PHP设计模式之状态模式定义与用法详解(4)

<?php class Cell3State implements IMatrix { private $context; public function __construct(Context $contextNow) { $this->context = $contextNow; } public function goLeft() { echo '走到<strong>2</strong><br />'; $this->context->setState($this->context->getCell2State()); } public function goRight() { echo '不合法的移动!<br />'; } public function goUp() { echo '不合法的移动!<br />'; } public function goDown() { echo '走到<strong>6</strong><br />'; $this->context->setState($this->context->getCell6State()); } }

Cell4State

<?php class Cell4State implements IMatrix { private $context; public function __construct(Context $contextNow) { $this->context = $contextNow; } public function goLeft() { echo '不合法的移动!<br />'; } public function goRight() { echo '走到<strong>5</strong><br />'; $this->context->setState($this->context->getCell5State()); } public function goUp() { echo '走到<strong>1</strong><br />'; $this->context->setState($this->context->getCell1State()); } public function goDown() { echo '走到<strong>7</strong><br />'; $this->context->setState($this->context->getCell7State()); } }

Cell5State

<?php class Cell5State implements IMatrix { private $context; public function __construct(Context $contextNow) { $this->context = $contextNow; } public function goLeft() { echo '走到<strong>4</strong><br />'; $this->context->setState($this->context->getCell4State()); } public function goRight() { echo '走到<strong>6</strong><br />'; $this->context->setState($this->context->getCell6State()); } public function goUp() { echo '走到<strong>2</strong><br />'; $this->context->setState($this->context->getCell2State()); } public function goDown() { echo '走到<strong>8</strong><br />'; $this->context->setState($this->context->getCell8State()); } }

Cell6State

<?php class Cell6State implements IMatrix { private $context; public function __construct(Context $contextNow) { $this->context = $contextNow; } public function goLeft() { echo '走到<strong>5</strong><br />'; $this->context->setState($this->context->getCell5State()); } public function goRight() { echo '不合法的移动!<br />'; } public function goUp() { echo '走到<strong>3</strong><br />'; $this->context->setState($this->context->getCell3State()); } public function goDown() { echo '走到<strong>9</strong><br />'; $this->context->setState($this->context->getCell9State()); } }

Cell7State

<?php class Cell7State implements IMatrix { private $context; public function __construct(Context $contextNow) { $this->context = $contextNow; } public function goLeft() { echo '不合法的移动!<br />'; } public function goRight() { echo '走到<strong>8</strong><br />'; $this->context->setState($this->context->getCell8State()); } public function goUp() { echo '走到<strong>4</strong><br />'; $this->context->setState($this->context->getCell4State()); } public function goDown() { echo '不合法的移动!<br />'; } }

Cell8State

<?php class Cell8State implements IMatrix { private $context; public function __construct(Context $contextNow) { $this->context = $contextNow; } public function goLeft() { echo '走到<strong>7</strong><br />'; $this->context->setState($this->context->getCell7State()); } public function goRight() { echo '走到<strong>9</strong><br />'; $this->context->setState($this->context->getCell9State()); } public function goUp() { echo '走到<strong>5</strong><br />'; $this->context->setState($this->context->getCell5State()); } public function goDown() { echo '不合法的移动!<br />'; } }

Cell9State