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Tables: clarify FrozenColumns order to be in order space not in visible space.

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+ Removed LeftMostUnfrozenOrder + Angled Headers comments.
While not strictly part of #9312, presenting a suitable reordering menu was made difficult by the old behavior.
This commit is contained in:
ocornut
2026-04-01 19:07:59 +02:00
parent 07acc8bc87
commit 505bc9a312
4 changed files with 16 additions and 14 deletions
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9
docs/CHANGELOG.txt
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@@ -93,6 +93,15 @@ Other Changes:
using the idiom of not applying edits before IsItemDeactivatedAfterEdit().
(#9308, #8915, #8273)
- Tables:
- Fixed and clarified the behavior of using TableSetupScrollFreeze() with columns>1,
and where some of the columns within that range were Hidable.
- Before: TableSetupScrollFreeze(N, 0) made the first N _visible_ columns
part of the scroll freeze. So if you intentionally hide columns <N
the scroll freeze area would encompass the subsequent right columns.
- After: TableSetupScrollFreeze(N, 0) makes the first N _declared_ columns
part of the scroll freeze. So if you intentionally hide columns <N
the scroll freeze area will cover less columns.
- This is generally more sane and logical.
- Fixed dragging a header to reorder outside of visible bounds (due to horizontal scrolling)
from losing active id.
- Angled Headers: angled section for column being reordered via the regular headers

2
imgui.h
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@@ -30,7 +30,7 @@
// Library Version
// (Integer encoded as XYYZZ for use in #if preprocessor conditionals, e.g. '#if IMGUI_VERSION_NUM >= 12345')
#define IMGUI_VERSION "1.92.7 WIP"
#define IMGUI_VERSION_NUM 19268
#define IMGUI_VERSION_NUM 19269
#define IMGUI_HAS_TABLE // Added BeginTable() - from IMGUI_VERSION_NUM >= 18000
#define IMGUI_HAS_TEXTURES // Added ImGuiBackendFlags_RendererHasTextures - from IMGUI_VERSION_NUM >= 19198

1
imgui_internal.h
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@@ -3056,7 +3056,6 @@ struct IMGUI_API ImGuiTable
ImGuiTableColumnIdx FreezeRowsCount; // Actual frozen row count (== FreezeRowsRequest, or == 0 when no scrolling offset)
ImGuiTableColumnIdx FreezeColumnsRequest; // Requested frozen columns count
ImGuiTableColumnIdx FreezeColumnsCount; // Actual frozen columns count (== FreezeColumnsRequest, or == 0 when no scrolling offset)
ImGuiTableColumnIdx LeftMostUnfrozenOrder; // Display order of the left-most unfrozen column, which is used to determine where the freezing line should be.
ImGuiTableColumnIdx RowCellDataCurrent; // Index of current RowCellData[] entry in current row
ImGuiTableDrawChannelIdx DummyDrawChannel; // Redirect non-visible columns here.
ImGuiTableDrawChannelIdx Bg2DrawChannelCurrent; // For Selectable() and other widgets drawing across columns after the freezing line. Index within DrawSplitter.Channels[]

18
imgui_tables.cpp
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@@ -753,7 +753,7 @@ void ImGui::TableQueueSetColumnDisplayOrder(ImGuiTable* table, int column_n, int
// Verify that we don't cross the frozen column limit.
// TableSetupScrollFreeze() enforce a display order range for frozen columns. Reordering across the frozen column barrier is illegal and will be undone.
if (src_column->IsUserEnabled && (src_order < table->LeftMostUnfrozenOrder) != (dst_order < table->LeftMostUnfrozenOrder))
if (src_column->IsUserEnabled && (src_order < table->FreezeColumnsRequest) != (dst_order < table->FreezeColumnsRequest))
return;
// Verify that we don't reorder columns with the ImGuiTableColumnFlags_NoReorder flag, nor cross through them.
@@ -836,7 +836,6 @@ void ImGui::TableUpdateLayout(ImGuiTable* table)
ImBitArrayClearAllBits(table->EnabledMaskByIndex, table->ColumnsCount);
ImBitArrayClearAllBits(table->EnabledMaskByDisplayOrder, table->ColumnsCount);
table->LeftMostEnabledColumn = -1;
table->LeftMostUnfrozenOrder = -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.
@@ -900,8 +899,6 @@ void ImGui::TableUpdateLayout(ImGuiTable* table)
else
table->LeftMostEnabledColumn = (ImGuiTableColumnIdx)column_n;
column->IndexWithinEnabledSet = table->ColumnsEnabledCount++;
if (table->ColumnsEnabledCount == table->FreezeColumnsRequest)
table->LeftMostUnfrozenOrder = (ImGuiTableColumnIdx)(order_n + 1);
ImBitArraySetBit(table->EnabledMaskByIndex, column_n);
ImBitArraySetBit(table->EnabledMaskByDisplayOrder, column->DisplayOrder);
prev_visible_column_idx = column_n;
@@ -935,8 +932,6 @@ void ImGui::TableUpdateLayout(ImGuiTable* table)
if ((table->Flags & ImGuiTableFlags_Sortable) && table->SortSpecsCount == 0 && !(table->Flags & ImGuiTableFlags_SortTristate))
table->IsSortSpecsDirty = true;
table->RightMostEnabledColumn = (ImGuiTableColumnIdx)prev_visible_column_idx;
if (table->LeftMostUnfrozenOrder == -1)
table->LeftMostUnfrozenOrder = table->ColumnsEnabledCount;
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
@@ -1077,7 +1072,6 @@ void ImGui::TableUpdateLayout(ImGuiTable* table)
// [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 has_at_least_one_column_requesting_output = false;
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;
@@ -1092,7 +1086,7 @@ void ImGui::TableUpdateLayout(ImGuiTable* table)
// Initial nav layer: using FreezeRowsCount, NOT FreezeRowsRequest, so Header line changes layer when frozen
column->NavLayerCurrent = (ImS8)(table->FreezeRowsCount > 0 ? ImGuiNavLayer_Menu : (ImGuiNavLayer)table->NavLayer);
if (offset_x_frozen && table->FreezeColumnsCount == visible_n)
if (offset_x_frozen && table->FreezeColumnsCount == column_n)
{
offset_x += work_rect.Min.x - table->OuterRect.Min.x;
offset_x_frozen = false;
@@ -1212,11 +1206,10 @@ void ImGui::TableUpdateLayout(ImGuiTable* table)
column->CannotSkipItemsQueue >>= 1;
}
if (visible_n < table->FreezeColumnsCount)
if (column_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++;
}
// In case the table is visible (e.g. decorations) but all columns clipped, we keep a column visible.
@@ -1297,7 +1290,7 @@ void ImGui::TableUpdateLayout(ImGuiTable* table)
// [Part 13] Setup inner window decoration size (for scrolling / nav tracking to properly take account of frozen rows/columns)
if (table->FreezeColumnsRequest > 0)
table->InnerWindow->DecoInnerSizeX1 = table->Columns[table->DisplayOrderToIndex[table->FreezeColumnsRequest - 1]].MaxX - table->OuterRect.Min.x;
table->InnerWindow->DecoInnerSizeX1 = table->Columns[table->DisplayOrderToIndex[table->FreezeColumnsRequest - 1]].MaxX - table->OuterRect.Min.x; // FIXME-FROZEN
if (table->FreezeRowsRequest > 0)
table->InnerWindow->DecoInnerSizeY1 = table_instance->LastFrozenHeight;
table_instance->LastFrozenHeight = 0.0f;
@@ -3362,13 +3355,14 @@ void ImGui::TableAngledHeadersRowEx(ImGuiID row_id, float angle, float max_label
const ImVec2 header_angled_vector = unit_right * (row_height / -sin_a); // vector from bottom-left to top-left, and from bottom-right to top-right
// Declare row, override and draw our own background
// FIXME-TABLE: Generally broken when overlapping frozen columns limit.
TableNextRow(ImGuiTableRowFlags_Headers, row_height);
TableNextColumn();
const ImRect row_r(table->WorkRect.Min.x, table->BgClipRect.Min.y, table->WorkRect.Max.x, table->RowPosY2);
table->DrawSplitter->SetCurrentChannel(draw_list, TABLE_DRAW_CHANNEL_BG0);
float clip_rect_min_x = table->BgClipRect.Min.x;
if (table->FreezeColumnsCount > 0)
clip_rect_min_x = ImMax(clip_rect_min_x, table->Columns[table->FreezeColumnsCount - 1].MaxX);
clip_rect_min_x = ImMax(clip_rect_min_x, table->Columns[table->DisplayOrderToIndex[table->FreezeColumnsCount - 1]].MaxX);
TableSetBgColor(ImGuiTableBgTarget_RowBg0, 0); // Cancel
PushClipRect(table->BgClipRect.Min, table->BgClipRect.Max, false); // Span all columns
draw_list->AddRectFilled(ImVec2(table->BgClipRect.Min.x, row_r.Min.y), ImVec2(table->BgClipRect.Max.x, row_r.Max.y), GetColorU32(ImGuiCol_TableHeaderBg, 0.25f)); // FIXME-STYLE: Change row background with an arbitrary color.