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lineoperations.lua
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lineoperations.lua
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LineOperations = {}
LineOperations.__index = LineOperations
setmetatable(LineOperations, {
__index = Operations,
__call = function (o, ...)
local self = setmetatable({}, o)
self:_init(...)
return self
end,
})
function LineOperations:_init(id)
Operations._init(self, id)
self.lastPoint = nil
self.lastLine = nil
self.length = nil
self.line_id = ID():id()
event.register('point', self)
message("Click on first point")
end
function LineOperations:onEvent(eventName, ...)
if(Operations.forMe(self) == false) then
return
end
if(eventName == "point") then
self:newPoint(...)
elseif(eventName == "mouseMove") then
self:createTempLine(...)
elseif(eventName == "number") then
self.length = ...
end
end
function LineOperations:newPoint(point)
if(self.lastPoint ~= nil) then
active_widget():tempEntities():removeEntity(self.lastLine)
local b = Builder(active_widget():document())
local l = self:createLine(self.lastPoint, point)
b:append(l)
b:execute()
event.delete('mouseMove', self)
event.delete('number', self)
event.delete('point', self)
else
self.lastPoint = point
self.lastLine = self:createLine(point, point)
active_widget():tempEntities():addEntity(self.lastLine)
event.register('mouseMove', self)
event.register('number', self)
message("Click on second point or enter line length")
end
end
function LineOperations:createTempLine(point)
active_widget():tempEntities():removeEntity(self.lastLine)
self.lastLine = self:createLine(self.lastPoint, point)
active_widget():tempEntities():addEntity(self.lastLine)
end
function LineOperations:createLine(p1, p2)
local d = active_widget():document()
local layer = d:layerByName("0")
local l
if(self.length == nil) then
l = Line(p1, p2, layer)
else
local angle = p1:angleTo(p2)
local relativeCoordinate = Coordinate._fromAngle(angle):mulDouble(self.length)
l = Line(p1, p1:add(relativeCoordinate), layer)
end
l:setId(self.line_id)
return l
end