99 lines
3.6 KiB
Lua
99 lines
3.6 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 = {x,y}, min = {0,0}, max = {1,1}, step = (max-min)/20}, 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 = {
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w.info.min and w.info.min[1] or 0,
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w.info.min and w.info.min[2] or 0,
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}
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w.info.max = {
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w.info.max and w.info.max[1] or math.max(1, w.info.value[1]),
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w.info.max and w.info.max[2] or math.max(1, w.info.value[2]),
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}
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w.info.step = {
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w.info.step and w.info.step[1] or (w.info.max[1] - w.info.min[1]) / 20,
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w.info.step and w.info.step[2] or (w.info.max[2] - w.info.min[2]) / 20,
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}
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local fraction = {
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(w.info.value[1] - w.info.min[1]) / (w.info.max[1] - w.info.min[1]),
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(w.info.value[2] - w.info.min[2]) / (w.info.max[2] - w.info.min[2]),
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}
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local id = w.id or core.generateID()
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local pos, size = group.getRect(w.pos, w.size)
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mouse.updateWidget(id, pos, size, w.widgetHit)
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keyboard.makeCyclable(id)
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-- update value
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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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fraction = {
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math.min(1, math.max(0, (mouse.x - pos[1]) / size[1])),
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math.min(1, math.max(0, (mouse.y - pos[2]) / size[2])),
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}
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local v = {
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fraction[1] * (w.info.max[1] - w.info.min[1]) + w.info.min[1],
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fraction[2] * (w.info.max[2] - w.info.min[2]) + w.info.min[2],
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}
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if v[1] ~= w.info.value[1] or v[2] ~= w.info.value[2] 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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if keyboard.hasFocus(id) then
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if keyboard.key == 'down' then
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w.info.value[2] = math.min(w.info.max[2], w.info.value[2] + w.info.step[2])
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changed = true
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elseif keyboard.key == 'up' then
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w.info.value[2] = math.max(w.info.min[2], w.info.value[2] - w.info.step[2])
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changed = true
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end
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if keyboard.key == 'right' then
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w.info.value[1] = math.min(w.info.max[1], w.info.value[1] + w.info.step[1])
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changed = true
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elseif keyboard.key == 'left' then
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w.info.value[1] = math.max(w.info.min[1], w.info.value[1] - w.info.step[1])
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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.Slider2D,
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fraction, pos[1],pos[2], size[1],size[2])
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return changed
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end
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