using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Drawing.Printing;
using Custom.Windows.Forms;

namespace CSharpNotepad
{
    public partial class mainForm : Form
    {
        #region 全局變量

        public childForm currentForm;           //標記當前活動的子窗口
        public int count = 0;                   //記錄打開過的文檔數量
        public string newfileType = ".rtf";     //新建立的文檔類型，獲取newfileForm的返回值

        public string currentFontFamilyName = null;    //記錄當前文本字體
        public float currentFontSize = 0.0f;           //記錄當前文本字號

        public TabPage page;

        #endregion


        #region 構造函數

        public mainForm()
        {
            InitializeComponent();
        }

        #endregion

        
        #region 其他方法
        
        public void SetCurrentFont()
        {
            this.tscbFontFamilyName.Text = this.currentForm.currentFont.Name;
            this.tscbFontSize.Text = this.currentForm.currentFont.Size.ToString();

            this.tsbBold.Checked = this.currentForm.currentFont.Bold;
            this.tsbItalic.Checked = this.currentForm.currentFont.Italic;
            this.tsbUnderLine.Checked = this.currentForm.currentFont.Underline;
        }

        public void SetCurrentAlignment()
        {
            this.LeftAlign.Checked = false;
            this.MiddleAlign.Checked = false;
            this.RightAlign.Checked = false;
            switch (this.currentForm.currentAlignment)
            {
                case HorizontalAlignment.Left:
                    this.LeftAlign.Checked = true;
                    break;
                case HorizontalAlignment.Center:
                    this.MiddleAlign.Checked = true;
                    break;
                case HorizontalAlignment.Right:
                    this.RightAlign.Checked = true;
                    break;
            }
        }
            
        public void CheckActiveMdiChild()
        {
            if (this.tabControl1.TabCount == 0 || this.MdiChildren.Length == 0)
            {
                #region 菜單欄
                保存ToolStripMenuItem.Enabled = false;
                另存為ToolStripMenuItem.Enabled = false;
                打印設置ToolStripMenuItem.Enabled = false;
                打印預覽ToolStripMenuItem.Enabled = false;
                打印ToolStripMenuItem.Enabled = false;

                撤消ToolStripMenuItem.Enabled = false;
                恢復ToolStripMenuItem.Enabled = false;
                剪切ToolStripMenuItem.Enabled = false;
                復制ToolStripMenuItem.Enabled = false;
                粘貼ToolStripMenuItem.Enabled = false;
                刪除ToolStripMenuItem.Enabled = false;
                查找ToolStripMenuItem.Enabled = false;
                替換ToolStripMenuItem.Enabled = false;
                全選ToolStripMenuItem.Enabled = false;
                時間和日期ToolStripMenuItem.Enabled = false;

                自動換行AToolStripMenuItem.Enabled = false;
                字體ToolStripMenuItem.Enabled = false;
                顏色ToolStripMenuItem.Enabled = false;
                項目符號樣式ToolStripMenuItem.Enabled = false;
                段落ToolStripMenuItem.Enabled = false;
                左對齊ToolStripMenuItem.Enabled = false;
                居中ToolStripMenuItem.Enabled = false;
                右對齊ToolStripMenuItem.Enabled = false;
                顯示比例ToolStripMenuItem.Enabled = false;

                層疊顯示ToolStripMenuItem.Enabled = false;
                水平排列ToolStripMenuItem.Enabled = false;
                垂直排列ToolStripMenuItem.Enabled = false;
                #endregion

                #region 工具欄
                保存SToolStripButton.Enabled = false;
                打印PToolStripButton.Enabled = false;
                打印預覽VToolStripButton.Enabled = false;
                剪切UToolStripButton.Enabled = false;
                復制CToolStripButton.Enabled = false;
                粘貼PToolStripButton.Enabled = false;
                撤消UToolStripButton.Enabled = false;
                恢復RToolStripButton.Enabled = false;
                tscbDisplayRatio.Enabled = false;
                #endregion

                #region 格式欄
                tscbFontFamilyName.Enabled = false;
                tscbFontSize.Enabled = false;
                tsbBold.Enabled = false;
                tsbItalic.Enabled = false;
                tsbUnderLine.Enabled = false;
                LeftAlign.Enabled = false;
                MiddleAlign.Enabled = false;
                RightAlign.Enabled = false;
                tssbFontColor.Enabled = false;
                tsbProject.Enabled = false;
                #endregion

                return;
            }
            else
            {
                #region 菜單欄
                保存ToolStripMenuItem.Enabled = true;
                另存為ToolStripMenuItem.Enabled = true;
                打印設置ToolStripMenuItem.Enabled = true;
                打印預覽ToolStripMenuItem.Enabled = true;
                打印ToolStripMenuItem.Enabled = true;

                撤消ToolStripMenuItem.Enabled = true;
                恢復ToolStripMenuItem.Enabled = true;
                剪切ToolStripMenuItem.Enabled = true;
                復制ToolStripMenuItem.Enabled = true;
                粘貼ToolStripMenuItem.Enabled = true;
                刪除ToolStripMenuItem.Enabled = true;
                查找ToolStripMenuItem.Enabled = true;
                替換ToolStripMenuItem.Enabled = true;
                全選ToolStripMenuItem.Enabled = true;
                時間和日期ToolStripMenuItem.Enabled = true;

                自動換行AToolStripMenuItem.Enabled = true;
                字體ToolStripMenuItem.Enabled = true;
                顏色ToolStripMenuItem.Enabled = true;
                項目符號樣式ToolStripMenuItem.Enabled = true;
                段落ToolStripMenuItem.Enabled = true;
                左對齊ToolStripMenuItem.Enabled = true;
                居中ToolStripMenuItem.Enabled = true;
                右對齊ToolStripMenuItem.Enabled = true;
                顯示比例ToolStripMenuItem.Enabled = true;

                層疊顯示ToolStripMenuItem.Enabled = true;
                水平排列ToolStripMenuItem.Enabled = true;
                垂直排列ToolStripMenuItem.Enabled = true;
                #endregion

                #region 工具欄
                保存SToolStripButton.Enabled = true;
                打印PToolStripButton.Enabled = true;
                打印預覽VToolStripButton.Enabled = true;
                剪切UToolStripButton.Enabled = true;
                復制CToolStripButton.Enabled = true;
                粘貼PToolStripButton.Enabled = true;
                撤消UToolStripButton.Enabled = true;
                恢復RToolStripButton.Enabled = true;
                tscbDisplayRatio.Enabled = true;
                #endregion

                #region 格式欄
                tscbFontFamilyName.Enabled = true;
                tscbFontSize.Enabled = true;
                tsbBold.Enabled = true;
                tsbItalic.Enabled = true;
                tsbUnderLine.Enabled = true;
                LeftAlign.Enabled = true;
                MiddleAlign.Enabled = true;
                RightAlign.Enabled = true;
                tssbFontColor.Enabled = true;
                tsbProject.Enabled = true;
                #endregion

                return;
            }

        }

        public int CurrentFormIndexOf()
        {   //查詢當前子窗口在MdiChildren中的索引
            int i;
            for (i = 0; i < this.MdiChildren.Length; ++i)
            {
                if (this.currentForm == (childForm)this.MdiChildren[i])
                    break;
            }
            return i;
        }

        private void MainForm_Load(object sender, EventArgs e)
        {
            this.mdiClientController1.AutoScroll = false; //禁用主窗口的滾動條，因為默認的為無效
            
            this.tabControl1.Height = 0;
            this.tbCurrentFormClose.Height = 0;

            this.CheckActiveMdiChild();  // 設置控件的可見性
            this.GetDisplayRatio();      // 獲取顯示比例數據
            this.GetFontFamilyNames();   // 獲取字體數據
            this.GetFontSize();          // 獲取字號數據
        }
        
        private void MainForm_FormClosing(object sender, FormClosingEventArgs e)
        {
            int count = this.MdiChildren.Length - 1;
            for (int i = count; i >= 0; i--)
            {
                this.MdiChildren[i].Close();
            }

            /*
            childForm arrChildren = (childForm[])this.MdiChildren;
        
            for (int i = 0; i < MdiChildren.Length; i++)
            {
                if (arrChildren[i].docHasChanged)
                {
                    string strask = "文件 " + arrChildren[i].fileName +" 的文字已經改變。\n想保存文件嗎？";
                    DialogResult asksave = MessageBox.Show(strask, "CSharpNotepad", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Warning);
                    if (asksave == DialogResult.Yes)
                    {
                        this.currentForm = arrChildren[i];
                        this.保存ToolStripMenuItem_Click(sender, e);
                        arrChildren[i].Close();
                    }
                    else if (asksave == DialogResult.No)
                    {
                        Application.Exit();
                    }
                    else if (asksave == DialogResult.Cancel)
                    {
                        return;
                    }
                }
                else if (!arrChildren[i].docHasChanged)
                {
                    arrChildren[i].Close();
                }
            }*/
        }

        private void MainForm_KeyUp(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Insert)
            {
                string str = this.toolStripStatusInsertOrOver.Text;
                this.toolStripStatusInsertOrOver.Text = (str.Equals("插入")) ? "覆蓋" : "插入";
            }
        }

        private void MainForm_MdiChildActivate(object sender, EventArgs e)
        {
            //獲取當前激活窗口
            this.currentForm = (childForm)this.ActiveMdiChild;
            if (this.currentForm != null)
            {
                //comboBox_scale.Text = string.Format("{0:G3}%", currentdoc.richTextBox1.ZoomFactor * 100);//當前窗口的閱讀比例
            }
            this.tabControl1.SelectedIndex = CurrentFormIndexOf();
        }

        #endregion


        #region TabControl控件

        private void tabControl1_SelectedIndexChanged(object sender, System.EventArgs e)
        {   //通過單擊tabPage激活子窗口
            if (this.tabControl1.SelectedIndex == -1)
                return;
            this.MdiChildren[this.tabControl1.SelectedIndex].Activate();
        }

        private void tabControl1_DoubleClick(object sender, System.EventArgs e)
        {   //雙擊關閉該文檔
            if (this.currentForm != null)
            {
                this.currentForm.Close();
            }
        }

        public void NewTabPage()
        {   //新建文檔時創建一個標簽頁
            this.tabControl1.Height = 19;
            this.tbCurrentFormClose.Height = 17;
            this.page = new TabPage(this.currentForm.Text);
            this.page.Parent = this.tabControl1;
        }

        public void NewTabPage(string FileName)
        {   //打開文檔時創建一個標簽頁
            this.tabControl1.Height = 19;
            this.tbCurrentFormClose.Height = 17;
            this.page = new TabPage(this.currentForm.Text);
            this.page.Parent = this.tabControl1;
            this.page.Text = FileName;
        }

        private void ReSetTabPageName(int CurrentFormIndexOf, string FileName)
        {   //“另存為”后修改標簽頁
            tabControl1.SelectedIndex = CurrentFormIndexOf;
            tabControl1.SelectedTab.Text = FileName;
        }

        private void tbCurrentFormClose_Click(object sender, EventArgs e)
        {   //單擊關閉按鈕關閉該文檔
            if (this.currentForm != null)
            {
                this.currentForm.Close();
            }
        }

        #endregion


        #region 窗體和文本框接受拖進來的數據的事件處理

        private void MainForm_DragEnter(object sender, DragEventArgs e)
        {
            if (e.Data.GetDataPresent(DataFormats.FileDrop))
                e.Effect = DragDropEffects.Link;
            else
                e.Effect = DragDropEffects.None;
        }

        public void MainForm_DragDrop(object sender, DragEventArgs e)
        {
            // 創建一個子窗口對象，用來實現打開一個文檔，并設置該子窗口為活動窗口
            childForm childForm = new childForm(this);

            childForm.filePath = ((System.Array)e.Data.GetData(DataFormats.FileDrop)).GetValue(0).ToString(); ;
            FileInfo finfo = new FileInfo(childForm.filePath);

            childForm.fileName = finfo.Name;
            childForm.fileType = finfo.Extension;
            childForm.isNewDoc = false;

            if (finfo.Extension == ".rtf")
            {
                childForm.richTextBox1.LoadFile(childForm.filePath, RichTextBoxStreamType.RichText);
                childForm.Icon = Properties.Resources.RtfIcon;
            }
            else if (finfo.Extension == ".txt")
            {
                childForm.richTextBox1.LoadFile(childForm.filePath, RichTextBoxStreamType.PlainText);
                childForm.Icon = Properties.Resources.TxtIcon;
            }
            else
            {
                MessageBox.Show("不能打開此格式的文件,請檢查后再試!", "Notepad", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                return;
            }

            childForm.Name = childForm.fileName;
            childForm.Text = childForm.fileName;
            childForm.MdiParent = this;
            childForm.Show();

            this.currentForm = childForm;       //設置當前子窗口為活動窗口
            this.NewTabPage(childForm.fileName);//新建標簽頁