Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN: 9780133594140
Author: James Kurose, Keith Ross
Publisher: PEARSON
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Part 2: Write JavaFX a program that allows a user to move Move a rectangle a rectangle using mouse. The program should display a rectangle and allow a user to point the mouse inside the rectangle and drag the rectangle wherever the mouse goes. So the mouse point becomes the center of the rectangle. Page 1 of 4
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Transcribed Image Text:Part 2: Write JavaFX a program that allows a user to move Move a rectangle a rectangle using mouse. The program should display a rectangle and allow a user to point the mouse inside the rectangle and drag the rectangle wherever the mouse goes. So the mouse point becomes the center of the rectangle. Page 1 of 4
Lab 10 ITDR2104 - Programming Discuss: 1. Which of the following registration methods can you use to register an EventHandler by the rectangie object? setOnMouseDragged, setOnMouseMoved, setOnMouseReleased or setOnMousePressed 2. How can you check whether the mouse pointer inside the rectangle or not? Is using contains method in the Rectangle class would help you? How can you use contains method? 3. How can you get the mouse pointer's x and y coordinates? Is using the MouseEvent object's getX() and getY() methods would help you? 4. How can you update the x and y coordinates of the rectangle object? Is using the Rectangle class setX() and setY() methods would help you? 5. How can you get the new x and y coordinates of the rectangle object which should be equal to the new position of the mouse pointer (MouseEvent object)? The x and y coordinates of the rectangle center can be obtained using x= rectangle.getWidth() / 2 y = rectangle.getHeight() / 2 But you need the new x and y coordinates of the rectangle which depend on the new position of the mouse pointer (the MouseEvent object e). How can you get the new x and y coordinates of the rectangle? newx = (e.getX() - rectangle.getWidth() ) / 2 newY = (e.getY() - rectangle.getHeight()) / 2 Part of the UML class diagram of MouseEvent class are given below. javafs.scene.input.MouseEvent +getButton(): MouseButton Indicates which mouse button has bcen clicked. +getClickCount (): int Returns the number of mouse clicks associaled with this event. +getX(): double +getYO: double +getSceneX): double +getSceneYO: double +getScreenX(): double +getScreenY): double +isAl tDown): boolean Returns the x-coordinate of the mouse point in the event source node. Returns the y-coordinate of the mouse point in the event source node. Returns the a-coordinate of the mouse point in the secne. Returns the y-coordinate of the mouse point in the soene. Returns the x-coordinate of the mouse point in the screen. Returns the y-coordinate of the mouse point in the screen. Returns true if the Alt key is pressed on this event. Returns true if the Control key is pressed on this event. Returns true if the mouse Meta button is pressed on this event. Returns true if the Shift key is pressed on this event. +isControlDown(): boolean +isMetaDown (): boolean +isShiftDown (O: boolean
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Transcribed Image Text:Lab 10 ITDR2104 - Programming Discuss: 1. Which of the following registration methods can you use to register an EventHandler by the rectangie object? setOnMouseDragged, setOnMouseMoved, setOnMouseReleased or setOnMousePressed 2. How can you check whether the mouse pointer inside the rectangle or not? Is using contains method in the Rectangle class would help you? How can you use contains method? 3. How can you get the mouse pointer's x and y coordinates? Is using the MouseEvent object's getX() and getY() methods would help you? 4. How can you update the x and y coordinates of the rectangle object? Is using the Rectangle class setX() and setY() methods would help you? 5. How can you get the new x and y coordinates of the rectangle object which should be equal to the new position of the mouse pointer (MouseEvent object)? The x and y coordinates of the rectangle center can be obtained using x= rectangle.getWidth() / 2 y = rectangle.getHeight() / 2 But you need the new x and y coordinates of the rectangle which depend on the new position of the mouse pointer (the MouseEvent object e). How can you get the new x and y coordinates of the rectangle? newx = (e.getX() - rectangle.getWidth() ) / 2 newY = (e.getY() - rectangle.getHeight()) / 2 Part of the UML class diagram of MouseEvent class are given below. javafs.scene.input.MouseEvent +getButton(): MouseButton Indicates which mouse button has bcen clicked. +getClickCount (): int Returns the number of mouse clicks associaled with this event. +getX(): double +getYO: double +getSceneX): double +getSceneYO: double +getScreenX(): double +getScreenY): double +isAl tDown): boolean Returns the x-coordinate of the mouse point in the event source node. Returns the y-coordinate of the mouse point in the event source node. Returns the a-coordinate of the mouse point in the secne. Returns the y-coordinate of the mouse point in the soene. Returns the x-coordinate of the mouse point in the screen. Returns the y-coordinate of the mouse point in the screen. Returns true if the Alt key is pressed on this event. Returns true if the Control key is pressed on this event. Returns true if the mouse Meta button is pressed on this event. Returns true if the Shift key is pressed on this event. +isControlDown(): boolean +isMetaDown (): boolean +isShiftDown (O: boolean
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