Java Swing动画

时间:2015-04-11 17:01:54

标签: java swing animation

我必须做关于电梯管理系统的Java项目。

我的问题出在2 JPanel。首先是JLabelButton,每层一个 - 我使用布局,因为我希望它具有响应性。在程序启动之前我有对话框,我可以设置第一层和最后一层。这是代码:

public void setFloors() {
    floorNavigation = new JPanel();
    floorNavigation.setLayout(new BoxLayout(floorNavigation, BoxLayout.Y_AXIS));
    floorNavigation.add(Box.createVerticalGlue());
    for(JPanel p : floorPanels){
        floorNavigation.add(p);
    }
    floorNavigation.add(Box.createVerticalGlue());
    frame.add(floorNavigation, BorderLayout.LINE_START);
}

public void createFloorPanel() {
    JPanel floorPanel;
    for(JLabel l : floorLabels){
        floorPanel = new JPanel(new FlowLayout());
        floorPanel.add(l);
        floorPanel.add(floorButtons.get(floorLabels.indexOf(l)));
        floorPanels.add(floorPanel);
    }
}

我想将电梯移动动画移动到另一个JLabel中每个JPanel的Y.任何想法如何做到这一点? getY()之类的东西不起作用。

1 个答案:

答案 0 :(得分:0)

如果我理解正确,包含按钮的面板和包含动画的面板将并排放置,从而具有相同的高度。在这种情况下,您可以通过了解面板的当前高度和您拥有的按钮数量来计算Y坐标位置。只需将高度与按钮数量分开,然后乘以您想要到达的楼层数量(请注意,这将以相反的顺序为您提供楼层,自上而下)。

计算完这些位置后,您可以使用简单的线性动画来移动您的电梯" (我猜一个导入的图标或图像)到按钮的相应位置。这是动画的简单模板(小圆圈代表您的电梯图像):

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JButton;
import javax.swing.SwingUtilities;
import javax.swing.SwingWorker;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class SimpleAnimation {

  static int x;
  static int y = 150;
  static int floor_distance = 130;
  static int animation_speed = 10; //less is faster
  static MyDrawPanel panel = new MyDrawPanel();

  public static void main(String[] args) {

    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    final JButton buttonUp = new JButton("Floor Up");
    final JButton buttonDown = new JButton("Floor Down");

    buttonUp.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
      (new AnimatorUp()).execute();
      }
    });

    buttonDown.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
      (new AnimatorDown()).execute();
      }
    });

    frame.getContentPane().add(BorderLayout.NORTH, buttonUp);
    frame.getContentPane().add(BorderLayout.SOUTH, buttonDown);
    frame.getContentPane().add(panel);
    frame.setSize(300,300);
    frame.setVisible(true);
  }

  static class AnimatorUp extends SwingWorker<String, Object> {
    @Override
    public String doInBackground() {
      try {
        x = (int)(panel.getWidth() / 2);
        for(int i = 0; i < floor_distance; i++) {
          y--;
          panel.repaint();
          try{ Thread.sleep(animation_speed); } catch(Exception ex) { ex.printStackTrace(); }
        }
      } catch (Exception ignore) {
      }
      return "";
    }
  }

  static class AnimatorDown extends SwingWorker<String, Object> {
    @Override
    public String doInBackground() {
      try {
        x = (int)(panel.getWidth() / 2);
        for(int i = 0; i < floor_distance; i++) {
          y++;
          panel.repaint();
          try{ Thread.sleep(animation_speed); } catch(Exception ex) { ex.printStackTrace(); }
        }
      } catch (Exception ignore) {
      }
      return "";
    }
  }

  static class MyDrawPanel extends JPanel {
    public void paintComponent(Graphics g) {
      g.fillRect(0, 0, this.getWidth(), this.getHeight());
      g.setColor(new Color(215,215,215));
      x = (int)(panel.getWidth() / 2);
      g.fillOval(x, y, 50, 50);
    }
  }

}

您可以修改此代码,以便按钮触发动画,移动电梯&#34;到特定的楼层。通过计算电梯的当前Y位置之间的差异&#34;和想要的楼层的Y位置,你可以设置要执行的动画的方向和范围。