/** This method cannot be called directly. */
public void actionPerformed(ActionEvent e) {
FileDialog chooser =
new FileDialog(StdDraw.frame, "Use a .png or .jpg extension", FileDialog.SAVE);
chooser.setVisible(true);
String filename = chooser.getFile();
if (filename != null) {
StdDraw.save(chooser.getDirectory() + File.separator + chooser.getFile());
}
}
paintboard1(String s) {
super(s);
addMouseMotionListener(this);
addMouseListener(this);
paintInfo = new Vector();
/* 各工具按钮及选择项 */
// 颜色选择
ColChoice = new Choice();
ColChoice.add("black");
ColChoice.add("red");
ColChoice.add("blue");
ColChoice.add("green");
ColChoice.addItemListener(this);
// 画笔大小选择
SizeChoice = new Choice();
SizeChoice.add("1");
SizeChoice.add("3");
SizeChoice.add("5");
SizeChoice.add("7");
SizeChoice.add("9");
SizeChoice.addItemListener(this);
// 橡皮大小选择
EraserChoice = new Choice();
EraserChoice.add("5");
EraserChoice.add("9");
EraserChoice.add("13");
EraserChoice.add("17");
EraserChoice.addItemListener(this);
// //////////////////////////////////////////////////
toolPanel = new Panel();
clear = new Button("清除");
eraser = new Button("橡皮");
pen = new Button("画笔");
drLine = new Button("画直线");
drCircle = new Button("画圆形");
drRect = new Button("画矩形");
openPic = new Button("打开图画");
savePic = new Button("保存图画");
colchooser = new Button("显示调色板");
// 各组件事件监听
clear.addActionListener(this);
eraser.addActionListener(this);
pen.addActionListener(this);
drLine.addActionListener(this);
drCircle.addActionListener(this);
drRect.addActionListener(this);
openPic.addActionListener(this);
savePic.addActionListener(this);
colchooser.addActionListener(this);
颜色 = new Label("画笔颜色", Label.CENTER);
大小B = new Label("画笔大小", Label.CENTER);
大小E = new Label("橡皮大小", Label.CENTER);
// 面板添加组件
toolPanel.add(openPic);
toolPanel.add(savePic);
toolPanel.add(pen);
toolPanel.add(drLine);
toolPanel.add(drCircle);
toolPanel.add(drRect);
toolPanel.add(颜色);
toolPanel.add(ColChoice);
toolPanel.add(大小B);
toolPanel.add(SizeChoice);
toolPanel.add(colchooser);
toolPanel.add(eraser);
toolPanel.add(大小E);
toolPanel.add(EraserChoice);
toolPanel.add(clear);
// 工具面板到APPLET面板
add(toolPanel, BorderLayout.NORTH);
setBounds(230, 50, 900, 650);
setVisible(true);
validate();
// dialog for save and load
openPicture = new FileDialog(this, "打开图画", FileDialog.LOAD);
openPicture.setVisible(false);
savePicture = new FileDialog(this, "保存图画", FileDialog.SAVE);
savePicture.setVisible(false);
openPicture.addWindowListener(
new WindowAdapter() {
public void windowClosing(WindowEvent e) {
openPicture.setVisible(false);
}
});
savePicture.addWindowListener(
new WindowAdapter() {
public void windowClosing(WindowEvent e) {
savePicture.setVisible(false);
}
});
addWindowListener(
new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
}
public void actionPerformed(ActionEvent e) {
System.out.println("actionPerformed");
if (e.getSource() == pen) // 画笔
{
System.out.println("pen");
toolFlag = 0;
}
if (e.getSource() == eraser) // 橡皮
{
System.out.println("eraser");
toolFlag = 1;
}
if (e.getSource() == clear) // 清除
{
System.out.println("clear");
toolFlag = 2;
paintInfo.removeAllElements();
repaint();
}
if (e.getSource() == drLine) // 画线
{
System.out.println("drLine");
toolFlag = 3;
}
if (e.getSource() == drCircle) // 画圆
{
System.out.println("drCircle");
toolFlag = 4;
}
if (e.getSource() == drRect) // 画矩形
{
System.out.println("drRect");
toolFlag = 5;
}
if (e.getSource() == colchooser) // 调色板
{
System.out.println("colchooser");
Color newColor = JColorChooser.showDialog(this, "我的调色板", c);
c = newColor;
}
if (e.getSource() == openPic) // 打开图画
{
openPicture.setVisible(true);
if (openPicture.getFile() != null) {
int tempflag;
tempflag = toolFlag;
toolFlag = 2;
repaint();
try {
paintInfo.removeAllElements();
File filein = new File(openPicture.getDirectory(), openPicture.getFile());
picIn = new FileInputStream(filein);
VIn = new ObjectInputStream(picIn);
paintInfo = (Vector) VIn.readObject();
VIn.close();
repaint();
toolFlag = tempflag;
} catch (ClassNotFoundException IOe2) {
repaint();
toolFlag = tempflag;
System.out.println("can not read object");
} catch (IOException IOe) {
repaint();
toolFlag = tempflag;
System.out.println("can not read file");
}
}
}
if (e.getSource() == savePic) // 保存图画
{
savePicture.setVisible(true);
try {
File fileout = new File(savePicture.getDirectory(), savePicture.getFile());
picOut = new FileOutputStream(fileout);
VOut = new ObjectOutputStream(picOut);
VOut.writeObject(paintInfo);
VOut.close();
} catch (IOException IOe) {
System.out.println("can not write object");
}
}
}