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    Textfield y position

    gaboritalygaboritaly Member
    edited June 2012 in General questions
    Hi guys,
    Finally I can start learning Gideros .
    I started my first example, and I found a little strange thing.
    The Textfield doesn't appear in the red box.
    I watched in the Gideros tutorials,it uses the similar coordinates system to flash, and I didn't find in the documentation, if the Textfield has a different coordinate.
    Any object what I add with addChild, the player view in the correct position.
    Anybody know why happened this ?


    // CODE

    FirstButton = Core.class(Sprite)
    function FirstButton:init()

    local text = TextField.new(nil, "Change direction")
    local shape = Shape.new() -- create the shape

    shape:beginPath()
    shape:setLineStyle(1,0xddeecc,0.7)
    shape:setFillStyle(Shape.SOLID, 0xff0000, 0.5)
    shape:lineTo(0,0)
    shape:lineTo(text:getWidth()+10,0)
    shape:lineTo(text:getWidth()+10,text:getHeight()+10)
    shape:lineTo(0,text:getHeight()+10)
    shape:lineTo(0,0)
    shape:endPath()

    print(text:getY(0))

    self:addChild(shape)
    self:addChild(text)

    end

    local rotate_btn = FirstButton.new()
    local countNum = 1
    local orientations ={Application.PORTRAIT,Application.PORTRAIT_UPSIDE_DOWN,Application.LANDSCAPE_LEFT,Application.LANDSCAPE_RIGHT}

    local rotateScreen = function ()

    countNum = countNum + 1
    if countNum > #orientations then
    countNum = 1
    end
    application:setOrientation(orientations[countNum])

    end


    rotate_btn:addEventListener(Event.MOUSE_DOWN, rotateScreen)
    stage:addChild(rotate_btn)

    or

    Thanks a lot for any suggestion.
    NG
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    Comments

    • zvardinzvardin Member
      Hm, that does work differently than I'd expect, you can set the Y to the height of the textfield however. I'm guessing the coordinates are the point at which the font draws (the point always being at the bottom left).

      Also, just some small things you may want to look out for/find easier:
      Instead of doing the last shape:lineTo(0,0) you can do shape:closePath() and it will automatically draw a line to the originating point. I also usually start with shape:moveTo() instead of lineTo() for the first point (not sure if it makes a difference).

      And your event listener will fire whenever someone clicks anywhere on the screen right now. All sprites will receive any touch/mouse event, so you need to add a parameter to your rotateScreen function and test the point like so:
      local function rotateScreen(e)
   if self:hitTestPoint(e.x,e.y) then
      --your code
   end
end
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    • evsevs Member
      @gaboritaly

      Put this (where the print statement is) to compensate for the way that text is positioned
       
text:setPosition(5, shape:getHeight() / 2 + text:getHeight() / 2)

      cheers

      evs
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    • gaboritalygaboritaly Member
      I noticed in Gideros, all Font classes have the bottom left alignment.
      Thanks all, for the code optimization and for the good explanation.
      Have a nice day

      NG


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    • OZAppsOZApps Guru
      It is not Bottom Left Alignment, it is due to the way that fonts are handled in GiderosStudio, have a read on http://en.wikipedia.org/wiki/Baseline_(typography)
      It seems that it is bottom left.
      twitter: @ozapps | http://www.oz-apps.com | http://howto.oz-apps.com | http://reviewme.oz-apps.com
      Author of Learn Lua for iOS Game Development from Apress ( http://www.apress.com/9781430246626 )
      Cool Vizify Profile at https://www.vizify.com/oz-apps
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    • gaboritalygaboritaly Member
      For that I didn't understand why viewed the descent part of the letter.
      Thank you for clarify ;)
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    • atilimatilim Maintainer
      edited June 2012
      Hi,

      Also there is an undocumented function Sprite:getBounds(targetSprite). It returns the exact bounds as x, y, width and height which appears in another coordinate system (targetSprite's coordinate system).

      For example, you can use Sprite:getBounds function to get untransformed local bounds as:
      local x, y, width, height = sprite:getBounds(sprite)
      or get the bounds in stage's coordinate system as:
      local x, y, width, height = sprite:getBounds(stage)
      And here is an example that gets and draws the bounds of 2 text fields:
      -- example 1
do
    local text = TextField.new(nil, "ABCDEFG abcdefg")
    text:setPosition(20, 30)
    stage:addChild(text)
 
    local x, y, width, height = text:getBounds(text)
 
    local shape = Shape.new()
    shape:setLineStyle(1, 0x306090)
    shape:moveTo(x, y)
    shape:lineTo(x + width, y)
    shape:lineTo(x + width, y + height)
    shape:lineTo(x, y + height)
    shape:closePath()
    shape:endPath()
 
    text:addChild(shape)
end
 
 
-- example 2
do
    local text = TextField.new(nil, "Abg")
    text:setPosition(20, 200)
    text:setScale(16)
    stage:addChild(text)
 
    local x, y, width, height = text:getBounds(stage)
 
    local shape = Shape.new()
    shape:setLineStyle(1, 0x306090)
    shape:moveTo(x, y)
    shape:lineTo(x + width, y)
    shape:lineTo(x + width, y + height)
    shape:lineTo(x, y + height)
    shape:closePath()
    shape:endPath()
 
    stage:addChild(shape)
end
      The documentation of this function will be available with the next version.
      http://en.wikipedia.org/wiki/Cytorus
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    • chipster123chipster123 Member
      I could sure use this!
      http://www.kosidossapps.com
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    • gaboritalygaboritaly Member
      Thanks Atilim, for advanced notification !
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