using System;
using System.Drawing;
using System.Windows.Forms;
using Microsoft.VisualBasic.PowerPacks;

namespace Dongke.WinForm.Controls.InvoiceLayout
{
    /// <summary>
    /// 图形item
    /// </summary>
    [Serializable]
    public abstract class GraphicsItem : LayoutItem
    {
        #region 成员变量
        /// <summary>
        /// 背景填充色
        /// </summary>
        protected Color _fillColor = Color.Black;
        /// <summary>
        /// 背景透明
        /// </summary>
        protected bool _isTransparent = true;
        /// <summary>
        /// 边框色
        /// </summary>
        protected Color _lineColor = Color.Black;
        /// <summary>
        /// 边框宽 (mm単位)
        /// </summary>
        protected float _lineWidth = 0.1f;
        /// <summary>
        /// 边框宽 - 绘制用 (mm単位)
        /// </summary>
        protected float _lineWidthDraw = 0.1f;
        #endregion 成员变量

        #region 属性
        /// <summary>
        /// 获取或设置Item的边框颜色。
        /// </summary>
        public Color LineColor
        {
            get
            {
                return _lineColor;
            }
            set
            {
                if (!value.Equals(_lineColor))
                {
                    _lineColor = value;
                    SetShapeProperty(GetZoom());
                    if (Owner != null)
                    {
                        Owner.SetItemChangedArgs(this, ItemChangeType.Modified);
                    }
                }
            }
        }

        /// <summary>
        /// 获取或设置Item的边框宽度。
        /// </summary>
        /// <remarks>
        /// 设置小于0时，不显示边框。
        /// </remarks>
        public float LineWidth
        {
            get
            {
                return _lineWidth;
            }
            set
            {
                if (value < 0)
                {
                    return;
                }
                if (value != _lineWidth)
                {
                    _lineWidth = value;
                    float zoom = GetZoom();
                    _lineWidthDraw = _lineWidth * zoom;
                    SetShapeProperty(zoom);
                    if (Owner != null)
                    {
                        Owner.SetItemChangedArgs(this, ItemChangeType.Modified);
                    }
                }
            }
        }

        /// <summary>
        /// 获取或设置Item的背景填充色。
        /// </summary>
        public Color FillColor
        {
            get
            {
                return _fillColor;
            }
            set
            {
                if (!value.Equals(_fillColor))
                {
                    _fillColor = value;
                    SetShapeProperty(GetZoom());
                    if (Owner != null)
                    {
                        Owner.SetItemChangedArgs(this, ItemChangeType.Modified);
                    }
                }
            }
        }

        /// <summary>
        /// 获取或设置Item的背景是否透明。
        /// </summary>
        public bool Transparent
        {
            get
            {
                return _isTransparent;
            }
            set
            {
                if (value != _isTransparent)
                {
                    _isTransparent = value;
                    SetShapeProperty(GetZoom());
                    if (Owner != null)
                    {
                        Owner.SetItemChangedArgs(this, ItemChangeType.Modified);
                    }
                }
            }
        }
        #endregion 属性

        #region 构造函数
        /// <summary>
        /// 构造函数
        /// </summary>
        /// <param name="box">Layoutbox</param>
        /// <param name="itemType">item类别</param>
        internal GraphicsItem(LayoutBox box, ItemType itemType)
            : base(box, itemType)
        {
            _width = LayoutConsts.SHAPE_ITEM_SIZE_DEFAULT_WIDTH;
            _height = LayoutConsts.SHAPE_ITEM_SIZE_DEFAULT_HEIGHT;
        }
        #endregion 构造函数

        #region 函数
        /// <summary>
        /// 显示Item属性设置画面
        /// </summary>
        /// <returns>
        /// DialogResult.OK:选中的Item有效，设置成功<br/>
        /// DialogResult.Cancel:选中的Item有效，取消设置<br/>
        /// DialogResult.None:LayoutBox不是编辑模式，或选中的Item不是一个
        /// </returns>
        protected override DialogResult ShowItemPropertyDialogInner()
        {
            using (GraphicsItemSetting itemPropertySetting = new GraphicsItemSetting())
            {
                itemPropertySetting.ShapeLocationX = Left;
                itemPropertySetting.ShapeLocationY = Top;
                itemPropertySetting.ShapeWidth = Width;
                itemPropertySetting.ShapeHeight = Height;
                itemPropertySetting.LineColor = LineColor;
                itemPropertySetting.FillColor = FillColor;
                itemPropertySetting.LineWidth = LineWidth;
                itemPropertySetting.Transparent = Transparent;
                DialogResult result = itemPropertySetting.ShowDialog();
                if (result == DialogResult.OK)
                {
                    Left = itemPropertySetting.ShapeLocationX;
                    Top = itemPropertySetting.ShapeLocationY;
                    Width = itemPropertySetting.ShapeWidth;
                    Height = itemPropertySetting.ShapeHeight;
                    LineColor = itemPropertySetting.LineColor;
                    FillColor = itemPropertySetting.FillColor;
                    LineWidth = itemPropertySetting.LineWidth;
                    Transparent = itemPropertySetting.Transparent;
                    ResetItemFrame();
                    SetDrawProperty();
                    Owner.Dirty = true;
                }
                return result;
            }
        }

        /// <summary>
        /// 初始化Item图形属性
        /// </summary>
        internal override void SetShapeProperty(float zoom)
        {
            if (_shape != null)
            {
                if (_lineWidthDraw > 0)
                {
                    _shape.BorderStyle = System.Drawing.Drawing2D.DashStyle.Solid;
                    _shape.BorderColor = _lineColor;
                    _shape.BorderWidth = LayoutCommon.MillimeterToPixel(_lineWidthDraw);
                }
                else
                {
                    _shape.BorderStyle = System.Drawing.Drawing2D.DashStyle.Custom;
                    _shape.BorderWidth = 1;
                }
                if (_simpleShape != null)
                {
                    _simpleShape.FillStyle = (_isTransparent) ? FillStyle.Transparent : FillStyle.Solid;
                    _simpleShape.FillColor = _fillColor;
                }
            }
        }

        /// <summary>
        /// 初始化Item绘制用属性
        /// </summary>
        internal override float SetDrawProperty()
        {
            float zoom = base.SetDrawProperty();
            _lineWidthDraw = _lineWidth * zoom;
            SetShapeProperty(zoom);
            return zoom;
        }
        #endregion 函数
    }
}