using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace HotelPms.SourceFactory
{
    public partial class FormValid : Form
    {
        /// <summary>
        /// Validatingチェック＆メッセージ表示攻略
        /// ①CausesValidationItemを作成
        /// ②終了ボタンのCausesValidation = falseでValidatingを一旦止める(※注意：フォーカスを離れると、Validatingは再度走る)
        /// ③WndProcで×ボタンを押した時に、Validatingを一旦止める仕掛け this.ActiveControl = 終了ボタン;
        /// ④FormValid_KeyDownを押した時に、Validatingを一旦止める仕掛け this.ActiveControl = 終了ボタン;
        /// ⑤全部Validatingの先頭に下記の追加（CausesValidation = falseで一旦止めたValidatingは再度走る防止するため）
        /// if (!CausesValidationItem(sender)) { return; }        
        /// </summary>
        public FormValid()
        {
            InitializeComponent();
            button1.CausesValidation = true;
           // button2.TabIndex = 0;   
            button2.CausesValidation = false;  //終了
        }

        private bool CausesValidationItem(object sender)
        {
            return this.ActiveControl.CausesValidation;
        }

        private void textBox1_Validating(object sender, CancelEventArgs e)
        {
            if (!CausesValidationItem(sender)) { return; }
            MessageBox.Show("textBox1_Validating");
        }

        private void textBox2_Validating(object sender, CancelEventArgs e)
        {
            if (!CausesValidationItem(sender)) { return; }
            //if (!this.CausesValidation) { return; }
            MessageBox.Show("textBox2_Validating");
        }

        private void textBox3_Validating(object sender, CancelEventArgs e)
        {
            if (!CausesValidationItem(sender)) { return; }
            MessageBox.Show("textBox3_Validating");
        }

        private void textBox4_Validating(object sender, CancelEventArgs e)
        {
            if (!CausesValidationItem(sender)) { return; }
            MessageBox.Show("textBox4_Validating");
        }

        private void textBox5_Validating(object sender, CancelEventArgs e)
        {
            System.Diagnostics.Debug.WriteLine("Raise textBox5_Validating ");
            if (!CausesValidationItem(sender)) { return; }
            MessageBox.Show("textBox5_Validating");
        }

        private void button2_Click(object sender, EventArgs e)
        {
            //Focus時、前のコントロールのValidatingを一旦止める

            this.Close();   //この時点、ボタンをフォーカスを離れるので、前のコントロールのValidatingを再度走る
        }

        private void button1_Click(object sender, EventArgs e)
        {
            MessageBox.Show("button1_Click");
        }

        private void FormValid_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.F1)
            {
                this.ActiveControl = button1;
                button1.PerformClick();
            }
            else if (e.KeyCode == Keys.F12)
            {
                this.ActiveControl = button2;
                button2.PerformClick();
            }
        }

        protected override void WndProc(ref Message m)
        {
            //Console.WriteLine(m.Msg);
            const int WM_SYSCOMMAND = 0x0112;
            const int SC_CLOSE = 0xF060;
            if (m.Msg == WM_SYSCOMMAND && (int)m.WParam == SC_CLOSE)
            {
                //windowsの×ボタンを押すとき
                this.ActiveControl = button2;
            }
            base.WndProc(ref m);
        }

        private void FormValid_FormClosing(object sender, FormClosingEventArgs e)
        {
            //コントロールのValidatingの後
            this.ActiveControl = button2;
        }

        private void textBox5_PreviewKeyDown(object sender, PreviewKeyDownEventArgs e)
        {
            switch(e.KeyCode)
            {
                case Keys.Tab:
                    //enterや、tabでボタンへフォーカスする時、まだ終了していないので、チェックすることは望ましい
                    textBox5_Validating(sender, new CancelEventArgs());
                    e.IsInputKey = false;
                    break;
            }
        }

        private void textBox5_Enter(object sender, EventArgs e)
        {
            textBox5.BackColor = Color.Cyan;
        }

        private void textBox5_Leave(object sender, EventArgs e)
        {
            textBox5.BackColor = Color.White;
        }

        private void textBox4_Enter(object sender, EventArgs e)
        {
            textBox4.BackColor = Color.Cyan;
        }

        private void textBox4_Leave(object sender, EventArgs e)
        {
            textBox4.BackColor = Color.White;
        }

        private void textBox1_Enter(object sender, EventArgs e)
        {
            textBox1.BackColor = Color.Cyan;
        }

        private void textBox1_Leave(object sender, EventArgs e)
        {
            textBox1.BackColor = Color.White;
        }
    }
}