Method AcceptDragDropPayload

KBotExt/imgui/imgui.cpp:12554–12590

}

const ImGuiPayload* ImGui::AcceptDragDropPayload(const char* type, ImGuiDragDropFlags flags)
{
	ImGuiContext& g = *GImGui;
	ImGuiWindow* window = g.CurrentWindow;
	ImGuiPayload& payload = g.DragDropPayload;
	IM_ASSERT(g.DragDropActive);                        // Not called between BeginDragDropTarget() and EndDragDropTarget() ?
	IM_ASSERT(payload.DataFrameCount != -1);            // Forgot to call EndDragDropTarget() ?
	if (type != NULL && !payload.IsDataType(type))
		return NULL;

	// Accept smallest drag target bounding box, this allows us to nest drag targets conveniently without ordering constraints.
	// NB: We currently accept NULL id as target. However, overlapping targets requires a unique ID to function!
	const bool was_accepted_previously = (g.DragDropAcceptIdPrev == g.DragDropTargetId);
	ImRect r = g.DragDropTargetRect;
	float r_surface = r.GetWidth() * r.GetHeight();
	if (r_surface > g.DragDropAcceptIdCurrRectSurface)
		return NULL;

	g.DragDropAcceptFlags = flags;
	g.DragDropAcceptIdCurr = g.DragDropTargetId;
	g.DragDropAcceptIdCurrRectSurface = r_surface;
	//IMGUI_DEBUG_LOG("AcceptDragDropPayload(): %08X: accept\n", g.DragDropTargetId);

	// Render default drop visuals
	payload.Preview = was_accepted_previously;
	flags |= (g.DragDropSourceFlags & ImGuiDragDropFlags_AcceptNoDrawDefaultRect); // Source can also inhibit the preview (useful for external sources that live for 1 frame)
	if (!(flags & ImGuiDragDropFlags_AcceptNoDrawDefaultRect) && payload.Preview)
		window->DrawList->AddRect(r.Min - ImVec2(3.5f, 3.5f), r.Max + ImVec2(3.5f, 3.5f), GetColorU32(ImGuiCol_DragDropTarget), 0.0f, 0, 2.0f);

	g.DragDropAcceptFrameCount = g.FrameCount;
	payload.Delivery = was_accepted_previously && !IsMouseDown(g.DragDropMouseButton); // For extern drag sources affecting OS window focus, it's easier to just test !IsMouseDown() instead of IsMouseReleased()
	if (!payload.Delivery && !(flags & ImGuiDragDropFlags_AcceptBeforeDelivery))
		return NULL;

	//IMGUI_DEBUG_LOG("AcceptDragDropPayload(): %08X: return payload\n", g.DragDropTargetId);
	return &payload;
}

// FIXME-DRAGDROP: Settle on a proper default visuals for drop target.
void ImGui::RenderDragDropTargetRect(const ImRect& bb)