Paging implemented in subtask lists

Author: BinderDyn

.vs/TakeMyTime.NETCore/DesignTimeBuild/.dtbcache

@@ -12,12 +12,13 @@
         WindowStyle="None"
         Title="{x:Static resources:SubtaskList.Title}"
         mc:Ignorable="d"
-        Height="450" Width="800">
+        Height="600" Width="800">
 
     <Grid>
         <Grid.RowDefinitions>
             <RowDefinition Height="20"></RowDefinition>
             <RowDefinition Height="*"></RowDefinition>
+            <RowDefinition Height="40"></RowDefinition>
             <RowDefinition Height="60"></RowDefinition>
         </Grid.RowDefinitions>
         <Border x:Name="b_Toolbar"
@@ -151,7 +152,21 @@
                     </ListView>
             </StackPanel>
         </Grid>
-        <StackPanel Grid.Row="2"
+        <Border Grid.Row="2">
+            <StackPanel HorizontalAlignment="Center" Orientation="Horizontal">
+                <Button x:Name="btn_PagingBack" Background="Black" Click="btn_PagingBack_Click">
+                    <materialDesign:PackIcon Kind="ArrowLeft"></materialDesign:PackIcon>
+                </Button>
+                <Button x:Name="btn_CurrentPage" IsEnabled="False" Background="Black" Foreground="White">
+                </Button>
+                <Button x:Name="btn_PagingForward" Background="Black" Click="btn_PagingForward_Click">
+                    <materialDesign:PackIcon Kind="ArrowRight"></materialDesign:PackIcon>
+                </Button>
+                <Button x:Name="btn_allPages" Background="Black" IsEnabled="False">
+                </Button>
+            </StackPanel>
+        </Border>
+        <StackPanel Grid.Row="3"
                     Orientation="Horizontal"
                     HorizontalAlignment="Center"
                     Width="300"

.vs/TakeMyTime.NETCore/v16/.suo

@@ -13,6 +13,7 @@
 using TakeMyTime.BLL.Logic;
 
 using TakeMyTime.Models.Models;
+using TakeMyTime.WPF.Utility;
 
 namespace TakeMyTime.WPF.Subtasks
 {
@@ -24,15 +25,26 @@ public partial class SubtaskList : Window
         public SubtaskList(int assignment_id)
         {
             InitializeComponent();
+            this.PagingManager = new PagingManager<SubtaskGridViewModel>(6);
             Load(assignment_id);
+            this.RefreshBindings(1);
+        }
+
+        private void RefreshBindings(int page)
+        {
+            this.lv_Subtasks.ItemsSource = this.PagingManager.Page(page);
+            this.btn_CurrentPage.Content = this.PagingManager.CurrentPage;
+            this.btn_allPages.Content = this.PagingManager.MaxPage;
+            this.btn_PagingForward.IsEnabled = this.PagingManager.CanPageForward;
+            this.btn_PagingBack.IsEnabled = this.PagingManager.CanPageBack;
         }
 
         private void Load(int assignment_id)
         {
             var assignmentLogic = new AssignmentLogic();
             this.Assignment = assignmentLogic.GetAssignmentById(assignment_id);
             this.GridViewModels = Assignment.Subtasks.Select(s => new SubtaskGridViewModel(s)).ToList();
-            this.lv_Subtasks.ItemsSource = this.GridViewModels;
+            this.PagingManager.Data = this.GridViewModels;
             assignmentLogic.Dispose();
         }
 
@@ -65,6 +77,7 @@ private void btn_DeleteSubtask_Click(object sender, RoutedEventArgs e)
                 assignmentLogic.DeleteSubtask(this.Assignment.Id, this.SelectedSubtask.Id);
                 assignmentLogic.Dispose();
                 Load(this.Assignment.Id);
+                RefreshBindings(this.PagingManager.CurrentPage);
             }
         }
 
@@ -75,6 +88,7 @@ private void btn_EditSubtask_Click(object sender, RoutedEventArgs e)
                 var subtaskEditDialog = new AddSubtask(this.SelectedSubtask.Id, this.Assignment.Id);
                 subtaskEditDialog.ShowDialog();
                 Load(this.Assignment.Id);
+                RefreshBindings(this.PagingManager.CurrentPage);
             }
         }
 
@@ -83,6 +97,17 @@ private void btn_AddSubtask_Click(object sender, RoutedEventArgs e)
             var subtaskAddDialog = new AddSubtask(this.Assignment.Id);
             subtaskAddDialog.ShowDialog();
             Load(this.Assignment.Id);
+            RefreshBindings(this.PagingManager.CurrentPage);
+        }
+
+        private void btn_PagingBack_Click(object sender, RoutedEventArgs e)
+        {
+            this.RefreshBindings(this.PagingManager.CurrentPage - 1);
+        }
+
+        private void btn_PagingForward_Click(object sender, RoutedEventArgs e)
+        {
+            this.RefreshBindings(this.PagingManager.CurrentPage + 1);
         }
 
         private void btn_SaveSubtasks_Click(object sender, RoutedEventArgs e)
@@ -95,5 +120,8 @@ private void btn_SaveSubtasks_Click(object sender, RoutedEventArgs e)
         public Assignment Assignment { get; set; }
         public List<SubtaskGridViewModel> GridViewModels { get; set; }
         public SubtaskGridViewModel SelectedSubtask { get; set; }
+        public PagingManager<SubtaskGridViewModel> PagingManager { get; set; }
+
+        
     }
 }

TakeMyTime.WPF/Subtasks/SubtaskList.xaml

@@ -35,7 +35,16 @@ public IList<T> Page(int page)
         public IList<T> Data { get; set; }
         public int PageSize { get; private set; }
         public int CurrentPage { get; private set; }
-        public int MaxPage { get => this.GetAllPages(); }
+        public int MaxPage 
+        { 
+            get
+            {
+                int result = 1;
+                var maxPage = this.GetAllPages();
+                if (maxPage <= 0) return result;
+                else return maxPage;
+            } 
+        }
         public bool CanPageBack { get => this.CurrentPage > 1; }
         public bool CanPageForward { get => this.CurrentPage < MaxPage; }
     }