| Package | flash.geom |
| Class | public class Rectangle |
| Inheritance | Rectangle  Object |
| Subclasses | RoundedRectangle |
| Language Version: | ActionScript 3.0 |
| Runtime Versions: | AIR 1.0, Flash Player 9, Flash Lite 4 |
The x, y, width, and
height properties of the Rectangle class are
independent of each other; changing the value of one property has
no effect on the others. However, the right and bottom
properties are integrally related to those four properties. For example, if you change
the value of the right property, the value of the width property
changes; if you change the bottom property, the value of the height
property changes.
The following methods and properties use Rectangle objects:
- The
applyFilter(),colorTransform(),copyChannel(),copyPixels(),draw(),fillRect(),generateFilterRect(),getColorBoundsRect(),getPixels(),merge(),paletteMap(),pixelDisolve(),setPixels(), andthreshold()methods, and therectproperty of the BitmapData class - The
getBounds()andgetRect()methods, and thescrollRectandscale9Gridproperties of the DisplayObject class - The
getCharBoundaries()method of the TextField class - The
pixelBoundsproperty of the Transform class - The
boundsparameter for thestartDrag()method of the Sprite class - The
printAreaparameter of theaddPage()method of the PrintJob class
You can use the new Rectangle() constructor to create a
Rectangle object.
Note: The Rectangle class does not define a rectangular Shape display object. To draw
a rectangular Shape object onscreen, use the drawRect() method of the Graphics
class.
More examples
Finding unions and intersections of Rectangle objects
Setting size, scale, and orientation
Learn more
Related API Elements
flash.display.BitmapData
flash.display.DisplayObject
flash.display.NativeWindow
flash.text.TextField.getCharBoundaries()
flash.geom.Transform.pixelBounds
flash.display.Sprite.startDrag()
flash.printing.PrintJob.addPage()
Hide Inherited Public Properties
Show Inherited Public Properties| Property | Defined By | ||
|---|---|---|---|
| bottom : Number
The sum of the y and
height properties. | Rectangle | ||
| bottomRight : Point
The location of the Rectangle object's bottom-right corner, determined by the values of the right and
bottom properties. | Rectangle | ||
 | constructor : Object
A reference to the class object or constructor function for a given object instance. | Object | |
| height : Number
The height of the rectangle, in pixels. | Rectangle | ||
| left : Number
The x coordinate of the top-left corner of the rectangle. | Rectangle | ||
| right : Number
The sum of the x and
width properties. | Rectangle | ||
| size : Point
The size of the Rectangle object, expressed as a Point object with the values
of the width and height properties. | Rectangle | ||
| top : Number
The y coordinate of the top-left corner of the rectangle. | Rectangle | ||
| topLeft : Point
The location of the Rectangle object's top-left corner, determined by the x and
y coordinates of the point. | Rectangle | ||
| width : Number
The width of the rectangle, in pixels. | Rectangle | ||
| x : Number
The x coordinate of the top-left corner of the rectangle. | Rectangle | ||
| y : Number
The y coordinate of the top-left corner of the rectangle. | Rectangle | ||
| Method | Defined By | ||
|---|---|---|---|
Creates a new Rectangle object with the top-left corner specified by the x
and y parameters and with the specified width and height
parameters. | Rectangle | ||
Returns a new Rectangle object with the same values for the x, y,
width, and height properties as the original Rectangle object. | Rectangle | ||
Determines whether the specified point is contained within the rectangular region defined
by this Rectangle object. | Rectangle | ||
Determines whether the specified point is contained within the rectangular region defined
by this Rectangle object. | Rectangle | ||
Determines whether the Rectangle object specified by the rect parameter is contained
within this Rectangle object. | Rectangle | ||
Copies all of rectangle data from the source Rectangle object into the
calling Rectangle object. | Rectangle | ||
Determines whether the object specified in the toCompare parameter is
equal to this Rectangle object. | Rectangle | ||
|
Indicates whether an object has a specified property defined. | Object | |
Increases the size of the Rectangle object by the specified amounts, in pixels. | Rectangle | ||
Increases the size of the Rectangle object. | Rectangle | ||
If the Rectangle object specified in the toIntersect parameter intersects with this Rectangle
object, returns the area of intersection as a Rectangle object. | Rectangle | ||
Determines whether the object specified in the toIntersect parameter intersects
with this Rectangle object. | Rectangle | ||
Determines whether or not this Rectangle object is empty. | Rectangle | ||
|
Indicates whether an instance of the Object class is in the prototype chain of the object specified
as the parameter. | Object | |
Adjusts the location of the Rectangle object, as determined by its top-left corner,
by the specified amounts. | Rectangle | ||
Adjusts the location of the Rectangle object using a Point object as a parameter. | Rectangle | ||
|
Indicates whether the specified property exists and is enumerable. | Object | |
Sets all of the Rectangle object's properties to 0. | Rectangle | ||
|
Sets the availability of a dynamic property for loop operations. | Object | |
Sets the members of Rectangle to the specified values
| Rectangle | ||
|
Returns the string representation of this object, formatted according to locale-specific conventions. | Object | |
Builds and returns a string that lists the horizontal and vertical positions
and the width and height of the Rectangle object. | Rectangle | ||
Adds two rectangles together to create a new Rectangle object, by
filling in the horizontal and vertical space between the two rectangles. | Rectangle | ||
|
Returns the primitive value of the specified object. | Object | |
bottom | property |
bottomRight | property |
bottomRight:Point| Language Version: | ActionScript 3.0 |
| Runtime Versions: | AIR 1.0, Flash Player 9, Flash Lite 4 |
The location of the Rectangle object's bottom-right corner, determined by the values of the right and
bottom properties.
Implementation
public function get bottomRight():Point public function set bottomRight(value:Point):voidRelated API Elements
height | property |
public var height:Number| Language Version: | ActionScript 3.0 |
| Runtime Versions: | AIR 1.0, Flash Player 9, Flash Lite 4 |
The height of the rectangle, in pixels. Changing the height value of a Rectangle
object has no effect on the x, y, and
width properties.
More examples
Related API Elements
left | property |
left:Number| Language Version: | ActionScript 3.0 |
| Runtime Versions: | AIR 1.0, Flash Player 9, Flash Lite 4 |
The x coordinate of the top-left corner of the rectangle. Changing
the left property of a Rectangle object has no effect on the y
and height properties. However it does affect the width
property, whereas changing the x value does not affect the
width property.
The value of the left property is equal to the value of the
x property.
Implementation
public function get left():Number public function set left(value:Number):voidMore examples
Related API Elements
right | property |
size | property |
size:Point| Language Version: | ActionScript 3.0 |
| Runtime Versions: | AIR 1.0, Flash Player 9, Flash Lite 4 |
The size of the Rectangle object, expressed as a Point object with the values
of the width and height properties.
Implementation
public function get size():Point public function set size(value:Point):voidRelated API Elements
top | property |
top:Number| Language Version: | ActionScript 3.0 |
| Runtime Versions: | AIR 1.0, Flash Player 9, Flash Lite 4 |
The y coordinate of the top-left corner of the rectangle. Changing
the top property of a Rectangle object has no effect on the x
and width properties. However it does affect the height
property, whereas changing the y value does not affect the
height property.
The value of the top property is equal to the value of the y property.
Implementation
public function get top():Number public function set top(value:Number):voidMore examples
Related API Elements
topLeft | property |
topLeft:Point| Language Version: | ActionScript 3.0 |
| Runtime Versions: | AIR 1.0, Flash Player 9, Flash Lite 4 |
The location of the Rectangle object's top-left corner, determined by the x and y coordinates of the point.
Implementation
public function get topLeft():Point public function set topLeft(value:Point):voidRelated API Elements
width | property |
public var width:Number| Language Version: | ActionScript 3.0 |
| Runtime Versions: | AIR 1.0, Flash Player 9, Flash Lite 4 |
The width of the rectangle, in pixels. Changing the width value of a Rectangle object
has no effect on the x, y, and height
properties.
More examples
Related API Elements
x | property |
public var x:Number| Language Version: | ActionScript 3.0 |
| Runtime Versions: | AIR 1.0, Flash Player 9, Flash Lite 4 |
The x coordinate of the top-left corner of the rectangle. Changing
the value of the x property of a Rectangle object has no effect on the
y,
width, and height properties.
The value of the x property is equal to the value of the
left property.
More examples
Related API Elements
y | property |
public var y:Number| Language Version: | ActionScript 3.0 |
| Runtime Versions: | AIR 1.0, Flash Player 9, Flash Lite 4 |
The y coordinate of the top-left corner of the rectangle. Changing
the value of the y property of a Rectangle object has no effect on the
x, width, and height properties.
The value of the y property is equal to the value of
the top property.
More examples
Related API Elements
Rectangle | () | Constructor |
public function Rectangle(x:Number = 0, y:Number = 0, width:Number = 0, height:Number = 0)| Language Version: | ActionScript 3.0 |
| Runtime Versions: | AIR 1.0, Flash Player 9, Flash Lite 4 |
Creates a new Rectangle object with the top-left corner specified by the x
and y parameters and with the specified width and height
parameters. If you call this function without parameters,
a rectangle with x, y, width, and height
properties set to 0 is created.
x:Number (default = 0) | |
y:Number (default = 0) | |
width:Number (default = 0) | |
height:Number (default = 0) |
Related API Elements
clone | () | method |
public function clone():Rectangle| Language Version: | ActionScript 3.0 |
| Runtime Versions: | AIR 1.0, Flash Player 9, Flash Lite 4 |
Returns a new Rectangle object with the same values for the x, y,
width, and height properties as the original Rectangle object.
Rectangle — A new Rectangle object with the same values for the x, y,
width, and height properties as the original Rectangle object.
|
Related API Elements
contains | () | method |
public function contains(x:Number, y:Number):Boolean| Language Version: | ActionScript 3.0 |
| Runtime Versions: | AIR 1.0, Flash Player 9, Flash Lite 4 |
Determines whether the specified point is contained within the rectangular region defined by this Rectangle object.
Parameters
x:Number — The x coordinate (horizontal position) of the point.
| |
y:Number — The y coordinate (vertical position) of the point.
|
Boolean — A value of true if the Rectangle object contains the specified point;
otherwise false.
|
Related API Elements
containsPoint | () | method |
public function containsPoint(point:Point):Boolean| Language Version: | ActionScript 3.0 |
| Runtime Versions: | AIR 1.0, Flash Player 9, Flash Lite 4 |
Determines whether the specified point is contained within the rectangular region defined
by this Rectangle object. This method is similar to the Rectangle.contains() method,
except that it takes a Point object as a parameter.
Parameters
point:Point — The point, as represented by its x and y coordinates.
|
Boolean — A value of true if the Rectangle object contains the specified point;
otherwise false.
|
Related API Elements
containsRect | () | method |
public function containsRect(rect:Rectangle):Boolean| Language Version: | ActionScript 3.0 |
| Runtime Versions: | AIR 1.0, Flash Player 9, Flash Lite 4 |
Determines whether the Rectangle object specified by the rect parameter is contained
within this Rectangle object. A Rectangle object is said to contain another if the second
Rectangle object falls entirely within the boundaries of the first.
Parameters
rect:Rectangle — The Rectangle object being checked.
|
Boolean — A value of true if the Rectangle object that you specify is
contained by this Rectangle object; otherwise false.
|
copyFrom | () | method |
public function copyFrom(sourceRect:Rectangle):void| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 11, AIR 3.0, Flash Lite 4 |
Copies all of rectangle data from the source Rectangle object into the calling Rectangle object.
Parameters
sourceRect:Rectangle — The Rectangle object from which to copy the data.
|
equals | () | method |
public function equals(toCompare:Rectangle):Boolean| Language Version: | ActionScript 3.0 |
| Runtime Versions: | AIR 1.0, Flash Player 9, Flash Lite 4 |
Determines whether the object specified in the toCompare parameter is
equal to this Rectangle object. This method compares the x, y,
width, and height properties of an object against the same properties
of this Rectangle object.
Parameters
toCompare:Rectangle — The rectangle to compare to this Rectangle object.
|
Boolean — A value of true if the object has exactly the same values for the
x, y, width, and height properties
as this Rectangle object; otherwise false.
|
Related API Elements
inflate | () | method |
public function inflate(dx:Number, dy:Number):void| Language Version: | ActionScript 3.0 |
| Runtime Versions: | AIR 1.0, Flash Player 9, Flash Player 9, Flash Lite 4 |
Increases the size of the Rectangle object by the specified amounts, in pixels. The center point of the
Rectangle object stays the same, and its size increases to the left and right by the
dx value, and to the top and the bottom by the dy value.
Parameters
dx:Number — The value to be added to the left and the right of the Rectangle object. The following
equation is used to calculate the new width and position of the rectangle:
x -= dx;
width += 2 * dx;
| |
dy:Number — The value to be added to the top and the bottom of the Rectangle. The
following equation is used to calculate the new height and position of the rectangle:
y -= dy;
height += 2 * dy;
|
More examples
Related API Elements
inflatePoint | () | method |
public function inflatePoint(point:Point):void| Language Version: | ActionScript 3.0 |
| Runtime Versions: | AIR 1.0, Flash Player 9, Flash Lite 4 |
Increases the size of the Rectangle object.
This method is similar to the Rectangle.inflate() method
except it takes a Point object as a parameter.
The following two code examples give the same result:
var rect1:Rectangle = new Rectangle(0,0,2,5);
rect1.inflate(2,2)
var rect1:Rectangle = new Rectangle(0,0,2,5);
var pt1:Point = new Point(2,2);
rect1.inflatePoint(pt1)
Parameters
point:Point — The x property of this Point object is used to increase the
horizontal dimension of the Rectangle object. The y property
is used to increase the vertical dimension of the Rectangle object.
|
More examples
Related API Elements
intersection | () | method |
public function intersection(toIntersect:Rectangle):Rectangle| Language Version: | ActionScript 3.0 |
| Runtime Versions: | AIR 1.0, Flash Player 9, Flash Lite 4 |
If the Rectangle object specified in the toIntersect parameter intersects with this Rectangle
object, returns the area of intersection as a Rectangle object.
If the rectangles do not intersect, this method returns an empty Rectangle object with its properties
set to 0.
Parameters
toIntersect:Rectangle — The Rectangle object to compare against to see if it intersects with
this Rectangle object.
|
Rectangle — A Rectangle object that equals the area of intersection. If the rectangles do not
intersect, this method returns an empty Rectangle object; that is, a rectangle with its x,
y, width, and height properties set to 0.
|
More examples
intersects | () | method |
public function intersects(toIntersect:Rectangle):Boolean| Language Version: | ActionScript 3.0 |
| Runtime Versions: | AIR 1.0, Flash Player 9, Flash Lite 4 |
Determines whether the object specified in the toIntersect parameter intersects
with this Rectangle object. This method checks the x, y,
width, and height properties of the specified Rectangle object to see
if it intersects with this Rectangle object.
Parameters
toIntersect:Rectangle — The Rectangle object to compare against this Rectangle object.
|
Boolean — A value of true if the specified object intersects with this Rectangle object;
otherwise false.
|
More examples
Related API Elements
isEmpty | () | method |
public function isEmpty():Boolean| Language Version: | ActionScript 3.0 |
| Runtime Versions: | AIR 1.0, Flash Player 9, Flash Lite 4 |
Determines whether or not this Rectangle object is empty.
ReturnsBoolean — A value of true if the Rectangle object's width or height is less than
or equal to 0; otherwise false.
|
offset | () | method |
public function offset(dx:Number, dy:Number):void| Language Version: | ActionScript 3.0 |
| Runtime Versions: | AIR 1.0, Flash Player 9, Flash Lite 4 |
Adjusts the location of the Rectangle object, as determined by its top-left corner, by the specified amounts.
Parameters
dx:Number — Moves the x value of the Rectangle object by this amount.
| |
dy:Number — Moves the y value of the Rectangle object by this amount.
|
More examples
offsetPoint | () | method |
public function offsetPoint(point:Point):void| Language Version: | ActionScript 3.0 |
| Runtime Versions: | AIR 1.0, Flash Player 9, Flash Lite 4 |
Adjusts the location of the Rectangle object using a Point object as a parameter.
This method is similar to the Rectangle.offset() method, except that it takes a Point
object as a parameter.
Parameters
point:Point — A Point object to use to offset this Rectangle object.
|
More examples
Related API Elements
setEmpty | () | method |
public function setEmpty():void| Language Version: | ActionScript 3.0 |
| Runtime Versions: | AIR 1.0, Flash Player 9, Flash Lite 4 |
Sets all of the Rectangle object's properties to 0. A Rectangle object is empty if its width or height is less than or equal to 0.
This method sets the values of the x, y,
width, and height properties to 0.
Related API Elements
setTo | () | method |
public function setTo(xa:Number, ya:Number, widtha:Number, heighta:Number):void| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 11, AIR 3.0, Flash Lite 4 |
Sets the members of Rectangle to the specified values
Parameters
xa:Number — the values to set the rectangle to.
| |
ya:Number | |
widtha:Number | |
heighta:Number |
toString | () | method |
public function toString():String| Language Version: | ActionScript 3.0 |
| Runtime Versions: | AIR 1.0, Flash Player 9, Flash Lite 4 |
Builds and returns a string that lists the horizontal and vertical positions and the width and height of the Rectangle object.
ReturnsString — A string listing the value of each of the following properties of the Rectangle object:
x, y, width, and height.
|
Related API Elements
union | () | method |
public function union(toUnion:Rectangle):Rectangle| Language Version: | ActionScript 3.0 |
| Runtime Versions: | AIR 1.0, Flash Player 9, Flash Lite 4 |
Adds two rectangles together to create a new Rectangle object, by filling in the horizontal and vertical space between the two rectangles.
Note: The union() method ignores rectangles with 0
as the height or width value, such as: var rect2:Rectangle = new Rectangle(300,300,50,0);
Parameters
toUnion:Rectangle — A Rectangle object to add to this Rectangle object.
|
Rectangle — A new Rectangle object that is the union of the two rectangles.
|
More examples
trace() method to confirm that the Rectangle instances were successfully created. Then a Boolean
variable isContained is assigned to the result of the call to
the containsRect() method,
which determines that the second rectangle does not fully enclose the third rectangle.
package {
import flash.display.Sprite;
import flash.geom.Rectangle;
public class RectangleExample extends Sprite {
public function RectangleExample() {
var firstRect:Rectangle = new Rectangle();
trace(firstRect); // (x=0, y=0, w=0, h=0)
var secondRect:Rectangle = new Rectangle(1, 3, 11, 13);
trace(secondRect); // (x=1, y=3, w=11, h=13)
var thirdRect:Rectangle = new Rectangle(5, 8, 17, 19);
trace(thirdRect); // (x=5, y=8, w=17, h=19)
var isContained:Boolean = secondRect.containsRect(thirdRect);
trace(isContained); // false
}
}
}
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