mirror of https://github.com/kepler155c/opus
108 lines
2.8 KiB
Lua
108 lines
2.8 KiB
Lua
local class = require('opus.class')
|
|
local UI = require('opus.ui')
|
|
local Util = require('opus.util')
|
|
|
|
UI.Slider = class(UI.Window)
|
|
UI.Slider.defaults = {
|
|
UIElement = 'Slider',
|
|
height = 1,
|
|
barChar = UI.extChars and '\140' or '-',
|
|
barColor = 'gray',
|
|
sliderChar = UI.extChars and '\143' or '\124',
|
|
sliderColor = 'blue',
|
|
sliderFocusColor = 'lightBlue',
|
|
leftBorder = UI.extChars and '\141' or '\124',
|
|
rightBorder = UI.extChars and '\142' or '\124',
|
|
labelWidth = 0,
|
|
value = 0,
|
|
min = 0,
|
|
max = 100,
|
|
event = 'slider_update',
|
|
transform = function(v) return Util.round(v, 2) end,
|
|
accelerators = {
|
|
right = 'slide_right',
|
|
left = 'slide_left',
|
|
}
|
|
}
|
|
function UI.Slider:setValue(value)
|
|
self.value = self.transform(tonumber(value) or self.min)
|
|
self.value = Util.clamp(self.value, self.min, self.max)
|
|
self:draw()
|
|
end
|
|
|
|
function UI.Slider:reset() -- form support
|
|
self.value = self.min
|
|
self:draw()
|
|
end
|
|
|
|
function UI.Slider:focus()
|
|
self:draw()
|
|
end
|
|
|
|
function UI.Slider:getSliderWidth()
|
|
local labelWidth = self.labelWidth > 0 and self.labelWidth + 1
|
|
return self.width - (labelWidth or 0)
|
|
end
|
|
|
|
function UI.Slider:draw()
|
|
local labelWidth = self.labelWidth > 0 and self.labelWidth + 1
|
|
local width = self.width - (labelWidth or 0)
|
|
local range = self.max - self.min
|
|
local perc = (self.value - self.min) / range
|
|
local progress = Util.clamp(1 + width * perc, 1, width)
|
|
|
|
local bar = self.leftBorder .. string.rep(self.barChar, width - 2) .. self.rightBorder
|
|
self:write(1, 1, bar, nil, self.barColor)
|
|
self:write(progress, 1, self.sliderChar, nil, self.focused and self.sliderFocusColor or self.sliderColor)
|
|
if labelWidth then
|
|
self:write(self.width - labelWidth + 2, 1, Util.widthify(tostring(self.value), self.labelWidth))
|
|
end
|
|
end
|
|
|
|
function UI.Slider:eventHandler(event)
|
|
if event.type == "mouse_down" or event.type == "mouse_drag" then
|
|
local pos = event.x - 1
|
|
if event.type == 'mouse_down' then
|
|
self.anchor = event.x - 1
|
|
else
|
|
pos = self.anchor + event.dx
|
|
end
|
|
local range = self.max - self.min
|
|
local i = pos / (self:getSliderWidth() - 1)
|
|
self:setValue(self.min + (i * range))
|
|
self:emit({ type = self.event, value = self.value, element = self })
|
|
return true
|
|
|
|
elseif event.type == 'slide_left' or event.type == 'slide_right' then
|
|
local range = self.max - self.min
|
|
local step = range / (self:getSliderWidth() - 1)
|
|
if event.type == 'slide_left' then
|
|
self:setValue(self.value - step)
|
|
else
|
|
self:setValue(self.value + step)
|
|
end
|
|
self:emit({ type = self.event, value = self.value, element = self })
|
|
return true
|
|
end
|
|
end
|
|
|
|
function UI.Slider.example()
|
|
return UI.Window {
|
|
UI.Slider {
|
|
y = 2, x = 2, ex = -2,
|
|
min = 0, max = 1,
|
|
},
|
|
UI.Slider {
|
|
y = 4, x = 2, ex = -2,
|
|
min = -1, max = 1,
|
|
labelWidth = 5,
|
|
},
|
|
UI.Slider {
|
|
y = 6, x = 2, ex = -2,
|
|
min = 0, max = 100,
|
|
labelWidth = 3,
|
|
transform = math.floor,
|
|
},
|
|
}
|
|
end
|