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Text File | 1999-05-28 | 1.9 KB | 51 lines | [TEXT/CWIE] |
- // ScrollingTarget.java
- // By Ned Etcode
- // Copyright 1995, 1996, 1997 Netscape Communications Corp. All rights reserved.
-
- package netscape.application;
-
- /** Interface for objects interested in being controlled by a ScrollBar, such
- * as a ScrollView.
- * @see ScrollBar
- * @see ScrollView
- * @see ScrollGroup
- */
- public interface Scrollable {
- /** Axis value indicating a Horizontal scroller. */
- public static final int HORIZONTAL = 0;
-
- /** Axis value indicating a Vertical scroller. */
- public static final int VERTICAL = 1;
-
- /** This method should return the total length of the visible scroll area.
- * This length determines the percent visible area, which sets the
- * scroller knob size. <b>axis</b> indicates the scrolling direction,
- * either VERTICAL or HORIZONTAL.
- */
- public int lengthOfScrollViewForAxis(int axis);
-
- /** This method should return the total length of the View being scrolled.
- * This length determines the percent visible area, which sets the
- * scroller knob size. <b>axis</b> indicates the scrolling direction,
- * either VERTICAL or HORIZONTAL.
- */
- public int lengthOfContentViewForAxis(int axis);
-
- /** This method should return the visible scroll area's origin
- * relative to the origin of the View being scrolled. This position
- * determines the scroller knob's position. <b>axis</b> indicates the
- * scrolling direction, either VERTICAL or HORIZONTAL.
- */
- public int positionOfContentViewForAxis(int axis);
-
- /** This method tells the Scrollable to change the origin of the View
- * it's scrolling to (<b>x</b>, <b>y</b>)
- */
- public void scrollTo(int x, int y);
-
- /** This method tells the Scrollable to move the origin of the View
- * it's scrolling by (<b>deltaX</b>, <b>deltaY</b>)
- */
- public void scrollBy(int deltaX, int deltaY);
- }
-