dev.roanh.convexmerger.ui

Class ComboBox<T>

java.lang.Object

dev.roanh.convexmerger.ui.ComboBox<T>

Type Parameters:

T - The value data type.

public class ComboBox<T>
extends java.lang.Object

Represents a UI combo box.

Field Summary

Fields

Modifier and Type	Field and Description
private java.awt.geom.Rectangle2D	bounds The bounds for the main field of this combo box.
private static double	CELL_HEIGHT Height of the combo box field and drop down item fields.
private java.awt.Color	color Combo box accent color.
private boolean	focus Whether this combo box currently has focus.
private java.awt.geom.Rectangle2D	list The bounds for the drop down list of this combo box.
private java.util.function.Function<T,java.lang.String>	toString The function to use to turn the values into strings.
private T	value The currently selected value.
private T[]	values The list of possible values.

Constructor Summary

Constructors

Constructor and Description
ComboBox(T[] values, java.util.function.Function<T,java.lang.String> toString, java.awt.Color color) Constructs a new combo box with the given values, to string function and accent color.

Method Summary

Modifier and Type	Method and Description
private int	getSelectedIndex(java.awt.geom.Point2D loc) Computes the drop down list selected index given the list bounds.
T	getValue() Gets the value selected in this combo box.
void	handleMouseClick(java.awt.geom.Point2D loc) Handles a mouse click on this combo box.
boolean	hasFocus() Checks if this combo box currently has focus.
protected void	render(java.awt.Graphics2D g, double x, double y, double width, double height, java.awt.geom.Point2D loc) Renders this combo box according to the given parameters.

Methods inherited from class java.lang.Object

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

Field Detail

CELL_HEIGHT

private static final double CELL_HEIGHT

Height of the combo box field and drop down item fields.

See Also:

Constant Field Values

color

private java.awt.Color color

Combo box accent color.

bounds

private java.awt.geom.Rectangle2D bounds

The bounds for the main field of this combo box.

list

private java.awt.geom.Rectangle2D list

The bounds for the drop down list of this combo box.

value

private T value

The currently selected value.

values

private T[] values

The list of possible values.

toString

private java.util.function.Function<T,java.lang.String> toString

The function to use to turn the values into strings.

focus

private boolean focus

Whether this combo box currently has focus.

Constructor Detail

ComboBox

public ComboBox(T[] values,
                java.util.function.Function<T,java.lang.String> toString,
                java.awt.Color color)

Constructs a new combo box with the given values, to string function and accent color. The first given value will be selected initially.

Parameters:

values - The values for this combo box.

toString - The function to convert the values to a string.

color - The accent color.

Method Detail

getValue

public T getValue()

Gets the value selected in this combo box.

Returns:

The selected value.

handleMouseClick

public void handleMouseClick(java.awt.geom.Point2D loc)

Handles a mouse click on this combo box.

Parameters:

loc - The location that was clicked.

hasFocus

public boolean hasFocus()

Checks if this combo box currently has focus.

Returns:

True if this combo box has focus.

getSelectedIndex

private int getSelectedIndex(java.awt.geom.Point2D loc)

Computes the drop down list selected index given the list bounds.

Parameters:

loc - The location selected.

Returns:

The selected index or -1 if none.

render

protected void render(java.awt.Graphics2D g,
                      double x,
                      double y,
                      double width,
                      double height,
                      java.awt.geom.Point2D loc)

Renders this combo box according to the given parameters.

Parameters:

g - The graphics context to use.

x - The x coordinate of the top left corner.

y - The y coordinate of the top left corner.

width - The width of the combo box.

height - The height of the main field of the combo box.

loc - The current mouse location.