### Start the X Event Loop

Source: https://context7.com/burntsushi/xgbutil/llms.txt

Enters the main event loop to process X events. This should typically be the last call in a xgbutil application.

```go
xevent.Main(X)
```

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

### Run Main Event Loop

Source: https://context7.com/burntsushi/xgbutil/llms.txt

Starts the primary event loop to dispatch X events, with an alternative for integrating multiple event sources.

```go
package main

import (
    "log"

    "github.com/BurntSushi/xgbutil"
    "github.com/BurntSushi/xgbutil/keybind"
    "github.com/BurntSushi/xgbutil/xevent"
)

func main() {
    X, err := xgbutil.NewConn()
    if err != nil {
        log.Fatal(err)
    }

    keybind.Initialize(X)

    // Simple event loop
    log.Println("Starting event loop...")
    xevent.Main(X)

    // Alternative: MainPing for multiple event sources
    // pingBefore, pingAfter, pingQuit := xevent.MainPing(X)
    // for {
    //     select {
    //     case <-pingBefore:
    //         <-pingAfter // Wait for event processing
    //     case val := <-someOtherChannel:
    //         // Handle other events
    //     case <-pingQuit:
    //         return
    //     }
    // }
}
```

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

### Implement Dragging for Window Moving

Source: https://context7.com/burntsushi/xgbutil/llms.txt

Sets up a drag handler for window moving using a modifier key and mouse button. It includes callbacks for the start, step, and end of the drag operation.

```go
mousebind.Drag(X, win.Id, win.Id, "Mod4-1", true,
        // Begin: called when drag starts
        func(X *xgbutil.XUtil, rootX, rootY, eventX, eventY int) (bool, xproto.Cursor) {
            startX, startY = rootX, rootY
            return true, 0 // true = proceed with drag, 0 = default cursor
        },
        // Step: called on each mouse movement
        func(X *xgbutil.XUtil, rootX, rootY, eventX, eventY int) {
            dx, dy := rootX-startX, rootY-startY
            log.Printf("Dragging: delta (%d, %d)", dx, dy)
        },
        // End: called when drag ends
        func(X *xgbutil.XUtil, rootX, rootY, eventX, eventY int) {
            log.Println("Drag ended")
        },
    )
```

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

### Manipulate X Window Properties with xprop

Source: https://context7.com/burntsushi/xgbutil/llms.txt

Use `xprop` functions to set and get string and numeric properties on X windows. Ensure you have a connection to the X server and a valid window ID.

```go
package main

import (
    "log"

    "github.com/BurntSushi/xgb/xproto"

    "github.com/BurntSushi/xgbutil"
    "github.com/BurntSushi/xgbutil/xprop"
    "github.com/BurntSushi/xgbutil/xwindow"
)

func main() {
    X, err := xgbutil.NewConn()
    if err != nil {
        log.Fatal(err)
    }

    win, _ := xwindow.Generate(X)
    win.Create(X.RootWin(), 0, 0, 200, 200, xproto.CwBackPixel, 0xffffff)

    // Set string property (8-bit format)
    xprop.ChangeProp(X, win.Id, 8, "MY_CUSTOM_PROP", "STRING", []byte("Hello World"))

    // Set 32-bit property (cardinal numbers)
    xprop.ChangeProp32(X, win.Id, "MY_NUMBER_PROP", "CARDINAL", 42, 100, 200)

    // Get string property
    reply, err := xprop.GetProperty(X, win.Id, "MY_CUSTOM_PROP")
    if err == nil {
        str, _ := xprop.PropValStr(reply, nil)
        log.Printf("String property: %s", str)
    }

    // Get numeric property
    reply, err = xprop.GetProperty(X, win.Id, "MY_NUMBER_PROP")
    if err == nil {
        nums, _ := xprop.PropValNums(reply, nil)
        log.Printf("Number properties: %v", nums)
    }

    // Get/create atoms
    atom, err := xprop.Atom(X, "MY_ATOM", false) // false = create if not exists
    if err == nil {
        log.Printf("Atom ID: %d", atom)
    }

    // Get atom name from ID
    atomName, _ := xprop.AtomName(X, atom)
    log.Printf("Atom name: %s", atomName)

    // Shorthand for getting atom (with caching)
    myAtom, _ := xprop.Atm(X, "ANOTHER_ATOM")
    log.Printf("Another atom: %d", myAtom)

    win.Map()
}
```

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

### Get Window Geometry

Source: https://context7.com/burntsushi/xgbutil/llms.txt

Retrieves the current position and dimensions of a window.

```go
geom, _ := win.Geometry()
```

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

### Initialize and Use Keyboard Bindings in Go

Source: https://context7.com/burntsushi/xgbutil/llms.txt

Demonstrates parsing key strings, converting between keycodes and keysyms, and performing keyboard grabs using the xgbutil library.

```go
package main

import (
    "log"

    "github.com/BurntSushi/xgbutil"
    "github.com/BurntSushi/xgbutil/keybind"
    "github.com/BurntSushi/xgbutil/xevent"
)

func main() {
    X, err := xgbutil.NewConn()
    if err != nil {
        log.Fatal(err)
    }

    keybind.Initialize(X)

    // Parse key string to modifiers and keycodes
    mods, keycodes, err := keybind.ParseString(X, "Control-Shift-a")
    if err != nil {
        log.Fatal(err)
    }
    log.Printf("Modifiers: %d, Keycodes: %v", mods, keycodes)

    // Convert key name to keycodes
    codes := keybind.StrToKeycodes(X, "Return")
    log.Printf("Return keycodes: %v", codes)

    // Get keysym from keycode
    keymap := keybind.KeyMapGet(X)
    if len(codes) > 0 {
        keysym := keybind.KeysymGet(X, codes[0], 0) // column 0 = unshifted
        log.Printf("Keysym for Return: 0x%x", keysym)

        // Convert keysym back to string
        symStr := keybind.KeysymToStr(keysym)
        log.Printf("Keysym string: %s", symStr)
    }
    log.Printf("Keysyms per keycode: %d", keymap.KeysymsPerKeycode)

    // Grab entire keyboard (all keys go to this window)
    err = keybind.GrabKeyboard(X, X.RootWin())
    if err != nil {
        log.Printf("Could not grab keyboard: %v", err)
    } else {
        log.Println("Keyboard grabbed!")
        // Release keyboard grab
        keybind.UngrabKeyboard(X)
    }

    // Smart grab (with key event redirection)
    // keybind.SmartGrab(X, X.RootWin())
    // keybind.SmartUngrab(X)

    // Grab single key
    // keybind.Grab(X, X.RootWin(), mods, codes[0])
    // keybind.Ungrab(X, X.RootWin(), mods, codes[0])

    xevent.Main(X)
}
```

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

### Initialize XGButil Connection

Source: https://context7.com/burntsushi/xgbutil/llms.txt

Establishes a connection to the X server. Handles potential connection errors.

```go
X, err := xgbutil.NewConn()
    if err != nil {
        log.Fatal(err)
    }
```

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

### Create a Window with Basic Properties

Source: https://context7.com/burntsushi/xgbutil/llms.txt

Creates a window with specified position, dimensions, background color, and event mask. Note: This version does not return an error.

```go
win, _ := xwindow.Generate(X)
    win.Create(X.RootWin(), 100, 100, 300, 200,
        xproto.CwBackPixel|xproto.CwEventMask,
        0x00ff00, xproto.EventMaskButtonRelease)
    win.Map()
```

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

### Initialize Mouse Binding System

Source: https://context7.com/burntsushi/xgbutil/llms.txt

Initializes the mouse binding system for the given X connection.

```go
mousebind.Initialize(X)
```

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

### Interact with EWMH window manager hints in Go

Source: https://context7.com/burntsushi/xgbutil/llms.txt

Demonstrates retrieving window lists, active window status, and setting EWMH properties like window names and types.

```go
package main

import (
    "log"

    "github.com/BurntSushi/xgb/xproto"

    "github.com/BurntSushi/xgbutil"
    "github.com/BurntSushi/xgbutil/ewmh"
    "github.com/BurntSushi/xgbutil/xwindow"
)

func main() {
    X, err := xgbutil.NewConn()
    if err != nil {
        log.Fatal(err)
    }

    // Get list of all client windows
    clients, err := ewmh.ClientListGet(X)
    if err != nil {
        log.Printf("Could not get client list: %v", err)
    } else {
        for _, client := range clients {
            name, _ := ewmh.WmNameGet(X, client)
            log.Printf("Window 0x%x: %s", client, name)
        }
    }

    // Get current active window
    active, err := ewmh.ActiveWindowGet(X)
    if err == nil {
        name, _ := ewmh.WmNameGet(X, active)
        log.Printf("Active window: %s", name)
    }

    // Get number of desktops
    numDesks, _ := ewmh.NumberOfDesktopsGet(X)
    log.Printf("Number of desktops: %d", numDesks)

    // Get current desktop
    currentDesk, _ := ewmh.CurrentDesktopGet(X)
    log.Printf("Current desktop: %d", currentDesk)

    // Create a window and set EWMH properties
    win, _ := xwindow.Generate(X)
    win.Create(X.RootWin(), 0, 0, 400, 300, xproto.CwBackPixel, 0x00ff00)

    // Set window name
    ewmh.WmNameSet(X, win.Id, "My EWMH Window")

    // Set window type (normal, dialog, dock, etc.)
    ewmh.WmWindowTypeSet(X, win.Id, []string{"_NET_WM_WINDOW_TYPE_NORMAL"})

    // Request to make window fullscreen
    // ewmh.WmStateReq(X, win.Id, ewmh.StateAdd, "_NET_WM_STATE_FULLSCREEN")

    // Request focus (polite way via window manager)
    win.Map()
    ewmh.ActiveWindowReq(X, win.Id)

    // Move/resize via window manager
    ewmh.MoveresizeWindow(X, win.Id, 100, 100, 500, 400)

    // Close window gracefully via window manager
    // ewmh.CloseWindow(X, win.Id)
}
```

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

### Establish X Server Connection

Source: https://context7.com/burntsushi/xgbutil/llms.txt

Connects to the X server using the DISPLAY environment variable or a custom display string.

```go
package main

import (
    "log"

    "github.com/BurntSushi/xgbutil"
)

func main() {
    // Connect to X server using DISPLAY environment variable
    X, err := xgbutil.NewConn()
    if err != nil {
        log.Fatalf("Could not connect to X server: %v", err)
    }

    // Access connection info
    log.Printf("Root window: 0x%x", X.RootWin())
    log.Printf("Screen dimensions: %dx%d", X.Screen().WidthInPixels, X.Screen().HeightInPixels)

    // For custom display strings:
    // X, err := xgbutil.NewConnDisplay(":1")
    // X, err := xgbutil.NewConnDisplay("hostname:2.1")
}
```

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

### Render Image to X Window in Go

Source: https://context7.com/burntsushi/xgbutil/llms.txt

Utilize the `xgraphics` package to create and manipulate images, then render them to X windows. Supports direct pixel manipulation and scaling. Requires xgbutil, xgraphics, and xwindow packages.

```go
package main

import (
    "image"
    "image/color"
    "log"

    "github.com/BurntSushi/xgb/xproto"

    "github.com/BurntSushi/xgbutil"
    "github.com/BurntSushi/xgbutil/xevent"
    "github.com/BurntSushi/xgbutil/xgraphics"
    "github.com/BurntSushi/xgbutil/xwindow"
)

func main() {
    X, err := xgbutil.NewConn()
    if err != nil {
        log.Fatal(err)
    }

    // Create a new xgraphics image
    width, height := 400, 300
    ximg := xgraphics.New(X, image.Rect(0, 0, width, height))

    // Draw gradient using ForExp (fast pixel manipulation)
    ximg.ForExp(func(x, y int) (r, g, b, a uint8) {
        return uint8(x * 255 / width),   // Red gradient
               uint8(y * 255 / height),  // Green gradient
               128,                       // Blue constant
               255                        // Alpha opaque
    })

    // Alternative: Set individual pixels
    for x := 50; x < 100; x++ {
        for y := 50; y < 100; y++ {
            ximg.Set(x, y, color.RGBA{255, 0, 0, 255})
        }
    }

    // Create window using convenience method (handles pixmap setup)
    win := ximg.Window(X.RootWin())
    win.Map()

    // Manual approach for more control:
    // win2, _ := xwindow.Generate(X)
    // win2.Create(X.RootWin(), 0, 0, width, height, 0)
    // ximg.XSurfaceSet(win2.Id)  // Set pixmap as window background
    // ximg.XDraw()                // Draw image data to pixmap
    // ximg.XPaint(win2.Id)        // Paint pixmap to window
    // ximg.Destroy()              // Free pixmap when done
    // win2.Map()

    // Scale image
    // scaledImg := ximg.Scale(800, 600)

    // Save to file
    // ximg.SavePng("output.png")

    // Handle window close
    win.Listen(xproto.EventMaskStructureNotify)
    xevent.DestroyNotifyFun(func(X *xgbutil.XUtil, e xevent.DestroyNotifyEvent) {
        xevent.Quit(X)
    }).Connect(X, win.Id)

    xevent.Main(X)
}
```

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

### Listen for Window Events

Source: https://context7.com/burntsushi/xgbutil/llms.txt

Configures a window to listen for specific X events, such as KeyPress and Exposure.

```go
win.Listen(xproto.EventMaskKeyPress, xproto.EventMaskExposure)
```

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

### Map (Show) a Window

Source: https://context7.com/burntsushi/xgbutil/llms.txt

Makes a created window visible on the screen.

```go
win.Map()
```

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

### Create a New X Window

Source: https://context7.com/burntsushi/xgbutil/llms.txt

Generates a new window ID and creates a window with specified geometry, attributes, and event masks. Use CreateChecked for error handling.

```go
win, err := xwindow.Generate(X)
    if err != nil {
        log.Fatal(err)
    }

    // Create window with geometry and attributes
    // CreateChecked returns error if window creation fails
    err = win.CreateChecked(X.RootWin(), 50, 50, 400, 300,
        xproto.CwBackPixel|xproto.CwEventMask,
        0x0000ff, // Blue background
        xproto.EventMaskStructureNotify|xproto.EventMaskKeyPress)
    if err != nil {
        log.Fatal(err)
    }
```

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

### Set Window Focus

Source: https://context7.com/burntsushi/xgbutil/llms.txt

Gives keyboard focus to the specified window.

```go
win.Focus()
```

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

### Configure Keyboard Bindings

Source: https://context7.com/burntsushi/xgbutil/llms.txt

Registers keyboard shortcuts to callback handlers using the [Modifier]-Key format.

```go
package main

import (
    "log"

    "github.com/BurntSushi/xgbutil"
    "github.com/BurntSushi/xgbutil/keybind"
    "github.com/BurntSushi/xgbutil/xevent"
)

func main() {
    X, err := xgbutil.NewConn()
    if err != nil {
        log.Fatal(err)
    }

    // Initialize keybind (required for persistent bindings on keymap changes)
    keybind.Initialize(X)

    // Bind Mod4+j (Super+j) to root window (global hotkey)
    err = keybind.KeyPressFun(func(X *xgbutil.XUtil, e xevent.KeyPressEvent) {
        log.Printf("Key pressed! Keycode: %d, State: %d", e.Detail, e.State)
    }).Connect(X, X.RootWin(), "Mod4-j", true) // true = grab key
    if err != nil {
        log.Fatal(err)
    }

    // Bind Escape to quit
    err = keybind.KeyPressFun(func(X *xgbutil.XUtil, e xevent.KeyPressEvent) {
        log.Println("Quitting...")
        xevent.Quit(X)
    }).Connect(X, X.RootWin(), "Escape", true)
    if err != nil {
        log.Fatal(err)
    }

    // Detach all key bindings from a window
    // keybind.Detach(X, X.RootWin())

    log.Println("Press Mod4+j to trigger, Escape to quit")
    xevent.Main(X)
}
```

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

### Set ICCCM Window Properties in Go

Source: https://context7.com/burntsushi/xgbutil/llms.txt

Use this to set standard window properties like title, icon name, size hints, and class for compatibility with older window managers. Requires xgbutil and icccm packages.

```go
package main

import (
    "log"

    "github.com/BurntSushi/xgb/xproto"

    "github.com/BurntSushi/xgbutil"
    "github.com/BurntSushi/xgbutil/icccm"
    "github.com/BurntSushi/xgbutil/xwindow"
)

func main() {
    X, err := xgbutil.NewConn()
    if err != nil {
        log.Fatal(err)
    }

    win, _ := xwindow.Generate(X)
    win.Create(X.RootWin(), 0, 0, 400, 300, xproto.CwBackPixel, 0xff0000)

    // Set WM_NAME (window title for older WMs)
    icccm.WmNameSet(X, win.Id, "My ICCCM Window")

    // Set WM_ICON_NAME (iconified title)
    icccm.WmIconNameSet(X, win.Id, "MyIcon")

    // Set size hints (min/max size, resize increments, etc.)
    hints := &icccm.NormalHints{
        Flags:     icccm.SizeHintPMinSize | icccm.SizeHintPMaxSize,
        MinWidth:  200,
        MinHeight: 150,
        MaxWidth:  800,
        MaxHeight: 600,
    }
    icccm.WmNormalHintsSet(X, win.Id, hints)

    // Set WM_HINTS (input focus, initial state, etc.)
    wmHints := &icccm.Hints{
        Flags:        icccm.HintInput | icccm.HintState,
        Input:        1, // Accept input focus
        InitialState: icccm.StateNormal,
    }
    icccm.WmHintsSet(X, win.Id, wmHints)

    // Set WM_CLASS (app name and class for WM classification)
    icccm.WmClassSet(X, win.Id, &icccm.WmClass{
        Instance: "myapp",
        Class:    "MyApp",
    })

    // Get size hints from another window
    client := X.RootWin()
    if normalHints, err := icccm.WmNormalHintsGet(X, client); err == nil {
        log.Printf("Min size: %dx%d", normalHints.MinWidth, normalHints.MinHeight)
    }

    win.Map()
}
```

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

### Manage X Event Queue with xevent

Source: https://context7.com/burntsushi/xgbutil/llms.txt

Utilize `xevent` for advanced event queue management, including event compression and custom error handling. Ensure the window is listening for relevant events.

```go
package main

import (
    "log"

    "github.com/BurntSushi/xgb/xproto"

    "github.com/BurntSushi/xgbutil"
    "github.com/BurntSushi/xgbutil/xevent"
    "github.com/BurntSushi/xgbutil/xwindow"
)

func main() {
    X, err := xgbutil.NewConn()
    if err != nil {
        log.Fatal(err)
    }

    win, _ := xwindow.Generate(X)
    win.Create(X.RootWin(), 0, 0, 400, 300, xproto.CwBackPixel, 0x0000ff)
    win.Listen(xproto.EventMaskStructureNotify)
    win.Map()

    // ConfigureNotify with event compression
    xevent.ConfigureNotifyFun(func(X *xgbutil.XUtil, e xevent.ConfigureNotifyEvent) {
        // Sync and read any pending events
        X.Sync()
        xevent.Read(X, false) // false = non-blocking

        // Peek at the queue to find newer ConfigureNotify events
        lastEvent := e
        for i, queued := range xevent.Peek(X) {
            if queued.Err != nil {
                continue
            }
            if cn, ok := queued.Event.(xproto.ConfigureNotifyEvent); ok {
                if cn.Window == e.Window {
                    lastEvent = xevent.ConfigureNotifyEvent{&cn}
                    // Dequeue this event (use defer for LIFO order)
                    defer xevent.DequeueAt(X, i)
                }
            }
        }

        // Process only the most recent event
        log.Printf("Window resized to: %dx%d", lastEvent.Width, lastEvent.Height)
    }).Connect(X, win.Id)

    // Check if queue is empty
    if xevent.Empty(X) {
        log.Println("Event queue is empty")
    }

    // Set custom error handler
    xevent.ErrorHandlerSet(X, func(err xgb.Error) {
        log.Printf("X Error: %v", err)
    })

    // Quit the event loop gracefully
    // xevent.Quit(X)

    xevent.Main(X)
}
```

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

### Handle Graceful Window Close

Source: https://context7.com/burntsushi/xgbutil/llms.txt

Implements the ICCCM WM_DELETE_WINDOW protocol to allow graceful window closing, detaching event handlers and destroying the window.

```go
win.WMGracefulClose(func(w *xwindow.Window) {
        xevent.Detach(w.X, w.Id)
        mousebind.Detach(w.X, w.Id)
        keybind.Detach(w.X, w.Id)
        w.Destroy()
        xevent.Quit(X)
    })
```

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

### Connect X event callbacks in Go

Source: https://context7.com/burntsushi/xgbutil/llms.txt

Uses xevent to register typed callbacks for specific window events like ConfigureNotify, Expose, and pointer movements.

```go
package main

import (
    "log"

    "github.com/BurntSushi/xgb/xproto"

    "github.com/BurntSushi/xgbutil"
    "github.com/BurntSushi/xgbutil/xevent"
    "github.com/BurntSushi/xgbutil/xwindow"
)

func main() {
    X, err := xgbutil.NewConn()
    if err != nil {
        log.Fatal(err)
    }

    win, _ := xwindow.Generate(X)
    win.Create(X.RootWin(), 0, 0, 400, 300, xproto.CwBackPixel, 0xffffff)
    win.Listen(xproto.EventMaskStructureNotify, xproto.EventMaskExposure,
        xproto.EventMaskEnterWindow, xproto.EventMaskLeaveWindow)
    win.Map()

    // ConfigureNotify: window geometry changes
    xevent.ConfigureNotifyFun(func(X *xgbutil.XUtil, e xevent.ConfigureNotifyEvent) {
        log.Printf("Window configured: (%d, %d) %dx%d", e.X, e.Y, e.Width, e.Height)
    }).Connect(X, win.Id)

    // Expose: window needs redrawing
    xevent.ExposeFun(func(X *xgbutil.XUtil, e xevent.ExposeEvent) {
        log.Printf("Expose event: region (%d, %d) %dx%d", e.X, e.Y, e.Width, e.Height)
    }).Connect(X, win.Id)

    // EnterNotify: pointer enters window
    xevent.EnterNotifyFun(func(X *xgbutil.XUtil, e xevent.EnterNotifyEvent) {
        log.Println("Pointer entered window")
    }).Connect(X, win.Id)

    // LeaveNotify: pointer leaves window
    xevent.LeaveNotifyFun(func(X *xgbutil.XUtil, e xevent.LeaveNotifyEvent) {
        log.Println("Pointer left window")
    }).Connect(X, win.Id)

    // DestroyNotify: window destroyed
    xevent.DestroyNotifyFun(func(X *xgbutil.XUtil, e xevent.DestroyNotifyEvent) {
        log.Println("Window destroyed")
        xevent.Quit(X)
    }).Connect(X, win.Id)

    // Detach all callbacks from a window when done
    // xevent.Detach(X, win.Id)

    xevent.Main(X)
}
```

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

### Stack Window Above Others

Source: https://context7.com/burntsushi/xgbutil/llms.txt

Changes the stacking order of a window to be above other sibling windows.

```go
win.Stack(xproto.StackModeAbove)
```

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

### Move a Window

Source: https://context7.com/burntsushi/xgbutil/llms.txt

Changes the position of an existing window on the screen.

```go
win.Move(100, 100)
```

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

### Resize a Window

Source: https://context7.com/burntsushi/xgbutil/llms.txt

Changes the dimensions of an existing window.

```go
win.Resize(500, 400)
```

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

### Move and Resize a Window Simultaneously

Source: https://context7.com/burntsushi/xgbutil/llms.txt

Adjusts both the position and dimensions of a window in a single operation.

```go
win.MoveResize(200, 200, 600, 500)
```

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

### Handle Mouse Button Release Events

Source: https://context7.com/burntsushi/xgbutil/llms.txt

Connects a function to handle ButtonRelease events for a specific window. Useful for simple click detection.

```go
err = mousebind.ButtonReleaseFun(func(X *xgbutil.XUtil, e xevent.ButtonReleaseEvent) {
        log.Printf("Click at (%d, %d)", e.EventX, e.EventY)
    }).Connect(X, win.Id, "1", false, false)
```

=== COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.