UnityEngine.SliderHandler.OnMouseDown C# (CSharp) Method

        private float OnMouseDown()
        {
            if (!this.position.Contains(this.CurrentEvent().mousePosition) || this.IsEmptySlider())
            {
                return this.currentValue;
            }
            GUI.scrollTroughSide = 0;
            GUIUtility.hotControl = this.id;
            this.CurrentEvent().Use();
            if (this.ThumbSelectionRect().Contains(this.CurrentEvent().mousePosition))
            {
                this.StartDraggingWithValue(this.ClampedCurrentValue());
                return this.currentValue;
            }
            GUI.changed = true;
            if (this.SupportsPageMovements())
            {
                this.SliderState().isDragging = false;
                GUI.nextScrollStepTime = SystemClock.now.AddMilliseconds(250.0);
                GUI.scrollTroughSide = this.CurrentScrollTroughSide();
                return this.PageMovementValue();
            }
            float dragStartValue = this.ValueForCurrentMousePosition();
            this.StartDraggingWithValue(dragStartValue);
            return this.Clamp(dragStartValue);
        }