SpaceCadetPinball/SpaceCadetPinball/imgui_tables.cpp

// dear imgui, v1.89.2 WIP
// (tables and columns code)

/*

Index of this file:

// [SECTION] Commentary
// [SECTION] Header mess
// [SECTION] Tables: Main code
// [SECTION] Tables: Simple accessors
// [SECTION] Tables: Row changes
// [SECTION] Tables: Columns changes
// [SECTION] Tables: Columns width management
// [SECTION] Tables: Drawing
// [SECTION] Tables: Sorting
// [SECTION] Tables: Headers
// [SECTION] Tables: Context Menu
// [SECTION] Tables: Settings (.ini data)
// [SECTION] Tables: Garbage Collection
// [SECTION] Tables: Debugging
// [SECTION] Columns, BeginColumns, EndColumns, etc.

*/

// Navigating this file:
// - In Visual Studio IDE: CTRL+comma ("Edit.GoToAll") can follow symbols in comments, whereas CTRL+F12 ("Edit.GoToImplementation") cannot.
// - With Visual Assist installed: ALT+G ("VAssistX.GoToImplementation") can also follow symbols in comments.

//-----------------------------------------------------------------------------
// [SECTION] Commentary
//-----------------------------------------------------------------------------

//-----------------------------------------------------------------------------
// Typical tables call flow: (root level is generally public API):
//-----------------------------------------------------------------------------
// - BeginTable()                               user begin into a table
//    | BeginChild()                            - (if ScrollX/ScrollY is set)
//    | TableBeginInitMemory()                  - first time table is used
//    | TableResetSettings()                    - on settings reset
//    | TableLoadSettings()                     - on settings load
//    | TableBeginApplyRequests()               - apply queued resizing/reordering/hiding requests
//    | - TableSetColumnWidth()                 - apply resizing width (for mouse resize, often requested by previous frame)
//    |    - TableUpdateColumnsWeightFromWidth()- recompute columns weights (of stretch columns) from their respective width
// - TableSetupColumn()                         user submit columns details (optional)
// - TableSetupScrollFreeze()                   user submit scroll freeze information (optional)
//-----------------------------------------------------------------------------
// - TableUpdateLayout() [Internal]             followup to BeginTable(): setup everything: widths, columns positions, clipping rectangles. Automatically called by the FIRST call to TableNextRow() or TableHeadersRow().
//    | TableSetupDrawChannels()                - setup ImDrawList channels
//    | TableUpdateBorders()                    - detect hovering columns for resize, ahead of contents submission
//    | TableDrawContextMenu()                  - draw right-click context menu
//-----------------------------------------------------------------------------
// - TableHeadersRow() or TableHeader()         user submit a headers row (optional)
//    | TableSortSpecsClickColumn()             - when left-clicked: alter sort order and sort direction
//    | TableOpenContextMenu()                  - when right-clicked: trigger opening of the default context menu
// - TableGetSortSpecs()                        user queries updated sort specs (optional, generally after submitting headers)
// - TableNextRow()                             user begin into a new row (also automatically called by TableHeadersRow())
//    | TableEndRow()                           - finish existing row
//    | TableBeginRow()                         - add a new row
// - TableSetColumnIndex() / TableNextColumn()  user begin into a cell
//    | TableEndCell()                          - close existing column/cell
//    | TableBeginCell()                        - enter into current column/cell
// - [...]                                      user emit contents
//-----------------------------------------------------------------------------
// - EndTable()                                 user ends the table
//    | TableDrawBorders()                      - draw outer borders, inner vertical borders
//    | TableMergeDrawChannels()                - merge draw channels if clipping isn't required
//    | EndChild()                              - (if ScrollX/ScrollY is set)
//-----------------------------------------------------------------------------

//-----------------------------------------------------------------------------
// TABLE SIZING
//-----------------------------------------------------------------------------
// (Read carefully because this is subtle but it does make sense!)
//-----------------------------------------------------------------------------
// About 'outer_size':
// Its meaning needs to differ slightly depending on if we are using ScrollX/ScrollY flags.
// Default value is ImVec2(0.0f, 0.0f).
//   X
//   - outer_size.x <= 0.0f  ->  Right-align from window/work-rect right-most edge. With -FLT_MIN or 0.0f will align exactly on right-most edge.
//   - outer_size.x  > 0.0f  ->  Set Fixed width.
//   Y with ScrollX/ScrollY disabled: we output table directly in current window
//   - outer_size.y  < 0.0f  ->  Bottom-align (but will auto extend, unless _NoHostExtendY is set). Not meaningful is parent window can vertically scroll.
//   - outer_size.y  = 0.0f  ->  No minimum height (but will auto extend, unless _NoHostExtendY is set)
//   - outer_size.y  > 0.0f  ->  Set Minimum height (but will auto extend, unless _NoHostExtenY is set)
//   Y with ScrollX/ScrollY enabled: using a child window for scrolling
//   - outer_size.y  < 0.0f  ->  Bottom-align. Not meaningful is parent window can vertically scroll.
//   - outer_size.y  = 0.0f  ->  Bottom-align, consistent with BeginChild(). Not recommended unless table is last item in parent window.
//   - outer_size.y  > 0.0f  ->  Set Exact height. Recommended when using Scrolling on any axis.
//-----------------------------------------------------------------------------
// Outer size is also affected by the NoHostExtendX/NoHostExtendY flags.
// Important to that note how the two flags have slightly different behaviors!
//   - ImGuiTableFlags_NoHostExtendX -> Make outer width auto-fit to columns (overriding outer_size.x value). Only available when ScrollX/ScrollY are disabled and Stretch columns are not used.
//   - ImGuiTableFlags_NoHostExtendY -> Make outer height stop exactly at outer_size.y (prevent auto-extending table past the limit). Only available when ScrollX/ScrollY is disabled. Data below the limit will be clipped and not visible.
// In theory ImGuiTableFlags_NoHostExtendY could be the default and any non-scrolling tables with outer_size.y != 0.0f would use exact height.
// This would be consistent but perhaps less useful and more confusing (as vertically clipped items are not easily noticeable)
//-----------------------------------------------------------------------------
// About 'inner_width':
//   With ScrollX disabled:
//   - inner_width          ->  *ignored*
//   With ScrollX enabled:
//   - inner_width  < 0.0f  ->  *illegal* fit in known width (right align from outer_size.x) <-- weird
//   - inner_width  = 0.0f  ->  fit in outer_width: Fixed size columns will take space they need (if avail, otherwise shrink down), Stretch columns becomes Fixed columns.
//   - inner_width  > 0.0f  ->  override scrolling width, generally to be larger than outer_size.x. Fixed column take space they need (if avail, otherwise shrink down), Stretch columns share remaining space!
//-----------------------------------------------------------------------------
// Details:
// - If you want to use Stretch columns with ScrollX, you generally need to specify 'inner_width' otherwise the concept
//   of "available space" doesn't make sense.
// - Even if not really useful, we allow 'inner_width < outer_size.x' for consistency and to facilitate understanding
//   of what the value does.
//-----------------------------------------------------------------------------

//-----------------------------------------------------------------------------
// COLUMNS SIZING POLICIES
//-----------------------------------------------------------------------------
// About overriding column sizing policy and width/weight with TableSetupColumn():
// We use a default parameter of 'init_width_or_weight == -1'.
//   - with ImGuiTableColumnFlags_WidthFixed,    init_width  <= 0 (default)  --> width is automatic
//   - with ImGuiTableColumnFlags_WidthFixed,    init_width  >  0 (explicit) --> width is custom
//   - with ImGuiTableColumnFlags_WidthStretch,  init_weight <= 0 (default)  --> weight is 1.0f
//   - with ImGuiTableColumnFlags_WidthStretch,  init_weight >  0 (explicit) --> weight is custom
// Widths are specified _without_ CellPadding. If you specify a width of 100.0f, the column will be cover (100.0f + Padding * 2.0f)
// and you can fit a 100.0f wide item in it without clipping and with full padding.
//-----------------------------------------------------------------------------
// About default sizing policy (if you don't specify a ImGuiTableColumnFlags_WidthXXXX flag)
//   - with Table policy ImGuiTableFlags_SizingFixedFit      --> default Column policy is ImGuiTableColumnFlags_WidthFixed, default Width is equal to contents width
//   - with Table policy ImGuiTableFlags_SizingFixedSame     --> default Column policy is ImGuiTableColumnFlags_WidthFixed, default Width is max of all contents width
//   - with Table policy ImGuiTableFlags_SizingStretchSame   --> default Column policy is ImGuiTableColumnFlags_WidthStretch, default Weight is 1.0f
//   - with Table policy ImGuiTableFlags_SizingStretchWeight --> default Column policy is ImGuiTableColumnFlags_WidthStretch, default Weight is proportional to contents
// Default Width and default Weight can be overridden when calling TableSetupColumn().
//-----------------------------------------------------------------------------
// About mixing Fixed/Auto and Stretch columns together:
//   - the typical use of mixing sizing policies is: any number of LEADING Fixed columns, followed by one or two TRAILING Stretch columns.
//   - using mixed policies with ScrollX does not make much sense, as using Stretch columns with ScrollX does not make much sense in the first place!
//     that is, unless 'inner_width' is passed to BeginTable() to explicitly provide a total width to layout columns in.
//   - when using ImGuiTableFlags_SizingFixedSame with mixed columns, only the Fixed/Auto columns will match their widths to the width of the maximum contents.
//   - when using ImGuiTableFlags_SizingStretchSame with mixed columns, only the Stretch columns will match their weight/widths.
//-----------------------------------------------------------------------------
// About using column width:
// If a column is manual resizable or has a width specified with TableSetupColumn():
//   - you may use GetContentRegionAvail().x to query the width available in a given column.
//   - right-side alignment features such as SetNextItemWidth(-x) or PushItemWidth(-x) will rely on this width.
// If the column is not resizable and has no width specified with TableSetupColumn():
//   - its width will be automatic and be set to the max of items submitted.
//   - therefore you generally cannot have ALL items of the columns use e.g. SetNextItemWidth(-FLT_MIN).
//   - but if the column has one or more items of known/fixed size, this will become the reference width used by SetNextItemWidth(-FLT_MIN).
//-----------------------------------------------------------------------------


//-----------------------------------------------------------------------------
// TABLES CLIPPING/CULLING
//-----------------------------------------------------------------------------
// About clipping/culling of Rows in Tables:
// - For large numbers of rows, it is recommended you use ImGuiListClipper to only submit visible rows.
//   ImGuiListClipper is reliant on the fact that rows are of equal height.
//   See 'Demo->Tables->Vertical Scrolling' or 'Demo->Tables->Advanced' for a demo of using the clipper.
// - Note that auto-resizing columns don't play well with using the clipper.
//   By default a table with _ScrollX but without _Resizable will have column auto-resize.
//   So, if you want to use the clipper, make sure to either enable _Resizable, either setup columns width explicitly with _WidthFixed.
//-----------------------------------------------------------------------------
// About clipping/culling of Columns in Tables:
// - Both TableSetColumnIndex() and TableNextColumn() return true when the column is visible or performing
//   width measurements. Otherwise, you may skip submitting the contents of a cell/column, BUT ONLY if you know
//   it is not going to contribute to row height.
//   In many situations, you may skip submitting contents for every column but one (e.g. the first one).
// - Case A: column is not hidden by user, and at least partially in sight (most common case).
// - Case B: column is clipped / out of sight (because of scrolling or parent ClipRect): TableNextColumn() return false as a hint but we still allow layout output.
// - Case C: column is hidden explicitly by the user (e.g. via the context menu, or _DefaultHide column flag, etc.).
//
//                        [A]         [B]          [C]
//  TableNextColumn():    true        false        false       -> [userland] when TableNextColumn() / TableSetColumnIndex() return false, user can skip submitting items but only if the column doesn't contribute to row height.
//          SkipItems:    false       false        true        -> [internal] when SkipItems is true, most widgets will early out if submitted, resulting is no layout output.
//           ClipRect:    normal      zero-width   zero-width  -> [internal] when ClipRect is zero, ItemAdd() will return false and most widgets will early out mid-way.
//  ImDrawList output:    normal      dummy        dummy       -> [internal] when using the dummy channel, ImDrawList submissions (if any) will be wasted (because cliprect is zero-width anyway).
//
// - We need to distinguish those cases because non-hidden columns that are clipped outside of scrolling bounds should still contribute their height to the row.
//   However, in the majority of cases, the contribution to row height is the same for all columns, or the tallest cells are known by the programmer.
//-----------------------------------------------------------------------------
// About clipping/culling of whole Tables:
// - Scrolling tables with a known outer size can be clipped earlier as BeginTable() will return false.
//-----------------------------------------------------------------------------

//-----------------------------------------------------------------------------
// [SECTION] Header mess
//-----------------------------------------------------------------------------

#if defined(_MSC_VER) && !defined(_CRT_SECURE_NO_WARNINGS)
#define _CRT_SECURE_NO_WARNINGS
#endif

#include "imgui.h"
#ifndef IMGUI_DISABLE

#ifndef IMGUI_DEFINE_MATH_OPERATORS
#define IMGUI_DEFINE_MATH_OPERATORS
#endif
#include "imgui_internal.h"

// System includes
#if defined(_MSC_VER) && _MSC_VER <= 1500 // MSVC 2008 or earlier
#include <stddef.h>     // intptr_t
#else
#include <stdint.h>     // intptr_t
#endif

// Visual Studio warnings
#ifdef _MSC_VER
#pragma warning (disable: 4127)     // condition expression is constant
#pragma warning (disable: 4996)     // 'This function or variable may be unsafe': strcpy, strdup, sprintf, vsnprintf, sscanf, fopen
#if defined(_MSC_VER) && _MSC_VER >= 1922 // MSVC 2019 16.2 or later
#pragma warning (disable: 5054)     // operator '|': deprecated between enumerations of different types
#endif
#pragma warning (disable: 26451)    // [Static Analyzer] Arithmetic overflow : Using operator 'xxx' on a 4 byte value and then casting the result to a 8 byte value. Cast the value to the wider type before calling operator 'xxx' to avoid overflow(io.2).
#pragma warning (disable: 26812)    // [Static Analyzer] The enum type 'xxx' is unscoped. Prefer 'enum class' over 'enum' (Enum.3).
#endif

// Clang/GCC warnings with -Weverything
#if defined(__clang__)
#if __has_warning("-Wunknown-warning-option")
#pragma clang diagnostic ignored "-Wunknown-warning-option"         // warning: unknown warning group 'xxx'                      // not all warnings are known by all Clang versions and they tend to be rename-happy.. so ignoring warnings triggers new warnings on some configuration. Great!
#endif
#pragma clang diagnostic ignored "-Wunknown-pragmas"                // warning: unknown warning group 'xxx'
#pragma clang diagnostic ignored "-Wold-style-cast"                 // warning: use of old-style cast                            // yes, they are more terse.
#pragma clang diagnostic ignored "-Wfloat-equal"                    // warning: comparing floating point with == or != is unsafe // storing and comparing against same constants (typically 0.0f) is ok.
#pragma clang diagnostic ignored "-Wformat-nonliteral"              // warning: format string is not a string literal            // passing non-literal to vsnformat(). yes, user passing incorrect format strings can crash the code.
#pragma clang diagnostic ignored "-Wsign-conversion"                // warning: implicit conversion changes signedness
#pragma clang diagnostic ignored "-Wzero-as-null-pointer-constant"  // warning: zero as null pointer constant                    // some standard header variations use #define NULL 0
#pragma clang diagnostic ignored "-Wdouble-promotion"               // warning: implicit conversion from 'float' to 'double' when passing argument to function  // using printf() is a misery with this as C++ va_arg ellipsis changes float to double.
#pragma clang diagnostic ignored "-Wenum-enum-conversion"           // warning: bitwise operation between different enumeration types ('XXXFlags_' and 'XXXFlagsPrivate_')
#pragma clang diagnostic ignored "-Wdeprecated-enum-enum-conversion"// warning: bitwise operation between different enumeration types ('XXXFlags_' and 'XXXFlagsPrivate_') is deprecated
#pragma clang diagnostic ignored "-Wimplicit-int-float-conversion"  // warning: implicit conversion from 'xxx' to 'float' may lose precision
#elif defined(__GNUC__)
#pragma GCC diagnostic ignored "-Wpragmas"                          // warning: unknown option after '#pragma GCC diagnostic' kind
#pragma GCC diagnostic ignored "-Wformat-nonliteral"                // warning: format not a string literal, format string not checked
#pragma GCC diagnostic ignored "-Wclass-memaccess"                  // [__GNUC__ >= 8] warning: 'memset/memcpy' clearing/writing an object of type 'xxxx' with no trivial copy-assignment; use assignment or value-initialization instead
#endif

//-----------------------------------------------------------------------------
// [SECTION] Tables: Main code
//-----------------------------------------------------------------------------
// - TableFixFlags() [Internal]
// - TableFindByID() [Internal]
// - BeginTable()
// - BeginTableEx() [Internal]
// - TableBeginInitMemory() [Internal]
// - TableBeginApplyRequests() [Internal]
// - TableSetupColumnFlags() [Internal]
// - TableUpdateLayout() [Internal]
// - TableUpdateBorders() [Internal]
// - EndTable()
// - TableSetupColumn()
// - TableSetupScrollFreeze()
//-----------------------------------------------------------------------------

// Configuration
static const int TABLE_DRAW_CHANNEL_BG0 = 0;
static const int TABLE_DRAW_CHANNEL_BG2_FROZEN = 1;
static const int TABLE_DRAW_CHANNEL_NOCLIP = 2;                     // When using ImGuiTableFlags_NoClip (this becomes the last visible channel)
static const float TABLE_BORDER_SIZE                     = 1.0f;    // FIXME-TABLE: Currently hard-coded because of clipping assumptions with outer borders rendering.
static const float TABLE_RESIZE_SEPARATOR_HALF_THICKNESS = 4.0f;    // Extend outside inner borders.
static const float TABLE_RESIZE_SEPARATOR_FEEDBACK_TIMER = 0.06f;   // Delay/timer before making the hover feedback (color+cursor) visible because tables/columns tends to be more cramped.

// Helper
inline ImGuiTableFlags TableFixFlags(ImGuiTableFlags flags, ImGuiWindow* outer_window)
{
    // Adjust flags: set default sizing policy
    if ((flags & ImGuiTableFlags_SizingMask_) == 0)
        flags |= ((flags & ImGuiTableFlags_ScrollX) || (outer_window->Flags & ImGuiWindowFlags_AlwaysAutoResize)) ? ImGuiTableFlags_SizingFixedFit : ImGuiTableFlags_SizingStretchSame;

    // Adjust flags: enable NoKeepColumnsVisible when using ImGuiTableFlags_SizingFixedSame
    if ((flags & ImGuiTableFlags_SizingMask_) == ImGuiTableFlags_SizingFixedSame)
        flags |= ImGuiTableFlags_NoKeepColumnsVisible;

    // Adjust flags: enforce borders when resizable
    if (flags & ImGuiTableFlags_Resizable)
        flags |= ImGuiTableFlags_BordersInnerV;

    // Adjust flags: disable NoHostExtendX/NoHostExtendY if we have any scrolling going on
    if (flags & (ImGuiTableFlags_ScrollX | ImGuiTableFlags_ScrollY))
        flags &= ~(ImGuiTableFlags_NoHostExtendX | ImGuiTableFlags_NoHostExtendY);

    // Adjust flags: NoBordersInBodyUntilResize takes priority over NoBordersInBody
    if (flags & ImGuiTableFlags_NoBordersInBodyUntilResize)
        flags &= ~ImGuiTableFlags_NoBordersInBody;

    // Adjust flags: disable saved settings if there's nothing to save
    if ((flags & (ImGuiTableFlags_Resizable | ImGuiTableFlags_Hideable | ImGuiTableFlags_Reorderable | ImGuiTableFlags_Sortable)) == 0)
        flags |= ImGuiTableFlags_NoSavedSettings;

    // Inherit _NoSavedSettings from top-level window (child windows always have _NoSavedSettings set)
    if (outer_window->RootWindow->Flags & ImGuiWindowFlags_NoSavedSettings)
        flags |= ImGuiTableFlags_NoSavedSettings;

    return flags;
}

ImGuiTable* ImGui::TableFindByID(ImGuiID id)
{
    ImGuiContext& g = *GImGui;
    return g.Tables.GetByKey(id);
}

// Read about "TABLE SIZING" at the top of this file.
bool    ImGui::BeginTable(const char* str_id, int columns_count, ImGuiTableFlags flags, const ImVec2& outer_size, float inner_width)
{
    ImGuiID id = GetID(str_id);
    return BeginTableEx(str_id, id, columns_count, flags, outer_size, inner_width);
}

bool    ImGui::BeginTableEx(const char* name, ImGuiID id, int columns_count, ImGuiTableFlags flags, const ImVec2& outer_size, float inner_width)
{
    ImGuiContext& g = *GImGui;
    ImGuiWindow* outer_window = GetCurrentWindow();
    if (outer_window->SkipItems) // Consistent with other tables + beneficial side effect that assert on miscalling EndTable() will be more visible.
        return false;

    // Sanity checks
    IM_ASSERT(columns_count > 0 && columns_count <= IMGUI_TABLE_MAX_COLUMNS && "Only 1..64 columns allowed!");
    if (flags & ImGuiTableFlags_ScrollX)
        IM_ASSERT(inner_width >= 0.0f);

    // If an outer size is specified ahead we will be able to early out when not visible. Exact clipping rules may evolve.
    const bool use_child_window = (flags & (ImGuiTableFlags_ScrollX | ImGuiTableFlags_ScrollY)) != 0;
    const ImVec2 avail_size = GetContentRegionAvail();
    ImVec2 actual_outer_size = CalcItemSize(outer_size, ImMax(avail_size.x, 1.0f), use_child_window ? ImMax(avail_size.y, 1.0f) : 0.0f);
    ImRect outer_rect(outer_window->DC.CursorPos, outer_window->DC.CursorPos + actual_outer_size);
    if (use_child_window && IsClippedEx(outer_rect, 0))
    {
        ItemSize(outer_rect);
        return false;
    }

    // Acquire storage for the table
    ImGuiTable* table = g.Tables.GetOrAddByKey(id);
    const int instance_no = (table->LastFrameActive != g.FrameCount) ? 0 : table->InstanceCurrent + 1;
    const ImGuiID instance_id = id + instance_no;
    const ImGuiTableFlags table_last_flags = table->Flags;
    if (instance_no > 0)
        IM_ASSERT(table->ColumnsCount == columns_count && "BeginTable(): Cannot change columns count mid-frame while preserving same ID");

    // Acquire temporary buffers
    const int table_idx = g.Tables.GetIndex(table);
    if (++g.TablesTempDataStacked > g.TablesTempData.Size)
        g.TablesTempData.resize(g.TablesTempDataStacked, ImGuiTableTempData());
    ImGuiTableTempData* temp_data = table->TempData = &g.TablesTempData[g.TablesTempDataStacked - 1];
    temp_data->TableIndex = table_idx;
    table->DrawSplitter = &table->TempData->DrawSplitter;
    table->DrawSplitter->Clear();

    // Fix flags
    table->IsDefaultSizingPolicy = (flags & ImGuiTableFlags_SizingMask_) == 0;
    flags = TableFixFlags(flags, outer_window);

    // Initialize
    table->ID = id;
    table->Flags = flags;
    table->InstanceCurrent = (ImS16)instance_no;
    table->LastFrameActive = g.FrameCount;
    table->OuterWindow = table->InnerWindow = outer_window;
    table->ColumnsCount = columns_count;
    table->IsLayoutLocked = false;
    table->InnerWidth = inner_width;
    temp_data->UserOuterSize = outer_size;
    if (instance_no > 0 && table->InstanceDataExtra.Size < instance_no)
        table->InstanceDataExtra.push_back(ImGuiTableInstanceData());

    // When not using a child window, WorkRect.Max will grow as we append contents.
    if (use_child_window)
    {
        // Ensure no vertical scrollbar appears if we only want horizontal one, to make flag consistent
        // (we have no other way to disable vertical scrollbar of a window while keeping the horizontal one showing)
        ImVec2 override_content_size(FLT_MAX, FLT_MAX);
        if ((flags & ImGuiTableFlags_ScrollX) && !(flags & ImGuiTableFlags_ScrollY))
            override_content_size.y = FLT_MIN;

        // Ensure specified width (when not specified, Stretched columns will act as if the width == OuterWidth and
        // never lead to any scrolling). We don't handle inner_width < 0.0f, we could potentially use it to right-align
        // based on the right side of the child window work rect, which would require knowing ahead if we are going to
        // have decoration taking horizontal spaces (typically a vertical scrollbar).
        if ((flags & ImGuiTableFlags_ScrollX) && inner_width > 0.0f)
            override_content_size.x = inner_width;

        if (override_content_size.x != FLT_MAX || override_content_size.y != FLT_MAX)
            SetNextWindowContentSize(ImVec2(override_content_size.x != FLT_MAX ? override_content_size.x : 0.0f, override_content_size.y != FLT_MAX ? override_content_size.y : 0.0f));

        // Reset scroll if we are reactivating it
        if ((table_last_flags & (ImGuiTableFlags_ScrollX | ImGuiTableFlags_ScrollY)) == 0)
            SetNextWindowScroll(ImVec2(0.0f, 0.0f));

        // Create scrolling region (without border and zero window padding)
        ImGuiWindowFlags child_flags = (flags & ImGuiTableFlags_ScrollX) ? ImGuiWindowFlags_HorizontalScrollbar : ImGuiWindowFlags_None;
        BeginChildEx(name, instance_id, outer_rect.GetSize(), false, child_flags);
        table->InnerWindow = g.CurrentWindow;
        table->WorkRect = table->InnerWindow->WorkRect;
        table->OuterRect = table->InnerWindow->Rect();
        table->InnerRect = table->InnerWindow->InnerRect;
        IM_ASSERT(table->InnerWindow->WindowPadding.x == 0.0f && table->InnerWindow->WindowPadding.y == 0.0f && table->InnerWindow->WindowBorderSize == 0.0f);

        // When using multiple instances, ensure they have the same amount of horizontal decorations (aka vertical scrollbar) so stretched columns can be aligned)
        if (instance_no == 0)
        {
            table->HasScrollbarYPrev = table->HasScrollbarYCurr;
            table->HasScrollbarYCurr = false;
        }
        table->HasScrollbarYCurr |= (table->InnerWindow->ScrollMax.y > 0.0f);
    }
    else
    {
        // For non-scrolling tables, WorkRect == OuterRect == InnerRect.
        // But at this point we do NOT have a correct value for .Max.y (unless a height has been explicitly passed in). It will only be updated in EndTable().
        table->WorkRect = table->OuterRect = table->InnerRect = outer_rect;
    }

    // Push a standardized ID for both child-using and not-child-using tables
    PushOverrideID(instance_id);

    // Backup a copy of host window members we will modify
    ImGuiWindow* inner_window = table->InnerWindow;
    table->HostIndentX = inner_window->DC.Indent.x;
    table->HostClipRect = inner_window->ClipRect;
    table->HostSkipItems = inner_window->SkipItems;
    temp_data->HostBackupWorkRect = inner_window->WorkRect;
    temp_data->HostBackupParentWorkRect = inner_window->ParentWorkRect;
    temp_data->HostBackupColumnsOffset = outer_window->DC.ColumnsOffset;
    temp_data->HostBackupPrevLineSize = inner_window->DC.PrevLineSize;
    temp_data->HostBackupCurrLineSize = inner_window->DC.CurrLineSize;
    temp_data->HostBackupCursorMaxPos = inner_window->DC.CursorMaxPos;
    temp_data->HostBackupItemWidth = outer_window->DC.ItemWidth;
    temp_data->HostBackupItemWidthStackSize = outer_window->DC.ItemWidthStack.Size;
    inner_window->DC.PrevLineSize = inner_window->DC.CurrLineSize = ImVec2(0.0f, 0.0f);

    // Padding and Spacing
    // - None               ........Content..... Pad .....Content........
    // - PadOuter           | Pad ..Content..... Pad .....Content.. Pad |
    // - PadInner           ........Content.. Pad | Pad ..Content........
    // - PadOuter+PadInner  | Pad ..Content.. Pad | Pad ..Content.. Pad |
    const bool pad_outer_x = (flags & ImGuiTableFlags_NoPadOuterX) ? false : (flags & ImGuiTableFlags_PadOuterX) ? true : (flags & ImGuiTableFlags_BordersOuterV) != 0;
    const bool pad_inner_x = (flags & ImGuiTableFlags_NoPadInnerX) ? false : true;
    const float inner_spacing_for_border = (flags & ImGuiTableFlags_BordersInnerV) ? TABLE_BORDER_SIZE : 0.0f;
    const float inner_spacing_explicit = (pad_inner_x && (flags & ImGuiTableFlags_BordersInnerV) == 0) ? g.Style.CellPadding.x : 0.0f;
    const float inner_padding_explicit = (pad_inner_x && (flags & ImGuiTableFlags_BordersInnerV) != 0) ? g.Style.CellPadding.x : 0.0f;
    table->CellSpacingX1 = inner_spacing_explicit + inner_spacing_for_border;
    table->CellSpacingX2 = inner_spacing_explicit;
    table->CellPaddingX = inner_padding_explicit;
    table->CellPaddingY = g.Style.CellPadding.y;

    const float outer_padding_for_border = (flags & ImGuiTableFlags_BordersOuterV) ? TABLE_BORDER_SIZE : 0.0f;
    const float outer_padding_explicit = pad_outer_x ? g.Style.CellPadding.x : 0.0f;
    table->OuterPaddingX = (outer_padding_for_border + outer_padding_explicit) - table->CellPaddingX;

    table->CurrentColumn = -1;
    table->CurrentRow = -1;
    table->RowBgColorCounter = 0;
    table->LastRowFlags = ImGuiTableRowFlags_None;
    table->InnerClipRect = (inner_window == outer_window) ? table->WorkRect : inner_window->ClipRect;
    table->InnerClipRect.ClipWith(table->WorkRect);     // We need this to honor inner_width
    table->InnerClipRect.ClipWithFull(table->HostClipRect);
    table->InnerClipRect.Max.y = (flags & ImGuiTableFlags_NoHostExtendY) ? ImMin(table->InnerClipRect.Max.y, inner_window->WorkRect.Max.y) : inner_window->ClipRect.Max.y;

    table->RowPosY1 = table->RowPosY2 = table->WorkRect.Min.y; // This is needed somehow
    table->RowTextBaseline = 0.0f; // This will be cleared again by TableBeginRow()
    table->FreezeRowsRequest = table->FreezeRowsCount = 0; // This will be setup by TableSetupScrollFreeze(), if any
    table->FreezeColumnsRequest = table->FreezeColumnsCount = 0;
    table->IsUnfrozenRows = true;
    table->DeclColumnsCount = 0;

    // Using opaque colors facilitate overlapping elements of the grid
    table->BorderColorStrong = GetColorU32(ImGuiCol_TableBorderStrong);
    table->BorderColorLight = GetColorU32(ImGuiCol_TableBorderLight);

    // Make table current
    g.CurrentTable = table;
    outer_window->DC.CurrentTableIdx = table_idx;
    if (inner_window != outer_window) // So EndChild() within the inner window can restore the table properly.
        inner_window->DC.CurrentTableIdx = table_idx;

    if ((table_last_flags & ImGuiTableFlags_Reorderable) && (flags & ImGuiTableFlags_Reorderable) == 0)
        table->IsResetDisplayOrderRequest = true;

    // Mark as used
    if (table_idx >= g.TablesLastTimeActive.Size)
        g.TablesLastTimeActive.resize(table_idx + 1, -1.0f);
    g.TablesLastTimeActive[table_idx] = (float)g.Time;
    temp_data->LastTimeActive = (float)g.Time;
    table->MemoryCompacted = false;

    // Setup memory buffer (clear data if columns count changed)
    ImGuiTableColumn* old_columns_to_preserve = NULL;
    void* old_columns_raw_data = NULL;
    const int old_columns_count = table->Columns.size();
    if (old_columns_count != 0 && old_columns_count != columns_count)
    {
        // Attempt to preserve width on column count change (#4046)
        old_columns_to_preserve = table->Columns.Data;
        old_columns_raw_data = table->RawData;
        table->RawData = NULL;
    }
    if (table->RawData == NULL)
    {
        TableBeginInitMemory(table, columns_count);
        table->IsInitializing = table->IsSettingsRequestLoad = true;
    }
    if (table->IsResetAllRequest)
        TableResetSettings(table);
    if (table->IsInitializing)
    {
        // Initialize
        table->SettingsOffset = -1;
        table->IsSortSpecsDirty = true;
        table->InstanceInteracted = -1;
        table->ContextPopupColumn = -1;
        table->ReorderColumn = table->ResizedColumn = table->LastResizedColumn = -1;
        table->AutoFitSingleColumn = -1;
        table->HoveredColumnBody = table->HoveredColumnBorder = -1;
        for (int n = 0; n < columns_count; n++)
        {
            ImGuiTableColumn* column = &table->Columns[n];
            if (old_columns_to_preserve && n < old_columns_count)
            {
                // FIXME: We don't attempt to preserve column order in this path.
                *column = old_columns_to_preserve[n];
            }
            else
            {
                float width_auto = column->WidthAuto;
                *column = ImGuiTableColumn();
                column->WidthAuto = width_auto;
                column->IsPreserveWidthAuto = true; // Preserve WidthAuto when reinitializing a live table: not technically necessary but remove a visible flicker
                column->IsEnabled = column->IsUserEnabled = column->IsUserEnabledNextFrame = true;
            }
            column->DisplayOrder = table->DisplayOrderToIndex[n] = (ImGuiTableColumnIdx)n;
        }
    }
    if (old_columns_raw_data)
        IM_FREE(old_columns_raw_data);

    // Load settings
    if (table->IsSettingsRequestLoad)
        TableLoadSettings(table);

    // Handle DPI/font resize
    // This is designed to facilitate DPI changes with the assumption that e.g. style.CellPadding has been scaled as well.
    // It will also react to changing fonts with mixed results. It doesn't need to be perfect but merely provide a decent transition.
    // FIXME-DPI: Provide consistent standards for reference size. Perhaps using g.CurrentDpiScale would be more self explanatory.
    // This is will lead us to non-rounded WidthRequest in columns, which should work but is a poorly tested path.
    const float new_ref_scale_unit = g.FontSize; // g.Font->GetCharAdvance('A') ?
    if (table->RefScale != 0.0f && table->RefScale != new_ref_scale_unit)
    {
        const float scale_factor = new_ref_scale_unit / table->RefScale;
        //IMGUI_DEBUG_PRINT("[table] %08X RefScaleUnit %.3f -> %.3f, scaling width by %.3f\n", table->ID, table->RefScaleUnit, new_ref_scale_unit, scale_factor);
        for (int n = 0; n < columns_count; n++)
            table->Columns[n].WidthRequest = table->Columns[n].WidthRequest * scale_factor;
    }
    table->RefScale = new_ref_scale_unit;

    // Disable output until user calls TableNextRow() or TableNextColumn() leading to the TableUpdateLayout() call..
    // This is not strictly necessary but will reduce cases were "out of table" output will be misleading to the user.
    // Because we cannot safely assert in EndTable() when no rows have been created, this seems like our best option.
    inner_window->SkipItems = true;

    // Clear names
    // At this point the ->NameOffset field of each column will be invalid until TableUpdateLayout() or the first call to TableSetupColumn()
    if (table->ColumnsNames.Buf.Size > 0)
        table->ColumnsNames.Buf.resize(0);

    // Apply queued resizing/reordering/hiding requests
    TableBeginApplyRequests(table);

    return true;
}

// For reference, the average total _allocation count_ for a table is:
// + 0 (for ImGuiTable instance, we are pooling allocations in g.Tables)
// + 1 (for table->RawData allocated below)
// + 1 (for table->ColumnsNames, if names are used)
// Shared allocations per number of nested tables
// + 1 (for table->Splitter._Channels)
// + 2 * active_channels_count (for ImDrawCmd and ImDrawIdx buffers inside channels)
// Where active_channels_count is variable but often == columns_count or columns_count + 1, see TableSetupDrawChannels() for details.
// Unused channels don't perform their +2 allocations.
void ImGui::TableBeginInitMemory(ImGuiTable* table, int columns_count)
{
    // Allocate single buffer for our arrays
    ImSpanAllocator<3> span_allocator;
    span_allocator.Reserve(0, columns_count * sizeof(ImGuiTableColumn));
    span_allocator.Reserve(1, columns_count * sizeof(ImGuiTableColumnIdx));
    span_allocator.Reserve(2, columns_count * sizeof(ImGuiTableCellData), 4);
    table->RawData = IM_ALLOC(span_allocator.GetArenaSizeInBytes());
    memset(table->RawData, 0, span_allocator.GetArenaSizeInBytes());
    span_allocator.SetArenaBasePtr(table->RawData);
    span_allocator.GetSpan(0, &table->Columns);
    span_allocator.GetSpan(1, &table->DisplayOrderToIndex);
    span_allocator.GetSpan(2, &table->RowCellData);
}

// Apply queued resizing/reordering/hiding requests
void ImGui::TableBeginApplyRequests(ImGuiTable* table)
{
    // Handle resizing request
    // (We process this at the first TableBegin of the frame)
    // FIXME-TABLE: Contains columns if our work area doesn't allow for scrolling?
    if (table->InstanceCurrent == 0)
    {
        if (table->ResizedColumn != -1 && table->ResizedColumnNextWidth != FLT_MAX)
            TableSetColumnWidth(table->ResizedColumn, table->ResizedColumnNextWidth);
        table->LastResizedColumn = table->ResizedColumn;
        table->ResizedColumnNextWidth = FLT_MAX;
        table->ResizedColumn = -1;

        // Process auto-fit for single column, which is a special case for stretch columns and fixed columns with FixedSame policy.
        // FIXME-TABLE: Would be nice to redistribute available stretch space accordingly to other weights, instead of giving it all to siblings.
        if (table->AutoFitSingleColumn != -1)
        {
            TableSetColumnWidth(table->AutoFitSingleColumn, table->Columns[table->AutoFitSingleColumn].WidthAuto);
            table->AutoFitSingleColumn = -1;
        }
    }

    // Handle reordering request
    // Note: we don't clear ReorderColumn after handling the request.
    if (table->InstanceCurrent == 0)
    {
        if (table->HeldHeaderColumn == -1 && table->ReorderColumn != -1)
            table->ReorderColumn = -1;
        table->HeldHeaderColumn = -1;
        if (table->ReorderColumn != -1 && table->ReorderColumnDir != 0)
        {
            // We need to handle reordering across hidden columns.
            // In the configuration below, moving C to the right of E will lead to:
            //    ... C [D] E  --->  ... [D] E  C   (Column name/index)
            //    ... 2  3  4        ...  2  3  4   (Display order)
            const int reorder_dir = table->ReorderColumnDir;
            IM_ASSERT(reorder_dir == -1 || reorder_dir == +1);
            IM_ASSERT(table->Flags & ImGuiTableFlags_Reorderable);
            ImGuiTableColumn* src_column = &table->Columns[table->ReorderColumn];
            ImGuiTableColumn* dst_column = &table->Columns[(reorder_dir == -1) ? src_column->PrevEnabledColumn : src_column->NextEnabledColumn];
            IM_UNUSED(dst_column);
            const int src_order = src_column->DisplayOrder;
            const int dst_order = dst_column->DisplayOrder;
            src_column->DisplayOrder = (ImGuiTableColumnIdx)dst_order;
            for (int order_n = src_order + reorder_dir; order_n != dst_order + reorder_dir; order_n += reorder_dir)
                table->Columns[table->DisplayOrderToIndex[order_n]].DisplayOrder -= (ImGuiTableColumnIdx)reorder_dir;
            IM_ASSERT(dst_column->DisplayOrder == dst_order - reorder_dir);

            // Display order is stored in both columns->IndexDisplayOrder and table->DisplayOrder[],
            // rebuild the later from the former.
            for (int column_n = 0; column_n < table->ColumnsCount; column_n++)
                table->DisplayOrderToIndex[table->Columns[column_n].DisplayOrder] = (ImGuiTableColumnIdx)column_n;
            table->ReorderColumnDir = 0;
            table->IsSettingsDirty = true;
        }
    }

    // Handle display order reset request
    if (table->IsResetDisplayOrderRequest)
    {
        for (int n = 0; n < table->ColumnsCount; n++)
            table->DisplayOrderToIndex[n] = table->Columns[n].DisplayOrder = (ImGuiTableColumnIdx)n;
        table->IsResetDisplayOrderRequest = false;
        table->IsSettingsDirty = true;
    }
}

// Adjust flags: default width mode + stretch columns are not allowed when auto extending
static void TableSetupColumnFlags(ImGuiTable* table, ImGuiTableColumn* column, ImGuiTableColumnFlags flags_in)
{
    ImGuiTableColumnFlags flags = flags_in;

    // Sizing Policy
    if ((flags & ImGuiTableColumnFlags_WidthMask_) == 0)
    {
        const ImGuiTableFlags table_sizing_policy = (table->Flags & ImGuiTableFlags_SizingMask_);
        if (table_sizing_policy == ImGuiTableFlags_SizingFixedFit || table_sizing_policy == ImGuiTableFlags_SizingFixedSame)
            flags |= ImGuiTableColumnFlags_WidthFixed;
        else
            flags |= ImGuiTableColumnFlags_WidthStretch;
    }
    else
    {
        IM_ASSERT(ImIsPowerOfTwo(flags & ImGuiTableColumnFlags_WidthMask_)); // Check that only 1 of each set is used.
    }

    // Resize
    if ((table->Flags & ImGuiTableFlags_Resizable) == 0)
        flags |= ImGuiTableColumnFlags_NoResize;

    // Sorting
    if ((flags & ImGuiTableColumnFlags_NoSortAscending) && (flags & ImGuiTableColumnFlags_NoSortDescending))
        flags |= ImGuiTableColumnFlags_NoSort;

    // Indentation
    if ((flags & ImGuiTableColumnFlags_IndentMask_) == 0)
        flags |= (table->Columns.index_from_ptr(column) == 0) ? ImGuiTableColumnFlags_IndentEnable : ImGuiTableColumnFlags_IndentDisable;

    // Alignment
    //if ((flags & ImGuiTableColumnFlags_AlignMask_) == 0)
    //    flags |= ImGuiTableColumnFlags_AlignCenter;
    //IM_ASSERT(ImIsPowerOfTwo(flags & ImGuiTableColumnFlags_AlignMask_)); // Check that only 1 of each set is used.

    // Preserve status flags
    column->Flags = flags | (column->Flags & ImGuiTableColumnFlags_StatusMask_);

    // Build an ordered list of available sort directions
    column->SortDirectionsAvailCount = column->SortDirectionsAvailMask = column->SortDirectionsAvailList = 0;
    if (table->Flags & ImGuiTableFlags_Sortable)
    {
        int count = 0, mask = 0, list = 0;
        if ((flags & ImGuiTableColumnFlags_PreferSortAscending)  != 0 && (flags & ImGuiTableColumnFlags_NoSortAscending)  == 0) { mask |= 1 << ImGuiSortDirection_Ascending;  list |= ImGuiSortDirection_Ascending  << (count << 1); count++; }
        if ((flags & ImGuiTableColumnFlags_PreferSortDescending) != 0 && (flags & ImGuiTableColumnFlags_NoSortDescending) == 0) { mask |= 1 << ImGuiSortDirection_Descending; list |= ImGuiSortDirection_Descending << (count << 1); count++; }
        if ((flags & ImGuiTableColumnFlags_PreferSortAscending)  == 0 && (flags & ImGuiTableColumnFlags_NoSortAscending)  == 0) { mask |= 1 << ImGuiSortDirection_Ascending;  list |= ImGuiSortDirection_Ascending  << (count << 1); count++; }
        if ((flags & ImGuiTableColumnFlags_PreferSortDescending) == 0 && (flags & ImGuiTableColumnFlags_NoSortDescending) == 0) { mask |= 1 << ImGuiSortDirection_Descending; list |= ImGuiSortDirection_Descending << (count << 1); count++; }
        if ((table->Flags & ImGuiTableFlags_SortTristate) || count == 0) { mask |= 1 << ImGuiSortDirection_None; count++; }
        column->SortDirectionsAvailList = (ImU8)list;
        column->SortDirectionsAvailMask = (ImU8)mask;
        column->SortDirectionsAvailCount = (ImU8)count;
        ImGui::TableFixColumnSortDirection(table, column);
    }
}

// Layout columns for the frame. This is in essence the followup to BeginTable().
// Runs on the first call to TableNextRow(), to give a chance for TableSetupColumn() to be called first.
// FIXME-TABLE: Our width (and therefore our WorkRect) will be minimal in the first frame for _WidthAuto columns.
// Increase feedback side-effect with widgets relying on WorkRect.Max.x... Maybe provide a default distribution for _WidthAuto columns?
void ImGui::TableUpdateLayout(ImGuiTable* table)
{
    ImGuiContext& g = *GImGui;
    IM_ASSERT(table->IsLayoutLocked == false);

    const ImGuiTableFlags table_sizing_policy = (table->Flags & ImGuiTableFlags_SizingMask_);
    table->IsDefaultDisplayOrder = true;
    table->ColumnsEnabledCount = 0;
    table->EnabledMaskByIndex = 0x00;
    table->EnabledMaskByDisplayOrder = 0x00;
    table->LeftMostEnabledColumn = -1;
    table->MinColumnWidth = ImMax(1.0f, g.Style.FramePadding.x * 1.0f); // g.Style.ColumnsMinSpacing; // FIXME-TABLE

    // [Part 1] Apply/lock Enabled and Order states. Calculate auto/ideal width for columns. Count fixed/stretch columns.
    // Process columns in their visible orders as we are building the Prev/Next indices.
    int count_fixed = 0;                // Number of columns that have fixed sizing policies
    int count_stretch = 0;              // Number of columns that have stretch sizing policies
    int prev_visible_column_idx = -1;
    bool has_auto_fit_request = false;
    bool has_resizable = false;
    float stretch_sum_width_auto = 0.0f;
    float fixed_max_width_auto = 0.0f;
    for (int order_n = 0; order_n < table->ColumnsCount; order_n++)
    {
        const int column_n = table->DisplayOrderToIndex[order_n];
        if (column_n != order_n)
            table->IsDefaultDisplayOrder = false;
        ImGuiTableColumn* column = &table->Columns[column_n];

        // Clear column setup if not submitted by user. Currently we make it mandatory to call TableSetupColumn() every frame.
        // It would easily work without but we're not ready to guarantee it since e.g. names need resubmission anyway.
        // We take a slight shortcut but in theory we could be calling TableSetupColumn() here with dummy values, it should yield the same effect.
        if (table->DeclColumnsCount <= column_n)
        {
            TableSetupColumnFlags(table, column, ImGuiTableColumnFlags_None);
            column->NameOffset = -1;
            column->UserID = 0;
            column->InitStretchWeightOrWidth = -1.0f;
        }

        // Update Enabled state, mark settings and sort specs dirty
        if (!(table->Flags & ImGuiTableFlags_Hideable) || (column->Flags & ImGuiTableColumnFlags_NoHide))
            column->IsUserEnabledNextFrame = true;
        if (column->IsUserEnabled != column->IsUserEnabledNextFrame)
        {
            column->IsUserEnabled = column->IsUserEnabledNextFrame;
            table->IsSettingsDirty = true;
        }
        column->IsEnabled = column->IsUserEnabled && (column->Flags & ImGuiTableColumnFlags_Disabled) == 0;

        if (column->SortOrder != -1 && !column->IsEnabled)
            table->IsSortSpecsDirty = true;
        if (column->SortOrder > 0 && !(table->Flags & ImGuiTableFlags_SortMulti))
            table->IsSortSpecsDirty = true;

        // Auto-fit unsized columns
        const bool start_auto_fit = (column->Flags & ImGuiTableColumnFlags_WidthFixed) ? (column->WidthRequest < 0.0f) : (column->StretchWeight < 0.0f);
        if (start_auto_fit)
            column->AutoFitQueue = column->CannotSkipItemsQueue = (1 << 3) - 1; // Fit for three frames

        if (!column->IsEnabled)
        {
            column->IndexWithinEnabledSet = -1;
            continue;
        }

        // Mark as enabled and link to previous/next enabled column
        column->PrevEnabledColumn = (ImGuiTableColumnIdx)prev_visible_column_idx;
        column->NextEnabledColumn = -1;
        if (prev_visible_column_idx != -1)
            table->Columns[prev_visible_column_idx].NextEnabledColumn = (ImGuiTableColumnIdx)column_n;
        else
            table->LeftMostEnabledColumn = (ImGuiTableColumnIdx)column_n;
        column->IndexWithinEnabledSet = table->ColumnsEnabledCount++;
        table->EnabledMaskByIndex |= (ImU64)1 << column_n;
        table->EnabledMaskByDisplayOrder |= (ImU64)1 << column->DisplayOrder;
        prev_visible_column_idx = column_n;
        IM_ASSERT(column->IndexWithinEnabledSet <= column->DisplayOrder);

        // Calculate ideal/auto column width (that's the width required for all contents to be visible without clipping)
        // Combine width from regular rows + width from headers unless requested not to.
        if (!column->IsPreserveWidthAuto)
            column->WidthAuto = TableGetColumnWidthAuto(table, column);

        // Non-resizable columns keep their requested width (apply user value regardless of IsPreserveWidthAuto)
        const bool column_is_resizable = (column->Flags & ImGuiTableColumnFlags_NoResize) == 0;
        if (column_is_resizable)
            has_resizable = true;
        if ((column->Flags & ImGuiTableColumnFlags_WidthFixed) && column->InitStretchWeightOrWidth > 0.0f && !column_is_resizable)
            column->WidthAuto = column->InitStretchWeightOrWidth;

        if (column->AutoFitQueue != 0x00)
            has_auto_fit_request = true;
        if (column->Flags & ImGuiTableColumnFlags_WidthStretch)
        {
            stretch_sum_width_auto += column->WidthAuto;
            count_stretch++;
        }
        else
        {
            fixed_max_width_auto = ImMax(fixed_max_width_auto, column->WidthAuto);
            count_fixed++;
        }
    }
    if ((table->Flags & ImGuiTableFlags_Sortable) && table->SortSpecsCount == 0 && !(table->Flags & ImGuiTableFlags_SortTristate))
        table->IsSortSpecsDirty = true;
    table->RightMostEnabledColumn = (ImGuiTableColumnIdx)prev_visible_column_idx;
    IM_ASSERT(table->LeftMostEnabledColumn >= 0 && table->RightMostEnabledColumn >= 0);

    // [Part 2] Disable child window clipping while fitting columns. This is not strictly necessary but makes it possible
    // to avoid the column fitting having to wait until the first visible frame of the child container (may or not be a good thing).
    // FIXME-TABLE: for always auto-resizing columns may not want to do that all the time.
    if (has_auto_fit_request && table->OuterWindow != table->InnerWindow)
        table->InnerWindow->SkipItems = false;
    if (has_auto_fit_request)
        table->IsSettingsDirty = true;

    // [Part 3] Fix column flags and record a few extra information.
    float sum_width_requests = 0.0f;        // Sum of all width for fixed and auto-resize columns, excluding width contributed by Stretch columns but including spacing/padding.
    float stretch_sum_weights = 0.0f;       // Sum of all weights for stretch columns.
    table->LeftMostStretchedColumn = table->RightMostStretchedColumn = -1;
    for (int column_n = 0; column_n < table->ColumnsCount; column_n++)
    {
        if (!(table->EnabledMaskByIndex & ((ImU64)1 << column_n)))
            continue;
        ImGuiTableColumn* column = &table->Columns[column_n];

        const bool column_is_resizable = (column->Flags & ImGuiTableColumnFlags_NoResize) == 0;
        if (column->Flags & ImGuiTableColumnFlags_WidthFixed)
        {
            // Apply same widths policy
            float width_auto = column->WidthAuto;
            if (table_sizing_policy == ImGuiTableFlags_SizingFixedSame && (column->AutoFitQueue != 0x00 || !column_is_resizable))
                width_auto = fixed_max_width_auto;

            // Apply automatic width
            // Latch initial size for fixed columns and update it constantly for auto-resizing column (unless clipped!)
            if (column->AutoFitQueue != 0x00)
                column->WidthRequest = width_auto;
            else if ((column->Flags & ImGuiTableColumnFlags_WidthFixed) && !column_is_resizable && (table->RequestOutputMaskByIndex & ((ImU64)1 << column_n)))
                column->WidthRequest = width_auto;

            // FIXME-TABLE: Increase minimum size during init frame to avoid biasing auto-fitting widgets
            // (e.g. TextWrapped) too much. Otherwise what tends to happen is that TextWrapped would output a very
            // large height (= first frame scrollbar display very off + clipper would skip lots of items).
            // This is merely making the side-effect less extreme, but doesn't properly fixes it.
            // FIXME: Move this to ->WidthGiven to avoid temporary lossyless?
            // FIXME: This break IsPreserveWidthAuto from not flickering if the stored WidthAuto was smaller.
            if (column->AutoFitQueue > 0x01 && table->IsInitializing && !column->IsPreserveWidthAuto)
                column->WidthRequest = ImMax(column->WidthRequest, table->MinColumnWidth * 4.0f); // FIXME-TABLE: Another constant/scale?
            sum_width_requests += column->WidthRequest;
        }
        else
        {
            // Initialize stretch weight
            if (column->AutoFitQueue != 0x00 || column->StretchWeight < 0.0f || !column_is_resizable)
            {
                if (column->InitStretchWeightOrWidth > 0.0f)
                    column->StretchWeight = column->InitStretchWeightOrWidth;
                else if (table_sizing_policy == ImGuiTableFlags_SizingStretchProp)
                    column->StretchWeight = (column->WidthAuto / stretch_sum_width_auto) * count_stretch;
                else
                    column->StretchWeight = 1.0f;
            }

            stretch_sum_weights += column->StretchWeight;
            if (table->LeftMostStretchedColumn == -1 || table->Columns[table->LeftMostStretchedColumn].DisplayOrder > column->DisplayOrder)
                table->LeftMostStretchedColumn = (ImGuiTableColumnIdx)column_n;
            if (table->RightMostStretchedColumn == -1 || table->Columns[table->RightMostStretchedColumn].DisplayOrder < column->DisplayOrder)
                table->RightMostStretchedColumn = (ImGuiTableColumnIdx)column_n;
        }
        column->IsPreserveWidthAuto = false;
        sum_width_requests += table->CellPaddingX * 2.0f;
    }
    table->ColumnsEnabledFixedCount = (ImGuiTableColumnIdx)count_fixed;
    table->ColumnsStretchSumWeights = stretch_sum_weights;

    // [Part 4] Apply final widths based on requested widths
    const ImRect work_rect = table->WorkRect;
    const float width_spacings = (table->OuterPaddingX * 2.0f) + (table->CellSpacingX1 + table->CellSpacingX2) * (table->ColumnsEnabledCount - 1);
    const float width_removed = (table->HasScrollbarYPrev && !table->InnerWindow->ScrollbarY) ? g.Style.ScrollbarSize : 0.0f; // To synchronize decoration width of synched tables with mismatching scrollbar state (#5920)
    const float width_avail = ImMax(1.0f, (((table->Flags & ImGuiTableFlags_ScrollX) && table->InnerWidth == 0.0f) ? table->InnerClipRect.GetWidth() : work_rect.GetWidth()) - width_removed);
    const float width_avail_for_stretched_columns = width_avail - width_spacings - sum_width_requests;
    float width_remaining_for_stretched_columns = width_avail_for_stretched_columns;
    table->ColumnsGivenWidth = width_spacings + (table->CellPaddingX * 2.0f) * table->ColumnsEnabledCount;
    for (int column_n = 0; column_n < table->ColumnsCount; column_n++)
    {
        if (!(table->EnabledMaskByIndex & ((ImU64)1 << column_n)))
            continue;
        ImGuiTableColumn* column = &table->Columns[column_n];

        // Allocate width for stretched/weighted columns (StretchWeight gets converted into WidthRequest)
        if (column->Flags & ImGuiTableColumnFlags_WidthStretch)
        {
            float weight_ratio = column->StretchWeight / stretch_sum_weights;
            column->WidthRequest = IM_FLOOR(ImMax(width_avail_for_stretched_columns * weight_ratio, table->MinColumnWidth) + 0.01f);
            width_remaining_for_stretched_columns -= column->WidthRequest;
        }

        // [Resize Rule 1] The right-most Visible column is not resizable if there is at least one Stretch column
        // See additional comments in TableSetColumnWidth().
        if (column->NextEnabledColumn == -1 && table->LeftMostStretchedColumn != -1)
            column->Flags |= ImGuiTableColumnFlags_NoDirectResize_;

        // Assign final width, record width in case we will need to shrink
        column->WidthGiven = ImFloor(ImMax(column->WidthRequest, table->MinColumnWidth));
        table->ColumnsGivenWidth += column->WidthGiven;
    }

    // [Part 5] Redistribute stretch remainder width due to rounding (remainder width is < 1.0f * number of Stretch column).
    // Using right-to-left distribution (more likely to match resizing cursor).
    if (width_remaining_for_stretched_columns >= 1.0f && !(table->Flags & ImGuiTableFlags_PreciseWidths))
        for (int order_n = table->ColumnsCount - 1; stretch_sum_weights > 0.0f && width_remaining_for_stretched_columns >= 1.0f && order_n >= 0; order_n--)
        {
            if (!(table->EnabledMaskByDisplayOrder & ((ImU64)1 << order_n)))
                continue;
            ImGuiTableColumn* column = &table->Columns[table->DisplayOrderToIndex[order_n]];
            if (!(column->Flags & ImGuiTableColumnFlags_WidthStretch))
                continue;
            column->WidthRequest += 1.0f;
            column->WidthGiven += 1.0f;
            width_remaining_for_stretched_columns -= 1.0f;
        }

    // Determine if table is hovered which will be used to flag columns as hovered.
    // - In principle we'd like to use the equivalent of IsItemHovered(ImGuiHoveredFlags_AllowWhenBlockedByActiveItem),
    //   but because our item is partially submitted at this point we use ItemHoverable() and a workaround (temporarily
    //   clear ActiveId, which is equivalent to the change provided by _AllowWhenBLockedByActiveItem).
    // - This allows columns to be marked as hovered when e.g. clicking a button inside the column, or using drag and drop.
    ImGuiTableInstanceData* table_instance = TableGetInstanceData(table, table->InstanceCurrent);
    table->HoveredColumnBody = -1;
    table->HoveredColumnBorder = -1;
    const ImRect mouse_hit_rect(table->OuterRect.Min.x, table->OuterRect.Min.y, table->OuterRect.Max.x, ImMax(table->OuterRect.Max.y, table->OuterRect.Min.y + table_instance->LastOuterHeight));
    const ImGuiID backup_active_id = g.ActiveId;
    g.ActiveId = 0;
    const bool is_hovering_table = ItemHoverable(mouse_hit_rect, 0);
    g.ActiveId = backup_active_id;

    // [Part 6] Setup final position, offset, skip/clip states and clipping rectangles, detect hovered column
    // Process columns in their visible orders as we are comparing the visible order and adjusting host_clip_rect while looping.
    int visible_n = 0;
    bool offset_x_frozen = (table->FreezeColumnsCount > 0);
    float offset_x = ((table->FreezeColumnsCount > 0) ? table->OuterRect.Min.x : work_rect.Min.x) + table->OuterPaddingX - table->CellSpacingX1;
    ImRect host_clip_rect = table->InnerClipRect;
    //host_clip_rect.Max.x += table->CellPaddingX + table->CellSpacingX2;
    table->VisibleMaskByIndex = 0x00;
    table->RequestOutputMaskByIndex = 0x00;
    for (int order_n = 0; order_n < table->ColumnsCount; order_n++)
    {
        const int column_n = table->DisplayOrderToIndex[order_n];
        ImGuiTableColumn* column = &table->Columns[column_n];

        column->NavLayerCurrent = (ImS8)(table->FreezeRowsCount > 0 ? ImGuiNavLayer_Menu : ImGuiNavLayer_Main); // Use Count NOT request so Header line changes layer when frozen

        if (offset_x_frozen && table->FreezeColumnsCount == visible_n)
        {
            offset_x += work_rect.Min.x - table->OuterRect.Min.x;
            offset_x_frozen = false;
        }

        // Clear status flags
        column->Flags &= ~ImGuiTableColumnFlags_StatusMask_;

        if ((table->EnabledMaskByDisplayOrder & ((ImU64)1 << order_n)) == 0)
        {
            // Hidden column: clear a few fields and we are done with it for the remainder of the function.
            // We set a zero-width clip rect but set Min.y/Max.y properly to not interfere with the clipper.
            column->MinX = column->MaxX = column->WorkMinX = column->ClipRect.Min.x = column->ClipRect.Max.x = offset_x;
            column->WidthGiven = 0.0f;
            column->ClipRect.Min.y = work_rect.Min.y;
            column->ClipRect.Max.y = FLT_MAX;
            column->ClipRect.ClipWithFull(host_clip_rect);
            column->IsVisibleX = column->IsVisibleY = column->IsRequestOutput = false;
            column->IsSkipItems = true;
            column->ItemWidth = 1.0f;
            continue;
        }

        // Detect hovered column
        if (is_hovering_table && g.IO.MousePos.x >= column->ClipRect.Min.x && g.IO.MousePos.x < column->ClipRect.Max.x)
            table->HoveredColumnBody = (ImGuiTableColumnIdx)column_n;

        // Lock start position
        column->MinX = offset_x;

        // Lock width based on start position and minimum/maximum width for this position
        float max_width = TableGetMaxColumnWidth(table, column_n);
        column->WidthGiven = ImMin(column->WidthGiven, max_width);
        column->WidthGiven = ImMax(column->WidthGiven, ImMin(column->WidthRequest, table->MinColumnWidth));
        column->MaxX = offset_x + column->WidthGiven + table->CellSpacingX1 + table->CellSpacingX2 + table->CellPaddingX * 2.0f;

        // Lock other positions
        // - ClipRect.Min.x: Because merging draw commands doesn't compare min boundaries, we make ClipRect.Min.x match left bounds to be consistent regardless of merging.
        // - ClipRect.Max.x: using WorkMaxX instead of MaxX (aka including padding) makes things more consistent when resizing down, tho slightly detrimental to visibility in very-small column.
        // - ClipRect.Max.x: using MaxX makes it easier for header to receive hover highlight with no discontinuity and display sorting arrow.
        // - FIXME-TABLE: We want equal width columns to have equal (ClipRect.Max.x - WorkMinX) width, which means ClipRect.max.x cannot stray off host_clip_rect.Max.x else right-most column may appear shorter.
        column->WorkMinX = column->MinX + table->CellPaddingX + table->CellSpacingX1;
        column->WorkMaxX = column->MaxX - table->CellPaddingX - table->CellSpacingX2; // Expected max
        column->ItemWidth = ImFloor(column->WidthGiven * 0.65f);
        column->ClipRect.Min.x = column->MinX;
        column->ClipRect.Min.y = work_rect.Min.y;
        column->ClipRect.Max.x = column->MaxX; //column->WorkMaxX;
        column->ClipRect.Max.y = FLT_MAX;
        column->ClipRect.ClipWithFull(host_clip_rect);

        // Mark column as Clipped (not in sight)
        // Note that scrolling tables (where inner_window != outer_window) handle Y clipped earlier in BeginTable() so IsVisibleY really only applies to non-scrolling tables.
        // FIXME-TABLE: Because InnerClipRect.Max.y is conservatively ==outer_window->ClipRect.Max.y, we never can mark columns _Above_ the scroll line as not IsVisibleY.
        // Taking advantage of LastOuterHeight would yield good results there...
        // FIXME-TABLE: Y clipping is disabled because it effectively means not submitting will reduce contents width which is fed to outer_window->DC.CursorMaxPos.x,
        // and this may be used (e.g. typically by outer_window using AlwaysAutoResize or outer_window's horizontal scrollbar, but could be something else).
        // Possible solution to preserve last known content width for clipped column. Test 'table_reported_size' fails when enabling Y clipping and window is resized small.
        column->IsVisibleX = (column->ClipRect.Max.x > column->ClipRect.Min.x);
        column->IsVisibleY = true; // (column->ClipRect.Max.y > column->ClipRect.Min.y);
        const bool is_visible = column->IsVisibleX; //&& column->IsVisibleY;
        if (is_visible)
            table->VisibleMaskByIndex |= ((ImU64)1 << column_n);

        // Mark column as requesting output from user. Note that fixed + non-resizable sets are auto-fitting at all times and therefore always request output.
        column->IsRequestOutput = is_visible || column->AutoFitQueue != 0 || column->CannotSkipItemsQueue != 0;
        if (column->IsRequestOutput)
            table->RequestOutputMaskByIndex |= ((ImU64)1 << column_n);

        // Mark column as SkipItems (ignoring all items/layout)
        column->IsSkipItems = !column->IsEnabled || table->HostSkipItems;
        if (column->IsSkipItems)
            IM_ASSERT(!is_visible);

        // Update status flags
        column->Flags |= ImGuiTableColumnFlags_IsEnabled;
        if (is_visible)
            column->Flags |= ImGuiTableColumnFlags_IsVisible;
        if (column->SortOrder != -1)
            column->Flags |= ImGuiTableColumnFlags_IsSorted;
        if (table->HoveredColumnBody == column_n)
            column->Flags |= ImGuiTableColumnFlags_IsHovered;

        // Alignment
        // FIXME-TABLE: This align based on the whole column width, not per-cell, and therefore isn't useful in
        // many cases (to be able to honor this we might be able to store a log of cells width, per row, for
        // visible rows, but nav/programmatic scroll would have visible artifacts.)
        //if (column->Flags & ImGuiTableColumnFlags_AlignRight)
        //    column->WorkMinX = ImMax(column->WorkMinX, column->MaxX - column->ContentWidthRowsUnfrozen);
        //else if (column->Flags & ImGuiTableColumnFlags_AlignCenter)
        //    column->WorkMinX = ImLerp(column->WorkMinX, ImMax(column->StartX, column->MaxX - column->ContentWidthRowsUnfrozen), 0.5f);

        // Reset content width variables
        column->ContentMaxXFrozen = column->ContentMaxXUnfrozen = column->WorkMinX;
        column->ContentMaxXHeadersUsed = column->ContentMaxXHeadersIdeal = column->WorkMinX;

        // Don't decrement auto-fit counters until container window got a chance to submit its items
        if (table->HostSkipItems == false)
        {
            column->AutoFitQueue >>= 1;
            column->CannotSkipItemsQueue >>= 1;
        }

        if (visible_n < table->FreezeColumnsCount)
            host_clip_rect.Min.x = ImClamp(column->MaxX + TABLE_BORDER_SIZE, host_clip_rect.Min.x, host_clip_rect.Max.x);

        offset_x += column->WidthGiven + table->CellSpacingX1 + table->CellSpacingX2 + table->CellPaddingX * 2.0f;
        visible_n++;
    }

    // [Part 7] Detect/store when we are hovering the unused space after the right-most column (so e.g. context menus can react on it)
    // Clear Resizable flag if none of our column are actually resizable (either via an explicit _NoResize flag, either
    // because of using _WidthAuto/_WidthStretch). This will hide the resizing option from the context menu.
    const float unused_x1 = ImMax(table->WorkRect.Min.x, table->Columns[table->RightMostEnabledColumn].ClipRect.