mirror of
https://github.com/Insality/druid.git
synced 2025-06-27 10:27:47 +02:00
92 lines
2.0 KiB
Lua
92 lines
2.0 KiB
Lua
--- Druid slider component
|
|
-- @module druid.slider
|
|
|
|
local helper = require("druid.helper")
|
|
local const = require("druid.const")
|
|
local component = require("druid.component")
|
|
|
|
local M = component.create("slider", { const.ON_SWIPE })
|
|
|
|
|
|
local function on_change_value(self)
|
|
if self.callback then
|
|
self.callback(self:get_context(), self.value)
|
|
end
|
|
end
|
|
|
|
|
|
function M.init(self, node, end_pos, callback)
|
|
self.node = helper.get_node(node)
|
|
|
|
self.start_pos = gui.get_position(self.node)
|
|
self.pos = gui.get_position(self.node)
|
|
self.target_pos = self.pos
|
|
self.end_pos = end_pos
|
|
|
|
self.dist = self.end_pos - self.start_pos
|
|
self.is_drag = false
|
|
self.value = 0
|
|
self.callback = callback
|
|
|
|
assert(self.dist.x == 0 or self.dist.y == 0, "Slider for now can be only vertical or horizontal")
|
|
end
|
|
|
|
|
|
function M.on_input(self, action_id, action)
|
|
if action_id ~= const.ACTION_TOUCH then
|
|
return false
|
|
end
|
|
|
|
if gui.pick_node(self.node, action.x, action.y) then
|
|
if action.pressed then
|
|
self.pos = gui.get_position(self.node)
|
|
self.is_drag = true
|
|
end
|
|
end
|
|
|
|
if self.is_drag and not action.pressed then
|
|
-- move
|
|
self.pos.x = self.pos.x + action.dx
|
|
self.pos.y = self.pos.y + action.dy
|
|
|
|
local prev_x = self.target_pos.x
|
|
local prev_y = self.target_pos.y
|
|
|
|
self.target_pos.x = helper.clamp(self.pos.x, self.start_pos.x, self.end_pos.x)
|
|
self.target_pos.y = helper.clamp(self.pos.y, self.start_pos.y, self.end_pos.y)
|
|
|
|
gui.set_position(self.node, self.target_pos)
|
|
|
|
if prev_x ~= self.target_pos.x or prev_y ~= self.target_pos.y then
|
|
|
|
if self.dist.x > 0 then
|
|
self.value = (self.target_pos.x - self.start_pos.x) / self.dist.x
|
|
end
|
|
|
|
if self.dist.y > 0 then
|
|
self.value = (self.target_pos.y - self.start_pos.y) / self.dist.y
|
|
end
|
|
|
|
on_change_value(self)
|
|
end
|
|
end
|
|
|
|
if action.released then
|
|
self.is_drag = false
|
|
end
|
|
|
|
return self.is_drag
|
|
end
|
|
|
|
|
|
function M.set(self, value)
|
|
value = helper.clamp(value, 0, 1)
|
|
|
|
gui.set_position(self.node, self.start_pos + self.dist * value)
|
|
self.value = value
|
|
on_change_value(self)
|
|
end
|
|
|
|
|
|
return M
|