From bfb9943b347d7065b3b57e88021a73f64e18ab13 Mon Sep 17 00:00:00 2001
From: suyu <1643689728@qq.com>
Date: Fri, 21 Aug 2026 10:56:13 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20=E9=99=90=E5=88=B6HMI=E6=8E=A7=E4=BB=B6?=
 =?UTF-8?q?=E5=B1=9E=E6=80=A7=E6=96=87=E6=9C=AC=E9=95=BF=E5=BA=A6?=
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---
 app/src/domain/project_limits.h          | 1 +
 app/src/ui/property_panel_controller.cpp | 7 +++----
 app/tests/main_window_tests.cpp          | 4 ++++
 3 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/app/src/domain/project_limits.h b/app/src/domain/project_limits.h
index 2a9885b..b9f4d15 100644
--- a/app/src/domain/project_limits.h
+++ b/app/src/domain/project_limits.h
@@ -25,6 +25,7 @@ static_assert(kMaximumLadderColumns == kMaximumConditionColumns + 1);
 constexpr std::size_t kMaximumHmiProperties = 64U;
 constexpr std::size_t kMaximumIdBytes = 128U;
 constexpr std::size_t kMaximumTextBytes = 4096U;
+constexpr std::size_t kMaximumHmiControlTextCharacters = 12U;
 constexpr std::size_t kMaximumAlarmTitleCharacters = 12U;
 constexpr std::size_t kMaximumAlarmMessageCharacters = 20U;
 constexpr std::size_t kMaximumPropertyKeyBytes = 128U;
diff --git a/app/src/ui/property_panel_controller.cpp b/app/src/ui/property_panel_controller.cpp
index 8081622..18f005b 100644
--- a/app/src/ui/property_panel_controller.cpp
+++ b/app/src/ui/property_panel_controller.cpp
@@ -195,7 +195,8 @@ void PropertyPanelController::showControlProperties(const std::string &control_i
 
     if (!has_control)
     {
-        ui_.controlTextEdit->setMaxLength(32767);
+        ui_.controlTextEdit->setMaxLength(
+            static_cast<int>(ProjectLimits::kMaximumHmiControlTextCharacters));
         ui_.bindingAreaLabel->setVisible(false);
         ui_.bindingAreaComboBox->setVisible(false);
         ui_.bindingIndexLabel->setVisible(false);
@@ -223,9 +224,7 @@ void PropertyPanelController::showControlProperties(const std::string &control_i
     }
 
     ui_.controlTextEdit->setMaxLength(
-        control->type == HmiControlType::AlarmList
-            ? static_cast<int>(ProjectLimits::kMaximumAlarmTitleCharacters)
-            : 32767);
+        static_cast<int>(ProjectLimits::kMaximumHmiControlTextCharacters));
     ui_.controlIdEdit->setText(fromUtf8(control->id));
     ui_.controlTextEdit->setText(fromUtf8(control->text));
     ui_.controlXSpinBox->setValue(control->bounds.x);
diff --git a/app/tests/main_window_tests.cpp b/app/tests/main_window_tests.cpp
index 3f9e85d..f921e5a 100644
--- a/app/tests/main_window_tests.cpp
+++ b/app/tests/main_window_tests.cpp
@@ -1163,6 +1163,10 @@ void testModeActionsControlEditingAvailability()
             "an unbound added control must be marked in the property panel");
     require(text_edit->text() == QStringLiteral("按钮"),
             "property panel must show the control text");
+    require(text_edit->maxLength()
+                == static_cast<int>(
+                    ProjectLimits::kMaximumHmiControlTextCharacters),
+            "all HMI control text inputs must be limited to twelve characters");
     require(button_operation->currentText() == QStringLiteral("瞬时 ON"),
             "new HMI buttons must default to momentary ON");