com.google.appinventor.components.runtime

Class AndroidViewComponent

java.lang.Object

com.google.appinventor.components.runtime.VisibleComponent

com.google.appinventor.components.runtime.AndroidViewComponent

All Implemented Interfaces:

Component

Direct Known Subclasses:

ButtonBase, Canvas, CheckBox, HVArrangement, Image, Label, ListView, Slider, Spinner, TableArrangement, TextBoxBase, VideoPlayer, WebViewer

public abstract class AndroidViewComponent
extends VisibleComponent

Underlying base class for all components with views; not accessible to Simple programmers.

Provides implementations for standard properties and events.

Field Summary

Fields

Modifier and Type	Field and Description
protected ComponentContainer	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

Modifier	Constructor and Description
protected	AndroidViewComponent(ComponentContainer container) Creates a new AndroidViewComponent.

Method Summary

Methods

Modifier and Type	Method and Description
int	Column() Column property getter method.
void	Column(int column) Column property setter method.
void	CopyHeight(AndroidViewComponent sourceComponent) Copy the height from another component to this one.
void	CopyWidth(AndroidViewComponent sourceComponent) Copy the width from another component to this one.
HandlesEventDispatching	getDispatchDelegate() Returns the dispatch delegate that is responsible for dispatching events for this component.
abstract 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.
int	Row() Row property getter method.
void	Row(int row) Row property setter method.
boolean	Visible() Returns true iff the component is visible.
void	Visible(java.lang.Boolean visibility) Specifies whether the component should be visible on the screen.
int	Width() Returns the component's horizontal width, measured in pixels.
void	Width(int width) Specifies the component's horizontal width, measured in pixels.

Methods inherited from class java.lang.Object

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

Field Detail

container

protected final ComponentContainer container

Constructor Detail

AndroidViewComponent

protected AndroidViewComponent(ComponentContainer container)

Creates a new AndroidViewComponent.

Parameters:

container - container, component will be placed in

Method Detail

getView

public abstract android.view.View getView()

Returns the View that is displayed in the UI.

Visible

public boolean Visible()

Returns true iff the component is visible.

Returns:

true iff the component is visible

Visible

public void Visible(java.lang.Boolean visibility)

Specifies whether the component should be visible on the screen. Value is true if the component is showing and false if hidden.

Parameters:

visibility - desired state

Width

public int Width()

Returns the component's horizontal width, measured in pixels.

Specified by:

Width in class VisibleComponent

Returns:

width in pixels

Width

public void Width(int width)

Specifies the component's horizontal width, measured in pixels.

Specified by:

Width in class VisibleComponent

Parameters:

width - in pixels

CopyWidth

public void CopyWidth(AndroidViewComponent sourceComponent)

Copy the width from another component to this one. Note that we don't use the getter method to get the property value from the source because the getter returns the computed width whereas we want the width that it was last set to. That's because we want to preserve values like LENGTH_FILL_PARENT and LENGTH_PREFERRED

Parameters:

sourceComponent - the component to copy from

Height

public int Height()

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

Specified by:

Height in class VisibleComponent

Returns:

height in pixels

Height

public void Height(int height)

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

Specified by:

Height in class VisibleComponent

Parameters:

height - in pixels

CopyHeight

public void CopyHeight(AndroidViewComponent sourceComponent)

Copy the height from another component to this one. Note that we don't use the getter method to get the property value from the source because the getter returns the computed width whereas we want the width that it was last set to. That's because we want to preserve values like LENGTH_FILL_PARENT and LENGTH_PREFERRED

Parameters:

sourceComponent - the component to copy from

Column

public int Column()

Column property getter method.

Returns:

column property used by the table arrangement

Column

public void Column(int column)

Column property setter method.

Parameters:

column - column property used by the table arrangement

Row

public int Row()

Row property getter method.

Returns:

row property used by the table arrangement

Row

public void Row(int row)

Row property setter method.

Parameters:

row - row property used by the table arrangement

getDispatchDelegate

public HandlesEventDispatching getDispatchDelegate()

Description copied from interface: Component

Returns the dispatch delegate that is responsible for dispatching events for this component.