# Class Timeline

java.lang.Object
com.codename1.ui.Image
com.codename1.ui.animations.Timeline

All Implemented Interfaces:
  `Animation, ActionSource, Painter`

public final class Timeline extends Image implements Animation, Painter
A timeline represents the motions of animation objects

- ## Method Summary

  Modifier and Type
  Method
  Description
  `void`
  `addAnimation(AnimationObject o)`
  Adds an animation object to show using this timeline
  `boolean`
  `animate()`
  Advances this image's animation state, if it is animated.
  `static Timeline`
  `createTimeline(int duration, AnimationObject[] animations, Dimension size)`
  Create a new timeline animation
  `protected void`
  `drawImage(Graphics g, Object nativeGraphics, int x, int y)`
  Callback invoked internally by Codename One to draw the image/frame onto the display.
  `protected void`
  `drawImage(Graphics g, Object nativeGraphics, int x, int y, int w, int h)`
  Callback invoked internally by Codename One to draw the image/frame onto the display.
  `AnimationObject`
  `getAnimation(int i)`
  Returns the animation object in the given offset
  `AnimationObject`
  `getAnimationAt(int x, int y)`
  Returns the animation object at the given X/Y coordinate in the timeline for the current frame.
  `int`
  `getAnimationCount()`
  Returns the number of animation objects in this timeline
  `int`
  `getAnimationDelay()`
  Inidicates the minimal delay between animation frames allowing the CPU to rest.
  `int`
  `getDuration()`
  Returns the duration of the entire timeline in milliseconds
  `int`
  `getHeight()`
  Returns the height of the image
  `int[]`
  `getRGB()`
  Returns the content of this image as a newly created ARGB array.
  `int[]`
  `getRGBCached()`
  Returns the content of this image as a newly created ARGB array or a cached instance if possible.
  `Dimension`
  `getSize()`
  Returns the pixel based unscaled dimentions of this timeline
  `int`
  `getTime()`
  Returns the time of the timeline
  `int`
  `getWidth()`
  Returns the width of the image
  `boolean`
  `isAnimation()`
  Returns true if this is an animated image
  `boolean`
  `isLoop()`
  Indicates if the image should loop
  `boolean`
  `isPause()`
  Returns true when the timeline is paused
  `void`
  `lock()`
  This callback indicates that a component pointing at this image is initialized, this allows an image to make performance sensitive considerations e.g.
  `void`
  `paint(Graphics g)`
  Draws the animation, within a component the standard paint method would be invoked since it bares the exact same signature.
  `void`
  `paint(Graphics g, Rectangle rect)`
  Draws inside the given rectangle clipping area.
  `boolean`
  `requiresDrawImage()`
  New label optimizations don't invoke drawImage and instead just pass the native image directly to the underlying renderer.
  `Image`
  `scaled(int width, int height)`
  Returns a scaled version of this image image using the given width and height, this is a fast algorithm that preserves translucent information.
  `void`
  `setAnimationDelay(int animationDelay)`
  Inidicates the minimal delay between animation frames allowing the CPU to rest.
  `void`
  `setLoop(boolean loop)`
  Indicates if the image should loop
  `void`
  `setPause(boolean pause)`
  Indicate that the application is paused
  `void`
  `setTime(int time)`
  Set the time of the timeline
  `void`
  `unlock()`
  This callback indicates that a component pointing at this image is now deinitilized This method may be invoked multiple times.

  ### Methods inherited from class Image

  `addActionListener, applyMask, applyMask, applyMaskAutoScale, asyncLock, createImage, createImage, createImage, createImage, createImage, createImage, createImage, createIndexed, createMask, createSVG, dispose, exifRotation, exifRotation, exifRotation, fill, fireChangedEvent, flipHorizontally, flipVertically, getExifOrientationTag, getExifOrientationTag, getGraphics, getImage, getImageName, getRGB, getSVGDocument, isAlphaMutableImageSupported, isJPEG, isLocked, isOpaque, isPNG, isSVG, isSVGSupported, mirror, modifyAlpha, modifyAlpha, modifyAlphaWithTranslucency, removeActionListener, rotate, rotate180Degrees, rotate270Degrees, rotate90Degrees, scale, scaledHeight, scaledLargerRatio, scaledSmallerRatio, scaledWidth, setImageName, subImage, toRGB`

  ### Methods inherited from class Object

  `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- ## Method Details

  - ### createTimeline

    public static Timeline createTimeline(int duration, AnimationObject[] animations, Dimension size)

    Create a new timeline animation

    ###### Parameters

    - `duration`: the duration of the animation in milliseconds

    - `animations`: the animation objects that are part of this timeline

    - `size`: @param size size of the animation in virtual pixels, if the size differs the animation would be scaled on the fly

    ###### Returns

    the new timeline instance

  - ### lock

    public void lock()
    This callback indicates that a component pointing at this image is initialized, this allows an image to make performance sensitive considerations e.g. an encoded image might choose to cache itself in RAM. This method may be invoked multiple times.
    Overrides:
      `lock` in class `Image`

  - ### unlock

    public void unlock()
    This callback indicates that a component pointing at this image is now deinitilized This method may be invoked multiple times.
    Overrides:
      `unlock` in class `Image`

  - ### getRGB

    public int[] getRGB()

    Returns the content of this image as a newly created ARGB array.

    ###### Returns

    new array instance containing the ARGB data within this image

    Overrides:
      `getRGB` in class `Image`

  - ### getRGBCached

    public int[] getRGBCached()

    Returns the content of this image as a newly created ARGB array or a cached instance if possible. Note that cached instances may be garbage collected.

    ###### Returns

    array instance containing the ARGB data within this image

    Overrides:
      `getRGBCached` in class `Image`

  - ### addAnimation

    public void addAnimation(AnimationObject o)

    Adds an animation object to show using this timeline

    ###### Parameters

    - `o`: animation object featured in this timeline

  - ### getTime

    public int getTime()

    Returns the time of the timeline

    ###### Returns

    the time of the timeline in ms starting from 0

  - ### setTime

    public void setTime(int time)

    Set the time of the timeline

    ###### Parameters

    - `time`: the time of the timeline in ms starting from 0

  - ### isAnimation

    public boolean isAnimation()

    Returns true if this is an animated image

    ###### Returns

    true if this image represents an animation

    Overrides:
      `isAnimation` in class `Image`

  - ### animate

    public boolean animate()

    Advances this image's animation state, if it is animated.

    ###### Returns

    `true` if the animation state changed.

    Specified by:
      `animate` in interface `Animation`
    Overrides:
      `animate` in class `Image`

  - ### paint

    public void paint(Graphics g)

    Draws the animation, within a component the standard paint method would be invoked since it bares the exact same signature.

    ###### Parameters

    - `g`: graphics context
    Specified by:
      `paint` in interface `Animation`

  - ### paint

    public void paint(Graphics g, Rectangle rect)

    Draws inside the given rectangle clipping area.

    ###### Parameters

    - `g`: the `Graphics` object

    - `rect`: the given rectangle cliping area

    Specified by:
      `paint` in interface `Painter`

  - ### getAnimationDelay

    public int getAnimationDelay()

    Inidicates the minimal delay between animation frames allowing the CPU to rest. Increase this number to increase general device performance, decrease it to speed the animation.

    ###### Returns

    the animationDelay

  - ### setAnimationDelay

    public void setAnimationDelay(int animationDelay)

    Inidicates the minimal delay between animation frames allowing the CPU to rest. Increase this number to increase general device performance, decrease it to speed the animation.

    ###### Parameters

    - `animationDelay`: the animationDelay to set

  - ### drawImage

    protected void drawImage(Graphics g, Object nativeGraphics, int x, int y)

    Callback invoked internally by Codename One to draw the image/frame onto the display. Image subclasses can override this method to perform drawing of custom image types.

    ###### Parameters

    - `g`: the graphics object

    - `nativeGraphics`: the underlying native graphics which might be essential for some image types

    - `x`: the x coordinate

    - `y`: the y coordinate

    Overrides:
      `drawImage` in class `Image`

  - ### drawImage

    protected void drawImage(Graphics g, Object nativeGraphics, int x, int y, int w, int h)

    Callback invoked internally by Codename One to draw the image/frame onto the display. Image subclasses can override this method to perform drawing of custom image types.

    ###### Parameters

    - `g`: the graphics object

    - `nativeGraphics`: the underlying native graphics which might be essential for some image types

    - `x`: the x coordinate

    - `y`: the y coordinate

    - `w`: the width to occupy

    - `h`: the height to occupy

    Overrides:
      `drawImage` in class `Image`

  - ### getWidth

    public int getWidth()

    Returns the width of the image

    ###### Returns

    the width of the image

    Overrides:
      `getWidth` in class `Image`

  - ### getHeight

    public int getHeight()

    Returns the height of the image

    ###### Returns

    the height of the image

    Overrides:
      `getHeight` in class `Image`

  - ### scaled

    public Image scaled(int width, int height)

    Returns a scaled version of this image image using the given width and height, this is a fast algorithm that preserves translucent information. The method accepts -1 to preserve aspect ratio in the given axis.

    ###### Parameters

    - `width`: width for the scaling

    - `height`: height of the scaled image

    ###### Returns

    new image instance scaled to the given height and width

    Overrides:
      `scaled` in class `Image`

  - ### isPause

    public boolean isPause()

    Returns true when the timeline is paused

    ###### Returns

    the pause state

  - ### setPause

    public void setPause(boolean pause)

    Indicate that the application is paused

    ###### Parameters

    - `pause`: true to pause the application

  - ### getDuration

    public int getDuration()

    Returns the duration of the entire timeline in milliseconds

    ###### Returns

    the duration

  - ### getSize

    public Dimension getSize()

    Returns the pixel based unscaled dimentions of this timeline

    ###### Returns

    the size

  - ### getAnimationCount

    public int getAnimationCount()

    Returns the number of animation objects in this timeline

    ###### Returns

    the number of animations

  - ### getAnimation

    public AnimationObject getAnimation(int i)

    Returns the animation object in the given offset

    ###### Parameters

    - `i`: the offset of the animation

    ###### Returns

    the animation object

  - ### getAnimationAt

    public AnimationObject getAnimationAt(int x, int y)

    Returns the animation object at the given X/Y coordinate in the timeline for the current frame. This allows functionality such as responding to pointer events on the resource editor. Notice that this method is not efficient since it tests the pixel opacity which is a pretty expensive operation...

    ###### Parameters

    - `x`: the x location in the timeline

    - `y`: the y location in the timeline

    ###### Returns

    an animation object or null if no animation object is at that position.

  - ### isLoop

    public boolean isLoop()

    Indicates if the image should loop

    ###### Returns

    the loop

  - ### setLoop

    public void setLoop(boolean loop)

    Indicates if the image should loop

    ###### Parameters

    - `loop`: the loop to set

  - ### requiresDrawImage

    public boolean requiresDrawImage()

    New label optimizations don't invoke drawImage and instead just pass the native image directly to the underlying renderer. This is problematic for some image types specifically timeline & FontImage and this method allows these classes to indicate that they need that legacy behavior of calling drawImage.

    ###### Returns

    true if a drawImage call is a required

    Overrides:
      `requiresDrawImage` in class `Image`