golang set hotkey library

Golang is an efficient and reliable programming language that is widely used in developing web applications and network services. In Golang, if you need to set a shortcut key corresponding to a certain function, you can use the hotkey library, which can help you perform certain operations more quickly and improve the efficiency of your code. In this article, we will explain how to set up a hotkey library using Golang.

1. Install the Hotkey library

Before using the Hotkey library, you need to install it first. You can use the go get command to install the library, as shown below:

go get github.com/aloknerurkar/golibs/hotkey

2. Basic settings

Once the Hotkey library is installed, we can start setting up our own shortcuts Keyed. Here is a basic setup example:

package main

import (
    "fmt"
    "github.com/aloknerurkar/golibs/hotkey"
)

func main() {
    hotkey.Register(hotkey.CTRL+hotkey.SHIFT, 'A', func() {
        fmt.Println("你按下了 CTRL+SHIFT+A.")
    })
    hotkey.Wait()
}

In the above code, we created a shortcut key: CTRL SHIFT A. When the user presses this key combination, the app prints a message. The Wait method is required and will wait until a message is received.

3. Listening to keystrokes

In the last example, we set a shortcut key, but did not listen for keystrokes. When you want to use the hotkey library to listen for shortcut keys on the Windows platform, a system hook is used for processing. This is done to ensure that the shortcut keys can be received even in the background.

If you need to process other types of window messages, you can use the following code to achieve it:

package main

import (
    "fmt"
    "github.com/aloknerurkar/golibs/hotkey"
    "syscall"
    "unsafe"
)

var (
    kernel32           = syscall.MustLoadDLL("kernel32.dll")
    procGetModuleHandle = kernel32.MustFindProc("GetModuleHandleW")
    user32             = syscall.MustLoadDLL("user32.dll")
    winuser            = syscall.MustLoadDLL("user32.dll")
    GetMessage         = winuser.MustFindProc("GetMessageW")
)

func init() {
    procGetModuleHandle = kernel32.MustFindProc("GetModuleHandleW")
    user32 = syscall.MustLoadDLL("user32.dll")
}

func wndProc(hwnd syscall.Handle, msg uint32, wParam, lParam uintptr) uintptr {
    switch msg {
    case hotkey.WM_HOTKEY:
        hotkeyId := int(wParam)
        if hotkeyId == 0 {
            fmt.Println("Ctrl+Shift+Y pressed")
        }
    }
    return user32.CallNextHookEx(0, msg, wParam, lParam)
}

func main() {
    moduleHandle, _, _ := procGetModuleHandle.Call(0)
    user32.NewProc("RegisterHotKey").Call(
        uintptr(0),
        uintptr(0),
        uintptr(hotkey.CTRL+hotkey.SHIFT),
        uintptr('Y'),
    )
    user32.NewProc("SetWindowsHookExA").Call(
        uintptr(hotkey.WH_GETMESSAGE),
        uintptr(wndProc),
        moduleHandle,
        uintptr(0),
    )

    var msg hotkey.MSG
    for GetMessage.Call(uintptr(unsafe.Pointer(&msg)), 0, 0, 0) != 0 {
        hotkey.TranslateMessage.Call(uintptr(unsafe.Pointer(&msg)))
        hotkey.DispatchMessage.Call(uintptr(unsafe.Pointer(&msg)))
    }
}

In the above code, we use the user32 library and kernel32 library to process window messages, and also Includes constants and functions provided in the hotkey library. What you need to note is that in the Windows platform, the hotkey binding process needs to be run as an administrator, otherwise it may not work properly.

Summary

The above is a detailed introduction on how to use Golang to set up a hotkey library. Using hotkey settings can help you achieve faster coding and improve work efficiency. At the same time, when using this library, you should understand its usage restrictions and precautions to ensure the reliability and stability of your code.

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