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Tables: Made demo options consistently compact, replaced constants with font-based sizes, added comments on memory allocations.

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This commit is contained in:
ocornut
2020-10-07 16:33:33 +02:00
parent 02b27b75a4
commit 77e561aaf3
2 changed files with 166 additions and 109 deletions
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10
imgui_tables.cpp
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@ -312,6 +312,14 @@ bool ImGui::BeginTableEx(const char* name, ImGuiID id, int columns_count, ImG
table->RawData.resize(0);
if (table->RawData.Size == 0)
{
// For reference, the total _allocation count_ for a table is:
// + 0 (for ImGuiTable instance, we sharing allocation in g.Tables pool)
// + 1 (for table->RawData allocated below)
// + 1 (for table->Splitter._Channels)
// + 2 * active_channels_count (for ImDrawCmd and ImDrawIdx buffers inside channels)
// Where active_channels_count is variable but often == columns_count or columns_count + 1, see TableUpdateDrawChannels() for details.
// Unused channels don't perform their +2 allocations.
// Allocate single buffer for our arrays
ImSpanAllocator<3> span_allocator;
span_allocator.ReserveBytes(0, columns_count * sizeof(ImGuiTableColumn));
@ -957,7 +965,7 @@ void ImGui::TableUpdateBorders(ImGuiTable* table)
if (column->Flags & (ImGuiTableColumnFlags_NoResize | ImGuiTableColumnFlags_NoDirectResize_))
continue;
// ImGuiTableFlags_NoBordersInBodyUntilResize will be honored in TableDrawBorders()
// ImGuiTableFlags_NoBordersInBodyUntilResize will be honored in TableDrawBorders()
const float border_y2_hit = (table->Flags & ImGuiTableFlags_NoBordersInBody) ? hit_y2_head : hit_y2_body;
if ((table->Flags & ImGuiTableFlags_NoBordersInBody) && table->IsUsingHeaders == false)
continue;