Lab 14: Graphical User Interfaces: Mouse interaction, JPanels etc.

Part 1

Develop a Java program with the user interface displayed here. The user interacts with the user interface by entering desired dimensions in the two textFields. The user then clicks the Draw button, and finally clicks on the lower blue panel. Your software then

draws a RED rectangle //set the bottomPanel graphic's color
with the user specified dimensions at the point where the user clicked the lower panel. //need access to t1, t2 JTextFields - scoping issue to resolve
The user has to go through this process for each rectangle. //need an array of Rectangles - pick a size
//and an int to index - use modulo to prevent the index from going out of range
That is, one click on the DRAW button only allows one rectangle to be drawn. //set width and height (need these fields) at the same time "Draw" is clicked

Clicking on the EXIT button terminates the program.

Once the above task is completed,

add a menu bar to the Frame that can be used to
save the rectangles to a file using an ObjectStream. //Rectangle implements the Serializable interface
The menu can also be used to open a file for reading. //open the object file, assign to the rectangle array, process - draw each non-null rectangle in the array

Here is a partial solution.

Part 2

Declare an array of eight different Quadrilaterals, created in Lab 13. You will have to extend the Quadrilateral class with java.awt.Polygon and in each constructor add the following points:

Quadrilateral Kite Trapezoid Isoceles
Trapezoid Parallelogram Rhombus Rectangle Square

addPoint(0, 5);
addPoint(10, 0);
addPoint(20, 0);
addPoint(15, 15); npoints = 0;
addPoint(0, 7);
addPoint(7, 0);
addPoint(14, 7);
addPoint(7, 20); npoints = 0;
addPoint(0, 0);
addPoint(30, 0);
addPoint(20, 20);
addPoint(5, 20); npoints = 0;
addPoint(0, 0);
addPoint(30, 0);
addPoint(20, 20);
addPoint(10, 20); npoints = 0;
addPoint(0, 0);
addPoint(30, 0);
addPoint(35, 20);
addPoint(5, 20); npoints = 0;
addPoint(0, 0);
addPoint(30, 5);
addPoint(30, 35);
addPoint(0, 30); npoints = 0;
addPoint(0, 0);
addPoint(30, 0);
addPoint(30, 20);
addPoint(0, 20); npoints = 0;
addPoint(0, 0);
addPoint(20, 0);
addPoint(20, 20);
addPoint(0, 20);

In your DrawPad class add a method to instantiate the array of eight. Add a menu item to select a particular Quadrilateral (or draw rectangle per Part 1)and use this index to

//place quadrilateral in desired location
quad[index].translate(e.getX(), e.getY());
//draw the quadrilateral
g.drawPolygon(quad[index]);
//rezero its bounding rectangle coordinates
quad[index].translate(-(int)(quad[index].getBounds().getX()), -(int)(quad[index].getBounds().getY()));

Email your zipped project folder as an attachment.

Based on Dr. Narayan's Lab 7 , Modified by Jack Tompkins

Quadrilateral	Kite	Trapezoid	Isoceles Trapezoid	Parallelogram	Rhombus	Rectangle	Square
addPoint(0, 5); addPoint(10, 0); addPoint(20, 0); addPoint(15, 15);	npoints = 0; addPoint(0, 7); addPoint(7, 0); addPoint(14, 7); addPoint(7, 20);	npoints = 0; addPoint(0, 0); addPoint(30, 0); addPoint(20, 20); addPoint(5, 20);	npoints = 0; addPoint(0, 0); addPoint(30, 0); addPoint(20, 20); addPoint(10, 20);	npoints = 0; addPoint(0, 0); addPoint(30, 0); addPoint(35, 20); addPoint(5, 20);	npoints = 0; addPoint(0, 0); addPoint(30, 5); addPoint(30, 35); addPoint(0, 30);	npoints = 0; addPoint(0, 0); addPoint(30, 0); addPoint(30, 20); addPoint(0, 20);	npoints = 0; addPoint(0, 0); addPoint(20, 0); addPoint(20, 20); addPoint(0, 20);