Add toggle sneak option; fix bug #2119

To enable toggle sneak mode, set "toggle sneak = true" in
the [Input] section of settings.cfg.

Outstanding issues:
    - In toggle sneak mode, holding the Sneak button causes
      rapid, repeated toggling.
    - The button in the settings menu doesn't do anything.

apps/openmw/mwinput/inputmanagerimp.cpp

@@ -124,6 +124,8 @@ namespace MWInput
         , mTimeIdle(0.f)
         , mOverencumberedMessageDelay(0.f)
         , mAlwaysRunActive(Settings::Manager::getBool("always run", "Input"))
+        , mSneakToggles(Settings::Manager::getBool("toggle sneak", "Input"))
+        , mSneaking(false)
         , mAttemptJump(false)
         , mControlsDisabled(false)
         , mJoystickLastUsed(false)
@@ -522,6 +524,15 @@ namespace MWInput
                     }
                 }
 
+                if (mSneakToggles)
+                {
+                    if (actionIsActive(A_Sneak))
+                    {
+                        toggleSneaking();
+                        mPlayer->setSneak(mSneaking);
+                    }
+                }
+                else 
                     mPlayer->setSneak(actionIsActive(A_Sneak));
 
                 if (mAttemptJump && mControlSwitch["playerjumping"])
@@ -1089,6 +1100,12 @@ namespace MWInput
         Settings::Manager::setBool("always run", "Input", mAlwaysRunActive);
     }
 
+    void InputManager::toggleSneaking()
+    {
+        if (MWBase::Environment::get().getWindowManager()->isGuiMode()) return;
+        mSneaking = !mSneaking;
+    }
+
     void InputManager::resetIdleTime()
     {
         if (mTimeIdle < 0)

apps/openmw/mwinput/inputmanagerimp.hpp

@@ -180,6 +180,8 @@ namespace MWInput
         int mMouseWheel;
         bool mUserFileExists;
         bool mAlwaysRunActive;
+        bool mSneakToggles;
+        bool mSneaking;
         bool mAttemptJump;
 
         std::map<std::string, bool> mControlSwitch;
@@ -208,6 +210,7 @@ namespace MWInput
         void toggleJournal();
         void activate();
         void toggleWalking();
+        void toggleSneaking();
         void toggleAutoMove();
         void rest();
         void quickLoad();

files/mygui/openmw_settings_window.layout

@@ -196,10 +196,20 @@
                         <Property key="Caption" value="#{sMouseFlip}"/>
                     </Widget>
                 </Widget>
-                <Widget type="TextBox" skin="NormalText" position="4 254 336 18" align="Left Bottom">
+                <Widget type="HBox" skin="" position="4 254 300 24" align="Left Bottom">
+                    <Widget type="AutoSizedButton" skin="MW_Button" position="0 0 24 24" align="Left Bottom" name="ToggleSneak">
+                        <UserString key="SettingCategory" value="Input"/>
+                        <UserString key="SettingName" value="toggle sneak"/>
+                        <UserString key="SettingType" value="CheckButton"/>
+                    </Widget>
+                    <Widget type="AutoSizedTextBox" skin="SandText" position="28 4 78 16" align="Left Bottom">
+                        <Property key="Caption" value="Toggle Sneak"/>
+                    </Widget>
+                </Widget>
+                <Widget type="TextBox" skin="NormalText" position="4 278 336 18" align="Left Bottom">
                     <Property key="Caption" value="Camera sensitivity"/>
                 </Widget>
-                <Widget type="MWScrollBar" skin="MW_HScroll" position="4 278 336 18" align="HStretch Bottom" name="CameraSensitivitySlider">
+                <Widget type="MWScrollBar" skin="MW_HScroll" position="4 302 336 18" align="HStretch Bottom" name="CameraSensitivitySlider">
                     <Property key="Range" value="10000"/>
                     <Property key="Page" value="300"/>
                     <UserString key="SettingType" value="Slider"/>
@@ -209,11 +219,11 @@
                     <UserString key="SettingMin" value="0.2"/>
                     <UserString key="SettingMax" value="5.0"/>
                 </Widget>
-                <Widget type="TextBox" skin="SandText" position="4 302 336 18" align="Left Bottom">
+                <Widget type="TextBox" skin="SandText" position="4 326 336 18" align="Left Bottom">
                     <Property key="Caption" value="#{sLow}"/>
                     <Property key="TextAlign" value="Left"/>
                 </Widget>
-                <Widget type="TextBox" skin="SandText" position="4 302 336 18" align="Right Bottom">
+                <Widget type="TextBox" skin="SandText" position="4 326 336 18" align="Right Bottom">
                     <Property key="Caption" value="#{sHigh}"/>
                     <Property key="TextAlign" value="Right"/>
                 </Widget>

files/settings-default.cfg

@@ -194,6 +194,8 @@ always run = false
 
 allow third person zoom = false
 
+toggle sneak = false
+
 [Game]
 # Always use the most powerful attack when striking with a weapon (chop, slash or thrust)
 best attack = false