javax.swing

Interface Scrollable

    • Method Summary

      Methods 
      Modifier and Type Method and Description
      Dimension getPreferredScrollableViewportSize()
      Returns the preferred size of the viewport for a view component.
      int getScrollableBlockIncrement(Rectangle visibleRect, int orientation, int direction)
      Components that display logical rows or columns should compute the scroll increment that will completely expose one block of rows or columns, depending on the value of orientation.
      boolean getScrollableTracksViewportHeight()
      Return true if a viewport should always force the height of this Scrollable to match the height of the viewport.
      boolean getScrollableTracksViewportWidth()
      Return true if a viewport should always force the width of this Scrollable to match the width of the viewport.
      int getScrollableUnitIncrement(Rectangle visibleRect, int orientation, int direction)
      Components that display logical rows or columns should compute the scroll increment that will completely expose one new row or column, depending on the value of orientation.

        

    • Method Detail

      • getPreferredScrollableViewportSize

        Dimension getPreferredScrollableViewportSize()
        Returns the preferred size of the viewport for a view component. For example, the preferred size of a JList component is the size required to accommodate all of the cells in its list. However, the value of preferredScrollableViewportSize is the size required for JList.getVisibleRowCount rows. A component without any properties that would affect the viewport size should just return getPreferredSize here.
        Returns:
        the preferredSize of a JViewport whose view is this Scrollable
        See Also:
        JComponent.getPreferredSize()
      • getScrollableUnitIncrement

        int getScrollableUnitIncrement(Rectangle visibleRect,
                                     int orientation,
                                     int direction)
        Components that display logical rows or columns should compute the scroll increment that will completely expose one new row or column, depending on the value of orientation. Ideally, components should handle a partially exposed row or column by returning the distance required to completely expose the item.

        Scrolling containers, like JScrollPane, will use this method each time the user requests a unit scroll.

        Parameters:
        visibleRect - The view area visible within the viewport
        orientation - Either SwingConstants.VERTICAL or SwingConstants.HORIZONTAL.
        direction - Less than zero to scroll up/left, greater than zero for down/right.
        Returns:
        The "unit" increment for scrolling in the specified direction. This value should always be positive.
        See Also:
        JScrollBar.setUnitIncrement(int)
      • getScrollableBlockIncrement

        int getScrollableBlockIncrement(Rectangle visibleRect,
                                      int orientation,
                                      int direction)
        Components that display logical rows or columns should compute the scroll increment that will completely expose one block of rows or columns, depending on the value of orientation.

        Scrolling containers, like JScrollPane, will use this method each time the user requests a block scroll.

        Parameters:
        visibleRect - The view area visible within the viewport
        orientation - Either SwingConstants.VERTICAL or SwingConstants.HORIZONTAL.
        direction - Less than zero to scroll up/left, greater than zero for down/right.
        Returns:
        The "block" increment for scrolling in the specified direction. This value should always be positive.
        See Also:
        JScrollBar.setBlockIncrement(int)
      • getScrollableTracksViewportWidth

        boolean getScrollableTracksViewportWidth()
        Return true if a viewport should always force the width of this Scrollable to match the width of the viewport. For example a normal text view that supported line wrapping would return true here, since it would be undesirable for wrapped lines to disappear beyond the right edge of the viewport. Note that returning true for a Scrollable whose ancestor is a JScrollPane effectively disables horizontal scrolling.

        Scrolling containers, like JViewport, will use this method each time they are validated.

        Returns:
        True if a viewport should force the Scrollables width to match its own.
      • getScrollableTracksViewportHeight

        boolean getScrollableTracksViewportHeight()
        Return true if a viewport should always force the height of this Scrollable to match the height of the viewport. For example a columnar text view that flowed text in left to right columns could effectively disable vertical scrolling by returning true here.

        Scrolling containers, like JViewport, will use this method each time they are validated.

        Returns:
        True if a viewport should force the Scrollables height to match its own.

Traduction non disponible

Les API Java ne sont pas encore traduites en français sur l'infobrol. Seule la version anglaise est disponible pour l'instant.

Version en cache

05/11/2024 01:21:26 Cette version de la page est en cache (à la date du 05/11/2024 01:21:26) afin d'accélérer le traitement. Vous pouvez activer le mode utilisateur dans le menu en haut pour afficher la dernère version de la page.

Document créé le 30/08/2006, dernière modification le 04/03/2020
Source du document imprimé : https://www.gaudry.be/java-api-rf-javax/swing/scrollable.html

L'infobrol est un site personnel dont le contenu n'engage que moi. Le texte est mis à disposition sous licence CreativeCommons(BY-NC-SA). Plus d'info sur les conditions d'utilisation et sur l'auteur.

Références

  1. Consulter le document html Langue du document :fr Manuel PHP : https://docs.oracle.com, Scrollable

Ces références et liens indiquent des documents consultés lors de la rédaction de cette page, ou qui peuvent apporter un complément d'information, mais les auteurs de ces sources ne peuvent être tenus responsables du contenu de cette page.
L'auteur de ce site est seul responsable de la manière dont sont présentés ici les différents concepts, et des libertés qui sont prises avec les ouvrages de référence. N'oubliez pas que vous devez croiser les informations de sources multiples afin de diminuer les risques d'erreurs.

Table des matières Haut