GUI Integration and Event Loops

def enable_gui(gui=None):
    """
    Enable GUI event loop integration for the specified toolkit.
    
    Enables interactive use of GUI libraries like matplotlib, Qt widgets,
    and other GUI frameworks within Jupyter environments.
    
    Parameters:
    - gui (str, optional): GUI toolkit to enable
                          Options: 'qt4', 'qt5', 'qt', 'gtk', 'gtk3', 
                                  'wx', 'tk', 'cocoa', 'asyncio', 'osx'
                          If None, tries to auto-detect
    
    Returns:
    None
    
    Raises:
    ImportError: If specified GUI toolkit is not available
    ValueError: If gui parameter is invalid
    """

def register_integration(gui):
    """
    Decorator for registering GUI integration functions.
    
    Used to register custom event loop integration functions
    for specific GUI toolkits.
    
    Parameters:
    - gui (str): Name of the GUI toolkit
    
    Returns:
    function: Decorator function
    
    Example:
    @register_integration('custom_gui')
    def loop_custom_gui(kernel):
        # Custom integration logic
        pass
    """

def loop_qt4(kernel):
    """
    Start Qt4 event loop integration.
    
    Parameters:
    - kernel: Kernel instance for integration
    """

def loop_qt5(kernel):
    """
    Start Qt5 event loop integration.
    
    Parameters:
    - kernel: Kernel instance for integration
    """

def loop_gtk(kernel):
    """
    Start GTK2 event loop integration.
    
    Parameters:
    - kernel: Kernel instance for integration
    """

def loop_gtk3(kernel):
    """
    Start GTK3 event loop integration.
    
    Parameters:
    - kernel: Kernel instance for integration
    """

def loop_wx(kernel):
    """
    Start wxPython event loop integration.
    
    Parameters:
    - kernel: Kernel instance for integration
    """

def loop_tk(kernel):
    """
    Start Tkinter event loop integration.
    
    Parameters:
    - kernel: Kernel instance for integration
    """

def loop_cocoa(kernel):
    """
    Start Cocoa event loop integration (macOS).
    
    Parameters:
    - kernel: Kernel instance for integration
    """

def loop_asyncio(kernel):
    """
    Start asyncio event loop integration.
    
    Parameters:
    - kernel: Kernel instance for integration
    """

from ipykernel.eventloops import enable_gui

# Enable Qt5 for matplotlib and other Qt applications
enable_gui('qt5')

# Now matplotlib plots will be interactive
import matplotlib.pyplot as plt
plt.ion()  # Enable interactive mode

# Create interactive plot
fig, ax = plt.subplots()
ax.plot([1, 2, 3, 4], [1, 4, 2, 3])
plt.show()  # Window stays responsive

from ipykernel.eventloops import enable_gui

# Let ipykernel detect the best available GUI toolkit
enable_gui()

# Use GUI libraries normally
import matplotlib.pyplot as plt
plt.plot([1, 2, 3], [1, 4, 2])
plt.show()

from ipykernel.eventloops import enable_gui

# Enable Qt5 integration
enable_gui('qt5')

# Now you can create Qt widgets interactively
try:
    from PyQt5.QtWidgets import QApplication, QWidget, QPushButton, QVBoxLayout
    
    app = QApplication.instance() or QApplication([])
    
    # Create a simple Qt widget
    widget = QWidget()
    widget.setWindowTitle('Interactive Qt Widget')
    
    layout = QVBoxLayout()
    button = QPushButton('Click me!')
    button.clicked.connect(lambda: print('Button clicked!'))
    layout.addWidget(button)
    
    widget.setLayout(layout)
    widget.show()
    
    print("Qt widget created and shown")
    
except ImportError:
    print("PyQt5 not available")

from ipykernel.eventloops import enable_gui
import tkinter as tk

# Enable Tkinter integration
enable_gui('tk')

# Create Tkinter application
root = tk.Tk()
root.title('Interactive Tkinter App')

# Add widgets
label = tk.Label(root, text='Hello from Tkinter!')
label.pack(pady=10)

button = tk.Button(root, text='Print Message', 
                  command=lambda: print('Tkinter button pressed!'))
button.pack(pady=5)

# Show window - will remain responsive
root.mainloop()

from ipykernel.eventloops import enable_gui
import matplotlib
import matplotlib.pyplot as plt

# Try different GUI backends
gui_backends = [
    ('qt5', 'Qt5Agg'),
    ('tk', 'TkAgg'),
    ('gtk3', 'Gtk3Agg')
]

for gui, backend in gui_backends:
    try:
        # Set matplotlib backend
        matplotlib.use(backend)
        
        # Enable GUI integration
        enable_gui(gui)
        
        # Create plot
        plt.figure(figsize=(6, 4))
        plt.plot([1, 2, 3, 4], [1, 4, 2, 3], 'o-')
        plt.title(f'Interactive plot with {backend}')
        plt.show()
        
        print(f"Successfully enabled {gui} with {backend}")
        break
        
    except (ImportError, ValueError) as e:
        print(f"Failed to enable {gui}: {e}")
        continue

from ipykernel.eventloops import register_integration, enable_gui

@register_integration('custom')
def loop_custom(kernel):
    """Custom GUI integration example."""
    print("Starting custom GUI integration")
    
    # Custom event loop logic here
    # This would typically involve:
    # 1. Setting up the GUI toolkit's event loop
    # 2. Integrating with kernel's execution model
    # 3. Handling GUI events without blocking kernel
    
    def custom_event_handler():
        # Handle custom GUI events
        print("Custom GUI event processed")
    
    # Register event handler with kernel
    # (Implementation depends on specific GUI toolkit)
    
    print("Custom GUI integration active")

# Enable custom integration
enable_gui('custom')

from ipykernel.eventloops import enable_gui
import sys

def setup_gui_for_platform():
    """Enable appropriate GUI for current platform."""
    
    if sys.platform == 'darwin':  # macOS
        try:
            enable_gui('cocoa')
            print("Enabled Cocoa GUI for macOS")
        except:
            try:
                enable_gui('qt5')
                print("Enabled Qt5 GUI as fallback")
            except:
                print("No GUI backend available")
                
    elif sys.platform == 'win32':  # Windows
        try:
            enable_gui('qt5')
            print("Enabled Qt5 GUI for Windows")
        except:
            try:
                enable_gui('tk')
                print("Enabled Tkinter GUI as fallback")
            except:
                print("No GUI backend available")
                
    else:  # Linux and others
        gui_options = ['qt5', 'gtk3', 'tk']
        for gui in gui_options:
            try:
                enable_gui(gui)
                print(f"Enabled {gui} GUI for Linux")
                break
            except:
                continue
        else:
            print("No GUI backend available")

# Setup GUI for current platform
setup_gui_for_platform()

from ipykernel.eventloops import enable_gui
import matplotlib.pyplot as plt
import matplotlib.animation as animation
import numpy as np

# Enable GUI for interactive plots
enable_gui('qt5')

# Create animated plot
fig, ax = plt.subplots()
x = np.linspace(0, 2*np.pi, 100)
line, = ax.plot(x, np.sin(x))

def animate(frame):
    """Animation function."""
    line.set_ydata(np.sin(x + frame/10.0))
    return line,

# Create animation
anim = animation.FuncAnimation(fig, animate, frames=200, 
                             interval=50, blit=True, repeat=True)

plt.title('Animated Sine Wave')
plt.show()

print("Animation running - window should remain responsive")