71 lines
2.0 KiB
Go
71 lines
2.0 KiB
Go
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//go:build windows
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package platform
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import (
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"os"
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"syscall"
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"unsafe"
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)
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var (
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user32 = syscall.NewLazyDLL("user32.dll")
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kernel32 = syscall.NewLazyDLL("kernel32.dll")
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setWindowLong = user32.NewProc("SetWindowLongW")
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getWindowLong = user32.NewProc("GetWindowLongW")
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setWindowPos = user32.NewProc("SetWindowPos")
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enumWindows = user32.NewProc("EnumWindows")
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getWindowThreadProcessId = user32.NewProc("GetWindowThreadProcessId")
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getCurrentProcessId = kernel32.NewProc("GetCurrentProcessId")
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)
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const (
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GWL_STYLE = ^uintptr(15) // -16
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WS_THICKFRAME = 0x00040000
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WS_MAXIMIZEBOX = 0x00010000
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WS_MINIMIZEBOX = 0x00020000
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SWP_FRAMECHANGED = 0x0020
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SWP_NOMOVE = 0x0002
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SWP_NOSIZE = 0x0001
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SWP_NOZORDER = 0x0004
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SWP_NOACTIVATE = 0x0010
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)
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var mainHwnd uintptr
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// EnableResizeBorder re-adds the WS_THICKFRAME style to
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// the frameless Wails window so it can be resized from edges.
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func EnableResizeBorder() {
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pid, _, _ := getCurrentProcessId.Call()
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// Find our main window by enumerating top-level windows
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cb := syscall.NewCallback(func(hwnd uintptr, lparam uintptr) uintptr {
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var wpid uintptr
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getWindowThreadProcessId.Call(hwnd, uintptr(unsafe.Pointer(&wpid)))
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if wpid == pid {
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// Check if it's a visible owned window (not a child/message-only)
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style, _, _ := getWindowLong.Call(hwnd, GWL_STYLE)
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if style&0x10000000 != 0 && style&0x40000000 == 0 { // WS_VISIBLE && !WS_CHILD
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mainHwnd = hwnd
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return 0 // stop enumeration
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}
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}
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return 1 // continue
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})
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enumWindows.Call(cb, 0)
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if mainHwnd == 0 {
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return
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}
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style, _, _ := getWindowLong.Call(mainHwnd, GWL_STYLE)
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newStyle := style | WS_THICKFRAME | WS_MAXIMIZEBOX | WS_MINIMIZEBOX
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setWindowLong.Call(mainHwnd, GWL_STYLE, newStyle)
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setWindowPos.Call(mainHwnd, 0, 0, 0, 0, 0,
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SWP_FRAMECHANGED|SWP_NOMOVE|SWP_NOSIZE|SWP_NOZORDER|SWP_NOACTIVATE)
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// Log for debugging
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os.Stdout.WriteString("[platform] WS_THICKFRAME enabled on frameless window\n")
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}
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