See: Description
Interface | Description |
---|---|
GContainer |
Defines the functionality of an object that can serve as the parent of a
GObject . |
GFillable |
Specifies the characteristics of a graphical object that supports filling.
|
GResizable |
Specifies the characteristics of a graphical object that supports the
setSize and setBounds methods. |
GScalable |
Specifies the characteristics of a graphical object that supports the
scale method. |
Class | Description |
---|---|
G3DRect |
The
G3DRect class is used to represent a rectangle whose borders
are drawn to create a three-dimensional effect. |
GArc |
The
GArc class is a graphical object whose appearance consists
of an arc. |
GCanvas |
The
GCanvas class is a lightweight component that also serves as
a container for graphical objects. |
GCompound |
This class defines a graphical object that consists of a collection of other
graphical objects.
|
GDimension |
This class is a double-precision version of the
Dimension class
in java.awt . |
GImage |
The
GImage class is a graphical object whose appearance is
defined by an image. |
GLabel |
The
GLabel class is a graphical object whose appearance consists
of a text string. |
GLine |
The
GLine class is a graphical object whose appearance consists
of a line segment. |
GMath |
This class defines a variety of static mathematical methods that are useful
for the
acm.graphics package. |
GObject |
This class is the common superclass of all graphical objects that can be
displayed on a
GCanvas . |
GOval |
The
GOval class is a graphical object whose appearance consists
of an oval. |
GPen |
The
GPen class simulates a pen drawing on a canvas. |
GPoint |
This class is a double-precision version of the
Point class in
java.awt . |
GPolygon |
The
GPolygon class is a graphical object whose appearance
consists of a polygon. |
GRect |
The
GRect class is a graphical object whose appearance consists
of a rectangular box. |
GRectangle |
This class is a double-precision version of the
Rectangle class
in java.awt . |
GRoundRect |
The
GRoundRect class is a graphical object whose appearance
consists of a rounded rectangle. |
GTurtle |
The
GTurtle class simulates a turtle moving on a canvas. |
GCanvas
class, which is a lightweight container that
supports the addition of graphical objects that correspond to the shapes
attached to the board. These graphical objects come from a variety of classes
that represent geometrical shapes and other graphical entities including
lines, ovals, rectangles, images, and strings.
The standard approach to using the acm.graphics
package consists
of the following steps:
GCanvas
object to serve as the
surface to which subsequent graphical objects are attached.
JFrame
object and then add the
GCanvas
at the center of that frame.
add
method in GCanvas
to add
new graphical objects from the GObject
hierarchy.
As an example, the following main program follows this outline to display a red square on the screen:
public static void main(String[] args) {
GCanvas gc = new GCanvas();
JFrame frame = new JFrame();
frame.getContentPane().add(BorderLayout.CENTER, gc);
GRectangle square = new GRectangle(100, 100, 200, 200);
square.setFilled(true);
square.setColor(Color.RED);
gc.add(square);
frame.show();
}
Much of this boilerplate can be eliminated by using the
GraphicsProgram
class in the acm.program
package.