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Changelog

All notable changes to MaxPane will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[1.5.2] - 2026-03-04

Fixed

  • Crash when capturing Docker or MaxPane itself — Added ancestor guard in DoCapture() that rejects any window in MaxPane's parent chain, preventing circular reparenting crash. Docker and MaxPane are also filtered from the Open Windows menu. (#2, #4)
  • MIDI Editor survives project tab switches — New dynamicTitle mechanism stores a stable search prefix ("MIDI take:") instead of the exact window title. CheckAlive automatically recaptures the MIDI Editor when REAPER opens a new one after project switch or restart. (#3)
  • was_visible not cleared on close — Added was_visible=0 in WM_DESTROY handler as safety net for all window destruction paths. "Close Container" menu now calls Toggle() instead of Shutdown() directly. (#5)
  • Visual glitches — Hide close button on narrow tabs (< 60px); splitter hover timer now uses full hit testing; hover state cleared when context menu closes; adaptive text color (black on bright tab colors like yellow/cyan). (#7)
  • Toolbar rendering and docking in MaxPane — Toolbars can now be properly captured and displayed. Removed toolbar filter from FindWindowEnumProc. (#6)
  • Workspace switching: stale windows floating after restart — Windows from previous workspaces (toolbars, Actions, FX Browser, ReaImGui scripts) no longer appear as floating windows after switching workspaces and restarting REAPER. State-specific cleanup: double-toggle for state=0 windows, ShowWindow fallback for stubborn HWNDs, skip-toggle for script actions (state=-1). (#6)
  • Toolbar icons disappearing on background click — Subclassed captured toolbar windows to block REAPER's internal drag-to-undock behavior. Clicking and holding on toolbar background no longer causes icons to vanish. (#6)
  • Auto-detect toggle action — LookupToggleAction now auto-detects the REAPER toggle action ID for any window title (toolbars + known windows), ensuring proper state management for windows captured via Open Windows menu.

[1.5.1] - 2026-03-03

Fixed

  • macOS dark mode support — Pane background color now adapts to macOS dark/light appearance. Reparented windows (Track Manager, Routing Matrix, etc.) no longer show a light grey background when REAPER's dark mode is enabled. (#1)

[1.5.0] - 2026-03-03

Added

  • Solo/maximize pane — Temporarily expand any pane to fill the entire container. Toggle via context menu (Solo Pane / Exit Solo). Full tree snapshot is saved and restored when exiting solo mode.
  • Tab reorder within pane — Drag tabs left/right within the same pane to rearrange their order. Visual insertion indicator shows the drop position.
  • Splitter double-click reset — Double-click any splitter bar to reset its ratio to 50/50.
  • Keyboard shortcuts via REAPER actions — Five new actions registered in REAPER's Actions dialog, bindable to any key:
    • MaxPane: Next Tab
    • MaxPane: Previous Tab
    • MaxPane: Next Pane
    • MaxPane: Previous Pane
    • MaxPane: Solo Toggle

Changed

  • TabEntry owned storage — All string fields (name, searchTitle, actionCmd) are now owned char[] arrays instead of const char* pointers. Eliminates dangling pointer risk after tab moves/copies and removes the FixTabPointers() workaround.
  • ShiftTabsLeft helper — Extracted repeated tab-shift-and-clear pattern into a single function, used by CloseTab, MoveTab, and CheckAlive.
  • InvalidateRect(…, FALSE) everywhere — Semantically correct now that WM_ERASEBKGND is handled; avoids unnecessary erase flicker.

Fixed

  • Open Windows menu validation — Added IsWindow() check before using HWND from the open windows list, preventing crashes from stale window handles.

Note

  • Windows and Linux builds are included but have not been tested. Please report any issues at GitHub Issues.

[1.4.0] - 2026-03-03

Added

  • Region Render Matrix added to known windows (action 41888).
  • Cross-platform support — Windows x64 and Linux x86_64 builds now compile and are included in releases alongside macOS.
  • platform.h — Central platform abstraction header replacing 5 scattered #ifdef _WIN32 blocks.
  • CreateMaxPaneDialog() — Portable dialog creation helper (native CreateDialogIndirectParam on Windows, SWELL_CreateDialog on macOS/Linux).

Fixed

  • Windows compilation — bridged GWLP_USERDATA/SetWindowLongPtr (Win64 names) and replaced SWELL-only SWELL_CreateDialog with portable helper.
  • Linux compilation — suppressed SWELL min/max macro conflict with STL via WDL_NO_DEFINE_MINMAX.
  • Linker error on Windows/Linux — ForceViewLayoutAndDisplay() now has an inline no-op for non-macOS platforms (Cocoa code is macOS-only).

Changed

  • Known windows reorganized into logical groups (Mixing & Routing, Browsing & Media, Regions, Editing, Monitoring, Instruments).
  • Removed SWELL_PROVIDED_BY_APP from CMake global definitions — now set per-platform in platform.h.
  • Removed CMake get_target_property/list(REMOVE_ITEM) hack for Windows.

Removed

  • MIDI Editor removed from known windows — cannot be toggled without an active MIDI item in the session.

[1.3.0] - 2026-03-03

Changed

  • Renamed project: ReDockIt → MaxPane — all source, docs, CMake, actions, ExtState keys, RPP chunk tags updated.

Added

  • Diagonal grid lines in empty panes — subtle 45° lines on the pane background, disappear when a window is captured.

Fixed

  • Pane background color — captured windows (WS_CHILD) have no own background and inherited the parent's dark color. Fixed by setting COLOR_PANE_BG = RGB(172,172,172) as a neutral light gray.
  • DoRelease toggle for Actions window — closing the Actions tab via [x] left REAPER's toggle state on (checkmark stayed). Root cause: SWELL destroys the NSWindow when a window becomes WS_CHILD, so g_Main_OnCommand couldn't find the window and opened a new one. Fix: SetParent(nullptr) to restore the NSWindow before toggling.
  • Hint text color — "Click header to assign a window" was white on light gray after the background color fix. Changed to RGB(80,80,80).

[1.2.0] - 2026-03-02

Added

  • Pane menu button (▼) — 16 px button at the right edge of every tab bar. Left-click opens the pane context menu (same as right-click). Hit-test returns -2; hover highlights the button.
  • CalcTabBarLayout shared helper — single source of truth for tab geometry used by DrawTabBar, TabHitTest, and IsOnTabCloseButton.
  • GetTabRect helper — returns the screen rect for a given tab index; used for targeted invalidation on color change.
  • ExpandRect static helper (both container.cpp and container_input.cpp) — in-place RECT union, skips empty src/dst to prevent dirty-rect corruption.

Changed

  • Targeted InvalidateRect — hover/drag operations now invalidate only the affected rect instead of the full window:
    • Splitter hover: union of old + new splitter rect
    • Tab/menu-button hover: union of old + new item rect via GetTabRect / inline button rect
    • Drag highlight change: union of old + new highlight pane rect
    • Drag cancel/end: source tab bar + old highlight pane rect
    • Tab color change: only that tab's rect via GetTabRect
    • Timer hover timeout: cached old hover rects only
  • Tab area now reserves PANE_MENU_BTN_WIDTH (16 px) on the right for the menu button; tabs shrink accordingly.

Fixed

  • TabHitTest x-bounds regression — the menu-button check (x >= paneRect.right - 16) was firing for clicks outside the pane's x range (e.g. in the adjacent right-side pane), causing the pane context menu to appear instead of tab interactions. Fix: check x < paneRect.left || x >= paneRect.right before the menu-button test.
  • ExpandRect now guards against empty src rect ({0,0,0,0}) in both call-sites, preventing the dirty rect from expanding into origin unnecessarily.

Removed

  • Scroll arrows (< / >) for tab overflow — tabs shrink when a pane is narrow (original behaviour). m_tabScrollOffset, TAB_SCROLL_ARROW_WIDTH, TAB_OVERFLOW_THRESHOLD removed.

[1.1.0] - 2026-03-02

Added

  • Splitter hover highlights (white bar on mouseover)
  • Tab hover highlights (lighten effect on mouseover)
  • Per-project state persistence via RPP files (project_config_extension_t)
  • StateAccessor abstraction for polymorphic state I/O (global, project, RPP)

Fixed

  • Workspace switch rendering: blank/artifact windows (e.g. Routing Matrix) after switching back
  • Frameless floating windows when closing tabs via [x]
  • Windows reappearing floating after REAPER restart despite being closed
  • Shutdown lifecycle: proper toggle state check, reparent-before-toggle sequence
  • Quit interception via hookcommand for reliable state save on macOS/Windows
  • RepositionAll repaint: SWP_FRAMECHANGED + InvalidateRect after pane resize

Changed

  • Simplified to global docker model (removed per-project visibility switching)
  • RPP state I/O now uses synchronous project_config_extension_t (replaced deferred timer)
  • LoadWorkspace uses ReleaseAll(false) for smoother workspace transitions
  • DoCapture forces frame recalculation via SWP_FRAMECHANGED

[1.0.1] - 2026-03-01

Fixed

  • Startup deadlock: REAPER could hang when loading a project with MaxPane docked. The capture queue now defers Main_OnCommand calls during LoadState() to avoid calling REAPER APIs while the project is still loading.

Changed

  • Replaced raw new/delete with std::unique_ptr for safer resource management
  • Replaced all strncpy calls with safe_strncpy helper for consistent null-termination
  • Extracted magic numbers (colors, geometry, timing) into named constants in config.h
  • Merged duplicate FindWindowEnumProc/FindChildWindowEnumProc into single function
  • Debug logging is now conditional on CMAKE_BUILD_TYPE=Debug (no longer always enabled)
  • Added -Wshadow and -Wconversion compiler warnings

Removed

  • Dead code: unused BuildLists() and IsAnyCaptured() methods

[1.0.0] - 2025-03-01

Added

  • Native C++ REAPER extension (no script dependencies)
  • Binary split tree layout engine with up to 16 panes
  • Tabbed window management with drag-and-drop between panes
  • 14 known REAPER windows with one-click capture
  • Arbitrary window capture (including ReaImGui scripts)
  • Dock frame detection for ReaImGui windows
  • Async capture queue with retry logic
  • Named workspaces (save/restore complete layouts)
  • Favorites system with persistent action command strings
  • Tab color palette (8 colors)
  • 5 built-in layout presets
  • Auto-open on REAPER startup (configurable)
  • Full state persistence via REAPER ExtState
  • Dockable container (integrates with REAPER's docker system)
  • Context menus for panes and tabs
  • Capture-by-click mode
  • Conditional debug logging (Debug builds only)
  • Cross-platform architecture via WDL/SWELL