CPListBoxSprite

org.cosplay.CPListBoxSprite

class CPListBoxSprite(id: String, x: Int, y: Int, z: Int, model: CPListBoxModel, width: Int, height: Int, onKey: (CPSceneObjectContext, CPListBoxModel, CPKeyboardKey) => Unit, selSkin: (Int, CPPixel) => CPPixel, collidable: Boolean, shaders: Seq[CPShader], tags: Set[String]) extends CPDynamicSprite

A sprite that provide classic list box selector. It supports single selection over a list of values. This sprite uses an instance of CPListBoxModel to govern its operation. One needs to provide the model instance and onKey function to update the model based on the keyboard events.

Note that this sprite will automatically process KEY_LEFT and KEY_RIGHT keys to adjust the viewport of the listbox when the content of the model does not fit the dimensions of the sprite. These keys will still be passed to onKey() function call.

UI Framework

Although CosPlay does not define an opinionated UI framework, several sprites and supporting classes are often used for constructing UI element on the screen. These include:

You can can also look at the following UI-related examples:

org.cosplay.examples.listbox.CPListBoxExample
org.cosplay.examples.dialog.CPDialogExample
org.cosplay.examples.layout.CPLayoutExample
org.cosplay.examples.textinput.CPTextInputExample

Value parameters

collidable: Whether or not this sprite provides collision shape.
height: Height of the sprite.
id: ID of this scene object.
model: List box model to use.
onKey: A function that is called on each frame if a keyboard key was pressed. It takes scene object context, model and the pressed keyboard key. This function should manipulate the model instance passed into this constructor to update model state for given keyboard input. These model changes will then be rendered by this sprite.
selSkin: Skinning function for the currently selected row. It takes relative X-coordinate and current pixel return a new skinned pixel for that location.
shaders: Optional sequence of shaders for this sprite.
tags: Optional set of organizational or grouping tags.
width: Width of the sprite.
x: Initial X-coordinate of the top-left corner of the sprite. Default value is zero.
y: Initial Y-coordinate of the top-left corner of the sprite. Default value is zero.
z: Initial Z-index at which to render the sprite. Default value is zero.

Attributes

See also: CPListBoxModel
Example: See CPListBoxExample class for the example of using this sprite.
Source: CPListBoxSprite.scala
Graph
Supertypes: class CPDynamicSprite

class CPSceneObject

trait CPLifecycle

class CPGameObject

class Object

trait Matchable

class Any
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Members list

Value members

Concrete methods

Gets current dimension (width and height) of this object.

Attributes

See also: getWidth

getHeight

getRect
Definition Classes: CPSceneObject
Source: CPListBoxSprite.scala

Called to render this scene object. Only visible and in camera frame objects will receive this callback. This callback is called on scene object after all scene objects received update and monitor callbacks. Note that unlike update and monitor callbacks and shaders that are called for all scene objects on each frame, this callback is only called for scene objects that are visible and, at least partially, in camera frame. The order in which scene objects are called is undefined.

Note that generally this callback should not modify scene object state (which should be done in either update or monitor callbacks.

Default implementation is no-op.

Value parameters

ctx: Frame context. This context provides bulk of functionality that a scene object can do in a game, e.g. interact with other scene objects, check collisions, read input events and manage input focus, add or remove scene objects, add new and switch between scenes, etc.

Attributes

See also: update

monitor

isVisible
Definition Classes: CPSceneObject
Source: CPListBoxSprite.scala

Called to update the internal state of this scene object. This callback is called each frame on every object in the scene and it is called before any render callback. Note that all scene object will receive this callback before first render callback. The order in which scene objects are called is undefined.

Default implementation is no-op. No rendering should be done in this callback.

Value parameters

ctx: Frame context. This context provides bulk of functionality that a scene object can do in a game, e.g. interact with other scene objects, check collisions, read input events and manage input focus, add or remove scene objects, add new and switch between scenes, etc.

Attributes

See also: render

monitor

isVisible
Definition Classes: CPSceneObject
Source: CPListBoxSprite.scala

Inherited methods

Compares the receiver object (this) with the argument object (that) for equivalence.

Any implementation of this method should be an equivalence relation:

It is reflexive: for any instance x of type Any, x.equals(x) should return true.
It is symmetric: for any instances x and y of type Any, x.equals(y) should return true if and only if y.equals(x) returns true.
It is transitive: for any instances x, y, and z of type Any if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.

If you override this method, you should verify that your implementation remains an equivalence relation. Additionally, when overriding this method it is usually necessary to override hashCode to ensure that objects which are "equal" (o1.equals(o2) returns true) hash to the same scala.Int. (o1.hashCode.equals(o2.hashCode)).

Value parameters

that: the object to compare against this object for equality.

Attributes

Returns: true if the receiver object is equivalent to the argument; false otherwise.
Definition Classes: CPGameObject -> Any
Inherited from:: CPGameObject
Source: CPGameObject.scala

Gets optional collision shape or hit box for this sprite.

Attributes

Definition Classes: CPDynamicSprite -> CPSceneObject
Inherited from:: CPDynamicSprite
Source: CPDynamicSprite.scala

Gets current height of this object.

Attributes

See also: getWidth

getDim
Inherited from:: CPSceneObject
Source: CPSceneObject.scala

Gets unique ID of this game object.

Attributes

Inherited from:: CPGameObject
Source: CPGameObject.scala

Gets rectangular shape of this sprite. It is basically a combination of its top-left corner XY-coordinate and sprite's dimension.

Attributes

See also: getX

getY

getDim
Inherited from:: CPSceneObject
Source: CPSceneObject.scala

Gets the optional list of shaders attached to this scene object. By default, returns an empty list. Note that shaders are called regardless of whether the object visible, in camera frame or invisible.

Attributes

Definition Classes: CPDynamicSprite -> CPSceneObject
Inherited from:: CPDynamicSprite
Source: CPDynamicSprite.scala

Gets current lifecycle state.

Attributes

Inherited from:: CPLifecycle
Source: CPLifecycle.scala

Gets optional set of organizational tags. Note that by default the set of tags is empty.

Attributes

See also: CPSceneObjectContext.getObjectsForTags
Inherited from:: CPGameObject
Source: CPGameObject.scala

Gets current width of this object.

Attributes

See also: getHeight

getDim
Inherited from:: CPSceneObject
Source: CPSceneObject.scala

Gets current X-coordinate of this object within dimensions of its scene. Note that returned value is allowed to be outside scene's dimension (e.g. negative value). In such cases, the clipping of the scene rendering will result in showing only portion or none of the object.

Attributes

Definition Classes: CPDynamicSprite -> CPSceneObject
Inherited from:: CPDynamicSprite
Source: CPDynamicSprite.scala

Gets last X-coordinate which is

getX + getWidth - 1

. Note the value when the width is zero.

Attributes

Returns: Last X-coordinate for this sprite.
Inherited from:: CPSceneObject
Source: CPSceneObject.scala

Gets current Y-coordinate of this object within dimensions of its scene. Note that returned value is allowed to be outside scene's dimension (e.g. negative value). In such cases, the clipping of the scene rendering will result in showing only portion or none of the object.

Attributes

Definition Classes: CPDynamicSprite -> CPSceneObject
Inherited from:: CPDynamicSprite
Source: CPDynamicSprite.scala

Gets last Y-coordinate which is

getY + getHeight - 1

. Note the value when the height is zero.

Attributes

Returns: Last Y-coordinate for this sprite.
Inherited from:: CPSceneObject
Source: CPSceneObject.scala

Gets Z-index or order to use in rendering of this object. A pixel with higher Z-index visually overrides the overlapping pixel in the same XY-coordinate with equal or smaller Z-index.

Attributes

Definition Classes: CPDynamicSprite -> CPSceneObject
Inherited from:: CPDynamicSprite
Source: CPDynamicSprite.scala

Shortcut method for hiding this object. Note that by default all scene objects are visible. Note also that this change happens immediately in the same frame. If you want this to happen in the next frame only you need to use CPSceneObjectContext.runNextFrame.

Attributes

See also: setVisible

CPSceneObjectContext.runNextFrame

CPSceneObjectContext.runLater
Inherited from:: CPSceneObject
Source: CPSceneObject.scala

Increments current X-coordinate by given value.

Value parameters

d: A value (negative, zero or positive) to increment X-coordinate by.

Attributes

Inherited from:: CPDynamicSprite
Source: CPDynamicSprite.scala

Increments current Y-coordinate by given value.

Value parameters

d: A value (negative, zero or positive) to increment Y-coordinate by.

Attributes

Inherited from:: CPDynamicSprite
Source: CPDynamicSprite.scala

Checks the visibility flag.

If object is invisible than only update method will be called on each frame. If object is visible and in camera frame - method render will be called as well to render itself. Note that shaders are called regardless of whether the object visible, in camera frame or invisible.

Attributes

See also: show

hide

setVisible
Inherited from:: CPSceneObject
Source: CPSceneObject.scala

Called after all scene objects have been updated but before any of them were rendered. It allows, for example, to rearrange UI sprites on the screen after all of them had a chance to update their dimensions but before they are actually rendered on the screen. Essentially, it provides for "post-update, pre-render" notification. The order in which scene objects are called is undefined.

Note that in most cases one should not override this callback. It is only meant for the use cases when one needs to be notified when all scene objects to be updated but before any of them are rendered. Default implementation is no-op. No rendering should be done in this callback.

Default implementation is no-op.

Value parameters

ctx: Frame context. This context provides bulk of functionality that a scene object can do in a game, e.g. interact with other scene objects, check collisions, read input events and manage input focus, add or remove scene objects, add new and switch between scenes, etc.

Attributes

See also: render

update
Inherited from:: CPSceneObject
Source: CPSceneObject.scala

Callback on lifecycle object activation. Default implementation is no-op.

Attributes

See also: CPLifecycle.State.LF_ACTIVE
Inherited from:: CPLifecycle
Source: CPLifecycle.scala

Callback on lifecycle object deactivation. Default implementation is no-op.

Attributes

See also: CPLifecycle.State.LF_INACTIVE
Inherited from:: CPLifecycle
Source: CPLifecycle.scala

Callback on lifecycle object start. Default implementation is no-op.

Attributes

See also: CPLifecycle.State.LF_STARTED
Inherited from:: CPLifecycle
Source: CPLifecycle.scala

Callback on lifecycle object stop. Default implementation is no-op.

Attributes

See also: CPLifecycle.State.LF_STOPPED
Inherited from:: CPLifecycle
Source: CPLifecycle.scala

Resets this sprite to its initial XYZ-coordinates.

Attributes

Inherited from:: CPDynamicSprite
Source: CPDynamicSprite.scala

Resets this sprite to its initial XY-coordinates.

Attributes

Inherited from:: CPDynamicSprite
Source: CPDynamicSprite.scala

Sets visibility flag. Note that by default all scene objects are visible. Note also that this change happens immediately in the same frame. If you want this to happen in the next frame only you need to use CPSceneObjectContext.runNextFrame.

Value parameters

vis: true to make this object visible, false otherwise.

Attributes

See also: show

hide

CPSceneObjectContext.runNextFrame

CPSceneObjectContext.runLater
Inherited from:: CPSceneObject
Source: CPSceneObject.scala

Sets current X-coordinate. This coordinate will be returned from getX method.

Value parameters

d: X-coordinate to set.

Attributes

Inherited from:: CPDynamicSprite
Source: CPDynamicSprite.scala

Sets both current XY-coordinates.

Value parameters

a: X-coordinate to set.
b: Y-coordinate to set.

Attributes

Inherited from:: CPDynamicSprite
Source: CPDynamicSprite.scala

Sets both current XY-coordinates as wel as z-index.

Value parameters

a: X-coordinate to set.
b: Y-coordinate to set.
z: Z-index to set.

Attributes

Inherited from:: CPDynamicSprite
Source: CPDynamicSprite.scala

Sets current Y-coordinate. This coordinate will be returned from getY method.

Value parameters

d: Y-coordinate to set.

Attributes

Inherited from:: CPDynamicSprite
Source: CPDynamicSprite.scala

Sets current z-index. This index will be returned from getZ method.

Value parameters

z: Z-index to set.

Attributes

Inherited from:: CPDynamicSprite
Source: CPDynamicSprite.scala

Shortcut method for showing this object. Note that by default all scene objects are visible. Note also that this change happens immediately in the same frame. If you want this to happen in the next frame only you need to use CPSceneObjectContext.runNextFrame.

Attributes

See also: setVisible

CPSceneObjectContext.runNextFrame

CPSceneObjectContext.runLater
Inherited from:: CPSceneObject
Source: CPSceneObject.scala

Inherited fields

Initial X-coordinate of the sprite.

Attributes

See also: setX
Inherited from:: CPDynamicSprite
Source: CPDynamicSprite.scala

Initial Y-coordinate of the sprite.

Attributes

See also: setY
Inherited from:: CPDynamicSprite
Source: CPDynamicSprite.scala

Initial Z-index of the sprite.

Attributes

See also: setZ
Inherited from:: CPDynamicSprite
Source: CPDynamicSprite.scala

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