Java Drawing - Main class

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		Language
	Main	H. Jyounishi, Tokyo Japan
Frame (Index), No frame version:0.3(latest)

Summary: This page describes the main class of this application.

Relevant major classes of Java SE: java.awt.*, javax.swing.*

Classes on this page:DrawMain, ObjectTable

1. Class DrawMain public class DrawMain extends JFrame

Method

Description

main

public static void main(String[] args)

Sets the following.

DrawMain drawMain=new DrawMain();
ObjectTable.main=drawMain;
drawMain.setFrame();

setFrame

void setFrame()

=>Figure1

∙ Sets window listeners to this object.

DrawWindowAdapter adaptor=new DrawWindowAdapter(this);
this.addWindowListener(adaptor);
this.addWindowFocusListener(adaptor);
this.addWindowStateListener(adaptor);

∙ Creates Command object.

new Command();

∙ Creates the MenuUtil object.

MenuUtil menuUtil=new MenuUtil();
ObjectTable.menuUtil=menuUtil;

∙ Gets the GlassPane object.

JPanel glassPane=(JPanel)this.getGlassPane();
Currently, the GlassPaneis used in the GuidancePanelclass.

∙ Create the TabbedPane, StatusPanel object and sets them to the DrawMain(JFrame).

Sets the BorderLayout to the contentPane of the DrawMain(JFrame) and add the TabbedPane and StatusPanel to the contentPane.
The StatusPanel(Figure1) is managed in the same way.
contentPane.add(tabbedPane, BorderLayout.NORTH);
contentPane.add(statusPanel, BorderLayout.SOUTH);

∙ Adds "Home", "Shape" and "Help" tabs to the TabbedPane.

∙ Creates the pop up menu.

PopupPulldownMenu.createShapePopupMenu();
PopupPulldownMenu.createGroupPopupMenu();
PopupPulldownMenu.createDrawPanelPopupMenu();

∙ Creates the DrawPanel and ListenerPanel objects.

The DrawPanel object is used to draw shapes, text and so on. The ListenerPanel is the extended class of the DrawPanel.
The KeyListener, InputMethodListener, InputMethodRequests interfaces are implemented on it for text input and the MouseListener, MouseMotionListener are also implemented on it for drawing operation.

∙ Creates the JScrollPane object and adds it to the contentPane of the DrawMain(JFrame)..

contentPane.add(scrollPane, BorderLayout.CENTER);
Sets the JViewport to the JScrollPane and sets a view(viewPanel) to the JViewport.
JPanel viewPanel=ViewUtil.getFramePanel(drawPanel);
viewport.setView(viewPanel);
scrollPane.setViewport(viewport);

∙ viewPanel

The viewPanel is the gray part in Figure1. Without the viewPanel , the DrawPanel is placed at the left end of the viewport.

∙ Creates the following major objects and registers them to the ObjectTable.

ContainerManager, UndoDrawManager, MousePositionLS, SelectionLS, FileIo, Edit, ViewUtil, ExecCommand, ExecPopupMenu etc.

Figure1 Configulation of the DrawMain(JFrame)

2. Class DrawWindowAdapter return=>page top

class DrawWindowAdapter extends WindowAdapter

This class is implemented to avoid the problem of overwriting the drawings on the JTabbedPane, the tool bar and other components when the view is scrolled. I don't know the reason, however repainting the window (or frame) seems to avoid this problem.

Figure2 The problem of overwriting

Field

Description

window

Window window

The Window (DrawMain) object.

Method	Description
Constructor	DrawWindowAdapter(Window window)
windowActivated	public void windowActivated(WindowEvent e) Calls the repaint method of the Window.
windowGainedFocus	public void windowGainedFocus(WindowEvent e) Calls the repaint method of the Window.
windowLostFocus	public void windowLostFocus(WindowEvent e) Calls the repaint method of the Window.

2. Class ObjectTable return=>page top

Registers the frequently referred objects to the static fields of this object.

Field	Description
main	protected static DrawMain main The DrawMain object.
tabbedPane	protected static JTabbedPane tabbedPane The JTabbedPane object.
glassPane	protected static JPanel glassPane The GlassPane object.
drawPanel	protected static DrawPanel drawPanel The DrawPanel object.
listenerPanel	protected static ListenerPanel listenerPanel ListenerPanel object.
guidancePanel	protected static GuidancePanel guidancePanel GuidancePanel object.
statusPanel	protected static StatusPanel statusPanel StatusPanel object.
scrollPane	protected static JScrollPane scrollPane JScrollPane object.
viewport	protected static JViewport viewport JViewport object.
pageManager	public static PageManager pageManager PageManager object.
containerManager	protected static ContainerManager containerManager ContainerManager object.
execCommand	protected static ExecCommand execCommand ExecCommand object.
execPopupMenu	protected static ExecPopupMenu execPopupMenu ExecPopupMenu object.
selectionLS	protected static SelectionLS selectionLS SelectionLS object.
mousePositionLS	protected static MousePositionLS mousePositionLS MousePositionLS object.
menuUtil	protected static MenuUtil menuUtil MenuUtil object.
undoDrawManager	public static UndoDrawManager undoDrawManager UndoDrawManager object.
fileIo	protected static FileIo fileIo FileIo object.
edit	protected static Edit edit Edit object.
viewUtil	protected static ViewUtil viewUtil ViewUtil object.

Field

Description

getXXXX

public static XXXX getXXXX()

Returns the XXXX object.