go指定窗口置顶

go
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package setWindowTop

/*
#cgo windows LDFLAGS: -luser32
#include <windows.h>

// 设置指定窗口置顶
void SetWindowTopmost(HWND hwnd, int topmost) {
    SetWindowPos(hwnd, topmost ? HWND_TOPMOST : HWND_NOTOPMOST,
                 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE);
}

// 获取当前活动窗口
HWND GetActiveWindowHandle() {
    return GetForegroundWindow();
}
*/
import "C"
import (
	"log"
	"syscall"
	"unsafe"
)

// NullHWND 定义空窗口句柄常量
var NullHWND = (C.HWND)(unsafe.Pointer(uintptr(0)))

// FindWindowByTitle 根据窗口标题查找窗口句柄
func FindWindowByTitle(title string) C.HWND {
	user32 := syscall.MustLoadDLL("user32.dll")
	procFindWindow := user32.MustFindProc("FindWindowW")

	titlePtr, err := syscall.UTF16PtrFromString(title)
	if err != nil {
		log.Printf("转换窗口标题失败: %v", err)
		return NullHWND
	}

	hwnd, _, _ := procFindWindow.Call(0, uintptr(unsafe.Pointer(titlePtr)))
	return C.HWND(unsafe.Pointer(hwnd))
}

// SetWindowTop 窗口置顶
func SetWindowTop(hwnd C.HWND) {
	C.SetWindowTopmost(hwnd, 1)
}

// SetWindowNoTop 取消窗口置顶
func SetWindowNoTop(hwnd C.HWND) {
	C.SetWindowTopmost(hwnd, 0)
}

go
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// 使用一个唯一的窗口标题，便于后续查找
windowTitle := "Fyne置顶窗口示例_" + time.Now().Format("20060102150405")
hwnd := setWindowTop.FindWindowByTitle(windowTitle)
if hwnd == setWindowTop.NullHWND {
  log.Fatalf("未找到标题为 '%s' 的窗口", windowTitle)
}
fmt.Printf("找到窗口: %s (句柄: %d)\n", windowTitle, hwnd)

setWindowTop.SetWindowTop(hwnd)
fmt.Println("窗口已置顶")

go
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package main

import "C"
import (
	"fmt"
	"fyne-demo/setWindowTop"
	"fyne.io/fyne/v2"
	"fyne.io/fyne/v2/app"
	"fyne.io/fyne/v2/container"
	"fyne.io/fyne/v2/driver/desktop"
	"fyne.io/fyne/v2/widget"
	"log"
	"time"
)

func main() {
	// 使用一个唯一的窗口标题，便于后续查找
	windowTitle := "Fyne置顶窗口示例_" + time.Now().Format("20060102150405")
	a := app.New()
	a.SetIcon(resourceIconPng)
	logLifecycle(a)
	drv := fyne.CurrentApp().Driver()
	if drv, ok := drv.(desktop.Driver); ok {
		// 无边框窗口
		w := drv.CreateSplashWindow()
		w.SetTitle(windowTitle)
		w.Show()

		// 设置窗口内容
		clock := widget.NewLabel("Clock")
		button := widget.NewButton("置顶", func() {
			hwnd := setWindowTop.FindWindowByTitle(windowTitle)
			if hwnd == setWindowTop.NullHWND {
				log.Fatalf("未找到标题为 '%s' 的窗口", windowTitle)
			}
			fmt.Printf("找到窗口: %s (句柄: %d)\n", windowTitle, hwnd)

			setWindowTop.SetWindowTop(hwnd)
			fmt.Println("窗口已置顶")
		})
		button2 := widget.NewButton("取消置顶", func() {
			hwnd := setWindowTop.FindWindowByTitle(windowTitle)
			if hwnd == setWindowTop.NullHWND {
				log.Fatalf("未找到标题为 '%s' 的窗口", windowTitle)
			}
			fmt.Printf("找到窗口: %s (句柄: %d)\n", windowTitle, hwnd)

			setWindowTop.SetWindowNoTop(hwnd)
			fmt.Println("窗口已取消置顶")
		})
		newVBox := container.NewVBox(clock, widget.NewSeparator(), button, button2)
		w.SetContent(newVBox)
		if desk, ok := a.(desktop.App); ok {
			m := fyne.NewMenu("MyApp",
				fyne.NewMenuItem("Show", func() {
					w.Show()
				}),
				fyne.NewMenuItem("Quit", func() {
					a.Quit()
				}))
			desk.SetSystemTrayIcon(resourceIconPng)
			desk.SetSystemTrayMenu(m)
		}

		//w.SetCloseIntercept(func() {
		//	w.Hide()
		//})
	}
	drv.Run()
}

func logLifecycle(a fyne.App) {
	a.Lifecycle().SetOnStarted(func() {
		log.Println("Lifecycle: Started")
	})
	a.Lifecycle().SetOnStopped(func() {
		log.Println("Lifecycle: Stopped")
	})
	a.Lifecycle().SetOnEnteredForeground(func() {
		log.Println("Lifecycle: Entered Foreground")
	})
	a.Lifecycle().SetOnExitedForeground(func() {
		log.Println("Lifecycle: Exited Foreground")
	})
}