feat(focus): 完成阶段 2 通用焦点系统

tests/UiFixture.cpp

@@ -251,6 +251,65 @@ int main(int argc, char** argv)
 		});
 		window.addControl(std::move(resize));
 	}
+	else if (scenario == "focus")
+	{
+		// Stage 2 integration: real focus visuals, Table child eligibility, and active Tab page filtering.
+		auto button = MakeButton(20, 20, 120, 40, "focus button");
+		Button* buttonRaw = button.get();
+		bool buttonFocusObserved = false;
+		button->setOnClickListener([&]() { buttonFocusObserved = buttonRaw->hasLogicalFocus(); });
+		window.addControl(std::move(button));
+
+		auto textBox = std::make_unique<TextBox>(20, 80, 160, 36, "focus text");
+		TextBox* textBoxRaw = textBox.get();
+		window.addControl(std::move(textBox));
+
+		auto table = std::make_unique<Table>(210, 20);
+		const auto tableHandle = table->getHandle();
+		table->setHeaders({ "value" });
+		table->setRowsPerPage(1);
+		table->setData({ { "one" }, { "two" } });
+		window.addControl(std::move(table));
+
+		auto tabs = std::make_unique<TabControl>(20, 145, 300, 140);
+		tabs->setActiveIndex(0);
+		auto firstPage = std::make_unique<Canvas>(0, 0, 300, 110);
+		auto firstPageButton = MakeButton(10, 40, 110, 30, "active child");
+		const auto firstPageChildHandle = firstPageButton->getHandle();
+		firstPage->addControl(std::move(firstPageButton));
+		tabs->addTab(MakeButton(0, 0, 100, 30, "first"), std::move(firstPage));
+
+		auto secondPage = std::make_unique<Canvas>(0, 0, 300, 110);
+		auto secondPageButton = MakeButton(10, 40, 110, 30, "inactive child");
+		const auto secondPageChildHandle = secondPageButton->getHandle();
+		secondPage->addControl(std::move(secondPageButton));
+		tabs->addTab(MakeButton(100, 0, 100, 30, "second"), std::move(secondPage));
+		window.addControl(std::move(tabs));
+
+		auto verify = MakeButton(350, 260, 110, 36, "verify");
+		verify->setOnClickListener([&, buttonRaw]() {
+			const auto stops = window.getFocusManager().collectTabStops();
+			std::size_t tableTabStops = 0;
+			bool activePageChildPresent = false;
+			bool inactivePageChildPresent = false;
+			bool allSubNodesZero = true;
+			for (const auto& stop : stops)
+			{
+				if (stop.logicalParent.owner == tableHandle) ++tableTabStops;
+				if (stop.id.owner == firstPageChildHandle) activePageChildPresent = true;
+				if (stop.id.owner == secondPageChildHandle) inactivePageChildPresent = true;
+				if (stop.id.subNode != 0) allSubNodesZero = false;
+			}
+			WriteResult(resultDir, scenario,
+				std::string("{\"buttonFocusObserved\":") + (buttonFocusObserved ? "true" : "false") +
+				",\"tableTabStops\":" + std::to_string(tableTabStops) +
+				",\"activePageChildPresent\":" + (activePageChildPresent ? "true" : "false") +
+				",\"inactivePageChildPresent\":" + (inactivePageChildPresent ? "true" : "false") +
+				",\"allSubNodesZero\":" + (allSubNodesZero ? "true" : "false") + "}");
+		});
+		window.addControl(std::move(verify));
+		textBoxRaw->requestFocus();
+	}
 	else if (scenario == "dialog")
 	{
 		// 先叠加两个非模态对话框，再只关闭上层，验证下层恢复和交互顺序。