ver 1.7 : You can drag and scale image now

Ver1.7

• Add mouse control:
  • Use scroll up to scale up
  • Use scroll down to scale down
  • Use mouse mid button to make image back to original pos and scale rate
  • Can drag image now by left click and moving mouse
• Add dict to save sets to make code more flexible.

Ver1.7

• 新增滑鼠操作
  • 滾輪上滑放大
  • 滾輪下滑縮小
  • 滾輪鍵(中鍵)按下復原位置和縮放尺寸
  • 可以按左鍵拖放圖片
• 新增字典保存設定，讓代碼更靈活