import java.awt.*;

public class AllComponents extends Frame {
	MenuBar		menubar;		// The menu bar
	Menu			file,help;		// Menu panes;
	Button			okay,cancel;		// Buttons;
	List			list;			// A list of choices
	Choice			choice;			// A menu of choices
	CheckboxGroup	checkbox_group;	// A group of button choices
	Checkbox[]		checkboxes;		// The buttons to choose from
	TextField		textfield;		// One line of text input
	TextArea		textarea;		// A text window
	ScrollableScribble	scribble;		// An area to draw in
	FileDialog		file_dialog;

	Panel			panel1,panel2;		// Sub-containers for all this stuff
	Panel			buttonpanel;

	// The layout manager for each of the containers.
	GridBagLayout gridbag = new GridBagLayout();

	public AllComponents(String title) {
		super(title);

		// Create the menu bar. Tell the frame about it.
		menubar = new MenuBar();
		this.setMenuBar(menubar);

		// Create the file menu. Add two items to it. Add to menu bar.
		file = new Menu("File");
		file.add(new MenuItem("Open"));
		file.add(new MenuItem("Quit"));
		menubar.add(file);

		// Create Help menu; add an item; add to menu bar.
		help = new Menu("Help");
		help.add(new MenuItem("About"));
		menubar.add(help);
		// Display the help menu in a  special reserved place.
		menubar.setHelpMenu(help);

		// Create pushbuttons.
		okay = new Button("Okay");
		cancel = new Button("Cancel");

		// Create a menu of choices.
		choice = new Choice();
		choice.addItem("red");
		choice.addItem("green");
		choice.addItem("blue");

		// Create checkboxes, and group them.
		checkbox_group = new CheckboxGroup();
		checkboxes = new Checkbox[3];
		checkboxes[0] = new Checkbox("vanilla",checkbox_group,false);
		checkboxes[1] = new Checkbox("chocolate",checkbox_group,false);
		checkboxes[2] = new Checkbox("strawberry",checkbox_group,false);

		// Create a list of choices.
		list = new List(4,true);
		list.addItem("Java");
		list.addItem("C");
		list.addItem("C++");
		list.addItem("Scheme");
		list.addItem("Snobol");
		list.addItem("Cobol");
		list.addItem("Assembly");

		// Create a one-line text field, and multiline text area.
		textfield = new TextField(15);
		textarea = new TextArea(6,40);
		textarea.setEditable(false);

		// Create a scrolling canvas to scribble in.
		scribble = new ScrollableScribble();

		// Create a file selection dialog box.
		file_dialog = new FileDialog(this,"Open File",FileDialog.LOAD);

		// Create a Panel to contain all the components along the
		// left-hand side of the window.  Use a GridBagLayout for it.
		panel1 = new Panel();
		panel1.setLayout(gridbag);

		// Use several versions of the constrain() convenience method
		// to add components to the panel and to specify their
		// GridBagConstraints values.
		constrain(panel1,new Label("Name:"),0,0,1,1);
		constrain(panel1,textfield,0,1,1,1);
		constrain(panel1,new Label("Favorite color:"),0,2,1,1,10,0,0,0);
		constrain(panel1,choice,0,3,1,1);
		constrain(panel1,new Label("Favorite flavor:"),0,4,1,1,10,0,0,0);
		constrain(panel1,checkboxes[0],0,5,1,1);
		constrain(panel1,checkboxes[1],0,6,1,1);
		constrain(panel1,checkboxes[2],0,7,1,1);
		constrain(panel1,new Label("Favorite languages:"),0,8,1,1,10,0,0,0);
		constrain(panel1,list,0,9,1,3,GridBagConstraints.VERTICAL,
			GridBagConstraints.NORTHWEST,0.0,1.0,0,0,0,0);

		// Create a panel for the items along the right side.
		// Use a GridBagLayout, and arrange items with constrain(), as above.
		panel2 = new Panel();
		panel2.setLayout(gridbag);

		constrain(panel2,new Label("Messages"),0,0,1,1);
		constrain(panel2,textarea,0,1,1,3,GridBagConstraints.HORIZONTAL,
			GridBagConstraints.NORTH,1.0,0.0,0,0,0,0);
		constrain(panel2,new Label("Diagram"),0,4,1,1,10,0,0,0);
		constrain(panel2,scribble,0,5,1,5,GridBagConstraints.BOTH,
			GridBagConstraints.CENTER,1.0,1.0,0,0,0,0);

		// Do the same for the buttons along the bottom.
		buttonpanel = new Panel();
		buttonpanel.setLayout(new FlowLayout());
		buttonpanel.setLayout(gridbag);
		constrain(buttonpanel,okay,0,0,1,1,GridBagConstraints.NONE,
			GridBagConstraints.CENTER,0.3,0.0,0,0,0,0);
		constrain(buttonpanel,cancel,1,0,1,1,GridBagConstraints.NONE,
			GridBagConstraints.CENTER,0.3,0.0,0,0,0,0);

		// Finally, use a GridBagLayout to arrange the panels themselves
		this.setLayout(gridbag);
		// And add the panels to the toplevel window
		constrain(this,panel1,0,0,1,1,GridBagConstraints.VERTICAL,
			GridBagConstraints.NORTHWEST,0.0,1.0,10,10,5,5);
		constrain(this,panel2,1,0,1,1,GridBagConstraints.BOTH,
			GridBagConstraints.CENTER,1.0,1.0,10,10,5,10);
		constrain(this,buttonpanel,0,1,2,1,GridBagConstraints.HORIZONTAL,
			GridBagConstraints.CENTER,1.0,0.0,5,0,0,0);
	}

	// This is the main constrain() method
	// It has arguments for all constraints.
	public void constrain(Container container, Component component,
		int grid_x,int grid_y,int grid_width,int grid_height,
		int fill, int anchor, double weight_x,double weight_y,
		int top, int left, int bottom, int right)
	{
		GridBagConstraints c = new GridBagConstraints();
		c.gridx = grid_x; c.gridy = grid_y;
		c.gridwidth = grid_width; c.gridheight = grid_height;
		c.fill = fill; c.anchor = anchor;
		c.weightx = weight_x; c.weighty = weight_y;
		if (top+bottom+left+right>0)
			c.insets = new Insets(top,left,bottom,right);

		((GridBagLayout)container.getLayout()).setConstraints(component,c);
		container.add(component);
	}

	// This version of contrain() specifies the position of a component
	// that does not grow and does not have margins.
	public void constrain(Container container, Component component,
		int grid_x, int grid_y, int grid_width, int grid_height) {

		constrain(container,component,grid_x,grid_y,
			grid_width,grid_height,GridBagConstraints.NONE,
			GridBagConstraints.NORTHWEST,0.0,0.0,0,0,0,0);
	}

	// THis version of constrain() positions a component that does
	// not grow, but does have margins.
	public void constrain(Container container, Component component,
		int grid_x,int grid_y,int grid_width,int grid_height,
		int top, int left, int bottom, int right) {

		constrain(container,component,grid_x,grid_y,
			grid_width,grid_height,GridBagConstraints.NONE,
			GridBagConstraints.NORTHWEST,
			0.0,0.0,top,left,bottom,right);
	}
}