Make collapsable categories

functions/private/Find-AppsByNameOrDescription.ps1

@@ -16,8 +16,26 @@ function Find-AppsByNameOrDescription {
             $_.Visibility = [Windows.Visibility]::Visible
             $_.Children | ForEach-Object {
                 if ($null -ne $_) {
+                    # Respect the collapsed state of categories (indicated by + prefix)
+                    if ($_.Tag -like "CategoryToggleButton" -and $_.Content -like "+*") {
+                        # Keep category label visible but don't expand the WrapPanel
                         $_.Visibility = [Windows.Visibility]::Visible
                     }
+                    elseif ($_.Tag -like "CategoryWrapPanel_*") {
+                        # Check if parent category is collapsed (has + prefix)
+                        $categoryLabel = $_.Parent.Children[0]
+                        if ($categoryLabel.Content -like "+*") {
+                            # Keep collapsed
+                            $_.Visibility = [Windows.Visibility]::Collapsed
+                        } else {
+                            # Expand
+                            $_.Visibility = [Windows.Visibility]::Visible
+                        }
+                    }
+                    else {
+                        $_.Visibility = [Windows.Visibility]::Visible
+                    }
+                }
 
             }
         }
@@ -32,18 +50,29 @@ function Find-AppsByNameOrDescription {
         # Hide all CategoryWrapPanel and ToggleButton
         $_.Visibility = [Windows.Visibility]::Collapsed
         if ($_.Tag -like "CategoryWrapPanel_*") {
+            $categoryHasMatch = $false
             # Search for Apps that match the search string
             $_.Children | Foreach-Object {
                 $appEntry = $sync.configs.applicationsHashtable.$($_.Tag)
                 if ($appEntry.Content -like "*$SearchString*" -or $appEntry.Description -like "*$SearchString*") {
-                    # Show the App and the parent CategoryWrapPanel if the string is found
+                    # Show the App and mark that this category has a match
                     $_.Visibility = [Windows.Visibility]::Visible
-                    $_.parent.Visibility = [Windows.Visibility]::Visible
+                    $categoryHasMatch = $true
                 }
                 else {
                     $_.Visibility = [Windows.Visibility]::Collapsed
                 }
             }
+
+            # If category has matches, show the WrapPanel and update the category label to expanded state
+            if ($categoryHasMatch) {
+                $_.Visibility = [Windows.Visibility]::Visible
+                # Update category label to show expanded state (-)
+                $categoryLabel = $_.Parent.Children[0]
+                if ($categoryLabel.Content -like "+*") {
+                    $categoryLabel.Content = $categoryLabel.Content -replace "^\+ ", "- "
+                }
+            }
         }
     }
 }

functions/private/Initialize-InstallAppArea.ps1

@@ -41,13 +41,13 @@
         $itemsControl.VerticalAlignment = 'Stretch'
         $scrollViewer.Content = $itemsControl
 
-        # Enable virtualization for the ItemsControl to improve performance (It's hard to test if this is actually working, so if you know what you're doing, please check this)
+        # Use WrapPanel to create dynamic columns based on AppEntryWidth and window width
         $itemsPanelTemplate = New-Object Windows.Controls.ItemsPanelTemplate
-        $factory = New-Object Windows.FrameworkElementFactory ([Windows.Controls.VirtualizingStackPanel])
+        $factory = New-Object Windows.FrameworkElementFactory ([Windows.Controls.WrapPanel])
+        $factory.SetValue([Windows.Controls.WrapPanel]::OrientationProperty, [Windows.Controls.Orientation]::Horizontal)
+        $factory.SetValue([Windows.Controls.WrapPanel]::HorizontalAlignmentProperty, [Windows.HorizontalAlignment]::Left)
         $itemsPanelTemplate.VisualTree = $factory
         $itemsControl.ItemsPanel = $itemsPanelTemplate
-        $itemsControl.SetValue([Windows.Controls.VirtualizingStackPanel]::IsVirtualizingProperty, $true)
-        $itemsControl.SetValue([Windows.Controls.VirtualizingStackPanel]::VirtualizationModeProperty, [Windows.Controls.VirtualizationMode]::Recycling)
 
         # Add the Border containing the App Area to the target Grid
         $targetGrid.Children.Add($Border) | Out-Null

functions/private/Initialize-InstallCategoryAppList.ps1

@@ -15,22 +15,6 @@ function Initialize-InstallCategoryAppList {
             $TargetElement,
             $Apps
         )
-        function Add-Category {
-            param(
-                [string]$Category,
-                [Windows.Controls.ItemsControl]$TargetElement
-            )
-
-            $toggleButton = New-Object Windows.Controls.Label
-            $toggleButton.Content = "$Category"
-            $toggleButton.Tag = "CategoryToggleButton"
-            $toggleButton.SetResourceReference([Windows.Controls.Control]::FontSizeProperty, "HeaderFontSize")
-            $toggleButton.SetResourceReference([Windows.Controls.Control]::FontFamilyProperty, "HeaderFontFamily")
-            $sync.$Category = $toggleButton
-
-            $null = $TargetElement.Items.Add($toggleButton)
-        }
-
 
         # Pre-group apps by category
         $appsByCategory = @{}
@@ -42,15 +26,68 @@ function Initialize-InstallCategoryAppList {
             $appsByCategory[$category] += $appKey
         }
         foreach ($category in $($appsByCategory.Keys | Sort-Object)) {
-            Add-Category -Category $category -TargetElement $TargetElement
+            # Create a container for category label + apps
+            $categoryContainer = New-Object Windows.Controls.StackPanel
+            $categoryContainer.Orientation = "Vertical"
+            $categoryContainer.Margin = New-Object Windows.Thickness(0, 0, 0, 0)
+            $categoryContainer.HorizontalAlignment = [Windows.HorizontalAlignment]::Stretch
+
+            # Bind Width to the ItemsControl's ActualWidth to force full-row layout in WrapPanel
+            $binding = New-Object Windows.Data.Binding
+            $binding.Path = New-Object Windows.PropertyPath("ActualWidth")
+            $binding.RelativeSource = New-Object Windows.Data.RelativeSource([Windows.Data.RelativeSourceMode]::FindAncestor, [Windows.Controls.ItemsControl], 1)
+            [void][Windows.Data.BindingOperations]::SetBinding($categoryContainer, [Windows.FrameworkElement]::WidthProperty, $binding)
+
+            # Add category label to container
+            $toggleButton = New-Object Windows.Controls.Label
+            $toggleButton.Content = "- $Category"
+            $toggleButton.Tag = "CategoryToggleButton"
+            $toggleButton.SetResourceReference([Windows.Controls.Control]::FontSizeProperty, "HeaderFontSize")
+            $toggleButton.SetResourceReference([Windows.Controls.Control]::FontFamilyProperty, "HeaderFontFamily")
+            $toggleButton.Cursor = [System.Windows.Input.Cursors]::Hand
+            $toggleButton.HorizontalAlignment = [Windows.HorizontalAlignment]::Stretch
+            $sync.$Category = $toggleButton
+
+            # Add click handler to toggle category visibility
+            $toggleButton.Add_MouseLeftButtonUp({
+                param($sender, $e)
+
+                # Find the parent StackPanel (categoryContainer)
+                $categoryContainer = $sender.Parent
+                if ($categoryContainer -and $categoryContainer.Children.Count -ge 2) {
+                    # The WrapPanel is the second child
+                    $wrapPanel = $categoryContainer.Children[1]
+
+                    # Toggle visibility
+                    if ($wrapPanel.Visibility -eq [Windows.Visibility]::Visible) {
+                        $wrapPanel.Visibility = [Windows.Visibility]::Collapsed
+                        # Change - to +
+                        $sender.Content = $sender.Content -replace "^- ", "+ "
+                    } else {
+                        $wrapPanel.Visibility = [Windows.Visibility]::Visible
+                        # Change + to -
+                        $sender.Content = $sender.Content -replace "^\+ ", "- "
+                    }
+                }
+            })
+
+            $null = $categoryContainer.Children.Add($toggleButton)
+
+            # Add wrap panel for apps to container
             $wrapPanel = New-Object Windows.Controls.WrapPanel
-            $wrapPanel.Orientation = "Vertical"
-            $wrapPanel.HorizontalAlignment = "Stretch"
-            $wrapPanel.VerticalAlignment = "Center"
-            $wrapPanel.Margin = New-Object Windows.Thickness(0, 0, 0, 20)
+            $wrapPanel.Orientation = "Horizontal"
+            $wrapPanel.HorizontalAlignment = "Left"
+            $wrapPanel.VerticalAlignment = "Top"
+            $wrapPanel.Margin = New-Object Windows.Thickness(0, 0, 0, 0)
             $wrapPanel.Visibility = [Windows.Visibility]::Visible
             $wrapPanel.Tag = "CategoryWrapPanel_$category"
-            $null = $TargetElement.Items.Add($wrapPanel)
+
+            $null = $categoryContainer.Children.Add($wrapPanel)
+
+            # Add the entire category container to the target element
+            $null = $TargetElement.Items.Add($categoryContainer)
+
+            # Add apps to the wrap panel
             $appsByCategory[$category] | Sort-Object | ForEach-Object {
                 $sync.$_ = $(Initialize-InstallAppEntry -TargetElement $wrapPanel -AppKey $_)
             }

xaml/inputXML.xaml

@@ -107,8 +107,8 @@
                                     BorderBrush="{DynamicResource MainForegroundColor}"
                                     Background="{DynamicResource ButtonBackgroundColor}"
                                     BorderThickness="1"
-                                    Width="16"
-                                    Height="16"
+                                    Width="12"
+                                    Height="12"
                                     CornerRadius="2"/>
                             <Path x:Name="CheckMark"
                                   Stroke="{DynamicResource ToggleButtonOnColor}"