Fix preview window growing on mode switch

Don't close/reopen preview when cycling All/One/Static modes.
Just update button labels and repaint in place, preserving window
size and position. Remove unused pvWinW/H saved size system.
Fit still reopens with calculated content size (All/One only).

aniphallow.lua

@@ -118,10 +118,6 @@ local S = {
     previewLayoutValue = 2,           -- number for fixed cols/rows
     previewMode        = "all",       -- "all", "single", or "static"
     previewSingleIdx   = 1,           -- which animation to show in single mode
-    -- Per-mode preview window size (0 = auto/not set yet)
-    pvWinWAll = 0, pvWinHAll = 0,
-    pvWinWOne = 0, pvWinHOne = 0,
-    pvWinWSta = 0, pvWinHSta = 0,
     -- Static preview scroll/pan
     previewStaScrollX  = 0,
     previewStaScrollY  = 0,
@@ -314,12 +310,6 @@ local function savePreset(presetName)
     f:write("gbAlwaysOverwrite=" .. tostring(S.gbAlwaysOverwrite) .. "\n")
     f:write("gbTileW=" .. S.gbTileW .. "\n")
     f:write("gbTileH=" .. S.gbTileH .. "\n")
-    f:write("pvWinWAll=" .. S.pvWinWAll .. "\n")
-    f:write("pvWinHAll=" .. S.pvWinHAll .. "\n")
-    f:write("pvWinWOne=" .. S.pvWinWOne .. "\n")
-    f:write("pvWinHOne=" .. S.pvWinHOne .. "\n")
-    f:write("pvWinWSta=" .. S.pvWinWSta .. "\n")
-    f:write("pvWinHSta=" .. S.pvWinHSta .. "\n")
     for i, name in ipairs(S.animNames) do
         f:write("anim_" .. (i - 1) .. "=" .. serializeFrames(S.anims[name] or {}) .. "\n")
     end
@@ -388,12 +378,6 @@ local function loadPreset(presetName)
             S.gbTileW = ts
             S.gbTileH = ts
         end
-        if k == "pvWinWAll" then S.pvWinWAll = tonumber(v) or 0 end
-        if k == "pvWinHAll" then S.pvWinHAll = tonumber(v) or 0 end
-        if k == "pvWinWOne" then S.pvWinWOne = tonumber(v) or 0 end
-        if k == "pvWinHOne" then S.pvWinHOne = tonumber(v) or 0 end
-        if k == "pvWinWSta" then S.pvWinWSta = tonumber(v) or 0 end
-        if k == "pvWinHSta" then S.pvWinHSta = tonumber(v) or 0 end
         -- Dynamic anim frames: anim_0, anim_1, ...
         local animIdx = k and string.match(k, "^anim_(%d+)$")
         if animIdx then
@@ -1346,41 +1330,14 @@ openPreviewWindow = function()
         end
     end
 
-    -- Save current window bounds into S for the given mode
+    -- Calculate initial canvas size from content fit
-    local function saveBoundsForMode(mode)
+    local pvWidth, pvHeight = calcPreviewSize()
-        if not previewDlg then return end
-        local ok, b = pcall(function() return previewDlg.bounds end)
-        if not ok or not b then return end
-        if mode == "all" then S.pvWinWAll = b.width; S.pvWinHAll = b.height
-        elseif mode == "single" then S.pvWinWOne = b.width; S.pvWinHOne = b.height
-        elseif mode == "static" then S.pvWinWSta = b.width; S.pvWinHSta = b.height
-        end
-    end
-
-    -- Get saved size for current mode, or fallback to calcPreviewSize
-    local function getWinSize()
-        local w, h = 0, 0
-        if S.previewMode == "all" then w = S.pvWinWAll; h = S.pvWinHAll
-        elseif S.previewMode == "single" then w = S.pvWinWOne; h = S.pvWinHOne
-        elseif S.previewMode == "static" then w = S.pvWinWSta; h = S.pvWinHSta
-        end
-        if w > 0 and h > 0 then return w, h end
-        -- No saved size: use content fit (Sta defaults to 200x200)
-        if S.previewMode == "static" then return 200, 200 end
-        local cw, ch = calcPreviewSize()
-        return math.max(cw, 120), math.max(ch, 40)
-    end
-
-    -- Calculate initial canvas size from saved window size
-    local pvWidth, pvHeight = getWinSize()
-    -- Canvas is smaller than window (buttons/decorations), but we approximate
     pvWidth = math.max(pvWidth, 120)
     pvHeight = math.max(pvHeight, 40)
 
     previewDlg = Dialog{
         title = "AniPhallow (" .. S.currentPreset .. ")",
         onclose = function()
-            saveBoundsForMode(S.previewMode)
             if previewTimer then pcall(function() previewTimer:stop() end) end
             if pvRefreshTimer then pcall(function() pvRefreshTimer:stop() end) end
             previewTimer = nil
@@ -1404,8 +1361,6 @@ openPreviewWindow = function()
         id = "pvToggleMode",
         text = getModeLabel(),
         onclick = function()
-            -- Save current bounds before switching
-            saveBoundsForMode(S.previewMode)
             if S.previewMode == "all" then
                 S.previewMode = "single"
                 if #S.animNames > 0 then
@@ -1418,9 +1373,21 @@ openPreviewWindow = function()
             else
                 S.previewMode = "all"
             end
-            -- Close and reopen with new mode's saved size
+            -- Update button label, anim name visibility, Fit enabled state
-            pcall(function() previewDlg:close() end)
+            pcall(function()
-            openPreviewWindow()
+                previewDlg:modify{ id = "pvToggleMode", text = getModeLabel() }
+                previewDlg:modify{ id = "pvAnimName", visible = (S.previewMode == "single") }
+                previewDlg:modify{ id = "pvFit", enabled = (S.previewMode ~= "static") }
+                if S.previewMode == "single" then
+                    local name = ""
+                    if S.previewSingleIdx >= 1 and S.previewSingleIdx <= #S.animNames then
+                        name = S.animNames[S.previewSingleIdx]
+                    end
+                    previewDlg:modify{ id = "pvAnimName", text = name }
+                end
+                previewDlg:repaint()
+            end)
+            saveAll()
         end
     }
 
@@ -1430,10 +1397,6 @@ openPreviewWindow = function()
         enabled = (S.previewMode ~= "static"),
         onclick = function()
             if S.previewMode == "static" then return end
-            -- Clear saved size so it recalculates from content
-            if S.previewMode == "all" then S.pvWinWAll = 0; S.pvWinHAll = 0
-            elseif S.previewMode == "single" then S.pvWinWOne = 0; S.pvWinHOne = 0
-            end
             pcall(function() previewDlg:close() end)
             openPreviewWindow()
         end