Dated: April 16, 2001

AWT contains numerous classes and methods that allow you to create and manage windows.

Main purpose to support applet windows, can also be used to create stand alone windows that run in a GUI environment such as Windows.

AWTEvent

AWTEventMulticaster

BorderLayout

Button

Canvas

CardLayout

Checkbox

CheckboxGroup

CheckboxMenuItem

Choice

Color

Component

Container

Cursor

Dialog

Dimension

Event

EventQueue

FileDialog

FlowLayout

Font

FontMetrics

Frame

Graphics

GraphicsDevice

GraphicsEnvironment

GridBagConstraints

GridBagLayout

GridLayout

Image

Insets

Label

List

MediaTracker

Menu

MenuBar

MenuComponent

MenuItem

MenuShortcut

Panel

Point

Polygon

PopupMenu

PrintJob

Rectangle

Scrollbar

ScrollPane

SystemColor

TextArea

TextComponent

TextField

Toolkit

Window

The AWT defines windows according to a class hierarchy that adds functionality and specificity with each level.

At top of AWT hierarchy

Is an abstract class that encapsulates all attributes of a visual component.

All user interface elements displayed on the screen and interacting with the user are subclasses of Component

A Component object is responsible for remembering the current foreground and background colors and the currently selected text font.

Subclass of Component

Additional methods that allow other Component objects to be nested in it.

Other Container objects can be stored inside a Container (since they are themselves instances of Component). This makes for a multi-level containment system.

Responsible for laying out(positioning) any component that it contains.

Concrete subclass of Container

Does not add any new methods, simply implements Container

May be thought of as a recursively nestable concrete screen component

Superclass for Applet

When screen output is directed to an Applet, it is drawn on a surface of a Panel object.

Window that does not contain a title bar, menu bar, or border.

Window class creates a Top-level window.

Is not contained with in any other object.

Encapsulates what is commonly thought of as a "window".

Subclass of window,has a title bar, menu bar, borders and resizing corners.

If created within an Applet, contains waring message to user. "Warning: Applet Window"

***Remember: Graphics Context

public void paint(Graphics g){

g.drawLine(0,0,100,100);

}

void drawLine (int startX, int startY, int endX, int endY)

void drawRect (int top, int left, int width, int height)

void fillRect (int top, int left, int width, int height)

void drawRoundRect (int top, int left, int width, int height, int xDiam, int yDiam)

void fillRoundRect (int top, int left, int width, int height, int xDiam, int yDiam)

void drawOval (int top, int left, int width, int height)

void fillOval (int top, int left, int width, int height)

void drawArc(int top, int left, int width, int height, int startAngle, int sweepAngle)

void fillArc(int top, int left, int width, int height, int startAngle, int sweepAngle)

The arc is bounded by a rectangle ____________.

The arc is drawn from startAngle through the angular distance specified by sweepAngle.

Angles specified in degrees.

Zero Degrees in on the horizontal, as at 3 o’ clock.Arc drawn counterclockwise if sweepAngle is positive and clockwise if sweepAngle is negative.

void drawPolygon (int x[], int y[], int numPoints)

void fillPolygon (int x[], int y[], int numPoints)

Dimension getSize()

void setSize(Dimension d)

Java supports color in a portable, device-independent fashion.

Color (int red, int green, int blue)

Color (int rgbValue) //int rgbValue = (0xff000000 | (0xc0<<16) | (0x00 <<8) | 0x00);

Color (float red, float green, float blue)

Using Hue, Saturation, and Brightness

hue is wheel of color, value between 0.0 to 1.0

saturation is light pastels to intense hues, value between 0.0 to 1.0

brightness: 1 is bright white and 0 is black, value between 0.0 to 1.0

static int HSBtoRGB (float hue, float saturation, float brightness)

static float[] RGBtoHSB (int red, int green, int blue, float values[])

If values is not null, then this array is given the HSB values and returned. Otherwise, a new array is created and the HSB values are returned in it.

int getRed()

int getGreen()

int getBlue()

int getRGB()

void setColor(Color newColor) // in Graphics

Color getColor()

Determines how objects are drawn in a window. By default, new output to a window overwrites any preexisting contents.

void setXORMode (Color xorColor)

To return to overwrite mode,

void setPaintMode()

The cross hairs are XORed onto the window and are always visible, no matter what the underlying color is.

public void paint (Graphics g) {

g. drawLine ( 0,0,100,100);

g. drawLine (0,100,100,0);

g.setColor (Color.blue);

g.drawLine (40,25,250,180);

g.drawLine (75,90,400,400);

g.setColor (Color.green);

g.drawRect (10,10,60,50);

g.fillRect (100,10,60,50);

g.setColor (Color.red);

g.drawRoundRect (190,10,60,50,15,15);

g.fillRoundRect (70,90,140,100,30,40);

g.setColor (Color.cyan);

g.drawLine(20,150,400,40);

g.drawLine(5,290,80,19);

//xor cross hairs

g.setXORMode(Color.black);

g.drawLine(90,100,110,100);

g.drawLine(100,90,100,110);

g.setPaintMode();

}

AWT supports multiple type fonts.

Beginning with Java 2, fonts have a family name, a logical font name, and a face name. The family name is the general name of the font such as Courier. The logical name specifies a category such as monospaced. The face name specifies a specific font such as Courier Italic.

Determining the available Fonts

Use the getAvailableFontFamilyNames() method defined by the GraphicsEnvironment class.

String[] getAvailableFontFamilyNames ()

Font[] getAllFonts ()

GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();

String FontList [];

FontList = ge.getAvailableFontFamilyNames ();

Font(String fontName, int fontStyle, int pointSize)

FontName specifies name of desired Font, Logical or Face Name can be used

FontStyle specifies style of the Font like, Font.PLAIN, Font.BOLD, Font.ITALIC.

Combine styles like Font.BOLD|Font.ITALIC

Font getFont()

void setFont(Font fontObj)

eg. Font f = new Font ("Dialog", Font.PLAIN, 12);

setFont(f);