Module java.desktop
Package javax.swing.plaf.basic

Class BasicSplitPaneDivider.DragController

  • Direct Known Subclasses:
    BasicSplitPaneDivider.VerticalDragController
    Enclosing class:
    BasicSplitPaneDivider
    protected class BasicSplitPaneDivider.DragController
extends Object
    Handles the events during a dragging session for a HORIZONTAL_SPLIT oriented split pane. This continually messages dragDividerTo and then when done messages finishDraggingTo. When an instance is created it should be messaged with isValid to insure that dragging can happen (dragging won't be allowed if the two views can not be resized).

    Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeans™ has been added to the java.beans package. Please see XMLEncoder.

    • Constructor Detail

      • DragController

        protected DragController​(MouseEvent e)
        Constructs a new instance of DragController.
        Parameters:
        e - a mouse event

    • Method Detail

      • isValid

        protected boolean isValid()
        Returns true if the dragging session is valid.
        Returns:
        true if the dragging session is valid

      • positionForMouseEvent

        protected int positionForMouseEvent​(MouseEvent e)
        Returns the new position to put the divider at based on the passed in MouseEvent.
        Parameters:
        e - a mouse event
        Returns:
        the new position

      • getNeededLocation

        protected int getNeededLocation​(int x,
                                int y)
        Returns the x argument, since this is used for horizontal splits.
        Parameters:
        x - an X coordinate
        y - an Y coordinate
        Returns:
        the X argument

      • continueDrag

        protected void continueDrag​(int newX,
                            int newY)
        Messages dragDividerTo with the new location for the mouse event.
        Parameters:
        newX - an X coordinate
        newY - an Y coordinate

      • continueDrag

        protected void continueDrag​(MouseEvent e)
        Messages dragDividerTo with the new location for the mouse event.
        Parameters:
        e - a mouse event

      • completeDrag

        protected void completeDrag​(int x,
                            int y)
        Messages finishDraggingTo with the new location for the mouse event.
        Parameters:
        x - an X coordinate
        y - an Y coordinate

      • completeDrag

        protected void completeDrag​(MouseEvent e)
        Messages finishDraggingTo with the new location for the mouse event.
        Parameters:
        e - a mouse event