Checkbox and table

loves_oi · September 2012

I want to build a table which holds : id , name , age .
And checkboxes should be exist in each line. For example , i will select two lines and then clicked submit button. Then it will print these two lines. But how can i do it? How can i do checkboxes ? Is there any example?
Moreover, in order to make a good-looking table , do i have to do it with puting symetric lines manually? Or is there any easy way ?
Thanks in advance...

talis · September 2012

So easy way is to do with a button class. Just when you press it your image should be persistent not like a normal button. Here is an implementation of persistent image with a normal button class.

function Switch:init(button1, button2)
	self.button1 = button1
	self.button2 = button2
	self:addChild(button1)
    self.state = false
    self.button1:addEventListener("click", self.changeState, self)
    self.button2:addEventListener("click", self.changeState, self)
    self.onChange = Event.new("onChange")
end
 
function Switch:changeState()
    self.state = not self.state
	if self.state then
		if self:contains(self.button1) then
			self:removeChild(self.button1)
		end
		self:addChild(self.button2)
	else
		if self:contains(self.button2) then
			self:removeChild(self.button2)
		end
		self:addChild(self.button1)
	end
    self.onChange.state = self.state
    self:dispatchEvent(self.onChange)
end
 
function Switch:getState()
      return self.state
end
 
local checkboxon = Button.new(Bitmap.new(Texture.new("checkbox_checked_image")), Bitmap.new(Texture.new("checkbox_not_checked_image")))
local checkboxoff= Button.new(Bitmap.new(Texture.new("checkbox_not_checked_image")), Bitmap.new(Texture.new("checkbox_checked_image")))
 
switch = Switch.new(checkboxon , checkboxoff)
 
switch:addEventListener("onChange", function(e)
	print(e.state)
 
    if e.state then
       --not checked state do your job inside here
 
    else
      --checked state, do your job inside here
    end
end)

Scouser · September 2012

Take a look at my Simple Options Screen. It has checkboxes.

ar2rsawseen · September 2012

I think there was an example somewhere.
http://www.giderosmobile.com/forum/discussion/1456/button-onoff-state

talis · September 2012

actually i think this code i posted from one of your examples @ar2rsawseen

ar2rsawseen · September 2012

@talis
oops, just don't let @techdojo see this

)
http://www.giderosmobile.com/forum/discussion/1598/2-players-game-via-bluetooth-in-gideros#Item_10

loves_oi · September 2012

@talis
i tried to compile the code in order to see what it looks like.
But i'm taking error:
switch.lua:6: bad argument #1 to 'addChild' (Sprite expected, got nil)
stack traceback:

What should i do?
switch.lua:

Switch = Core.class(Sprite)
 
function Switch:init(button1, button2)
	self.button1 = button1
	self.button2 = button2
	self:addChild(button1)
    self.state = false
    self.button1:addEventListener("click", self.changeState, self)
    self.button2:addEventListener("click", self.changeState, self)
    self.onChange = Event.new("onChange")
end
 
function Switch:changeState()
    self.state = not self.state
	if self.state then
		if self:contains(self.button1) then
			self:removeChild(self.button1)
		end
		self:addChild(self.button2)
	else
		if self:contains(self.button2) then
			self:removeChild(self.button2)
		end
		self:addChild(self.button1)
	end
    self.onChange.state = self.state
    self:dispatchEvent(self.onChange)
end
 
function Switch:getState()
      return self.state
end
 
local checkboxon = Button.new(Bitmap.new(Texture.new("check_tick.png")), Bitmap.new(Texture.new("check_box.png")))
local checkboxoff= Button.new(Bitmap.new(Texture.new("check_box.png")), Bitmap.new(Texture.new("check_tick.png")))
 
switch = Switch.new(checkboxon , checkboxoff)
 
switch:addEventListener("onChange", function(e)
	print(e.state)
 
    if e.state then
       --not checked state do your job inside here
 
    else
      --checked state, do your job inside here
    end
end)

main.lua

 
 
-- create the up and down sprites for the button
local upp = Bitmap.new(Texture.new("button_up.png"))
local down = Bitmap.new(Texture.new("button_down.png"))
 
-- create the button
local button1 = Button.new(upp, down)
 
-- register to "click" event
local click = 0
button1:addEventListener("click", 
	function() 
		print "Hello World"
	end)
 
button1:setPosition(40, 100)
--stage:addChild(button1)
-----------------------------------------------------------------------------
-- create the button
local button2 = Button.new(upp, down)
 
-- register to "click" event
local click = 0
button2:addEventListener("click", 
	function() 
		print "Hello World2"
	end)
 
button2:setPosition(40, 100)
--stage:addChild(button2)
 
local switch = Switch.new()
switch:changeState(button1, button2) 
stage:addChild(switch)

techdojo · September 2012

HA - So it's not just me who has need of the excessive face palm.

Even monkeys fall out of trees!

Scouser · September 2012

@loves_oi: The problem is in your main.lua. on the line

local switch = Switch.new()
switch:changeState(button1, button2)

should be

local switch = Switch.new(button1, button2)
switch:changeState()

maybe??

OZApps · September 2012

@loves_oi, actually the error is exactly as what @scouser has spotted.

The function init takes two parameters that are set where as the changeState function takes no parameters, but you are passing no parameters to init and passing the params to changeState.

The error is on line #6, which is

self:addChild(button1)

since you have passed nothing, button1 is nil and hence the error. You could modify your functions to check that if New is called without any parameters, you could avoid setting the params and adding the child to the stage and modify the changeState to accept two parameters that can set the button1 and button2 as required.

loves_oi · September 2012

After running , first screen is coming .After clicking ,second (blank) screen is coming. What is wrong with this code ? I attached the zip file of the source code example.zip.what should happen when it works correctly?
Thanks in advance.

loves_oi · September 2012

@talis , what should happen when it works correctly? How can i do it?

Howdy, Stranger!

Categories

In this Discussion

Top Posters

Checkbox and table

Comments

Howdy, Stranger!

Quick Links

Categories

In this Discussion

Top Posters

Checkbox and table

Comments