130 lines
5.1 KiB
Lua
130 lines
5.1 KiB
Lua
local function Scrollbar(name)
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local base = Object(name)
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local objectType = "Scrollbar"
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base.width = 1
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base.height = 8
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base.bgColor = colors.lightGray
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base.fgColor = colors.gray
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base:setValue(1)
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base:setZIndex(2)
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local barType = "vertical"
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local symbol = " "
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local symbolColor = colors.black
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local bgSymbol = "\127"
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local maxValue = base.height
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local index = 1
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local symbolSize = 1
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local object = {
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getType = function(self)
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return objectType
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end;
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setSymbol = function(self, _symbol)
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symbol = _symbol:sub(1, 1)
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self:setVisualChanged()
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return self
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end;
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setSymbolSize = function(self, size)
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symbolSize = tonumber(size) or 1
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if (barType == "vertical") then
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self:setValue(index - 1 * (maxValue / (self.height - (symbolSize - 1))) - (maxValue / (self.height - (symbolSize - 1))))
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elseif (barType == "horizontal") then
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self:setValue(index - 1 * (maxValue / (self.width - (symbolSize - 1))) - (maxValue / (self.width - (symbolSize - 1))))
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end
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self:setVisualChanged()
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return self
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end;
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setMaxValue = function(self, val)
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maxValue = val
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return self
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end;
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setBackgroundSymbol = function(self, _bgSymbol)
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bgSymbol = string.sub(_bgSymbol, 1, 1)
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self:setVisualChanged()
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return self
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end;
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setSymbolColor = function(self, col)
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symbolColor = col
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self:setVisualChanged()
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return self
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end;
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setBarType = function(self, _typ)
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barType = _typ:lower()
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return self
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end;
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mouseHandler = function(self, event, button, x, y)
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if (base.mouseHandler(self, event, button, x, y)) then
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local obx, oby = self:getAbsolutePosition(self:getAnchorPosition())
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if (((event == "mouse_click") or (event == "mouse_drag")) and (button == 1))or(event=="monitor_touch") then
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if (barType == "horizontal") then
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for _index = 0, self.width do
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if (obx + _index == x) and (oby <= y) and (oby + self.height > y) then
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index = math.min(_index + 1, self.width - (symbolSize - 1))
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self:setValue(maxValue / self.width * (index))
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self:setVisualChanged()
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end
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end
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end
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if (barType == "vertical") then
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for _index = 0, self.height do
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if (oby + _index == y) and (obx <= x) and (obx + self.width > x) then
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index = math.min(_index + 1, self.height - (symbolSize - 1))
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self:setValue(maxValue / self.height * (index))
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self:setVisualChanged()
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end
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end
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end
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end
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if (event == "mouse_scroll") then
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index = index + button
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if (index < 1) then
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index = 1
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end
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index = math.min(index, (barType == "vertical" and self.height or self.width) - (symbolSize - 1))
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self:setValue(maxValue / (barType == "vertical" and self.height or self.width) * index)
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end
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return true
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end
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end;
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draw = function(self)
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if (base.draw(self)) then
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if (self.parent ~= nil) then
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local obx, oby = self:getAnchorPosition()
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if (barType == "horizontal") then
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self.parent:writeText(obx, oby, bgSymbol:rep(index - 1), self.bgColor, self.fgColor)
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self.parent:writeText(obx + index - 1, oby, symbol:rep(symbolSize), symbolColor, symbolColor)
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self.parent:writeText(obx + index + symbolSize - 1, oby, bgSymbol:rep(self.width - (index + symbolSize - 1)), self.bgColor, self.fgColor)
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end
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if (barType == "vertical") then
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for n = 0, self.height - 1 do
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if (index == n + 1) then
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for curIndexOffset = 0, math.min(symbolSize - 1, self.height) do
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self.parent:writeText(obx, oby + n + curIndexOffset, symbol, symbolColor, symbolColor)
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end
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else
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if (n + 1 < index) or (n + 1 > index - 1 + symbolSize) then
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self.parent:writeText(obx, oby + n, bgSymbol, self.bgColor, self.fgColor)
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end
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end
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end
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end
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end
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self:setVisualChanged(false)
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end
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end;
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}
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return setmetatable(object, base)
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end |