = line.handles()
        h1.x, h1.y = 0, 0
        h2.x, h2.y = 20, 20

        box = Box()
        box.matrix.translate(10, 10)
        box.width = 40
        box.height = 20
        h_nw, h_ne, h_se, h_sw = box.handles()

        canvas = Canvas()
        canvas.add(line)
        canvas.add(box)

        # move line's second handle on box side
        h2.x, h2.y = 5, -20

def test_disconnect_item_with_callback():
    b1 = Box()
    b2 = Box()
    line = Line()
    c = Canvas()
    c.add(b1)
    c.add(b2)
    c.add(line)

    events = []

    def callback():
        events.append("called")

    c.connect_item(line, line.handles()[0], b1, b1.ports()[0], callback=callback)
    assert count(c.get_connections(handle=line.handles()[0])) == 1

    c.disconnect_item(line, line.handles()[0])
    assert count(c.get_connections(handle=line.handles()[0])) == 0
    assert events == ["called"]