java.lang.Object
- prezoom.controller.GObjectManager

```
public class GObjectManager
extends Object
```
The manager that manages all the graphical objects on the canvas.

Author:

Zhijie Lan
create date: 2020/11/15

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`private static class`	`GObjectManager.MouseDispatcher`	the listener to dispatch the mouse event to the canvas in the presentation mode, so that the text area will not intercept the user input

Field Summary

Fields
Modifier and Type	Field	Description
`static GObject`	`draggedObj`	the object that is being dragged on the canvas
`static Color`	`drawingColor`	the color of the new shape
`static boolean`	`drawingFilled`	whether the new shape is filled
`static int`	`drawingLineWidth`	the line width of the new shape
`static GObject`	`drawingObj`	the new object that is created by drawing
`static String`	`drawingType`	the type of the new shape, empty when not drawing
`protected static ArrayList<GObject>`	`gObjectList`	the array list that holds all the GObject
`static GObject`	`inspectedObj`	the selected object that is showed on the inspector panel
`private static GObjectManager.MouseDispatcher`	`mouseDispatcher`	the listener to dispatch the mouse event to the canvas in the presentation mode, so that the text area will not intercept the user input
`static GObject`	`resizedObj`	the object that is being resized
`static GObject`	`resizePointObj`	the object that shows the resize point
`private static Rectangle2D[]`	`resizeRecs`	the small rectangles on the diagonal of the shapes, used to resize the shapes
`static Point2D`	`selectedResizePoint`	the selected resize rectangle
`static Point2D`	`unselectedResizePoint`	another resize rectangle, fixed when resizing

Constructor Summary

Constructors
Constructor Description

GObjectManager()

Method Summary

Modifier and Type	Method	Description
`static void`	`addGObject(GObject obj)`	add a graphical object to the canvas
`static void`	`addImageObject(BufferedImage image)`	add a Image
`static void`	`addTextArea(GText textObj)`	add a JTextArea component to the list and center canvas
`static void`	`addTextComponentToPresenter(CenterCanvas presentCanvas)`	when start presenting, add all text areas components to the present canvas, and set the text areas being not editable and focusable
`static void`	`deleteAllTextArea()`	transverse all GObjects, and delete all JTextAreas to the canvas
`static void`	`deleteGObject(GObject obj)`	delete an object.
`static void`	`deleteStateToGObjects(int state)`	call the objects' attribute manager to delete a given state
`static void`	`deleteTextArea(GText textObj)`	remove a JTextArea from the canvas
`static void`	`drawAll(Graphics2D g2)`	draw all the objects on canvas
`static void`	`drawResizePoints(Graphics2D g2)`	to draw two small rectangle on the diagonal of shapes, let the shapes resizable by dragging those points.
`static GObject`	`findSelected(double x, double y)`	find if the given x,y select an object
`static GObject`	`findSelected(Point2D point2D)`	find if the given x,y select an object
`static void`	`finishDrawingNew()`	finishing drawing the new objects
`static Rectangle2D`	`getResizableRec(double x, double y)`	find if the given x,y select a resize point
`static Rectangle2D`	`getResizableRec(Point2D point)`	find if the given x,y select a resize point
`static void`	`insertStateToGObjects()`	call the objects' attribute manager to insert a state to all objects
`static void`	`reloadAllTextArea()`	transverse all GObjects, and add all JTextAreas to the canvas
`static void`	`resetTextComponentToCanvas()`	when finishing presenting, reset all text areas back to the edit canvas
`static void`	`updateAllObject()`	call the objects' attribute manager to update all their attributes
`static void`	`updateResizablePoint(double x, double y)`	draw two resize point to the object located at the given x, y
`static void`	`updateResizablePoint(Point2D point)`	draw two resize point to the object located at the given x, y
`static GObject`	`updateResizing(Point2D start, Point2D current, GObject obj, String type)`	when dragging mouse to resize shapes, use this function to update the shape to have dynamic resizing effect

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - draggedObj
```
public static GObject draggedObj
```
    the object that is being dragged on the canvas
  - inspectedObj
```
public static GObject inspectedObj
```
    the selected object that is showed on the inspector panel
  - resizedObj
```
public static GObject resizedObj
```
    the object that is being resized
  - resizePointObj
```
public static GObject resizePointObj
```
    the object that shows the resize point
  - resizeRecs
```
private static Rectangle2D[] resizeRecs
```
    the small rectangles on the diagonal of the shapes, used to resize the shapes
  - selectedResizePoint
```
public static Point2D selectedResizePoint
```
    the selected resize rectangle
  - unselectedResizePoint
```
public static Point2D unselectedResizePoint
```
    another resize rectangle, fixed when resizing
  - drawingObj
```
public static GObject drawingObj
```
    the new object that is created by drawing
  - drawingType
```
public static String drawingType
```
    the type of the new shape, empty when not drawing
  - drawingColor
```
public static Color drawingColor
```
    the color of the new shape
  - drawingLineWidth
```
public static int drawingLineWidth
```
    the line width of the new shape
  - drawingFilled
```
public static boolean drawingFilled
```
    whether the new shape is filled
  - gObjectList
```
protected static ArrayList<GObject> gObjectList
```
    the array list that holds all the GObject
  - mouseDispatcher
```
private static final GObjectManager.MouseDispatcher mouseDispatcher
```
    the listener to dispatch the mouse event to the canvas in the presentation mode, so that the text area will not intercept the user input
- Constructor Detail
  - GObjectManager
```
public GObjectManager()
```
- Method Detail
  - drawAll
```
public static void drawAll(Graphics2D g2)
```
    draw all the objects on canvas
    
    Parameters:
    
    g2 - graphics to paint
  - updateResizing
```
public static GObject updateResizing(Point2D start,
                                     Point2D current,
                                     GObject obj,
                                     String type)
```
    when dragging mouse to resize shapes, use this function to update the shape to have dynamic resizing effect
    
    Parameters:
    
    start - the start point of new shapes
    
    current - the current point of the cursor
    
    obj - the object to be resized
    
    type - the type of resized object
    
    Returns:
    
    the resized GObject
  - finishDrawingNew
```
public static void finishDrawingNew()
```
    finishing drawing the new objects
  - addImageObject
```
public static void addImageObject(BufferedImage image)
```
    add a Image
    
    Parameters:
    
    image - the image source
  - drawResizePoints
```
public static void drawResizePoints(Graphics2D g2)
```
    to draw two small rectangle on the diagonal of shapes, let the shapes resizable by dragging those points.
    
    Parameters:
    
    g2 - the graphics to paint
  - getResizableRec
```
public static Rectangle2D getResizableRec(double x,
                                          double y)
```
    find if the given x,y select a resize point
    
    Parameters:
    
    x - x
    
    y - y
    
    Returns:
    
    the selected rec, null if no rec is selected
  - getResizableRec
```
public static Rectangle2D getResizableRec(Point2D point)
```
    find if the given x,y select a resize point
    
    Parameters:
    
    point - point
    
    Returns:
    
    the selected rec, null if no rec is selected
  - updateResizablePoint
```
public static void updateResizablePoint(double x,
                                        double y)
```
    draw two resize point to the object located at the given x, y
    
    Parameters:
    
    x - x location
    
    y - y location
  - updateResizablePoint
```
public static void updateResizablePoint(Point2D point)
```
    draw two resize point to the object located at the given x, y
    
    Parameters:
    
    point - location
  - findSelected
```
public static GObject findSelected(double x,
                                   double y)
```
    find if the given x,y select an object
    
    Parameters:
    
    x - x
    
    y - y
    
    Returns:
    
    the selected object, null if no selected
  - findSelected
```
public static GObject findSelected(Point2D point2D)
```
    find if the given x,y select an object
    
    Parameters:
    
    point2D - the point
    
    Returns:
    
    the selected object, null if no selected
  - updateAllObject
```
public static void updateAllObject()
```
    call the objects' attribute manager to update all their attributes
  - insertStateToGObjects
```
public static void insertStateToGObjects()
```
    call the objects' attribute manager to insert a state to all objects
  - deleteStateToGObjects
```
public static void deleteStateToGObjects(int state)
```
    call the objects' attribute manager to delete a given state
    
    Parameters:
    
    state - the state to delete
  - addGObject
```
public static void addGObject(GObject obj)
```
    add a graphical object to the canvas
    
    Parameters:
    
    obj - the object to add
  - addTextArea
```
public static void addTextArea(GText textObj)
```
    add a JTextArea component to the list and center canvas
    
    Parameters:
    
    textObj - the GText object that holds the JTextArea
  - deleteTextArea
```
public static void deleteTextArea(GText textObj)
```
    remove a JTextArea from the canvas
    
    Parameters:
    
    textObj - the GText object to be deleted
  - deleteGObject
```
public static void deleteGObject(GObject obj)
```
    delete an object. If the object is a text box, delete the text area as well
    
    Parameters:
    
    obj - the object to be deleted
  - reloadAllTextArea
```
public static void reloadAllTextArea()
```
    transverse all GObjects, and add all JTextAreas to the canvas
  - deleteAllTextArea
```
public static void deleteAllTextArea()
```
    transverse all GObjects, and delete all JTextAreas to the canvas
  - addTextComponentToPresenter
```
public static void addTextComponentToPresenter(CenterCanvas presentCanvas)
```
    when start presenting, add all text areas components to the present canvas, and set the text areas being not editable and focusable
    
    Parameters:
    
    presentCanvas - the present canvas
  - resetTextComponentToCanvas
```
public static void resetTextComponentToCanvas()
```
    when finishing presenting, reset all text areas back to the edit canvas

Class GObjectManager

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

draggedObj

inspectedObj

resizedObj

resizePointObj

resizeRecs

selectedResizePoint

unselectedResizePoint

drawingObj

drawingType

drawingColor

drawingLineWidth

drawingFilled

gObjectList

mouseDispatcher

Constructor Detail

GObjectManager

Method Detail

drawAll

updateResizing

finishDrawingNew

addImageObject

drawResizePoints

getResizableRec

getResizableRec

updateResizablePoint

updateResizablePoint

findSelected

findSelected

updateAllObject

insertStateToGObjects

deleteStateToGObjects

addGObject

addTextArea

deleteTextArea

deleteGObject

reloadAllTextArea

deleteAllTextArea

addTextComponentToPresenter

resetTextComponentToCanvas