Package jltk.gui

Class Control

java.lang.Object

jltk.Component

jltk.gui.Control

Direct Known Subclasses:

ComboBox, Image, Labeled, ListView, ProgressBar, ProgressIndicator, Separator, Slider, Spinner, Table, TextComponent

public abstract class Control
extends Component

abstract class Control - The base class for all gui elements Each element has an absolute position, which is defined by the upper left corner.

To use a gui component, you have to create a subclass of the class App (public class myClass extends App {...} ). Then create an object of the gui component you like and pass the position and size to the constructor:

Button myButton = new Button(50,75,100,25,"Hello World")

The button will be occure on the window that belongs to the App instance. In this case the upper left corner of the button has the coordinates (50,75) and the size 100x25. The button is labled with "Hello World".
For each component different eventhandler can be set. For example:

myButton.onButtonClicked("myMethod") Every time the button is clicked, the method myMethod is invoked. myMethod must be implement in your subclass of App.

Please see the documentation of the different classes in package jltk.gui for detailed information.

Version:

25.3.2022

Author:

ms

Field Summary

Fields

Modifier and Type	Field	Description
protected javafx.scene.paint.Color	color
protected javafx.scene.control.Control	fxControl

Fields inherited from class jltk.Component

fxNode, hasFocus, myWindow, onFocusGained, onFocusLost

Constructor Summary

Constructors

Constructor	Description
Control()

Method Summary

Modifier and Type	Method	Description
javafx.scene.paint.Color	getColor()	Return the color of the component.
double	getHeight()	Return the height of the component
double	getWidth()	Return the width of the component
protected void	init(double pX, double pY, double pWidth, double pHeight, Window pWindow, javafx.scene.control.Control pComponent)	Basic initialisation, like setting postion and size, add the Element to the window.
void	setColor(double pRed, double pGreen, double pBlue)	The background color of the component will be changed to specified rgb-color
void	setColor(String pColor)	The background color of the component will be changed.
void	setColor(javafx.scene.paint.Color pColor)	The backgroundcolor of the component will be changed.
void	setHeight(double pHeight)	Set the new height of this component to the specified value.
void	setSize(double pWidth, double pHeight)	Sets the new size of the component.
void	setTooltip(String pText)	This component get an tooltip.
void	setWidth(double pWidth)	Set the new width of this component to the specified value.

Methods inherited from class jltk.Component

activate, deactivate, focus, getX, getY, hasFocus, hide, init, istActive, isVisible, runMethodByName, setOnFocusGained, setOnFocusLost, setPosition, show, toBack, toFront

Methods inherited from class java.lang.Object

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

Field Detail

fxControl

protected javafx.scene.control.Control fxControl

color

protected javafx.scene.paint.Color color

Constructor Detail

Control

public Control()

Method Detail

init

protected void init(double pX,
                    double pY,
                    double pWidth,
                    double pHeight,
                    Window pWindow,
                    javafx.scene.control.Control pComponent)

Basic initialisation, like setting postion and size, add the Element to the window. For some reason this cannot be solved using a constructor, because in subclasses the javaFX component must be initialised first. After this, init must be called.

Parameters:

pX - The horizontal coordinate

pY - The vertical coordinate

pWidth - The width of the component

pHeight - The height of the component

pWindow - The window on which the component should be placed

pComponent - The corresponding JavaFX-Component

setWidth

public void setWidth(double pWidth)

Set the new width of this component to the specified value.

Parameters:

pWidth - The new width of this component

setHeight

public void setHeight(double pHeight)

Set the new height of this component to the specified value.

Parameters:

pHeight - The new height of this component

setSize

public void setSize(double pWidth,
                    double pHeight)

Sets the new size of the component.

Parameters:

pWidth - the new width

pHeight - the new height

setColor

public void setColor(javafx.scene.paint.Color pColor)

The backgroundcolor of the component will be changed.

Parameters:

pColor - The new color

setColor

public void setColor(double pRed,
                     double pGreen,
                     double pBlue)

The background color of the component will be changed to specified rgb-color

Parameters:

pRed - the red proportion (must be between 0 and 1)

pGreen - the green proportion (must be between 0 and 1)

pBlue - the blue proportion (must be between 0 and 1)

setColor

public void setColor(String pColor)

The background color of the component will be changed. As Parameter you can use the color name from the javafx.scene.paint.Color field https://docs.oracle.com/javase/8/javafx/api/javafx/scene/paint/Color.html#field.summary For example setColor("ALICEBLUE") or setColor("blue").

Parameters:

pColor - the new color

getColor

public javafx.scene.paint.Color getColor()

Return the color of the component.

Returns:

The color of the component

See Also:

setColor(String), setColor(Color), setColor(double,double,double)

getHeight

public double getHeight()

Return the height of the component

Returns:

The height of the component

getWidth

public double getWidth()

Return the width of the component

Returns:

The width of the component

setTooltip

public void setTooltip(String pText)

This component get an tooltip. Tooltips typically shown, if the mouse moves over the component.

Parameters:

pText - the text of the tooltip