Module javafx.controls
Package javafx.scene.control.skin

# Class LabeledSkinBase<C extends Labeled>

java.lang.Object
javafx.scene.control.SkinBase<C>
javafx.scene.control.skin.LabeledSkinBase<C>

All Implemented Interfaces:
  `Skin<C>`

Direct Known Subclasses:
  `ButtonSkin`, `CellSkinBase`, `CheckBoxSkin`, `HyperlinkSkin`, `LabelSkin`, `RadioButtonSkin`, `TitledPaneSkin`, `ToggleButtonSkin`

public abstract class LabeledSkinBase<C extends Labeled> extends SkinBase<C>
Default skin implementation for controls extends `Labeled`.

Since:
  9
See Also:
  - `Labeled`

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `LabeledSkinBase(C labeled)`
  Constructor for LabeledSkinBase.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `double`
  `computeBaselineOffset(double topInset, double rightInset, double bottomInset, double leftInset)`
  Calculates the baseline offset based on the first managed child.
  `protected double`
  `computeMinWidth(double height, double topInset, double rightInset, double bottomInset, double leftInset)`
  Compute and return the minimum width of this Labeled.
  `protected void`
  `layoutChildren(double x, double y, double w, double h)`
  The Layout algorithm works like this: - Get the labeled w/h, graphic w/h, text w/h - Compute content w/h based on graphicVPos, graphicHPos, graphicTextGap, and graphic w/h and text w/h - (Note that the text content has been pre-truncated where necessary) - compute content x/y based on content w/h and labeled w/h and the labeled's hpos and vpos - position the graphic and text
  `protected void`
  `layoutLabelInArea(double x, double y, double w, double h)`
  Performs the actual layout of the label content within the area given.
  `protected void`
  `layoutLabelInArea(double x, double y, double w, double h, Pos alignment)`
  Performs the actual layout of the label content within the area given.
  `protected void`
  `updateChildren()`
  Updates the children managed by LabeledSkinBase, which can be the Labeled graphic and/or a Text node.

  ### Methods declared in class javafx.scene.control.SkinBase

  `computeMaxHeight, computeMaxWidth, computeMinHeight, computePrefHeight, computePrefWidth, consumeMouseEvents, dispose, executeAccessibleAction, getChildren, getClassCssMetaData, getCssMetaData, getNode, getSkinnable, layoutInArea, layoutInArea, layoutInArea, positionInArea, positionInArea, pseudoClassStateChanged, queryAccessibleAttribute, registerChangeListener, registerInvalidationListener, registerListChangeListener, snappedBottomInset, snappedLeftInset, snappedRightInset, snappedTopInset, snapPosition, snapPositionX, snapPositionY, snapSize, snapSizeX, snapSizeY, snapSpace, snapSpaceX, snapSpaceY, unregisterChangeListeners, unregisterInvalidationListeners, unregisterListChangeListeners`

  ### Methods declared in class java.lang.Object

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

- ## Constructor Details

  - ### LabeledSkinBase

    public LabeledSkinBase(C labeled)
    Constructor for LabeledSkinBase. The Labeled must be specified, and cannot be null. At the conclusion of the constructor call, the skin will be marked as needsLayout, and will be fully configured based on the current state of the labeled. Any subsequent changes to the Labeled will be handled via listeners and applied appropriately.
    Parameters:
      `labeled` - The labeled that this skin should be installed onto.

- ## Method Details

  - ### updateChildren

    protected void updateChildren()
    Updates the children managed by LabeledSkinBase, which can be the Labeled graphic and/or a Text node. Only those nodes which actually must be used are used. For example, with a ContentDisplay of GRAPHIC_ONLY the text node is not added, and with a ContentDisplay of TEXT_ONLY, the graphic is not added.

  - ### computeMinWidth

    protected double computeMinWidth(double height, double topInset, double rightInset, double bottomInset, double leftInset)
    Compute and return the minimum width of this Labeled. The minimum width is the smaller of the width of "..." and the width with the actual text. In this way, if the text width itself is smaller than the ellipsis then we should use that as the min width, otherwise the ellipsis needs to be the min width.

    We use the same calculation here regardless of whether we are talking about a single or multiline labeled. So a multiline labeled may find that the width of the "..." is as small as it will ever get.

    Overrides:
      `computeMinWidth` in class `SkinBase<C extends Labeled>`
    Parameters:
      `height` - The height of the Skin, in case this value might dictate the minimum width.
      `topInset` - the pixel snapped top inset
      `rightInset` - the pixel snapped right inset
      `bottomInset` - the pixel snapped bottom inset
      `leftInset` - the pixel snapped left inset
    Returns:
      A double representing the minimum width of this Skin.

  - ### computeBaselineOffset

    public double computeBaselineOffset(double topInset, double rightInset, double bottomInset, double leftInset)
    Calculates the baseline offset based on the first managed child. If there is no such child, returns `Node.getBaselineOffset()`.
    Overrides:
      `computeBaselineOffset` in class `SkinBase<C extends Labeled>`
    Parameters:
      `topInset` - the pixel snapped top inset
      `rightInset` - the pixel snapped right inset
      `bottomInset` - the pixel snapped bottom inset
      `leftInset` - the pixel snapped left inset
    Returns:
      baseline offset

  - ### layoutChildren

    protected void layoutChildren(double x, double y, double w, double h)
    The Layout algorithm works like this: - Get the labeled w/h, graphic w/h, text w/h - Compute content w/h based on graphicVPos, graphicHPos, graphicTextGap, and graphic w/h and text w/h - (Note that the text content has been pre-truncated where necessary) - compute content x/y based on content w/h and labeled w/h and the labeled's hpos and vpos - position the graphic and text
    Overrides:
      `layoutChildren` in class `SkinBase<C extends Labeled>`
    Parameters:
      `x` - the x position
      `y` - the y position
      `w` - the width
      `h` - the height

  - ### layoutLabelInArea

    protected void layoutLabelInArea(double x, double y, double w, double h)
    Performs the actual layout of the label content within the area given. This method is called by subclasses that override layoutChildren().
    Parameters:
      `x` - The x position of the label part of the control, inside padding
      `y` - The y position of the label part of the control, inside padding
      `w` - The width of the label part of the control, not including padding
      `h` - The height of the label part of the control, not including padding

  - ### layoutLabelInArea

    protected void layoutLabelInArea(double x, double y, double w, double h, Pos alignment)
    Performs the actual layout of the label content within the area given. This method is called by subclasses that override layoutChildren().
    Parameters:
      `x` - The x position of the label part of the control, inside padding
      `y` - The y position of the label part of the control, inside padding
      `w` - The width of the label part of the control, not including padding
      `h` - The height of the label part of the control, not including padding
      `alignment` - The alignment of the label part of the control within the given area. If null, then the control's alignment will be used.