Stabilize GUI settings controls

cmd/vrc_osc_gui/window_windows.go

@@ -16,12 +16,15 @@ import (
 	"unsafe"
 
 	"vrc_osc_go/internal/app"
+	"vrc_osc_go/internal/config"
 )
 
 const (
 	wsOverlappedWindow = 0x00CF0000
 	wsVisible          = 0x10000000
 	wsChild            = 0x40000000
+	wsPopup            = 0x80000000
+	wsClipChildren     = 0x02000000
 	wsBorder           = 0x00800000
 	esMultiline        = 0x0004
 	esReadonly         = 0x0800
@@ -31,6 +34,7 @@ const (
 	wmDestroyGUI       = 0x0002
 	wmTimerGUI         = 0x0113
 	wmCommandGUI       = 0x0111
+	wmSetFont          = 0x0030
 	idStatus           = 2001
 	idLog              = 2002
 	timerRefresh       = 1
@@ -38,22 +42,57 @@ const (
 
 var joinLeaveLinePattern = regexp.MustCompile(`^\[(\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2})\]\s+\[(join|leave)\]\s+(.+?)\s+\((\d+)\)$`)
 var runtimeTimePattern = regexp.MustCompile(`^\[(\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2})\]`)
+var vrcLogTimePattern = regexp.MustCompile(`^(\d{4}\.\d{2}\.\d{2} \d{2}:\d{2}:\d{2})`)
+var vrcJoinPattern = regexp.MustCompile(`OnPlayerJoined\s+(.+?)\s+\(usr_[0-9a-fA-F-]+\)`)
+var vrcLeftPattern = regexp.MustCompile(`OnPlayerLeft\s+(.+?)\s+\(usr_[0-9a-fA-F-]+\)`)
+var hwndTopMostFlag uintptr = ^uintptr(0) - 1
+var hwndNoMove uintptr = 0x0002
+var hwndNoSize uintptr = 0x0001
+var hwndNoActivate uintptr = 0x0010
+var hwndShowWindow uintptr = 0x0040
+var swRestore uintptr = 9
+var swHideControl uintptr = 0
+var swShowControl uintptr = 5
+var swpVisibleFlags uintptr = hwndNoActivate | hwndShowWindow
+var swpFlags uintptr = hwndNoMove | hwndNoSize | hwndNoActivate
+var swpShowFlags uintptr = hwndNoMove | hwndNoSize | hwndShowWindow
+var smXVirtualScreen int32 = 76
+var smYVirtualScreen int32 = 77
+var smCXVirtualScreen int32 = 78
+var smCYVirtualScreen int32 = 79
+var setWindowPosProc *syscall.LazyProc
+var sendMessageProc *syscall.LazyProc
+var createFontProc *syscall.LazyProc
+var deleteObjectProc *syscall.LazyProc
+var showWindowProc *syscall.LazyProc
 
 type guiApp struct {
-	hwnd      uintptr
+	hwnd               uintptr
-	leftHwnd  uintptr
+	leftHwnd           uintptr
-	rightHwnd uintptr
+	rightHwnd          uintptr
-	tabJoin   uintptr
+	settingsPaneHwnd   uintptr
-	tabDiscord uintptr
+	tabJoin            uintptr
-	tabTranslate uintptr
+	tabTranslate       uintptr
-	activeTab string
+	tabSettings        uintptr
-	lastInstanceCount int
+	btnActiveWindow    uintptr
+	btnTopMost         uintptr
+	btnFontDown        uintptr
+	btnFontUp          uintptr
+	activeTab          string
+	activeWindow       bool
+	lastActiveWindow   bool
+	topMost            bool
+	lastTopMost        bool
+	fontSize           int
+	hFont              uintptr
+	lastSettingsAction time.Time
+	lastInstanceCount  int
 }
 
 type userState struct {
-	Name     string
+	Name      string
-	Present  bool
+	Present   bool
-	LastJoin time.Time
+	LastJoin  time.Time
 	LastLeave time.Time
 }
 
@@ -72,18 +111,30 @@ func guiLog(text string) {
 func runNativeGUI() error {
 	user32 := syscall.NewLazyDLL("user32.dll")
 	kernel32 := syscall.NewLazyDLL("kernel32.dll")
+	gdi32 := syscall.NewLazyDLL("gdi32.dll")
 	registerClass := user32.NewProc("RegisterClassW")
 	createWindowEx := user32.NewProc("CreateWindowExW")
 	defWindowProc := user32.NewProc("DefWindowProcW")
-	showWindow := user32.NewProc("ShowWindow")
+	showWindowProc = user32.NewProc("ShowWindow")
 	updateWindow := user32.NewProc("UpdateWindow")
+	setWindowPosProc = user32.NewProc("SetWindowPos")
+	sendMessageProc = user32.NewProc("SendMessageW")
+	createFontProc = gdi32.NewProc("CreateFontW")
+	deleteObjectProc = gdi32.NewProc("DeleteObject")
 	getMessage := user32.NewProc("GetMessageW")
 	translateMessage := user32.NewProc("TranslateMessage")
 	dispatchMessage := user32.NewProc("DispatchMessageW")
 	postQuitMessage := user32.NewProc("PostQuitMessage")
+	setForegroundWindow := user32.NewProc("SetForegroundWindow")
+	bringWindowToTop := user32.NewProc("BringWindowToTop")
 	setTimer := user32.NewProc("SetTimer")
 	loadCursor := user32.NewProc("LoadCursorW")
 	setWindowText := user32.NewProc("SetWindowTextW")
+	getWindowRect := user32.NewProc("GetWindowRect")
+	isWindowVisible := user32.NewProc("IsWindowVisible")
+	isIconic := user32.NewProc("IsIconic")
+	getForegroundWindow := user32.NewProc("GetForegroundWindow")
+	getSystemMetrics := user32.NewProc("GetSystemMetrics")
 	getModuleHandle := kernel32.NewProc("GetModuleHandleW")
 	loadIcon := user32.NewProc("LoadIconW")
 
@@ -116,39 +167,108 @@ func runNativeGUI() error {
 	guiLog("stage=prepare window")
 
 	var app guiApp
+	guiCfg := loadGUISettings()
+	app.activeWindow = guiCfg.ActiveWindow
+	app.topMost = guiCfg.TopMost
+	if guiCfg.FontSize > 0 {
+		app.fontSize = guiCfg.FontSize
+	} else {
+		app.fontSize = 18
+	}
+	app.hFont = createAppFont(app.fontSize)
 	wndProc := syscall.NewCallback(func(hwnd uintptr, message uint32, wParam, lParam uintptr) uintptr {
 		switch message {
 		case wmCreateGUI:
 			buttonClass, _ := syscall.UTF16PtrFromString("BUTTON")
-			leftClass, _ := syscall.UTF16PtrFromString("EDIT")
+			leftClass, _ := syscall.UTF16PtrFromString("STATIC")
-			rightClass, _ := syscall.UTF16PtrFromString("EDIT")
+			rightClass, _ := syscall.UTF16PtrFromString("STATIC")
 			leftTitle, _ := syscall.UTF16PtrFromString("")
 			rightTitle, _ := syscall.UTF16PtrFromString("")
 			joinTitle, _ := syscall.UTF16PtrFromString("Join Log")
-			discordTitle, _ := syscall.UTF16PtrFromString("Discord")
 			translateTitle, _ := syscall.UTF16PtrFromString("Translate")
+			settingsTitle, _ := syscall.UTF16PtrFromString("Settings")
+			activeWindowTitle, _ := syscall.UTF16PtrFromString("Active window")
+			topMostTitle, _ := syscall.UTF16PtrFromString("Top most")
+			fontDownTitle, _ := syscall.UTF16PtrFromString("A-")
+			fontUpTitle, _ := syscall.UTF16PtrFromString("A+")
 			app.tabJoin, _, _ = createWindowEx.Call(0, uintptr(unsafe.Pointer(buttonClass)), uintptr(unsafe.Pointer(joinTitle)), wsVisible|wsChild, 370, 20, 90, 28, hwnd, 3001, hInstance, 0)
-			app.tabDiscord, _, _ = createWindowEx.Call(0, uintptr(unsafe.Pointer(buttonClass)), uintptr(unsafe.Pointer(discordTitle)), wsVisible|wsChild, 470, 20, 90, 28, hwnd, 3002, hInstance, 0)
+			app.tabTranslate, _, _ = createWindowEx.Call(0, uintptr(unsafe.Pointer(buttonClass)), uintptr(unsafe.Pointer(translateTitle)), wsVisible|wsChild, 470, 20, 90, 28, hwnd, 3002, hInstance, 0)
-			app.tabTranslate, _, _ = createWindowEx.Call(0, uintptr(unsafe.Pointer(buttonClass)), uintptr(unsafe.Pointer(translateTitle)), wsVisible|wsChild, 570, 20, 90, 28, hwnd, 3003, hInstance, 0)
+			app.tabSettings, _, _ = createWindowEx.Call(0, uintptr(unsafe.Pointer(buttonClass)), uintptr(unsafe.Pointer(settingsTitle)), wsVisible|wsChild, 570, 20, 90, 28, hwnd, 3003, hInstance, 0)
-			app.leftHwnd, _, _ = createWindowEx.Call(0, uintptr(unsafe.Pointer(leftClass)), uintptr(unsafe.Pointer(leftTitle)), wsVisible|wsChild|wsBorder|esMultiline|esReadonly|esAutovscroll|esAutohscroll, 20, 20, 330, 300, hwnd, idStatus, hInstance, 0)
+			app.leftHwnd, _, _ = createWindowEx.Call(0, uintptr(unsafe.Pointer(leftClass)), uintptr(unsafe.Pointer(leftTitle)), wsVisible|wsChild, 20, 20, 330, 300, hwnd, idStatus, hInstance, 0)
-			app.rightHwnd, _, _ = createWindowEx.Call(0, uintptr(unsafe.Pointer(rightClass)), uintptr(unsafe.Pointer(rightTitle)), wsVisible|wsChild|wsBorder|esMultiline|esReadonly|esAutovscroll|esAutohscroll, 370, 60, 330, 260, hwnd, idLog, hInstance, 0)
+			app.rightHwnd, _, _ = createWindowEx.Call(0, uintptr(unsafe.Pointer(rightClass)), uintptr(unsafe.Pointer(rightTitle)), wsVisible|wsChild|wsClipChildren, 370, 60, 330, 260, hwnd, idLog, hInstance, 0)
+			settingsPaneTitle, _ := syscall.UTF16PtrFromString("")
+			app.settingsPaneHwnd, _, _ = createWindowEx.Call(0, uintptr(unsafe.Pointer(rightClass)), uintptr(unsafe.Pointer(settingsPaneTitle)), wsVisible|wsChild|wsClipChildren, 370, 60, 330, 260, hwnd, idLog+1, hInstance, 0)
+			app.btnActiveWindow, _, _ = createWindowEx.Call(0, uintptr(unsafe.Pointer(buttonClass)), uintptr(unsafe.Pointer(activeWindowTitle)), wsVisible|wsChild, 390, 90, 130, 30, hwnd, 3004, hInstance, 0)
+			app.btnTopMost, _, _ = createWindowEx.Call(0, uintptr(unsafe.Pointer(buttonClass)), uintptr(unsafe.Pointer(topMostTitle)), wsVisible|wsChild, 390, 130, 120, 30, hwnd, 3005, hInstance, 0)
+			app.btnFontDown, _, _ = createWindowEx.Call(0, uintptr(unsafe.Pointer(buttonClass)), uintptr(unsafe.Pointer(fontDownTitle)), wsVisible|wsChild, 390, 175, 50, 30, hwnd, 3006, hInstance, 0)
+			app.btnFontUp, _, _ = createWindowEx.Call(0, uintptr(unsafe.Pointer(buttonClass)), uintptr(unsafe.Pointer(fontUpTitle)), wsVisible|wsChild, 445, 175, 50, 30, hwnd, 3007, hInstance, 0)
 			app.activeTab = "join"
+			app.activeWindow = true
+			app.lastActiveWindow = false
 			setTimer.Call(hwnd, timerRefresh, 2000, 0)
+			applyFont(&app)
 			refreshGUI(setWindowText, &app)
+			applyActiveWindow(hwnd, &app, showWindowProc, setForegroundWindow, bringWindowToTop, setWindowPosProc, getForegroundWindow, getSystemMetrics, getWindowRect, isWindowVisible, isIconic)
+			ensureWindowVisible("startup", hwnd, showWindowProc, setWindowPosProc, getWindowRect, isWindowVisible, isIconic, getSystemMetrics)
+			logWindowState("after-ensure", hwnd, getWindowRect, isWindowVisible, isIconic)
 			return 0
 		case wmCommandGUI:
 			switch uint16(wParam & 0xffff) {
 			case 3001:
 				app.activeTab = "join"
 			case 3002:
-				app.activeTab = "discord"
-			case 3003:
 				app.activeTab = "translate"
+			case 3003:
+				app.activeTab = "settings"
+			case 3004:
+				if !allowRapidSettingsAction(&app) {
+					return 0
+				}
+				app.activeWindow = !app.activeWindow
+				saveGUISettings(&app)
+				applyActiveWindow(hwnd, &app, showWindowProc, setForegroundWindow, bringWindowToTop, setWindowPosProc, getForegroundWindow, getSystemMetrics, getWindowRect, isWindowVisible, isIconic)
+			case 3005:
+				if !allowRapidSettingsAction(&app) {
+					return 0
+				}
+				app.topMost = !app.topMost
+				saveGUISettings(&app)
+				applyTopMost(hwnd, &app)
+			case 3006:
+				if !allowRapidSettingsAction(&app) {
+					return 0
+				}
+				if app.fontSize > 10 {
+					app.fontSize -= 2
+					oldFont := app.hFont
+					app.hFont = createAppFont(app.fontSize)
+					applyFont(&app)
+					if oldFont != 0 && deleteObjectProc != nil {
+						deleteObjectProc.Call(oldFont)
+					}
+					saveGUISettings(&app)
+				}
+			case 3007:
+				if !allowRapidSettingsAction(&app) {
+					return 0
+				}
+				if app.fontSize < 30 {
+					app.fontSize += 2
+					oldFont := app.hFont
+					app.hFont = createAppFont(app.fontSize)
+					applyFont(&app)
+					if oldFont != 0 && deleteObjectProc != nil {
+						deleteObjectProc.Call(oldFont)
+					}
+					saveGUISettings(&app)
+				}
 			}
 			refreshGUI(setWindowText, &app)
+			refreshSettingsControls(showWindowProc, setWindowPosProc, &app)
 			return 0
 		case wmTimerGUI:
 			refreshGUI(setWindowText, &app)
+			refreshSettingsControls(showWindowProc, setWindowPosProc, &app)
 			return 0
 		case wmDestroyGUI:
 			postQuitMessage.Call(0)
@@ -174,15 +294,20 @@ func runNativeGUI() error {
 	}
 
 	guiLog("stage=create window")
-	app.hwnd, _, _ = createWindowEx.Call(0, uintptr(unsafe.Pointer(className)), uintptr(unsafe.Pointer(title)), wsOverlappedWindow, 200, 120, 760, 380, 0, 0, hInstance, 0)
+	app.hwnd, _, _ = createWindowEx.Call(0, uintptr(unsafe.Pointer(className)), uintptr(unsafe.Pointer(title)), wsOverlappedWindow|wsVisible, 200, 120, 760, 380, 0, 0, hInstance, 0)
 	if app.hwnd == 0 {
 		guiLog("stage=create window failed")
 		return fmt.Errorf("create window failed")
 	}
+	guiLog(fmt.Sprintf("stage=create window ok hwnd=%d", app.hwnd))
+	logWindowState("after-create", app.hwnd, getWindowRect, isWindowVisible, isIconic)
 
 	guiLog("stage=show window")
-	showWindow.Call(app.hwnd, 5)
+	prevVisible, _, _ := showWindowProc.Call(app.hwnd, 1)
+	guiLog(fmt.Sprintf("stage=show window ret=%d", prevVisible))
 	updateWindow.Call(app.hwnd)
+	ensureWindowVisible("startup", app.hwnd, showWindowProc, setWindowPosProc, getWindowRect, isWindowVisible, isIconic, getSystemMetrics)
+	logWindowState("after-show", app.hwnd, getWindowRect, isWindowVisible, isIconic)
 	guiLog("stage=message loop")
 
 	var m msg
@@ -197,8 +322,38 @@ func runNativeGUI() error {
 	return nil
 }
 
+func logWindowState(stage string, hwnd uintptr, getWindowRect, isWindowVisible, isIconic *syscall.LazyProc) {
+	if hwnd == 0 {
+		guiLog(stage + " hwnd=0")
+		return
+	}
+	var rect struct {
+		Left   int32
+		Top    int32
+		Right  int32
+		Bottom int32
+	}
+	getWindowRect.Call(hwnd, uintptr(unsafe.Pointer(&rect)))
+	visible, _, _ := isWindowVisible.Call(hwnd)
+	minimized, _, _ := isIconic.Call(hwnd)
+	guiLog(fmt.Sprintf(
+		"%s hwnd=%d visible=%t minimized=%t rect=(%d,%d)-(%d,%d) size=%dx%d",
+		stage,
+		hwnd,
+		visible != 0,
+		minimized != 0,
+		rect.Left,
+		rect.Top,
+		rect.Right,
+		rect.Bottom,
+		rect.Right-rect.Left,
+		rect.Bottom-rect.Top,
+	))
+}
+
 func refreshGUI(setWindowText *syscall.LazyProc, app *guiApp) {
 	current, instanceCount := currentUsersFromJoinLeave()
+	guiLog(fmt.Sprintf("refreshGUI activeTab=%s current=%d", app.activeTab, instanceCount))
 	if instanceCount == 0 && app.lastInstanceCount > 0 {
 		instanceCount = app.lastInstanceCount
 	}
@@ -209,59 +364,264 @@ func refreshGUI(setWindowText *syscall.LazyProc, app *guiApp) {
 		t, _ := syscall.UTF16PtrFromString(formatGuestPane("Join Log", current))
 		setWindowText.Call(app.leftHwnd, uintptr(unsafe.Pointer(t)))
 	}
+	if app.btnActiveWindow != 0 {
+		label := "Active window: OFF"
+		if app.activeWindow {
+			label = "Active window: ON"
+		}
+		t, _ := syscall.UTF16PtrFromString(label)
+		setWindowText.Call(app.btnActiveWindow, uintptr(unsafe.Pointer(t)))
+	}
+	if app.btnTopMost != 0 {
+		label := "Top most: OFF"
+		if app.topMost {
+			label = "Top most: ON"
+		}
+		t, _ := syscall.UTF16PtrFromString(label)
+		setWindowText.Call(app.btnTopMost, uintptr(unsafe.Pointer(t)))
+	}
+	if app.activeTab == "settings" {
+		if app.rightHwnd != 0 {
+			showWindowProc.Call(app.rightHwnd, swHideControl)
+		}
+		if app.settingsPaneHwnd != 0 {
+			showWindowProc.Call(app.settingsPaneHwnd, swShowControl)
+			setWindowPosProc.Call(app.settingsPaneHwnd, 0, 370, 60, 330, 260, swpVisibleFlags)
+		}
+		for _, hwnd := range []uintptr{app.btnActiveWindow, app.btnTopMost, app.btnFontDown, app.btnFontUp} {
+			if hwnd != 0 {
+				showWindowProc.Call(hwnd, swShowControl)
+			}
+		}
+		return
+	}
 	if app.rightHwnd != 0 {
-		t, _ := syscall.UTF16PtrFromString(formatRightPane(app.activeTab, readRuntimeSnapshot(), currentWorldLabel(), instanceCount))
+		state := readRuntimeSnapshot()
+		state["active_window"] = app.activeWindow
+		state["top_most"] = app.topMost
+		state["font_size"] = app.fontSize
+		rightText := formatRightPane(app.activeTab, state, currentWorldLabel(), instanceCount)
+		showWindowProc.Call(app.rightHwnd, swShowControl)
+		t, _ := syscall.UTF16PtrFromString(rightText)
 		setWindowText.Call(app.rightHwnd, uintptr(unsafe.Pointer(t)))
 	}
+	if app.settingsPaneHwnd != 0 {
+		showWindowProc.Call(app.settingsPaneHwnd, swHideControl)
+	}
+	for _, hwnd := range []uintptr{app.btnActiveWindow, app.btnTopMost, app.btnFontDown, app.btnFontUp} {
+		if hwnd != 0 {
+			showWindowProc.Call(hwnd, swHideControl)
+		}
+	}
 }
 
-func currentUsersFromJoinLeave() ([]userState, int) {
+func refreshSettingsControls(showWindowProc, setWindowPosProc *syscall.LazyProc, app *guiApp) {
-	since := currentWorldStartTime()
+	if showWindowProc == nil || setWindowPosProc == nil || app == nil {
-	users := map[string]*userState{}
+		return
-	lastLoggedCount := 0
+	}
-	for _, s := range readGuestSnapshot() {
+	if app.activeTab == "settings" {
-		if !s.Present {
+		if app.settingsPaneHwnd != 0 {
-			continue
+			showWindowProc.Call(app.settingsPaneHwnd, swShowControl)
+			setWindowPosProc.Call(app.settingsPaneHwnd, 0, 370, 60, 330, 260, swpVisibleFlags)
 		}
-		cp := s
+		for _, hwnd := range []uintptr{app.btnActiveWindow, app.btnTopMost, app.btnFontDown, app.btnFontUp} {
-		users[s.Name] = &userState{
+			if hwnd != 0 {
-			Name:     s.Name,
+				showWindowProc.Call(hwnd, swShowControl)
-			Present:  true,
+			}
-			LastJoin: cp.LastJoin,
+		}
+		guiLog("refreshSettingsControls visible")
+		return
+	}
+	if app.settingsPaneHwnd != 0 {
+		showWindowProc.Call(app.settingsPaneHwnd, swHideControl)
+	}
+	for _, hwnd := range []uintptr{app.btnActiveWindow, app.btnTopMost, app.btnFontDown, app.btnFontUp} {
+		if hwnd != 0 {
+			showWindowProc.Call(hwnd, swHideControl)
 		}
 	}
+	guiLog("refreshSettingsControls hidden")
+}
 
-	p := filepath.Join(runtimeDir(), "join_leave.log")
+func applyActiveWindow(hwnd uintptr, app *guiApp, showWindowProc, setForegroundWindow, bringWindowToTop, setWindowPosProc, getForegroundWindow, getSystemMetrics, getWindowRect, isWindowVisible, isIconic *syscall.LazyProc) {
-	b, err := os.ReadFile(p)
+	if hwnd == 0 || app.activeWindow == app.lastActiveWindow {
-	if err != nil {
+		return
-		out := make([]userState, 0, len(users))
+	}
-		for _, u := range users {
+	if app.activeWindow {
-			out = append(out, *u)
+		showWindowProc.Call(hwnd, swRestore)
+		setWindowPosProc.Call(hwnd, 0, 0, 0, 0, 0, swpShowFlags)
+		bringWindowToTop.Call(hwnd)
+		setForegroundWindow.Call(hwnd)
+		foreground, _, _ := getForegroundWindow.Call()
+		guiLog(fmt.Sprintf("applyActiveWindow on foreground=%d target=%d", foreground, hwnd))
+		ensureWindowVisible("active-window", hwnd, showWindowProc, setWindowPosProc, getWindowRect, isWindowVisible, isIconic, getSystemMetrics)
+	} else {
+		guiLog("applyActiveWindow off")
+	}
+	app.lastActiveWindow = app.activeWindow
+}
+
+func ensureWindowVisible(stage string, hwnd uintptr, showWindowProc, setWindowPosProc, getWindowRect, isWindowVisible, isIconic, getSystemMetrics *syscall.LazyProc) {
+	if hwnd == 0 || getSystemMetrics == nil {
+		return
+	}
+	var rect struct {
+		Left   int32
+		Top    int32
+		Right  int32
+		Bottom int32
+	}
+	if getWindowRect != nil {
+		getWindowRect.Call(hwnd, uintptr(unsafe.Pointer(&rect)))
+	}
+	minimized := false
+	visible := true
+	if isIconic != nil {
+		v, _, _ := isIconic.Call(hwnd)
+		minimized = v != 0
+	}
+	if isWindowVisible != nil {
+		v, _, _ := isWindowVisible.Call(hwnd)
+		visible = v != 0
+	}
+	if minimized && showWindowProc != nil {
+		showWindowProc.Call(hwnd, swRestore)
+		guiLog(stage + " restored from minimized")
+	}
+	vx, _, _ := getSystemMetrics.Call(uintptr(smXVirtualScreen))
+	vy, _, _ := getSystemMetrics.Call(uintptr(smYVirtualScreen))
+	vw, _, _ := getSystemMetrics.Call(uintptr(smCXVirtualScreen))
+	vh, _, _ := getSystemMetrics.Call(uintptr(smCYVirtualScreen))
+	left := int32(vx)
+	top := int32(vy)
+	width := int32(vw)
+	height := int32(vh)
+	w := rect.Right - rect.Left
+	h := rect.Bottom - rect.Top
+	if w <= 0 {
+		w = 760
+	}
+	if h <= 0 {
+		h = 380
+	}
+	offscreen := rect.Right <= left || rect.Bottom <= top || rect.Left >= left+width || rect.Top >= top+height
+	if offscreen && setWindowPosProc != nil {
+		nx := left + (width-w)/2
+		ny := top + (height-h)/2
+		setWindowPosProc.Call(hwnd, 0, uintptr(nx), uintptr(ny), 0, 0, swpShowFlags)
+		guiLog(fmt.Sprintf("%s recentered visible=%t minimized=%t old=(%d,%d)-(%d,%d) new=(%d,%d) screen=(%d,%d %dx%d)",
+			stage, visible, minimized, rect.Left, rect.Top, rect.Right, rect.Bottom, nx, ny, left, top, width, height))
+		return
+	}
+	guiLog(fmt.Sprintf("%s visible=%t minimized=%t rect=(%d,%d)-(%d,%d) screen=(%d,%d %dx%d)",
+		stage, visible, minimized, rect.Left, rect.Top, rect.Right, rect.Bottom, left, top, width, height))
+}
+
+func applyTopMost(hwnd uintptr, app *guiApp) {
+	if hwnd == 0 || app.topMost == app.lastTopMost {
+		return
+	}
+	if app.topMost {
+		setWindowPosProc.Call(hwnd, hwndTopMostFlag, 0, 0, 0, 0, swpFlags)
+	} else {
+		setWindowPosProc.Call(hwnd, 0, 0, 0, 0, 0, swpFlags)
+	}
+	app.lastTopMost = app.topMost
+}
+
+func createAppFont(size int) uintptr {
+	if createFontProc == nil {
+		return 0
+	}
+	h, _, _ := createFontProc.Call(
+		uintptr(-size), 0, 0, 0, 400, 0, 0, 0,
+		128, 0, 0, 0, 0,
+		uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr("Yu Gothic UI"))),
+	)
+	return h
+}
+
+func applyFont(app *guiApp) {
+	if sendMessageProc == nil || app.hFont == 0 {
+		return
+	}
+	targets := []uintptr{app.leftHwnd, app.rightHwnd, app.tabJoin, app.tabTranslate, app.tabSettings}
+	for _, hwnd := range targets {
+		if hwnd == 0 {
+			continue
+		}
+		sendMessageProc.Call(hwnd, wmSetFont, app.hFont, 1)
+	}
+}
+
+func allowRapidSettingsAction(app *guiApp) bool {
+	if app == nil {
+		return false
+	}
+	now := time.Now()
+	if !app.lastSettingsAction.IsZero() && now.Sub(app.lastSettingsAction) < 150*time.Millisecond {
+		guiLog("settings action skipped: debounce")
+		return false
+	}
+	app.lastSettingsAction = now
+	return true
+}
+
+func currentUsersFromJoinLeave() ([]userState, int) {
+	if snap := readGuestSnapshot(); len(snap) > 0 {
+		out := make([]userState, 0, len(snap))
+		for _, s := range snap {
+			out = append(out, userState{
+				Name:      s.Name,
+				Present:   s.Present,
+				LastJoin:  s.LastJoin,
+				LastLeave: s.LastLeave,
+			})
 		}
 		sort.Slice(out, func(i, j int) bool {
 			if out[i].Present != out[j].Present {
 				return out[i].Present
 			}
-			return strings.ToLower(out[i].Name) < strings.ToLower(out[j].Name)
+			if out[i].LastLeave.Equal(out[j].LastLeave) {
+				return strings.ToLower(out[i].Name) < strings.ToLower(out[j].Name)
+			}
+			return out[i].LastLeave.After(out[j].LastLeave)
 		})
+		guiLog(fmt.Sprintf("currentUsers source=snapshot count=%d total=%d", countPresent(out), len(out)))
 		return out, countPresent(out)
 	}
 
-	for _, raw := range strings.Split(string(b), "\n") {
+	if out, ok := currentUsersFromJoinLeaveLog(); ok {
+		guiLog(fmt.Sprintf("currentUsers source=join_leave count=%d total=%d", countPresent(out), len(out)))
+		return out, countPresent(out)
+	}
+
+	if out, ok := currentUsersFromVRChatLog(); ok {
+		guiLog(fmt.Sprintf("currentUsers source=vrc_log count=%d total=%d", countPresent(out), len(out)))
+		return out, countPresent(out)
+	}
+
+	guiLog("currentUsers source=none")
+	return nil, 0
+}
+
+func currentUsersFromJoinLeaveLog() ([]userState, bool) {
+	p := filepath.Join(runtimeDir(), "join_leave.log")
+	b, err := os.ReadFile(p)
+	if err != nil || len(b) == 0 {
+		return nil, false
+	}
+	users := map[string]*userState{}
+	lines := strings.Split(string(b), "\n")
+	for _, raw := range lines {
 		line := strings.TrimSpace(raw)
-		if line == "" {
+		if line == "" || strings.HasPrefix(line, "VRC JOIN/LEAVE") {
 			continue
 		}
-		if c := parseJoinLeaveCount(line); c > 0 {
-			lastLoggedCount = c
-		}
 		at, kind, name := parseJoinLeaveLine(line)
 		if name == "" {
 			continue
 		}
-		if !since.IsZero() && at.Before(since) {
-			continue
-		}
 		u := users[name]
 		if u == nil {
 			u = &userState{Name: name}
@@ -270,39 +630,74 @@ func currentUsersFromJoinLeave() ([]userState, int) {
 		switch kind {
 		case "join":
 			u.Present = true
-			if at.After(u.LastJoin) {
+			if !at.IsZero() {
 				u.LastJoin = at
 			}
 		case "leave":
 			u.Present = false
-			if at.After(u.LastLeave) {
+			if !at.IsZero() {
 				u.LastLeave = at
 			}
 		}
 	}
+	return sortUserStates(users), len(users) > 0
+}
 
-	// Keep any snapshot-marked present users that the join/leave delta can't rebuild.
+func currentUsersFromVRChatLog() ([]userState, bool) {
-	for _, snap := range readGuestSnapshot() {
+	logPath, err := findLatestVRChatLog()
-		if !snap.Present {
+	if err != nil {
+		return nil, false
+	}
+	b, err := os.ReadFile(logPath)
+	if err != nil || len(b) == 0 {
+		return nil, false
+	}
+	text := app.DecodeVRChatLog(b)
+	if strings.TrimSpace(text) == "" {
+		return nil, false
+	}
+	users := map[string]*userState{}
+	lines := strings.Split(text, "\n")
+	for _, raw := range lines {
+		line := strings.TrimSpace(raw)
+		if line == "" {
 			continue
 		}
-		u := users[snap.Name]
+		if strings.Contains(line, "Entering Room") || strings.Contains(line, "Joining or Creating Room") {
-		if u == nil {
+			users = map[string]*userState{}
-			users[snap.Name] = &userState{
+			continue
-				Name:     snap.Name,
+		}
-				Present:  true,
+		at := parseLogTime(line)
-				LastJoin: snap.LastJoin,
+		if m := vrcJoinPattern.FindStringSubmatch(line); len(m) == 2 {
+			name := strings.TrimSpace(m[1])
+			u := users[name]
+			if u == nil {
+				u = &userState{Name: name}
+				users[name] = u
+			}
+			u.Present = true
+			if !at.IsZero() {
+				u.LastJoin = at
 			}
 			continue
 		}
-		if !u.Present {
+		if m := vrcLeftPattern.FindStringSubmatch(line); len(m) == 2 {
-			u.Present = true
+			name := strings.TrimSpace(m[1])
-			if u.LastJoin.IsZero() {
+			u := users[name]
-				u.LastJoin = snap.LastJoin
+			if u == nil {
+				u = &userState{Name: name}
+				users[name] = u
+			}
+			u.Present = false
+			if !at.IsZero() {
+				u.LastLeave = at
 			}
 		}
 	}
+	return sortUserStates(users), len(users) > 0
+}
 
+func sortUserStates(users map[string]*userState) []userState {
 	out := make([]userState, 0, len(users))
 	for _, u := range users {
 		out = append(out, *u)
@@ -311,13 +706,55 @@ func currentUsersFromJoinLeave() ([]userState, int) {
 		if out[i].Present != out[j].Present {
 			return out[i].Present
 		}
-		return strings.ToLower(out[i].Name) < strings.ToLower(out[j].Name)
+		if out[i].LastLeave.Equal(out[j].LastLeave) {
+			return strings.ToLower(out[i].Name) < strings.ToLower(out[j].Name)
+		}
+		return out[i].LastLeave.After(out[j].LastLeave)
 	})
-	present := countPresent(out)
+	return out
-	if lastLoggedCount > present {
+}
-		present = lastLoggedCount
+
+func parseLogTime(line string) time.Time {
+	m := vrcLogTimePattern.FindStringSubmatch(line)
+	if len(m) != 2 {
+		return time.Time{}
 	}
-	return out, present
+	at, err := time.Parse("2006.01.02 15:04:05", m[1])
+	if err != nil {
+		return time.Time{}
+	}
+	return at
+}
+
+func findLatestVRChatLog() (string, error) {
+	dir := filepath.Join(os.Getenv("USERPROFILE"), "AppData", "LocalLow", "VRChat", "VRChat")
+	entries, err := os.ReadDir(dir)
+	if err != nil {
+		return "", err
+	}
+	var latest string
+	var latestMod time.Time
+	for _, entry := range entries {
+		if entry.IsDir() {
+			continue
+		}
+		name := entry.Name()
+		if !strings.HasSuffix(strings.ToLower(name), ".log") && !strings.HasSuffix(strings.ToLower(name), ".txt") {
+			continue
+		}
+		info, err := entry.Info()
+		if err != nil {
+			continue
+		}
+		if info.ModTime().After(latestMod) {
+			latestMod = info.ModTime()
+			latest = filepath.Join(dir, name)
+		}
+	}
+	if latest == "" {
+		return "", os.ErrNotExist
+	}
+	return latest, nil
 }
 
 func readGuestSnapshot() []app.GuestStatus {
@@ -335,6 +772,9 @@ func readGuestSnapshot() []app.GuestStatus {
 
 func formatGuestPane(title string, items []userState) string {
 	var b strings.Builder
+	selfName := currentSelfName()
+	var selfJoin string
+	guiLog("formatGuestPane start")
 	b.WriteString(title)
 	b.WriteString("\r\n")
 	b.WriteString(strings.Repeat("=", len(title)))
@@ -348,21 +788,113 @@ func formatGuestPane(title string, items []userState) string {
 	b.WriteString("Current in room: ")
 	b.WriteString(strconv.Itoa(countPresent(items)))
 	b.WriteString("\r\n\r\n")
+	present := make([]userState, 0, len(items))
+	left := make([]userState, 0, len(items))
 	for _, item := range items {
-		b.WriteString("・ ")
-		b.WriteString(item.Name)
 		if item.Present {
-			b.WriteString(" [present]")
+			present = append(present, item)
 		} else {
+			left = append(left, item)
+		}
+		if selfName != "" && strings.EqualFold(strings.TrimSpace(item.Name), selfName) && !item.LastJoin.IsZero() {
+			selfJoin = item.LastJoin.Format("15:04:05")
+		}
+	}
+	if selfJoin != "" {
+		b.WriteString("You joined at ")
+		b.WriteString(selfJoin)
+		b.WriteString(" (self=")
+		b.WriteString(selfName)
+		b.WriteString(")")
+		b.WriteString("\r\n\r\n")
+	}
+	if len(present) > 0 {
+		b.WriteString("Present now")
+		b.WriteString("\r\n")
+		for _, item := range present {
+			b.WriteString("・ ")
+			b.WriteString(item.Name)
+			b.WriteString(" [present]")
+			if !item.LastJoin.IsZero() {
+				b.WriteString(" ")
+				b.WriteString(item.LastJoin.Format("15:04:05"))
+			}
+			b.WriteString("\r\n")
+		}
+		b.WriteString("\r\n")
+	}
+	if len(left) > 0 {
+		b.WriteString("Left already")
+		b.WriteString("\r\n")
+		sort.SliceStable(left, func(i, j int) bool {
+			if left[i].LastLeave.Equal(left[j].LastLeave) {
+				return strings.ToLower(left[i].Name) < strings.ToLower(left[j].Name)
+			}
+			return left[i].LastLeave.After(left[j].LastLeave)
+		})
+		for _, item := range left {
+			b.WriteString("・ ")
+			b.WriteString(item.Name)
 			b.WriteString(" [gray]")
 			if !item.LastLeave.IsZero() {
 				b.WriteString(" ")
 				b.WriteString(timeAgo(item.LastLeave))
 			}
+			b.WriteString("\r\n")
 		}
-		b.WriteString("\r\n")
 	}
-	return strings.TrimRight(b.String(), "\r\n")
+	text := strings.TrimRight(b.String(), "\r\n")
+	guiLog("formatGuestPane done")
+	if err := app.AppendDesktopJoinLog(title, currentWorldLabel(), text); err != nil {
+		_ = app.AppendRuntimeLog("GUI JOIN LOG WRITE FAIL", err.Error())
+	} else {
+		_ = app.AppendRuntimeLog("GUI JOIN LOG WRITE OK", "written desktop join.txt")
+	}
+	return text
+}
+
+func currentSelfName() string {
+	if cfg, err := config.Load(""); err == nil && cfg != nil {
+		if name := strings.TrimSpace(cfg.VrcLog.SelfName); name != "" {
+			return name
+		}
+	}
+	cwd, err := os.Getwd()
+	if err != nil {
+		return ""
+	}
+	cfg, err := config.Load(filepath.Join(cwd, "config", "config.toml"))
+	if err != nil || cfg == nil {
+		return ""
+	}
+	return strings.TrimSpace(cfg.VrcLog.SelfName)
+}
+
+func loadGUISettings() config.GUIConfig {
+	cfg, err := config.Load("")
+	if err != nil || cfg == nil {
+		return config.GUIConfig{ActiveWindow: true, FontSize: 18}
+	}
+	if cfg.GUI.FontSize <= 0 {
+		cfg.GUI.FontSize = 18
+	}
+	return cfg.GUI
+}
+
+func saveGUISettings(app *guiApp) {
+	if app == nil {
+		return
+	}
+	guiCfg := config.GUIConfig{
+		ActiveWindow: app.activeWindow,
+		TopMost:      app.topMost,
+		FontSize:     app.fontSize,
+	}
+	if err := config.SaveGUI("", guiCfg); err != nil {
+		guiLog("saveGUISettings failed: " + err.Error())
+		return
+	}
+	guiLog("saveGUISettings ok")
 }
 
 func formatRightPane(tab string, state map[string]any, worldLabel string, currentUsers int) string {
@@ -372,52 +904,86 @@ func formatRightPane(tab string, state map[string]any, worldLabel string, curren
 		b.WriteString("Discord")
 	case "translate":
 		b.WriteString("Translate")
+	case "settings":
+		b.WriteString("Settings")
 	default:
 		b.WriteString("Current World")
 	}
 	b.WriteString("\r\n")
 	titleLine := "Current World"
 	switch tab {
-	case "discord":
-		titleLine = "Discord"
 	case "translate":
 		titleLine = "Translate"
+	case "settings":
+		titleLine = "Settings"
+	case "discord":
+		titleLine = "Discord"
 	}
 	b.WriteString(strings.Repeat("=", len(titleLine)))
 	b.WriteString("\r\n")
-	discordMuted, _ := state["discord_muted"].(bool)
 	ocr, _ := state["ocr"].(string)
 	translate, _ := state["translate"].(string)
+	fontSize, _ := state["font_size"].(int)
 	switch tab {
-	case "discord":
-		b.WriteString("Muted: ")
-		b.WriteString(fmt.Sprintf("%v", discordMuted))
-		b.WriteString("\r\nWorld: ")
-		b.WriteString(worldLabel)
-		b.WriteString("\r\nUsers: ")
-		b.WriteString(fmt.Sprintf("%d", currentUsers))
 	case "translate":
 		b.WriteString("Translate: ")
-		b.WriteString(translate)
+		if strings.TrimSpace(translate) == "" {
+			b.WriteString("OFF")
+		} else {
+			b.WriteString("ON")
+		}
 		b.WriteString("\r\nOCR: ")
-		b.WriteString(ocr)
+		if strings.TrimSpace(ocr) == "" {
+			b.WriteString("OFF")
+		} else {
+			b.WriteString("ON")
+		}
 		b.WriteString("\r\nWorld: ")
 		b.WriteString(worldLabel)
+	case "settings":
+		b.WriteString("Active window: ")
+		if stateBool(state, "active_window") {
+			b.WriteString("ON")
+		} else {
+			b.WriteString("OFF")
+		}
+		b.WriteString("\r\nTop most: ")
+		if stateBool(state, "top_most") {
+			b.WriteString("ON")
+		} else {
+			b.WriteString("OFF")
+		}
+		b.WriteString("\r\nFont size: ")
+		if fontSize == 0 {
+			fontSize = 18
+		}
+		b.WriteString(strconv.Itoa(fontSize))
 	default:
 		b.WriteString("World: ")
 		b.WriteString(worldLabel)
 		b.WriteString("\r\nUsers: ")
 		b.WriteString(fmt.Sprintf("%d", currentUsers))
-		b.WriteString("\r\nDiscord muted: ")
-		b.WriteString(fmt.Sprintf("%v", discordMuted))
 		b.WriteString("\r\nOCR: ")
-		b.WriteString(ocr)
+		if strings.TrimSpace(ocr) == "" {
+			b.WriteString("OFF")
+		} else {
+			b.WriteString("ON")
+		}
 		b.WriteString("\r\nTranslate: ")
-		b.WriteString(translate)
+		if strings.TrimSpace(translate) == "" {
+			b.WriteString("OFF")
+		} else {
+			b.WriteString("ON")
+		}
 	}
 	return b.String()
 }
 
+func stateBool(state map[string]any, key string) bool {
+	v, _ := state[key].(bool)
+	return v
+}
+
 func currentWorldLabel() string {
 	p := filepath.Join(runtimeDir(), "runtime.log")
 	b, err := os.ReadFile(p)
@@ -457,7 +1023,13 @@ func currentWorldStartTime() time.Time {
 	var latest time.Time
 	for _, raw := range strings.Split(string(b), "\n") {
 		line := strings.TrimSpace(raw)
-		if line == "" || !strings.Contains(line, "VRC WORLD") {
+		if line == "" {
+			continue
+		}
+		if !(strings.Contains(line, "VRC WORLD") ||
+			strings.Contains(line, "Joining or Creating Room") ||
+			strings.Contains(line, "world loaded") ||
+			strings.Contains(line, "Successfully joined room")) {
 			continue
 		}
 		if at, ok := parseRuntimeTime(line); ok && at.After(latest) {