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Tables: report auto-fit width in EndTable(), extracted TableGetColumnWidthAuto(). fix minor flickering with IsPreserveWidthAuto (which is a debug feature still), moved some code.

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This commit is contained in:
ocornut 2020-12-25 14:35:57 +01:00
parent 3573195112
commit 68faa16e1d
2 changed files with 67 additions and 55 deletions
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5
imgui_internal.h
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@ -2002,6 +2002,7 @@ struct ImGuiTable
float BorderX1;
float BorderX2;
float HostIndentX;
float MinColumnWidth;
float OuterPaddingX;
float CellPaddingX; // Padding from each borders
float CellPaddingY;
@ -2010,7 +2011,7 @@ struct ImGuiTable
float LastOuterHeight; // Outer height from last frame
float LastFirstRowHeight; // Height of first row from last frame
float InnerWidth; // User value passed to BeginTable(), see comments at the top of BeginTable() for details.
float ColumnsTotalWidth; // Sum of current column width
float ColumnsGivenWidth; // Sum of current column width
float ColumnsAutoFitWidth; // Sum of ideal column width in order nothing to be clipped, used for auto-fitting and content width submission in outer window
float ResizedColumnNextWidth;
float ResizeLockMinContentsX2; // Lock minimum contents width while resizing down in order to not create feedback loops. But we allow growing the table.
@ -2317,6 +2318,7 @@ namespace ImGui
IMGUI_API void TableSortSpecsBuild(ImGuiTable* table);
IMGUI_API ImGuiSortDirection TableGetColumnNextSortDirection(ImGuiTableColumn* column);
IMGUI_API void TableFixColumnSortDirection(ImGuiTable* table, ImGuiTableColumn* column);
IMGUI_API float TableGetColumnWidthAuto(ImGuiTable* table, ImGuiTableColumn* column);
IMGUI_API void TableBeginRow(ImGuiTable* table);
IMGUI_API void TableEndRow(ImGuiTable* table);
IMGUI_API void TableBeginCell(ImGuiTable* table, int column_n);
@ -2324,7 +2326,6 @@ namespace ImGui
IMGUI_API ImRect TableGetCellBgRect(const ImGuiTable* table, int column_n);
IMGUI_API const char* TableGetColumnName(const ImGuiTable* table, int column_n);
IMGUI_API ImGuiID TableGetColumnResizeID(const ImGuiTable* table, int column_n, int instance_no = 0);
IMGUI_API float TableGetMinColumnWidth();
IMGUI_API float TableGetMaxColumnWidth(const ImGuiTable* table, int column_n);
IMGUI_API void TableSetColumnWidthAutoSingle(ImGuiTable* table, int column_n);
IMGUI_API void TableSetColumnWidthAutoAll(ImGuiTable* table);

117
imgui_tables.cpp
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@ -638,14 +638,16 @@ void ImGui::TableUpdateLayout(ImGuiTable* table)
ImGuiContext& g = *GImGui;
IM_ASSERT(table->IsLayoutLocked == false);
// [Part 1] Apply/lock Enabled and Order states.
// Process columns in their visible orders as we are building the Prev/Next indices.
int last_visible_column_idx = -1;
bool want_column_auto_fit = 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.
// 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];
@ -686,7 +688,7 @@ void ImGui::TableUpdateLayout(ImGuiTable* table)
column->AutoFitQueue = column->CannotSkipItemsQueue = (1 << 3) - 1; // Fit for three frames
if (column->AutoFitQueue != 0x00)
want_column_auto_fit = true;
want_auto_fit = true;
ImU64 index_mask = (ImU64)1 << column_n;
ImU64 display_order_mask = (ImU64)1 << column->DisplayOrder;
@ -717,13 +719,12 @@ void ImGui::TableUpdateLayout(ImGuiTable* table)
// [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_column_auto_fit && table->OuterWindow != table->InnerWindow)
if (want_auto_fit && table->OuterWindow != table->InnerWindow)
table->InnerWindow->SkipItems = false;
if (want_column_auto_fit)
if (want_auto_fit)
table->IsSettingsDirty = true;
// [Part 3] Fix column flags. Calculate ideal width for columns. Count how many fixed/stretch columns we have and sum of weights.
const float min_column_width = TableGetMinColumnWidth();
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.
@ -743,22 +744,14 @@ void ImGui::TableUpdateLayout(ImGuiTable* table)
// 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)
{
const float content_width_body = ImMax(column->ContentMaxXFrozen, column->ContentMaxXUnfrozen) - column->WorkMinX;
const float content_width_headers = column->ContentMaxXHeadersIdeal - column->WorkMinX;
float width_auto = content_width_body;
if (!(column->Flags & ImGuiTableColumnFlags_NoHeaderWidth))
width_auto = ImMax(width_auto, content_width_headers);
column->WidthAuto = ImMax(width_auto, min_column_width);
}
column->IsPreserveWidthAuto = false;
column->WidthAuto = TableGetColumnWidthAuto(table, column);
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);
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!)
@ -770,8 +763,9 @@ void ImGui::TableUpdateLayout(ImGuiTable* table)
// 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?
if (column->AutoFitQueue > 0x01 && table->IsInitializing)
column->WidthRequest = ImMax(column->WidthRequest, min_column_width * 4.0f); // FIXME-TABLE: Another constant/scale?
// 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;
}
@ -789,6 +783,7 @@ void ImGui::TableUpdateLayout(ImGuiTable* table)
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;
}
@ -826,8 +821,7 @@ void ImGui::TableUpdateLayout(ImGuiTable* table)
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->ColumnsTotalWidth = width_spacings;
table->ColumnsAutoFitWidth = width_spacings;
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)))
@ -838,7 +832,7 @@ void ImGui::TableUpdateLayout(ImGuiTable* table)
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, min_column_width) + 0.01f);
column->WidthRequest = IM_FLOOR(ImMax(width_avail_for_stretched_columns * weight_ratio, table->MinColumnWidth) + 0.01f);
width_remaining_for_stretched_columns -= column->WidthRequest;
}
@ -848,9 +842,8 @@ void ImGui::TableUpdateLayout(ImGuiTable* table)
column->Flags |= ImGuiTableColumnFlags_NoDirectResize_;
// Assign final width, record width in case we will need to shrink
column->WidthGiven = ImFloor(ImMax(column->WidthRequest, min_column_width));
table->ColumnsTotalWidth += column->WidthGiven + table->CellPaddingX * 2.0f;
table->ColumnsAutoFitWidth += column->WidthAuto + table->CellPaddingX * 2.0f;
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).
@ -919,7 +912,7 @@ void ImGui::TableUpdateLayout(ImGuiTable* table)
// 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, min_column_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
@ -1175,16 +1168,6 @@ void ImGui::EndTable()
if ((flags & ImGuiTableFlags_Borders) != 0)
TableDrawBorders(table);
// Store content width reference for each column (before attempting to merge draw calls)
const float backup_outer_cursor_pos_x = outer_window->DC.CursorPos.x;
const float backup_outer_max_pos_x = outer_window->DC.CursorMaxPos.x;
const float backup_inner_max_pos_x = inner_window->DC.CursorMaxPos.x;
float max_pos_x = backup_inner_max_pos_x;
if (table->RightMostEnabledColumn != -1)
max_pos_x = ImMax(max_pos_x, table->Columns[table->RightMostEnabledColumn].MaxX);
if (table->ResizedColumn != -1)
max_pos_x = ImMax(max_pos_x, table->ResizeLockMinContentsX2);
#if 0
// Strip out dummy channel draw calls
// We have no way to prevent user submitting direct ImDrawList calls into a hidden column (but ImGui:: calls will be clipped out)
@ -1204,14 +1187,22 @@ void ImGui::EndTable()
TableMergeDrawChannels(table);
table->DrawSplitter.Merge(inner_window->DrawList);
if (!(table->Flags & ImGuiTableFlags_ScrollX) && inner_window != outer_window)
// Update ColumnsAutoFitWidth to get us ahead for host using our size to auto-resize without waiting for next BeginTable()
const float width_spacings = (table->OuterPaddingX * 2.0f) + (table->CellSpacingX1 + table->CellSpacingX2) * (table->ColumnsEnabledCount - 1);
table->ColumnsAutoFitWidth = 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))
table->ColumnsAutoFitWidth += TableGetColumnWidthAuto(table, &table->Columns[column_n]);
// Update scroll
if ((table->Flags & ImGuiTableFlags_ScrollX) == 0 && inner_window != outer_window)
{
inner_window->Scroll.x = 0.0f;
}
else if (table->LastResizedColumn != -1 && table->ResizedColumn == -1 && inner_window->ScrollbarX && table->InstanceInteracted == table->InstanceCurrent)
{
// When releasing a column being resized, scroll to keep the resulting column in sight
const float neighbor_width_to_keep_visible = TableGetMinColumnWidth() + table->CellPaddingX * 2.0f;
const float neighbor_width_to_keep_visible = table->MinColumnWidth + table->CellPaddingX * 2.0f;
ImGuiTableColumn* column = &table->Columns[table->LastResizedColumn];
if (column->MaxX < table->InnerClipRect.Min.x)
SetScrollFromPosX(inner_window, column->MaxX - inner_window->Pos.x - neighbor_width_to_keep_visible, 1.0f);
@ -1228,10 +1219,20 @@ void ImGui::EndTable()
table->ResizedColumnNextWidth = new_width;
}
// Layout in outer window
// Pop from id stack
IM_ASSERT_USER_ERROR(inner_window->IDStack.back() == table->ID + table->InstanceCurrent, "Mismatching PushID/PopID!");
IM_ASSERT_USER_ERROR(outer_window->DC.ItemWidthStack.Size >= table->HostBackupItemWidthStackSize, "Too many PopItemWidth!");
PopID();
// Layout in outer window
const float backup_outer_cursor_pos_x = outer_window->DC.CursorPos.x;
const float backup_outer_max_pos_x = outer_window->DC.CursorMaxPos.x;
const float backup_inner_max_pos_x = inner_window->DC.CursorMaxPos.x;
float max_pos_x = backup_inner_max_pos_x;
if (table->RightMostEnabledColumn != -1)
max_pos_x = ImMax(max_pos_x, table->Columns[table->RightMostEnabledColumn].MaxX);
if (table->ResizedColumn != -1)
max_pos_x = ImMax(max_pos_x, table->ResizeLockMinContentsX2);
inner_window->WorkRect = table->HostBackupWorkRect;
inner_window->ParentWorkRect = table->HostBackupParentWorkRect;
inner_window->SkipItems = table->HostSkipItems;
@ -1255,7 +1256,7 @@ void ImGui::EndTable()
if (table->Flags & ImGuiTableFlags_ScrollX)
{
inner_window->DC.CursorMaxPos.x = max_pos_x; // Set contents width for scrolling
outer_window->DC.CursorMaxPos.x = ImMax(backup_outer_max_pos_x, backup_outer_cursor_pos_x + table->ColumnsTotalWidth + inner_window->ScrollbarSizes.x); // For auto-fit
outer_window->DC.CursorMaxPos.x = ImMax(backup_outer_max_pos_x, backup_outer_cursor_pos_x + table->ColumnsGivenWidth + inner_window->ScrollbarSizes.x); // For scrolling
}
else
{
@ -1825,28 +1826,20 @@ void ImGui::TableEndCell(ImGuiTable* table)
//-------------------------------------------------------------------------
// [SECTION] Tables: Columns width management
//-------------------------------------------------------------------------
// - TableGetMinColumnWidth() [Internal]
// - TableGetMaxColumnWidth() [Internal]
// - TableGetColumnWidthAuto() [Internal]
// - TableSetColumnWidth()
// - TableSetColumnWidthAutoSingle() [Internal]
// - TableSetColumnWidthAutoAll() [Internal]
// - TableUpdateColumnsWeightFromWidth() [Internal]
//-------------------------------------------------------------------------
// Minimum column content width (without padding)
float ImGui::TableGetMinColumnWidth()
{
ImGuiContext& g = *GImGui;
//return g.Style.ColumnsMinSpacing; // FIXME-TABLE
return g.Style.FramePadding.x * 1.0f;
}
// Maximum column content width given current layout. Use column->MinX so this value on a per-column basis.
float ImGui::TableGetMaxColumnWidth(const ImGuiTable* table, int column_n)
{
const ImGuiTableColumn* column = &table->Columns[column_n];
float max_width = FLT_MAX;
const float min_column_distance = TableGetMinColumnWidth() + table->CellPaddingX * 2.0f + table->CellSpacingX1 + table->CellSpacingX2;
const float min_column_distance = table->MinColumnWidth + table->CellPaddingX * 2.0f + table->CellSpacingX1 + table->CellSpacingX2;
if (table->Flags & ImGuiTableFlags_ScrollX)
{
// Frozen columns can't reach beyond visible width else scrolling will naturally break.
@ -1872,6 +1865,23 @@ float ImGui::TableGetMaxColumnWidth(const ImGuiTable* table, int column_n)
return max_width;
}
// Note this is meant to be stored in column->WidthAuto, please generally use the WidthAuto field
float ImGui::TableGetColumnWidthAuto(ImGuiTable* table, ImGuiTableColumn* column)
{
const float content_width_body = ImMax(column->ContentMaxXFrozen, column->ContentMaxXUnfrozen) - column->WorkMinX;
const float content_width_headers = column->ContentMaxXHeadersIdeal - column->WorkMinX;
float width_auto = content_width_body;
if (!(column->Flags & ImGuiTableColumnFlags_NoHeaderWidth))
width_auto = ImMax(width_auto, content_width_headers);
// Non-resizable fixed columns preserve their requested width
if ((column->Flags & ImGuiTableColumnFlags_WidthFixed) && column->InitStretchWeightOrWidth > 0.0f)
if (!(table->Flags & ImGuiTableFlags_Resizable) || (column->Flags & ImGuiTableColumnFlags_NoResize))
width_auto = ImMax(width_auto, column->InitStretchWeightOrWidth);
return ImMax(width_auto, table->MinColumnWidth);
}
// 'width' = inner column width, without padding
void ImGui::TableSetColumnWidth(int column_n, float width)
{
@ -1884,7 +1894,8 @@ void ImGui::TableSetColumnWidth(int column_n, float width)
// Apply constraints early
// Compare both requested and actual given width to avoid overwriting requested width when column is stuck (minimum size, bounded)
const float min_width = TableGetMinColumnWidth();
IM_ASSERT(table->MinColumnWidth > 0.0f);
const float min_width = table->MinColumnWidth;
const float max_width = ImMax(min_width, TableGetMaxColumnWidth(table, column_n));
column_0_width = ImClamp(column_0_width, min_width, max_width);
if (column_0->WidthGiven == column_0_width || column_0->WidthRequest == column_0_width)
@ -3308,7 +3319,7 @@ void ImGui::DebugNodeTable(ImGuiTable* table)
return;
bool clear_settings = SmallButton("Clear settings");
BulletText("OuterRect: Pos: (%.1f,%.1f) Size: (%.1f,%.1f)", table->OuterRect.Min.x, table->OuterRect.Min.y, table->OuterRect.GetWidth(), table->OuterRect.GetHeight());
BulletText("ColumnsWidth: %.1f, AutoFitWidth: %.1f, InnerWidth: %.1f%s", table->ColumnsTotalWidth, table->ColumnsAutoFitWidth, table->InnerWidth, table->InnerWidth == 0.0f ? " (auto)" : "");
BulletText("ColumnsGivenWidth: %.1f, ColumnsAutoFitWidth: %.1f, InnerWidth: %.1f%s", table->ColumnsGivenWidth, table->ColumnsAutoFitWidth, table->InnerWidth, table->InnerWidth == 0.0f ? " (auto)" : "");
BulletText("CellPaddingX: %.1f, CellSpacingX: %.1f/%.1f, OuterPaddingX: %.1f", table->CellPaddingX, table->CellSpacingX1, table->CellSpacingX2, table->OuterPaddingX);
BulletText("HoveredColumnBody: %d, HoveredColumnBorder: %d", table->HoveredColumnBody, table->HoveredColumnBorder);
BulletText("ResizedColumn: %d, ReorderColumn: %d, HeldHeaderColumn: %d", table->ResizedColumn, table->ReorderColumn, table->HeldHeaderColumn);