Method NavUpdateCancelRequest

KBotExt/imgui/imgui.cpp:11822–11864

Process NavCancel input (to close a popup, get back to parent, clear focus) FIXME: In order to support e.g. Escape to clear a selection we'll need: - either to store the equivalent of ActiveIdUsingKeyInputMask for a FocusScope and test for it. - either to move most/all of those tests to the epilogue/end functions of the scope they are dealing with (e.g. exit child window in EndChild()) or in EndFr

// - either to store the equivalent of ActiveIdUsingKeyInputMask for a FocusScope and test for it.
// - either to move most/all of those tests to the epilogue/end functions of the scope they are dealing with (e.g. exit child window in EndChild()) or in EndFrame(), to allow an earlier intercept
static void ImGui::NavUpdateCancelRequest()
{
	ImGuiContext& g = *GImGui;
	const bool nav_gamepad_active = (g.IO.ConfigFlags & ImGuiConfigFlags_NavEnableGamepad) != 0 && (g.IO.BackendFlags & ImGuiBackendFlags_HasGamepad) != 0;
	const bool nav_keyboard_active = (g.IO.ConfigFlags & ImGuiConfigFlags_NavEnableKeyboard) != 0;
	if (!(nav_keyboard_active && IsKeyPressed(ImGuiKey_Escape, ImGuiKeyOwner_None)) && !(nav_gamepad_active && IsKeyPressed(ImGuiKey_NavGamepadCancel, ImGuiKeyOwner_None)))
		return;

	IMGUI_DEBUG_LOG_NAV("[nav] NavUpdateCancelRequest()\n");
	if (g.ActiveId != 0)
	{
		ClearActiveID();
	}
	else if (g.NavLayer != ImGuiNavLayer_Main)
	{
		// Leave the "menu" layer
		NavRestoreLayer(ImGuiNavLayer_Main);
		NavRestoreHighlightAfterMove();
	}
	else if (g.NavWindow && g.NavWindow != g.NavWindow->RootWindow && !(g.NavWindow->Flags & ImGuiWindowFlags_Popup) && g.NavWindow->ParentWindow)
	{
		// Exit child window
		ImGuiWindow* child_window = g.NavWindow;
		ImGuiWindow* parent_window = g.NavWindow->ParentWindow;
		IM_ASSERT(child_window->ChildId != 0);
		ImRect child_rect = child_window->Rect();
		FocusWindow(parent_window);
		SetNavID(child_window->ChildId, ImGuiNavLayer_Main, 0, WindowRectAbsToRel(parent_window, child_rect));
		NavRestoreHighlightAfterMove();
	}
	else if (g.OpenPopupStack.Size > 0 && g.OpenPopupStack.back().Window != NULL && !(g.OpenPopupStack.back().Window->Flags & ImGuiWindowFlags_Modal))
	{
		// Close open popup/menu
		ClosePopupToLevel(g.OpenPopupStack.Size - 1, true);
	}
	else
	{
		// Clear NavLastId for popups but keep it for regular child window so we can leave one and come back where we were
		if (g.NavWindow && ((g.NavWindow->Flags & ImGuiWindowFlags_Popup) || !(g.NavWindow->Flags & ImGuiWindowFlags_ChildWindow)))
			g.NavWindow->NavLastIds[0] = 0;
		g.NavId = 0;
	}
}

// Handle PageUp/PageDown/Home/End keys
// Called from NavUpdateCreateMoveRequest() which will use our output to create a move request