com.intellij.openapi.ui.TitlePanel.java Source code

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Here is the source code for com.intellij.openapi.ui.TitlePanel.java

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// Copyright 2000-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.

/*
 * @author max
 */
package com.intellij.openapi.ui;

import com.intellij.ui.Gray;
import com.intellij.ui.JBColor;
import com.intellij.ui.paint.LinePainter2D;
import com.intellij.util.ui.UIUtil;

import javax.swing.*;
import java.awt.*;
import java.awt.geom.RoundRectangle2D;

public final class TitlePanel extends JPanel {
    public TitlePanel(String title, String description) {
        super(new BorderLayout());
        JLabel label = new JLabel(title);
        add(label, BorderLayout.NORTH);
        label.setOpaque(false);
        Font font = label.getFont();
        label.setFont(font.deriveFont(Font.BOLD, font.getSize() + 2));
        if (description != null) {
            label.setBorder(BorderFactory.createEmptyBorder(10, 10, 5, 10));
            JLabel descriptionLabel = new JLabel(description);
            descriptionLabel.setBorder(BorderFactory.createEmptyBorder(0, 10, 10, 10));
            add(descriptionLabel, BorderLayout.CENTER);
        } else {
            label.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
        }
    }

    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        Graphics2D g2 = (Graphics2D) g;
        int width = getSize().width;
        int height = getSize().height;
        Object oldAntialiasing = g2.getRenderingHint(RenderingHints.KEY_ANTIALIASING);
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        g2.setPaint(new JBColor(Gray._247, UIUtil.getPanelBackground()));
        RoundRectangle2D rect = new RoundRectangle2D.Double(0, 0, width - 1, height - 1, 0, 0);
        g2.fill(rect);
        g2.setPaint(new JBColor(Color.GRAY, Gray._100));
        LinePainter2D.paint((Graphics2D) g2, 0, height - 1, width - 1, height - 1);
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, oldAntialiasing);
    }
}