com.formdev.flatlaf.ui.FlatViewportUI Maven / Gradle / Ivy
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/*
* Copyright 2019 FormDev Software GmbH
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.formdev.flatlaf.ui;
import java.awt.Component;
import java.awt.Graphics;
import javax.swing.JComponent;
import javax.swing.JViewport;
import javax.swing.plaf.ComponentUI;
import javax.swing.plaf.basic.BasicViewportUI;
/**
* Provides the Flat LaF UI delegate for {@link javax.swing.JViewport}.
*
*
*
* @uiDefault Viewport.font Font unused
* @uiDefault Viewport.background Color
* @uiDefault Viewport.foreground Color unused
*
* @author Karl Tauber
*/
public class FlatViewportUI
extends BasicViewportUI
{
public static ComponentUI createUI( JComponent c ) {
return FlatUIUtils.createSharedUI( FlatViewportUI.class, FlatViewportUI::new );
}
@Override
public void paint( Graphics g, JComponent c ) {
super.paint( g, c );
Component view = ((JViewport)c).getView();
if( view instanceof JComponent ) {
ComponentUI ui = JavaCompatibility2.getUI( (JComponent) view );
if( ui instanceof ViewportPainter )
((ViewportPainter)ui).paintViewport( g, (JComponent) view, (JViewport) c );
}
}
//---- interface ViewportPainter ------------------------------------------
/**
* @since 2.3
*/
public interface ViewportPainter {
void paintViewport( Graphics g, JComponent c, JViewport viewport );
}
}