objectdraw
Class VisibleImage

java.lang.Object
  objectdraw.Drawable
      objectdraw.Drawable2D
          objectdraw.Resizable2D
              objectdraw.VisibleImage

All Implemented Interfaces:

Drawable2DInterface, DrawableInterface, Resizable2DInterface, java.io.Serializable

public class VisibleImage

extends objectdraw.Resizable2D

implements Resizable2DInterface

A VisibleImage represents an Image that can be drawn on the canvas.

Version:

1.1.2 released July 2006

See Also:

Serialized Form

Constructor Summary

VisibleImage(java.awt.Image image, double x, double y, double width, double height, DrawingCanvas canvas)
Creates a new VisibleImage object.

VisibleImage(java.awt.Image image, double x, double y, DrawingCanvas canvas)
Creates a new VisibleImage object.

VisibleImage(java.awt.Image image, Location origin, double width, double height, DrawingCanvas canvas)
Creates a new VisibleImage object.

VisibleImage(java.awt.Image image, Location origin, DrawingCanvas canvas)
Creates a new VisibleImage object.

Method Summary

void	addToCanvas(DrawingCanvas canvas) Places an existing object on a specified DrawingCanvas.
boolean	contains(Location point) Determines if a particular position on the DrawingCanvas is contained within the object.
DrawingCanvas	getCanvas() Determine which (if any) DrawingCanvas this object is positioned on
java.awt.Color	getColor() Retrieves the color of the object.
double	getHeight() Get the height of a graphical object
java.awt.Image	getImage() Access the (unscaled) Image currently displayed by this VisibleImage
Location	getLocation() Get a graphical object's position
double	getWidth() Get the width of a graphical object
double	getX() Get the x coordinate of left edge of rectangle bounding the object
double	getY() Get the y coordinate of top edge of rectangle bounding the object
void	hide() Temporarily hides an object on a DrawingCanvas from view.
boolean	isHidden() Determine whether an object is currently visible on its canvas
void	move(double dx, double dy) Moves the object within the canvas in the x and y direction by the amounts specified as parameters.
void	moveTo(double x, double y) Moves the object within the canvas to the x and y coordinates provided.
void	moveTo(Location location) Moves the object within the canvas to the specified Location
boolean	overlaps(Drawable2DInterface item) Determines if another Drawable's bounding rectangle overlaps with this object's bounding rectangle.
void	removeFromCanvas() Permanently removes the object from the canvas it is currently on.
void	sendBackward() Sends the object backward.
void	sendForward() Sends the object forward.
void	sendToBack() Sends the object to the back.
void	sendToFront() Sends the object to the front.
void	setColor(java.awt.Color c) Sets the color of the object.
void	setHeight(double height) Sets the height of the object's bounding rectangle
void	setImage(java.awt.Image newImage) Change the Image displayed by this VisibleImage
void	setSize(double width, double height) Sets the width and height of the rectangle bounding the object.
void	setWidth(double width) Sets the width of the object's bounding rectangle
void	show() Shows the object if it has been hidden.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface objectdraw.Drawable2DInterface

getLocation, getX, getY, overlaps

Methods inherited from interface objectdraw.DrawableInterface

contains, getCanvas, getColor, hide, isHidden, moveTo, removeFromCanvas, sendBackward, sendForward, sendToBack, sendToFront, setColor, show

Constructor Detail

VisibleImage

public VisibleImage(java.awt.Image image,
                    Location origin,
                    DrawingCanvas canvas)

Creates a new VisibleImage object.

Parameters:

image - the image to display

origin - the upper left corner of the bounding rectangle

canvas - the canvas in which the image is created

VisibleImage

public VisibleImage(java.awt.Image image,
                    double x,
                    double y,
                    DrawingCanvas canvas)

Creates a new VisibleImage object.

Parameters:

image - the image to display

x - coordinate of the upper left corner of the bounding rectangle

y - coordinate of the upper left corner of the bounding rectangle

canvas - the canvas in which the image is created

VisibleImage

public VisibleImage(java.awt.Image image,
                    Location origin,
                    double width,
                    double height,
                    DrawingCanvas canvas)

Creates a new VisibleImage object.

Parameters:

image - the image to display

origin - the upper left corner of the bounding rectangle

width - the width of the bounding rectangle

height - the height of the bounding rectangle

canvas - the canvas in which the image is created

VisibleImage

public VisibleImage(java.awt.Image image,
                    double x,
                    double y,
                    double width,
                    double height,
                    DrawingCanvas canvas)

Creates a new VisibleImage object.

Parameters:

image - the image to display

x - coordinate of the upper left corner of the bounding rectangle

y - coordinate of the upper left corner of the bounding rectangle

width - the width of the bounding rectangle

height - the height of the bounding rectangle

canvas - the canvas in which the image is created

Method Detail

addToCanvas

public void addToCanvas(DrawingCanvas canvas)

Description copied from interface: DrawableInterface

Places an existing object on a specified DrawingCanvas. This method will fail if the object is already on a canvas. Therefore, to move an object from one canvas to another one must use removeFromCanvas() followed by addToCanvas. This method can also be invoked to place a Drawable object on a DrawingCanvas after the object is loaded from a file or other stream.

Specified by:

addToCanvas in interface DrawableInterface

moveTo

public void moveTo(Location location)

Description copied from interface: DrawableInterface

Moves the object within the canvas to the specified Location

Specified by:

moveTo in interface DrawableInterface

move

public void move(double dx,
                 double dy)

Description copied from interface: DrawableInterface

Moves the object within the canvas in the x and y direction by the amounts specified as parameters.

Specified by:

move in interface DrawableInterface

getImage

public java.awt.Image getImage()

Access the (unscaled) Image currently displayed by this VisibleImage

Returns:

the image currently displayed by this VisibleImage

setImage

public void setImage(java.awt.Image newImage)

Change the Image displayed by this VisibleImage

Parameters:

newImage - the Image to be displayed

setSize

public void setSize(double width,
                    double height)

Description copied from interface: Resizable2DInterface

Sets the width and height of the rectangle bounding the object.

Specified by:

setSize in interface Resizable2DInterface

setWidth

public void setWidth(double width)

Description copied from interface: Resizable2DInterface

Sets the width of the object's bounding rectangle

Specified by:

setWidth in interface Resizable2DInterface

setHeight

public void setHeight(double height)

Description copied from interface: Resizable2DInterface

Sets the height of the object's bounding rectangle

Specified by:

setHeight in interface Resizable2DInterface

getWidth

public double getWidth()

Description copied from interface: Drawable2DInterface

Get the width of a graphical object

Specified by:

getWidth in interface Drawable2DInterface

getHeight

public double getHeight()

Description copied from interface: Drawable2DInterface

Get the height of a graphical object

Specified by:

getHeight in interface Drawable2DInterface

getX

public double getX()

Description copied from interface: Drawable2DInterface

Get the x coordinate of left edge of rectangle bounding the object

Specified by:

getX in interface Drawable2DInterface

Returns:

the x coordinate of the upper left corner of the object's bounding rectangle

getY

public double getY()

Description copied from interface: Drawable2DInterface

Get the y coordinate of top edge of rectangle bounding the object

Specified by:

getY in interface Drawable2DInterface

Returns:

the y coordinate of the upper left corner of the object's bounding rectangle

getLocation

public Location getLocation()

Description copied from interface: Drawable2DInterface

Get a graphical object's position

Specified by:

getLocation in interface Drawable2DInterface

Returns:

the location of the upper left corner of the object's bounding rectangle

contains

public boolean contains(Location point)

Description copied from interface: DrawableInterface

Determines if a particular position on the DrawingCanvas is contained within the object.

Specified by:

contains in interface DrawableInterface

overlaps

public boolean overlaps(Drawable2DInterface item)

Description copied from interface: Drawable2DInterface

Determines if another Drawable's bounding rectangle overlaps with this object's bounding rectangle.

Specified by:

overlaps in interface Drawable2DInterface

Parameters:

item - the other object

Returns:

true if item intersects this object; false otherwise.

removeFromCanvas

public void removeFromCanvas()

Description copied from interface: DrawableInterface

Permanently removes the object from the canvas it is currently on. If you want to just make an object temporarily invisible, use hide() instead.

Specified by:

removeFromCanvas in interface DrawableInterface

getCanvas

public DrawingCanvas getCanvas()

Description copied from interface: DrawableInterface

Determine which (if any) DrawingCanvas this object is positioned on

Specified by:

getCanvas in interface DrawableInterface

Returns:

the DrawingCanvas holding this object or null if it the object is not currently associated with any canvas

hide

public void hide()

Description copied from interface: DrawableInterface

Temporarily hides an object on a DrawingCanvas from view. This method should only be used if the object may later be made visible again using the show() method. If the goal is to remove an object from the display permanently, the removeFromCanvas() method should be used instead.

Specified by:

hide in interface DrawableInterface

show

public void show()

Description copied from interface: DrawableInterface

Shows the object if it has been hidden.

Specified by:

show in interface DrawableInterface

isHidden

public boolean isHidden()

Description copied from interface: DrawableInterface

Determine whether an object is currently visible on its canvas

Specified by:

isHidden in interface DrawableInterface

Returns:

true if the object is currently hidden.

moveTo

public void moveTo(double x,
                   double y)

Description copied from interface: DrawableInterface

Moves the object within the canvas to the x and y coordinates provided.

Specified by:

moveTo in interface DrawableInterface

Parameters:

x - horizontal coordinate of destination.

y - horizontal coordinate of destination.

setColor

public void setColor(java.awt.Color c)

Description copied from interface: DrawableInterface

Sets the color of the object.

Specified by:

setColor in interface DrawableInterface

Parameters:

c - the color.

getColor

public java.awt.Color getColor()

Description copied from interface: DrawableInterface

Retrieves the color of the object.

Specified by:

getColor in interface DrawableInterface

Returns:

the object's color.

sendForward

public void sendForward()

Description copied from interface: DrawableInterface

Sends the object forward.

Specified by:

sendForward in interface DrawableInterface

sendBackward

public void sendBackward()

Description copied from interface: DrawableInterface

Sends the object backward.

Specified by:

sendBackward in interface DrawableInterface

sendToFront

public void sendToFront()

Description copied from interface: DrawableInterface

Sends the object to the front.

Specified by:

sendToFront in interface DrawableInterface

sendToBack

public void sendToBack()

Description copied from interface: DrawableInterface

Sends the object to the back.

Specified by:

sendToBack in interface DrawableInterface