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Selectable: Avoid pushing span-column background if clipped.

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This commit is contained in:
ocornut 2020-11-04 20:11:34 +01:00
parent 7a27b2a282
commit 046057cebb
1 changed files with 22 additions and 8 deletions
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30
imgui_widgets.cpp
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@ -5909,10 +5909,6 @@ bool ImGui::Selectable(const char* label, bool selected, ImGuiSelectableFlags fl
ImGuiContext& g = *GImGui;
const ImGuiStyle& style = g.Style;
const bool span_all_columns = (flags & ImGuiSelectableFlags_SpanAllColumns) != 0;
if (span_all_columns && window->DC.CurrentColumns) // FIXME-OPT: Avoid if vertically clipped.
PushColumnsBackground();
// Submit label or explicit size to ItemSize(), whereas ItemAdd() will submit a larger/spanning rectangle.
ImGuiID id = window->GetID(label);
ImVec2 label_size = CalcTextSize(label, NULL, true);
@ -5923,6 +5919,7 @@ bool ImGui::Selectable(const char* label, bool selected, ImGuiSelectableFlags fl
// Fill horizontal space
// We don't support (size < 0.0f) in Selectable() because the ItemSpacing extension would make explicitely right-aligned sizes not visibly match other widgets.
const bool span_all_columns = (flags & ImGuiSelectableFlags_SpanAllColumns) != 0;
const float min_x = span_all_columns ? window->ParentWorkRect.Min.x : pos.x;
const float max_x = span_all_columns ? window->ParentWorkRect.Max.x : window->WorkRect.Max.x;
if (size_arg.x == 0.0f || (flags & ImGuiSelectableFlags_SpanAvailWidth))
@ -5947,6 +5944,15 @@ bool ImGui::Selectable(const char* label, bool selected, ImGuiSelectableFlags fl
}
//if (g.IO.KeyCtrl) { GetForegroundDrawList()->AddRect(bb.Min, bb.Max, IM_COL32(0, 255, 0, 255)); }
// Modify ClipRect for the ItemAdd(), faster than doing a PushColumnsBackground/PushTableBackground for every Selectable..
const float backup_clip_rect_min_x = window->ClipRect.Min.x;
const float backup_clip_rect_max_x = window->ClipRect.Max.x;
if (span_all_columns)
{
window->ClipRect.Min.x = window->ParentWorkRect.Min.x;
window->ClipRect.Max.x = window->ParentWorkRect.Max.x;
}
bool item_add;
if (flags & ImGuiSelectableFlags_Disabled)
{
@ -5959,13 +5965,21 @@ bool ImGui::Selectable(const char* label, bool selected, ImGuiSelectableFlags fl
{
item_add = ItemAdd(bb, id);
}
if (!item_add)
if (span_all_columns)
{
if (span_all_columns && window->DC.CurrentColumns)
PopColumnsBackground();
return false;
window->ClipRect.Min.x = backup_clip_rect_min_x;
window->ClipRect.Max.x = backup_clip_rect_max_x;
}
if (!item_add)
return false;
// FIXME: We can standardize the behavior of those two, we could also keep the fast path of override ClipRect + full push on render only,
// which would be advantageous since most selectable are not selected.
if (span_all_columns && window->DC.CurrentColumns)
PushColumnsBackground();
// We use NoHoldingActiveID on menus so user can click and _hold_ on a menu then drag to browse child entries
ImGuiButtonFlags button_flags = 0;
if (flags & ImGuiSelectableFlags_NoHoldingActiveID) { button_flags |= ImGuiButtonFlags_NoHoldingActiveId; }