将最大最大值添加到自定义控制范围栏[关闭](Adding min max to custom contol range bar [closed])

 我在c＃中编写了一个自定义范围滑块。 到目前为止，我有3个属性'Min，Max和Value'。 根据建议，我需要执行以下操作：1。调整Value属性以检查它是否保持在Min和Max之间。 2.更改百分比变量的名称，因为它不再存储百分比。 3.使用任何浮点数或整数值作为值，不要混合它们因为你可能会失去精度。 4.创建一个方法来通过鼠标更新值并从事件处理程序中调用它。 
 
 我不确定实施这些更改的最佳方法。 我希望得到一些帮助。 
 
namespace jmRangeSlider
{
    public partial class rangeSlider : UserControl
    {
        public rangeSlider()
        {
            InitializeComponent();
            label1.ForeColor = Color.Black;
            this.ForeColor = SystemColors.Highlight; // set the default color the RangeSlider
        }

        protected float percent = 0.0f; // Protected because we don't want this to be accessed from the outside

        // Create a Value property for the RangeSlider
        public float Value
        {
            get
            {
                return percent;
            }
            set
            {
                // Maintain the value between 0 and 100
                if (value < 0) value = 0;
                else if (value > 100) value = 100;
                percent = value;
                label1.Text = value.ToString();
                //redraw the RangeSlider every time the value changes
                this.Invalidate();
            }
        }

        int minValue = 0;
        public int MinValue
        {
            get
            {
                return this.minValue;
            }

            set
            {
                this.minValue = value;
            }
        }

        int maxValue = 100;
        public int MaxValue
        {
            get
            {
                return this.maxValue;
            }

            set
            {
                this.maxValue = value;
            }
        }

        protected override void OnPaint(PaintEventArgs e)
        {
            base.OnPaint(e);
            Brush b = new SolidBrush(this.ForeColor); //create brush that will draw the background of the range bar
            // create a linear gradient that will be drawn over the background. FromArgb means you can use the Alpha value which is the transparency
            LinearGradientBrush lb = new LinearGradientBrush(new Rectangle(0, 0, this.Width, this.Height), Color.FromArgb(50, Color.White), Color.FromArgb(0, Color.White), LinearGradientMode.Vertical);

            // calculate how much has the RangeSlider to be filled for 'x' %
            int width = (int)((percent / 100) * this.Width);
            e.Graphics.FillRectangle(b, 0, 0, width, this.Height);
            e.Graphics.FillRectangle(lb, 0, 0, width, this.Height);
            b.Dispose(); lb.Dispose();
        }

        private void rangeSlider_SizeChanged(object sender, EventArgs e)
        {
            // maintain the label in the center of the RangeSlider
            label1.Location = new Point(this.Width / 2 - 21 / 2 - 4, this.Height / 2 - 15 / 2);
        }

        protected override void OnMouseClick(MouseEventArgs e)
        {
            int x = e.X;
            int y = e.Y;

            int val = (x * 100) / this.Width; //when click get value within progress bar
            int screenX = Cursor.Position.X;

            label1.Text = screenX.ToString();
            this.Value = val;
        }

        protected override void OnMouseMove(MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                //this.Value += 1;
                int x = e.X;
                int val = (x * 100) / this.Width; //when click get value within progress bar
                label1.Text = val.ToString();
                this.Value = val;
            }
        }

    }
}

I've written a custom range slider in c#. So far I have 3 properties 'Min, Max, and Value'. As suggested I need to do the following: 1. Adjust the Value property to check it stays between Min and Max. 2.Change the name of the percent variable since it no longer stores the percentage. 3.Use either floats or ints everywhere for the value, don't mix them because you could lose precision. 4.Create a method to update the value by mouse and call that from the event handlers.
 
I am not sure the best way to implement these changes. I was hoping for some help.
 
namespace jmRangeSlider
{
    public partial class rangeSlider : UserControl
    {
        public rangeSlider()
        {
            InitializeComponent();
            label1.ForeColor = Color.Black;
            this.ForeColor = SystemColors.Highlight; // set the default color the RangeSlider
        }

        protected float percent = 0.0f; // Protected because we don't want this to be accessed from the outside

        // Create a Value property for the RangeSlider
        public float Value
        {
            get
            {
                return percent;
            }
            set
            {
                // Maintain the value between 0 and 100
                if (value < 0) value = 0;
                else if (value > 100) value = 100;
                percent = value;
                label1.Text = value.ToString();
                //redraw the RangeSlider every time the value changes
                this.Invalidate();
            }
        }

        int minValue = 0;
        public int MinValue
        {
            get
            {
                return this.minValue;
            }

            set
            {
                this.minValue = value;
            }
        }

        int maxValue = 100;
        public int MaxValue
        {
            get
            {
                return this.maxValue;
            }

            set
            {
                this.maxValue = value;
            }
        }

        protected override void OnPaint(PaintEventArgs e)
        {
            base.OnPaint(e);
            Brush b = new SolidBrush(this.ForeColor); //create brush that will draw the background of the range bar
            // create a linear gradient that will be drawn over the background. FromArgb means you can use the Alpha value which is the transparency
            LinearGradientBrush lb = new LinearGradientBrush(new Rectangle(0, 0, this.Width, this.Height), Color.FromArgb(50, Color.White), Color.FromArgb(0, Color.White), LinearGradientMode.Vertical);

            // calculate how much has the RangeSlider to be filled for 'x' %
            int width = (int)((percent / 100) * this.Width);
            e.Graphics.FillRectangle(b, 0, 0, width, this.Height);
            e.Graphics.FillRectangle(lb, 0, 0, width, this.Height);
            b.Dispose(); lb.Dispose();
        }

        private void rangeSlider_SizeChanged(object sender, EventArgs e)
        {
            // maintain the label in the center of the RangeSlider
            label1.Location = new Point(this.Width / 2 - 21 / 2 - 4, this.Height / 2 - 15 / 2);
        }

        protected override void OnMouseClick(MouseEventArgs e)
        {
            int x = e.X;
            int y = e.Y;

            int val = (x * 100) / this.Width; //when click get value within progress bar
            int screenX = Cursor.Position.X;

            label1.Text = screenX.ToString();
            this.Value = val;
        }

        protected override void OnMouseMove(MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                //this.Value += 1;
                int x = e.X;
                int val = (x * 100) / this.Width; //when click get value within progress bar
                label1.Text = val.ToString();
                this.Value = val;
            }
        }

    }
}

原文：