Index: binaries/data/mods/mod/gui/gui.rnc
===================================================================
--- binaries/data/mods/mod/gui/gui.rnc
+++ binaries/data/mods/mod/gui/gui.rnc
@@ -99,6 +99,7 @@
   attribute sprite2_pressed { text }?&
   attribute sprite_selectarea { text }?&
   attribute square_side { xsd:decimal }?&
+  attribute steps { xsd:nonNegativeInteger }?&
   attribute textcolor { ccolor }?&
   attribute textcolor_disabled { ccolor }?&
   attribute textcolor_over { ccolor }?&
Index: binaries/data/mods/mod/gui/gui.rng
===================================================================
--- binaries/data/mods/mod/gui/gui.rng
+++ binaries/data/mods/mod/gui/gui.rng
@@ -380,6 +380,11 @@
         </attribute>
       </optional>
       <optional>
+        <attribute name="steps">
+          <data type="nonNegativeInteger"/>
+        </attribute>
+      </optional>
+      <optional>
         <attribute name="textcolor">
           <ref name="ccolor"/>
         </attribute>
Index: source/gui/CSlider.h
===================================================================
--- source/gui/CSlider.h
+++ source/gui/CSlider.h
@@ -46,6 +46,7 @@
 	CRect GetButtonRect();
 
 	float m_MinValue, m_MaxValue, m_Value;
+	int m_Steps, m_Step;
 
 private:
 	bool m_IsPressed;
@@ -53,6 +54,8 @@
 	CPos m_Mouse;
 
 	float m_ButtonSide;
+	float m_OldValue;
+	int m_OldStep;
 };
 
 #endif // INCLUDED_CSLIDER
Index: source/gui/CSlider.cpp
===================================================================
--- source/gui/CSlider.cpp
+++ source/gui/CSlider.cpp
@@ -23,7 +23,7 @@
 
 
 CSlider::CSlider()
-	: m_IsPressed(false), m_ButtonSide(0)
+	: m_IsPressed(false), m_ButtonSide(0.f), m_Steps(0), m_Step(0)
 {
 	AddSetting(GUIST_float, "value");
 	AddSetting(GUIST_float, "min_value");
@@ -32,12 +32,26 @@
 	AddSetting(GUIST_CGUISpriteInstance, "sprite");
 	AddSetting(GUIST_CGUISpriteInstance, "sprite_bar");
 	AddSetting(GUIST_float, "button_width");
+	AddSetting(GUIST_int, "step");
+	AddSetting(GUIST_int, "steps");
 
-	GUI<float>::GetSetting(this, "value", m_Value);
+	GUI<float>::GetSetting(this, "button_width", m_ButtonSide);
 	GUI<float>::GetSetting(this, "min_value", m_MinValue);
 	GUI<float>::GetSetting(this, "max_value", m_MaxValue);
-	GUI<float>::GetSetting(this, "button_width", m_ButtonSide);
-	m_Value = Clamp(m_Value, m_MinValue, m_MaxValue);
+	GUI<int>::GetSetting(this, "steps", m_Steps);
+	if (m_Steps < 0)
+		m_Steps = 0;
+	if (m_Steps > 0)
+	{
+		GUI<int>::GetSetting(this, "step", m_Step);
+		m_Step = Clamp(m_Step, 0, m_Steps);
+		m_Value = m_MinValue + (m_MaxValue - m_MinValue) / (m_Steps + 1) * m_Step;
+	}
+	else
+	{
+		GUI<float>::GetSetting(this, "value", m_Value);
+		m_Value = Clamp(m_Value, m_MinValue, m_MaxValue);
+	}
 }
 
 CSlider::~CSlider()
@@ -50,18 +64,33 @@
 	{
 	case GUIM_SETTINGS_UPDATED:
 	{
+		GUI<float>::GetSetting(this, "button_width", m_ButtonSide);
 		GUI<float>::GetSetting(this, "value", m_Value);
 		GUI<float>::GetSetting(this, "min_value", m_MinValue);
 		GUI<float>::GetSetting(this, "max_value", m_MaxValue);
-		GUI<float>::GetSetting(this, "button_width", m_ButtonSide);
 		m_Value = Clamp(m_Value, m_MinValue, m_MaxValue);
+		GUI<int>::GetSetting(this, "steps", m_Steps);
+		if (m_Steps < 0)
+			m_Steps = 0;
+		if (m_Steps > 0)
+		{
+			m_Step = round(m_Value * (m_Steps + 1) / (m_MaxValue - m_MinValue));
+			m_Step = Clamp(m_Step, 0, m_Steps);
+			m_Value = m_MinValue + (m_MaxValue - m_MinValue) / (m_Steps + 1) * m_Step;
+		}
 		break;
 	}
 	case GUIM_MOUSE_WHEEL_DOWN:
 	{
 		if (m_IsPressed)
 			break;
-		m_Value = std::max(m_Value - 0.01f, m_MinValue);
+		if (!m_Steps)
+			m_Value = std::max(m_Value - 0.01f, m_MinValue);
+		else
+		{
+			m_Step = std::min(m_Step + 1, m_Steps);
+			m_Value = m_MinValue + (m_MaxValue - m_MinValue) / (m_Steps + 1) * m_Step;
+		}
 		UpdateValue();
 		break;
 	}
@@ -69,7 +98,26 @@
 	{
 		if (m_IsPressed)
 			break;
-		m_Value = std::min(m_Value + 0.01f, m_MaxValue);
+		if (!m_Steps)
+			m_Value = std::min(m_Value + m_Step, m_MaxValue);
+		else
+		{
+			m_Step = std::max(m_Step - 1, 0);
+			m_Value = m_MinValue + (m_MaxValue - m_MinValue) / (m_Steps + 1) * m_Step;
+		}
+		UpdateValue();
+		break;
+	}
+	case GUIM_MOUSE_DBLCLICK_LEFT:
+	{
+		m_IsPressed = false;
+		if (!m_Steps)
+			m_Value = (m_MaxValue + m_MinValue) / 2.f;
+		else
+		{
+			m_Step = m_Steps / 2;
+			m_Value = m_MinValue + (m_MaxValue - m_MinValue) / (m_Steps + 1) * m_Step;
+		}
 		UpdateValue();
 		break;
 	}
@@ -78,6 +126,10 @@
 		if (GetButtonRect().PointInside(GetMousePos()))
 		{
 			m_Mouse = GetMousePos();
+			if (!m_Steps)
+				m_OldValue = m_Value;
+			else
+				m_OldStep = m_Step;
 			m_IsPressed = true;
 		}
 		break;
@@ -93,10 +145,18 @@
 			m_IsPressed = false;
 		if (m_IsPressed)
 		{
-			float ratio = (m_MaxValue - m_MinValue) / (m_CachedActualSize.GetWidth() - m_ButtonSide);
-			float difference = float(GetMousePos().x - m_Mouse.x) * ratio;
-			m_Mouse = GetMousePos();
-			m_Value = Clamp(m_Value + difference, m_MinValue, m_MaxValue);
+			float difference = float(GetMousePos().x - m_Mouse.x);
+			if (!m_Steps)
+			{
+				float ratio = (m_MaxValue - m_MinValue) / (m_CachedActualSize.GetWidth() - m_ButtonSide);
+				m_Value = Clamp(m_OldValue + difference * ratio, m_MinValue, m_MaxValue);
+			}
+			else
+			{
+				float step_length = (m_CachedActualSize.GetWidth() - m_ButtonSide) / (m_Steps + 1);
+				m_Step = Clamp(m_OldStep + int(std::round(difference / step_length)), 0, m_Steps);
+				m_Value = m_MinValue + (m_MaxValue - m_MinValue) / (m_Steps + 1) * m_Step;
+			}
 			UpdateValue();
 		}
 		break;
@@ -127,8 +187,9 @@
 }
 
 void CSlider::UpdateValue()
-{	
+{
 	GUI<float>::SetSetting(this, "value", m_Value);
+	GUI<int>::SetSetting(this, "step", m_Step);
 	ScriptEvent("valuechange");
 }