textureanim.java

java2d的源码分析

        f.pack();
        f.setSize(new Dimension(400,300));
        f.show();
        dp.surface.start();
    }


    static class AnimVal {
        float curval;
        float lowval;
        float highval;
        float currate;
        float lowrate;
        float highrate;

        public AnimVal(int lowval, int highval,
                       int lowrate, int highrate) {
            this.lowval = lowval;
            this.highval = highval;
            this.lowrate = lowrate;
            this.highrate = highrate;
            this.curval = randval(lowval, highval);
            this.currate = randval(lowrate, highrate);
        }

        public AnimVal(int lowval, int highval,
                       int lowrate, int highrate,
                       int pos) {
            this(lowval, highval, lowrate, highrate);
            set(pos);
        }

        public float randval(float low, float high) {
            return (float) (low + Math.random() * (high - low));
        }

        public float getFlt() {
            return curval;
        }

        public int getInt() {
            return (int) curval;
        }

        public void anim() {
            curval += currate;
            clip();
        }

        public void set(float val) {
            curval = val;
            clip();
        }

        public void clip() {
            if (curval > highval) {
                curval = highval - (curval - highval);
                if (curval < lowval) {
                    curval = highval;
                }
                currate = - randval(lowrate, highrate);
            } else if (curval < lowval) {
                curval = lowval + (lowval - curval);
                if (curval > highval) {
                    curval = lowval;
                }
                currate = randval(lowrate, highrate);
            }
        }

        public void newlimits(int lowval, int highval) {
            this.lowval = lowval;
            this.highval = highval;
            clip();
        }
    }  // End AnimVal class


    static class DemoControls extends JPanel implements ActionListener, Runnable {

        TextureAnim demo;
        JToolBar toolbar;
        JComboBox combo;
        Thread thread;
        JMenu menu;
        JMenuItem menuitems[];
        int iconSize = 20;
        

        public DemoControls(TextureAnim demo) {
            this.demo = demo;
            menuitems = new JMenuItem[2];
            setBackground(Color.gray);
            add(toolbar = new JToolBar());
            toolbar.setFloatable(false);
            addTool("BO", "bounce", true);
            addTool("SA", "show anchor", true);
            addTool("RS", "resize", false);
            addTool("RO", "rotate", false);
            addTool("SX", "shear x", false);
            addTool("SY", "shear y", false);
            add(combo = new JComboBox());
            combo.addActionListener(this);
            combo.addItem("8");
            combo.addItem("16");
            combo.addItem("32");
            combo.addItem("64");
            combo.addItem("80");
            combo.setSelectedIndex(2);

            JMenuBar menuBar = new JMenuBar();
            menu = (JMenu) menuBar.add(new JMenu());
            for (int i = 0; i < menuitems.length; i++) {
                BufferedImage bimg = demo.makeImage(iconSize, i);
                TexturedIcon icon = new TexturedIcon(bimg);
                menuitems[i] = menu.add(new JMenuItem(icon));
                menuitems[i].addActionListener(this);
            } 
            menu.setIcon(menuitems[0].getIcon());
            add(menuBar);

            addMouseListener(new MouseAdapter() {
                public void mouseClicked(MouseEvent e) {
                    if (thread == null) start(); else stop();
                }
            });
           demo.bNum = 0;
        }


        public void addTool(String str, String toolTip, boolean state) {
            JButton b = (JButton) toolbar.add(new JButton(str));
            b.setBackground(state ? Color.green : Color.lightGray);
            b.setSelected(state);
            b.setToolTipText(toolTip);
            b.addActionListener(this);
        }


        public void actionPerformed(ActionEvent e) {
            Object obj = e.getSource();
            if (obj instanceof JComboBox) {
                int size = Integer.parseInt((String) combo.getSelectedItem());
                demo.textureImg = demo.makeImage(size, demo.bNum);
            } else if (obj instanceof JMenuItem) {
                for (int i = 0; i < menuitems.length; i++) {
                    if (obj.equals(menuitems[i])) {
                        demo.textureImg = demo.makeImage(demo.tilesize, i);
                        menu.setIcon(menuitems[i].getIcon());
                        break;
                    } 
                }
            } else {
                JButton b = (JButton) obj;
                b.setSelected(!b.isSelected());
                b.setBackground(b.isSelected() ? Color.green : Color.lightGray);
                if (b.getText().equals("BO")) {
                    demo.bouncerect = b.isSelected();
                } else if (b.getText().equals("SA")) {
                    demo.showanchor = b.isSelected();
                } else if (b.getText().equals("RS")) {
                    demo.bouncesize = b.isSelected();
                } else if (b.getText().equals("RO")) {
                    demo.rotate = b.isSelected();
                } else if (b.getText().equals("SX")) {
                    demo.shearx = b.isSelected();
                } else if (b.getText().equals("SY")) {
                    demo.sheary = b.isSelected();
                }
            }
            if (demo.thread == null) {
                demo.repaint();
            }
        }

        public Dimension getPreferredSize() {
            return new Dimension(200,37);
        }

        public void start() {
            if (thread != null) {
                return;
            }
            thread = new Thread(this);
            thread.setPriority(Thread.MIN_PRIORITY);
            thread.setName("Paint.TextureAnim DemoControls Thread");
            thread.start();
        }

        public synchronized void stop() {
            if (thread != null) {
                thread.interrupt();
            }
            thread = null;
            notifyAll();
        }

        public void run() {
            Thread me = Thread.currentThread();
            while (thread == me) {
                for (int i = 2; i < toolbar.getComponentCount(); i++) {
                    try {
                        thread.sleep(4444);
                    } catch (InterruptedException e) { return; }
                    ((JButton) toolbar.getComponentAtIndex(i)).doClick();
                }
            }
            thread = null;
        }


        class TexturedIcon implements Icon {
            BufferedImage bi;
            public TexturedIcon(BufferedImage bi) {
                this.bi = bi;
            }
            public void paintIcon(Component c, Graphics g, int x, int y) {
                Graphics2D g2 = (Graphics2D) g;
                Rectangle r = new Rectangle(x, y, iconSize, iconSize);
                g2.setPaint(new TexturePaint(bi, r));
	        g2.fillRect(x, y, iconSize, iconSize);
	        g2.setColor(Color.gray);
	        g2.draw3DRect(x, y, iconSize-1, iconSize-1, true);
            }
            public int getIconWidth() { return iconSize; }
            public int getIconHeight() { return iconSize; }
        } // End TexturedIcon class
    } // End DemoControls class
} // End TextureAnim class