pinusercontrol.cs

清华大学出版社出版的 移动应用开发宝典 张大威（2008）的附书源代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Windows.Forms;
using Microsoft.WindowsCE.Forms;

namespace Chapter15.Windows.Forms
{
    public partial class PinUserControl : UserControl
    {
        public PinUserControl()
        {
#if !Smartphone
            InitializeComponent();
#endif
        }

        public override string Text
        {
            get
            {
#if !Smartphone
                return txtPin.Text;
#else
                return string.Empty;
#endif
            }
        }

        public bool IsEntered
        {
            get
            {
#if !Smartphone
                return (txtPin.Text.Length == 4);
#else
                return false;
#endif
            }
        }

        private Color buttonColor = SystemColors.ActiveCaption;

        public Color ButtonColor
        {
            get
            {
                return buttonColor;
            }
            set
            {
                buttonColor = value;
#if !Smartphone
                btn0.BackColor = buttonColor;
                btn1.BackColor = buttonColor;
                btn2.BackColor = buttonColor;
                btn3.BackColor = buttonColor;
                btn4.BackColor = buttonColor;
                btn5.BackColor = buttonColor;
                btn6.BackColor = buttonColor;
                btn7.BackColor = buttonColor;
                btn8.BackColor = buttonColor;
                btn9.BackColor = buttonColor;
                btnBack.BackColor = buttonColor;
#endif
            }
        }

        public event EventHandler PinChanged;

        protected virtual void OnPinChanged(object sender, EventArgs e)
        {
            if (this.PinChanged != null)
            {
                PinChanged(sender, e);
            }
        }


        private void btn_Click(object sender, EventArgs e)
        {
#if !Smartphone
            Button b = (Button)sender;
            if (!IsEntered)
            {
                txtPin.Text += b.Text;
            }
#endif
        }

        private void txtPin_TextChanged(object sender, EventArgs e)
        {
            OnPinChanged(sender, EventArgs.Empty);
        }

        private void btnBack_Click(object sender, EventArgs e)
        {
#if !Smartphone
            if (txtPin.Text.Length > 0)
            {
                txtPin.Text = txtPin.Text.Substring(0, txtPin.Text.Length - 1);
            }
#endif
        }
    }
}