dbrown
Class RTGraphicView

java.lang.Object
  java.awt.Component
      java.awt.Container
          javax.swing.JComponent
              dbrown.RTGraphicView

All Implemented Interfaces:

IView, java.awt.image.ImageObserver, java.awt.MenuContainer, java.io.Serializable

public class RTGraphicView
extends javax.swing.JComponent
implements IView

Displays a right triangle as a graphic within a JComponent with a blank border of size BORDER. The upper right corner of the triangle can be selected and used to change the size of the triangle by clicking and dragging with with mouse.

Version:

2006-11-01

Author:

David Brown from Byron Weber-Becker

See Also:

Serialized Form

Nested Class Summary

private class	RTGraphicView.MListener Inner class the allows the right triangle to be selected or deselected.
private class	RTGraphicView.MMListener Inner class for allowing the triangle to be dragged in order to change its size.

Nested classes/interfaces inherited from class javax.swing.JComponent

javax.swing.JComponent.AccessibleJComponent

Nested classes/interfaces inherited from class java.awt.Container

java.awt.Container.AccessibleAWTContainer

Nested classes/interfaces inherited from class java.awt.Component

java.awt.Component.AccessibleAWTComponent, java.awt.Component.BltBufferStrategy, java.awt.Component.FlipBufferStrategy

Field Summary

static int	BORDER The default blank border size.
private RTModel	model The right triangle model.
private double	scale How much should the triangle be scaled?
private boolean	selected Did the user select the triangle to resize it?

Fields inherited from class javax.swing.JComponent

accessibleContext, listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW

Fields inherited from class java.awt.Component

BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

Fields inherited from interface java.awt.image.ImageObserver

ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH

Constructor Summary

RTGraphicView(RTModel newModel)
The View constructor.

Method Summary

private void	drawHandle(java.awt.Graphics g, int top, int left, int bottom, int right) Draw handles for resizing the triangle.
private void	drawTriangle(java.awt.Graphics g, int top, int left, int bottom, int right) Draw the triangle.
protected double	fromX(int x) Convert from the component's X coordinate to the model's X coordinate.
protected double	fromY(int y) Convert from the component's Y coordinate to the model's Y coordinate.
private void	layoutView() Empty method: the JComponent contains no further elements.
private boolean	onTopCorner(int x, int y) Determines if mouse is on the top corner of the triangle.
void	paintComponent(java.awt.Graphics g) Overrides JComponent's paintComponent method.
private void	registerListeners() Adds the mouse listeners to the JComponent.
protected int	toX(double modelX) Convert from the model's X coordinate to the component's X coordinate.
protected int	toY(double modelY) Convert from the model's Y coordinate to the component's Y coordinate.
void	updateView() All views that implement this class must have an updateView method.

Methods inherited from class javax.swing.JComponent

addAncestorListener, addNotify, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, firePropertyChange, firePropertyChange, firePropertyChange, fireVetoableChange, getAccessibleContext, getActionForKeyStroke, getActionMap, getAlignmentX, getAlignmentY, getAncestorListeners, getAutoscrolls, getBorder, getBounds, getClientProperty, getComponentGraphics, getComponentPopupMenu, getConditionForKeyStroke, getDebugGraphicsOptions, getDefaultLocale, getFontMetrics, getGraphics, getHeight, getInheritsPopupMenu, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getMaximumSize, getMinimumSize, getNextFocusableComponent, getPopupLocation, getPreferredSize, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getTransferHandler, getUIClassID, getVerifyInputWhenFocusTarget, getVetoableChangeListeners, getVisibleRect, getWidth, getX, getY, grabFocus, isDoubleBuffered, isLightweightComponent, isManagingFocus, isOpaque, isOptimizedDrawingEnabled, isPaintingTile, isRequestFocusEnabled, isValidateRoot, paint, paintBorder, paintChildren, paintImmediately, paintImmediately, paramString, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processKeyBinding, processKeyEvent, processMouseEvent, processMouseMotionEvent, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeNotify, removeVetoableChangeListener, repaint, repaint, requestDefaultFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, resetKeyboardActions, reshape, revalidate, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setBorder, setComponentPopupMenu, setDebugGraphicsOptions, setDefaultLocale, setDoubleBuffered, setEnabled, setFocusTraversalKeys, setFont, setForeground, setInheritsPopupMenu, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setUI, setVerifyInputWhenFocusTarget, setVisible, unregisterKeyboardAction, update, updateUI

Methods inherited from class java.awt.Container

add, add, add, add, add, addContainerListener, addImpl, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getComponentZOrder, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getLayout, getMousePosition, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicyProvider, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, setComponentZOrder, setFocusCycleRoot, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, setLayout, transferFocusBackward, transferFocusDownCycle, validate, validateTree

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, coalesceEvents, contains, createImage, createImage, createVolatileImage, createVolatileImage, disableEvents, dispatchEvent, enable, enableEvents, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getBackground, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getForeground, getGraphicsConfiguration, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocale, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPeer, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hasFocus, hide, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isMaximumSizeSet, isMinimumSizeSet, isPreferredSizeSet, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setName, setSize, setSize, show, show, size, toString, transferFocus, transferFocusUpCycle

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

BORDER

public static final int BORDER

The default blank border size.

See Also:

Constant Field Values

model

private RTModel model

The right triangle model.

scale

private double scale

How much should the triangle be scaled?

selected

private boolean selected

Did the user select the triangle to resize it?

Constructor Detail

RTGraphicView

public RTGraphicView(RTModel newModel)

The View constructor.

Parameters:

newModel -

Method Detail

drawHandle

private void drawHandle(java.awt.Graphics g,
                        int top,
                        int left,
                        int bottom,
                        int right)

Draw handles for resizing the triangle.

Parameters:

g -

top -

left -

bottom -

right -

drawTriangle

private void drawTriangle(java.awt.Graphics g,
                          int top,
                          int left,
                          int bottom,
                          int right)

Draw the triangle.

Parameters:

g -

top -

left -

bottom -

right -

fromX

protected double fromX(int x)

Convert from the component's X coordinate to the model's X coordinate.

Parameters:

x -

Returns:

the model's X coordinate.

fromY

protected double fromY(int y)

Convert from the component's Y coordinate to the model's Y coordinate.

Parameters:

y -

Returns:

the model's y coordinate

layoutView

private void layoutView()

Empty method: the JComponent contains no further elements.

onTopCorner

private boolean onTopCorner(int x,
                            int y)

Determines if mouse is on the top corner of the triangle.

Parameters:

x -

y -

Returns:

whether the mouse is on the top corner of the triangle.

paintComponent

public void paintComponent(java.awt.Graphics g)

Overrides JComponent's paintComponent method. Draws the triangle and adds a handle to the top corner of the triangle if the triangle has been selected.

Overrides:

paintComponent in class javax.swing.JComponent

See Also:

JComponent.paintComponent(java.awt.Graphics)

registerListeners

private void registerListeners()

Adds the mouse listeners to the JComponent.

toX

protected int toX(double modelX)

Convert from the model's X coordinate to the component's X coordinate.

Parameters:

modelX - the model's X coordinate

Returns:

the component's X coordinate

toY

protected int toY(double modelY)

Convert from the model's Y coordinate to the component's Y coordinate.

Parameters:

modelY - the model's Y coordinate

Returns:

the component's Y coordinate

updateView

public void updateView()

Description copied from interface: IView

All views that implement this class must have an updateView method. (All methods in an interface are actually abstract by default.)

Specified by:

updateView in interface IView