[*] Initial commit.

choice.lua

@@ -0,0 +1,148 @@
+local BASE = (...):gsub('choice', '')
+
+local Widget = require BASE..'widget'
+local core = require BASE..'core'
+
+local shadowtext = require 'lib.gear.shadowtext'
+local T = require('lib.moonspeak').translate
+
+local Choice = setmetatable({}, Widget)
+Choice.__index = Choice
+
+
+function Choice.new(args)
+    local self = setmetatable(args, Choice)
+
+    self.align = self.align or 'center'
+    self.valign = self.valign or 'center'
+    self.cornerRadius = self.cornerRadius or core.theme.cornerRadius
+    self.color = self.color or core.theme.color
+    self.hovered = false
+    self.choices = self.choices or { "" }
+    self.nowrap = self.nowrap or #self.choices == 0
+    self.index = 1  -- by default
+
+    for i,choice in ipairs(self.choices) do
+        -- Expand shorthands
+        if type(choice) ~= 'table' then
+            choice = {
+                text = tostring(choice),
+                notranslate = type(choice) ~= 'string',
+                value = choice
+            }
+
+            self.choices[i] = choice
+        end
+        -- Mark default choice if needed
+        if choice.value == self.default then
+            self.index = i
+        end
+        -- Translate choice
+        if not (self.notranslate or choice.notranslate) then
+            choice.text = T(choice.text)
+        end
+    end
+    return self
+end
+
+function Choice:checkIndex()
+    if self.nowrap then
+        self.index = math.min(math.max(self.index, 1), #self.choices)
+    else
+        if self.index < 1 then
+            self.index = #self.choices
+        end
+        if self.index > #self.choices then
+            self.index = 1
+        end
+    end
+end
+
+function Choice:onActionInput(action)
+    local oldindex = self.index
+    local handled = false
+
+    -- Change choice
+    if action.left then
+        self.index = oldindex - 1
+        handled = true
+    end
+    if action.right then
+        self.index = oldindex + 1
+        handled = true
+    end
+    if not handled then
+        return false
+    end
+
+    -- Apply wrapping
+    self:checkIndex()
+
+    -- Fire event if necessary
+    if oldindex ~= self.index then
+        self:onChange(self.choices[self.index])
+    end
+    return true
+end
+
+function Choice:onPointerInput(px,py, clicked)
+    self:grabFocus()
+    if not clicked then
+        return
+    end
+
+    local mx = px - self.x
+    local oldindex = self.index
+
+    -- Test whether arrows are hit
+    -- NOTE: don't care about arrows being disabled, checkIndex() will fix that.
+    if mx <= self.h+2 then
+        self.index = self.index - 1
+    elseif mx >= self.w - self.h-2 then
+        self.index = self.index + 1
+    end
+
+    self:checkIndex()
+    if oldindex ~= self.index then
+        self:onChange(self.choices[self.index])
+    end
+end
+
+function Choice:draw()
+    local x,y,w,h = self.x,self.y,self.w,self.h
+    local font = self.font or love.graphics.getFont()
+    local c = self:colorForState()
+
+    core.drawBox(x,y,w,h, c, self.cornerRadius)
+
+    if self.ui.focused == self then
+        -- draw < and > arrows, desaturate color if arrow is disabled
+        local cc = self.color.hovered
+
+        love.graphics.setLineStyle('smooth')
+        love.graphics.setLineWidth(3)
+        love.graphics.setLineJoin('bevel')
+
+        local r, g, b = cc.fg[1], cc.fg[2], cc.fg[3]
+        local a = (self.nowrap and self.index == 1) and 0.4 or 1
+
+        love.graphics.setColor(r,g,b,a)
+        love.graphics.line(x+h*.8,y+h*.2, x+h*.5,y+h*.5, x+h*.8,y+h*.8)
+
+        a = (self.nowrap and self.index == #self.choices) and 0.4 or 1
+
+        love.graphics.setColor(r,g,b,a)
+        love.graphics.line(x+w-h*.8,y+h*.2, x+w-h*.5,y+h*.5, x+w-h*.8,y+h*.8)
+    end
+
+    -- draw text
+    local text = self.choices[self.index].text
+
+    y = y + core.verticalOffsetForAlign(self.valign, font, h)
+
+    love.graphics.setColor(c.fg)
+    love.graphics.setFont(font)
+    shadowtext.printf(text, x+h+2, y, w-2*(h + 2), self.align)
+end
+
+return Choice