Java小程式之高階畫板重繪篇I
阿新 • • 發佈：2019-01-05
package com.huaxin.zhou; import java.awt.BasicStroke; import java.awt.BorderLayout; import java.awt.Color; import java.awt.Dimension; import java.awt.FlowLayout; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.Stroke; import java.util.ArrayList; import javax.swing.ButtonGroup; import javax.swing.ImageIcon; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JMenu; import javax.swing.JMenuBar; import javax.swing.JMenuItem; import javax.swing.JPanel; import javax.swing.JRadioButton; import javax.swing.border.BevelBorder; public class Mypaint extends JFrame{ public ArrayList list = new ArrayList(); public Color color=Color.BLACK; public JButton btt; public void initFrame(){ //設定窗體屬性 this.setSize(600,500); this.setDefaultCloseOperation(3); this.setTitle("我的畫板"); this.setLocationRelativeTo(null); //給窗體新增主面板 JPanel panel = new JPanel(); //設定窗體佈局 panel.setLayout(new BorderLayout()); //新增主面板 this.add(panel); //給窗體新增選單 JMenuBar bar= new JMenuBar(); panel.add(bar,BorderLayout.NORTH); String []str={"檔案","檢視","幫助","檢視"}; String []str1={"開啟檔案","檢視檔案","幫助","檢視"}; for(int i=0;i<4;i++){ JMenu menu = new JMenu(str[i]); for(int j=0;j<4;j++){ JMenuItem item = new JMenuItem(str1[j]); menu.add(item); } bar.add(menu); } //新增中間面板 JPanel panelcenter = new JPanel(); panelcenter.setLayout(new FlowLayout(FlowLayout.LEFT,10,10)); panel.setBackground(Color.gray); panel.add(panelcenter); //新增中間面板的子面板 JPanel panelcenterchild = new JPanel(){ //畫板重繪 public void paint(Graphics g1) { super.paint(g1); Graphics2D g=(Graphics2D)g1; for (int i = 0; i <list.size(); i++) { //如果容器中使直線物件，則重新繪製直線 if(list.get(i) instanceof Line){ Line line = (Line)list.get(i); g.setColor(line.color); Stroke s =(BasicStroke)(line.s); g.setStroke(s); g.drawLine(line.x1, line.y1, line.x2, line.y2); } //重新繪製矩形 else if(list.get(i) instanceof Rect){ Rect rect = (Rect)list.get(i); g.setColor(rect.color); Stroke s =(BasicStroke)(rect.s); g.setStroke(s); g.drawRect(rect.x1, rect.y1,rect.x2, rect.y2); }//重繪橢圓 else if(list.get(i) instanceof Oval){ Oval oval = (Oval)list.get(i); g.setColor(oval.color); Stroke s =(BasicStroke)(oval.s); g.setStroke(s); g.drawOval(oval.x1, oval.y1, oval.x2, oval.y2); } //噴桶重繪 else if(list.get(i) instanceof Point){ Point point = (Point)list.get(i); g.setColor(point.color); Stroke s =(BasicStroke)(point.s); g.setStroke(s); g.drawLine(point.x1, point.y1,point.x1,point.y1); } //圓角矩形重繪 else if(list.get(i) instanceof RoundRect){ RoundRect rr = (RoundRect)list.get(i); g.setColor(rr.color); Stroke s =(BasicStroke)(rr.s); g.setStroke(s); g.drawRoundRect(rr.x1,rr.y1,rr.x2,rr.y2,rr.i,rr.j); } } } }; panelcenterchild.setBackground(Color.WHITE); panelcenterchild.setPreferredSize(new Dimension(500,330)); panelcenter.add(panelcenterchild); //新增左邊面板 JPanel panelleft = new JPanel(); panelleft.setLayout(new FlowLayout(FlowLayout.LEFT,0,0)); panelleft.setBackground(new Color(235,233,238)); panelleft.setPreferredSize(new Dimension(50, 0)); //給左邊面板新增按鈕 ButtonGroup bg = new ButtonGroup(); for(int i=0;i<16;i++){ //給每個按鈕新增四種不同的圖片 ImageIcon img1 = new ImageIcon("images/draw"+i+".jpg"); ImageIcon img2 = new ImageIcon("images/draw"+i+"-1"+".jpg"); ImageIcon img3 = new ImageIcon("images/draw"+i+"-2"+".jpg"); ImageIcon img4 = new ImageIcon("images/draw"+i+"-3"+".jpg"); JRadioButton jrb = new JRadioButton(); jrb.setActionCommand("pic"+i); //設定預設選中項 if(i==10){ jrb.setSelected(true); } bg.add(jrb); jrb.setIcon(img1);//設定預設圖譜按 jrb.setRolloverIcon(img2);//設定滑鼠停留在按鈕上的圖片 jrb.setPressedIcon(img3);//設定滑鼠按下按鈕的圖譜按 jrb.setSelectedIcon(img4);//設定滑鼠選中按鈕的圖片 jrb.setBorder(null);//設定按鈕的邊框為空，按鈕凹下去效果 panelleft.add(jrb); } //下邊面板 JPanel paneldown = new JPanel(); paneldown.setBackground(Color.gray); paneldown.setLayout(null); paneldown.setPreferredSize(new Dimension(0, 80)); //下邊面板的子面板 JPanel paneldownchild = new JPanel(); paneldownchild.setLayout(null); paneldownchild.setBounds(15, 10, 300, 60); paneldownchild.setBackground(Color.green); //子面板中的左面板 JPanel downleft = new JPanel(); downleft.setLayout(null); downleft.setBackground(Color.white); downleft.setBounds(0, 0, 60, 60); //子面板中的右面板 JPanel downright = new JPanel(); downright.setBackground(Color.magenta); downright.setLayout(new FlowLayout(FlowLayout.LEFT,0,0)); downright.setBounds(60, 0, 240, 60); //子面板新增到相應的父面板中 panel.add(panelleft,BorderLayout.WEST); panel.add(paneldown, BorderLayout.SOUTH); paneldown.add(paneldownchild); paneldownchild.add(downleft); paneldownchild.add(downright); //面板中新增兩個顏色按鈕 btt = new JButton(); btt.setBackground(Color.black); btt.setBounds(10, 10, 30, 30); JButton bt1 = new JButton(); bt1.setBackground(Color.white); bt1.setBounds(25, 25, 30, 30); downleft.add(btt); downleft.add(bt1); //設定按鈕特效 BevelBorder bb = new BevelBorder(0,Color.gray,Color.white); BevelBorder bb1 = new BevelBorder(1,Color.gray,Color.white); downleft.setBorder(bb); btt.setBorder(bb1); bt1.setBorder(bb1); //給新增右面板顏色按鈕 ButtonListener bl= new ButtonListener(this);//按鈕監聽器 Color colors[] ={Color.BLUE,Color.red,Color.black,Color.ORANGE,Color.gray, Color.CYAN,Color.GREEN,Color.YELLOW,Color.PINK,Color.magenta,new Color(234,45,78),new Color(67,123,9)}; for(int i=0;i<12;i++){ JButton bt3 = new JButton(); bt3.setBackground(colors[i]); bt3.setBorder(bb); bt3.setPreferredSize(new Dimension(40,30)); //給每個按鈕新增按鈕監聽器 bt3.addActionListener(bl); downright.add(bt3); } this.setVisible(true); //拿到白色畫板的畫筆 Graphics g=panelcenterchild.getGraphics(); DrawListener dl = new DrawListener(g,bg,this,list); //白色畫板新增 panelcenterchild.addMouseListener(dl); panelcenterchild.addMouseMotionListener(dl); } }
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