我想实现KeyListiner,以便在按下Space键时,程序会生成Function类的新对象并绘制表示该函数的新图像。目前程序正在运行,但是按空格键不允许生成新图像。每个建议将不胜感激:)
主班:
public class Main {
public static void main(String[] args) {
JFrame window = new JFrame(SOFTWARE_TITLE);
MainView mainView = new MainView();
Key key = new Key();
Controller controller = new Controller(mainView);
key.setController(controller);
window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
window.setSize(790, 580);
window.setLocationRelativeTo(null);
window.setResizable(false);
window.add(mainView);
window.setVisible(true);
}
}
MainView类:
public class MainView extends JPanel {
private Function function;
public MainView(){
super();
setBackground(Color.GRAY);
setLayout(null);
setSize(200, 200);
function = new Function();
DrawBoard drawBoard = new DrawBoard(function);
drawBoard.setSize(500, 500);
drawBoard.setBackground(Color.lightGray);
drawBoard.setLocation(250, 20);
add(drawBoard);
setVisible(true);
}
}
DrawBoard类:
public class DrawBoard extends Canvas {
short CUSTOM_WIDTH = 5 * 100;
private Function function;
public DrawBoard(Function function) {
this.function = function;
}
public void paint(Graphics g) {
double difference = function.getzMax() - function.getzMin();
for (int indexX = 0; indexX < 100; indexX++) {
for (int indexY = 0; indexY < 100; indexY++) {
double value = function.getPoints()[indexX][indexY].getZ() - function.getzMin();
double corrected = setFloatInRGBRange(difference, value);
g.setColor(intToColor((int) corrected));
g.fillRect(indexX * 5, CUSTOM_WIDTH - ((indexY+1) * 5), 5, 5);
}
}
}
public Color intToColor(int colNum){
return new Color(colNum, colNum, colNum);
}
private int setFloatInRGBRange(double difference, double value){
return (int) ((255 * value)/difference);
}
}
关键类别:
public class Key implements KeyListener {
Controller controller;
public void setController(Controller controller) {
this.controller = controller;
}
@Override
public void keyTyped(KeyEvent e) {
}
@Override
public void keyPressed(KeyEvent e) {
}
@Override
public void keyReleased(KeyEvent e) {
if (e.getKeyChar() == KeyEvent.VK_SPACE){
controller.generateFormula();
}
}
}
控制器类:
public class Controller {
MainView mainView;
public Controller(MainView mainView) {
this.mainView = mainView;
}
public void generateFormula() {
this.mainView = new MainView();
}
}
最佳答案
您发布的代码中还需要检查其他一些内容。但是,对于您主要关心的问题,我想您不能正确检查按键。
我将使用e.getKeyCode()
而不是e.getKeyChar()
来检查事件。
因此您的条件将是:e.getKeyCode() == KeyEvent.VK_SPACE
它不合主题,但是:
不需要在多个类中使用Function
。它只能在DrawBoard
中使用
不要像其他已经建议的那样混合使用Swing和AWT组件