79 lines
3 KiB
Lua
79 lines
3 KiB
Lua
--[[
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Copyright (c) 2012 Matthias Richter
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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Except as contained in this notice, the name(s) of the above copyright holders
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shall not be used in advertising or otherwise to promote the sale, use or
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other dealings in this Software without prior written authorization.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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]]--
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local BASE = (...):match("(.-)[^%.]+$")
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local core = require(BASE .. 'core')
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local group = require(BASE .. 'group')
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local mouse = require(BASE .. 'mouse')
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local keyboard = require(BASE .. 'keyboard')
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-- {info = {value = v, min = 0, max = 1, step = (max-min)/20}, vertical = boolean, pos = {x, y}, size={w, h}, widgetHit=widgetHit, draw=draw}
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return function(w)
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assert(type(w) == 'table' and type(w.info) == "table" and w.info.value, "Invalid argument.")
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w.info.min = w.info.min or 0
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w.info.max = w.info.max or math.max(w.info.value, 1)
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w.info.step = w.info.step or (w.info.max - w.info.min) / 20
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local fraction = (w.info.value - w.info.min) / (w.info.max - w.info.min)
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local id = core.generateID()
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local pos, size = group.getRect(w.pos, w.info.size)
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mouse.updateWidget(id, pos, size, w.widgetHit)
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keyboard.makeCyclable(id)
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-- mouse update
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local changed = false
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if mouse.isActive(id) then
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keyboard.setFocus(id)
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if w.vertical then
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fraction = math.min(1, math.max(0, (pos[2] - mouse.y + size[2]) / size[2]))
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else
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fraction = math.min(1, math.max(0, (mouse.x - pos[1]) / size[1]))
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end
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local v = fraction * (w.info.max - w.info.min) + w.info.min
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if v ~= w.info.value then
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w.info.value = v
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changed = true
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end
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end
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-- keyboard update
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if keyboard.hasFocus(id) then
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local keys = w.vertical and {'up', 'down'} or {'right', 'left'}
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if keyboard.key == keys[1] then
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w.info.value = math.min(w.info.max, w.info.value + w.info.step)
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changed = true
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elseif keyboard.key == keys[2] then
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w.info.value = math.max(w.info.min, w.info.value - w.info.step)
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changed = true
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end
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end
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core.registerDraw(id, w.draw or core.style.Slider,
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fraction, w.vertical, pos[1],pos[2], size[1],size[2])
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return changed
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end
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