Add a place-holder code ListView

Set up a notifiable property to control whether the "launch panel"
(i.e. the thing you see when the app launches) or the code ListView
is visible.  Unearthed the magic required to left-justify the column
headers.

SourceGenWPF/MainController.cs

@@ -70,6 +70,11 @@ namespace SourceGenWPF {
         #endregion Project state
 
 
+        /// <summary>
+        /// Reference back to MainWindow object.
+        /// </summary>
+        private MainWindow mMainWin;
+
         /// <summary>
         /// List of recently-opened projects.
         /// </summary>
@@ -142,6 +147,10 @@ namespace SourceGenWPF {
         /// </summary>
         private bool mUseMainAppDomainForPlugins = false;
 
+        public MainController(MainWindow win) {
+            mMainWin = win;
+        }
+
 
         /// <summary>
         /// Ensures that the named project is at the top of the list.  If it's elsewhere
@@ -477,6 +486,7 @@ namespace SourceGenWPF {
             ShowNoProject();
             InvalidateControls(null);
 #endif
+            mMainWin.ShowCodeListView = false;
 
             mGenerationLog = null;
 
@@ -538,6 +548,8 @@ namespace SourceGenWPF {
             RefreshProject(UndoableChange.ReanalysisScope.CodeAndData);
             //ShowProject();
             //InvalidateControls(null);
+            mMainWin.ShowCodeListView = true;
+            mNavStack.Clear();
 
             // Want to do this after ShowProject() or we see a weird glitch.
             UpdateRecentProjectList(mProjectPathName);

SourceGenWPF/ProjWin/MainWindow.xaml

@@ -31,6 +31,13 @@ limitations under the License.
             </RoutedUICommand.InputGestures>
         </RoutedUICommand>
         <RoutedUICommand x:Key="RecentProject"/>
+
+        <!-- don't center the ListView(GridView) column headers
+             https://stackoverflow.com/questions/44119146/wpf-listview-column-header-alignment
+          -->
+        <Style TargetType="{x:Type GridViewColumnHeader}">
+            <Setter Property="HorizontalContentAlignment" Value="Left" />
+        </Style>
     </Window.Resources>
 
     <Window.CommandBindings>
@@ -172,7 +179,8 @@ limitations under the License.
                               HorizontalAlignment="Stretch" VerticalAlignment="Center"/>
             </Grid>
 
-            <Grid Name="CenterPanel" Grid.Column="2">
+            <Grid Name="launchPanel" Grid.Column="2"
+                  Visibility="{Binding Path=LaunchPanelVisibility}" d:IsHidden="True">
                 <Grid.RowDefinitions>
                     <RowDefinition Height="Auto"/>
                     <RowDefinition Height="*"/>
@@ -207,6 +215,24 @@ limitations under the License.
                 </StackPanel>
             </Grid>
 
+            <ListView Name="codeListView" Grid.Column="2"
+                      FontFamily="{StaticResource GeneralMonoFont}"
+                      Visibility="{Binding Path=CodeListVisibility}">
+                <ListView.View>
+                    <GridView AllowsColumnReorder="False">
+                        <GridViewColumn Header="Offset"/>
+                        <GridViewColumn Header="Addr"/>
+                        <GridViewColumn Header="Bytes"/>
+                        <GridViewColumn Header="Flags"/>
+                        <GridViewColumn Header="Attr"/>
+                        <GridViewColumn Header="Label"/>
+                        <GridViewColumn Header="Opcode"/>
+                        <GridViewColumn Header="Operand"/>
+                        <GridViewColumn Header="Comment"/>
+                    </GridView>
+                </ListView.View>
+            </ListView>
+
             <Grid Name="RightPanel" Grid.Column="4">
                 <Grid.RowDefinitions>
                     <RowDefinition Height="*" MinHeight="100"/>

SourceGenWPF/ProjWin/MainWindow.xaml.cs

@@ -15,8 +15,10 @@
  */
 using System;
 using System.Collections.Generic;
+using System.ComponentModel;
 using System.Diagnostics;
 using System.Linq;
+using System.Runtime.CompilerServices;
 using System.Text;
 using System.Threading.Tasks;
 using System.Windows;
@@ -32,11 +34,8 @@ namespace SourceGenWPF.ProjWin {
     /// <summary>
     /// Interaction logic for MainWindow.xaml
     /// </summary>
-    public partial class MainWindow : Window {
-        public string ProgramVersionString {
-            get { return App.ProgramVersion.ToString(); }
-        }
-
+    public partial class MainWindow : Window, INotifyPropertyChanged {
+        /// <summary>
         private MainController mUI;
 
         public MainWindow() {
@@ -44,7 +43,62 @@ namespace SourceGenWPF.ProjWin {
 
             // TODO: verify that RuntimeData dir is accessible
 
-            mUI = new MainController();
+            this.DataContext = this;
+            mUI = new MainController(this);
+        }
+
+
+        /// <summary>
+        /// INotifyPropertyChanged event
+        /// </summary>
+        public event PropertyChangedEventHandler PropertyChanged;
+
+        /// <summary>
+        /// Call this when a notification-worthy property changes value.
+        /// 
+        /// The CallerMemberName attribute puts the calling property's name in the first arg.
+        /// </summary>
+        /// <param name="propertyName">Name of property that changed.</param>
+        private void NotifyPropertyChanged([CallerMemberName] string propertyName = "") {
+            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+        }
+
+        private bool mShowCodeListView;
+
+        /// <summary>
+        /// Which panel are we showing, launchPanel or codeListView?
+        /// </summary>
+        public bool ShowCodeListView {
+            get {
+                return mShowCodeListView;
+            }
+            set {
+                mShowCodeListView = value;
+                NotifyPropertyChanged("LaunchPanelVisibility");
+                NotifyPropertyChanged("CodeListVisibility");
+            }
+        }
+
+        /// <summary>
+        /// Returns true if we should be showing the launch panel.
+        /// (Intended for use from XAML.)
+        /// </summary>
+        public Visibility LaunchPanelVisibility {
+            get { return mShowCodeListView ? Visibility.Hidden : Visibility.Visible; }
+        }
+
+        /// <summary>
+        /// Returns true if we should be showing the code ListView.
+        /// (Intended for use from XAML.)
+        /// </summary>
+        public Visibility CodeListVisibility {
+            get { return mShowCodeListView ? Visibility.Visible : Visibility.Hidden; }
+        }
+
+        /// Version string, for display.
+        /// </summary>
+        public string ProgramVersionString {
+            get { return App.ProgramVersion.ToString(); }
         }
 
         private void AssembleCmd_Executed(object sender, ExecutedRoutedEventArgs e) {