调整JScrollPane的大小以考虑Windows任务栏

Question

我正在开始这个新问题，因为this question已被投票结束，因为它没有MVCE。

我现在已经将问题包含在SSCCE中了。

请查看以下代码

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

public class ScrollPaneTest {

public static void main(String[] args) {
    SwingUtilities.invokeLater(new Runnable() {
        @Override
        public void run() {
            JFrame frame=new JFrame();
            frame.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);

            JTabbedPane tabbedPane=new JTabbedPane();


            tabbedPane.addTab("Tab 1", new JScrollPane(getPanel()));
            tabbedPane.addTab("Tab 2", new JScrollPane(getPanel()));

            frame.setContentPane(tabbedPane);
            frame.pack();
            frame.setVisible(true);
        }



        private JPanel getPanel() {
            JPanel panel=new JPanel();
            Box box = Box.createVerticalBox();
            for (int i = 1; i <= 100; i++) {
                box.add(new JLabel("This is Label #" + i));
            }
            panel.add(box);
            return panel;
        }
    });
  }
} 

当我运行此代码时，我得到一个如下所示的框架

如果我添加

，请使用相同的代码

 frame.setExtendedState(JFrame.MAXIMIZED_BOTH); 

然后框架位于任务栏上方。我希望我的JFrame停在窗口任务栏的上方。

Answer 1

这基本上有点hacky。

这样做是使用屏幕边界减去它的插图，不仅可以计算窗口的高度，还可以计算鼓励窗口出现在可用桌面空间内的位置。

主要原因是我将任务栏固定在屏幕顶部...

import java.awt.GraphicsConfiguration;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.Insets;
import java.awt.Rectangle;
import java.awt.Toolkit;
import javax.swing.Box;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTabbedPane;
import javax.swing.SwingUtilities;
import javax.swing.WindowConstants;

public class ScrollPaneTest {

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                JFrame frame = new JFrame();
                frame.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);

                JTabbedPane tabbedPane = new JTabbedPane();

                tabbedPane.addTab("Tab 1", new JScrollPane(getPanel()));
                tabbedPane.addTab("Tab 2", new JScrollPane(getPanel()));

                frame.setContentPane(tabbedPane);
                frame.pack();
                Rectangle viewBounds = getScreenViewableBounds();
                frame.setSize(frame.getWidth(), viewBounds.height);
                frame.setLocation(viewBounds.x, viewBounds.y);
                frame.setVisible(true);
            }

            private JPanel getPanel() {
                JPanel panel = new JPanel();
                Box box = Box.createVerticalBox();
                for (int i = 1; i <= 100; i++) {
                    box.add(new JLabel("This is Label #" + i));
                }
                panel.add(box);
                return panel;
            }
        });
    }

    public static Rectangle getScreenViewableBounds() {

        GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
        GraphicsDevice gd = ge.getDefaultScreenDevice();

        Rectangle bounds = new Rectangle(0, 0, 0, 0);

        if (gd != null) {

            GraphicsConfiguration gc = gd.getDefaultConfiguration();
            bounds = gc.getBounds();

            Insets insets = Toolkit.getDefaultToolkit().getScreenInsets(gc);

            bounds.x += insets.left;
            bounds.y += insets.top;
            bounds.width -= (insets.left + insets.right);
            bounds.height -= (insets.top + insets.bottom);

        }

        return bounds;

    }
}

您可能还希望考虑使用Scrollable界面来限制可见区域，例如......

import java.awt.Dimension;
import java.awt.GraphicsConfiguration;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.Insets;
import java.awt.Rectangle;
import java.awt.Toolkit;
import javax.swing.Box;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTabbedPane;
import javax.swing.Scrollable;
import javax.swing.SwingUtilities;
import javax.swing.WindowConstants;

public class ScrollPaneTest {

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                JFrame frame = new JFrame();
                frame.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);

                JTabbedPane tabbedPane = new JTabbedPane();

                tabbedPane.addTab("Tab 1", new JScrollPane(getPanel()));
                tabbedPane.addTab("Tab 2", new JScrollPane(getPanel()));

                frame.setContentPane(tabbedPane);
                frame.pack();
                frame.setVisible(true);
            }

            private JPanel getPanel() {
                JPanel panel = new ScrollablePane();
                Box box = Box.createVerticalBox();
                for (int i = 1; i <= 100; i++) {
                    box.add(new JLabel("This is Label #" + i));
                }
                panel.add(box);
                return panel;
            }
        });
    }

    public static class ScrollablePane extends JPanel implements Scrollable {

        @Override
        public Dimension getPreferredScrollableViewportSize() {
            return new Dimension(200, 400);
        }

        @Override
        public int getScrollableUnitIncrement(Rectangle visibleRect, int orientation, int direction) {
            return 32;
        }

        @Override
        public int getScrollableBlockIncrement(Rectangle visibleRect, int orientation, int direction) {
            return 32;
        }

        @Override
        public boolean getScrollableTracksViewportWidth() {
            return false;
        }

        @Override
        public boolean getScrollableTracksViewportHeight() {
            return false;
        }

    }
}