design/designer-base/src/main/java/com/fr/design/mainframe/OpenLoadingPane.java

package com.fr.design.mainframe;

import com.fr.design.gui.ilable.UILabel;
import java.awt.Color;
import java.awt.Component;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.LayoutManager;
import javax.swing.ImageIcon;
import javax.swing.JPanel;

/**
 * @author hades
 * @version 10.0
 * Created by hades on 2021/4/9
 */
public class OpenLoadingPane extends JPanel {

    private static final ImageIcon LOADING_ICON = new ImageIcon(OpenLoadingPane.class.getResource("/com/fr/design/images/mainframe/loading.gif"));

    private UILabel loadingLabel;

    public OpenLoadingPane() {

        setLayout(new LayoutManager() {

            @Override
            public void removeLayoutComponent(Component comp) {
            }

            @Override
            public Dimension preferredLayoutSize(Container parent) {
                return parent.getPreferredSize();
            }

            @Override
            public Dimension minimumLayoutSize(Container parent) {
                return null;
            }

            @Override
            public void layoutContainer(Container parent) {
                int width = parent.getParent().getWidth();
                int height = parent.getParent().getHeight();
                int loadingLabelWidth = loadingLabel.getPreferredSize().width;
                int loadingLabelHeight = loadingLabel.getPreferredSize().height;
                int loadingLabelX = (width - loadingLabelWidth) / 2;
                int loadingLabelY = (height - loadingLabelHeight) / 2;
                loadingLabel.setBounds(loadingLabelX, loadingLabelY, loadingLabelWidth, loadingLabelHeight);
            }

            @Override
            public void addLayoutComponent(String name, Component comp) {
            }
        });
        setBackground(Color.WHITE);
        loadingLabel = new UILabel(LOADING_ICON);
        add(loadingLabel);

    }
}