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Add simple scroll events

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This commit is contained in:
Insality 2020-02-24 20:29:56 +03:00
parent d28b77bc9a
commit b1fbb7c5bf
1 changed files with 16 additions and 6 deletions
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22
druid/base/scroll.lua
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@ -1,6 +1,7 @@
--- Component to handle scroll content
-- @module druid.scroll
local Event = require("druid.event")
local helper = require("druid.helper")
local const = require("druid.const")
local component = require("druid.component")
@ -41,14 +42,21 @@ function M.init(self, scroll_parent, input_zone, border)
}
self:set_border(border)
self.on_scroll = Event()
self.on_scroll_to = Event()
self.on_point_scroll = Event()
end
local function set_pos(self, pos)
self.pos.x = pos.x
self.pos.y = pos.y
if self.pos.x ~= pos.x or self.pos.y ~= pos.y then
self.pos.x = pos.x
self.pos.y = pos.y
gui.set_position(self.node, self.pos)
gui.set_position(self.node, self.pos)
self.on_scroll:trigger(self:get_context(), self.pos)
end
end
@ -337,6 +345,8 @@ function M.scroll_to(self, point, is_instant)
set_pos(self, target)
end)
end
self.on_scroll_to:trigger(self:get_context(), point, is_instant)
end
@ -351,8 +361,8 @@ function M.scroll_to_index(self, index, skip_cb)
if self.selected ~= index then
self.selected = index
if not skip_cb and self.on_point_callback then
self.on_point_callback(self:get_context(), index, self.points[index])
if not skip_cb then
self.on_point_scroll:trigger(self:get_context(), index, self.points[index])
end
end
@ -395,7 +405,7 @@ end
-- @tparam table self Component instance
-- @tparam function callback Callback on scroll to point of interest
function M.on_point_move(self, callback)
self.on_point_callback = callback
self.on_point_scroll:subscribe(callback)
end