yiking/main.py

"""
Here’s a detailed prompt you can use to generate the same GUI code anew using a language model:

---

**Prompt:**

"I need a Python program to create a Tkinter-based GUI named 'Yiking'. The GUI will control parameters for an OpenCV image processing program. The program must be split into two files:

1. **`process.py`**: Contains a `process_frame` function that takes parameters as input, performs OpenCV operations (not implemented in this request), and returns an image as a NumPy array and a result string.

2. **`gui.py`**: Implements the GUI and integrates with `process.py`. Here are the detailed requirements:

### GUI Details:
- **Window Title**: 'Yiking'
- **Layout**:
  - **Row 1**: Two columns
    - Left column: Group of sliders for controlling parameters.
    - Right column: A canvas for displaying a processed image (1024x768 pixels).
  - **Row 2**: Two columns
    - Left column: A "Run" button.
    - Right column: A text box for displaying results or error messages.
- **Widgets**:
  - Sliders with corresponding min, max, and default values:
    - `minDist` = (0, 500, 100)
    - `param1` = (0, 500, 30)
    - `param2` = (0, 400, 25)
    - `minRadius` = (0, 100, 5)
    - `maxRadius` = (0, 1000, 1000)
    - `color1_R_min` = (0, 64, 5)
    - `color1_V_min` = (0, 64, 5)
    - `color1_B_min` = (0, 64, 5)
    - `color1_R_min` = (0, 64, 5)
    - `color1_V_min` = (0, 64, 5)
    - `color1_B_min` = (0, 64, 5)
  - Sliders must snap to increments of 5 and synchronize with a text entry box.
  - The image canvas must resize input images to fit within 1024x768 while maintaining aspect ratio.
  - A "Run" button executes the `process_frame` function with the current slider values.
  - If an exception occurs in `process_frame`, it should display the error in the result text box and clear the canvas.

### Key Features:
- Use the `Pillow` library (`PIL`) to handle image conversion and resizing.
- Catch exceptions in `run_process` to display error messages.
- Keep the GUI responsive and visually clean.

### Output:
Please provide a fully functional `gui.py` implementation meeting these requirements. Include imports, class structure, and the `__main__` block. Do not implement the OpenCV functionality within `process.py`—assume it exists for integration purposes."

---

This prompt is designed to give the LLM everything it needs to generate the desired `gui.py` code. Let me know if you'd like to adjust it further!
"""
import tkinter as tk
from tkinter import ttk
from process import process_frame
from PIL import Image, ImageTk  # Required for displaying images
import cv2  # OpenCV for numpy array to image conversion

class OpenCVInterface:
    def __init__(self, root):
        self.root = root
        self.root.title("Yiking")

        # Variables for sliders with min, max, and default values
        self.variables_config = {
            "minDist": (0, 500, 100),
            "param1": (0, 500, 30),
            "param2": (0, 400, 25),
            "minRadius": (0, 100, 5),
            "maxRadius": (0, 1000, 1000),
            "color1_R_min": (0, 64, 5),
            "color1_R_max": (0, 64, 5),
            "color1_V_min": (0, 64, 5),
            "color1_V_max": (0, 64, 5),
            "color1_B_min": (0, 64, 5),
            "color1_B_max": (0, 64, 5),
        }

        self.variables = {
            name: tk.IntVar(value=config[2]) for name, config in self.variables_config.items()
        }

        # GUI Layout
        self.setup_gui()

    def setup_gui(self):
        # Root grid layout
        self.root.rowconfigure(1, weight=1)
        self.root.columnconfigure(0, weight=1)
        self.root.columnconfigure(1, weight=1)

        # Dropdown for camera selection
        camera_frame = ttk.Frame(self.root)
        camera_frame.grid(row=0, column=0, sticky="nsew")
        self.camera_selection = tk.StringVar()
        self.camera_dropdown = ttk.Combobox(camera_frame, textvariable=self.camera_selection)
        self.camera_dropdown.grid(row=0, column=0, padx=5, pady=5)
        self.populate_camera_dropdown()

        # Left Column: Sliders
        left_frame = ttk.Frame(self.root)
        left_frame.grid(row=1, column=0, sticky="nswe")

        for var_name, var in self.variables.items():
            min_val, max_val, _ = self.variables_config[var_name]
            self.create_slider(left_frame, var_name, var, min_val, max_val)

        # Right Column: Image Placeholder
        self.image_canvas = tk.Canvas(self.root, bg="gray", width=1024, height=768)
        self.image_canvas.grid(row=0, column=1, rowspan=2, sticky="nswe")

        # Bottom Row: Run Button and Result
        run_button = ttk.Button(self.root, text="Run", command=self.run_process)
        run_button.grid(row=2, column=0, sticky="we")

        self.result_text = tk.Text(self.root, height=5, width=40)
        self.result_text.grid(row=2, column=1, sticky="nswe")

    def populate_camera_dropdown(self):
        # Detect connected cameras using OpenCV
        cameras = []
        for i in range(5):  # Check first 5 indexes for cameras
            cap = cv2.VideoCapture(i)
            if cap.read()[0]:
                cameras.append(f"Camera {i}")
                cap.release()
        self.camera_dropdown["values"] = cameras
        if cameras:
            self.camera_dropdown.current(0)

    def create_slider(self, parent, name, variable, min_val, max_val):
        frame = ttk.Frame(parent)
        frame.pack(fill="x", padx=5, pady=2)

        # Label
        label = ttk.Label(frame, text=name)
        label.pack(side="left")

        def on_slide(value):
            # Round value to nearest multiple of 5
            rounded_value = round(float(value) / 5) * 5
            variable.set(int(rounded_value))  # Update the variable with the rounded value

        # Slider
        slider = ttk.Scale(
            frame, from_=min_val, to=max_val,
            variable=variable, orient="horizontal", command=on_slide
        )
        slider.pack(side="left", fill="x", expand=True, padx=5)

        # Entry box
        entry = ttk.Entry(frame, textvariable=variable, width=5)
        entry.pack(side="left")

    def run_process(self):
        # Collect slider values
        parameters = {key: var.get() for key, var in self.variables.items()}

        try:
            # Get selected camera ID
            cam_id = int(self.camera_selection.get().split()[-1])

            # Call process function
            image, result_text = process_frame(parameters, cam_id=cam_id)

            # Convert OpenCV image (numpy array) to PIL Image for Tkinter display
            if image is not None:
                image = cv2.cvtColor(image, cv2.COLOR_BGR2RGB)  # Convert BGR to RGB
                pil_image = Image.fromarray(image)  # Convert numpy array to PIL Image

                # Rescale image to fit within 1024x768 while preserving aspect ratio
                max_width, max_height = 1024, 768
                original_width, original_height = pil_image.size
                aspect_ratio = min(max_width / original_width, max_height / original_height)
                new_width = int(original_width * aspect_ratio)
                new_height = int(original_height * aspect_ratio)
                pil_image = pil_image.resize((new_width, new_height), Image.Resampling.LANCZOS)

                tk_image = ImageTk.PhotoImage(pil_image)  # Convert PIL Image to Tkinter Image

                # Clear canvas and display the image
                self.image_canvas.delete("all")
                self.image_canvas.create_image(512, 384, image=tk_image, anchor="center")
                self.image_canvas.image = tk_image  # Keep a reference to prevent garbage collection

            # Update result text
            self.result_text.delete(1.0, tk.END)
            self.result_text.insert(tk.END, result_text)
        except Exception as exc:
            # Handle and display exceptions
            self.result_text.delete(1.0, tk.END)
            self.result_text.insert(tk.END, str(exc))
            self.image_canvas.delete("all")

if __name__ == "__main__":
    root = tk.Tk()
    app = OpenCVInterface(root)
    root.mainloop()