diff --git a/README-ru.md b/README-ru.md
index 7da4b2e..cb63587 100644
--- a/README-ru.md
+++ b/README-ru.md
@@ -3178,13 +3178,21 @@ NumberPicker может работать в двух режимах: редак
 Для отслеживания изменения вводимого значения используется событие "number-changed" (константа
 NumberChangedEvent).  Основной слушатель события имеет следующий формат:
 
-	func(picker NumberPicker, newValue float64)
+	func(picker NumberPicker, newValue, oldValue float64)
 
-где второй аргумент это новое значение
+где второй аргумент это новое значение, третий аргумент - предыдущее значение.
+
+Дополнительные слушатели события могут иметь следующий формат
+
+	func(picker NumberPicker, newValue string)
+	func(newValue, oldValue string)
+	func(newValue string)
+	func(picker NumberPicker)
+	func()
 
 Получить текущий список слушателей изменения значения можно с помощью функции
 
-	func GetNumberChangedListeners(view View, subviewID ...string) []func(NumberPicker, float64)
+	func GetNumberChangedListeners(view View, subviewID ...string) []func(NumberPicker, float64, float64)
 
 ## DatePicker
 
diff --git a/README.md b/README.md
index 6a463ff..ef7a792 100644
--- a/README.md
+++ b/README.md
@@ -767,9 +767,9 @@ Example
 equivalent to
 
 	view.Set(rui.Border, NewBorder(rui.Params{
-		rui.Style: rui.SolidBorder,
-		rui.Width: rui.Px(1),
-		rui.ColorProperty: rui.Black,
+		rui.Style   : rui.SolidBorder,
+		rui.Width   : rui.Px(1),
+		rui.ColorTag: rui.Black,
 	}))
 
 The BorderProperty interface can be converted to a ViewBorders structure using the Border function.
@@ -831,9 +831,9 @@ Example
 equivalent to
 
 	view.Set(rui.Border, NewBorder(rui.Params{
-		rui.Style: rui.SolidBorder,
-		rui.Width: rui.Px(1),
-		rui.ColorProperty: rui.Black,
+		rui.Style   : rui.SolidBorder,
+		rui.Width   : rui.Px(1),
+		rui.ColorTag: rui.Black,
 	}))
 
 ### "outline" and "outline-offset" properties
@@ -1012,7 +1012,7 @@ The shadow has the following properties:
 
 | Property        | Constant      | Type     | Description                                                           |
 |-----------------|---------------|----------|-----------------------------------------------------------------------|
-| "color"         | ColorProperty | Color    | Shadow color                                                          |
+| "color"         | ColorTag      | Color    | Shadow color                                                          |
 | "inset"         | Inset         | bool     | true - the shadow inside the View, false - outside                    |
 | "x-offset"      | XOffset       | SizeUnit | Offset the shadow along the X axis                                    |
 | "y-offset"      | YOffset       | SizeUnit | Offset the shadow along the Y axis                                    |
@@ -1031,9 +1031,9 @@ The NewShadowWithParams function is used when constants must be used as paramete
 For example:
 
 	shadow := NewShadowWithParams(rui.Params{
-		rui.ColorProperty : "@shadowColor",
-		rui.BlurRadius : 8.0,
-		rui.Dilation : 16.0,
+		rui.ColorTag  : "@shadowColor",
+		rui.BlurRadius: 8.0,
+		rui.Dilation  : 16.0,
 	})
 
 ViewShadow, ViewShadow array, and ViewShadow textual representation can be assigned as a value to the "shadow" property.
@@ -1652,8 +1652,8 @@ To create a ViewShadow for the text shadow, the following functions are used:
 The NewShadowWithParams function is used when constants must be used as parameters. For example:
 
 	shadow := NewShadowWithParams(rui.Params{
-		rui.ColorProperty : "@shadowColor",
-		rui.BlurRadius    : 8.0,
+		rui.ColorTag  : "@shadowColor",
+		rui.BlurRadius: 8.0,
 	})
 
 ViewShadow, ViewShadow array, ViewShadow textual representation can be assigned as a value to the "text-shadow" property (see above, section "The 'shadow' property").
@@ -2529,11 +2529,11 @@ The separator line is described by three attributes: line style, thickness, and
 The value of the "column-separator" property is stored as the ColumnSeparatorProperty interface, 
 which implements the Properties interface (see above). ColumnSeparatorProperty can contain the following properties:
 
-| Property | Constant      | Type     | Description    |
-|----------|---------------|----------|----------------|
-| "style"  | Style         | int      | Line style     |
-| "width"  | Width         | SizeUnit | Line thickness |
-| "color"  | ColorProperty | Color    | Line color     |
+| Property | Constant  | Type     | Description    |
+|----------|-----------|----------|----------------|
+| "style"  | Style     | int      | Line style     |
+| "width"  | Width     | SizeUnit | Line thickness |
+| "color"  | ColorTag  | Color    | Line color     |
 
 Line style can take the following values:
 
@@ -2587,9 +2587,9 @@ For example
 equivalent to
 
 	view.Set(rui.ColumnSeparator, ColumnSeparatorProperty(rui.Params{
-		rui.Style: rui.SolidBorder,
-		rui.Width: rui.Px(1),
-		rui.ColorProperty: rui.Black,
+		rui.Style   : rui.SolidBorder,
+		rui.Width   : rui.Px(1),
+		rui.ColorTag: rui.Black,
 	}))
 
 ### "column-fill" property
@@ -3141,13 +3141,21 @@ You can read the values of these properties using the functions:
 The "number-changed" event (NumberChangedEvent constant) is used to track the change in the entered value. 
 The main event listener has the following format:
 
-	func(picker NumberPicker, newValue float64)
+	func(picker NumberPicker, newValue, oldValue float64)
 
-where the second argument is the new value
+where the second argument is the new value, the third argument is the previous value.
+
+Additional event listeners can have the following format
+
+	func(picker NumberPicker, newValue string)
+	func(newValue, oldValue string)
+	func(newValue string)
+	func(picker NumberPicker)
+	func()
 
 You can get the current list of value change listeners using the function
 
-	func GetNumberChangedListeners(view View, subviewID ...string) []func(NumberPicker, float64)
+	func GetNumberChangedListeners(view View, subviewID ...string) []func(NumberPicker, float64, float64)
 
 ## DatePicker
 
diff --git a/numberPicker.go b/numberPicker.go
index 551fe7c..d7b3745 100644
--- a/numberPicker.go
+++ b/numberPicker.go
@@ -29,7 +29,7 @@ type NumberPicker interface {
 
 type numberPickerData struct {
 	viewData
-	numberChangedListeners []func(NumberPicker, float64)
+	numberChangedListeners []func(NumberPicker, float64, float64)
 }
 
 // NewNumberPicker create new NumberPicker object and return it
@@ -47,7 +47,7 @@ func newNumberPicker(session Session) View {
 func (picker *numberPickerData) init(session Session) {
 	picker.viewData.init(session)
 	picker.tag = "NumberPicker"
-	picker.numberChangedListeners = []func(NumberPicker, float64){}
+	picker.numberChangedListeners = []func(NumberPicker, float64, float64){}
 }
 
 func (picker *numberPickerData) String() string {
@@ -76,7 +76,20 @@ func (picker *numberPickerData) remove(tag string) {
 	switch tag {
 	case NumberChangedEvent:
 		if len(picker.numberChangedListeners) > 0 {
-			picker.numberChangedListeners = []func(NumberPicker, float64){}
+			picker.numberChangedListeners = []func(NumberPicker, float64, float64){}
+			picker.propertyChangedEvent(tag)
+		}
+
+	case NumberPickerValue:
+		oldValue := GetNumberPickerValue(picker)
+		picker.viewData.remove(tag)
+		if oldValue != 0 {
+			if picker.created {
+				picker.session.callFunc("setInputValue", picker.htmlID(), 0)
+			}
+			for _, listener := range picker.numberChangedListeners {
+				listener(picker, 0, oldValue)
+			}
 			picker.propertyChangedEvent(tag)
 		}
 
@@ -98,12 +111,12 @@ func (picker *numberPickerData) set(tag string, value any) bool {
 
 	switch tag {
 	case NumberChangedEvent:
-		listeners, ok := valueToEventListeners[NumberPicker, float64](value)
+		listeners, ok := valueToEventWithOldListeners[NumberPicker, float64](value)
 		if !ok {
 			notCompatibleType(tag, value)
 			return false
 		} else if listeners == nil {
-			listeners = []func(NumberPicker, float64){}
+			listeners = []func(NumberPicker, float64, float64){}
 		}
 		picker.numberChangedListeners = listeners
 		picker.propertyChangedEvent(tag)
@@ -119,7 +132,7 @@ func (picker *numberPickerData) set(tag string, value any) bool {
 					picker.session.callFunc("setInputValue", picker.htmlID(), newValue)
 				}
 				for _, listener := range picker.numberChangedListeners {
-					listener(picker, f)
+					listener(picker, f, oldValue)
 				}
 				picker.propertyChangedEvent(tag)
 			}
@@ -159,13 +172,6 @@ func (picker *numberPickerData) propertyChanged(tag string) {
 			} else {
 				picker.session.updateProperty(picker.htmlID(), Step, "any")
 			}
-
-		case NumberPickerValue:
-			value := GetNumberPickerValue(picker)
-			picker.session.callFunc("setInputValue", picker.htmlID(), value)
-			for _, listener := range picker.numberChangedListeners {
-				listener(picker, value)
-			}
 		}
 	}
 }
@@ -242,7 +248,7 @@ func (picker *numberPickerData) handleCommand(self View, command string, data Da
 				picker.properties[NumberPickerValue] = text
 				if value != oldValue {
 					for _, listener := range picker.numberChangedListeners {
-						listener(picker, value)
+						listener(picker, value, oldValue)
 					}
 				}
 			}
@@ -323,6 +329,6 @@ func GetNumberPickerValue(view View, subviewID ...string) float64 {
 // GetNumberChangedListeners returns the NumberChangedListener list of an NumberPicker subview.
 // If there are no listeners then the empty list is returned
 // If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
-func GetNumberChangedListeners(view View, subviewID ...string) []func(NumberPicker, float64) {
-	return getEventListeners[NumberPicker, float64](view, subviewID, NumberChangedEvent)
+func GetNumberChangedListeners(view View, subviewID ...string) []func(NumberPicker, float64, float64) {
+	return getEventWithOldListeners[NumberPicker, float64](view, subviewID, NumberChangedEvent)
 }