using System;
using System.ComponentModel;
using System.Drawing.Printing;
using System.Reflection;
using System.Windows.Forms;
using DevComponents.DotNetBar;
using FastReport.Preview;
using FastReport.Utils;
using ReportManager.Properties;

namespace ReportManager
{
 public class PreviewControlEx : PreviewControl
 {
 private ButtonItem btnDesign;
 private ComboBoxItem cmb;
 private LabelItem lab;

 public event Action<object> BeforePrint;
 public event Action<object> AfterPrint;

 public bool PrintButtonVisible
 {
 get
 {
 return this.ToolBar.Items["btnPrint"].Visible;
 }
 set
 {
 this.ToolBar.Items["btnPrint"].Visible = value;
 }
 }

 [System.Runtime.InteropServices.DllImport("user32.dll", EntryPoint = "GetKeyState")]
 public static extern int GetKeyState(int nVirtKey);

 public PreviewControlEx()
 {
 this.ToolBar.Items["btnPrint"].Click += new System.EventHandler((obj, args) =>
 {
 if (AfterPrint != null)
 this.AfterPrint(obj);
 });
 this.ToolBar.Items["btnPrint"].MouseUp += new System.Windows.Forms.MouseEventHandler((obj, args) =>
 {
 if (BeforePrint != null)
 this.BeforePrint(obj);
 });
 lab = new LabelItem("labStyle", "外观样式");
 lab.ItemAlignment = eItemAlignment.Far;
 cmb = new DevComponents.DotNetBar.ComboBoxItem("cmbStyle");
 cmb.Items.AddRange(System.Enum.GetNames(typeof(UIStyle)));
 cmb.ComboWidth = 125;
 cmb.SelectedIndexChanged += new System.EventHandler(cmb_SelectedIndexChanged);
 cmb.SelectedIndex = 0;
 if (PrintManager.CanDesign)
 {
 lab.BeginGroup = true;
 btnDesign = new ButtonItem("btnDesign", "设计报表");
 btnDesign.ItemAlignment = eItemAlignment.Far;
 btnDesign.ButtonStyle = eButtonStyle.ImageAndText;
 btnDesign.Image = Resources.Design;
 btnDesign.Click += new System.EventHandler(btnDesign_Click);
 this.ToolBar.Items.Add(btnDesign);
 }
 this.ToolBar.Items.Add(lab);
 this.ToolBar.Items.Add(cmb);
 this.PageChanged += PreviewControlEx_PageChanged;
 }

 ContextMenuBar barMain;
 ButtonItem itemRoot, item3, item4;
 ComboBoxItem item1, item2;
 TextBoxItem item5;

 protected override void OnLoad(EventArgs e)
 {
 base.OnLoad(e);
 Control tabControl = this.GetType().BaseType.GetField("tabControl",
 BindingFlags.Instance | BindingFlags.GetField | BindingFlags.NonPublic | BindingFlags.ExactBinding)
 .GetValue(this) as Control;
 barMain = new ContextMenuBar();
 itemRoot = new ButtonItem("Root");
 item1 = new ComboBoxItem("item1");
 item1.Text = "显示比例";
 ButtonItem btn1 = new ButtonItem("b1", "标准");
 ButtonItem btn2 = new ButtonItem("b2", "适应");
 ButtonItem btn3 = new ButtonItem("b3", "页面宽度");
 item1.Items.AddRange(new BaseItem[] { btn1, btn2, btn3 });
 item1.ComboWidth = 80;
 item1.DropDownStyle = ComboBoxStyle.DropDownList;
 item1.SelectedIndex = 0;
 item1.Click += (obj, args) =>
 {
 switch (item1.SelectedIndex)
 {
 case 0: this.Zoom = 1f; break;
 case 1: this.ZoomWholePage(); break;
 case 2: this.ZoomPageWidth(); break;
 default: break;
 }
 };
 item2 = new ComboBoxItem("item2");
 item2.Text = "页面位置";
 ButtonItem btn4 = new ButtonItem("b4", "前一页");
 ButtonItem btn5 = new ButtonItem("b5", "后一页");
 ButtonItem btn6 = new ButtonItem("b7", "首页");
 ButtonItem btn7 = new ButtonItem("b8", "尾页");
 item2.Items.AddRange(new BaseItem[] { btn4, btn5, btn6, btn7 });
 item2.ComboWidth = 80;
 item2.DropDownStyle = ComboBoxStyle.DropDownList;
 item2.SelectedIndex = 0;
 item2.Click += (obj, args) =>
 {
 switch (item2.SelectedIndex)
 {
 case 0: this.Prior(); break;
 case 1: this.Next(); break;
 case 2: this.First(); break;
 case 3: this.Last(); break;
 default: break;
 }
 };
 item3 = new ButtonItem("item3");
 item3.BeginGroup = true;
 item3.Text = "打印";
 item3.Image = Res.GetImage(195);
 item3.Click += (obj, args) =>
 {
 this.Print();
 };
 item4 = new ButtonItem("item4");
 item4.Text = "打印当前页";
 item4.Click += (obj, args) =>
 {
 this.Report.PrintSettings.PageNumbers = this.PageNo.ToString();
 this.Report.PrintSettings.PageRange = FastReport.PageRange.PageNumbers;
 this.Report.Print();
 this.Report.PrintSettings.PageNumbers = "";
 this.Report.PrintSettings.PageRange = FastReport.PageRange.All;
 };
 item5 = new TextBoxItem("item5");
 item5.Text = "页码范围";
 item5.Click += (obj, args) =>
 {
 try
 {
 this.Report.PrintSettings.PageNumbers = item5.ControlText;
 this.Report.PrintSettings.PageRange = FastReport.PageRange.PageNumbers;
 this.Report.Print();
 this.Report.PrintSettings.PageNumbers = "";
 this.Report.PrintSettings.PageRange = FastReport.PageRange.All;
 }
 catch
 {
 MessageBoxEx.Show("输入的页码范围无效,请核对后重试", "提示");
 }
 };
 itemRoot.SubItems.AddRange(new BaseItem[] { item1, item2, item3, item4, item5 });
 barMain.SetContextMenuEx(tabControl, itemRoot);
 this.Controls.Add(barMain);
 tabControl.Controls[0].MouseDown += (obj, args) =>
 {
 itemRoot.ClosePopup();
 };
 //tabControl.Controls[0].LostFocus += (obj, args) =>
 //{ 
 // itemRoot.ClosePopup();
 //};
 }

 void PreviewControlEx_PageChanged(object sender, EventArgs e)
 {
 this.PageChanged -= PreviewControlEx_PageChanged;
 //此后Report已经进行绑定
 #region 释放资源
 foreach (var datasource in this.Report.Dictionary.DataSources)
 {
 EventHandlerList list = typeof(Component).GetProperty("Events",
 BindingFlags.Instance | BindingFlags.GetProperty | BindingFlags.NonPublic | BindingFlags.ExactBinding)
 .GetValue(datasource, null) as EventHandlerList;
 object head = typeof(EventHandlerList).GetField("head",
 BindingFlags.Instance | BindingFlags.GetField | BindingFlags.NonPublic | BindingFlags.ExactBinding)
 .GetValue(list);
 if (head == null)
 continue;
 Type tp = typeof(EventHandlerList).Assembly.GetType("System.ComponentModel.EventHandlerList+ListEntry");
 object key = tp.GetField("key",
 BindingFlags.Instance | BindingFlags.GetField | BindingFlags.NonPublic | BindingFlags.ExactBinding)
 .GetValue(head);
 Delegate del = tp.GetField("handler",
 BindingFlags.Instance | BindingFlags.GetField | BindingFlags.NonPublic | BindingFlags.ExactBinding)
 .GetValue(head) as Delegate;
 list.RemoveHandler(key, del);
 }
 #endregion
 if ((GetKeyState((int)System.Windows.Forms.Keys.D) & 0x8000) != 0)
 {
 btnDesign_Click(this.btnDesign, EventArgs.Empty);
 }
 }

 private void btnDesign_Click(object sender, System.EventArgs e)
 {
 using (DesignerEx de = new DesignerEx(this.Report))
 {
 de.ShowDialog();
 }
 }

 private void cmb_SelectedIndexChanged(object sender, System.EventArgs e)
 {
 this.UIStyle = (UIStyle)System.Enum.Parse(typeof(UIStyle), cmb.SelectedItem.ToString());
 this.lab.Style = (eDotNetBarStyle)this.UIStyle;
 this.cmb.Style = (eDotNetBarStyle)this.UIStyle;
 }
 }

}