added project 03 dicee

posts/03_dicee.md

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+---
+title: "Flutter Dicee Project Study Guide"
+tags:
+  - project-03
+---
+
+# Flutter Dicee Project Study Guide
+
+## Project Overview
+This project creates a dice rolling app using Flutter. It demonstrates key concepts in Flutter development, including stateful widgets, random number generation, and interactive UI elements.
+
+## Key Components
+
+### 1. Main Dart File (main.dart)
+
+#### Entry Point
+```dart
+void main() {
+  return runApp(
+    MaterialApp(
+      // ...
+    ),
+  );
+}
+```
+- The `main()` function is the entry point of the Flutter app.
+- `runApp()` takes the root widget of the app as an argument.
+
+#### App Structure
+```dart
+MaterialApp(
+  home: Scaffold(
+    backgroundColor: Colors.red,
+    appBar: AppBar(
+      // ...
+    ),
+    body: DicePage(),
+  ),
+)
+```
+- `MaterialApp` provides the base structure for the app.
+- `Scaffold` implements the basic material design layout.
+- `AppBar` creates a custom app bar with a title and bottom border.
+- `DicePage` is the main content of the app.
+
+### 2. Widget Tree
+
+To include the widget tree diagram in your markdown notes, use the following code block:
+
+```mermaid
+graph TD
+    A[MaterialApp] --> B[Scaffold]
+    B --> C[AppBar]
+    B --> D[DicePage Stateful Widget]
+    D --> E[Center]
+    E --> F[Row]
+    F --> G[Expanded Left]
+    F --> H[Expanded Right]
+    G --> I[TextButton Left]
+    H --> J[TextButton Right]
+    I --> K[Image.asset Left]
+    J --> L[Image.asset Right]
+```
+
+### 3. Key Widgets and Their Purposes
+
+1. **MaterialApp**: Provides default theme and navigation structure.
+2. **Scaffold**: Implements the basic material design layout.
+3. **AppBar**: Creates a custom app bar for the app.
+4. **DicePage (StatefulWidget)**: The main content widget that can update its state.
+5. **Center**: Centers its child within itself.
+6. **Row**: Arranges its children horizontally.
+7. **Expanded**: Expands a child of a Row, Column, or Flex.
+8. **TextButton**: A Material Design text button.
+9. **Image.asset**: Displays an image from the app's assets.
+
+### 4. Stateful Widget Implementation
+
+```dart
+class DicePage extends StatefulWidget {
+  @override
+  State<DicePage> createState() => _DicePageState();
+}
+
+class _DicePageState extends State<DicePage> {
+  int leftDiceNumber = 1;
+  int rightDiceNumber = 1;
+
+  void rollDice() {
+    setState(() {
+      leftDiceNumber = Random().nextInt(6) + 1;
+      rightDiceNumber = Random().nextInt(6) + 1;
+    });
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    // ... widget tree
+  }
+}
+```
+- `DicePage` is a `StatefulWidget` that creates and manages a `_DicePageState`.
+- `_DicePageState` contains the mutable state and the `build` method.
+- `rollDice()` method updates the state using `setState()`.
+
+### 5. Interactivity and State Management
+
+- `TextButton` widgets are used to make the dice images tappable.
+- `onPressed` property of `TextButton` is set to call `rollDice()`.
+- `setState()` is used to update the UI when dice values change.
+
+### 6. Asset Management
+
+In `pubspec.yaml`:
+```yaml
+flutter:
+  assets:
+    - images/
+```
+This allows the use of `Image.asset('images/dice$diceNumber.png')` in the code.
+
+## Learning Outcomes
+
+1. Creating and using Stateful Widgets
+2. Implementing interactivity with `TextButton`
+3. Managing app state with `setState()`
+4. Using `Random()` for generating random numbers
+5. Structuring a Flutter app with `MaterialApp` and `Scaffold`
+6. Using `Row` and `Expanded` for layout
+7. Loading and displaying images from assets
+8. String interpolation in Dart (`'images/dice$diceNumber.png'`)
+
+## Exercises to Reinforce Learning
+
+1. Add a "Roll Both" button that changes both dice at once.
+2. Implement a score counter that increments based on the dice values.
+3. Add animations to the dice when they change.
+4. Create a custom app theme and apply it to the entire app.
+5. Implement a "lock" feature for each die, allowing the user to keep one die's value while rolling the other.
+
+## Finished App
+
+![Finished App](https://github.com/londonappbrewery/Images/blob/master/dicee-demo.gif)
+
+## Additional Resources
+
+- [Flutter Documentation](https://flutter.dev/docs)
+- [Dart Language Tour](https://dart.dev/guides/language/language-tour)
+- [Flutter State Management](https://flutter.dev/docs/development/data-and-backend/state-mgmt/intro)
+
+Remember to refer to the README.md file for the project goals and additional learning points!