gideros button example problem

homeless

I cant add multiple button instantiations. It shows only the last one. There is supposed to be 4 buttons, but there is only one. This code works with textures but not with Button. Am I missing something?

local label = TextField.new(nil, "Clicked 0 time(s)")
label:setPosition(120, 480)
stage:addChild(label)

-- create the up and down sprites for the button
texUp = Texture.new("button_up_small.png")
up = Bitmap.new(texUp)
texDown = Texture.new("button_down_small.png")
down = Bitmap.new(texDown)

-- create the buttons
posx = 5
posy = 5
cellHeight = texUp:getHeight()
cellWidth = texUp:getWidth()
for i = 1, 2 do
for j = 1, 2 do
button = Button.new(up, down)
button:setPosition(posx, posy)
posx = posx + cellWidth + 5
-- register to "click" event
local click = 0
button:addEventListener("click",
function()
click = click + 1
label:setText("Clicked " .. click .. " time(s)")
end)
stage:addChild(button)
end
posy = posy + cellHeight + 5
posx = 5
end

plamen

-- create the buttons
posx = 5
posy = 5
cellHeight = texUp:getHeight()
cellWidth = texUp:getWidth()

button={}

for i = 1,4 do
button[i] = Button.new(up, down)
button[i]:setPosition(posx, posy)
posx = posx + cellWidth + 5
-- register to "click" event
local click = 0
button[i]:addEventListener("click",
function()
click = click + 1
label:setText("Clicked " .. click .. " time(s)")
end)
stage:addChild(button)
end
posy = posy + cellHeight + 5
posx = 5
end

homeless

Tha

-- create the buttons

button={}

for i = 1,4 do
button[i] = Button.new(up, down)
button[i]:setPosition(posx, posy)
posx = posx + cellWidth + 5
stage:addChild(button)
posy = posy + cellHeight + 5
posx = 5
end

button={} -- I have already tried array, but nothing has changed.
stage:addChild(button) -- here it should be button[i], i guess

The code in your reply has compile errors. Thank you though. I guess there is something wrong with the Button object.

hgvyas123

try this

--[[   This example demonstrates a generic Button class   This code is MIT licensed, see <a href="http://www.opensource.org/licenses/mit-license.php" rel="nofollow">http://www.opensource.org/licenses/mit-license.php</a> (C) 2010 - 2011 Gideros Mobile   ]]   -- create a label to show number of clicks local label = TextField.new(nil, "Clicked 0 time(s)") label:setPosition(120, 240) stage:addChild(label)   local buttons = {} for i=1,4 do -- create the up and down sprites for the button local up = Bitmap.new(Texture.new("button_up.png")) local down = Bitmap.new(Texture.new("button_down.png"))   -- create the button buttons[i] = Button.new(up, down)   -- register to "click" event local click = 0 buttons[i]:addEventListener("click", function() click = click + 1 label:setText("Clicked " .. click .. " time(s)") end)   buttons[i]:setPosition(40, 150*i) stage:addChild(buttons[i]) end

homeless

Thank you, your code is working. But I dont understant why it works. Can you explain a little? Why does it make a difference that writing a local texture or not.

try this

--[[   This example demonstrates a generic Button class   This code is MIT licensed, see <a href="http://www.opensource.org/licenses/mit-license.php" rel="nofollow">http://www.opensource.org/licenses/mit-license.php</a> (C) 2010 - 2011 Gideros Mobile   ]]   -- create a label to show number of clicks local label = TextField.new(nil, "Clicked 0 time(s)") label:setPosition(120, 240) stage:addChild(label)   local buttons = {} for i=1,4 do -- create the up and down sprites for the button local up = Bitmap.new(Texture.new("button_up.png")) local down = Bitmap.new(Texture.new("button_down.png"))   -- create the button buttons[i] = Button.new(up, down)   -- register to "click" event local click = 0 buttons[i]:addEventListener("click", function() click = click + 1 label:setText("Clicked " .. click .. " time(s)") end)   buttons[i]:setPosition(40, 150*i) stage:addChild(buttons[i]) end

hgvyas123

ok, there is no problem with preloading the textures but preloading the bitmap is the problem see the below code

local label = TextField.new(nil, "Clicked 0 time(s)") label:setPosition(120, 480) stage:addChild(label)   -- create the up and down sprites for the button texUp = Texture.new("button_up.png")   texDown = Texture.new("button_down.png")     -- create the buttons posx = 5 posy = 5 cellHeight = texUp:getHeight() cellWidth = texUp:getWidth() for i = 1, 2 do for j = 1, 2 do up = Bitmap.new(texUp) down = Bitmap.new(texDown) button = Button.new(up, down) button:setPosition(posx, posy) posx = posx + cellWidth + 5 -- register to "click" event local click = 0 button:addEventListener("click", function() click = click + 1 label:setText("Clicked " .. click .. " time(s)") end) stage:addChild(button) end posy = posy + cellHeight + 5 posx = 5 end

it will work fine the problem was you had created

up = Bitmap.new(texUp)
down = Bitmap.new(texDown)

out side of the for loops and then you are adding it to 4 different parents [in our case Button.new()] and because of this all the problems occured as any sprite should have only one parent when you try to add it to different parent it will first removed from the previous parent and then adding in new parent

i hope it will help

hgvyas123

also i recommend to use array and store all four buttons in that array else you will loose the access of first 3 buttons and only fourth button can be accessible due to the all of them have same name or id or whatever