玩具：井字游戏范例

文件：

• declarative/toys/tic-tac-toe/tictactoe.svg
• declarative/toys/tic-tac-toe/qml/tic-tac-toe/tic-tac-toe.qml
• declarative/toys/tic-tac-toe/qml/tic-tac-toe/content/Button.qml
• declarative/toys/tic-tac-toe/qml/tic-tac-toe/content/TicTac.qml
• declarative/toys/tic-tac-toe/qml/tic-tac-toe/content/tic-tac-toe.js
• declarative/toys/tic-tac-toe/main.cpp
• declarative/toys/tic-tac-toe/tic-tac-toe.qmlproject
• declarative/toys/tic-tac-toe/tictactoe.pro