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mLine 1:
Line 1: − + − + + + + + + Line 19:
Line 24: − + Line 36:
Line 41: + Line 47:
Line 53: − txt2 = "moving ball #"..trackedBall.id+ − trackedBall:move(x-trackedBall.r/2,y-trackedBall.r/2)+ − else+ − txt2 = "not moving anything" − for i,ball in ipairs(ballsTable) do − if math.abs(ball.x+ball.r/2-x) <= ball.r/1.8 and math.abs(ball.y+ball.r/2-y) <= ball.r/1.8 then − ball.isActive = true − trackedBall = ball − ball.isActive = false+ + + + + + + + + + + − end − end Line 71:
Line 80: − − ballsTable = {} − grabFlag = false − isGrabbing = false − txt2 = "not moving anything" +
line breaks
Simple lua code showing event handling, class creation, grabbing objects across the screen, cursor setting...<br />
Simple lua code showing event handling, class creation, grabbing objects across the screen, cursor setting...<br />
(Code by Adrien "Adriweb" Bertrand)
(Code by [[User:Adriweb|Adriweb]] )
<syntaxhighlight>Ball = class()
<syntaxhighlight>ballsTable = {}
isGrabbing = false
txt2 = "not moving anything"
Ball = class()
function Ball:init(x,y,r,color)
function Ball:init(x,y,r,color)
gc:fillArc(self.x,self.y,self.r,self.r,0,360)
gc:fillArc(self.x,self.y,self.r,self.r,0,360)
if self.isActive then
if self.isActive then
gc:setColorRGB(0)
gc:setColorRGB(0,0,0)
gc:drawArc(self.x,self.y,self.r,self.r,0,360)
gc:drawArc(self.x,self.y,self.r,self.r,0,360)
end
end
function on.mouseUp(x,y)
function on.mouseUp(x,y)
cursor.set("default")
isGrabbing = false
isGrabbing = false
platform.window:invalidate()
platform.window:invalidate()
function on.mouseMove(x,y)
function on.mouseMove(x,y)
if isGrabbing and (trackedBall and trackedBall.isActive) then
if isGrabbing and (trackedBall and trackedBall.isActive) then
cursor.set("drag grab")
txt2 = "moving ball #"..trackedBall.id
trackedBall:move(x-trackedBall.r/2,y-trackedBall.r/2)
else
else
txt2 = "not moving anything"
for i,ball in ipairs(ballsTable) do
ball.isActive = false
cursor.set("pointer")
if math.abs(ball.x+ball.r/2-x) <= ball.r/1.8 and math.abs(ball.y+ball.r/2-y) <= ball.r/1.8 then
ball.isActive = true
cursor.set("hand pointer")
trackedBall = ball
break
end
end
end
end
end
end
gc:drawString("Press Enter to create a Ball object", 2, 190, "top")
gc:drawString("Press Enter to create a Ball object", 2, 190, "top")
end
end
function on.enterKey()
function on.enterKey()
ballsTable[#ballsTable+1] = Ball(math.random(10,250), math.random(10,180), 15, {math.random(0,255),math.random(0,255),math.random(0,255)})
ballsTable[#ballsTable+1] = Ball(math.random(10,250), math.random(10,180), 15, {math.random(0,255),math.random(0,255),math.random(0,255)})
platform.window:invalidate()
end</syntaxhighlight>
end</syntaxhighlight>
