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https://github.com/wailsapp/wails.git
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104 lines
2.4 KiB
Go
104 lines
2.4 KiB
Go
//go:build windows
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package win32
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import (
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"fmt"
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"log"
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"syscall"
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"unsafe"
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)
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const (
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WS_MAXIMIZE = 0x01000000
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WS_MINIMIZE = 0x20000000
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GWL_STYLE = -16
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)
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const (
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SW_HIDE = 0
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SW_NORMAL = 1
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SW_SHOWNORMAL = 1
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SW_SHOWMINIMIZED = 2
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SW_MAXIMIZE = 3
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SW_SHOWMAXIMIZED = 3
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SW_SHOWNOACTIVATE = 4
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SW_SHOW = 5
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SW_MINIMIZE = 6
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SW_SHOWMINNOACTIVE = 7
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SW_SHOWNA = 8
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SW_RESTORE = 9
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SW_SHOWDEFAULT = 10
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SW_FORCEMINIMIZE = 11
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)
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// http://msdn.microsoft.com/en-us/library/windows/desktop/bb773244.aspx
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type MARGINS struct {
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CxLeftWidth, CxRightWidth, CyTopHeight, CyBottomHeight int32
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}
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func ExtendFrameIntoClientArea(hwnd uintptr) {
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// -1: Adds the default frame styling (aero shadow and e.g. rounded corners on Windows 11)
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// Also shows the caption buttons if transparent ant translucent but they don't work.
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// 0: Adds the default frame styling but no aero shadow, does not show the caption buttons.
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// 1: Adds the default frame styling (aero shadow and e.g. rounded corners on Windows 11) but no caption buttons
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// are shown if transparent ant translucent.
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margins := &MARGINS{1, 1, 1, 1} // Only extend 1 pixel to have the default frame styling but no caption buttons
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if err := dwmExtendFrameIntoClientArea(hwnd, margins); err != nil {
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log.Fatal(fmt.Errorf("DwmExtendFrameIntoClientArea failed: %s", err))
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}
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}
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func IsWindowMaximised(hwnd uintptr) bool {
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style := uint32(getWindowLong(hwnd, GWL_STYLE))
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return style&WS_MAXIMIZE != 0
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}
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func IsWindowMinimised(hwnd uintptr) bool {
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style := uint32(getWindowLong(hwnd, GWL_STYLE))
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return style&WS_MINIMIZE != 0
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}
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func RestoreWindow(hwnd uintptr) {
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showWindow(hwnd, SW_RESTORE)
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}
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func ShowWindow(hwnd uintptr) {
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showWindow(hwnd, SW_SHOW)
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}
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func ShowWindowMaximised(hwnd uintptr) {
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showWindow(hwnd, SW_MAXIMIZE)
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}
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func ShowWindowMinimised(hwnd uintptr) {
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showWindow(hwnd, SW_MINIMIZE)
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}
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func dwmExtendFrameIntoClientArea(hwnd uintptr, margins *MARGINS) error {
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ret, _, _ := procDwmExtendFrameIntoClientArea.Call(
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hwnd,
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uintptr(unsafe.Pointer(margins)))
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if ret != 0 {
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return syscall.GetLastError()
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}
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return nil
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}
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func getWindowLong(hwnd uintptr, index int) int32 {
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ret, _, _ := procGetWindowLong.Call(
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hwnd,
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uintptr(index))
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return int32(ret)
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}
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func showWindow(hwnd uintptr, cmdshow int) bool {
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ret, _, _ := procShowWindow.Call(
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hwnd,
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uintptr(cmdshow))
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return ret != 0
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}
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