📄 minidrawpad.java~28~
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jToolBar.add(Stroke);
jToolBar.add(Word);
jToolBar.add(blod);
jToolBar.add(italic);
jToolBar.add(style);
jToolBar.add(size);
contentPane.add(jToolBar, java.awt.BorderLayout.NORTH);
jMenuFile.add(jMenuFileNew);
jMenuFile.add(jMenuFileOpen);
jMenuFile.add(jMenuFileSave);
jMenuFile.addSeparator();
jMenuFile.add(jMenuFileExit);
jMenuColor.add(jMenuColorChoose);
jMenuStroke.add(jMenuStrokeChoose);
jMenuHelp.add(jMenuAbout);
contentPane.add(drawingArea, java.awt.BorderLayout.CENTER);
contentPane.add(statusBar, java.awt.BorderLayout.SOUTH);
jPopupMenu1.add(jMenuItem1);
jPopupMenu1.add(jMenuItem2);
jPopupMenu1.add(jMenuItem3);
createNewItem();
//show();
}
/**
* Help | About action performed.
*
* @param actionEvent ActionEvent
*/
void jMenuHelpAbout_actionPerformed(ActionEvent actionEvent) {
MiniDrawPad_AboutBox dlg = new MiniDrawPad_AboutBox(this);
Dimension dlgSize = dlg.getPreferredSize();
Dimension frmSize = getSize();
Point loc = getLocation();
dlg.setLocation((frmSize.width - dlgSize.width) / 2 + loc.x,
(frmSize.height - dlgSize.height) / 2 + loc.y);
dlg.setModal(true);
dlg.pack();
dlg.setVisible(true);
}
/**鼠标事件mouseA类，继承了MouseAdapter，用来完成鼠标相应事件操作**/
class mouseA extends MouseAdapter{ //鼠标事件mouseA类，继承了MouseAdapter
public void mousePressed(MouseEvent e){ //定义鼠标按下事件
statusBar.setText("当前坐标在:["+e.getX()+","+e.getY()+"]"+"已经画了"+index+"个图...");
//设置状态提示
itemList[index].x1 = itemList[index].x2 = e.getX();//设定坐标X轴
itemList[index].y1 = itemList[index].y2 = e.getY();//设定坐标Y轴
/**如果当前选择的图形是随笔画或者橡皮擦，则进行下面的操作**/
if(currentChoice == 3 || currentChoice == 13){
itemList[index].x1 = itemList[index].x2 = e.getX();//设定坐标X轴
itemList[index].y1 = itemList[index].y2 = e.getY();//设定坐标Y轴
index++; //指针加1
createNewItem(); //创建新图
}
/**如果当前选择的图形式文字输入，则进行下面操作**/
if(currentChoice==18){
itemList[index].x1 = e.getX(); //设定坐标X轴
itemList[index].y1 = e.getY(); //设定坐标Y轴
String input; //输入字符串
input = JOptionPane.showInputDialog(
"请键入文字！"); //显示输入对话框内容
itemList[index].s1 = input;
itemList[index].x2 = f1; //设定坐标X轴
itemList[index].y2 = f2; //设定坐标Y轴
itemList[index].s2 = style1; //设定字体风格
index++; //指针加1
currentChoice = 18;
createNewItem(); //创建新图
drawingArea.repaint(); //图形式文字输入
}
}
/**鼠标释放**/
public void mouseReleased(MouseEvent e){ //定义鼠标释放
statusBar.setText("当前坐标在:["+e.getX()+","+e.getY()+"]"+"已经画了"+index+"个图...");
//设置状态提示
if(currentChoice == 3 || currentChoice == 13){
itemList[index].x1 = e.getX(); //设定坐标X轴
itemList[index].y1 = e.getY(); //设定坐标Y轴
}
itemList[index].x2 = e.getX(); //设定坐标X轴
itemList[index].y2 = e.getY(); //设定坐标Y轴
repaint();
index++; //指针加1
createNewItem(); //创建新图
}
/**鼠标进入**/
public void mouseEntered(MouseEvent e){ //定义鼠标进入
statusBar.setText("当前坐标在:"+e.getX()+","+e.getY()+"]"+"已经画了"+index+"个图...");
} //设置状态提示
/**鼠标退出**/
public void mouseExited(MouseEvent e){ ////定义鼠标退出
statusBar.setText("当前坐标在:"+e.getX()+","+e.getY()+"]"+"已经画了"+index+"个图...");
} //设置状态提示
/**鼠标右键**/
public void mouseClicked(MouseEvent e){ //定义鼠标右键
statusBar.setText("当前坐标在:"+e.getX()+","+e.getY()+"]"+"已经画了"+index+"个图...");
int mods=e.getModifiers(); //设置状态提示
if((mods&InputEvent.BUTTON3_MASK)!=0){ //右键判断
jPopupMenu1.show(drawingArea,e.getX(),e.getY());
//显示快捷菜单
}
}
}//mouseA完成
/**鼠标事件mouseB类继承了MouseMotionAdapter，用来完成鼠标拖动和鼠标移动时的相应操作**/
class mouseB extends MouseMotionAdapter{
/**鼠标拖移**/
public void mouseDragged(MouseEvent e){
statusBar.setText("当前坐标在:["+e.getX()+","+e.getY()+"]"+"已经画了"+index+"个图...");
//设置状态提示
if(currentChoice == 3 || currentChoice == 13){
itemList[index-1].x1 = itemList[index].x2 = itemList[index].x1 = e.getX();//设定坐标X轴
itemList[index-1].y1 = itemList[index].y2 = itemList[index].y1 = e.getY();//设定坐标Y轴
index++; //指针加1
createNewItem(); //创建新图
}
else{
itemList[index].x2 = e.getX(); //设定坐标X轴
itemList[index].y2 = e.getY(); //设定坐标Y轴
}
repaint(); //重画
}
/**鼠标移动**/
public void mouseMoved(MouseEvent e){
statusBar.setText("当前坐标在:["+e.getX()+","+e.getY()+"]"+"已经画了"+index+"个图...");
} //设置状态提示
}
/**选择字体风格时候用到的时间侦听器类，加入到字体风格的选择框中**/
//checkBoxHandler类继承ItemListener
private class checkBoxHandler implements ItemListener{
public void itemStateChanged(ItemEvent e){ //定义字体改变事件
if(e.getSource() == blod)
if(e.getStateChange() == ItemEvent.SELECTED)
f1 = Font.BOLD;
else
f1 = Font.PLAIN;
if(e.getSource() == italic)
if(e.getStateChange() == ItemEvent.SELECTED)
f2 = Font.ITALIC;
else
f2 = Font.PLAIN;
}
}
/**画图板面板类，用来画图**/
class DrawPanel extends JPanel{ //画图面板类继承JPanel
/**定义画图面板**/
public DrawPanel(){ //定义画图面板
setCursor(Cursor.getPredefinedCursor(Cursor.CROSSHAIR_CURSOR));
//设置光标
setBackground(Color.white); //设置背景色为白色
addMouseListener(new mouseA()); //添加鼠标mouseA类侦听
addMouseMotionListener(new mouseB()); //添加鼠标mouseb类侦听
}
public void paintComponent(Graphics g){ //调用该UI委托的paint方法
super.paintComponent(g); //定义绘画组件
Graphics2D g2d = (Graphics2D)g; //定义画笔
int j = 0;
while(j <= index){
draw(g2d,itemList[j]);
j++;
}
}
void draw(Graphics2D g2d,drawings i){
i.draw(g2d); //将画笔传入到各个子类中，用来完成各自的绘图
}
}
/**新建一个画图基本单元对象的程序段**/
void createNewItem(){
if(currentChoice == 18) //进行相应的游标设置
drawingArea.setCursor(Cursor.getPredefinedCursor(Cursor.TEXT_CURSOR));
else
drawingArea.setCursor(Cursor.getPredefinedCursor(Cursor.CROSSHAIR_CURSOR));
switch(currentChoice){
case 3:
itemList[index] = new Pencil(); //随笔化
break;
case 4:
itemList[index] = new Line(); //直线
break;
case 5:
itemList[index] = new Rect(); //矩形
break;
case 6:
itemList[index] = new fillRect(); //填充矩形
break;
case 7:
itemList[index] = new Oval(); //椭圆
break;
case 8:
itemList[index] = new fillOval(); //填充椭圆
break;
case 9:
itemList[index] = new Circle(); //圆形
break;
case 10:
itemList[index] = new fillCircle(); //填充圆形
break;
case 11:
itemList[index] = new RoundRect(); //圆角矩形
break;
case 12:
itemList[index] = new fillRoundRect();//填充圆角矩形
break;
case 13:
itemList[index] = new Rubber(); //橡皮擦
break;
case 14:
itemList[index] = new Polygon1(); //三角形
break;
case 15:
itemList[index] = new fillPolygon1();//填充三角形
break;
case 16: //撤销
if(x==0){
index = index - 2;
repaint();
x=x+2;
}
else{
index = index -1;
repaint();
x = x + 1;
}
break;
case 17: //重画
index = index + 1;
repaint();
x = x - 1;
break;
case 18:
itemList[index] = new Word(); //文字
break;
}
itemList[index].type = currentChoice; //当前颜色
itemList[index].R = R;
itemList[index].G = G;
itemList[index].B = B;
itemList[index].stroke = stroke; //当前粗细
}
/**选择当前颜色程序段**/
public void chooseColor(){
color = JColorChooser.showDialog(MiniDrawPad.this,"请选择颜色",color);
R = color.getRed();
G = color.getGreen();
B = color.getBlue(); //得到颜色
itemList[index].R = R;
itemList[index].G = G;
itemList[index].B = B; //保存为当前颜色
}
/**选择当前线条粗细程序段**/
public void setStroke(){
String input; //从对话框得到画笔粗细值
input = JOptionPane.showInputDialog("请键入画笔粗细值(大于0且小于100)");
stroke = Float.parseFloat(input);
itemList[index].stroke = stroke; //保存为当前画笔粗细值
}
/**保存图形文件程序段**/
public void saveFile(){
JFileChooser fileChooser = new JFileChooser();
fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
int result = fileChooser.showSaveDialog(this);
if(result == JFileChooser.CANCEL_OPTION)
return;
File fileName = fileChooser.getSelectedFile();
fileName.canWrite();
if(fileName == null || fileName.getName().equals(""))
JOptionPane.showMessageDialog(fileChooser,"Invalid File Name",
"Invalid File Name",JOptionPane.ERROR_MESSAGE);
else{
try{
fileName.delete();
FileOutputStream fos = new FileOutputStream(fileName);
output = new ObjectOutputStream(fos);
drawings record;
output.writeInt(index);
for(int i=0;i<index;i++){
drawings p = itemList[i];
output.writeObject(p);
output.flush(); //将所有图形信息强制转换成父类线性化存储到文件中
}
output.close();
fos.close();
}
catch(IOException ioe){
ioe.printStackTrace();
}
}
}
/**打开一个图形文件程序段**/
public void loadFile(){
JFileChooser fileChooser = new JFileChooser();
fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
int result = fileChooser.showOpenDialog(this);
if(result == JFileChooser.CANCEL_OPTION)
return;
File fileName = fileChooser.getSelectedFile();
fileName.canRead();
if(fileName == null || fileName.getName().equals(""))
JOptionPane.showMessageDialog(fileChooser,"Invalid File Name",
"Invalid File Name",JOptionPane.ERROR_MESSAGE);
else{
try{
FileInputStream fis = new FileInputStream(fileName);
input = new ObjectInputStream(fis);
drawings inputRecord;
int countNumber = 0;
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