Chapter 21, Problem 7PP

Program Plan Intro

  To implement a graphical application to add shapes at mouse click location

Program plan:

• In the file “GraphData.java”, import necessary packages, and create a class “GraphData”,
  • Declare an “ArrayList”.
  • Define default constructor.
  • Define a method to set the shape.
  • Define a method to return the size of the array list.
  • Define a method to get a graph shape.
• In the file “GraphShape.java”, import necessary packages, and create a class “GraphShape”,
  • Define the constructor.
  • Declare a method “draw()” to draw the shape.
  • Declare a method “getColor()” to get the color.
• In the file “LineShape.java”, import necessary packages, and create a class “LineShape”,
  • Define the constructor.
  • Define a method “draw()” to draw the line.
• In the file “EllipseShape.java”, import necessary packages, and create a class “EllipseShape”,
  • Define the constructor.
  • Define a method “draw()” to draw the ellipse.
• In the file “RectangleShape.java”, import necessary packages, and create a class “RectangleShape”,
  • Define the constructor.
  • Define a method “draw()” to draw the rectangle.
• In the file “GraphPanel.java”, import necessary packages, and create a class “GraphPanel”,
  • Define the constructor.
  • Define a method “paintComponent()” to draw the line.
  • Define a method “addShape()” to add a shape to the list.
  • Define a method “getGraphData()” to get the graph data.
  • Define a method “setGraphData()” to set the graph data.
• In the file “GraphicsEditorFrame.java”, import necessary packages, and create a class “GraphicsEditorFrame” that create a graphics editor frame to hold all the component,
• In the file “GraphicsEditorViewer.java”, create a class “GraphicsEditorViewer”,
  • Define the “main()” method,
    • Create an object for “ThreeColorsFrame”.
    • Set the fame to exit on close.
    • Set the frame’s title.
    • Make the frame visible.