tibia-client/modules/core_lib/widgets/uiscrollbar.lua

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UIScrollBar = extends(UIWidget)
-- private functions
local function calcValues(self)
local slider = self:getChildById('sliderButton')
local decrementButton = self:getChildById('decrementButton')
local incrementButton = self:getChildById('incrementButton')
local pxrange, center
if self.orientation == 'vertical' then
pxrange = (self:getHeight() - decrementButton:getHeight() - decrementButton:getMarginTop() - decrementButton:getMarginBottom()
- incrementButton:getHeight() - incrementButton:getMarginTop() - incrementButton:getMarginBottom())
center = self:getY() + self:getHeight() / 2
else -- horizontal
pxrange = (self:getWidth() - decrementButton:getWidth() - decrementButton:getMarginLeft() - decrementButton:getMarginRight()
- incrementButton:getWidth() - incrementButton:getMarginLeft() - incrementButton:getMarginRight())
center = self:getX() + self:getWidth() / 2
end
local range = self.maximum - self.minimum + 1
local proportion = math.min(math.max(range*(self.step/range), 1), range)/range
local px = math.max(math.floor(proportion * pxrange), 10)
local offset = 0
if range > 1 then
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offset = math.ceil((((self.value - self.minimum) / (range - 1)) - 0.5) * (pxrange - px))
end
return range, pxrange, px, offset, center
end
local function updateSlider(self)
local slider = self:getChildById('sliderButton')
if slider == nil then return end
local range, pxrange, px, offset, center = calcValues(self)
if self.orientation == 'vertical' then
slider:setHeight(px)
slider:setMarginTop(offset)
else -- horizontal
slider:setWidth(px)
slider:setMarginLeft(offset)
end
if self.maximum == self.minimum then
self:disable()
else
self:enable()
end
end
local function parseSliderPos(self, pos)
local point
if self.orientation == 'vertical' then
point = pos.y
else
point = pos.x
end
local range, pxrange, px, offset, center = calcValues(self)
offset = math.min(math.max(point - center, -pxrange/2), pxrange/2)
local newvalue = math.floor(((offset / (pxrange - px)) + 0.5) * (range - 1)) + self.minimum
self:setValue(newvalue)
end
-- public functions
function UIScrollBar.create()
local scrollbar = UIScrollBar.internalCreate()
scrollbar:setFocusable(false)
scrollbar.value = 0
scrollbar.minimum = 0
scrollbar.maximum = 0
scrollbar.step = 1
scrollbar.orientation = 'vertical'
return scrollbar
end
function UIScrollBar:onSetup()
addEvent(function()
Mouse.bindAutoPress(self:getChildById('decrementButton'), function() self:decrement() end)
Mouse.bindAutoPress(self:getChildById('incrementButton'), function() self:increment() end)
Mouse.bindPressMove(self:getChildById('sliderButton'), function(mousePos, mouseMoved) parseSliderPos(self, mousePos) end)
updateSlider(self)
end)
end
function UIScrollBar:onStyleApply(styleName, styleNode)
for name,value in pairs(styleNode) do
if name == 'maximum' then
self:setMaximum(tonumber(value))
elseif name == 'minimum' then
self:setMinimum(tonumber(value))
elseif name == 'step' then
self:setStep(tonumber(value))
elseif name == 'orientation' then
self:setOrientation(value)
elseif name == 'value' then
self:setValue(value)
end
end
end
function UIScrollBar:decrement()
self:setValue(self.value - self.step)
end
function UIScrollBar:increment()
self:setValue(self.value + self.step)
end
function UIScrollBar:setMaximum(maximum)
if maximum == self.maximum then return end
self.maximum = maximum
if self.value > maximum then
self:setValue(maximum)
else
updateSlider(self)
end
end
function UIScrollBar:setMinimum(minimum)
if minimum == self.minimum then return end
self.minimum = minimum
if self.value < minimum then
self:setValue(minimum)
else
updateSlider(self)
end
end
function UIScrollBar:setRange(minimum, maximum)
self:setMinimum(minimum)
self:setMaximum(maximum)
end
function UIScrollBar:setValue(value)
value = math.max(math.min(value, self.maximum), self.minimum)
if self.value == value then return end
local delta = value - self.value
self.value = value
updateSlider(self)
signalcall(self.onValueChange, self, value, delta)
end
function UIScrollBar:setStep(step)
self.step = step
end
function UIScrollBar:setOrientation(orientation)
self.orientation = orientation
end
function UIScrollBar:onGeometryChange()
updateSlider(self)
end
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function UIScrollBar:onMouseWheel(mousePos, mouseWheel)
if mouseWheel == MouseWheelUp then
self:decrement()
else
self:increment()
end
return true
end
function UIScrollBar:getMaximum() return self.maximum end
function UIScrollBar:getMinimum() return self.minimum end
function UIScrollBar:getValue() return self.value end
function UIScrollBar:getStep() return self.step end
function UIScrollBar:getOrientation() return self.orientation end