using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;

namespace WorkflowDesigner.Designer
{
    /// <summary>
    /// 可視化對象基類
    /// </summary>
    public class DesignerVisualObject
    {
        #region 字段
        /// <summary>
        /// 是否被選中
        /// </summary>
        private bool _isSelected = false;

        /// <summary>
        /// 所占表格的大小
        /// </summary>
        protected const int GridSize = 10;

        #endregion

        #region 屬性
        /// <summary>
        /// 是否被選中
        /// </summary>
        public bool IsSelected
        {
            get
            {
                return _isSelected;
            }
            set
            {
                _isSelected = value;
            }
        }
        #endregion

        #region　構造函數

        #endregion

        #region 操作

        #region 私有
        #endregion

        #region 保護
        /// <summary>
        /// 對齊到數字
        /// </summary>
        /// <param name="number">圖形所在的位置的坐標</param>
        /// <param name="alignNumber">所占表格的大小</param>
        /// <returns>返回最新的位置坐標</returns>
        protected int AlignToNumber(int number, int alignNumber)
        {
            //通過四舍五路的方法對齊到最近的表格
            int newNum = number - (number % alignNumber);
            if ((number - newNum) > (alignNumber / 2))
            {
                return newNum + alignNumber;
            }
            else
            {
                return newNum;
            }
        }
        #endregion

        #region 公用

        /// <summary>
        /// 判斷鼠標點擊出是否有可視化對象
        /// </summary>
        /// <param name="x">鼠標所在位置的x軸坐標</param>
        /// <param name="y">鼠標所在位置的y軸坐標</param>
        /// <returns>點擊出的可視化對象</returns>
        public virtual HitTestState HitTest(int x, int y)
        {
            return HitTestState.None;
        }

        /// <summary>
        /// 對齊到畫布上的表格
        /// </summary>
        public virtual void AlignToGrid()
        {
            
        }

        /// <summary>
        /// 框選
        /// </summary>
        /// <param name="rect">選中的矩形范圍</param>
        public virtual void RangeSelect(Rectangle rect)
        {
            
        }

        /// <summary>
        /// 繪制
        /// </summary>
        /// <param name="g">繪圖圖面</param>
        public virtual void Draw(Graphics g)
        {
        }


        /// <summary>
        /// 移動
        /// </summary>
        /// <param name="offX">移動新位置的x軸坐標</param>
        /// <param name="offY">移動新位置的y軸坐標</param>
        public virtual void Move(int offX, int offY)
        {
        }

        /// <summary>
        /// 打開屬性對話框
        /// </summary>
        public virtual void OpenPropertyDialog()
        {
        }

        /// <summary>
        /// 圖形矩陣
        /// </summary>
        /// <returns>返回一個圖形矩陣</returns>
        public virtual Rectangle GetRange()
        {
            return new Rectangle(0, 0, 0, 0);
        }
        #endregion
        #endregion



        
    }
}