Interface LayoutManager

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Interface LayoutManager

public interface netscape.application.LayoutManager
{
    /* Methods
     */
    public abstract void addSubview(View);
    public abstract void layoutView(View, int, int);
    public abstract void removeSubview(View);
}

Interface for objects interested in acting as a LayoutManager, an object which determines the size and position of a View's subviews. Views automatically call their LayoutManager's layoutView() method from their didSizeBy() method (in response to a resize), so that the LayoutManager can adjust the View's subviews' sizes and positions. Views also call their LayoutManager's addSubview() and removeSubview() methods as they gain and lose subviews. In response, a LayoutManager can immediately relayout the View's subviews, or do nothing until all modifications have been made to the View. In this case, layoutView() must be called explicitly once the modifications have been completed.

See Also:: setLayoutManager

Methods

addSubview

  public abstract void addSubview(View aView)

Notifies the LayoutManager that aView has been added to the View hierarchy.

removeSubview

  public abstract void removeSubview(View aView)

Notifies the LayoutManager that aView has been removed from the View hierarchy.

layoutView

  public abstract void layoutView(View aView,
                                  int deltaWidth,
                                  int deltaHeight)

Requests that the LayoutManager position aView's subviews. A View calls layoutView() from its didSizeBy() method. deltaWidth and deltaHeight represent the delta between aView's old size and its current size.

See Also:: didSizeBy

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