check point

framework/MaterialSkin.Core/Controls/MaterialProgressBar.cs

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+using System;
+using System.ComponentModel;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace MaterialSkin.Controls
+{
+    /// <summary>
+    /// Material design-like progress bar
+    /// </summary>
+    public class MaterialProgressBar : ProgressBar, IMaterialControl
+    {
+        private int _animation;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="MaterialProgressBar"/> class.
+        /// </summary>
+        public MaterialProgressBar()
+        {
+            SetStyle(ControlStyles.UserPaint, true);
+            SetStyle(ControlStyles.OptimizedDoubleBuffer, true);
+            Timer timer = new Timer();
+            timer.Interval = 33;
+            timer.Tick += Timer_Tick;
+            timer.Enabled = true;
+        }
+
+        private void Timer_Tick(object sender, EventArgs e)
+        {
+            Invalidate();
+        }
+
+        /// <summary>
+        /// Gets or sets the depth.
+        /// </summary>
+        /// <value>
+        /// The depth.
+        /// </value>
+        [Browsable(false)]
+        public int Depth { get; set; }
+
+        /// <summary>
+        /// Gets the skin manager.
+        /// </summary>
+        /// <value>
+        /// The skin manager.
+        /// </value>
+        [Browsable(false)]
+        public MaterialSkinManager SkinManager => MaterialSkinManager.Instance;
+
+        /// <summary>
+        /// Gets or sets the state of the mouse.
+        /// </summary>
+        /// <value>
+        /// The state of the mouse.
+        /// </value>
+        [Browsable(false)]
+        public MouseState MouseState { get; set; }
+
+        /// <summary>
+        /// Performs the work of setting the specified bounds of this control.
+        /// </summary>
+        /// <param name="x">The new <see cref="P:System.Windows.Forms.Control.Left" /> property value of the control.</param>
+        /// <param name="y">The new <see cref="P:System.Windows.Forms.Control.Top" /> property value of the control.</param>
+        /// <param name="width">The new <see cref="P:System.Windows.Forms.Control.Width" /> property value of the control.</param>
+        /// <param name="height">The new <see cref="P:System.Windows.Forms.Control.Height" /> property value of the control.</param>
+        /// <param name="specified">A bitwise combination of the <see cref="T:System.Windows.Forms.BoundsSpecified" /> values.</param>
+        protected override void SetBoundsCore(int x, int y, int width, int height, BoundsSpecified specified)
+        {
+            base.SetBoundsCore(x, y, width, 5, specified);
+        }
+
+        protected override void CreateHandle()
+        {
+            base.CreateHandle();
+            if (Style == ProgressBarStyle.Marquee)
+                StartAnimation();
+        }
+
+        private void StartAnimation()
+        {
+            _animation = 0;
+        }
+
+        /// <summary>
+        /// Raises the <see cref="E:System.Windows.Forms.Control.Paint" /> event.
+        /// </summary>
+        /// <param name="e">A <see cref="T:System.Windows.Forms.PaintEventArgs" /> that contains the event data.</param>
+        protected override void OnPaint(PaintEventArgs e)
+        {
+            if (Style == ProgressBarStyle.Marquee)
+            {
+                try
+                {
+
+                
+                
+                var animationProgress = (int)(e.ClipRectangle.Width * ((double)_animation / Maximum));
+                var doneProgress = (int)(e.ClipRectangle.Width * ((double)Value / Maximum));
+                if (doneProgress + animationProgress > e.ClipRectangle.Width)
+                    doneProgress = e.ClipRectangle.Width - animationProgress;
+
+                _animation+=Step;
+                if (_animation >= 100) _animation = -Value;
+                e.Graphics.FillRectangle(SkinManager.GetDisabledOrHintBrush(), 0, 0, e.ClipRectangle.Width, e.ClipRectangle.Height);
+                e.Graphics.FillRectangle(SkinManager.ColorScheme.PrimaryBrush, animationProgress, 0, doneProgress, e.ClipRectangle.Height);
+                //Task.Delay(33).ContinueWith((x) =>
+                //{
+                //    try
+                //    {
+                //        System.Action a = () => {  };
+                //        if (InvokeRequired)
+                //            Invoke(a);
+                //        else
+                //            a();
+                //    }catch{}
+
+                //});
+                }
+                catch (Exception exception)
+                {
+
+                }
+            }
+            else
+            {
+                var doneProgress = (int)(e.ClipRectangle.Width * ((double)Value / Maximum));
+                e.Graphics.FillRectangle(SkinManager.ColorScheme.PrimaryBrush, 0, 0, doneProgress, e.ClipRectangle.Height);
+                e.Graphics.FillRectangle(SkinManager.GetDisabledOrHintBrush(), doneProgress, 0, e.ClipRectangle.Width, e.ClipRectangle.Height);
+            }
+            
+        }
+    }
+}