org.netbeans.modules.visual.layout.CardLayout Maven / Gradle / Ivy
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package org.netbeans.modules.visual.layout;
import org.netbeans.api.visual.widget.Widget;
import org.netbeans.api.visual.layout.Layout;
import java.awt.*;
/**
* @author David Kaspar
*/
public final class CardLayout implements Layout {
private static final Point POINT_EMPTY = new Point ();
private static final Rectangle RECTANGLE_EMPTY = new Rectangle ();
private Widget cardLayoutWidget;
private Widget activeChildWidget;
public CardLayout (Widget cardLayoutWidget) {
assert cardLayoutWidget != null;
this.cardLayoutWidget = cardLayoutWidget;
cardLayoutWidget.setCheckClipping (true);
}
public Widget getActiveChildWidget () {
return activeChildWidget;
}
public void setActiveChildWidget (Widget activeChildWidget) {
this.activeChildWidget = activeChildWidget;
cardLayoutWidget.revalidate ();
}
public void layout (Widget widget) {
assert widget == cardLayoutWidget;
Point preferredLocation = null;
Rectangle preferredBounds = null;
if (activeChildWidget != null && activeChildWidget.isVisible ())
for (Widget child : cardLayoutWidget.getChildren ())
if (child == activeChildWidget) {
preferredLocation = child.getPreferredLocation ();
preferredBounds = child.getPreferredBounds ();
break;
}
if (preferredLocation == null)
preferredLocation = POINT_EMPTY;
if (preferredBounds == null)
preferredBounds = RECTANGLE_EMPTY;
Rectangle otherBounds = new Rectangle (preferredBounds.x, preferredBounds.y, 0, 0);
for (Widget child : cardLayoutWidget.getChildren ())
child.resolveBounds (preferredLocation, child == activeChildWidget ? preferredBounds : otherBounds);
}
public boolean requiresJustification (Widget widget) {
return true;
}
public void justify (Widget widget) {
assert widget == cardLayoutWidget;
if (activeChildWidget != null && activeChildWidget.isVisible ())
for (Widget child : cardLayoutWidget.getChildren ())
if (child == activeChildWidget) {
Rectangle bounds = widget.getClientArea ();
Point location = child.getLocation ();
Rectangle childBounds = child.getBounds ();
bounds.translate (- location.x, - location.y);
childBounds.add (bounds);
child.resolveBounds (location, bounds);
return;
}
}
}