这篇文章对我帮助极大，我模仿着写了两遍大概摸清楚了自定义控件的流程。https://www.cnblogs.com/lesliexin/p/13265707.html 感谢大佬 leslie_xin
样式
最开始
进度条有更改
根据开始时间和结束时间 时间刻度间隔有更改
设置项
正文
首先，我模仿过leslie_xin,写过一个进度条，用于播放视频，但是没有刻度，现在没有刻度不行，所以要搞一个刻度，计划使用GDI+
然后，发现https://www.cnblogs.com/lesliexin/p/13265707.html 这个控件里的长、宽不能修改，不然得自己再计算细节性得问题，就打算继承UserControl，把leslie_xin的进度条拖放进来
```UserControl```就把他当成正常窗口写，改写啥就写啥
正经脸
首先，能够满足自定以的进度条样式吧，比如前景色、背景色、进度的颜色，所以有了
private Color _BarBackColor = Color.FromArgb(128, 255, 128);
[Category("TimeTrackBarControl"), Description("进度条背景色")]
public Color BarBackColor
{
get
{
return this.trackBar.BarBackColor;
}
set
{
_BarBackColor = value;
this.trackBar.BarBackColor = _BarBackColor;
Invalidate();
}
}
private Color _BarSliderColor = Color.FromArgb(64, 128, 64);
[Category("TimeTrackBarControl"), Description("进度条滑块颜色
有值部分的颜色")]
public Color BarSliderColor
{
get
{
return this.trackBar.SliderColor;
}
set
{
_BarSliderColor = value;
this.trackBar.SliderColor = _BarSliderColor;
Invalidate();
}
}
然后因为要显示时间、开始时间、结束时间，所以又有了
private DateTime _StartTime = DateTime.Now.AddHours(-1);
[Category("TimeTrackBarControl"), Description("开始时间")]
public DateTime StartTime
{
get
{
return _StartTime;
}
set
{
_StartTime = value;
//if (_StartTime > _EndTime) _StartTime = _EndTime.AddMinutes(-1);
_BarMaximum = (_EndTime - _StartTime).TotalSeconds.ToInt();
this.trackBar.Maximum = _BarMaximum;
this.trackBar.Minimum = 0;
Invalidate();
}
}
private DateTime _EndTime = DateTime.Now;
[Category("TimeTrackBarControl"), Description("结束时间")]
public DateTime EndTime
{
get
{
return _EndTime;
}
set
{
_EndTime = value;
//if (_EndTime < _StartTime) _EndTime = _StartTime.AddMinutes(1);
_BarMaximum = (_EndTime - _StartTime).TotalSeconds.ToInt();
this.trackBar.Maximum = _BarMaximum;
this.trackBar.Minimum = 0;
Invalidate();
}
}
再次因为要纪录进度条的值、最大值、最小值为0，记个der~，（我也不知道为啥会有这样值，脑子可能有它自己的想法）所以还有
private int _BarMaximum = 0;
[Category("TimeTrackBarControl"), Description("最大值
默认：0，由开始时间和结束时间决定（只读）")]
public int BarMaximum
{
get
{
return _BarMaximum;
}
}
private int _BarCurValue = 0;
[Category("TimeTrackBarControl"), Description("当前值")]
public int BarCurValue
{
get
{
_BarCurValue = this.trackBar.CurValue;
return _BarCurValue;
}
set
{
_BarCurValue = value;
if (_BarCurValue < 0) _BarCurValue = 0;
if (_BarCurValue > _BarMaximum) _BarCurValue = _BarMaximum;
this.trackBar.CurValue = _BarCurValue;
BarCurValueChanged?.Invoke(this, new CurValueEventArgs(_BarCurValue));
}
}
你这个时间刻度总得有颜色吧，总不能是皇帝的时间刻度，进度条的值对应的时间label也得有样式吧，皇帝也没有label啊，所以双有了
private Color _TimeScaleColor = Color.FromArgb(210, 210, 210);
[Category("TimeTrackBarControl"), Description("时间刻度的颜色")]
public Color TimeScaleColor
{
get
{
return _TimeScaleColor;
}
set
{
_TimeScaleColor = value;
Invalidate();
}
}
private int _ScaleInterval = 1200;
[Category("TimeTrackBarControl"), Description("时间刻度之间相隔秒数，小于零表示自适应
单位：秒")]
public int ScaleInterval
{
get
{
return _ScaleInterval;
}
set
{
_ScaleInterval = value;
//if (_ScaleInterval <= 0)
//{
// _ScaleInterval = 1800;
//}
Invalidate();
}
}
private int _RealScaleInterval = 1200;
[Category("TimeTrackBarControl"), Description("实际相隔的秒数（为了显示自适应时真实的间隔时间）
单位：秒")]
public int RealScaleInterval
{
get
{
_RealScaleInterval = _ScaleInterval > 0 ? _ScaleInterval : _RealScaleInterval;
return _RealScaleInterval;
}
}
private Color _TimeLabelBackColor = Color.FromArgb(255, 192, 192);
[Category("TimeTrackBarControl"), Description("时间label背景色")]
public Color TimeLabelBackColor
{
get
{
return _TimeLabelBackColor;
}
set
{
_TimeLabelBackColor = value;
Invalidate();
}
}
private Color _TimeLabelForeColor = Color.FromArgb(192,255,192);
[Category("TimeTrackBarControl"), Description("时间label前景色")]
public Color TimeLabelForeColor
{
get
{
return _TimeLabelForeColor;
}
set
{
_TimeLabelForeColor = value;
Invalidate();
}
}
最后你这个时间刻度总得能够直接跳到某个时间点吧，所以叒有
public void SeekByTime(DateTime time)
{
BarCurValue = (time - StartTime).TotalSeconds.ToInt();
}
你搞了那么多样式，总得有人去画吧，所以叕有了
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
}
时间刻度呢？总得去生成吧，所以我们要计算一下，每个刻度之间间隔多少秒钟，毕竟进度条的最小值为零，最大值为开始时间和最小时间间隔的秒数。
所以：1、计算间隔
2、计算时间刻度的坐标
3、画出来
/// <summary>
/// 微软雅黑 regular 10F 23:56分约占38个像素，现定为45个像素为最小值，时间刻度：60秒为最小值
/// </summary>
/// <returns></returns>
private int SelfAdaption()
{
float radio = 45 * 1.0f / trackBar.Width;//45个像素占进度条总长的比例
double interval = (_EndTime - _StartTime).TotalSeconds * radio;//这个比例下，占多长的时间
if (interval<=60)
{
interval = 60;
}
else if (interval>60 && interval <= 300)
{
interval = 300;
}
else if (interval >300 && interval <= 600)
{
interval = 600;
}
else if (interval >600 && interval <= 1200)
{
interval = 1200;
}
else if (interval > 1200 && interval <= 1800)
{
interval = 1800;
}
else if (interval > 1800 && interval <= 3600)
{
interval = 3600;
}
return Convert.ToInt32(interval);
}
/// <summary>
/// 要划线的坐标
/// </summary>
/// <param name="intervalSec"></param>
/// <returns></returns>
private List<TimeScaleLocation> TimeScaleList()
{
DateTime time = _StartTime;
if (_ScaleInterval<0)
{
_RealScaleInterval = SelfAdaption();
}
else
{
_RealScaleInterval = _ScaleInterval;
}
List<TimeScaleLocation> scales = new List<TimeScaleLocation>();
TimeScaleLocation start_scale = new TimeScaleLocation(trackBar.Location.X, trackBar.Location.Y + trackBar.Height / 2, _StartTime);
scales.Add(start_scale);
while (time.AddSeconds(_RealScaleInterval) < _EndTime)
{
time = time.AddSeconds(_RealScaleInterval);
int val = (time - _StartTime).TotalSeconds.ToInt();
float radio = val * 1.0f / _BarMaximum;
int x = trackBar.Location.X + Convert.ToInt32(trackBar.Width * radio);
int y = trackBar.Location.Y;
TimeScaleLocation scale = new TimeScaleLocation(x, y, time);
scales.Add(scale);
}
int end_x = trackBar.Location.X + trackBar.Width;
int end_y = trackBar.Location.Y + trackBar.Height / 2;
TimeScaleLocation end_scale = new TimeScaleLocation(end_x, end_y, _EndTime);
scales.Add(end_scale);
return scales;
}
// 完全体的OnPaint方法
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
ChangeStyle();
e.Graphics.SmoothingMode = SmoothingMode.HighQuality;
Pen pen = new Pen(_TimeScaleColor, 1);
Brush brush = new SolidBrush(_TimeScaleColor);
Font font = new Font("微软雅黑", 10, FontStyle.Regular, GraphicsUnit.Point, (byte)134);
List<TimeScaleLocation> scales = TimeScaleList();
for (int i = 0; i < scales.Count; i++)
{
TimeScaleLocation item = scales[i];
int length = 15;
if (_RealScaleInterval * i % 3600 == 0)
{
length = length + trackBar.Height * 1;
}
if (i == 0 || i == scales.Count - 1)
{
length = (int)(length + trackBar.Height * 1.5);
}
if (i == 0)
{
item.x -= 1;
}
e.Graphics.DrawLine(pen, item.x, item.y, item.x, item.y - length);
e.Graphics.DrawString(item.time.ToString("HH:mm"), font, brush, new Point(item.x - 19, item.y - length - trackBar.Height * 2));
}
}
// 设置label样式，onpaint方法调用
private void ChangeStyle()
{
this.timeLabel.BackColor = _TimeLabelBackColor;
this.timeLabel.ForeColor = _TimeLabelForeColor;
}
是不是发现有个TimeScaleLocation不知道是啥？
using System;
namespace QAQ.Controls
{
/// <summary>
/// 时间刻度信息
/// </summary>
public class TimeScaleLocation
{
/// <summary>
/// time对应在进度条上的点的x坐标
/// </summary>
public int x { get; set; }
/// <summary>
/// time对应在进度条上的点的y坐标
/// </summary>
public int y { get; set; }
/// <summary>
/// time时间点
/// </summary>
public DateTime time{get;set;}
public TimeScaleLocation(int x, int y, DateTime time)
{
this.x = x;
this.y = y;
this.time = time;
}
}
}
哦，我亲爱的老伙计，我好像忘记了把事件加上来了，我今天得罚我自己吃三大碗饭，治治我这个不长记性的脑子。所以这个事件我借用那个大佬的
#region 事件,
public delegate void CurValueChangedEventHandler(object sender, CurValueEventArgs e);
/// <summary>
/// 值发生改变时引发的事件
/// </summary>
public event CurValueChangedEventHandler BarCurValueChanged;
#endregion
收获
1、markdown 不会使，排版全用######
####### 我太难了
2、在UserControl中，如果不是其他控件的事件，那么将事件替换为OnXXX(),例如：Click替换为OnClick(),这样好像比较快，尤其是鼠标事件
3、注意循环调用，比如修改 BarCurValue时修改了this.trackBar.value还加了事件,然后又在this.trackBar的valueChanged事件中修改了BarCurValue,然后就会发现vs好像累了，它不想理你了，怎么挑逗都不起作用了outofstrack?还是其他的啥玩意。就是这两个发生了循环调用
4、这个版本有点小问题，修改办法放在收获中
其他，未知，忘记了，等我记起了再补充。退朝~
完整内容
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;
namespace QAQ.Controls
{
[DefaultEvent("CurValueChanged")]
public partial class TimeTrackBarControl : UserControl
{
public TimeTrackBarControl()
{
InitializeComponent();
}
#region 事件
public delegate void CurValueChangedEventHandler(object sender, CurValueEventArgs e);
/// <summary>
/// 值发生改变时引发的事件
/// </summary>
public event CurValueChangedEventHandler BarCurValueChanged;
#endregion
private Color _BarBackColor = Color.FromArgb(128, 255, 128);
[Category("TimeTrackBarControl"), Description("进度条背景色")]
public Color BarBackColor
{
get
{
return this.trackBar.BarBackColor;
}
set
{
_BarBackColor = value;
this.trackBar.BarBackColor = _BarBackColor;
Invalidate();
}
}
private Color _BarSliderColor = Color.FromArgb(64, 128, 64);
[Category("TimeTrackBarControl"), Description("进度条滑块颜色
有值部分的颜色")]
public Color BarSliderColor
{
get
{
return this.trackBar.SliderColor;
}
set
{
_BarSliderColor = value;
this.trackBar.SliderColor = _BarSliderColor;
Invalidate();
}
}
private DateTime _StartTime = DateTime.Now.AddHours(-1);
[Category("TimeTrackBarControl"), Description("开始时间")]
public DateTime StartTime
{
get
{
return _StartTime;
}
set
{
_StartTime = value;
//if (_StartTime > _EndTime) _StartTime = _EndTime.AddMinutes(-1);
_BarMaximum = (_EndTime - _StartTime).TotalSeconds.ToInt();
this.trackBar.Maximum = _BarMaximum;
this.trackBar.Minimum = 0;
Invalidate();
}
}
private DateTime _EndTime = DateTime.Now;
[Category("TimeTrackBarControl"), Description("结束时间")]
public DateTime EndTime
{
get
{
return _EndTime;
}
set
{
_EndTime = value;
//if (_EndTime < _StartTime) _EndTime = _StartTime.AddMinutes(1);
_BarMaximum = (_EndTime - _StartTime).TotalSeconds.ToInt();
this.trackBar.Maximum = _BarMaximum;
this.trackBar.Minimum = 0;
Invalidate();
}
}
private int _BarMaximum = 0;
[Category("TimeTrackBarControl"), Description("最大值
默认：0，由开始时间和结束时间决定（只读）")]
public int BarMaximum
{
get
{
return _BarMaximum;
}
}
private int _BarCurValue = 0;
[Category("TimeTrackBarControl"), Description("当前值")]
public int BarCurValue
{
get
{
_BarCurValue = this.trackBar.CurValue;
return _BarCurValue;
}
set
{
_BarCurValue = value;
if (_BarCurValue < 0) _BarCurValue = 0;
if (_BarCurValue > _BarMaximum) _BarCurValue = _BarMaximum;
this.trackBar.CurValue = _BarCurValue;
BarCurValueChanged?.Invoke(this, new CurValueEventArgs(_BarCurValue));
}
}
private Color _TimeScaleColor = Color.FromArgb(210, 210, 210);
[Category("TimeTrackBarControl"), Description("时间刻度的颜色")]
public Color TimeScaleColor
{
get
{
return _TimeScaleColor;
}
set
{
_TimeScaleColor = value;
Invalidate();
}
}
private int _ScaleInterval = 1200;
[Category("TimeTrackBarControl"), Description("时间刻度之间相隔秒数，小于零表示自适应
单位：秒")]
public int ScaleInterval
{
get
{
return _ScaleInterval;
}
set
{
_ScaleInterval = value;
//if (_ScaleInterval <= 0)
//{
// _ScaleInterval = 1800;
//}
Invalidate();
}
}
private int _RealScaleInterval = 1200;
[Category("TimeTrackBarControl"), Description("实际相隔的秒数（为了显示自适应时真实的间隔时间）
单位：秒")]
public int RealScaleInterval
{
get
{
_RealScaleInterval = _ScaleInterval > 0 ? _ScaleInterval : _RealScaleInterval;
return _RealScaleInterval;
}
}
private Color _TimeLabelBackColor = Color.FromArgb(255, 192, 192);
[Category("TimeTrackBarControl"), Description("时间label背景色")]
public Color TimeLabelBackColor
{
get
{
return _TimeLabelBackColor;
}
set
{
_TimeLabelBackColor = value;
Invalidate();
}
}
private Color _TimeLabelForeColor = Color.FromArgb(192,255,192);
[Category("TimeTrackBarControl"), Description("时间label前景色")]
public Color TimeLabelForeColor
{
get
{
return _TimeLabelForeColor;
}
set
{
_TimeLabelForeColor = value;
Invalidate();
}
}
public void SeekByTime(DateTime time)
{
BarCurValue = (time - StartTime).TotalSeconds.ToInt();
}
#region 一些系统事件
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
ChangeStyle();
e.Graphics.SmoothingMode = SmoothingMode.HighQuality;
Pen pen = new Pen(_TimeScaleColor, 1);
Brush brush = new SolidBrush(_TimeScaleColor);
Font font = new Font("微软雅黑", 10, FontStyle.Regular, GraphicsUnit.Point, (byte)134);
List<TimeScaleLocation> scales = TimeScaleList();
for (int i = 0; i < scales.Count; i++)
{
TimeScaleLocation item = scales[i];
int length = 15;
if (_RealScaleInterval * i % 3600 == 0)
{
length = length + trackBar.Height * 1;
}
if (i == 0 || i == scales.Count - 1)
{
length = (int)(length + trackBar.Height * 1.5);
}
if (i == 0)
{
item.x -= 1;
}
e.Graphics.DrawLine(pen, item.x, item.y, item.x, item.y - length);
e.Graphics.DrawString(item.time.ToString("HH:mm"), font, brush, new Point(item.x - 19, item.y - length - trackBar.Height * 2));
}
}
protected override void OnMouseDown(MouseEventArgs e)
{
base.OnMouseDown(e);
}
protected override void OnMouseMove(MouseEventArgs e)
{
base.OnMouseMove(e);
}
protected override void OnMouseUp(MouseEventArgs e)
{
base.OnMouseUp(e);
}
protected override void OnMouseEnter(EventArgs e)
{
base.OnMouseEnter(e);
}
protected override void OnMouseLeave(EventArgs e)
{
base.OnMouseLeave(e);
}
protected override void OnSizeChanged(EventArgs e)
{
base.OnSizeChanged(e);
int x = (this.Width - this.timeLabel.Width) / 2;
int y = this.timeLabel.Location.Y;
this.timeLabel.Location = new Point(x, y);
}
/// <summary>
/// 要划线的坐标
/// </summary>
/// <param name="intervalSec"></param>
/// <returns></returns>
private List<TimeScaleLocation> TimeScaleList()
{
DateTime time = _StartTime;
if (_ScaleInterval<0)
{
_RealScaleInterval = SelfAdaption();
}
else
{
_RealScaleInterval = _ScaleInterval;
}
List<TimeScaleLocation> scales = new List<TimeScaleLocation>();
TimeScaleLocation start_scale = new TimeScaleLocation(trackBar.Location.X, trackBar.Location.Y + trackBar.Height / 2, _StartTime);
scales.Add(start_scale);
while (time.AddSeconds(_RealScaleInterval) < _EndTime)
{
time = time.AddSeconds(_RealScaleInterval);
int val = (time - _StartTime).TotalSeconds.ToInt();
float radio = val * 1.0f / _BarMaximum;
int x = trackBar.Location.X + Convert.ToInt32(trackBar.Width * radio);
int y = trackBar.Location.Y;
TimeScaleLocation scale = new TimeScaleLocation(x, y, time);
scales.Add(scale);
}
int end_x = trackBar.Location.X + trackBar.Width;
int end_y = trackBar.Location.Y + trackBar.Height / 2;
TimeScaleLocation end_scale = new TimeScaleLocation(end_x, end_y, _EndTime);
scales.Add(end_scale);
return scales;
}
/// <summary>
/// 微软雅黑 regular 10F 23:56分约占38个像素，现定为45个像素为最小值，时间刻度：60秒为最小值
/// </summary>
/// <returns></returns>
private int SelfAdaption()
{
float radio = 45 * 1.0f / trackBar.Width;//45个像素占进度条总长的比例
double interval = (_EndTime - _StartTime).TotalSeconds * radio;//这个比例下，占多长的时间
if (interval<=60)
{
interval = 60;
}
else if (interval>60 && interval <= 300)
{
interval = 300;
}
else if (interval >300 && interval <= 600)
{
interval = 600;
}
else if (interval >600 && interval <= 1200)
{
interval = 1200;
}
else if (interval > 1200 && interval <= 1800)
{
interval = 1800;
}
else if (interval > 1800 && interval <= 3600)
{
interval = 3600;
}
return Convert.ToInt32(interval);
}
private void ChangeStyle()
{
this.timeLabel.BackColor = _TimeLabelBackColor;
this.timeLabel.ForeColor = _TimeLabelForeColor;
}
#endregion
/// <summary>
/// 为了实时改变显示的值
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void TrackBar_CurValueChanged(object sender, CurValueEventArgs e)
{
BarCurValueChanged?.Invoke(this, new CurValueEventArgs(e.Value));
timeLabel.Text = _StartTime.AddSeconds(e.Value).ToString("HH:mm:ss");
}
}
}
哦，要和大佬的例子放在一起，因为借用了他的控件和事件。还有，大佬的文章末尾有大佬代码的下载链接，嘿嘿~
没有七个#号的样式
####### 不信你看