mycalendar.cs

windows modile 编程．实现简单的crm功能

using System;
using System.Collections;
using System.Text;
using System.Windows.Forms;
using System.Drawing;

namespace Opportune.CalEx
{
	class MyCalendar
	{
		/// <summary>
		/// 以下几个成员变量分别是:
		/// 1,本类生成时传递进来的"当前时间"
		/// 2,我的月(42天)的对象
		/// 3,当前选中的日期在我的月的对象中的序号(0-41)
		/// 4,本类所对应的控件,应该是一个 Panel ,即 panel3
		/// 5,保存日期和图片的 hash 表
		/// </summary>
		private DateTime _now;
		private MonthEx _mymonth;
		private int _selected;
		private Control _control;
		private Hashtable _hash;

		public MyCalendar(Control owner, DateTime now)
		{
			_control = owner;
			_now = now;
			_mymonth = new MonthEx(now.Year, now.Month);
			_hash = new Hashtable(100, 0.2f);

			for (int i = 0; i < MonthEx.DATECOUNT; i++)
			{
				if (_mymonth.Dates[i].date == _now.Date)
				{
					_selected = i;
					break;
				}
			}
		}
		public int Year
		{
			get
			{
				return _mymonth.Year;
			}
			set
			{
				if (_mymonth.Year == value)
					return;
				MonthEx m = new MonthEx(value, _mymonth.Month);
				_mymonth = null;
				_mymonth = m;

				((IMyCalChanged)(_control.Parent)).DoCalChanged(_mymonth.Year, _mymonth.Month);
			}
		}

		public int Month
		{
			get
			{
				return _mymonth.Month;
			}
			set
			{
				if (_mymonth.Month == value)
					return;
				MonthEx m = new MonthEx(_mymonth.Year, Month);
				if (_selected >= 0)
				{
					for (int i = 0; i < MonthEx.DATECOUNT; i++)
					{
						if (_mymonth.Dates[_selected].date == m.Dates[i].date)
						{
							_selected = i;
							break;
						}
					}
				}
				_mymonth = null;
				_mymonth = m;

				((IMyCalChanged)(_control.Parent)).DoCalChanged(_mymonth.Year, _mymonth.Month);
			}
		}

		public void AdvanceMonth(bool bNextMonth)
		{
			DateTime dtSelected = DateTime.Now;
			if (_selected >= 0)
				dtSelected = _mymonth.Dates[_selected].date;

			MonthEx m;
			if (bNextMonth)
				m = _mymonth.NextMonth;
			else
				m = _mymonth.PrevMonth;
			_mymonth = null;
			_mymonth = m;

			if (_selected >= 0)
			{
				for (int i = 0; i < MonthEx.DATECOUNT; i++)
				{
					if (_mymonth.Dates[i].date == dtSelected)
					{
						_selected = i;
						break;
					}
				}
			}

			((IMyCalChanged)(_control.Parent)).DoCalChanged(_mymonth.Year, _mymonth.Month);
		}

		public void Paint(Graphics g)
		{
			int width = _control.Width / 7;
			int height = _control.Height / 6;
			Pen pen = new Pen(Color.Gray, 1);
			int i, j, x, y;
			x = 0;
			y = height * 6;
			for (i = 0; i < 8; i++)
			{
				if (i == 0)
					x = 0;
				else
					x += width;
				g.DrawLine(pen, x, 0, x, y);
			}
			x = width * 7;
			y = 0;
			for (i = 0; i < 7; i++)
			{
				if (i == 0)
					y = 0;
				else if(i == 6)
					y += height - 1;
				else
					y += height;
				g.DrawLine(pen, 0, y, x, y);
			}
			Font f = new Font("Arial", 12, FontStyle.Regular);
			SolidBrush brToday = new SolidBrush(Color.Red);
			SolidBrush brCurr = new SolidBrush(Color.Black);
			SolidBrush brOther = new SolidBrush(Color.LightGray);
			
			Image img;
			for (i = 0; i < 7; i++)
			{
				for (j = 0; j < 6; j++)
				{
					RectangleF rect = new RectangleF(i * width, j * height,
						(i + 1) * width, (j + 1) * height);
					x = j * 7 + i;
					y = _mymonth.Dates[x].date.Day;
					if (_mymonth.Dates[x].date == _now.Date)
						g.DrawString(y.ToString(), f, brToday, rect);
					else if (_mymonth.Dates[x].month == MonthEx.IN_WHICH_MONTH.IN_CURRENT_MONTH)
						g.DrawString(y.ToString(), f, brCurr, rect);
					else
						g.DrawString(y.ToString(), f, brOther, rect);

					img = GetImage(_mymonth.Dates[x].date);
					if (img != null)
						g.DrawImage(img, (int)(rect.Left + width / 2), (int)(rect.Top + height / 2));
				}
			}
			RedrawOneCell(g, _selected);
		}

		public void OnClick(int x, int y)
		{
			int width = _control.Width / 7;
			int height = _control.Height / 6;
			int sel = (y / height) * 7 + x / width;
			if (sel < 0 || sel >= MonthEx.DATECOUNT)
				return;
			DateTime clickedDateTime = _mymonth.Dates[sel].date;
			bool bClickedImage = false;
			if ((x % width) > width / 2 && (y % height) > height / 2)
				bClickedImage = true;
			
			if (_selected != sel)
			{
				int old = _selected;
				_selected = sel;
				if (old >= 0)
				{
					_control.Invalidate(GetRectByIndex(old));
					_control.Update();
				}
				_control.Invalidate(GetRectByIndex(_selected));
				_control.Update();

				if (_mymonth.Dates[sel].month == MonthEx.IN_WHICH_MONTH.IN_PREV_MONTH)
					AdvanceMonth(false);
				else if (_mymonth.Dates[sel].month == MonthEx.IN_WHICH_MONTH.IN_NEXT_MONTH)
					AdvanceMonth(true);
				else
					((IMyCalChanged)(_control.Parent)).DoSelChanged(clickedDateTime, _selected);
			}
			if (bClickedImage)
			{
				((IMyCalChanged)(_control.Parent)).DoImageClicked(clickedDateTime, GetImage(clickedDateTime));
				return;
			}
		}

		public void MakeTodayVisible()
		{
			if (_mymonth.Year == _now.Year && _mymonth.Month == _now.Month)
			{
				int index = this.GetIndexByDate(_now.Date);
				if(index == _selected)
					return;
				Rectangle rect = this.GetRectByIndex(index);
				this.OnClick(rect.Left + 2, rect.Top + 2);
				return;
			}
			MonthEx m = new MonthEx(_now.Year, _now.Month);
			_mymonth = null;
			_mymonth = m;
			for (int i = 0; i < MonthEx.DATECOUNT; i++)
			{
				if (_mymonth.Dates[i].date == _now.Date)
				{
					_selected = i;
					break;
				}
			}
			((IMyCalChanged)(_control.Parent)).DoCalChanged(_mymonth.Year, _mymonth.Month);
		}

		public void RedrawOneCell(Graphics g, int index)
		{
			if (index < 0 || index >= MonthEx.DATECOUNT)
				return;
			Rectangle rect = GetRectByIndex(index);
			bool selected;
			if (index == _selected)
				selected = true;
			else
				selected = false;

			SolidBrush back_brush;
			if (selected)
				back_brush = new SolidBrush(Color.Cyan);
			else
				back_brush = new SolidBrush(Color.Transparent);
			Rectangle back_rect = new Rectangle(rect.Left, rect.Top,
				rect.Width, rect.Height);
			g.FillRectangle(back_brush, back_rect);

			Font f = new Font("Arial", 12, FontStyle.Regular);
			SolidBrush br;
			if (_mymonth.Dates[index].date == _now.Date )
				br = new SolidBrush(Color.Red);
			else if (_mymonth.Dates[index].month == MonthEx.IN_WHICH_MONTH.IN_CURRENT_MONTH)
				br = new SolidBrush(Color.Black);
			else
				br = new SolidBrush(Color.LightGray);
			g.DrawString(_mymonth.Dates[index].date.Day.ToString(), f, br, back_rect);

			Image img = GetImage(_mymonth.Dates[index].date);
			if (img != null)
				g.DrawImage(img, (int)(rect.Left + rect.Width / 2), (int)(rect.Top + rect.Height / 2));
		}

		public int GetIndexByRect(Rectangle rect)
		{
			if (rect.Width == 0 || rect.Height == 0)
				return -1;
			if (rect.Width >= _control.Width || rect.Height >= _control.Height)
				return -2;
			if(rect.Width % _control.Width != 0)
				return -3;
			if (rect.Height % _control.Height != 0)
				return -4;
			int width = _control.Width / 7;
			int height = _control.Height / 6;
			int index = (rect.Top / height) * 7 + (rect.Left / width);
			if (index < 0 || index >= MonthEx.DATECOUNT)
				return -5;
			return index;
		}

		public Rectangle GetRectByIndex(int index)
		{
			if (index < 0 || index >= MonthEx.DATECOUNT)
				throw new Exception("Invalid index while calling MyCalendar.GetRectByIndex!");
			int width = _control.Width / 7;
			int height = _control.Height / 6;
			int x = (index % 7) * width;
			int y = (index / 7) * height;
			return new Rectangle(x + 1, y + 1, width - 1, height - 1);
		}
		public int GetIndexByDate(DateTime date)
		{
			for (int i = 0; i < MonthEx.DATECOUNT; i++)
			{
				if (date.Date == _mymonth.Dates[i].date)
					return i;
			}
			return -1;
		}

		public void SetImage(DateTime date, Image img,bool update)
		{
			if (img == null)
				_hash.Remove(date.Date);
			else
			{
				_hash.Remove(date.Date);
				_hash.Add(date.Date, img);
			}
			if (update == true)
			{
				int index = GetIndexByDate(date);
				if (index >= 0)
				{
					_control.Invalidate(GetRectByIndex(index));
					_control.Update();
				}
			}
		}

		public Image GetImage(DateTime date)
		{
			if (_hash.ContainsKey(date.Date))
				return (Image)_hash[date.Date];
			return null;
		}

		public void ClearImage()
		{
			_hash.Clear();
		}

		public DateTime[] GetAllDates()
		{
			MonthEx.MyDate[] all = _mymonth.Dates;
			DateTime[] dts = new DateTime[MonthEx.DATECOUNT];
			for (int i = 0; i < MonthEx.DATECOUNT; i++)
			{
				dts[i] = all[i].date;
			}
			return dts;
		}
		public DateTime GetSelectedDate()
		{
			if (this._selected < 0 || this._selected >= MonthEx.DATECOUNT)
				return new DateTime(_mymonth.Year, _mymonth.Month, 1);
			else
				return _mymonth.Dates[_selected].date;
		}
		public void OnKeyDown(System.Windows.Forms.Keys key)
		{
			if(key == System.Windows.Forms.Keys.Enter)
			{
				if(_selected >= 0)
					((IMyCalChanged)(_control.Parent)).DoImageClicked(_mymonth.Dates[_selected].date,GetImage(_mymonth.Dates[_selected].date));
				return;
			}

			int new_sel;
			if (key == System.Windows.Forms.Keys.Up)
			{
				new_sel = _selected - 7;
				if (new_sel < 0)
					new_sel = 0;
			}
			else if (key == System.Windows.Forms.Keys.Down)
			{
				new_sel = _selected + 7;
				if (new_sel > MonthEx .DATECOUNT - 1)
					new_sel = MonthEx .DATECOUNT - 1;
			}
			else if (key == System.Windows.Forms.Keys.Left)
			{
				new_sel = _selected - 1;
				if (new_sel < 0)
					new_sel = 0;
			}
			else if (key == System.Windows.Forms.Keys.Right)
			{
				new_sel = _selected + 1;
				if (new_sel > MonthEx .DATECOUNT - 1)
					new_sel = MonthEx .DATECOUNT - 1;
			}
			else
			{
				return;
			}
			if (new_sel == _selected)
				return;
			int old_sel = _selected;
			_selected = new_sel;
			if (old_sel >= 0)
			{
				_control.Invalidate(GetRectByIndex(old_sel));
				_control.Update();
			}
			_control.Invalidate(GetRectByIndex(_selected));

			if (_mymonth.Dates[_selected].month == MonthEx.IN_WHICH_MONTH.IN_PREV_MONTH)
				AdvanceMonth(false);
			else if (_mymonth.Dates[_selected].month == MonthEx.IN_WHICH_MONTH.IN_NEXT_MONTH)
				AdvanceMonth(true);
			else
				((IMyCalChanged)(_control.Parent)).DoSelChanged(_mymonth.Dates[_selected].date, _selected);
		}
	}
}