GObject

java.lang.Object
- stanford.androidlib.graphics.GObject

Direct Known Subclasses:

GCompound, GImage, GLabel, GLine, GOval, GPolygon, GRect, GSprite
```
public abstract class GObject
extends Object
```

Constructor Summary

Constructors
Constructor and Description

GObject()
Constructs a new empty object.

Constructors
Constructor and Description
`GObject()` Constructs a new empty object.

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method and Description
`boolean`	`contains(float x, float y)` Checks to see whether a point is inside the object.
`boolean`	`contains(GPoint pt)` Checks to see whether a point is inside the object.
`float`	`getBottomY()` Returns the max Y of this object.
`GRectangle`	`getBounds()` Returns the bounding box of this object, which is defined to be the smallest rectangle that covers everything drawn by the figure.
`float`	`getCenterX()` Returns the x-value of the center of this object.
`float`	`getCenterY()` Returns the y-value of the center of this object.
`Paint`	`getColor()` Returns the color used to display this object.
`GCanvas`	`getGCanvas()` Returns the simple canvas this GObject is drawn inside of.
`float`	`getHeight()` Returns the height of this object, which is defined to be the height of the bounding box.
`GPoint`	`getLocation()` Returns the location of this object as a GPoint.
`Paint`	`getPaint()` Returns the color used to display this object.
`float`	`getRightX()` Returns the max X of this object.
`GDimension`	`getSize()` Returns the size of the bounding box for this object.
`float`	`getWidth()` Returns the width of this object, which is defined to be the width of the bounding box.
`float`	`getX()` Returns the x-coordinate of the object.
`float`	`getY()` Returns the y-coordinate of the object.
`boolean`	`intersects(GObject obj)` True if this object touches the other object.
`boolean`	`isVisible()` Checks to see whether this object is visible.
`void`	`moveBy(float dx, float dy)` Moves the object on the screen using the displacements dx and dy.
`void`	`moveByPolar(float r, float theta)` Moves the object using displacements given in polar coordinates.
`void`	`moveTo(float x, float y)` Moves the object on the screen using the displacements dx and dy.
`void`	`moveTo(GObject gobj)` Moves this GObject to have the same location as the given other GObject.
`void`	`moveToPolar(float r, float theta)` Moves the object using displacements given in polar coordinates.
`abstract void`	`paint(Canvas canvas)` All subclasses of GObject must define a paint method which allows the object to draw itself on the Graphics context passed in as the parameter g.
`void`	`repaint()`
`void`	`sendBackward()` Moves this object one step toward the back in the z dimension.
`void`	`sendForward()` Moves this object one step toward the front in the z dimension.
`void`	`sendToBack()` Moves this object to the back of the display in the z dimension.
`void`	`sendToFront()` Moves this object to the front of the display in the z dimension.
`void`	`setBottomY(float bottomY)` Sets the object's bottom y-coordinate to be the given value.
`void`	`setCanvas(Canvas canvas)` Sets the canvas this object is in.
`void`	`setColor(Paint paint)` Sets the color used to display this object.
`void`	`setGCanvas(GCanvas gcanvas)` Sets the canvas on which this GObject should be drawn.
`void`	`setLocation(float x, float y)` Sets the location of this object to the point (x, y).
`void`	`setLocation(GObject gobj)` Moves this GObject to have the same location as the given other GObject.
`void`	`setPaint(Paint paint)` Sets the color used to display this object.
`void`	`setRightX(float rightX)` Sets the object's rightmost x-coordinate to be the given value.
`void`	`setVisible(boolean visible)` Sets whether this object is visible.
`void`	`setX(float x)` Sets the x-location of this object.
`void`	`setY(float y)` Sets the y-location of this object.
`String`	`toString()` Returns a string representation of this object, including its class name, x/y coordinates, width, and height.
`void`	`translate(float dx, float dy)` Moves the object on the screen using the displacements dx and dy.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - GObject
```
public GObject()
```
    Constructs a new empty object.
- Method Detail
  - contains
```
public boolean contains(float x,
                        float y)
```
    Checks to see whether a point is inside the object.
  - contains
```
public boolean contains(GPoint pt)
```
    Checks to see whether a point is inside the object.
  - getBounds
```
public GRectangle getBounds()
```
    Returns the bounding box of this object, which is defined to be the smallest rectangle that covers everything drawn by the figure.
  - getColor
```
public Paint getColor()
```
    Returns the color used to display this object.
  - getPaint
```
public Paint getPaint()
```
    Returns the color used to display this object.
  - getHeight
```
public float getHeight()
```
    Returns the height of this object, which is defined to be the height of the bounding box.
  - getLocation
```
public GPoint getLocation()
```
    Returns the location of this object as a GPoint.
  - getSize
```
public GDimension getSize()
```
    Returns the size of the bounding box for this object.
  - getWidth
```
public float getWidth()
```
    Returns the width of this object, which is defined to be the width of the bounding box.
  - getX
```
public float getX()
```
    Returns the x-coordinate of the object.
  - getY
```
public float getY()
```
    Returns the y-coordinate of the object.
  - getCenterX
```
public float getCenterX()
```
    Returns the x-value of the center of this object.
  - getRightX
```
public float getRightX()
```
    Returns the max X of this object.
  - getCenterY
```
public float getCenterY()
```
    Returns the y-value of the center of this object.
  - getBottomY
```
public float getBottomY()
```
    Returns the max Y of this object.
  - intersects
```
public boolean intersects(GObject obj)
```
    True if this object touches the other object.
  - isVisible
```
public boolean isVisible()
```
    Checks to see whether this object is visible.
  - moveBy
```
public void moveBy(float dx,
                   float dy)
```
    Moves the object on the screen using the displacements dx and dy.
  - moveByPolar
```
public void moveByPolar(float r,
                        float theta)
```
    Moves the object using displacements given in polar coordinates.
  - moveTo
```
public void moveTo(GObject gobj)
```
    Moves this GObject to have the same location as the given other GObject.
  - translate
```
public void translate(float dx,
                      float dy)
```
    Moves the object on the screen using the displacements dx and dy.
  - moveTo
```
public void moveTo(float x,
                   float y)
```
    Moves the object on the screen using the displacements dx and dy.
  - moveToPolar
```
public void moveToPolar(float r,
                        float theta)
```
    Moves the object using displacements given in polar coordinates.
  - paint
```
public abstract void paint(Canvas canvas)
```
    All subclasses of GObject must define a paint method which allows the object to draw itself on the Graphics context passed in as the parameter g.
  - repaint
```
public void repaint()
```
  - sendBackward
```
public void sendBackward()
```
    Moves this object one step toward the back in the z dimension.
  - sendForward
```
public void sendForward()
```
    Moves this object one step toward the front in the z dimension.
  - sendToBack
```
public void sendToBack()
```
    Moves this object to the back of the display in the z dimension.
  - sendToFront
```
public void sendToFront()
```
    Moves this object to the front of the display in the z dimension.
  - setCanvas
```
public void setCanvas(Canvas canvas)
```
    Sets the canvas this object is in.
  - setColor
```
public void setColor(Paint paint)
```
    Sets the color used to display this object.
  - setPaint
```
public void setPaint(Paint paint)
```
    Sets the color used to display this object.
  - setLocation
```
public void setLocation(float x,
                        float y)
```
    Sets the location of this object to the point (x, y).
  - setLocation
```
public void setLocation(GObject gobj)
```
    Moves this GObject to have the same location as the given other GObject.
  - setX
```
public void setX(float x)
```
    Sets the x-location of this object. The y-location is unchanged.
  - setY
```
public void setY(float y)
```
    Sets the y-location of this object. The x-location is unchanged.
  - setRightX
```
public void setRightX(float rightX)
```
    Sets the object's rightmost x-coordinate to be the given value. This does not resize the object but moves it as though you had set its leftmost x-coordinate to rightX - getWidth().
  - setBottomY
```
public void setBottomY(float bottomY)
```
    Sets the object's bottom y-coordinate to be the given value. This does not resize the object but moves it as though you had set its top y-coordinate to bottomY - getHeight().
  - setGCanvas
```
public void setGCanvas(GCanvas gcanvas)
```
    Sets the canvas on which this GObject should be drawn. You probably should not call this directly, and should call add(GObject) on the canvas instead.
  - getGCanvas
```
public GCanvas getGCanvas()
```
    Returns the simple canvas this GObject is drawn inside of. If none, returns null.
  - setVisible
```
public void setVisible(boolean visible)
```
    Sets whether this object is visible.
  - toString
```
public String toString()
```
    Returns a string representation of this object, including its class name, x/y coordinates, width, and height. Useful for debugging.
    
    Overrides:
    
    toString in class Object
    
    Returns:
    
    a string representation of the object.

Class GObject

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

GObject

Method Detail

contains

contains

getBounds

getColor

getPaint

getHeight

getLocation

getSize

getWidth

getX

getY

getCenterX

getRightX

getCenterY

getBottomY

intersects

isVisible

moveBy

moveByPolar

moveTo

translate

moveTo

moveToPolar

paint

repaint

sendBackward

sendForward

sendToBack

sendToFront

setCanvas

setColor

setPaint

setLocation

setLocation

setX

setY

setRightX

setBottomY

setGCanvas

getGCanvas

setVisible

toString