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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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3
imgui.cpp
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@ -3819,6 +3819,7 @@ void ImGui::Shutdown()
g.DrawChannelsTempMergeBuffer.clear();
g.MultiSelectStorage.Clear();
g.MultiSelectTempData.clear_destruct();
g.ClipboardHandlerData.clear();
g.MenusIdSubmittedThisFrame.clear();
@ -3930,6 +3931,8 @@ void ImGui::GcCompactTransientMiscBuffers()
ImGuiContext& g = *GImGui;
g.ItemFlagsStack.clear();
g.GroupStack.clear();
g.MultiSelectTempDataStacked = 0;
g.MultiSelectTempData.clear_destruct();
TableGcCompactSettings();
}

3
imgui.h
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@ -2811,6 +2811,9 @@ struct ImGuiSelectionRequest
ImGuiSelectionRequest(ImGuiSelectionRequestType type = ImGuiSelectionRequestType_None) { Type = type; RangeSelected = false; RangeFirstItem = RangeLastItem = (ImGuiSelectionUserData)-1; }
};
// Main IO structure returned by BeginMultiSelect()/EndMultiSelect().
// Read the large comments block above for details.
// Lifetime: don't hold on ImGuiMultiSelectIO* pointers over multiple frames or past any subsequent call to BeginMultiSelect() or EndMultiSelect().
struct ImGuiMultiSelectIO
{
ImVector<ImGuiSelectionRequest> Requests; // ms:w, app:r / ms:w app:r // Requests

6
imgui_internal.h
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@ -2200,8 +2200,9 @@ struct ImGuiContext
ImVector<ImGuiShrinkWidthItem> ShrinkWidthBuffer;
// Multi-Select state
ImGuiMultiSelectTempData* CurrentMultiSelect; // FIXME-MULTISELECT: We currently don't support recursing/stacking multi-select
ImGuiMultiSelectTempData MultiSelectTempData[1];
ImGuiMultiSelectTempData* CurrentMultiSelect;
int MultiSelectTempDataStacked; // Temporary multi-select data size (because we leave previous instances undestructed, we generally don't use MultiSelectTempData.Size)
ImVector<ImGuiMultiSelectTempData> MultiSelectTempData;
ImPool<ImGuiMultiSelectState> MultiSelectStorage;
// Hover Delay system
@ -2445,6 +2446,7 @@ struct ImGuiContext
TablesTempDataStacked = 0;
CurrentTabBar = NULL;
CurrentMultiSelect = NULL;
MultiSelectTempDataStacked = 0;
HoverItemDelayId = HoverItemDelayIdPreviousFrame = HoverItemUnlockedStationaryId = HoverWindowUnlockedStationaryId = 0;
HoverItemDelayTimer = HoverItemDelayClearTimer = 0.0f;

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;
}