CS Bridge | Graphics

Here are the most common graphics commands:

Some other helpful graphics commands:


						getWidth(); // returns the width of the screen. 

						getHeight(); // returns the height of the screen.

						add(object); // adds an object to the screen.

                        add(object, x, y); // adds an object to the screen at coordinates (x, y).

						remove(object); // removes an object from the screen.

						getElementAt(x, y); // returns the element at (x, y).

Full documentation:
http://cs.stanford.edu/people/eroberts/jtf/javadoc/student/index.html

GLabel

Recall that setLocation(x,y) sets the origin of a GRect, GOval, or GLine to the coordinates (x,y), where the origin is defined as the top-left corner. GLabel has the same definition of origin, but the height is defined a bit taller than the actual text height. Here is a detailed look at all the different height definitions for GLabel:

Side note: The origin is the middle-left in the image above, because we are dealing with a multi-line GLabel. For GLabels with single lines, the origin is the top-left.

So to center a GLabel vertically, we would actually use the ascent of a GLabel:


                        double y = getHeight()/2 + label.getAscent()/2;

GImage

You can also upload your own images and add them to your graphics program!

A few tips:

Save your image to the same "src" (source) folder that contains your java file.
Find where your java file is located by going to Eclipse, right-clicking on the java file in Project Explorer (the left-hand menu), and going to "Properties."
If you are still having errors, make sure you can see the image file in Eclipse. Refresh the project (right-click the project folder in Eclipse and select "Refresh").

Graphics Reference

GLabel

GImage