dotNetStudyWithGPT/MySolution/ToDoApp/MainWindow.xaml

<Window x:Class="ToDoApp.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:ToDoApp" xmlns:subcontrol="clr-namespace:ToDoApp.SubControl"
        mc:Ignorable="d"
        Title="To Do" Height="800" Width="1000" WindowStartupLocation="CenterScreen"
        Icon="./Resource/ToDo.png">

    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="200"/>
            <ColumnDefinition Width="*"/>
            <ColumnDefinition Width="250"/>
        </Grid.ColumnDefinitions>

        <Grid Grid.Column="0" Margin="5" Background="WhiteSmoke">
            <Grid.RowDefinitions>
                <RowDefinition Height="70"/>
                <RowDefinition Height="40"/>
                <RowDefinition Height="*"/>
            </Grid.RowDefinitions>

            <StackPanel Grid.Row="0" Orientation="Vertical" Margin="15">
                <TextBlock x:Name="tbName" Text="Name" HorizontalAlignment="Left"
                           FontSize="15" FontWeight="Bold"/>
                <TextBlock x:Name="tbEmail" Text="mail@mail.com" HorizontalAlignment="Left"/>
            </StackPanel>

            <subcontrol:PlaceholderTextBox x:Name="tbxSearch" Grid.Row="1" VerticalAlignment="Center" TPlaceholder="검색" THeight="20"
                                           KeyDown="tbxSearch_KeyDown"/>

            <StackPanel Grid.Row="2" Orientation="Vertical">
                <Button x:Name="btnToday" Content="☀️ 오늘 할 일" Height="30" Margin="5" Background="Transparent" BorderThickness="0" HorizontalContentAlignment="Left"
                        Click="btnToday_Click"/>
                <Button x:Name="btnPlanned" Content="📅 계획된 일정" Height="30" Margin="5" Background="Transparent" BorderThickness="0" HorizontalContentAlignment="Left"
                        Click="btnPlanned_Click"/>
                <Button x:Name="btnFinished" Content="✅ 완료됨" Height="30" Margin="5" Background="Transparent" BorderThickness="0" HorizontalContentAlignment="Left"
                        Click="btnCompleted_Click"/>
                <Label Background="Gray" Height="1"/>
                <Button x:Name="btnToDo" Content="💡 To Do" Height="30" Margin="5" Background="Transparent" BorderThickness="0" HorizontalContentAlignment="Left"
                        Click="btnToDo_Click"/>
            </StackPanel>
        </Grid>

        <Grid Grid.Column="1" Margin="20">
            <Grid.RowDefinitions>
                <RowDefinition Height="30"/>
                <RowDefinition Height="*"/>
                <RowDefinition Height="40"/>
            </Grid.RowDefinitions>

            <TextBlock x:Name="tbTitle" Grid.Row="0" VerticalAlignment="Center" Text="Title"
                       FontSize="25" FontWeight="Bold"/>
            <ListBox x:Name="lbxContent" Grid.Row="1" HorizontalContentAlignment="Left" BorderThickness="0" Margin="0 10 0 0"
                     SelectionChanged="lbxContent_SelectionChanged"/>

            <subcontrol:PlaceholderTextBox x:Name="tbxNewItemName" Grid.Row="2" VerticalAlignment="Center" TPlaceholder="작업 추가" THeight="20"
                                           KeyDown="tbxNewItem_KeyDown"/>
        </Grid>

        <Grid Grid.Column="2" Margin="5" Background="WhiteSmoke">
            <Grid.RowDefinitions>
                <RowDefinition Height="*"/>
                <RowDefinition Height="50"/>
            </Grid.RowDefinitions>

            <StackPanel Grid.Row="0" Orientation="Vertical" Margin="5">
                <subcontrol:PlaceholderTextBox x:Name="tbxItemName" VerticalAlignment="Center" TPlaceholder="할 일" TForeground="Black" THeight="40"
                   TFontWeight="Bold" TFontSize="20"/>
                <TextBlock x:Name="tbItemCreatedAt" Foreground="Gray" TextAlignment="Right"/>
                <StackPanel Orientation="Horizontal" Margin="0 5 0 0">
                    <CheckBox x:Name="chkItemToday" Background="Transparent"/>
                    <TextBlock Text="나의 하루에 추가" Margin="10 0 0 0" Background="Transparent"/>
                </StackPanel>
                <DatePicker x:Name="dpItemDueDate" Margin="0 5 0 0" Background="Transparent"/>
                <subcontrol:PlaceholderTextBox x:Name="tbxItemDescription" Margin="0 5 0 0" TPlaceholder="메모" TForeground="Black" THeight="200" TVerticalAlignment="Top"/>
            </StackPanel>

            <Grid Grid.Row="1">
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="*"/>
                    <ColumnDefinition Width="50"/>
                </Grid.ColumnDefinitions>

                <Button x:Name="btnUpdate" Grid.Column="0" Content="업데이트" Background="Transparent" BorderThickness="0" Margin="3"
                        Click="btnUpdate_Click"/>
                <Button x:Name="btnDelete" Grid.Column="1" Content="🗑️" Background="Transparent" BorderThickness="0" Margin="3"
                        Click="btnDelete_Click"/>
            </Grid>
        </Grid>

        
    </Grid>
</Window>