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Tables: (breaking) renamed ImGuiTableColumnFlags_WidthAutoResize to _WidthAuto., default to WidthFixed policy when host window has auto-resize. 

Fix edge case with TableSetColumnWidth on small windows (amend 972ca816)
This commit is contained in:
ocornut 2020-12-22 22:32:30 +01:00
parent d497f112e7
commit 956435768f
3 changed files with 38 additions and 32 deletions
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31
imgui.h
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@ -1035,22 +1035,25 @@ enum ImGuiTabItemFlags_
};
// Flags for ImGui::BeginTable()
// - Important! Sizing policies have particularly complex and subtle side effects, more so than you would expect.
// - Important! Sizing policies have complex and subtle side effects, more so than you would expect.
// Read comments/demos carefully + experiment with live demos to get acquainted with them.
// - The default sizing policy for columns depends on whether the ScrollX flag is set on the table:
// When ScrollX is off:
// - The DEFAULT policy depends on whether the _ScrollX flag is set on the table, and whether _AlwaysAutoResize flag is set on window.
// - ImGuiTableFlags_ColumnsWidthStretch is the default if ScrollX if off.
// - ImGuiTableFlags_ColumnsWidthFixed is the default if ScrollX is on, or if host window has ImGuiWindowFlags_AlwaysAutoResize.
// - When ScrollX is off:
// - Table defaults to ImGuiTableFlags_ColumnsWidthStretch -> all Columns defaults to ImGuiTableColumnFlags_WidthStretch.
// - Columns sizing policy allowed: Stretch (default) or Fixed/Auto.
// - Fixed Columns will generally obtain their requested width (unless the Table cannot fit them all).
// - Columns sizing policy allowed: Stretch (default), Fixed/Auto.
// - Fixed Columns will generally obtain their requested width (unless the table cannot fit them all).
// - Stretch Columns will share the remaining width.
// When ScrollX is on:
// - Table defaults to ImGuiTableFlags_ColumnsWidthFixed -> all Columns defaults to ImGuiTableColumnFlags_WidthFixed.
// - Columns sizing policy allowed: Fixed/Auto mostly!
// - Mixed Fixed/Stretch columns is possible but has various side-effects on resizing behaviors.
// The typical use of mixing sizing policies is: any number of LEADING Fixed columns, followed by one or two TRAILING Stretch columns.
// (this is because the visible order of columns have subtle but necessary effects on how they react to manual resizing).
// - When ScrollX is on:
// - Table defaults to ImGuiTableFlags_ColumnsWidthFixed -> all Columns defaults to ImGuiTableColumnFlags_WidthFixed or ImGuiTableColumnFlags_WidthAuto
// - Columns sizing policy allowed: Fixed/Auto mostly.
// - Fixed Columns can be enlarged as needed. Table will show an horizontal scrollbar if needed.
// - Using Stretch columns OFTEN DOES NOT MAKE SENSE if ScrollX is on, UNLESS you have specified a value for 'inner_width' in BeginTable().
// - Mixing up columns with different sizing policy is possible BUT can be tricky and has some side-effects and restrictions.
// (their visible order and the scrolling state have subtle but necessary effects on how they can be manually resized).
// The typical use of mixing sizing policies is to have ScrollX disabled, first Fixed columns and then one or two TRAILING Stretch columns.
// If you specify a value for 'inner_width' then effectively the scrolling space is known and Stretch or mixed Fixed/Stretch columns become meaningful again.
enum ImGuiTableFlags_
{
// Features
@ -1076,7 +1079,7 @@ enum ImGuiTableFlags_
ImGuiTableFlags_NoBordersInBodyUntilResize = 1 << 12, // Disable vertical borders in columns Body until hovered for resize (borders will always appears in Headers).
// Sizing
ImGuiTableFlags_ColumnsWidthStretch = 1 << 13, // Default if ScrollX is off. Columns will default to use _WidthStretch. Read description above for more details.
ImGuiTableFlags_ColumnsWidthFixed = 1 << 14, // Default if ScrollX is on. Columns will default to use _WidthFixed or _WidthAutoResize policy (if Resizable is off). Read description above for more details.
ImGuiTableFlags_ColumnsWidthFixed = 1 << 14, // Default if ScrollX is on. Columns will default to use _WidthFixed or _WidthAuto policy (if Resizable is off). Read description above for more details.
ImGuiTableFlags_SameWidths = 1 << 15, // Make all columns the same widths which is useful with Fixed columns policy (but granted by default with Stretch policy + no resize). Implicitly enable ImGuiTableFlags_NoKeepColumnsVisible and disable ImGuiTableFlags_Resizable.
ImGuiTableFlags_NoHostExtendY = 1 << 16, // Disable extending table past the limit set by outer_size.y. Only meaningful when neither ScrollX nor ScrollY are set (data below the limit will be clipped and not visible)
ImGuiTableFlags_NoKeepColumnsVisible = 1 << 17, // Disable keeping column always minimally visible when ScrollX is off and table gets too small. Not recommended if columns are resizable.
@ -1104,7 +1107,7 @@ enum ImGuiTableColumnFlags_
ImGuiTableColumnFlags_DefaultSort = 1 << 1, // Default as a sorting column.
ImGuiTableColumnFlags_WidthStretch = 1 << 2, // Column will stretch. Preferable with horizontal scrolling disabled (default if table sizing policy is _ColumnsWidthStretch).
ImGuiTableColumnFlags_WidthFixed = 1 << 3, // Column will not stretch. Preferable with horizontal scrolling enabled (default if table sizing policy is _ColumnsWidthFixed and table is resizable).
ImGuiTableColumnFlags_WidthAutoResize = 1 << 4, // Column will not stretch and keep resizing based on submitted contents (default if table sizing policy is _ColumnsWidthFixed and table is not resizable).
ImGuiTableColumnFlags_WidthAuto = 1 << 4, // Column will not stretch and keep resizing based on submitted contents (default if table sizing policy is _ColumnsWidthFixed and table is not resizable). Generally compatible with using right-most fitting widgets (e.g. SetNextItemWidth(-FLT_MIN))
ImGuiTableColumnFlags_NoResize = 1 << 5, // Disable manual resizing.
ImGuiTableColumnFlags_NoReorder = 1 << 6, // Disable manual reordering this column, this will also prevent other columns from crossing over this column.
ImGuiTableColumnFlags_NoHide = 1 << 7, // Disable ability to hide/disable this column.
@ -1125,7 +1128,7 @@ enum ImGuiTableColumnFlags_
ImGuiTableColumnFlags_IsHovered = 1 << 23, // Status: is hovered by mouse
// [Internal] Combinations and masks
ImGuiTableColumnFlags_WidthMask_ = ImGuiTableColumnFlags_WidthStretch | ImGuiTableColumnFlags_WidthFixed | ImGuiTableColumnFlags_WidthAutoResize,
ImGuiTableColumnFlags_WidthMask_ = ImGuiTableColumnFlags_WidthStretch | ImGuiTableColumnFlags_WidthFixed | ImGuiTableColumnFlags_WidthAuto,
ImGuiTableColumnFlags_IndentMask_ = ImGuiTableColumnFlags_IndentEnable | ImGuiTableColumnFlags_IndentDisable,
ImGuiTableColumnFlags_StatusMask_ = ImGuiTableColumnFlags_IsEnabled | ImGuiTableColumnFlags_IsVisible | ImGuiTableColumnFlags_IsSorted | ImGuiTableColumnFlags_IsHovered,
ImGuiTableColumnFlags_NoDirectResize_ = 1 << 30 // [Internal] Disable user resizing this column directly (it may however we resized indirectly from its left edge)

4
imgui_demo.cpp
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@ -3357,8 +3357,8 @@ static void EditTableColumnsFlags(ImGuiTableColumnFlags* p_flags)
*p_flags &= ~(ImGuiTableColumnFlags_WidthMask_ ^ ImGuiTableColumnFlags_WidthStretch);
if (ImGui::CheckboxFlags("_WidthFixed", p_flags, ImGuiTableColumnFlags_WidthFixed))
*p_flags &= ~(ImGuiTableColumnFlags_WidthMask_ ^ ImGuiTableColumnFlags_WidthFixed);
if (ImGui::CheckboxFlags("_WidthAutoResize", p_flags, ImGuiTableColumnFlags_WidthAutoResize))
*p_flags &= ~(ImGuiTableColumnFlags_WidthMask_ ^ ImGuiTableColumnFlags_WidthAutoResize);
if (ImGui::CheckboxFlags("_WidthAuto", p_flags, ImGuiTableColumnFlags_WidthAuto))
*p_flags &= ~(ImGuiTableColumnFlags_WidthMask_ ^ ImGuiTableColumnFlags_WidthAuto);
ImGui::CheckboxFlags("_NoResize", p_flags, ImGuiTableColumnFlags_NoResize);
ImGui::CheckboxFlags("_NoReorder", p_flags, ImGuiTableColumnFlags_NoReorder);
ImGui::CheckboxFlags("_NoHide", p_flags, ImGuiTableColumnFlags_NoHide);

35
imgui_tables.cpp
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@ -98,12 +98,15 @@ Index of this file:
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// TABLES CULLING
// 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).
@ -193,7 +196,7 @@ inline ImGuiTableFlags TableFixFlags(ImGuiTableFlags flags, ImGuiWindow* outer_w
{
// Adjust flags: set default sizing policy
if ((flags & (ImGuiTableFlags_ColumnsWidthStretch | ImGuiTableFlags_ColumnsWidthFixed)) == 0)
flags |= (flags & ImGuiTableFlags_ScrollX) ? ImGuiTableFlags_ColumnsWidthFixed : ImGuiTableFlags_ColumnsWidthStretch;
flags |= ((flags & ImGuiTableFlags_ScrollX) || (outer_window->Flags & ImGuiWindowFlags_AlwaysAutoResize)) ? ImGuiTableFlags_ColumnsWidthFixed : ImGuiTableFlags_ColumnsWidthStretch;
// Adjust flags: disable Resizable when using SameWidths (done above enforcing BordersInnerV)
if (flags & ImGuiTableFlags_SameWidths)
@ -564,14 +567,14 @@ static void TableSetupColumnFlags(ImGuiTable* table, ImGuiTableColumn* column, I
// Sizing Policy
if ((flags & ImGuiTableColumnFlags_WidthMask_) == 0)
{
// FIXME-TABLE: Inconsistent to promote columns to WidthAutoResize
// FIXME-TABLE: Inconsistent to promote columns to WidthAuto
if (table->Flags & ImGuiTableFlags_ColumnsWidthFixed)
flags |= ((table->Flags & ImGuiTableFlags_Resizable) && !(flags & ImGuiTableColumnFlags_NoResize)) ? ImGuiTableColumnFlags_WidthFixed : ImGuiTableColumnFlags_WidthAutoResize;
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_WidthAutoResize)
if (flags & ImGuiTableColumnFlags_WidthAuto)
flags |= ImGuiTableColumnFlags_NoResize;
// Sorting
@ -609,9 +612,8 @@ static void TableSetupColumnFlags(ImGuiTable* table, ImGuiTableColumn* column, I
// 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 WidthAutoResize
// columns, increase feedback side-effect with widgets relying on WorkRect.Max.x. Maybe provide a default distribution
// for WidthAutoResize columns?
// 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;
@ -657,7 +659,7 @@ void ImGui::TableUpdateLayout(ImGuiTable* table)
table->IsSortSpecsDirty = true;
bool start_auto_fit = false;
if (column->Flags & (ImGuiTableColumnFlags_WidthFixed | ImGuiTableColumnFlags_WidthAutoResize))
if (column->Flags & (ImGuiTableColumnFlags_WidthFixed | ImGuiTableColumnFlags_WidthAuto))
start_auto_fit = column->WidthRequest < 0.0f;
else
start_auto_fit = column->StretchWeight < 0.0f;
@ -739,11 +741,11 @@ void ImGui::TableUpdateLayout(ImGuiTable* table)
}
column->IsPreserveWidthAuto = false;
if (column->Flags & (ImGuiTableColumnFlags_WidthFixed | ImGuiTableColumnFlags_WidthAutoResize))
if (column->Flags & (ImGuiTableColumnFlags_WidthFixed | ImGuiTableColumnFlags_WidthAuto))
{
// 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_WidthAutoResize) && column->IsVisibleX))
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
@ -786,7 +788,7 @@ void ImGui::TableUpdateLayout(ImGuiTable* table)
if (!(table->EnabledMaskByIndex & ((ImU64)1 << column_n)))
continue;
ImGuiTableColumn* column = &table->Columns[column_n];
if (column->Flags & (ImGuiTableColumnFlags_WidthFixed | ImGuiTableColumnFlags_WidthAutoResize))
if (column->Flags & (ImGuiTableColumnFlags_WidthFixed | ImGuiTableColumnFlags_WidthAuto))
{
sum_width_fixed_requests += max_width_auto - column->WidthRequest; // Update old sum
column->WidthRequest = max_width_auto;
@ -978,7 +980,7 @@ void ImGui::TableUpdateLayout(ImGuiTable* table)
// [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 _WidthAutoResize/_WidthStretch). This will hide the resizing option from the context menu.
// 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)
{
@ -1279,7 +1281,7 @@ void ImGui::TableSetupColumn(const char* label, ImGuiTableColumnFlags flags, flo
table->DeclColumnsCount++;
// When passing a width automatically enforce WidthFixed policy
// (whereas TableSetupColumnFlags would default to WidthAutoResize)
// (whereas TableSetupColumnFlags would default to WidthAuto)
if ((flags & ImGuiTableColumnFlags_WidthMask_) == 0)
if ((table->Flags & ImGuiTableFlags_ColumnsWidthFixed) && (init_width_or_weight > 0.0f))
flags |= ImGuiTableColumnFlags_WidthFixed;
@ -1871,7 +1873,7 @@ 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();
const float max_width = TableGetMaxColumnWidth(table, column_n);
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)
return;
@ -1931,6 +1933,7 @@ void ImGui::TableSetColumnWidth(int column_n, float width)
// (old_a + old_b == new_a + new_b) --> (new_a == old_a + old_b - new_b)
float column_1_width = ImMax(column_1->WidthRequest - (column_0_width - column_0->WidthRequest), min_width);
column_0_width = column_0->WidthRequest + column_1->WidthRequest - column_1_width;
IM_ASSERT(column_0_width > 0.0f && column_1_width > 0.0f);
column_0->WidthRequest = column_0_width;
column_1->WidthRequest = column_1_width;
if ((column_0->Flags | column_1->Flags) & ImGuiTableColumnFlags_WidthStretch)
@ -3321,7 +3324,7 @@ void ImGui::DebugNodeTable(ImGuiTable* table)
column->SortOrder, (column->SortDirection == ImGuiSortDirection_Ascending) ? " (Asc)" : (column->SortDirection == ImGuiSortDirection_Descending) ? " (Des)" : "", column->UserID, column->Flags,
(column->Flags & ImGuiTableColumnFlags_WidthStretch) ? "WidthStretch " : "",
(column->Flags & ImGuiTableColumnFlags_WidthFixed) ? "WidthFixed " : "",
(column->Flags & ImGuiTableColumnFlags_WidthAutoResize) ? "WidthAutoResize " : "",
(column->Flags & ImGuiTableColumnFlags_WidthAuto) ? "WidthAuto " : "",
(column->Flags & ImGuiTableColumnFlags_NoResize) ? "NoResize " : "");
Bullet();
Selectable(buf);