我正在使用一个简单的番茄钟计时器,但我没有声音/扬声器,所以我想通过简单地用指定的颜色消隐屏幕,然后用另一种颜色切换几次来发出计时器的结束信号。好像我让我的显示器左转车信号。我该如何控制显示器?是否有一些win32代码?
我熟悉Java,而不熟悉c#或C ++
答案 0 :(得分:7)
我不确定控制整个屏幕的动机是什么。也许更合适的是在系统托盘中显示通知。
无论如何,使用Java可以在全屏模式下弹出JFrame
。使用计时器多次更改其背景,然后关闭它。这是一个演示类似的简化示例:
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.GraphicsEnvironment;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import javax.swing.AbstractAction;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.KeyStroke;
import javax.swing.Timer;
class FullScreenFrame extends JFrame{
private static final int MAX_COUNT = 3;
private static final int PERIOD = 1000;
private JPanel panel;
private int count;
public FullScreenFrame(){
super();
setUndecorated(true);
getRootPane().getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0, false), "ESCAPE");
getRootPane().getActionMap().put("ESCAPE", new AbstractAction() {
public void actionPerformed(ActionEvent e) {
dispose();
}
});
panel = new JPanel();
panel.setBackground(Color.GREEN);
add(panel);
new Timer(PERIOD, new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
if (count < MAX_COUNT) {
if (count % 2 == 0){
panel.setBackground(Color.BLACK);
} else {
panel.setBackground(Color.GREEN);
}
count++;
} else {
((Timer) e.getSource()).stop();
dispose();
}
}
}).start();
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
FullScreenFrame frame = new FullScreenFrame();
frame.setBounds(GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().getDefaultConfiguration().getBounds());
frame.setAlwaysOnTop(true);
frame.setVisible(true);
}
});
}
}