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Tables: Fix calculation of auto-fit (remove padding). Demo setting a width in columns setup + ImGuiTableFlags_NoKeepColumnsVisible.

This commit is contained in:
omar 2020-07-17 23:23:04 +02:00 committed by ocornut
parent c96c84b6dc
commit a0e6aa1766
3 changed files with 33 additions and 6 deletions
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2
imgui.h
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@ -1041,7 +1041,7 @@ enum ImGuiTableFlags_
ImGuiTableFlags_SizingPolicyStretchX = 1 << 14, // Default if ScrollX is off. Columns will default to use _WidthStretch policy. Read description above for more details.
ImGuiTableFlags_NoHeadersWidth = 1 << 15, // Disable header width contribution to automatic width calculation.
ImGuiTableFlags_NoHostExtendY = 1 << 16, // (FIXME-TABLE: Reword as SizingPolicy?) Disable extending past the limit set by outer_size.y, only meaningful when neither of ScrollX|ScrollY are set (data below the limit will be clipped and not visible)
ImGuiTableFlags_NoKeepColumnsVisible = 1 << 17, // (FIXME-TABLE) Disable code that keeps column always minimally visible when table width gets too small.
ImGuiTableFlags_NoKeepColumnsVisible = 1 << 17, // (FIXME-TABLE) Disable code that keeps column always minimally visible when table width gets too small and horizontal scrolling is off.
// Scrolling
ImGuiTableFlags_ScrollX = 1 << 18, // Enable horizontal scrolling. Require 'outer_size' parameter of BeginTable() to specify the container size. Because this create a child window, ScrollY is currently generally recommended when using ScrollX.
ImGuiTableFlags_ScrollY = 1 << 19, // Enable vertical scrolling. Require 'outer_size' parameter of BeginTable() to specify the container size.

28
imgui_demo.cpp
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@ -3596,6 +3596,32 @@ static void ShowDemoWindowTables()
ImGui::TreePop();
}
if (open_action != -1)
ImGui::SetNextItemOpen(open_action != 0);
if (ImGui::TreeNode("Explicit widths"))
{
static ImGuiTableFlags flags = ImGuiTableFlags_None;
ImGui::CheckboxFlags("ImGuiTableFlags_NoKeepColumnsVisible", (unsigned int*)&flags, ImGuiTableFlags_NoKeepColumnsVisible);
if (ImGui::BeginTable("##table1", 3, flags))
{
// We could also set ImGuiTableFlags_SizingPolicyFixedX on the table and all columns will default to ImGuiTableColumnFlags_WidthFixed.
ImGui::TableSetupColumn("", ImGuiTableColumnFlags_WidthFixed, 100.0f);
ImGui::TableSetupColumn("", ImGuiTableColumnFlags_WidthFixed, 200.0f);
ImGui::TableSetupColumn("", ImGuiTableColumnFlags_WidthFixed, 100.0f);
for (int row = 0; row < 5; row++)
{
ImGui::TableNextRow();
for (int column = 0; column < 3; column++)
{
ImGui::TableSetColumnIndex(column);
ImGui::Text("Hello %d,%d", row, column);
}
}
ImGui::EndTable();
}
ImGui::TreePop();
}
if (open_action != -1)
ImGui::SetNextItemOpen(open_action != 0);
if (ImGui::TreeNode("Vertical scrolling, with clipping"))
@ -4223,6 +4249,8 @@ static void ShowDemoWindowTables()
ImGui::SameLine(); HelpMarker("[Default if ScrollX is on]\nEnlarge as needed: enable scrollbar if ScrollX is enabled, otherwise extend parent window's contents rectangle. Only Fixed columns allowed. Stretched columns will calculate their width assuming no scrolling.");
ImGui::CheckboxFlags("ImGuiTableFlags_NoHeadersWidth", (unsigned int*)&flags, ImGuiTableFlags_NoHeadersWidth);
ImGui::CheckboxFlags("ImGuiTableFlags_NoHostExtendY", (unsigned int*)&flags, ImGuiTableFlags_NoHostExtendY);
ImGui::CheckboxFlags("ImGuiTableFlags_NoKeepColumnsVisible", (unsigned int*)&flags, ImGuiTableFlags_NoKeepColumnsVisible);
ImGui::SameLine(); HelpMarker("Only available if ScrollX is disabled.");
ImGui::Unindent();
ImGui::BulletText("Scrolling:");

9
imgui_tables.cpp
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@ -580,7 +580,6 @@ void ImGui::TableUpdateLayout(ImGuiTable* table)
// (can't make auto padding larger than what WorkRect knows about so right-alignment matches)
const ImRect work_rect = table->WorkRect;
const float padding_auto_x = table->CellPaddingX2;
const float spacing_auto_x = table->CellSpacingX * (1.0f + 2.0f); // CellSpacingX is >0.0f when there's no vertical border, in which case we add two extra CellSpacingX to make auto-fit look nice instead of cramped. We may want to expose this somehow.
const float min_column_width = TableGetMinColumnWidth();
int count_fixed = 0;
@ -614,7 +613,11 @@ void ImGui::TableUpdateLayout(ImGuiTable* table)
if (!(table->Flags & ImGuiTableFlags_NoHeadersWidth) && !(column->Flags & ImGuiTableColumnFlags_NoHeaderWidth))
column_width_ideal = ImMax(column_width_ideal, column_content_width_headers);
column_width_ideal = ImMax(column_width_ideal + padding_auto_x, min_column_width);
// CellSpacingX is >0.0f when there's no vertical border
table->ColumnsAutoFitWidth += column_width_ideal;
if (column->PrevVisibleColumn != -1)
table->ColumnsAutoFitWidth += table->CellSpacingX;
if (column->Flags & (ImGuiTableColumnFlags_WidthAlwaysAutoResize | ImGuiTableColumnFlags_WidthFixed))
{
@ -647,10 +650,6 @@ void ImGui::TableUpdateLayout(ImGuiTable* table)
}
}
// CellSpacingX is >0.0f when there's no vertical border, in which case we add two extra CellSpacingX to make auto-fit look nice instead of cramped.
// We may want to expose this somehow.
table->ColumnsAutoFitWidth += spacing_auto_x * (table->ColumnsVisibleCount - 1);
// Layout
const float width_spacings = table->CellSpacingX * (table->ColumnsVisibleCount - 1);
float width_avail;