Libraries.Game.Layer

This action will add a MouseListener to the layer. When the layer receives a mouse event, it will first try to find the topmost item which can handle the event. If the event is not handled, then all MouseListeners in the layer will receive the event.

Example Code

use Libraries.Game.Game
    use Libraries.Game.Layer2D
    use Libraries.Interface.Events.MouseListener

    class Main is Game

        // For most programs, this should be replaced with 
        // a custom class inheriting from MouseListener.
        MouseListener myListener

        action Main
            StartGame()
        end

        action CreateGame
            Layer2D layer
            layer:AddMouseListener(myListener)
            AddLayer(layer)
        end

        action Update(number seconds)
        end

    end

This action will add a MouseMovementListener to the layer. When the layer receives a mouse event, it will first try to find the topmost item which can handle the event. If the event is not handled, then all MouseMovementListeners in the layer will receive the event.

Example Code

use Libraries.Game.Game
    use Libraries.Game.Layer2D
    use Libraries.Interface.Events.MouseMovementListener

    class Main is Game

        // For most programs, this should be replaced with 
        // a custom class inheriting from MouseMovementListener.
        MouseMovementListener myListener

        action Main
            StartGame()
        end

        action CreateGame
            Layer2D layer
            layer:AddMouseMovementListener(myListener)
            AddLayer(layer)
        end

        action Update(number seconds)
        end

    end

This action will add a MouseWheelListener to the layer. When the layer receives a mouse event, it will first try to find the topmost item which can handle the event. If the event is not handled, then all MouseWheelListeners in the layer will receive the event.

Example Code

use Libraries.Game.Game
    use Libraries.Game.Layer2D
    use Libraries.Interface.Events.MouseWheelListener

    class Main is Game

        // For most programs, this should be replaced with 
        // a custom class inheriting from MouseWheelListener.
        MouseWheelListener myListener

        action Main
            StartGame()
        end

        action CreateGame
            Layer2D layer
            layer:AddMouseWheelListener(myListener)
            AddLayer(layer)
        end

        action Update(number seconds)
        end

    end

This action will add a TouchListener to the layer. When the layer receives a touch event, it will first try to find the topmost item which can handle the event. If the event is not handled, then all TouchListeners in the layer will receive the event.

Example Code

use Libraries.Game.Game
    use Libraries.Game.Layer2D
    use Libraries.Interface.Events.TouchListener

    class Main is Game

        // For most programs, this should be replaced with 
        // a custom class inheriting from TouchListener.
        TouchListener myListener

        action Main
            StartGame()
        end

        action CreateGame
            Layer2D layer
            layer:AddTouchListener(myListener)
            AddLayer(layer)
        end

        action Update(number seconds)
        end

    end

This action compares two object hash codes and returns an integer. The result is larger if this hash code is larger than the object passed as a parameter, smaller, or equal. In this case, -1 means smaller, 0 means equal, and 1 means larger. This action was changed in Quorum 7 to return an integer, instead of a CompareResult object, because the previous implementation was causing efficiency issues.

Example Code

Object o
        Object t
        integer result = o:Compare(t) //1 (larger), 0 (equal), or -1 (smaller)

This action will draw all items in this Layer on the screen (if they can be drawn and they aren't hidden). If the Layer is currently hidden, then this action will do nothing. This is automatically called by the Game class as needed. Most users will never need to use this action directly.

This action returns whether or not the Layer will automatically respond to ResizeEvents. If this value is true, then the Layer will automatically adjust the camera and resize Items on the Layer when a ResizeEvent occurs.

This action determines if two objects are equal based on their hash code values.

Example Code

use Libraries.Language.Object
        use Libraries.Language.Types.Text
        Object o
        Text t
        boolean result = o:Equals(t)

This action returns whether or not the Layer will automatically respond to ResizeEvents. If this value is true, then the Layer will automatically adjust the camera and resize Items on the Layer when a ResizeEvent occurs.

This action will return the camera being used by this Layer. The camera is used to determine what will be drawn on the screen. Objects will be drawn on the screen as they are seen by the Layer's set camera.

Example Code

use Libraries.Game.Game
    use Libraries.Game.Layer2D
    use Libraries.Game.Graphics.Camera

    class Main is Game

        Camera layerCamera = undefined

        action Main
            StartGame()
        end

        action CreateGame
            Layer2D layer
            layerCamera = layer:GetCamera()
            AddLayer(layer)
        end

        action Update(number seconds)
        end
    end

This action gets the hash code for an object.

Example Code

Object o
        integer hash = o:GetHashCode()

This action finds an Item on this layer which is present at the given coordinates and will respond to at least one of the given InputSets.

This action returns the name of the Layer. This is used to identify the layer, especially in the Scene system.

This action will hide the Layer. This will prevent the Layer from appearing when asked to draw.

Example Code

use Libraries.Game.Game
    use Libraries.Game.Layer2D
    use Libraries.Game.Graphics.Drawable

    class Main is Game

        action Main
            StartGame()
        end

        action CreateGame
            Drawable square
            square:LoadFilledRectangle(200, 200)
            
            Layer2D layer
            layer:Add(square)

            AddLayer(layer)
            layer:Hide()
        end

        action Update(number seconds)
        end
    end

This action will show the Layer. When Draw is called on a Layer which is showing, its items will appear on the screen. Layers begin showing by default.

Example Code

use Libraries.Game.Game
    use Libraries.Game.Layer2D
    use Libraries.Game.Graphics.Drawable

    class Main is Game

        action Main
            StartGame()
        end

        action CreateGame
            Drawable square
            square:LoadFilledRectangle(200, 200)
            
            Layer2D layer
            layer:Add(square)

            AddLayer(layer)
            layer:Hide()

            // Since layers are visible by default, it's only necessary to Show
            // them after they've been hidden.
            layer:Show()
        end

        action Update(number seconds)
        end
    end

This action sets the viewport that will be used by this Layer. Anything drawn on this Layer will appear in a rectangle that begins x pixels from the left side of the screen, y pixels from the bottom, and has the given width and height in pixels.

This action will return if the current layer is currently visible or not. Layers which are showing will be drawn on the screen automatically by the Game class. Layers begin showing by default.

Example Code

use Libraries.Game.Game
    use Libraries.Game.Layer2D
    use Libraries.Game.Graphics.Drawable

    class Main is Game

        action Main
            StartGame()
        end

        action CreateGame
            Drawable square
            square:LoadFilledRectangle(200, 200)
            
            Layer2D layer
            layer:Add(square)

            AddLayer(layer)

            boolean showing = layer:IsShowing()
            output "layer:IsShowing() returned " + showing

            layer:Hide()

            showing = layer:IsShowing()
            output "After calling Hide(), IsShowing() returned " + showing
        end

        action Update(number seconds)
        end
    end

This action will hide the Layer. This will prevent the Layer from appearing when asked to draw.

Example Code

use Libraries.Game.Game
    use Libraries.Game.Layer2D
    use Libraries.Game.Graphics.Drawable

    class Main is Game

        action Main
            StartGame()
        end

        action CreateGame
            Drawable square
            square:LoadFilledRectangle(200, 200)
            
            Layer2D layer
            layer:Add(square)

            AddLayer(layer)
            layer:Hide()
        end

        action Update(number seconds)
        end
    end

This action will return if the current layer is currently visible or not. Layers which are showing will be drawn on the screen automatically by the Game class. Layers begin showing by default.

Example Code

use Libraries.Game.Game
    use Libraries.Game.Layer2D
    use Libraries.Game.Graphics.Drawable

    class Main is Game

        action Main
            StartGame()
        end

        action CreateGame
            Drawable square
            square:LoadFilledRectangle(200, 200)
            
            Layer2D layer
            layer:Add(square)

            AddLayer(layer)

            boolean showing = layer:IsShowing()
            output "layer:IsShowing() returned " + showing

            layer:Hide()

            showing = layer:IsShowing()
            output "After calling Hide(), IsShowing() returned " + showing
        end

        action Update(number seconds)
        end
    end

This action sets if the Layer should automatically respond to ResizeEvents. If this value is true, then the Layer will automatically adjust the camera and resize Items on the Layer when a ResizeEvent occurs.

This action will notify mouse listeners that are a part of this layer of the given mouse event. This is called automatically by the Game engine as needed. Most users will never need to use this action directly.

This action will notify touch listeners that are a part of this layer of the given touch event. This is called automatically by the Game engine as needed. Most users will never need to use this action directly.

This action will remove a MouseListener from the layer. The listener will no longer receive events from the layer. If the given MouseListener is not on the layer before calling this action, then this action will have no effect.

Example Code

use Libraries.Game.Game
    use Libraries.Game.Layer2D
    use Libraries.Interface.Events.MouseListener

    class Main is Game

        // For most programs, this should be replaced with 
        // a custom class inheriting from MouseListener.
        MouseListener myListener

        action Main
            StartGame()
        end

        action CreateGame
            Layer2D layer
            layer:AddMouseListener(myListener)
            AddLayer(layer)

            layer:RemoveMouseListener(listener)
        end

        action Update(number seconds)
        end

    end

This action will remove a MouseMovementListener from the layer. The listener will no longer receive events from the layer. If the given MouseMovementListener is not on the layer before calling this action, then this action will have no effect.

Example Code

use Libraries.Game.Game
    use Libraries.Game.Layer2D
    use Libraries.Interface.Events.MouseMovementListener

    class Main is Game

        // For most programs, this should be replaced with 
        // a custom class inheriting from MouseMovementListener.
        MouseMovementListener myListener

        action Main
            StartGame()
        end

        action CreateGame
            Layer2D layer
            layer:AddMouseMovementListener(myListener)
            AddLayer(layer)

            layer:RemoveMouseMovementListener(listener)
        end

        action Update(number seconds)
        end

    end

This action will remove a MouseWheelListener from the layer. The listener will no longer receive events from the layer. If the given MouseWheelListener is not on the layer before calling this action, then this action will have no effect.

Example Code

use Libraries.Game.Game
    use Libraries.Game.Layer2D
    use Libraries.Interface.Events.MouseWheelListener

    class Main is Game

        // For most programs, this should be replaced with 
        // a custom class inheriting from MouseWheelListener.
        MouseWheelListener myListener

        action Main
            StartGame()
        end

        action CreateGame
            Layer2D layer
            layer:AddMouseWheelListener(myListener)
            AddLayer(layer)

            layer:RemoveMouseWheelListener(listener)
        end

        action Update(number seconds)
        end

    end

This action will remove a TouchListener from the layer. The listener will no longer receive events from the layer. If the given TouchListener is not on the layer before calling this action, then this action will have no effect.

Example Code

use Libraries.Game.Game
    use Libraries.Game.Layer2D
    use Libraries.Interface.Events.TouchListener

    class Main is Game

        // For most programs, this should be replaced with 
        // a custom class inheriting from TouchListener.
        TouchListener myListener

        action Main
            StartGame()
        end

        action CreateGame
            Layer2D layer
            layer:AddTouchListener(myListener)
            AddLayer(layer)

            layer:RemoveTouchListener(listener)
        end

        action Update(number seconds)
        end

    end

This action will resize the Layer to match the dimensions of the provided ResizeEvent. This action is called automatically by the Game engine if the GetAutomaticResizing() value returns true. Users should not typically need to call this action directly.

This action sets if the Layer should automatically respond to ResizeEvents. If this value is true, then the Layer will automatically adjust the camera and resize Items on the Layer when a ResizeEvent occurs.

This action will set the camera being used by this Layer. The camera is used to determine what will be drawn on the screen. Objects will be drawn on the screen as they are seen by the Layer's set camera.

Example Code

use Libraries.Game.Game
    use Libraries.Game.Layer2D
    use Libraries.Game.Graphics.OrthographicCamera

    class Main is Game

        action Main
            StartGame()
        end

        action CreateGame
            OrthographicCamera camera
            Layer2D layer
            layer:SetCamera(camera)
            AddLayer(layer)
        end

        action Update(number seconds)
        end
    end

This action sets the name of the Layer. This is used to identify the layer, especially in the Scene system.

This action sets the viewport that will be used by this Layer. Anything drawn on this Layer will appear in a rectangle that begins x pixels from the left side of the screen, y pixels from the bottom, and has the given width and height in pixels.

This actions sets the viewport that will be used by this Layer, and adjusts the Layer's camera to match the dimensions of the viewport.

This action will show the Layer. When Draw is called on a Layer which is showing, its items will appear on the screen. Layers begin showing by default.

Example Code

use Libraries.Game.Game
    use Libraries.Game.Layer2D
    use Libraries.Game.Graphics.Drawable

    class Main is Game

        action Main
            StartGame()
        end

        action CreateGame
            Drawable square
            square:LoadFilledRectangle(200, 200)
            
            Layer2D layer
            layer:Add(square)

            AddLayer(layer)
            layer:Hide()

            // Since layers are visible by default, it's only necessary to Show
            // them after they've been hidden.
            layer:Show()
        end

        action Update(number seconds)
        end
    end

This action will update all of the items contained within this Layer. The given number of seconds will be passed to each updated item. This is automatically called by the Game class as needed. Most users will never need to use this action directly.