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#123 Add mouse scroll for Scroll component

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Insality
2021-04-01 22:47:12 +03:00
parent 72efdc13bf
commit 2917affe5e
3 changed files with 52 additions and 1 deletions
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45
druid/base/scroll.lua
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@@ -54,10 +54,11 @@
local Event = require("druid.event")
local const = require("druid.const")
local helper = require("druid.helper")
local component = require("druid.component")
local Scroll = component.create("scroll", { component.ON_UPDATE, component.ON_LAYOUT_CHANGE })
local Scroll = component.create("scroll", { component.ON_INPUT, component.ON_UPDATE, component.ON_LAYOUT_CHANGE })
local function inverse_lerp(min, max, current)
@@ -102,6 +103,8 @@ end
-- @tfield[opt=0.2] number ANIM_SPEED Scroll gui.animation speed for scroll_to function
-- @tfield[opt=0] number EXTRA_STRETCH_SIZE extra size in pixels outside of scroll (stretch effect)
-- @tfield[opt=false] bool SMALL_CONTENT_SCROLL If true, content node with size less than view node size can be scrolled
-- @tfield[opt=25] bool WHEEL_SCROLL_SPEED The scroll speed via mouse wheel scroll or touchpad. Set to 0 to disable wheel scrolling
-- @tfield[opt=false] bool SMALL_CONTENT_SCROLL If true, invert direction for touchpad and mouse wheel scroll
function Scroll.on_style_change(self, style)
self.style = {}
self.style.EXTRA_STRETCH_SIZE = style.EXTRA_STRETCH_SIZE or 0
@@ -115,6 +118,8 @@ function Scroll.on_style_change(self, style)
self.style.INERT_SPEED = style.INERT_SPEED or 30
self.style.POINTS_DEADZONE = style.POINTS_DEADZONE or 20
self.style.SMALL_CONTENT_SCROLL = style.SMALL_CONTENT_SCROLL or false
self.style.WHEEL_SCROLL_SPEED = style.WHEEL_SCROLL_SPEED or 25
self.style.WHEEL_SCROLL_INVERTED = style.WHEEL_SCROLL_INVERTED or false
self._is_inert = not (self.style.FRICT == 0 or
self.style.FRICT_HOLD == 0 or
@@ -142,6 +147,10 @@ function Scroll.init(self, view_node, content_node)
self.drag.on_touch_start:subscribe(self._on_touch_start)
self.drag.on_touch_end:subscribe(self._on_touch_end)
self.hover = self.druid:new_hover(view_node)
self.hover.on_mouse_hover:subscribe(self._on_mouse_hover)
self._is_mouse_hover = false
self.on_scroll = Event()
self.on_scroll_to = Event()
self.on_point_scroll = Event()
@@ -175,6 +184,11 @@ function Scroll.update(self, dt)
end
function Scroll.on_input(self, action_id, action)
return self:_process_scroll_wheel(action_id, action)
end
function Scroll.on_remove(self)
self:bind_grid(nil)
end
@@ -703,4 +717,33 @@ function Scroll._update_params(self, dt)
end
function Scroll._process_scroll_wheel(self, action_id, action)
if not self._is_mouse_hover or self.style.WHEEL_SCROLL_SPEED == 0 then
return false
end
if action_id ~= const.ACTION_SCROLL_UP and action_id ~= const.ACTION_SCROLL_DOWN then
return false
end
local koef = (action_id == const.ACTION_SCROLL_UP) and 1 or -1
if self.style.WHEEL_SCROLL_INVERTED then
koef = -koef
end
if self.drag.can_y then
self.inertion.y = (self.inertion.y + self.style.WHEEL_SCROLL_SPEED * koef) * self.style.FRICT_HOLD
else
self.inertion.x = (self.inertion.x + self.style.WHEEL_SCROLL_SPEED * koef) * self.style.FRICT_HOLD
end
return true
end
function Scroll._on_mouse_hover(self, state)
self._is_mouse_hover = state
end
return Scroll