Draw

Documentation of 'edu.princeton.cs.algs4.Draw' Java class Draw

All Classes

Summary:
Nested |
Field |
Constr |
Method

Detail:
Field |
Constr |
Method

java.lang.Object
- edu.princeton.cs.algs4.Draw

All Implemented Interfaces:

java.awt.event.ActionListener, java.awt.event.KeyListener, java.awt.event.MouseListener, java.awt.event.MouseMotionListener, java.util.EventListener
```
public final class Draw
extends java.lang.Object
implements java.awt.event.ActionListener, java.awt.event.MouseListener, java.awt.event.MouseMotionListener, java.awt.event.KeyListener
```
Draw. This class provides a basic capability for creating drawings with your programs. It uses a simple graphics model that allows you to create drawings consisting of points, lines, and curves in a window on your computer and to save the drawings to a file. This is the object-oriented version of standard draw; it supports multiple indepedent drawing windows.
For additional documentation, see Section 3.1 of Computer Science: An Interdisciplinary Approach by Robert Sedgewick and Kevin Wayne.

Field Summary

Fields
Modifier and Type	Field and Description
`static java.awt.Color`	`BLACK` The color black.
`static java.awt.Color`	`BLUE` The color blue.
`static java.awt.Color`	`BOOK_BLUE` Shade of blue used in Introduction to Programming in Java.
`static java.awt.Color`	`BOOK_LIGHT_BLUE` Shade of light blue used in Introduction to Programming in Java.
`static java.awt.Color`	`BOOK_RED` Shade of red used in Algorithms, 4th edition.
`static java.awt.Color`	`CYAN` The color cyan.
`static java.awt.Color`	`DARK_GRAY` The color dark gray.
`static java.awt.Color`	`GRAY` The color gray.
`static java.awt.Color`	`GREEN` The color green.
`static java.awt.Color`	`LIGHT_GRAY` The color light gray.
`static java.awt.Color`	`MAGENTA` The color magenta.
`static java.awt.Color`	`ORANGE` The color orange.
`static java.awt.Color`	`PINK` The color pink.
`static java.awt.Color`	`PRINCETON_ORANGE` Shade of orange used in Princeton's identity.
`static java.awt.Color`	`RED` The color red.
`static java.awt.Color`	`WHITE` The color white.
`static java.awt.Color`	`YELLOW` The color yellow.

Constructor Summary

Constructors
Constructor and Description

Draw()
Initializes an empty drawing object.

Draw(java.lang.String name)
Initializes an empty drawing object with the given name.

Constructors
Constructor and Description
`Draw()` Initializes an empty drawing object.
`Draw(java.lang.String name)` Initializes an empty drawing object with the given name.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method and Description
`void`	`actionPerformed(java.awt.event.ActionEvent e)` This method cannot be called directly.
`void`	`addListener(DrawListener listener)` Adds a `DrawListener` to listen to keyboard and mouse events.
`void`	`arc(double x, double y, double r, double angle1, double angle2)` Draws an arc of radius r, centered on (x, y), from angle1 to angle2 (in degrees).
`void`	`circle(double x, double y, double r)` Draws a circle of radius r, centered on (x, y).
`void`	`clear()` Clears the screen to the default color (white).
`void`	`clear(java.awt.Color color)` Clears the screen to the given color.
`void`	`disableDoubleBuffering()` Disable double buffering.
`void`	`ellipse(double x, double y, double semiMajorAxis, double semiMinorAxis)` Draws an ellipse with given semimajor and semiminor axes, centered on (x, y).
`void`	`enableDoubleBuffering()` Enable double buffering.
`void`	`filledCircle(double x, double y, double r)` Draws a filled circle of radius r, centered on (x, y).
`void`	`filledEllipse(double x, double y, double semiMajorAxis, double semiMinorAxis)` Draws an ellipse with given semimajor and semiminor axes, centered on (x, y).
`void`	`filledPolygon(double[] x, double[] y)` Draws a filled polygon with the given (x[i], y[i]) coordinates.
`void`	`filledRectangle(double x, double y, double halfWidth, double halfHeight)` Draws a filled rectangle of given half width and half height, centered on (x, y).
`void`	`filledSquare(double x, double y, double r)` Draws a filled square of side length 2r, centered on (x, y).
`java.awt.Font`	`getFont()` Gets the current font.
`javax.swing.JLabel`	`getJLabel()` Gets the current `JLabel` for use in some other GUI.
`java.awt.Color`	`getPenColor()` Gets the current pen color.
`double`	`getPenRadius()` Gets the current pen radius.
`boolean`	`hasNextKeyTyped()` Returns true if the user has typed a key.
`boolean`	`isKeyPressed(int keycode)` Returns true if the keycode is being pressed.
`boolean`	`isMousePressed()` Returns true if the mouse is being pressed.
`void`	`keyPressed(java.awt.event.KeyEvent e)` This method cannot be called directly.
`void`	`keyReleased(java.awt.event.KeyEvent e)` This method cannot be called directly.
`void`	`keyTyped(java.awt.event.KeyEvent e)` This method cannot be called directly.
`void`	`line(double x0, double y0, double x1, double y1)` Draws a line from (x0, y0) to (x1, y1).
`static void`	`main(java.lang.String[] args)` Test client.
`void`	`mouseClicked(java.awt.event.MouseEvent e)` This method cannot be called directly.
`void`	`mouseDragged(java.awt.event.MouseEvent e)` This method cannot be called directly.
`void`	`mouseEntered(java.awt.event.MouseEvent e)` This method cannot be called directly.
`void`	`mouseExited(java.awt.event.MouseEvent e)` This method cannot be called directly.
`void`	`mouseMoved(java.awt.event.MouseEvent e)` This method cannot be called directly.
`boolean`	`mousePressed()` Deprecated. replaced by `isMousePressed()`
`void`	`mousePressed(java.awt.event.MouseEvent e)` This method cannot be called directly.
`void`	`mouseReleased(java.awt.event.MouseEvent e)` This method cannot be called directly.
`double`	`mouseX()` Returns the x-coordinate of the mouse.
`double`	`mouseY()` Returns the y-coordinate of the mouse.
`char`	`nextKeyTyped()` The next key typed by the user.
`void`	`pause(int t)` Pause for t milliseconds.
`void`	`picture(double x, double y, java.lang.String filename)` Draws picture (gif, jpg, or png) centered on (x, y).
`void`	`picture(double x, double y, java.lang.String filename, double degrees)` Draws picture (gif, jpg, or png) centered on (x, y), rotated given number of degrees.
`void`	`picture(double x, double y, java.lang.String filename, double w, double h)` Draws picture (gif, jpg, or png) centered on (x, y), rescaled to w-by-h.
`void`	`picture(double x, double y, java.lang.String filename, double w, double h, double degrees)` Draws picture (gif, jpg, or png) centered on (x, y), rotated given number of degrees, rescaled to w-by-h.
`void`	`point(double x, double y)` Draws a point at (x, y).
`void`	`polygon(double[] x, double[] y)` Draws a polygon with the given (x[i], y[i]) coordinates.
`void`	`rectangle(double x, double y, double halfWidth, double halfHeight)` Draws a rectangle of given half width and half height, centered on (x, y).
`void`	`save(java.lang.String filename)` Saves this drawing to a file.
`void`	`setCanvasSize(int canvasWidth, int canvasHeight)` Sets the canvas (drawing area) to be width-by-height pixels.
`void`	`setDefaultCloseOperation(int value)` Sets the default close operation.
`void`	`setFont()` Sets the font to the default font (sans serif, 16 point).
`void`	`setFont(java.awt.Font font)` Sets the font to the given value.
`void`	`setLocationOnScreen(int x, int y)` Sets the upper-left hand corner of the drawing window to be (x, y), where (0, 0) is upper left.
`void`	`setPenColor()` Sets the pen color to the default color (black).
`void`	`setPenColor(java.awt.Color color)` Sets the pen color to the given color.
`void`	`setPenColor(int red, int green, int blue)` Sets the pen color to the given RGB color.
`void`	`setPenRadius()` Sets the pen size to the default (.002).
`void`	`setPenRadius(double r)` Sets the radius of the pen to the given size.
`void`	`setXscale()` Sets the x-scale to be the default (between 0.0 and 1.0).
`void`	`setXscale(double min, double max)` Sets the x-scale.
`void`	`setYscale()` Sets the y-scale to be the default (between 0.0 and 1.0).
`void`	`setYscale(double min, double max)` Sets the y-scale.
`void`	`show()` Copies offscreen buffer to onscreen buffer.
`void`	`show(int t)` Deprecated. replaced by `enableDoubleBuffering()`, `show()`, and `pause(int t)`
`void`	`square(double x, double y, double r)` Draws a square of side length 2r, centered on (x, y).
`void`	`text(double x, double y, java.lang.String s)` Writes the given text string in the current font, centered on (x, y).
`void`	`text(double x, double y, java.lang.String s, double degrees)` Writes the given text string in the current font, centered on (x, y) and rotated by the specified number of degrees.
`void`	`textLeft(double x, double y, java.lang.String s)` Writes the given text string in the current font, left-aligned at (x, y).
`void`	`xorOff()` Turns off xor mode.
`void`	`xorOn()` Turns on xor mode.

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

- Field Detail
  - BLACK
```
public static final java.awt.Color BLACK
```
    The color black.
  - BLUE
```
public static final java.awt.Color BLUE
```
    The color blue.
  - CYAN
```
public static final java.awt.Color CYAN
```
    The color cyan.
  - DARK_GRAY
```
public static final java.awt.Color DARK_GRAY
```
    The color dark gray.
  - GRAY
```
public static final java.awt.Color GRAY
```
    The color gray.
  - GREEN
```
public static final java.awt.Color GREEN
```
    The color green.
  - LIGHT_GRAY
```
public static final java.awt.Color LIGHT_GRAY
```
    The color light gray.
  - MAGENTA
```
public static final java.awt.Color MAGENTA
```
    The color magenta.
  - ORANGE
```
public static final java.awt.Color ORANGE
```
    The color orange.
  - PINK
```
public static final java.awt.Color PINK
```
    The color pink.
  - RED
```
public static final java.awt.Color RED
```
    The color red.
  - WHITE
```
public static final java.awt.Color WHITE
```
    The color white.
  - YELLOW
```
public static final java.awt.Color YELLOW
```
    The color yellow.
  - BOOK_BLUE
```
public static final java.awt.Color BOOK_BLUE
```
    Shade of blue used in Introduction to Programming in Java. It is Pantone 300U. The RGB values are approximately (9, 90, 166).
  - BOOK_LIGHT_BLUE
```
public static final java.awt.Color BOOK_LIGHT_BLUE
```
    Shade of light blue used in Introduction to Programming in Java. The RGB values are approximately (103, 198, 243).
  - BOOK_RED
```
public static final java.awt.Color BOOK_RED
```
    Shade of red used in Algorithms, 4th edition. It is Pantone 1805U. The RGB values are approximately (150, 35, 31).
  - PRINCETON_ORANGE
```
public static final java.awt.Color PRINCETON_ORANGE
```
    Shade of orange used in Princeton's identity. It is PMS 158. The RGB values are approximately (245, 128, 37).
- Constructor Detail
  - Draw
```
public Draw(java.lang.String name)
```
    Initializes an empty drawing object with the given name.
    
    Parameters:
    
    name - the title of the drawing window.
  - Draw
```
public Draw()
```
    Initializes an empty drawing object.
- Method Detail
  - setLocationOnScreen
```
public void setLocationOnScreen(int x,
                                int y)
```
    Sets the upper-left hand corner of the drawing window to be (x, y), where (0, 0) is upper left.
    
    Parameters:
    
    x - the number of pixels from the left
    
    y - the number of pixels from the top
    
    Throws:
    
    java.lang.IllegalArgumentException - if the width or height is 0 or negative
  - setDefaultCloseOperation
```
public void setDefaultCloseOperation(int value)
```
    Sets the default close operation.
    
    Parameters:
    
    value - the value, typically JFrame.EXIT_ON_CLOSE (close all windows) or JFrame.DISPOSE_ON_CLOSE (close current window)
  - setCanvasSize
```
public void setCanvasSize(int canvasWidth,
                          int canvasHeight)
```
    Sets the canvas (drawing area) to be width-by-height pixels. This also erases the current drawing and resets the coordinate system, pen radius, pen color, and font back to their default values. Ordinarly, this method is called once, at the very beginning of a program.
    
    Parameters:
    
    canvasWidth - the width as a number of pixels
    
    canvasHeight - the height as a number of pixels
    
    Throws:
    
    java.lang.IllegalArgumentException - unless both canvasWidth and canvasHeight are positive
  - setXscale
```
public void setXscale()
```
    Sets the x-scale to be the default (between 0.0 and 1.0).
  - setYscale
```
public void setYscale()
```
    Sets the y-scale to be the default (between 0.0 and 1.0).
  - setXscale
```
public void setXscale(double min,
                      double max)
```
    Sets the x-scale.
    
    Parameters:
    
    min - the minimum value of the x-scale
    
    max - the maximum value of the x-scale
  - setYscale
```
public void setYscale(double min,
                      double max)
```
    Sets the y-scale.
    
    Parameters:
    
    min - the minimum value of the y-scale
    
    max - the maximum value of the y-scale
  - clear
```
public void clear()
```
    Clears the screen to the default color (white).
  - clear
```
public void clear(java.awt.Color color)
```
    Clears the screen to the given color.
    
    Parameters:
    
    color - the color to make the background
  - getPenRadius
```
public double getPenRadius()
```
    Gets the current pen radius.
    
    Returns:
    
    the current pen radius
  - setPenRadius
```
public void setPenRadius()
```
    Sets the pen size to the default (.002).
  - setPenRadius
```
public void setPenRadius(double r)
```
    Sets the radius of the pen to the given size.
    
    Parameters:
    
    r - the radius of the pen
    
    Throws:
    
    java.lang.IllegalArgumentException - if r is negative
  - getPenColor
```
public java.awt.Color getPenColor()
```
    Gets the current pen color.
    
    Returns:
    
    the current pen color
  - setPenColor
```
public void setPenColor()
```
    Sets the pen color to the default color (black).
  - setPenColor
```
public void setPenColor(java.awt.Color color)
```
    Sets the pen color to the given color.
    
    Parameters:
    
    color - the color to make the pen
  - setPenColor
```
public void setPenColor(int red,
                        int green,
                        int blue)
```
    Sets the pen color to the given RGB color.
    
    Parameters:
    
    red - the amount of red (between 0 and 255)
    
    green - the amount of green (between 0 and 255)
    
    blue - the amount of blue (between 0 and 255)
    
    Throws:
    
    java.lang.IllegalArgumentException - if the amount of red, green, or blue are outside prescribed range
  - xorOn
```
public void xorOn()
```
    Turns on xor mode.
  - xorOff
```
public void xorOff()
```
    Turns off xor mode.
  - getJLabel
```
public javax.swing.JLabel getJLabel()
```
    Gets the current JLabel for use in some other GUI.
    
    Returns:
    
    the current JLabel
  - getFont
```
public java.awt.Font getFont()
```
    Gets the current font.
    
    Returns:
    
    the current font
  - setFont
```
public void setFont()
```
    Sets the font to the default font (sans serif, 16 point).
  - setFont
```
public void setFont(java.awt.Font font)
```
    Sets the font to the given value.
    
    Parameters:
    
    font - the font
  - line
```
public void line(double x0,
                 double y0,
                 double x1,
                 double y1)
```
    Draws a line from (x0, y0) to (x1, y1).
    
    Parameters:
    
    x0 - the x-coordinate of the starting point
    
    y0 - the y-coordinate of the starting point
    
    x1 - the x-coordinate of the destination point
    
    y1 - the y-coordinate of the destination point
  - point
```
public void point(double x,
                  double y)
```
    Draws a point at (x, y).
    
    Parameters:
    
    x - the x-coordinate of the point
    
    y - the y-coordinate of the point
  - circle
```
public void circle(double x,
                   double y,
                   double r)
```
    Draws a circle of radius r, centered on (x, y).
    
    Parameters:
    
    x - the x-coordinate of the center of the circle
    
    y - the y-coordinate of the center of the circle
    
    r - the radius of the circle
    
    Throws:
    
    java.lang.IllegalArgumentException - if the radius of the circle is negative
  - filledCircle
```
public void filledCircle(double x,
                         double y,
                         double r)
```
    Draws a filled circle of radius r, centered on (x, y).
    
    Parameters:
    
    x - the x-coordinate of the center of the circle
    
    y - the y-coordinate of the center of the circle
    
    r - the radius of the circle
    
    Throws:
    
    java.lang.IllegalArgumentException - if the radius of the circle is negative
  - ellipse
```
public void ellipse(double x,
                    double y,
                    double semiMajorAxis,
                    double semiMinorAxis)
```
    Draws an ellipse with given semimajor and semiminor axes, centered on (x, y).
    
    Parameters:
    
    x - the x-coordinate of the center of the ellipse
    
    y - the y-coordinate of the center of the ellipse
    
    semiMajorAxis - is the semimajor axis of the ellipse
    
    semiMinorAxis - is the semiminor axis of the ellipse
    
    Throws:
    
    java.lang.IllegalArgumentException - if either of the axes are negative
  - filledEllipse
```
public void filledEllipse(double x,
                          double y,
                          double semiMajorAxis,
                          double semiMinorAxis)
```
    Draws an ellipse with given semimajor and semiminor axes, centered on (x, y).
    
    Parameters:
    
    x - the x-coordinate of the center of the ellipse
    
    y - the y-coordinate of the center of the ellipse
    
    semiMajorAxis - is the semimajor axis of the ellipse
    
    semiMinorAxis - is the semiminor axis of the ellipse
    
    Throws:
    
    java.lang.IllegalArgumentException - if either of the axes are negative
  - arc
```
public void arc(double x,
                double y,
                double r,
                double angle1,
                double angle2)
```
    Draws an arc of radius r, centered on (x, y), from angle1 to angle2 (in degrees).
    
    Parameters:
    
    x - the x-coordinate of the center of the circle
    
    y - the y-coordinate of the center of the circle
    
    r - the radius of the circle
    
    angle1 - the starting angle. 0 would mean an arc beginning at 3 o'clock.
    
    angle2 - the angle at the end of the arc. For example, if you want a 90 degree arc, then angle2 should be angle1 + 90.
    
    Throws:
    
    java.lang.IllegalArgumentException - if the radius of the circle is negative
  - square
```
public void square(double x,
                   double y,
                   double r)
```
    Draws a square of side length 2r, centered on (x, y).
    
    Parameters:
    
    x - the x-coordinate of the center of the square
    
    y - the y-coordinate of the center of the square
    
    r - radius is half the length of any side of the square
    
    Throws:
    
    java.lang.IllegalArgumentException - if r is negative
  - filledSquare
```
public void filledSquare(double x,
                         double y,
                         double r)
```
    Draws a filled square of side length 2r, centered on (x, y).
    
    Parameters:
    
    x - the x-coordinate of the center of the square
    
    y - the y-coordinate of the center of the square
    
    r - radius is half the length of any side of the square
    
    Throws:
    
    java.lang.IllegalArgumentException - if r is negative
  - rectangle
```
public void rectangle(double x,
                      double y,
                      double halfWidth,
                      double halfHeight)
```
    Draws a rectangle of given half width and half height, centered on (x, y).
    
    Parameters:
    
    x - the x-coordinate of the center of the rectangle
    
    y - the y-coordinate of the center of the rectangle
    
    halfWidth - is half the width of the rectangle
    
    halfHeight - is half the height of the rectangle
    
    Throws:
    
    java.lang.IllegalArgumentException - if halfWidth or halfHeight is negative
  - filledRectangle
```
public void filledRectangle(double x,
                            double y,
                            double halfWidth,
                            double halfHeight)
```
    Draws a filled rectangle of given half width and half height, centered on (x, y).
    
    Parameters:
    
    x - the x-coordinate of the center of the rectangle
    
    y - the y-coordinate of the center of the rectangle
    
    halfWidth - is half the width of the rectangle
    
    halfHeight - is half the height of the rectangle
    
    Throws:
    
    java.lang.IllegalArgumentException - if halfWidth or halfHeight is negative
  - polygon
```
public void polygon(double[] x,
                    double[] y)
```
    Draws a polygon with the given (x[i], y[i]) coordinates.
    
    Parameters:
    
    x - an array of all the x-coordindates of the polygon
    
    y - an array of all the y-coordindates of the polygon
  - filledPolygon
```
public void filledPolygon(double[] x,
                          double[] y)
```
    Draws a filled polygon with the given (x[i], y[i]) coordinates.
    
    Parameters:
    
    x - an array of all the x-coordindates of the polygon
    
    y - an array of all the y-coordindates of the polygon
  - picture
```
public void picture(double x,
                    double y,
                    java.lang.String filename)
```
    Draws picture (gif, jpg, or png) centered on (x, y).
    
    Parameters:
    
    x - the center x-coordinate of the image
    
    y - the center y-coordinate of the image
    
    filename - the name of the image/picture, e.g., "ball.gif"
    
    Throws:
    
    java.lang.IllegalArgumentException - if the image is corrupt
    
    java.lang.IllegalArgumentException - if filename is null
  - picture
```
public void picture(double x,
                    double y,
                    java.lang.String filename,
                    double degrees)
```
    Draws picture (gif, jpg, or png) centered on (x, y), rotated given number of degrees.
    
    Parameters:
    
    x - the center x-coordinate of the image
    
    y - the center y-coordinate of the image
    
    filename - the name of the image/picture, e.g., "ball.gif"
    
    degrees - is the number of degrees to rotate counterclockwise
    
    Throws:
    
    java.lang.IllegalArgumentException - if the image is corrupt
    
    java.lang.IllegalArgumentException - if filename is null
  - picture
```
public void picture(double x,
                    double y,
                    java.lang.String filename,
                    double w,
                    double h)
```
    Draws picture (gif, jpg, or png) centered on (x, y), rescaled to w-by-h.
    
    Parameters:
    
    x - the center x coordinate of the image
    
    y - the center y coordinate of the image
    
    filename - the name of the image/picture, e.g., "ball.gif"
    
    w - the width of the image
    
    h - the height of the image
    
    Throws:
    
    java.lang.IllegalArgumentException - if the image is corrupt
    
    java.lang.IllegalArgumentException - if filename is null
  - picture
```
public void picture(double x,
                    double y,
                    java.lang.String filename,
                    double w,
                    double h,
                    double degrees)
```
    Draws picture (gif, jpg, or png) centered on (x, y), rotated given number of degrees, rescaled to w-by-h.
    
    Parameters:
    
    x - the center x-coordinate of the image
    
    y - the center y-coordinate of the image
    
    filename - the name of the image/picture, e.g., "ball.gif"
    
    w - the width of the image
    
    h - the height of the image
    
    degrees - is the number of degrees to rotate counterclockwise
    
    Throws:
    
    java.lang.IllegalArgumentException - if the image is corrupt
    
    java.lang.IllegalArgumentException - if filename is null
  - text
```
public void text(double x,
                 double y,
                 java.lang.String s)
```
    Writes the given text string in the current font, centered on (x, y).
    
    Parameters:
    
    x - the center x-coordinate of the text
    
    y - the center y-coordinate of the text
    
    s - the text
  - text
```
public void text(double x,
                 double y,
                 java.lang.String s,
                 double degrees)
```
    Writes the given text string in the current font, centered on (x, y) and rotated by the specified number of degrees.
    
    Parameters:
    
    x - the center x-coordinate of the text
    
    y - the center y-coordinate of the text
    
    s - the text
    
    degrees - is the number of degrees to rotate counterclockwise
  - textLeft
```
public void textLeft(double x,
                     double y,
                     java.lang.String s)
```
    Writes the given text string in the current font, left-aligned at (x, y).
    
    Parameters:
    
    x - the x-coordinate of the text
    
    y - the y-coordinate of the text
    
    s - the text
  - show
```
@Deprecated
public void show(int t)
```
    Deprecated. replaced by enableDoubleBuffering(), show(), and pause(int t)
    
    Copies the offscreen buffer to the onscreen buffer, pauses for t milliseconds and enables double buffering.
    
    Parameters:
    
    t - number of milliseconds
  - pause
```
public void pause(int t)
```
    Pause for t milliseconds. This method is intended to support computer animations.
    
    Parameters:
    
    t - number of milliseconds
  - show
```
public void show()
```
    Copies offscreen buffer to onscreen buffer. There is no reason to call this method unless double buffering is enabled.
  - enableDoubleBuffering
```
public void enableDoubleBuffering()
```
    Enable double buffering. All subsequent calls to drawing methods such as line(), circle(), and square() will be deffered until the next call to show(). Useful for animations.
  - disableDoubleBuffering
```
public void disableDoubleBuffering()
```
    Disable double buffering. All subsequent calls to drawing methods such as line(), circle(), and square() will be displayed on screen when called. This is the default.
  - save
```
public void save(java.lang.String filename)
```
    Saves this drawing to a file.
    
    Parameters:
    
    filename - the name of the file (with suffix png, jpg, or gif)
  - actionPerformed
```
public void actionPerformed(java.awt.event.ActionEvent e)
```
    This method cannot be called directly.
    
    Specified by:
    
    actionPerformed in interface java.awt.event.ActionListener
  - addListener
```
public void addListener(DrawListener listener)
```
    Adds a DrawListener to listen to keyboard and mouse events.
    
    Parameters:
    
    listener - the {\tt DrawListener} argument
  - isMousePressed
```
public boolean isMousePressed()
```
    Returns true if the mouse is being pressed.
    
    Returns:
    
    true if the mouse is being pressed; false otherwise
  - mousePressed
```
@Deprecated
public boolean mousePressed()
```
    Deprecated. replaced by isMousePressed()
    
    Returns true if the mouse is being pressed.
    
    Returns:
    
    true if the mouse is being pressed; false otherwise
  - mouseX
```
public double mouseX()
```
    Returns the x-coordinate of the mouse.
    
    Returns:
    
    the x-coordinate of the mouse
  - mouseY
```
public double mouseY()
```
    Returns the y-coordinate of the mouse.
    
    Returns:
    
    the y-coordinate of the mouse
  - mouseClicked
```
public void mouseClicked(java.awt.event.MouseEvent e)
```
    This method cannot be called directly.
    
    Specified by:
    
    mouseClicked in interface java.awt.event.MouseListener
  - mouseEntered
```
public void mouseEntered(java.awt.event.MouseEvent e)
```
    This method cannot be called directly.
    
    Specified by:
    
    mouseEntered in interface java.awt.event.MouseListener
  - mouseExited
```
public void mouseExited(java.awt.event.MouseEvent e)
```
    This method cannot be called directly.
    
    Specified by:
    
    mouseExited in interface java.awt.event.MouseListener
  - mousePressed
```
public void mousePressed(java.awt.event.MouseEvent e)
```
    This method cannot be called directly.
    
    Specified by:
    
    mousePressed in interface java.awt.event.MouseListener
  - mouseReleased
```
public void mouseReleased(java.awt.event.MouseEvent e)
```
    This method cannot be called directly.
    
    Specified by:
    
    mouseReleased in interface java.awt.event.MouseListener
  - mouseDragged
```
public void mouseDragged(java.awt.event.MouseEvent e)
```
    This method cannot be called directly.
    
    Specified by:
    
    mouseDragged in interface java.awt.event.MouseMotionListener
  - mouseMoved
```
public void mouseMoved(java.awt.event.MouseEvent e)
```
    This method cannot be called directly.
    
    Specified by:
    
    mouseMoved in interface java.awt.event.MouseMotionListener
  - hasNextKeyTyped
```
public boolean hasNextKeyTyped()
```
    Returns true if the user has typed a key.
    
    Returns:
    
    true if the user has typed a key; false otherwise
  - nextKeyTyped
```
public char nextKeyTyped()
```
    The next key typed by the user.
    
    Returns:
    
    the next key typed by the user
  - isKeyPressed
```
public boolean isKeyPressed(int keycode)
```
    Returns true if the keycode is being pressed.
    This method takes as an argument the keycode (corresponding to a physical key). It can handle action keys (such as F1 and arrow keys) and modifier keys (such as shift and control). See KeyEvent for a description of key codes.
    
    Parameters:
    
    keycode - the keycode to check
    
    Returns:
    
    true if keycode is currently being pressed; false otherwise
  - keyTyped
```
public void keyTyped(java.awt.event.KeyEvent e)
```
    This method cannot be called directly.
    
    Specified by:
    
    keyTyped in interface java.awt.event.KeyListener
  - keyPressed
```
public void keyPressed(java.awt.event.KeyEvent e)
```
    This method cannot be called directly.
    
    Specified by:
    
    keyPressed in interface java.awt.event.KeyListener
  - keyReleased
```
public void keyReleased(java.awt.event.KeyEvent e)
```
    This method cannot be called directly.
    
    Specified by:
    
    keyReleased in interface java.awt.event.KeyListener
  - main
```
public static void main(java.lang.String[] args)
```
    Test client.
    
    Parameters:
    
    args - the command-line arguments

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Class Draw

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

BLACK

BLUE

CYAN

DARK_GRAY

GRAY

GREEN

LIGHT_GRAY

MAGENTA

ORANGE

PINK

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WHITE

YELLOW

BOOK_BLUE

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Constructor Detail

Draw

Draw

Method Detail

setLocationOnScreen

setDefaultCloseOperation

setCanvasSize

setXscale

setYscale

setXscale

setYscale

clear

clear

getPenRadius

setPenRadius

setPenRadius

getPenColor

setPenColor

setPenColor

setPenColor

xorOn

xorOff

getJLabel

getFont

setFont

setFont

line

point

circle

filledCircle

ellipse

filledEllipse

arc

square

filledSquare

rectangle

filledRectangle

polygon

filledPolygon

picture

picture

picture

picture

text

text

textLeft

show

pause

show

enableDoubleBuffering

disableDoubleBuffering

save

actionPerformed

addListener

isMousePressed

mousePressed

mouseX