com.google.appinventor.components.runtime

Class Slider

java.lang.Object

com.google.appinventor.components.runtime.VisibleComponent

com.google.appinventor.components.runtime.AndroidViewComponent

com.google.appinventor.components.runtime.Slider

All Implemented Interfaces:

android.widget.SeekBar.OnSeekBarChangeListener, Component

public class Slider
extends AndroidViewComponent
implements android.widget.SeekBar.OnSeekBarChangeListener

This class is used to display a Slider.

The Slider is a progress bar that adds a draggable thumb. You can touch the thumb and drag left or right to set the slider thumb position. As Slider thumb is dragged, it will trigger PositionChanged event, reporting the position of the Slider thumb. The Slider uses the following default values. However these values can be changed through designer or block editor

• MinValue
• MaxValue
• ThumbPosition

Field Summary

Fields inherited from class com.google.appinventor.components.runtime.AndroidViewComponent

container

Fields inherited from interface com.google.appinventor.components.runtime.Component

ACCELEROMETER_SENSITIVITY_MODERATE, ACCELEROMETER_SENSITIVITY_STRONG, ACCELEROMETER_SENSITIVITY_WEAK, ALIGNMENT_CENTER, ALIGNMENT_NORMAL, ALIGNMENT_OPPOSITE, ASSET_DIRECTORY, BUTTON_SHAPE_DEFAULT, BUTTON_SHAPE_OVAL, BUTTON_SHAPE_RECT, BUTTON_SHAPE_ROUNDED, COLOR_BLACK, COLOR_BLUE, COLOR_CYAN, COLOR_DEFAULT, COLOR_DKGRAY, COLOR_GRAY, COLOR_GREEN, COLOR_LTGRAY, COLOR_MAGENTA, COLOR_NONE, COLOR_ORANGE, COLOR_PINK, COLOR_RED, COLOR_WHITE, COLOR_YELLOW, DEFAULT_VALUE_COLOR_BLACK, DEFAULT_VALUE_COLOR_BLUE, DEFAULT_VALUE_COLOR_CYAN, DEFAULT_VALUE_COLOR_DEFAULT, DEFAULT_VALUE_COLOR_DKGRAY, DEFAULT_VALUE_COLOR_GRAY, DEFAULT_VALUE_COLOR_GREEN, DEFAULT_VALUE_COLOR_LTGRAY, DEFAULT_VALUE_COLOR_MAGENTA, DEFAULT_VALUE_COLOR_NONE, DEFAULT_VALUE_COLOR_ORANGE, DEFAULT_VALUE_COLOR_PINK, DEFAULT_VALUE_COLOR_RED, DEFAULT_VALUE_COLOR_WHITE, DEFAULT_VALUE_COLOR_YELLOW, DIRECTION_EAST, DIRECTION_MAX, DIRECTION_MIN, DIRECTION_NONE, DIRECTION_NORTH, DIRECTION_NORTHEAST, DIRECTION_NORTHWEST, DIRECTION_SOUTH, DIRECTION_SOUTHEAST, DIRECTION_SOUTHWEST, DIRECTION_WEST, FONT_DEFAULT_SIZE, LAYOUT_ORIENTATION_HORIZONTAL, LAYOUT_ORIENTATION_VERTICAL, LENGTH_FILL_PARENT, LENGTH_PREFERRED, LENGTH_UNKNOWN, SLIDER_MAX_VALUE, SLIDER_MIN_VALUE, SLIDER_THUMB_VALUE, TOAST_LENGTH_LONG, TOAST_LENGTH_SHORT, TYPEFACE_DEFAULT, TYPEFACE_MONOSPACE, TYPEFACE_SANSSERIF, TYPEFACE_SERIF

Constructor Summary

Constructors

Constructor and Description
Slider(ComponentContainer container) Creates a new Slider component.

Method Summary

Methods

Modifier and Type	Method and Description
int	ColorLeft() Returns the color of the slider bar to the left of the thumb, as an alpha-red-green-blue integer, i.e., 0xAARRGGBB.
void	ColorLeft(int argb) Specifies the color of the slider bar to the left of the thumb as an alpha-red-green-blue integer, i.e., 0xAARRGGBB.
int	ColorRight() Returns the color of the slider bar to the right of the thumb, as an alpha-red-green-blue integer, i.e., 0xAARRGGBB.
void	ColorRight(int argb) Specifies the color of the slider bar to the right of the thumb as an alpha-red-green-blue integer, i.e., 0xAARRGGBB.
android.view.View	getView() Returns the View that is displayed in the UI.
int	Height() Returns the component's vertical height, measured in pixels.
void	Height(int height) Specifies the component's vertical height, measured in pixels.
float	MaxValue() Returns the slider max value
void	MaxValue(float value)
float	MinValue() Returns the value of slider min value.
void	MinValue(float value)
void	onProgressChanged(android.widget.SeekBar seekBar, int progress, boolean fromUser)
void	onStartTrackingTouch(android.widget.SeekBar seekBar)
void	onStopTrackingTouch(android.widget.SeekBar seekBar)
void	PositionChanged(float thumbPosition) Indicates that position of the slider thumb has changed.
boolean	ThumbEnabled() Whether or not the slider thumb is being be shown
void	ThumbEnabled(boolean enabled) Sets whether or not the slider thumb should be shown
float	ThumbPosition() Returns the position of slider thumb
void	ThumbPosition(float position) Sets the slider thumb position.

Methods inherited from class com.google.appinventor.components.runtime.AndroidViewComponent

Column, Column, CopyHeight, CopyWidth, getDispatchDelegate, Row, Row, Visible, Visible, Width, Width

Methods inherited from class java.lang.Object

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

Constructor Detail

Slider

public Slider(ComponentContainer container)

Creates a new Slider component.

Parameters:

container - container that the component will be placed in

Method Detail

ThumbEnabled

public void ThumbEnabled(boolean enabled)

Sets whether or not the slider thumb should be shown

Parameters:

enabled - Whether or not the slider thumb should be shown

ThumbEnabled

public boolean ThumbEnabled()

Whether or not the slider thumb is being be shown

Returns:

Whether or not the slider thumb is being be shown

ThumbPosition

public void ThumbPosition(float position)

Sets the slider thumb position.

Parameters:

position - the position of the slider thumb. This value should be between sliderMinValue and sliderMaxValue. If this value is not within the min and max, then it will be calculated.

ThumbPosition

public float ThumbPosition()

Returns the position of slider thumb

Returns:

the slider thumb position

MinValue

public void MinValue(float value)

MinValue

public float MinValue()

Returns the value of slider min value.

Returns:

the value of slider min value.

MaxValue

public void MaxValue(float value)

MaxValue

public float MaxValue()

Returns the slider max value

Returns:

the slider max value

ColorLeft

public int ColorLeft()

Returns the color of the slider bar to the left of the thumb, as an alpha-red-green-blue integer, i.e., 0xAARRGGBB. An alpha of 00 indicates fully transparent and FF means opaque.

Returns:

left color in the format 0xAARRGGBB, which includes alpha, red, green, and blue components

ColorLeft

public void ColorLeft(int argb)

Specifies the color of the slider bar to the left of the thumb as an alpha-red-green-blue integer, i.e., 0xAARRGGBB. An alpha of 00 indicates fully transparent and FF means opaque.

Parameters:

argb - background color in the format 0xAARRGGBB, which includes alpha, red, green, and blue components

ColorRight

public int ColorRight()

Returns the color of the slider bar to the right of the thumb, as an alpha-red-green-blue integer, i.e., 0xAARRGGBB. An alpha of 00 indicates fully transparent and FF means opaque.

Returns:

right color in the format 0xAARRGGBB, which includes alpha, red, green, and blue components

ColorRight

public void ColorRight(int argb)

Specifies the color of the slider bar to the right of the thumb as an alpha-red-green-blue integer, i.e., 0xAARRGGBB. An alpha of 00 indicates fully transparent and FF means opaque.

Parameters:

argb - background color in the format 0xAARRGGBB, which includes alpha, red, green, and blue components

getView

public android.view.View getView()

Description copied from class: AndroidViewComponent

Returns the View that is displayed in the UI.

Specified by:

getView in class AndroidViewComponent

onProgressChanged

public void onProgressChanged(android.widget.SeekBar seekBar,
                     int progress,
                     boolean fromUser)

Specified by:

onProgressChanged in interface android.widget.SeekBar.OnSeekBarChangeListener

PositionChanged

public void PositionChanged(float thumbPosition)

Indicates that position of the slider thumb has changed.

onStartTrackingTouch

public void onStartTrackingTouch(android.widget.SeekBar seekBar)

Specified by:

onStartTrackingTouch in interface android.widget.SeekBar.OnSeekBarChangeListener

onStopTrackingTouch

public void onStopTrackingTouch(android.widget.SeekBar seekBar)

Specified by:

onStopTrackingTouch in interface android.widget.SeekBar.OnSeekBarChangeListener

Height

public int Height()

Returns the component's vertical height, measured in pixels.

Overrides:

Height in class AndroidViewComponent

Returns:

height in pixels

Height

public void Height(int height)

Specifies the component's vertical height, measured in pixels.

Overrides:

Height in class AndroidViewComponent

Parameters:

height - in pixels