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avanturin [10]
3 years ago
7

Windows on the desktop are just one of many objects used in a graphical user interface (GUI)-- buttons, drop-down list boxes, po

p-up menus, are just some of the many others. Regardless of their particular appearance, tasks, and structure, all such GUI components share some common functionality-- which is handled in a manner unique to the actual component.
Define an interface, GUIComponent, with the following methods:

onClick-- void-returning and accepts a single integer parameter
onCursorFocus -- void-returning and accepts a single integer parameter
move -- 3 overloaded methods: all boolean-returning; one accepts a pair of integer parameters; the second a single parameter of type Position; the third a single parameter of type Dimension
resize-- boolean-returning and accepts a pair of integer parameters
Computers and Technology
1 answer:
anastassius [24]3 years ago
8 0

Answer:

The GUI component is defined as follows

abstract interface GUIComponent {

public abstract void onClick(int a);

public abstract void onCursorFocus(int a);

public abstract boolean move(int a, int b);

public abstract boolean move(Position a);

public abstract boolean move(Dimension a);

public abstract boolean resize(int a, int b);

}

Explanation:

Here the first line is the definition of the interface GUIComponent with the type abstract.

The second line is the public abstract with no return onClick function for int a.

The third line is the public abstract with no return onClickFocus function for int a.

The fourth line is the public abstract with boolean return moving the cursor to int a and int b.

The fifth line is the public abstract with boolean return moving the cursor to Position a.

The sixth line is the public abstract with boolean return dimensioning the cursor to Position a.

The seventh line is the public abstract with boolean return resizing to int a and int b.

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Answer:

Key name

How to use it

Shift

Press Shift in combination with a letter to type an uppercase letter. Press Shift in combination with another key to type the symbol shown on the upper part of that key.

Caps Lock

Press Caps Lock once to type all letters as uppercase. Press Caps Lock again to turn this function off. Your keyboard might have a light indicating whether Caps Lock is on.

Tab

Press Tab to move the cursor several spaces forward. You can also press Tab to move to the next text box on a form.

Enter

Press Enter to move the cursor to the beginning of the next line. In a dialog box, press Enter to select the highlighted button.

Spacebar

Press the Spacebar to move the cursor one space forward.

Backspace

Press Backspace to delete the character before the cursor, or the selected text.

Typing (alphanumeric) keys. These keys include the same letter, number, punctuation, and symbol keys found on a traditional typewriter.

Control keys. These keys are used alone or in combination with other keys to perform certain actions. The most frequently used control keys are Ctrl, Alt, the Windows logo key  Picture of the Windows logo key, and Esc.

Function keys. The function keys are used to perform specific tasks. They are labeled as F1, F2, F3, and so on, up to F12. The functionality of these keys differs from program to program.

Navigation keys. These keys are used for moving around in documents or webpages and editing text. They include the arrow keys, Home, End, Page Up, Page Down, Delete, and Insert.

Numeric keypad. The numeric keypad is handy for entering numbers quickly. The keys are grouped together in a block like a conventional calculator or adding machine.

The following illustration shows how these keys are arranged on a typical keyboard. Your keyboard layout might be different.

Explanation:

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