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Tables: explicit/custom width in TableSetupColumn() is reapplied when table or column becomes not resizable. Comments.

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This commit is contained in:
ocornut 2020-12-23 12:11:39 +01:00
parent 956435768f
commit 3fbb928c9f
3 changed files with 30 additions and 16 deletions
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3
imgui.h
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@ -1049,11 +1049,12 @@ enum ImGuiTabItemFlags_
// 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
// - 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().
// 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.
// - Read on documentation at the top of imgui_tables.cpp for details.
enum ImGuiTableFlags_
{
// Features

1
imgui_demo.cpp
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@ -3912,6 +3912,7 @@ static void ShowDemoWindowTables()
static int freeze_rows = 1;
PushStyleCompact();
ImGui::CheckboxFlags("ImGuiTableFlags_Resizable", &flags, ImGuiTableFlags_Resizable);
ImGui::CheckboxFlags("ImGuiTableFlags_ScrollX", &flags, ImGuiTableFlags_ScrollX);
ImGui::CheckboxFlags("ImGuiTableFlags_ScrollY", &flags, ImGuiTableFlags_ScrollY);
ImGui::SetNextItemWidth(ImGui::GetFrameHeight());

42
imgui_tables.cpp
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@ -97,6 +97,25 @@ Index of this file:
// 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_ColumnsWidthStretch --> default Column policy is ImGuiTableColumnFlags_WidthStretch
// - When Table policy ImGuiTableFlags_ColumnsWidthFixed and (Table is Resizable or init_width > 0) --> default Column policy is ImGuiTableColumnFlags_WidthFixed
// - When Table policy ImGuiTableFlags_ColumnsWidthFixed and (Table is not Resizable and init_width <= 0) --> default Column policy is ImGuiTableColumnFlags_WidthAuto
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// TABLES CLIPPING/CULLING
//-----------------------------------------------------------------------------
@ -730,19 +749,17 @@ void ImGui::TableUpdateLayout(ImGuiTable* table)
float width_auto = content_width_body;
if (!(column->Flags & ImGuiTableColumnFlags_NoHeaderWidth))
width_auto = ImMax(width_auto, content_width_headers);
width_auto = ImMax(width_auto, min_column_width);
// Non-resizable columns also submit 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);
column->WidthAuto = width_auto;
column->WidthAuto = ImMax(width_auto, min_column_width);
}
column->IsPreserveWidthAuto = false;
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);
// 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))
@ -1258,12 +1275,7 @@ void ImGui::EndTable()
outer_window->DC.CurrentTableIdx = g.CurrentTable ? g.Tables.GetIndex(g.CurrentTable) : -1;
}
// We use a default parameter of 'init_width_or_weight == -1',
// - with ImGuiTableColumnFlags_WidthFixed, width <= 0 --> init width == auto
// - with ImGuiTableColumnFlags_WidthFixed, width > 0 --> init width == manual
// - with ImGuiTableColumnFlags_WidthStretch, weight < 0 --> init weight == 1.0f
// - with ImGuiTableColumnFlags_WidthStretch, weight >= 0 --> init weight == custom
// Widths are specified _without_ CellPadding. So if you specify a width of 100.0f the column will be 100.0f+Padding*2.0f and you can fit a 100.0-wide item in it.
// See "COLUMN SIZING POLICIES" comments at the top of this file
void ImGui::TableSetupColumn(const char* label, ImGuiTableColumnFlags flags, float init_width_or_weight, ImGuiID user_id)
{
ImGuiContext& g = *GImGui;
@ -1281,7 +1293,7 @@ void ImGui::TableSetupColumn(const char* label, ImGuiTableColumnFlags flags, flo
table->DeclColumnsCount++;
// When passing a width automatically enforce WidthFixed policy
// (whereas TableSetupColumnFlags would default to WidthAuto)
// (whereas TableSetupColumnFlags would default to WidthAuto if table is not Resizable)
if ((flags & ImGuiTableColumnFlags_WidthMask_) == 0)
if ((table->Flags & ImGuiTableFlags_ColumnsWidthFixed) && (init_width_or_weight > 0.0f))
flags |= ImGuiTableColumnFlags_WidthFixed;