swing 学习笔记六(对话框Dialog )

/**

* 对话框

*

* @time 11:09:20 AM

* @author retacn yue

* @Email zhenhuayue@sina.com

*/

public class Test_Dialog extends Frame {

private static final long serialVersionUID = 1L;

TextField rows = new TextField("3");

TextField cols = new TextField("3");

/**

* 构造器

*

* @param owner

*/

public Test_Dialog() {

setTitle("Dialog Test");

// 实例化面板

Panel panel = new Panel();

panel.setLayout(new GridLayout(2, 2));

panel.add(new Label("Row", Label.CENTER));

panel.add(rows);

panel.add(new Label("Columns", Label.CENTER));

panel.add(cols);

// 将面板添加到帧窗口

add("North", panel);

add("South", new Button("GO"));

}

public boolean handleEvent(Event event) {

if (event.id == Event.WINDOW_DESTROY) {

System.exit(0);

} else {

return super.handleEvent(event);

}

return true;

}

public boolean action(Event event, Object object) {

if (object.equals("GO")) {

// 弹绘制差图对话框

Dialog dialog = new TestDialog(this, Integer.parseInt(rows.getText()), Integer.parseInt(cols.getText()));

dialog.show();

} else {

return super.action(event, object);

}

return true;

}

public static void main(String[] args) {

Test_Dialog dialog = new Test_Dialog();

dialog.resize(200, 100);

dialog.show();

}

}

/**

* 自定义对话框

*/

class TestDialog extends Dialog {

private static final long serialVersionUID = 1L;

static final int BLANK = 0;

static final int XX = 1;

static final int OO = 2;

int turn = XX;

public TestDialog(Frame frame, int w, int h) {

super(frame, "", false);

setLayout(new GridLayout(w, h));

// 添加自定义按钮

for (int i = 0; i < w * h; i++) {

add(new TestButton(this));

resize(w * 50, h * 50);

}

}

@Override

public boolean handleEvent(Event evt) {

if (evt.id == Event.WINDOW_DESTROY) {

dispose();

} else {

return super.handleEvent(evt);

}

return true;

}

}

/**

* 自定义按钮

*/

class TestButton extends Canvas {

private static final long serialVersionUID = 1L;

int state = TestDialog.BLANK;

TestDialog parentDialog;

/**

* 构造器

*/

TestButton(TestDialog parent) {

this.parentDialog = parent;

}

@Override

public void paint(Graphics g) {

int x1 = 0;

int y1 = 0;

int x2 = size().width - 1;

int y2 = size().height - 1;

// 画矩形

g.drawRect(x1, y1, x2, y2);

x1 = x2 / 4;

y1 = y2 / 4;

int wide = x2 / 2;

int high = y2 / 2;

// 画差

if (state == TestDialog.XX) {

g.drawLine(x1, y1, x1 + wide, y1 + high);

g.drawLine(x1, y1 + high, x1 + wide, y1);

}

// 画圈

if (state == TestDialog.OO) {

g.drawOval(x1, y1, x1 + wide / 2, y1 + high / 2);

}

}

// 按下画圈或是画差

@Override

public boolean mouseDown(Event evt, int x, int y) {

if (state == TestDialog.BLANK) {

//

state = parentDialog.turn;

parentDialog.turn = (parentDialog.turn == TestDialog.XX ? TestDialog.OO : TestDialog.XX);

} else {

state = (state == TestDialog.XX ? TestDialog.OO : TestDialog.XX);

}

// 重绘

repaint();

return true;

}

}