[C#] 21일차 - 159. WPF DispatcherTimer와 깜박이는 프로그램

WPF는 타이머 기능을 DispatcherTimer를 사용해 구현한다.

<Window x:Class="A159_WPF_Blinker.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:A159_WPF_Blinker"
        mc:Ignorable="d"
        Title="MainWindow" Height="250" Width="400">
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition/>
            <ColumnDefinition/>
        </Grid.ColumnDefinitions>
        <Grid.RowDefinitions>
            <RowDefinition Height="170"/>
            <RowDefinition/>
        </Grid.RowDefinitions>
        <Button Name="btnGreen" Background="Green" Margin="40" Click="btnGreen_Click"></Button>
        <Button Name="btnRed" Grid.Column="1" Background="Red" Margin="40" Click="btnRed_Click"></Button>
        <TextBlock Grid.Row="1" FontSize="20" HorizontalAlignment="Center">Strat Blinking!</TextBlock>
        <TextBlock Grid.Row="1" Grid.Column="1" FontSize="20" HorizontalAlignment="Center">Stop Blinking!</TextBlock>
    </Grid>
</Window>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Windows.Threading; // DispatcherTimer

namespace A159_WPF_Blinker
{
    /// <summary>
    /// MainWindow.xaml에 대한 상호 작용 논리
    /// </summary>
    public partial class MainWindow : Window
    {
        DispatcherTimer t = new DispatcherTimer();

        public MainWindow()
        {
            InitializeComponent();
            t.Interval = new TimeSpan(5000000); // 단위 Tick, 0.5초
            t.Tick += T_Tick;
        }

        private void T_Tick(object sender, EventArgs e)
        {
            if(btnRed.Background == Brushes.Red)
            {
                btnRed.ClearValue(Button.BackgroundProperty);
                btnGreen.Background = Brushes.Green;
            }else
            {
                btnGreen.ClearValue(Button.BackgroundProperty);
                btnRed.Background = Brushes.Red;
            }
        }
        private void btnGreen_Click(object sender, RoutedEventArgs e)
        {
            t.Start();

        }

        private void btnRed_Click(object sender, RoutedEventArgs e)
        {
            t.Stop();

        }
    }
}