Method IsItemHovered

KBotExt/imgui/imgui.cpp:3985–4071

This is roughly matching the behavior of internal-facing ItemHoverable() - we allow hovering to be true when ActiveId==window->MoveID, so that clicking on non-interactive items such as a Text() item still returns true with IsItemHovered() - this should work even for non-interactive items that have no ID, so we cannot use LastItemId

// - we allow hovering to be true when ActiveId==window->MoveID, so that clicking on non-interactive items such as a Text() item still returns true with IsItemHovered()
// - this should work even for non-interactive items that have no ID, so we cannot use LastItemId
bool ImGui::IsItemHovered(ImGuiHoveredFlags flags)
{
	ImGuiContext& g = *GImGui;
	ImGuiWindow* window = g.CurrentWindow;
	IM_ASSERT((flags & ~ImGuiHoveredFlags_AllowedMaskForIsItemHovered) == 0 && "Invalid flags for IsItemHovered()!");

	if (g.NavDisableMouseHover && !g.NavDisableHighlight && !(flags & ImGuiHoveredFlags_NoNavOverride))
	{
		if ((g.LastItemData.InFlags & ImGuiItemFlags_Disabled) && !(flags & ImGuiHoveredFlags_AllowWhenDisabled))
			return false;
		if (!IsItemFocused())
			return false;

		if (flags & ImGuiHoveredFlags_ForTooltip)
			flags |= g.Style.HoverFlagsForTooltipNav;
	}
	else
	{
		// Test for bounding box overlap, as updated as ItemAdd()
		ImGuiItemStatusFlags status_flags = g.LastItemData.StatusFlags;
		if (!(status_flags & ImGuiItemStatusFlags_HoveredRect))
			return false;

		if (flags & ImGuiHoveredFlags_ForTooltip)
			flags |= g.Style.HoverFlagsForTooltipMouse;

		IM_ASSERT((flags & (ImGuiHoveredFlags_AnyWindow | ImGuiHoveredFlags_RootWindow | ImGuiHoveredFlags_ChildWindows | ImGuiHoveredFlags_NoPopupHierarchy)) == 0);   // Flags not supported by this function

		// Done with rectangle culling so we can perform heavier checks now
		// Test if we are hovering the right window (our window could be behind another window)
		// [2021/03/02] Reworked / reverted the revert, finally. Note we want e.g. BeginGroup/ItemAdd/EndGroup to work as well. (#3851)
		// [2017/10/16] Reverted commit 344d48be3 and testing RootWindow instead. I believe it is correct to NOT test for RootWindow but this leaves us unable
		// to use IsItemHovered() after EndChild() itself. Until a solution is found I believe reverting to the test from 2017/09/27 is safe since this was
		// the test that has been running for a long while.
		if (g.HoveredWindow != window && (status_flags & ImGuiItemStatusFlags_HoveredWindow) == 0)
			if ((flags & ImGuiHoveredFlags_AllowWhenOverlappedByWindow) == 0)
				return false;

		// Test if another item is active (e.g. being dragged)
		const ImGuiID id = g.LastItemData.ID;
		if ((flags & ImGuiHoveredFlags_AllowWhenBlockedByActiveItem) == 0)
			if (g.ActiveId != 0 && g.ActiveId != id && !g.ActiveIdAllowOverlap && g.ActiveId != window->MoveId)
				return false;

		// Test if interactions on this window are blocked by an active popup or modal.
		// The ImGuiHoveredFlags_AllowWhenBlockedByPopup flag will be tested here.
		if (!IsWindowContentHoverable(window, flags) && !(g.LastItemData.InFlags & ImGuiItemFlags_NoWindowHoverableCheck))
			return false;

		// Test if the item is disabled
		if ((g.LastItemData.InFlags & ImGuiItemFlags_Disabled) && !(flags & ImGuiHoveredFlags_AllowWhenDisabled))
			return false;

		// Special handling for calling after Begin() which represent the title bar or tab.
		// When the window is skipped/collapsed (SkipItems==true) that last item will never be overwritten so we need to detect the case.
		if (id == window->MoveId && window->WriteAccessed)
			return false;