72 lines
2.4 KiB
C#
72 lines
2.4 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Windows.Forms;
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using System.Threading.Tasks;
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using System.Drawing;
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using System.Drawing.Drawing2D;
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using System.Diagnostics;
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using System.IO;
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namespace ImageCompressor
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{
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/// <summary>
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/// ProgressBar类有点问题，重写一个简单的ProgressBar。
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/// </summary>
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internal class NewProgressPanel:Panel
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{
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public Font TextFont;
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public Brush TextForeColor;
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public NewProgressPanel(Font textFont,Color textForeColor)
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{
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this.TextFont = textFont;
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this.TextForeColor = new SolidBrush(textForeColor);
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SetStyle(ControlStyles.ResizeRedraw, true);
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this.foreBrush = new SolidBrush(Color.Gray);
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}
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/// <summary>
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/// 克隆原来的Panel以实现设计的参数传递。
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/// </summary>
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/// <param name="raw"></param>
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public void Clone(Panel raw)
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{
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this.Size = raw.Size;
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this.Bounds = raw.Bounds;
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this.Anchor = raw.Anchor;
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this.BorderStyle = raw.BorderStyle;
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this.Name = raw.Name;
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this.TabIndex = raw.TabIndex;
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this.BackColor= raw.BackColor;
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this.ForeColor = raw.ForeColor;
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}
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public double ProgressValue { get; set; }
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Brush foreBrush;
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/// <summary>
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/// 绘制背景，快但是不能耗时太久，会闪
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/// </summary>
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/// <param name="e"></param>
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protected override void OnPaintBackground(PaintEventArgs e)
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{
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e.Graphics.Clear(this.BackColor);
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e.Graphics.FillRectangle(foreBrush, 0, 0, (int)((double)e.ClipRectangle.Width * ProgressValue), e.ClipRectangle.Height);
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}
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/// <summary>
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/// 绘制耗时较多的部分
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/// </summary>
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/// <param name="e"></param>
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protected override void OnPaint(PaintEventArgs e)
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{
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base.OnPaint(e);//控件必须通过重写它从 Control 继承的 OnPaint 方法来提供呈现逻辑。
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//测量string应该较为耗时，放在此处绘制
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SizeF size = e.Graphics.MeasureString(Text, TextFont);
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if (!string.IsNullOrEmpty(Text))
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e.Graphics.DrawString(Text, TextFont, TextForeColor, Width / 2 - size.Width / 2, Height - size.Height - 2);
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}
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}
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}
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