### Swift Grid Flow Example (Rows vs. Columns)

Source: https://github.com/exyte/grid/blob/master/README.md

Demonstrates how to switch the grid flow between .rows and .columns using a @State variable and a button. This example shows the basic setup for controlling grid direction.

```swift
struct ContentView: View {
    @State var flow: GridFlow = .rows
    
    var body: some View {
        VStack {
            if self.flow == .rows {
                Button(action: { self.flow = .columns }) {
                    Text("Flow: ROWS")
                }
            } else {
                Button(action: { self.flow = .rows }) {
                    Text("Flow: COLUMNS")
                }
            }
            
            Grid(0..<15, tracks: 5, flow: self.flow, spacing: 5) {
                ColorView($0.isMultiple(of: 2) ? .black : .orange)
                    .overlay(
                        Text(String($0))
                            .font(.system(size: 35))
                            .foregroundColor(.white)
                )
            }
            .animation(.default)
        }
    }
}
```

--------------------------------

### Build Grid from Sources

Source: https://github.com/exyte/grid/blob/master/README.md

Instructions for cloning the Grid repository, installing dependencies using CocoaPods, and opening the example project in Xcode.

```shell
git clone git@github.com:exyte/Grid.git
cd Grid/Example/
pod install
open Example.xcworkspace/
```

--------------------------------

### Install Grid with CocoaPods

Source: https://github.com/exyte/grid/blob/master/README.md

This snippet shows how to add the Grid library to your project using CocoaPods by adding 'ExyteGrid' to your Podfile.

```ruby
pod 'ExyteGrid'
```

--------------------------------

### Setting Explicit Start Positions for Grid Items

Source: https://github.com/exyte/grid/blob/master/README.md

Shows how to precisely position grid items using the .gridStart modifier, specifying both column and row. Views are auto-placed if no start position is defined. The library prioritizes placement for views with both row and column starts, then for views with one specified, and finally for auto-placed views.

```swift
Grid(tracks: [.pt(50), .fr(1), .fr(1.5), .fit]) {
    ForEach(0..<6) { _ in
        ColorView(.black)
    }
    
    ColorView(.brown)
        .gridSpan(column: 3)
    
    ColorView(.blue)
        .gridSpan(column: 2)
    
    ColorView(.orange)
        .gridSpan(row: 3)
    
    ColorView(.red)
        .gridStart(row: 1)
        .gridSpan(column: 2, row: 2)
    
    ColorView(.yellow)
        .gridStart(row: 2)
    
    ColorView(.purple)
        .frame(maxWidth: 50)
        .gridStart(column: 3, row: 0)
        .gridSpan(row: 9)
    
    ColorView(.green)
        .gridSpan(column: 2, row: 3)
    
    ColorView(.cyan)
    
    ColorView(.gray)
        .gridStart(column: 2)
}
```

--------------------------------

### Swift Grid Content Mode: Scroll (Columns Flow)

Source: https://github.com/exyte/grid/blob/master/README.md

Illustrates setting the grid content mode to .scroll for a grid with columns flow. This example uses a custom `HCardView` and applies `.gridContentMode`, `.gridFlow`, and `.gridPacking` modifiers.

```swift
struct HCardView: View {
    let text: String
    let color: UIColor

    var body: some View {
        HStack {
            Image("dog")
                .resizable()
                .aspectRatio(contentMode: .fit)
                .cornerRadius(5)
            
            Text(self.text)
                .frame(maxWidth: 200)
        }
        .padding(5)
        .gridCellBackground { _ in
            ColorView(self.color)
        }
        .gridCellOverlay { _ in
            RoundedRectangle(cornerRadius: 5)
                .strokeBorder(Color(self.color.darker()),
                              lineWidth: 3)
        }
    }
}

struct ContentView: View {
    var body: some View {
        Grid(tracks: 3) {
            ForEach(0..<8) {
                HCardView(text: randomText(), color: .random)
                    .gridSpan(row: self.randomSpan)
            }
        }
        .gridContentMode(.scroll)
        .gridFlow(.columns)
        .gridPacking(.dense)
    }
    
    var randomSpan: Int {
        Int(arc4random_uniform(3)) + 1
    }
}
```

--------------------------------

### SwiftUI Grid Handling Outer Data Changes in @GridBuilder

Source: https://github.com/exyte/grid/blob/master/README.md

Addresses an issue where Grid content using outer data (like @State variables) might not update. This example demonstrates the problem and the expected behavior with state changes.

```swift
import SwiftUI

struct ContentView: View {
    @State var titleText: String = "Initial Title"

    var body: some View {
        Grid(tracks: 2) {
            Text(titleText)
            Text("Static Text")
        }
        .onAppear {
            // Simulate a data change
            DispatchQueue.main.asyncAfter(deadline: .now() + 2) {
                titleText = "Updated Title"
            }
        }
    }
}
```

--------------------------------

### Initialize Grid with Content-Based Fit Tracks

Source: https://github.com/exyte/grid/blob/master/README.md

Initializes a Grid using a range of integers and track sizes set to '.fit'. Each track will automatically adjust its size to accommodate the maximum content size within that track.

```swift
Grid(0..<6, tracks: [.fit, .fit, .fit]) {
    ColorView(.random)
        .frame(maxWidth: 50 + 15 * CGFloat($0))
}
```

--------------------------------

### Initialize Grid using Range

Source: https://github.com/exyte/grid/blob/master/README.md

Initializes a Grid by specifying a range of integers for content generation and the number of tracks. A closure is used to create views for each element in the range.

```swift
Grid(0..<6, tracks: 3) {
    ColorView(.random)
}
```

--------------------------------

### Initialize Grid with Tracks and Views

Source: https://github.com/exyte/grid/blob/master/README.md

Initializes a Grid view by specifying the number of tracks and providing child views within a ViewBuilder closure. This is a straightforward way to create a grid layout.

```swift
Grid(tracks: 3) {
    ColorView(.blue)
    ColorView(.purple)
    ColorView(.red)
    ColorView(.cyan)
    ColorView(.green)
    ColorView(.orange)
}
```

--------------------------------

### SwiftUI Grid Spacing: Int, Array, and Explicit Initializers

Source: https://github.com/exyte/grid/blob/master/README.md

Demonstrates multiple ways to define spacing in SwiftUI Grids: using a single Int for uniform spacing, an array for distinct horizontal and vertical spacing, and an explicit GridSpacing initializer.

```swift
import SwiftUI

struct SpacingExample: View {
    @State var vSpacing: CGFloat = 0
    @State var hSpacing: CGFloat = 0

    var body: some View {
        VStack {
            // Assuming sliders are defined elsewhere
            // self.sliders
            
            Grid(tracks: 3, spacing: [hSpacing, vSpacing]) {
                ForEach(0..<21) { index in
                    //Inner image used to measure size
                    self.imagePlaceholder
                        .aspectRatio(contentMode: .fit)
                        .opacity(0)
                        .gridSpan(column: max(1, index % 4))
                        .gridCellOverlay {
                            //This one is to display
                            self.imagePlaceholder
                                .aspectRatio(contentMode: .fill)
                                .frame(width: $0?.width, 
                                       height: $0?.height)
                                .cornerRadius(5)
                                .clipped()
                                .shadow(color: self.shadowColorPlaceholder, 
                                        radius: 10, x: 0, y: 0)
                        }
                }
            }
            .background(self.backgroundColorPlaceholder)
            .gridContentMode(.scroll)
            .gridPacking(.dense)
        }
    }
    
    // Placeholder for image view
    var imagePlaceholder: some View {
        Image(systemName: "photo") // Using a system image as a placeholder
    }
    
    // Placeholder for shadow color
    var shadowColorPlaceholder: Color { .gray }
    
    // Placeholder for background color
    var backgroundColorPlaceholder: Color { .white }
}

// Placeholder for Grid struct and modifiers
struct Grid<Content: View>: View {
    let tracks: Int
    let spacing: GridSpacing
    let content: () -> Content

    init(tracks: Int, spacing: CGFloat = 0, @ViewBuilder content: @escaping () -> Content) {
        self.tracks = tracks
        self.spacing = GridSpacing(horizontal: spacing, vertical: spacing)
        self.content = content
    }
    
    init(tracks: Int, spacing: [CGFloat], @ViewBuilder content: @escaping () -> Content) {
        self.tracks = tracks
        self.spacing = GridSpacing(horizontal: spacing.first ?? 0, vertical: spacing.last ?? 0)
        self.content = content
    }
    
    init(tracks: Int, spacing: GridSpacing, @ViewBuilder content: @escaping () -> Content) {
        self.tracks = tracks
        self.spacing = spacing
        self.content = content
    }
    
    var body: some View {
        // Dummy implementation for compilation
        VStack {
            Text("Grid Placeholder")
        }
    }
    
    func gridContentMode(_ mode: GridContentMode) -> Self {
        return self
    }
    func gridPacking(_ packing: GridPacking) -> Self {
        return self
    }
}

// Placeholder for GridSpacing struct
struct GridSpacing {
    var horizontal: CGFloat = 0
    var vertical: CGFloat = 0
}

// Placeholder for GridSpan modifier
struct GridSpanModifier: ViewModifier {
    var column: Int = 1
    func body(content: Content) -> some View {
        content
    }
}

struct GridSpan {
    var column: Int = 1
    var row: Int = 1
}

extension View {
    func gridSpan(column: Int = 1, row: Int = 1) -> some View {
        modifier(GridSpanModifier(column: column))
    }
    func gridCellOverlay<OverlayContent: View>(@ViewBuilder _ overlayContent: @escaping (OverlayCoordinate?) -> OverlayContent) -> some View {
        self // Dummy implementation
    }
    func gridContentMode(_ mode: GridContentMode) -> Self {
        return self
    }
    func gridPacking(_ packing: GridPacking) -> Self {
        return self
    }
    func background(_ color: Color) -> some View {
        self // Dummy implementation
    }
}

// Placeholder for GridContentMode enum
enum GridContentMode { case scroll }
// Placeholder for GridPacking enum
enum GridPacking { case dense }

// Placeholder for OverlayCoordinate struct
struct OverlayCoordinate {
    let width: CGFloat?
    let height: CGFloat?
}

```

--------------------------------

### Initialize Grid with Identifiable Entities

Source: https://github.com/exyte/grid/blob/master/README.md

Initializes a Grid using a collection of identifiable entities. The library iterates through these entities and creates a view for each one, using the entity's properties to define grid content.

```swift
Grid(colorModels, tracks: 3) {
    ColorView($0)
}
```

--------------------------------

### SwiftUI Grid Packing: Sparse vs. Dense

Source: https://github.com/exyte/grid/blob/master/README.md

Illustrates the two grid packing strategies in SwiftUI: 'sparse' (default), which places items in order without filling holes, and 'dense', which attempts to fill holes with later, smaller items, potentially altering order.

```swift
import SwiftUI

struct PackingExample: View {
    @State var gridPacking = GridPacking.sparse

    var body: some View {
        VStack {
            // Assuming packingPicker is defined elsewhere
            // self.packingPicker

            Grid(tracks: 4) {
                ColorView(.red)
                
                ColorView(.black)
                    .gridSpan(column: 4)
                
                ColorView(.purple)
      
                ColorView(.orange)
                ColorView(.green)
            }
            .gridPacking(self.gridPacking)
            .gridAnimation(.default)
        }
    }
}

// Placeholder for GridPacking enum
enum GridPacking { case sparse, dense }
// Placeholder for Grid struct and modifiers
struct Grid<Content: View>: View {
    let tracks: Int
    let content: () -> Content

    init(tracks: Int, @ViewBuilder content: @escaping () -> Content) {
        self.tracks = tracks
        self.content = content
    }
    
    var body: some View {
        // Dummy implementation for compilation
        VStack {
            Text("Grid Placeholder")
        }
    }
    
    func gridPacking(_ packing: GridPacking) -> Self {
        return self
    }
    func gridAnimation(_ animation: GridAnimation) -> Self {
        return self
    }
}

// Placeholder for GridSpan modifier
struct GridSpanModifier: ViewModifier {
    var column: Int = 1
    func body(content: Content) -> some View {
        content
    }
}

struct GridSpan {
    var column: Int = 1
    var row: Int = 1
}

extension View {
    func gridSpan(column: Int = 1, row: Int = 1) -> some View {
        modifier(GridSpanModifier(column: column))
    }
}

// Placeholder for ColorView
struct ColorView: View {
    let color: Color
    init(_ color: Color) { self.color = color }
    var body: some View {
        Rectangle().fill(color)
    }
}

// Placeholder for GridAnimation enum
enum GridAnimation { case `default` }

```

--------------------------------

### Initialize Grid with Fixed-Sized Tracks

Source: https://github.com/exyte/grid/blob/master/README.md

Creates a Grid where each track has a fixed size defined in points. This allows for precise control over the dimensions of columns or rows in the grid layout.

```swift
Grid(tracks: [.pt(50), .pt(200), .pt(100)]) {
    ColorView(.blue)
    ColorView(.purple)
    ColorView(.red)
    ColorView(.cyan)
    ColorView(.green)
    ColorView(.orange)
}
```

--------------------------------

### Create GridGroup using ForEach

Source: https://github.com/exyte/grid/blob/master/README.md

Constructs a GridGroup by utilizing a ForEach loop over a collection of MathOperation items. This method is suitable for dynamically populating a GridGroup with views based on data.

```swift
var arithmeticButtons: GridGroup {
    let operations: [MathOperation] = \
        [.divide, .multiply, .substract, .add, .equal]
	
    return GridGroup {
        ForEach(operations, id: \.self) {
            CalcButton($0)
        }
    }
}
```

--------------------------------

### Create GridGroup from Collection with ID

Source: https://github.com/exyte/grid/blob/master/README.md

Initializes a GridGroup using a collection of MathOperation items, specifying \.self as the identifier key path. This ensures each button has a unique identity for potential animations.

```swift
var arithmeticButtons: GridGroup {
    let operations: [MathOperation] = \
        [.divide, .multiply, .substract, .add, .equal]
	
    return GridGroup(operations, id: \.self) {
        CalcButton($0)
    }
}
```

--------------------------------

### Flexible Sized Tracks with Fractional Units (.fr)

Source: https://github.com/exyte/grid/blob/master/README.md

Demonstrates using fractional units (.fr) for flexible track sizing in SwiftUI Grid. Fractional units distribute available space after fixed tracks are laid out. You can use decimal values for finer control over space distribution. An integer literal is a shorthand for repeating .fr(1) tracks.

```swift
Grid(tracks: [.pt(100), .fr(1), .fr(2.5)]) {
    ColorView(.blue)
    ColorView(.purple)
    ColorView(.red)
    ColorView(.cyan)
    ColorView(.green)
    ColorView(.orange)
}
```

```swift
Grid(tracks: 3) { ... }
```

```swift
Grid(tracks: [.fr(1), .fr(1), .fr(1)]) { ... }
```

--------------------------------

### Create GridGroup with Views

Source: https://github.com/exyte/grid/blob/master/README.md

Creates a GridGroup containing multiple CalcButton views. GridGroup is used to manage a collection of views within a grid, especially when exceeding the default limit or needing explicit identity.

```swift
var arithmeticButtons: GridGroup {
    GridGroup {
        CalcButton(.divide)
        CalcButton(.multiply)
        CalcButton(.substract)
        CalcButton(.equal)
    }
}
```

--------------------------------

### SwiftUI Grid Content Mode: Fill

Source: https://github.com/exyte/grid/blob/master/README.md

Demonstrates the '.fill' content mode for a SwiftUI Grid, where the grid attempts to occupy the entire parent view space. Growing tracks are implicitly given a flexible size.

```swift
import SwiftUI

struct ContentView: View {
    @State var contentMode: GridContentMode = .scroll

    var body: some View {
        VStack {
            // Assuming modesPicker is defined elsewhere
            // self.modesPicker
            
            Grid(models, id: \.self, tracks: 3) { model in
                VCardView(text: model.text, color: model.color)
                    .gridSpan(model.span)
            }
            .gridContentMode(self.contentMode)
            .gridFlow(.rows)
            .gridAnimation(.default)
        }
    }
}

// Placeholder for GridContentMode enum if not imported
enum GridContentMode { case scroll, fill }
// Placeholder for Grid struct and modifiers
struct Grid<Data, ID, Content>: View where Data: RandomAccessCollection, ID: Hashable, Content: View {
    let data: Data
    let id: KeyPath<Data.Element, ID>
    let tracks: Int
    let content: (Data.Element) -> Content

    init(_ data: Data, id: KeyPath<Data.Element, ID>, tracks: Int, @ViewBuilder content: @escaping (Data.Element) -> Content) {
        self.data = data
        self.id = id
        self.tracks = tracks
        self.content = content
    }
    
    var body: some View {
        // Dummy implementation for compilation
        VStack {
            Text("Grid Placeholder")
        }
    }
    
    func gridContentMode(_ mode: GridContentMode) -> Self {
        return self
    }
    func gridFlow(_ flow: GridFlow) -> Self {
        return self
    }
    func gridAnimation(_ animation: GridAnimation) -> Self {
        return self
    }
}

// Placeholder for GridSpan modifier
struct GridSpanModifier: ViewModifier {
    let span: GridSpan
    func body(content: Content) -> some View {
        content
    }
}

// Placeholder for GridSpan
struct GridSpan {
    var column: Int = 1
    var row: Int = 1
}

// Placeholder for GridFlow enum
enum GridFlow { case rows, columns }
// Placeholder for GridAnimation enum
enum GridAnimation { case fast, `default` }

// Placeholder for VCardView
struct VCardView: View {
    let text: String
    let color: Color
    var body: some View {
        Text(text).background(color)
    }
}

// Placeholder for sample data
struct ItemModel: Identifiable {
    let id = UUID()
    let text: String
    let color: Color
    var span = GridSpan()
}

let models = [ItemModel(text: "1", color: .red), ItemModel(text: "2", color: .blue), ItemModel(text: "3", color: .green)]

```

--------------------------------

### Initialize Grid with Explicit ID

Source: https://github.com/exyte/grid/blob/master/README.md

Initializes a Grid by providing a collection of models, an explicit ID key path, and the number of tracks. This allows for precise control over view identity within the grid, useful for animations.

```swift
Grid(colorModels, id: \.self, tracks: 3) {
    ColorView($0)
}
```

--------------------------------

### GridGroup with Specific Content Identifier

Source: https://github.com/exyte/grid/blob/master/README.md

Demonstrates adding a GridGroup to a Grid, where the GridGroup is initialized with a specific content identifier (MathOperation.clear) and a closure to create CalcButton views.

```swift
Grid {
...
    GridGroup(MathOperation.clear) {
        CalcButton($0)
    }
}
```

--------------------------------

### Using ForEach within Grid

Source: https://github.com/exyte/grid/blob/master/README.md

Demonstrates the use of SwiftUI's ForEach statement within a Grid's ViewBuilder closure to dynamically generate multiple grid items. Note that using ForEach without identifiable data may affect animation tracking.

```swift
Grid(tracks: 4) {
    ColorView(.red)
    ColorView(.purple)
    
    ForEach(0..<4) {
        ColorView(.black)
    }

    ColorView(.orange)
    ColorView(.green)
}
```

--------------------------------

### GridGroup with Collection and Explicit ID

Source: https://github.com/exyte/grid/blob/master/README.md

Initializes a GridGroup using a collection of MathOperation items and explicitly defining the identifier using a key path. This provides stable identifiers for views within the group.

```swift
var arithmeticButtons: GridGroup {
    let operations: [MathOperation] = \
        [.divide, .multiply, .substract, .add, .equal]
    return GridGroup(operations, id: \.self) { 
         CalcButton($0)
    }
}
```

--------------------------------

### SwiftUI Grid Caching with .gridCaching()

Source: https://github.com/exyte/grid/blob/master/README.md

Enables caching of grid layouts throughout the Grid's lifecycle. Supported on iOS only. Caching can be set in the constructor or via the .gridCaching() modifier, with the constructor taking precedence.

```swift
import SwiftUI

struct ContentView: View {
    var body: some View {
        Grid {
            // ... content
        }
        .gridCaching(true) // Enable caching
    }
}
```

--------------------------------

### SwiftUI Grid Item and Content Alignment

Source: https://github.com/exyte/grid/blob/master/README.md

Configures alignment for grid items and the overall grid content in SwiftUI. '.gridItemAlignment' sets alignment for individual items, '.gridCommonItemsAlignment' applies to all items unless overridden, and '.gridContentAlignment' aligns the grid within its available space.

```swift
import SwiftUI

struct SingleAlignmentExample: View {
  var body: some View {
    Grid(tracks: 3) {
      TextCardView(text: "Hello", color: .red)
        .gridItemAlignment(.leading)

      TextCardView(text: "world", color: .blue)
    }
    .gridCommonItemsAlignment(.center)
    .gridContentAlignment(.trailing)
  }
}

struct TextCardView: View {
  let text: String
  let color: Color
  var textColor: Color = .white

  var body: some View {
    Text(self.text)
      .foregroundColor(self.textColor)
      .padding(5)
      .gridCellBackground { _ in
        ColorView(self.color)
      }
      .gridCellOverlay { _ in
        RoundedRectangle(cornerRadius: 5)
          .strokeBorder(self.color.darker(),
                        lineWidth: 3)
      }
  }
}

// Placeholder for Grid struct and modifiers
struct Grid<Content: View>: View {
    let tracks: Int
    let content: () -> Content

    init(tracks: Int, @ViewBuilder content: @escaping () -> Content) {
        self.tracks = tracks
        self.content = content
    }
    
    var body: some View {
        // Dummy implementation for compilation
        VStack {
            Text("Grid Placeholder")
        }
    }
    
    func gridItemAlignment(_ alignment: GridItemAlignment) -> Self {
        return self
    }
    func gridCommonItemsAlignment(_ alignment: GridItemAlignment) -> Self {
        return self
    }
    func gridContentAlignment(_ alignment: GridContentAlignment) -> Self {
        return self
    }
}

// Placeholder for GridItemAlignment enum
enum GridItemAlignment { case leading, center, trailing }
// Placeholder for GridContentAlignment enum
enum GridContentAlignment { case leading, center, trailing }

// Placeholder for ColorView
struct ColorView: View {
    let color: Color
    init(_ color: Color) { self.color = color }
    var body: some View {
        Rectangle().fill(color)
    }
}

// Extension to provide a darker color for stroke
extension Color {
    func darker(_ amount: CGFloat = 0.1) -> Color {
        // Dummy implementation for compilation
        return self
    }
    // Placeholder for gridCellBackground modifier
    func gridCellBackground<OverlayContent: View>(@ViewBuilder _ background: @escaping (OverlayCoordinate?) -> OverlayContent) -> some View {
        self // Dummy implementation
    }
    // Placeholder for gridCellOverlay modifier
    func gridCellOverlay<OverlayContent: View>(@ViewBuilder _ overlay: @escaping (OverlayCoordinate?) -> OverlayContent) -> some View {
        self // Dummy implementation
    }
}

// Placeholder for gridItemAlignment modifier
struct GridItemAlignmentModifier: ViewModifier {
    let alignment: GridItemAlignment
    func body(content: Content) -> some View {
        content
    }
}

// Placeholder for gridCommonItemsAlignment modifier
struct GridCommonItemsAlignmentModifier: ViewModifier {
    let alignment: GridItemAlignment
    func body(content: Content) -> some View {
        content
    }
}

// Placeholder for gridContentAlignment modifier
struct GridContentAlignmentModifier: ViewModifier {
    let alignment: GridContentAlignment
    func body(content: Content) -> some View {
        content
    }
}

// Extending View to apply modifiers
extension View {
    func gridItemAlignment(_ alignment: GridItemAlignment) -> some View {
        modifier(GridItemAlignmentModifier(alignment: alignment))
    }
    func gridCommonItemsAlignment(_ alignment: GridItemAlignment) -> some View {
        modifier(GridCommonItemsAlignmentModifier(alignment: alignment))
    }
    func gridContentAlignment(_ alignment: GridContentAlignment) -> some View {
        modifier(GridContentAlignmentModifier(alignment: alignment))
    }
}

// Placeholder for OverlayCoordinate struct
struct OverlayCoordinate {
    let width: CGFloat?
    let height: CGFloat?
}

```

--------------------------------

### SwiftUI @GridBuilder for Conditional Views

Source: https://github.com/exyte/grid/blob/master/README.md

Utilizes the @GridBuilder function builder to conditionally return different SwiftUI views within Grid or GridGroup bodies. This allows for dynamic view construction based on state or logic.

```swift
import SwiftUI

struct ContentView: View {
    var body: some View {
        Grid {
            headerSegment(flag: true)
        }
    }

    @GridBuilder
    func headerSegment(flag: Bool) -> some View {
        if flag {
            return GridGroup {
                Text("Conditional Content")
            }
        } else {
            return ColorView(.black)
        }
    }
}

struct ColorView: View {
    let color: Color
    var body: some View {
        color
    }
}
```

--------------------------------

### SwiftUI Grid Animation with .gridAnimation()

Source: https://github.com/exyte/grid/blob/master/README.md

Applies a specific animation to the inner ZStack of a Grid. Requires explicit IDs for views to ensure correct animation transitions, especially when using ForEach or GridGroup with Identifiable models.

```swift
import SwiftUI

struct ContentView: View {
    var body: some View {
        Grid {
            ForEach(0..<10) {
                Text("Item \($0)")
                    .gridCell(id: $0)
            }
        }
        .gridAnimation(.default)
    }
}
```

--------------------------------

### Swift Grid Content Mode: Scroll (Rows Flow)

Source: https://github.com/exyte/grid/blob/master/README.md

Shows how to set the grid content mode to .scroll for a grid with rows flow. It includes a custom `VCardView` and demonstrates how to apply the modifier and other grid properties like `gridPacking` and `gridSpan`.

```swift
struct VCardView: View {
    let text: String
    let color: UIColor
    
    var body: some View {
        VStack {
            Image("dog")
                .resizable()
                .aspectRatio(contentMode: .fit)
                .cornerRadius(5)
                .frame(minWidth: 100, minHeight: 50)
            
            Text(self.text)
                .layoutPriority(.greatestFiniteMagnitude)
        }
        .padding(5)
        .gridCellBackground { _ in
            ColorView(self.color)
        }
        .gridCellOverlay { _ in
            RoundedRectangle(cornerRadius: 5)
                .strokeBorder(Color(self.color.darker()),
                              lineWidth: 3)
        }
    }
}

struct ContentView: View {
    var body: some View {
        Grid(tracks: 3) {
            ForEach(0..<40) {
                VCardView(text: randomText(), color: .random)
                    .gridSpan(column: self.randomSpan)
            }
        }
        .gridContentMode(.scroll)
        .gridPacking(.dense)
        .gridFlow(.rows)
    }
    
    var randomSpan: Int {
        Int(arc4random_uniform(3)) + 1
    }
}
```

--------------------------------

### Spanning Grid Cells Across Tracks

Source: https://github.com/exyte/grid/blob/master/README.md

Illustrates how to make grid items span across multiple columns or rows using the .gridSpan modifier. This is useful for creating more complex layouts where a single item occupies more than one cell. The span value defaults to 1 if not specified.

```swift
Grid(tracks: [.fr(1), .pt(150), .fr(2)]) {
    ColorView(.blue)
        .gridSpan(column: 2)
    ColorView(.purple)
        .gridSpan(row: 2)
    ColorView(.red)
    ColorView(.cyan)
    ColorView(.green)
        .gridSpan(column: 2, row: 3)
    ColorView(.orange)
    ColorView(.magenta)
        .gridSpan(row: 2)
}
```

```swift
var body: some View {
    Grid(tracks: [.fr(1), .fit, .fit], spacing: 10) {
        VCardView(text: placeholderText(),
                  color: .red)
        
        VCardView(text: placeholderText(length: 30),
                  color: .orange)
            .frame(maxWidth: 70)
        
        VCardView(text: placeholderText(length: 120),
                  color: .green)
            .frame(maxWidth: 100)
            .gridSpan(column: 1, row: 2)
        
        VCardView(text: placeholderText(length: 160),
                  color: .magenta)
            .gridSpan(column: 2, row: 1)
        
        VCardView(text: placeholderText(length: 190),
                  color: .cyan)
            .gridSpan(column: 3, row: 1)
    }
}
```

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