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local hello = pd.Class:new():register("hello-gui")
-- rendering speed (slows down rendering by the given factor)
-- In most cases it should be fine to just set this to 1 to run at full speed,
-- if you have a modern high-speed CPU and GPU. But we use a larger value as
-- default here to deal with low frame rates on some systems. You may have to
-- increase the value even further when running on low-spec systems like the
-- Raspberry Pi.
local R = 3
function hello:initialize(sel, atoms)
self.inlets = 1
self.circle_x = 485
self.circle_y = 15
self.circle_radius = 15
self.animation_speed = 2*R
self.delay_time = 16*R
self.draggable_rect_x = 550
self.draggable_rect_y = 130
self.draggable_rect_size = 50
self.dragging_rect = false
self.mouse_down_pos = {0, 0}
self.rect_down_pos = {0, 0}
self:set_size(630, 230)
return true
end
function math.clamp(val, lower, upper)
if lower > upper then lower, upper = upper, lower end -- swap if boundaries supplied the wrong way
return math.max(lower, math.min(upper, val))
end
function hello:postinitialize()
self.clock = pd.Clock:new():register(self, "tick")
self.clock:delay(self.delay_time)
end
function hello:finalize()
self.clock:destruct()
end
function hello:mouse_down(x, y)
if x > self.draggable_rect_x and y > self.draggable_rect_y and x < self.draggable_rect_x + self.draggable_rect_size and y < self.draggable_rect_y + self.draggable_rect_size then
dragging_rect = true
self.mouse_down_pos[0] = x
self.mouse_down_pos[1] = y
self.rect_down_pos[0] = self.draggable_rect_x
self.rect_down_pos[1] = self.draggable_rect_y
else
dragging_rect = false
end
end
function hello:mouse_drag(x, y)
if dragging_rect == true then
self.draggable_rect_x = self.rect_down_pos[0] + (x - self.mouse_down_pos[0])
self.draggable_rect_y = self.rect_down_pos[1] + (y - self.mouse_down_pos[1])
self.draggable_rect_x = math.clamp(self.draggable_rect_x, 0, 620 - self.draggable_rect_size)
self.draggable_rect_y = math.clamp(self.draggable_rect_y, 0, 230 - self.draggable_rect_size)
self:repaint(3)
end
end
function hello:paint(g)
g:set_color(50, 50, 50)
g:fill_all()
-- Filled examples
g:set_color(66, 207, 201, 0.3)
g:fill_ellipse(30, 50, 30, 30)
g:set_color(0, 159, 147, 1)
g:fill_rect(120, 50, 30, 30)
g:set_color(250, 84, 108, 1)
g:fill_rounded_rect(210, 50, 30, 30, 5)
g:set_color(252, 118, 81, 1)
-- Star using line_to paths
local starX1, starY1 = 310, 45
local starSize = 15
local star = Path(starX1, starY1)
-- Star using line_to paths
star:line_to(starX1 + 5, starY1 + 14)
star:line_to(starX1 + 20, starY1 + 14)
star:line_to(starX1 + 8, starY1 + 22)
star:line_to(starX1 + 14, starY1 + 36)
star:line_to(starX1, starY1 + 27)
star:line_to(starX1 - 14, starY1 + 36)
star:line_to(starX1 - 6, starY1 + 22)
star:line_to(starX1 - 18, starY1 + 14)
star:line_to(starX1 - 3, starY1 + 14)
star:close()
g:fill_path(star)
g:set_color(255, 219, 96, 1)
-- Bezier curve example
g:translate(140, 20)
g:scale(0.5, 1.0)
local curve = Path(450, 50)
curve:cubic_to(500, 30, 550, 70, 600, 50)
curve:close()
g:stroke_path(curve, 2)
g:reset_transform()
-- Stroked examples
g:set_color(66, 207, 201, 1)
g:stroke_ellipse(30, 150, 30, 30, 2)
g:set_color(0, 159, 147, 1)
g:stroke_rect(120, 150, 30, 30, 2)
g:set_color(250, 84, 108, 1)
g:stroke_rounded_rect(210, 150, 30, 30, 5, 2)
g:set_color(252, 118, 81, 1)
local starX2, starY2 = 310, 145
local starSize = 15
-- Star using line_to paths
local star2 = Path(starX2, starY2)
star2:line_to(starX2 + 5, starY2 + 14)
star2:line_to(starX2 + 20, starY2 + 14)
star2:line_to(starX2 + 8, starY2 + 22)
star2:line_to(starX2 + 14, starY2 + 36)
star2:line_to(starX2, starY2 + 27)
star2:line_to(starX2 - 14, starY2 + 36)
star2:line_to(starX2 - 6, starY2 + 22)
star2:line_to(starX2 - 18, starY2 + 14)
star2:line_to(starX2 - 3, starY2 + 14)
star2:close()
g:stroke_path(star2, 2)
g:set_color(255, 219, 96, 1)
-- Bezier curve example
g:translate(140, 20)
g:scale(0.5, 1.0)
local curve2 = Path(450, 150)
curve2:cubic_to(500, 130, 550, 170, 600, 150)
g:fill_path(curve2)
g:reset_transform()
-- Titles
g:set_color(252, 118, 81, 1)
g:draw_text("Ellipse", 25, 190, 120, 12)
g:draw_text("Rectangle", 100, 190, 120, 12)
g:draw_text("Rounded Rect", 188, 190, 120, 12)
g:draw_text("Paths", 295, 190, 120, 12)
g:draw_text("Bezier Paths", 360, 190, 120, 12)
g:draw_text("Animation", 460, 190, 120, 12)
g:draw_text(" Mouse\nInteraction", 540, 190, 120, 12)
end
function hello:paint_layer_2(g)
g:set_color(250, 84, 108, 1)
g:fill_ellipse(self.circle_x, self.circle_y, self.circle_radius, self.circle_radius)
end
function hello:paint_layer_3(g)
-- Draggable rectangle
g:set_color(66, 207, 201, 1)
g:fill_rounded_rect(self.draggable_rect_x, self.draggable_rect_y, self.draggable_rect_size, self.draggable_rect_size, 5)
g:set_color(0, 0, 0, 1)
g:draw_text("Drag\n me!", self.draggable_rect_x + 8, self.draggable_rect_y + 10, self.draggable_rect_size, 12)
end
function hello:tick()
self.circle_y = self.circle_y + self.animation_speed
if self.circle_y > 160 + self.circle_radius then
self.circle_y = -self.circle_radius
end
self:repaint(2)
self.clock:delay(self.delay_time)
end
function hello:in_1_bang()
self:repaint()
end
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