Class SignatureAppearanceRenderer

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.SignatureAppearanceRenderer

All Implemented Interfaces:

IPropertyContainer, IRenderer

public class SignatureAppearanceRenderer
extends AbstractTextFieldRenderer

The AbstractTextFieldRenderer implementation for SigFields.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static enum	SignatureAppearanceRenderer.DisplayOption	Signature display options.

Field Summary

Fields

Modifier and Type	Field	Description
private final SignatureAppearanceRenderer.DisplayOption	displayOption
private static final float	EPS
private boolean	isFontSizeApproximated
private static final float	TOP_SECTION	Extra space at the top.

Fields inherited from class AbstractTextFieldRenderer

font

Fields inherited from class AbstractFormFieldRenderer

flatRenderer

Fields inherited from class AbstractRenderer

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

Constructor Summary

Constructors

Constructor	Description
SignatureAppearanceRenderer(SignatureFieldAppearance modelElement)	Creates a new SignatureAppearanceRenderer instance.

Method Summary

Modifier and Type	Method	Description
private void	adjustChildrenLayout(SignatureAppearanceRenderer.DisplayOption displayOption, Rectangle signatureRect, Rectangle descriptionRect, int pageNum)
protected void	adjustFieldLayout(LayoutContext layoutContext)	Adjusts the field layout.
protected void	applyAcroField(DrawContext drawContext)	Applies the AcroField widget.
private void	approximateFontSizeToFitLayoutArea(LayoutContext layoutContext)
private float	calculateAdditionalHeight()
protected IRenderer	createFlatRenderer()	Creates the flat renderer instance.
String	getDefaultValue()	Gets the default value of the form field.
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.
LayoutResult	layout(LayoutContext layoutContext)	This method simulates positioning of the renderer, including all of its children, and returns the LayoutResult, representing the layout result, including occupied area, status, i.e.
private void	relayoutImage(Rectangle signatureRect, int pageNum)
private void	relayoutParagraph(IRenderer renderer, Rectangle rect, int pageNum)
private SignatureAppearanceRenderer.DisplayOption	retrieveRenderingMode()

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, isRendererFit, 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, getLastYLineRecursively, 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

TOP_SECTION

private static final float TOP_SECTION

Extra space at the top.

See Also:

• Constant Field Values

EPS

private static final float EPS

See Also:

• Constant Field Values

displayOption

private final SignatureAppearanceRenderer.DisplayOption displayOption

isFontSizeApproximated

private boolean isFontSizeApproximated

Constructor Details

SignatureAppearanceRenderer

public SignatureAppearanceRenderer(SignatureFieldAppearance modelElement)

Creates a new SignatureAppearanceRenderer instance.

Parameters:

modelElement - the model element

Method Details

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.

createFlatRenderer

protected IRenderer createFlatRenderer()

Creates the flat renderer instance.

Specified by:

createFlatRenderer in class AbstractFormFieldRenderer

Returns:

the renderer instance.

layout

public LayoutResult layout(LayoutContext layoutContext)

This method simulates positioning of the renderer, including all of its children, and returns the LayoutResult, representing the layout result, including occupied area, status, i.e. if there was enough place to fit the renderer subtree, etc. LayoutResult can be extended to return custom layout results for custom elements, e.g. TextRenderer uses TextLayoutResult as its result. This method can be called standalone to learn how much area the renderer subtree needs, or can be called before IRenderer.draw(DrawContext), to prepare the renderer to be flushed to the output stream.

Specified by:

layout in interface IRenderer

Overrides:

layout in class AbstractFormFieldRenderer

Parameters:

layoutContext - the description of layout area and any other additional information

Returns:

result of the layout process

adjustFieldLayout

protected void adjustFieldLayout(LayoutContext layoutContext)

Adjusts the field layout.

Specified by:

adjustFieldLayout in class AbstractFormFieldRenderer

Parameters:

layoutContext - layout context

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.

applyAcroField

protected void applyAcroField(DrawContext drawContext)

Applies the AcroField widget.

Specified by:

applyAcroField in class AbstractFormFieldRenderer

Parameters:

drawContext - the draw context

adjustChildrenLayout

private void adjustChildrenLayout(SignatureAppearanceRenderer.DisplayOption displayOption,
 Rectangle signatureRect,
 Rectangle descriptionRect,
 int pageNum)

relayoutImage

private void relayoutImage(Rectangle signatureRect,
 int pageNum)

relayoutParagraph

private void relayoutParagraph(IRenderer renderer,
 Rectangle rect,
 int pageNum)

calculateAdditionalHeight

private float calculateAdditionalHeight()

approximateFontSizeToFitLayoutArea

private void approximateFontSizeToFitLayoutArea(LayoutContext layoutContext)

retrieveRenderingMode

private SignatureAppearanceRenderer.DisplayOption retrieveRenderingMode()