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imgui_tables.cpp
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// dear imgui, v1.80 WIP
// (tables and columns code)
/*
Index of this file:
// [SECTION] Tables: Main code
// [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.NavigateTo") 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.
//-----------------------------------------------------------------------------
// 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 of if we are using ScrollX/ScrollY flags.
// Default value is ImVec2(-FLT_MIN, 0.0f). When binding this in a scripting language please follow this default value.
// X
// - outer_size.x < 0.0f -> Right-align from window/work-rect right-most edge. With -FLT_MIN will right-align exactly on right-most edge. With -1.0f will right-align one pixel away from right-most edge.
// - outer_size.x = 0.0f -> Auto width. Generally use all available width. When NOT using scrolling and NOT using any Stretch column, use only necessary width, otherwise same as -FLT_MIN.
// - outer_size.x > 0.0f -> 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 NoHostExtendV is set)
// - outer_size.y = 0.0f -> No minimum height (but will auto extend, unless NoHostExtendV is set)
// - outer_size.y > 0.0f -> Set Minimum height (but will auto extend, unless NoHostExtendV is set)
// Y with ScrollX/ScrollY enabled: using a child window for scrolling
// - outer_size.y < 0.0f -> Bottom-align
// - 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.
//-----------------------------------------------------------------------------
// About 'inner_width':
// With ScrollX disabled:
// - inner_width -> *ignored*
// With ScrollX enable:
// - 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 width/weight with TableSetupColumn():
// We use a default parameter of 'init_width_or_weight == -1'.
// - With ImGuiTableColumnFlags_WidthAuto, init_width (ignored) --> width is automatic
// - 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 width policy (if you don't specify a ImGuiTableColumnFlags_WidthXXXX flag)
// - When Table policy ImGuiTableFlags_SizingPolicyStretch --> default Column policy is ImGuiTableColumnFlags_WidthStretch
// - When Table policy ImGuiTableFlags_SizingPolicyFixed and (Table is Resizable or init_width > 0) --> default Column policy is ImGuiTableColumnFlags_WidthFixed
// - When Table policy ImGuiTableFlags_SizingPolicyFixed and (Table is not Resizable and init_width <= 0) --> default Column policy is ImGuiTableColumnFlags_WidthAuto
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// 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 columns with the ImGuiTableColumnFlags_WidthAuto policy generally don't play well with using the clipper,
// and by default a table with _ScrollX but without _Resizable will have columns default to _WidthAuto.
// So, if you want to use the clipper, make sure to either enable _Resizable, either setup columns explicitly with _WidthFixed.
//-----------------------------------------------------------------------------
// About clipping/culling of Columns in Tables:
// - 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 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.
//-----------------------------------------------------------------------------
#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
//-------------------------------------------------------------------------
// Warnings
//-------------------------------------------------------------------------
// 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
#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
//-----------------------------------------------------------------------------
// 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_SizingPolicyStretch | ImGuiTableFlags_SizingPolicyFixed)) == 0)
flags |= ((flags & ImGuiTableFlags_ScrollX) || (outer_window->Flags & ImGuiWindowFlags_AlwaysAutoResize)) ? ImGuiTableFlags_SizingPolicyFixed : ImGuiTableFlags_SizingPolicyStretch;
// Adjust flags: disable Resizable when using SameWidths (done above enforcing BordersInnerV)
if (flags & ImGuiTableFlags_SameWidths)
flags = (flags & ~ImGuiTableFlags_Resizable) | ImGuiTableFlags_NoKeepColumnsVisible;
// Adjust flags: enforce borders when resizable
if (flags & ImGuiTableFlags_Resizable)
flags |= ImGuiTableFlags_BordersInnerV;
// Adjust flags: disable NoHostExtendY if we have any scrolling going on
if ((flags & ImGuiTableFlags_NoHostExtendY) && (flags & (ImGuiTableFlags_ScrollX | ImGuiTableFlags_ScrollY)) != 0)
flags &= ~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)
#ifdef IMGUI_HAS_DOCK
ImGuiWindow* window_for_settings = outer_window->RootWindowDockStop;
#else
ImGuiWindow* window_for_settings = outer_window->RootWindow;
#endif
if (window_for_settings->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, false))
{
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");
// Fix flags
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;
table->IsOuterRectAutoFitX = (outer_size.x == 0.0f) && (use_child_window == false);
// 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));
// 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);
}
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;
table->HostBackupWorkRect = inner_window->WorkRect;
table->HostBackupParentWorkRect = inner_window->ParentWorkRect;
table->HostBackupColumnsOffset = outer_window->DC.ColumnsOffset;
table->HostBackupPrevLineSize = inner_window->DC.PrevLineSize;
table->HostBackupCurrLineSize = inner_window->DC.CurrLineSize;
table->HostBackupCursorMaxPos = inner_window->DC.CursorMaxPos;
table->HostBackupItemWidth = outer_window->DC.ItemWidth;
table->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->IsUnfrozen = 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
const int table_idx = g.Tables.GetIndex(table);
g.CurrentTableStack.push_back(ImGuiPtrOrIndex(table_idx));
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;
table->MemoryCompacted = false;
// Setup memory buffer (clear data if columns count changed)
const int stored_size = table->Columns.size();
if (stored_size != 0 && stored_size != columns_count)
{
IM_FREE(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->AutoFitSingleStretchColumn = -1;
table->HoveredColumnBody = table->HoveredColumnBorder = -1;
for (int n = 0; n < columns_count; n++)
{
ImGuiTableColumn* column = &table->Columns[n];
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->DisplayOrder = table->DisplayOrderToIndex[n] = (ImGuiTableColumnIdx)n;
column->IsEnabled = column->IsEnabledNextFrame = true;
}
}
// 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_LOG("[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)
// + 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.ReserveBytes(0, columns_count * sizeof(ImGuiTableColumn));
span_allocator.ReserveBytes(1, columns_count * sizeof(ImGuiTableColumnIdx));
span_allocator.ReserveBytes(2, columns_count * sizeof(ImGuiTableCellData));
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 stretch column, which is a special case
// FIXME-TABLE: Would be nice to redistribute available stretch space accordingly to other weights, instead of giving it all to siblings.
if (table->AutoFitSingleStretchColumn != -1)
{
TableSetColumnWidth(table->AutoFitSingleStretchColumn, table->Columns[table->AutoFitSingleStretchColumn].WidthAuto);
table->AutoFitSingleStretchColumn = -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)
{
// FIXME-TABLE: Inconsistent to promote columns to WidthAuto
if (table->Flags & ImGuiTableFlags_SizingPolicyFixed)
flags |= ((table->Flags & ImGuiTableFlags_Resizable) && !(flags & ImGuiTableColumnFlags_NoResize)) ? ImGuiTableColumnFlags_WidthFixed : ImGuiTableColumnFlags_WidthAuto;
else
flags |= ImGuiTableColumnFlags_WidthStretch;
}
IM_ASSERT(ImIsPowerOfTwo(flags & ImGuiTableColumnFlags_WidthMask_)); // Check that only 1 of each set is used.
if (flags & ImGuiTableColumnFlags_WidthAuto)
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);
table->IsDefaultDisplayOrder = true;
table->ColumnsEnabledCount = 0;
table->EnabledMaskByIndex = 0x00;
table->EnabledMaskByDisplayOrder = 0x00;
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.
// Process columns in their visible orders as we are building the Prev/Next indices.
int last_visible_column_idx = -1;
bool want_auto_fit = false;
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 settings if not submitted by user.
// Currently we make it mandatory to call TableSetupColumn() every frame.
// It would easily work without but we're ready to guarantee it since e.g. names need resubmission anyway.
// In theory we could be calling TableSetupColumn() here with dummy values it should yield the same effect.
if (column_n >= table->DeclColumnsCount)
{
TableSetupColumnFlags(table, column, ImGuiTableColumnFlags_None);
column->NameOffset = -1;
column->UserID = 0;
column->InitStretchWeightOrWidth = -1.0f;
}
if (!(table->Flags & ImGuiTableFlags_Hideable) || (column->Flags & ImGuiTableColumnFlags_NoHide))
column->IsEnabledNextFrame = true;
if (column->IsEnabled != column->IsEnabledNextFrame)
{
column->IsEnabled = column->IsEnabledNextFrame;
table->IsSettingsDirty = true;
if (!column->IsEnabled && column->SortOrder != -1)
table->IsSortSpecsDirty = true;
}
if (column->SortOrder > 0 && !(table->Flags & ImGuiTableFlags_SortMulti))
table->IsSortSpecsDirty = true;
bool start_auto_fit = false;
if (column->Flags & (ImGuiTableColumnFlags_WidthFixed | ImGuiTableColumnFlags_WidthAuto))
start_auto_fit = column->WidthRequest < 0.0f;
else
start_auto_fit = column->StretchWeight < 0.0f;
if (start_auto_fit)
column->AutoFitQueue = column->CannotSkipItemsQueue = (1 << 3) - 1; // Fit for three frames
ImU64 index_mask = (ImU64)1 << column_n;
ImU64 display_order_mask = (ImU64)1 << column->DisplayOrder;
if (!column->IsEnabled)
{
column->IndexWithinEnabledSet = -1;
continue;
}
// Mark as enabled and link to previous/next enabled column
column->PrevEnabledColumn = (ImGuiTableColumnIdx)last_visible_column_idx;
column->NextEnabledColumn = -1;
if (last_visible_column_idx != -1)
table->Columns[last_visible_column_idx].NextEnabledColumn = (ImGuiTableColumnIdx)column_n;
column->IndexWithinEnabledSet = table->ColumnsEnabledCount;
table->ColumnsEnabledCount++;
table->EnabledMaskByIndex |= index_mask;
table->EnabledMaskByDisplayOrder |= display_order_mask;
last_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);
if (column->AutoFitQueue != 0x00)
want_auto_fit = true;
}
if ((table->Flags & ImGuiTableFlags_Sortable) && table->SortSpecsCount == 0 && !(table->Flags & ImGuiTableFlags_SortTristate))
table->IsSortSpecsDirty = true;
table->RightMostEnabledColumn = (ImGuiTableColumnIdx)last_visible_column_idx;
IM_ASSERT(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 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 (want_auto_fit && table->OuterWindow != table->InnerWindow)
table->InnerWindow->SkipItems = false;
if (want_auto_fit)
table->IsSettingsDirty = true;
// [Part 3] Fix column flags. Count how many fixed/stretch columns we have and sum of weights.
int count_fixed = 0; // Number of columns that have fixed sizing policy (not stretched sizing policy) (this is NOT the opposite of count_resizable!)
int count_resizable = 0; // Number of columns the user can resize (this is NOT the opposite of count_fixed!)
float sum_weights_stretched = 0.0f; // Sum of all weights for weighted columns.
float sum_width_fixed_requests = 0.0f; // Sum of all width for fixed and auto-resize columns, excluding width contributed by Stretch columns.
float max_width_auto = 0.0f; // Largest auto-width (used for SameWidths feature)
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];
// Count resizable columns
if ((column->Flags & ImGuiTableColumnFlags_NoResize) == 0)
count_resizable++;
if (column->Flags & (ImGuiTableColumnFlags_WidthFixed | ImGuiTableColumnFlags_WidthAuto))
{
// Non-resizable columns keep their requested width
if ((column->Flags & ImGuiTableColumnFlags_WidthFixed) && column->InitStretchWeightOrWidth > 0.0f)
if (!(table->Flags & ImGuiTableFlags_Resizable) || (column->Flags & ImGuiTableColumnFlags_NoResize))
column->WidthRequest = column->WidthAuto = ImMax(column->WidthAuto, column->InitStretchWeightOrWidth); // Use user value regardless of IsPreserveWidthAuto
// Process auto-fit for non-stretched columns
// Latch initial size for fixed columns and update it constantly for auto-resizing column (unless clipped!)
if ((column->AutoFitQueue != 0x00) || ((column->Flags & ImGuiTableColumnFlags_WidthAuto) && column->IsVisibleX))
column->WidthRequest = column->WidthAuto;
// 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?
count_fixed += 1;
sum_width_fixed_requests += column->WidthRequest;
}
else
{
IM_ASSERT(column->Flags & ImGuiTableColumnFlags_WidthStretch);
// Revert or initialize weight (when column->StretchWeight < 0.0f normally it means there has been no init value so it'll always default to 1.0f)
if (column->AutoFitQueue != 0x00 || column->StretchWeight < 0.0f)
column->StretchWeight = (column->InitStretchWeightOrWidth > 0.0f) ? column->InitStretchWeightOrWidth : 1.0f;
sum_weights_stretched += 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;
max_width_auto = ImMax(max_width_auto, column->WidthAuto);
sum_width_fixed_requests += table->CellPaddingX * 2.0f;
}
table->ColumnsEnabledFixedCount = (ImGuiTableColumnIdx)count_fixed;
// [Part 4] Apply "same widths" feature.
// - When all columns are fixed or columns are of mixed type: use the maximum auto width.
// - When all columns are stretch: use same weight.
const bool mixed_same_widths = (table->Flags & ImGuiTableFlags_SameWidths) && count_fixed > 0;
if (table->Flags & ImGuiTableFlags_SameWidths)
{
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];
if (column->Flags & (ImGuiTableColumnFlags_WidthFixed | ImGuiTableColumnFlags_WidthAuto))
{
sum_width_fixed_requests += max_width_auto - column->WidthRequest; // Update old sum
column->WidthRequest = max_width_auto;
}
else
{
sum_weights_stretched += 1.0f - column->StretchWeight; // Update old sum
column->StretchWeight = 1.0f;
if (mixed_same_widths)
column->WidthRequest = max_width_auto;
}
}
}
// [Part 5] 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_avail = ((table->Flags & ImGuiTableFlags_ScrollX) && table->InnerWidth == 0.0f) ? table->InnerClipRect.GetWidth() : work_rect.GetWidth();
const float width_avail_for_stretched_columns = mixed_same_widths ? 0.0f : width_avail - width_spacings - sum_width_fixed_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) && !mixed_same_widths)
{
float weight_ratio = column->StretchWeight / sum_weights_stretched;
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 6] 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; sum_weights_stretched > 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;
}
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->LastOuterHeight));
const bool is_hovering_table = ItemHoverable(mouse_hit_rect, 0);
// [Part 7] 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;
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 || column_n < table->FreezeColumnsCount) ? ImGuiNavLayer_Menu : ImGuiNavLayer_Main);
if (table->FreezeColumnsCount > 0 && table->FreezeColumnsCount == visible_n)
offset_x += work_rect.Min.x - table->OuterRect.Min.x;
// 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 = ImMax(host_clip_rect.Min.x, column->MaxX + TABLE_BORDER_SIZE);
offset_x += column->WidthGiven + table->CellSpacingX1 + table->CellSpacingX2 + table->CellPaddingX * 2.0f;
visible_n++;
}
// [Part 8] 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.Max.x);
if (is_hovering_table && table->HoveredColumnBody == -1)
{
if (g.IO.MousePos.x >= unused_x1)
table->HoveredColumnBody = (ImGuiTableColumnIdx)table->ColumnsCount;
}
if (count_resizable == 0 && (table->Flags & ImGuiTableFlags_Resizable))
table->Flags &= ~ImGuiTableFlags_Resizable;