Slider

Overview

A Slider is a component that allows the user to slide a bar to pick a value between a range

SliderSample.java
import totalcross.sys.Settings;
import totalcross.ui.Container;
import totalcross.ui.Label;
import totalcross.ui.ScrollBar;
import totalcross.ui.Slider;
import totalcross.ui.dialog.MessageBox;
import totalcross.ui.event.ControlEvent;
import totalcross.ui.event.Event;
import totalcross.ui.font.Font;
import totalcross.ui.gfx.Color;
import totalcross.ui.ScrollContainer;
public class SliderSample extends ScrollContainer {
private Label l;
private ScrollContainer sc;
@Override
public void initUI() {
try {
super.initUI();
setScrollBars(false, true);
add(l = new Label("", CENTER), LEFT, TOP);
Slider sl;
sl = new Slider(ScrollBar.HORIZONTAL);
sl.setFont(Font.getFont(false, Font.NORMAL_SIZE));
sl.appId = 1;
sl.setLiveScrolling(true);
sl.setBackColor(Color.getRGB(158, 197, 244));
sl.sliderColor = Color.getRGB(12, 98, 200);
sl.setValue(10);
add(sl,CENTER, TOP + fmH * 2 + 150, (Settings.screenWidth - ((Settings.screenWidth)/10)*2), PREFERRED);
sl = new Slider(ScrollBar.HORIZONTAL);
sl.setFont(Font.getFont(false, Font.NORMAL_SIZE / 2 * 3));
sl.appId = 2;
sl.setUnitIncrement(5);
sl.drawTicks = false;
sl.setBackColor(Color.getRGB(255, 234, 157));
sl.sliderColor = Color.getRGB(255, 199, 0);
sl.setValue(30);
add(sl, CENTER, AFTER + fmH + 100, (Settings.screenWidth - ((Settings.screenWidth)/10)*2), PREFERRED);
sl = new Slider(ScrollBar.HORIZONTAL);
sl.setFont(Font.getFont(false, Font.NORMAL_SIZE / 2 * 4));
sl.appId = 3;
sl.invertDirection = true;
sl.setBackColor(Color.getRGB(255, 192, 157));
sl.sliderColor = Color.getRGB(255, 92, 0);
sl.setValue(50);
add(sl, CENTER, AFTER + fmH + 50, (Settings.screenWidth - ((Settings.screenWidth)/10)*2), PREFERRED);
sl = new Slider(ScrollBar.VERTICAL);
sl.setFont(Font.getFont(false, Font.NORMAL_SIZE));
sl.appId = 4;
sl.setLiveScrolling(true);
sl.setBackColor(Color.getRGB(149, 243, 230));
sl.sliderColor = Color.getRGB(0, 195, 168);
sl.setValue(70);
add(sl, BEFORE + 200 , AFTER + fmH + 200, PREFERRED, Settings.screenHeight/3);
sl = new Slider(ScrollBar.VERTICAL);
sl.setFont(Font.getFont(false, Font.NORMAL_SIZE / 2 * 3));
sl.appId = 5;
sl.setLiveScrolling(true);
sl.setBackColor(Color.getRGB(255, 220, 157));
sl.sliderColor = Color.getRGB(255, 164, 0);
sl.setValue(90);
add(sl, CENTER , SAME, PREFERRED, Settings.screenHeight/3);
sl = new Slider(ScrollBar.VERTICAL);
sl.setFont(Font.getFont(false, Font.NORMAL_SIZE / 2 * 4));
sl.appId = 6;
sl.invertDirection = true;
sl.setBackColor(Color.getRGB(254, 156, 165));
sl.sliderColor = Color.getRGB(255, 0, 24);
sl.setValue(50);
add(sl,AFTER + 200, SAME, PREFERRED, Settings.screenHeight/3);
} catch (Exception ee) {
MessageBox.showException(ee, true);
}
}
@Override
public void onEvent(Event e) {
if (e.type == ControlEvent.PRESSED && e.target instanceof Slider) {
Slider s = (Slider) e.target;
}
}
}

Attributes

Type

Name

Description

boolean

drawFilledArea

Setting to false does not draw the filled line* of the Slider

boolean

drawTicks

Defining as true, ticks will be drawn along the Slider to indicate all the possible points where the Slider may be. By default, the number of ticks to be drawn are the same as the maximum slider value, (SeeMethods bellow), but this value can be modified by setting a different value for setUnitIncrement(int i)

boolean

invertDirection

Setting to True causes the filled area of the Slider to be the rightmost part of the scroll circle, which by default is the leftmost

int

sliderColor

Changing this attribute value colors the circle and the filled line* of the Slider

Methods

Type

Name

Description

Constructor

Slider( )

Cria um Slider na posição horizontal com o limite mínimo e máximo de 0 e 100, respectivamente

Constructor

Slider(byte orientation)

Cria um Slider na posição desejada com o limite mínimo e máximo de 0 e 100, respectivamente,

void

setMinimum(int i)

Sets the minimum value of the bar limit

void

setMaximum(int i)

Sets the maximum value of the bar limit

void

setUnitIncrement(int i)

Sets the value that will be incremented or decremented to the Slider while using a PenDrag event

void

setValue(int i)

Sets the starting value for the Slider to begin with. If this initial value is greater than the maximum value, then it will be limited to the maximum

References

See the JavaDocs for more information