Module java.desktop

Interface AccessibleComponent

    • Method Summary

      Modifier and Type Method Description
      void addFocusListener​(FocusListener l)
      Adds the specified focus listener to receive focus events from this component.
      boolean contains​(Point p)
      Checks whether the specified point is within this object's bounds, where the point's x and y coordinates are defined to be relative to the coordinate system of the object.
      Accessible getAccessibleAt​(Point p)
      Returns the Accessible child, if one exists, contained at the local coordinate Point.
      Color getBackground()
      Gets the background color of this object.
      Rectangle getBounds()
      Gets the bounds of this object in the form of a Rectangle object.
      Cursor getCursor()
      Gets the cursor of this object.
      Font getFont()
      Gets the font of this object.
      FontMetrics getFontMetrics​(Font f)
      Gets the FontMetrics of this object.
      Color getForeground()
      Gets the foreground color of this object.
      Point getLocation()
      Gets the location of the object relative to the parent in the form of a point specifying the object's top-left corner in the screen's coordinate space.
      Point getLocationOnScreen()
      Returns the location of the object on the screen.
      Dimension getSize()
      Returns the size of this object in the form of a Dimension object.
      boolean isEnabled()
      Determines if the object is enabled.
      boolean isFocusTraversable()
      Returns whether this object can accept focus or not.
      boolean isShowing()
      Determines if the object is showing.
      boolean isVisible()
      Determines if the object is visible.
      void removeFocusListener​(FocusListener l)
      Removes the specified focus listener so it no longer receives focus events from this component.
      void requestFocus()
      Requests focus for this object.
      void setBackground​(Color c)
      Sets the background color of this object.
      void setBounds​(Rectangle r)
      Sets the bounds of this object in the form of a Rectangle object.
      void setCursor​(Cursor cursor)
      Sets the cursor of this object.
      void setEnabled​(boolean b)
      Sets the enabled state of the object.
      void setFont​(Font f)
      Sets the font of this object.
      void setForeground​(Color c)
      Sets the foreground color of this object.
      void setLocation​(Point p)
      Sets the location of the object relative to the parent.
      void setSize​(Dimension d)
      Resizes this object so that it has width and height.
      void setVisible​(boolean b)
      Sets the visible state of the object.
    • Method Detail

      • getBackground

        Color getBackground()
        Gets the background color of this object.
        Returns:
        the background color, if supported, of the object; otherwise, null
        See Also:
        setBackground(java.awt.Color)
      • setBackground

        void setBackground​(Color c)
        Sets the background color of this object.
        Parameters:
        c - the new color for the background
        See Also:
        setBackground(java.awt.Color)
      • getForeground

        Color getForeground()
        Gets the foreground color of this object.
        Returns:
        the foreground color, if supported, of the object; otherwise, null
        See Also:
        setForeground(java.awt.Color)
      • setForeground

        void setForeground​(Color c)
        Sets the foreground color of this object.
        Parameters:
        c - the new color for the foreground
        See Also:
        getForeground()
      • getCursor

        Cursor getCursor()
        Gets the cursor of this object.
        Returns:
        the cursor, if supported, of the object; otherwise, null
        See Also:
        setCursor(java.awt.Cursor)
      • setCursor

        void setCursor​(Cursor cursor)
        Sets the cursor of this object.
        Parameters:
        cursor - the new cursor for the object
        See Also:
        getCursor()
      • getFont

        Font getFont()
        Gets the font of this object.
        Returns:
        the font, if supported, for the object; otherwise, null
        See Also:
        setFont(java.awt.Font)
      • setFont

        void setFont​(Font f)
        Sets the font of this object.
        Parameters:
        f - the new font for the object
        See Also:
        getFont()
      • getFontMetrics

        FontMetrics getFontMetrics​(Font f)
        Gets the FontMetrics of this object.
        Parameters:
        f - the font for which font metrics is to be obtained
        Returns:
        the FontMetrics, if supported, the object; otherwise, null
        See Also:
        getFont()
      • setEnabled

        void setEnabled​(boolean b)
        Sets the enabled state of the object.
        Parameters:
        b - if true, enables this object; otherwise, disables it
        See Also:
        isEnabled()
      • isVisible

        boolean isVisible()
        Determines if the object is visible. Note: this means that the object intends to be visible; however, it may not be showing on the screen because one of the objects that this object is contained by is currently not visible. To determine if an object is showing on the screen, use isShowing()

        Objects that are visible will also have the AccessibleState.VISIBLE state set in their AccessibleStateSets.

        Returns:
        true if object is visible; otherwise, false
        See Also:
        setVisible(boolean), AccessibleContext.getAccessibleStateSet(), AccessibleState.VISIBLE, AccessibleStateSet
      • setVisible

        void setVisible​(boolean b)
        Sets the visible state of the object.
        Parameters:
        b - if true, shows this object; otherwise, hides it
        See Also:
        isVisible()
      • isShowing

        boolean isShowing()
        Determines if the object is showing. This is determined by checking the visibility of the object and its ancestors. Note: this will return true even if the object is obscured by another (for example, it is underneath a menu that was pulled down).
        Returns:
        true if object is showing; otherwise, false
      • contains

        boolean contains​(Point p)
        Checks whether the specified point is within this object's bounds, where the point's x and y coordinates are defined to be relative to the coordinate system of the object.
        Parameters:
        p - the point relative to the coordinate system of the object
        Returns:
        true if object contains point; otherwise false
        See Also:
        getBounds()
      • getLocationOnScreen

        Point getLocationOnScreen()
        Returns the location of the object on the screen.
        Returns:
        the location of the object on screen; null if this object is not on the screen
        See Also:
        getBounds(), getLocation()
      • getLocation

        Point getLocation()
        Gets the location of the object relative to the parent in the form of a point specifying the object's top-left corner in the screen's coordinate space.
        Returns:
        An instance of Point representing the top-left corner of the object's bounds in the coordinate space of the screen; null if this object or its parent are not on the screen
        See Also:
        getBounds(), getLocationOnScreen()
      • setLocation

        void setLocation​(Point p)
        Sets the location of the object relative to the parent.
        Parameters:
        p - the new position for the top-left corner
        See Also:
        getLocation()
      • getBounds

        Rectangle getBounds()
        Gets the bounds of this object in the form of a Rectangle object. The bounds specify this object's width, height, and location relative to its parent.
        Returns:
        A rectangle indicating this component's bounds; null if this object is not on the screen.
        See Also:
        contains(java.awt.Point)
      • setBounds

        void setBounds​(Rectangle r)
        Sets the bounds of this object in the form of a Rectangle object. The bounds specify this object's width, height, and location relative to its parent.
        Parameters:
        r - rectangle indicating this component's bounds
        See Also:
        getBounds()
      • getSize

        Dimension getSize()
        Returns the size of this object in the form of a Dimension object. The height field of the Dimension object contains this object's height, and the width field of the Dimension object contains this object's width.
        Returns:
        A Dimension object that indicates the size of this component; null if this object is not on the screen
        See Also:
        setSize(java.awt.Dimension)
      • setSize

        void setSize​(Dimension d)
        Resizes this object so that it has width and height.
        Parameters:
        d - The dimension specifying the new size of the object
        See Also:
        getSize()
      • getAccessibleAt

        Accessible getAccessibleAt​(Point p)
        Returns the Accessible child, if one exists, contained at the local coordinate Point.
        Parameters:
        p - The point relative to the coordinate system of this object
        Returns:
        the Accessible, if it exists, at the specified location; otherwise null
      • requestFocus

        void requestFocus()
        Requests focus for this object. If this object cannot accept focus, nothing will happen. Otherwise, the object will attempt to take focus.
        See Also:
        isFocusTraversable()