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MultiSelect: added support for nested/stacked BeginMultiSelect().

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Mimicking table logic, reusing amortized buffers.
This commit is contained in:
ocornut 2023-10-26 17:20:33 +02:00
parent b747d6fe59
commit 0af6fbb51d
4 changed files with 19 additions and 7 deletions
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14
imgui_widgets.cpp
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@ -7156,8 +7156,10 @@ ImGuiMultiSelectIO* ImGui::BeginMultiSelect(ImGuiMultiSelectFlags flags)
{
ImGuiContext& g = *GImGui;
ImGuiWindow* window = g.CurrentWindow;
ImGuiMultiSelectTempData* ms = &g.MultiSelectTempData[0];
IM_ASSERT(g.CurrentMultiSelect == NULL); // No recursion allowed yet (we could allow it if we deem it useful)
if (++g.MultiSelectTempDataStacked > g.MultiSelectTempData.Size)
g.MultiSelectTempData.resize(g.MultiSelectTempDataStacked, ImGuiMultiSelectTempData());
ImGuiMultiSelectTempData* ms = &g.MultiSelectTempData[g.MultiSelectTempDataStacked - 1];
IM_STATIC_ASSERT(offsetof(ImGuiMultiSelectTempData, IO) == 0); // Clear() relies on that.
g.CurrentMultiSelect = ms;
if ((flags & (ImGuiMultiSelectFlags_ScopeWindow | ImGuiMultiSelectFlags_ScopeRect)) == 0)
@ -7276,6 +7278,7 @@ ImGuiMultiSelectIO* ImGui::EndMultiSelect()
ImGuiWindow* window = g.CurrentWindow;
IM_ASSERT(ms->FocusScopeId == g.CurrentFocusScopeId);
IM_ASSERT(g.CurrentMultiSelect != NULL && storage->Window == g.CurrentWindow);
IM_ASSERT(g.MultiSelectTempDataStacked > 0 && &g.MultiSelectTempData[g.MultiSelectTempDataStacked - 1] == g.CurrentMultiSelect);
const ImRect scope_rect = (ms->Flags & ImGuiMultiSelectFlags_ScopeRect) ? ImRect(ms->ScopeRectMin, ImMax(window->DC.CursorMaxPos, ms->ScopeRectMin)) : window->InnerClipRect;
if (ms->IsFocused)
@ -7332,14 +7335,15 @@ ImGuiMultiSelectIO* ImGui::EndMultiSelect()
// Unwind
window->DC.CursorMaxPos = ImMax(ms->BackupCursorMaxPos, window->DC.CursorMaxPos);
ms->FocusScopeId = 0;
ms->Flags = ImGuiMultiSelectFlags_None;
PopFocusScope();
g.CurrentMultiSelect = NULL;
if (g.DebugLogFlags & ImGuiDebugLogFlags_EventSelection)
DebugLogMultiSelectRequests("EndMultiSelect", &ms->IO);
ms->FocusScopeId = 0;
ms->Flags = ImGuiMultiSelectFlags_None;
g.CurrentMultiSelect = (--g.MultiSelectTempDataStacked > 0) ? &g.MultiSelectTempData[g.MultiSelectTempDataStacked - 1] : NULL;
return &ms->IO;
}