Class ButtonRenderer

java.lang.Object

com.itextpdf.layout.renderer.AbstractRenderer

com.itextpdf.layout.renderer.BlockRenderer

com.itextpdf.forms.form.renderer.AbstractFormFieldRenderer

com.itextpdf.forms.form.renderer.AbstractTextFieldRenderer

com.itextpdf.forms.form.renderer.AbstractOneLineTextFieldRenderer

com.itextpdf.forms.form.renderer.ButtonRenderer

All Implemented Interfaces:

IPropertyContainer, IRenderer

public class ButtonRenderer
extends AbstractOneLineTextFieldRenderer

The AbstractTextFieldRenderer implementation for buttons.

Field Summary

Fields

Modifier and Type	Field	Description
private static final float	DEFAULT_Y_OFFSET	Default padding Y offset for an input button.
private boolean	isSplit	Indicates if the one line caption was split.
private static final float	RELATIVE_PADDING_FOR_SMALL_SIZES	Relative value is quite big in order to preserve visible padding on small field sizes.

Fields inherited from class AbstractTextFieldRenderer

font

Fields inherited from class AbstractFormFieldRenderer

flatRenderer

Fields inherited from class AbstractRenderer

childRenderers, EPS, flushed, INF, isLastRendererForModelElement, modelElement, occupiedArea, OVERLAP_EPSILON, parent, positionedRenderers, properties

Constructor Summary

Constructors

Constructor	Description
ButtonRenderer(Button modelElement)	Creates a new ButtonRenderer instance.

Method Summary

Modifier and Type	Method	Description
protected void	adjustFieldLayout(LayoutContext layoutContext)	Adjusts the field layout.
protected void	applyAcroField(DrawContext drawContext)	Applies the AcroField widget.
protected IRenderer	createFlatRenderer()	Creates the flat renderer instance.
String	getDefaultValue()	Gets the default value of the form field.
protected Float	getLastYLineRecursively()
IRenderer	getNextRenderer()	Gets a new instance of this class to be used as a next renderer, after this renderer is used, if IRenderer.layout(LayoutContext) is called more than once.
protected boolean	isLayoutBasedOnFlatRenderer()	Determines, whether the layout is based in the renderer itself or flat renderer.
protected boolean	isRendererFit(float availableWidth, float availableHeight)	Checks if the renderer fits a certain width and height.
(package private) void	setContentHeight(IRenderer flatRenderer, float height)	Sets the content height.

Methods inherited from class AbstractOneLineTextFieldRenderer

cropContentLines

Methods inherited from class AbstractTextFieldRenderer

adjustNumberOfContentLines, adjustNumberOfContentLines, applyDefaultFieldProperties, approximateFontSize, calculateFittingFontSize, createParagraphRenderer, getHeightRowsBased, getLowestChildBottom, updateHtmlColsSizeBasedWidth, updatePdfFont

Methods inherited from class AbstractFormFieldRenderer

applyAccessibilityProperties, draw, drawChildren, getConformance, getLang, getMinMaxWidth, getModelId, isFlatten, layout, writeAcroFormFieldLangAttribute

Methods inherited from class BlockRenderer

applyRotationLayout, applyVerticalAlignment, beginRotationIfApplied, createOverflowRenderer, createRotationTransformInsideOccupiedArea, createSplitRenderer, endRotationIfApplied, getMinMaxWidth, getOccupiedAreaBBox, getResolvedFont

Methods inherited from class AbstractRenderer

addAllProperties, addChild, alignChildHorizontally, allowLastYLineRecursiveExtraction, applyAbsolutePosition, applyAction, applyBorderBox, applyBorderBox, applyDestination, applyDestinationsAndAnnotation, applyLinkAnnotation, applyMargins, applyMargins, applyPaddings, applyPaddings, applyRelativePositioningTranslation, beginElementOpacityApplying, beginTransformationIfApplied, calculateAbsolutePdfBBox, calculateBBox, calculateShiftToPositionBBoxOfPointsAt, clipBackgroundArea, clipBackgroundArea, clipBorderArea, createXObject, deleteOwnProperty, deleteProperty, drawBackground, drawBorder, endElementOpacityApplying, endTransformationIfApplied, getBackgroundArea, getBorderAreaBBox, getBorderRadii, getBorders, getChildRenderers, getDefaultProperty, getFirstYLineRecursively, getInnerAreaBBox, getMargins, getModelElement, getOccupiedArea, getOwnProperties, getOwnProperty, getPaddings, getParent, getProperty, getProperty, getPropertyAsBoolean, getPropertyAsColor, getPropertyAsFloat, getPropertyAsFloat, getPropertyAsFont, getPropertyAsInteger, getPropertyAsTransparentColor, getPropertyAsUnitValue, hasAbsoluteUnitValue, hasOwnOrModelProperty, hasOwnProperty, hasProperty, hasRelativeUnitValue, initElementAreas, isAbsolutePosition, isBorderBoxSizing, isFirstOnRootArea, isFixedLayout, isFlushed, isKeepTogether, isNotFittingHeight, isNotFittingLayoutArea, isNotFittingWidth, isOverflowFit, isOverflowProperty, isOverflowProperty, isOverflowProperty, isPositioned, isRelativePosition, isStaticLayout, move, rectangleToPointsList, retrieveHeight, retrieveMaxHeight, retrieveMaxWidth, retrieveMinHeight, retrieveMinWidth, retrieveResolvedDeclaredHeight, retrieveUnitValue, retrieveUnitValue, retrieveWidth, setBorders, setMinMaxWidthBasedOnFixedWidth, setParent, setProperty, toString, transformPoints, updateHeight, updateHeightsOnSplit, updateMaxHeight, updateMinHeight, updateWidth

Methods inherited from class Object

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

Field Details

DEFAULT_Y_OFFSET

private static final float DEFAULT_Y_OFFSET

Default padding Y offset for an input button.

See Also:

• Constant Field Values

RELATIVE_PADDING_FOR_SMALL_SIZES

private static final float RELATIVE_PADDING_FOR_SMALL_SIZES

Relative value is quite big in order to preserve visible padding on small field sizes. This constant is taken arbitrary, based on visual similarity to Acrobat behaviour.

See Also:

• Constant Field Values

isSplit

private boolean isSplit

Indicates if the one line caption was split.

Constructor Details

ButtonRenderer

public ButtonRenderer(Button modelElement)

Creates a new ButtonRenderer instance.

Parameters:

modelElement - the model element

Method Details

adjustFieldLayout

protected void adjustFieldLayout(LayoutContext layoutContext)

Adjusts the field layout.

Specified by:

adjustFieldLayout in class AbstractFormFieldRenderer

Parameters:

layoutContext - layout context

isLayoutBasedOnFlatRenderer

protected boolean isLayoutBasedOnFlatRenderer()

Determines, whether the layout is based in the renderer itself or flat renderer.

Overrides:

isLayoutBasedOnFlatRenderer in class AbstractFormFieldRenderer

Returns:

true if layout is based on flat renderer, false otherwise.

getLastYLineRecursively

protected Float getLastYLineRecursively()

Overrides:

getLastYLineRecursively in class AbstractRenderer

Returns:

createFlatRenderer

protected IRenderer createFlatRenderer()

Creates the flat renderer instance.

Specified by:

createFlatRenderer in class AbstractFormFieldRenderer

Returns:

the renderer instance.

getNextRenderer

public IRenderer getNextRenderer()

Gets a new instance of this class to be used as a next renderer, after this renderer is used, if IRenderer.layout(LayoutContext) is called more than once.

Returns:

new renderer instance

getDefaultValue

public String getDefaultValue()

Gets the default value of the form field.

Overrides:

getDefaultValue in class AbstractFormFieldRenderer

Returns:

the default value of the form field.

isRendererFit

protected boolean isRendererFit(float availableWidth,
 float availableHeight)

Checks if the renderer fits a certain width and height.

Overrides:

isRendererFit in class AbstractFormFieldRenderer

Parameters:

availableWidth - the available width

availableHeight - the available height

Returns:

true, if the renderer fits.

applyAcroField

protected void applyAcroField(DrawContext drawContext)

Applies the AcroField widget.

Specified by:

applyAcroField in class AbstractFormFieldRenderer

Parameters:

drawContext - the draw context

setContentHeight

void setContentHeight(IRenderer flatRenderer,
 float height)

Sets the content height.

Overrides:

setContentHeight in class AbstractOneLineTextFieldRenderer

Parameters:

flatRenderer - the flat renderer

height - the height