using System;
using System.Drawing.Printing;
using System.Globalization;
using System.Windows.Forms;

namespace GoldPrinter
{
	public class WinPrinterPageSetting : IPrinterPageSetting
	{
		private PrintPageDelegate _printPageValue;

		private ImportExcelDelegate _importExcelValue;

		private PrintDocument _printDocument;

		public event PrintPageDelegate PrintPage
		{
			add
			{
				this._printDocument.PrintPage += new PrintPageEventHandler(value.Invoke);
				this._printPageValue = value;
			}
			remove
			{
				this._printDocument.PrintPage -= new PrintPageEventHandler(value.Invoke);
				this._printPageValue = null;
			}
		}

		public PrintDocument PrintDocument
		{
			get
			{
				return this._printDocument;
			}
			set
			{
				this._printDocument = value;
			}
		}

		public PrintPageDelegate PrintPageValue
		{
			get
			{
				return this._printPageValue;
			}
			set
			{
				this._printPageValue = value;
				this._printDocument.PrintPage += new PrintPageEventHandler(this._printPageValue.Invoke);
			}
		}

		public ImportExcelDelegate ImportExcelValue
		{
			get
			{
				return this._importExcelValue;
			}
			set
			{
				this._importExcelValue = value;
			}
		}

		public WinPrinterPageSetting() : this(null)
		{
		}

		public WinPrinterPageSetting(PrintDocument printDocument)
		{
			if (printDocument != null)
			{
				this._printDocument = printDocument;
			}
			else
			{
				this._printDocument = new PrintDocument();
			}
		}

		public PageSettings ShowPageSetupDialog()
		{
			return this.ShowPageSetupDialog(this._printDocument);
		}

		public PrinterSettings ShowPrintSetupDialog()
		{
			return this.ShowPrintSetupDialog(this._printDocument);
		}

		public void ShowPrintPreviewDialog()
		{
			this.ShowPrintPreviewDialog(this._printDocument);
		}

		protected virtual PageSettings ShowPageSetupDialog(PrintDocument printDocument)
		{
			this.ThrowPrintDocumentNullException(printDocument);
			PageSettings result = new PageSettings();
			PageSetupDialog pageSetupDialog = new PageSetupDialog();
			result = printDocument.DefaultPageSettings;
			try
			{
				pageSetupDialog.Document = printDocument;
				Margins margins = printDocument.DefaultPageSettings.Margins;
				if (RegionInfo.CurrentRegion.IsMetric)
				{
					margins = PrinterUnitConvert.Convert(margins, PrinterUnit.Display, PrinterUnit.TenthsOfAMillimeter);
				}
				PageSettings pageSettings = (PageSettings)printDocument.DefaultPageSettings.Clone();
				pageSetupDialog.PageSettings = pageSettings;
				pageSetupDialog.PageSettings.Margins = margins;
				DialogResult dialogResult = pageSetupDialog.ShowDialog();
				if (dialogResult == DialogResult.OK)
				{
					result = pageSetupDialog.PageSettings;
					printDocument.DefaultPageSettings = pageSetupDialog.PageSettings;
				}
			}
			catch (InvalidPrinterException e)
			{
				this.ShowInvalidPrinterException(e);
			}
			catch (Exception ex)
			{
				this.ShowPrinterException(ex);
			}
			finally
			{
				pageSetupDialog.Dispose();
				pageSetupDialog = null;
			}
			return result;
		}

		protected virtual PrinterSettings ShowPrintSetupDialog(PrintDocument printDocument)
		{
			this.ThrowPrintDocumentNullException(printDocument);
			PrinterSettings result = new PrinterSettings();
			PrintDialog printDialog = new PrintDialog();
			try
			{
				printDialog.AllowSomePages = true;
				printDialog.Document = printDocument;
				DialogResult dialogResult = printDialog.ShowDialog();
				if (dialogResult == DialogResult.OK)
				{
					result = printDialog.PrinterSettings;
					printDocument.Print();
				}
			}
			catch (InvalidPrinterException e)
			{
				this.ShowInvalidPrinterException(e);
			}
			catch (Exception ex)
			{
				this.ShowPrinterException(ex);
			}
			finally
			{
				printDialog.Dispose();
				printDialog = null;
			}
			return result;
		}

		private void Excel_ButtonClick(object sender, ToolBarButtonClickEventArgs e)
		{
			ToolBarButton button = e.Button;
			string toolTipText = button.ToolTipText;
			if (toolTipText == "Import Excel" && this._importExcelValue != null)
			{
				this._importExcelValue.BeginInvoke(sender, null, null, null);
			}
		}

		protected virtual void ShowPrintPreviewDialog(PrintDocument printDocument)
		{
			this.ThrowPrintDocumentNullException(printDocument);
			PrintPreviewDialog printPreviewDialog = new PrintPreviewDialog();
			printPreviewDialog.Text = printDocument.DocumentName;
			printPreviewDialog.WindowState = FormWindowState.Maximized;
			if (this._importExcelValue != null)
			{
				if (printPreviewDialog.Controls[1] is ToolBar)
				{
					ToolBar toolBar = (ToolBar)printPreviewDialog.Controls[1];
					ToolBarButton toolBarButton = new ToolBarButton();
					toolBarButton.ToolTipText = "Import Excel";
					toolBarButton.ImageIndex = 2;
					toolBar.ButtonClick += new ToolBarButtonClickEventHandler(this.Excel_ButtonClick);
					toolBar.Buttons.Add(toolBarButton);
				}
			}
			try
			{
				printPreviewDialog.Document = printDocument;
				DialogResult dialogResult = printPreviewDialog.ShowDialog();
				if (dialogResult == DialogResult.OK)
				{
				}
			}
			catch (InvalidPrinterException e)
			{
				this.ShowInvalidPrinterException(e);
			}
			catch (Exception ex)
			{
				this.ShowPrinterException(ex);
			}
			finally
			{
				printPreviewDialog.Dispose();
				printPreviewDialog = null;
			}
		}

		protected virtual void ThrowPrintDocumentNullException(PrintDocument printDocument)
		{
			if (printDocument == null)
			{
				throw new Exception("关联的打印文档不能为空！");
			}
		}

		protected virtual void ShowInvalidPrinterException(InvalidPrinterException e)
		{
			MessageBox.Show("未安装打印机，请进入系统控制面版添加打印机！", "打印", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
		}

		protected virtual void ShowPrinterException(Exception ex)
		{
			MessageBox.Show(ex.Message, "打印", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
		}
	}
}