480 lines
14 KiB
C#
480 lines
14 KiB
C#
/******************************************************************************
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* SunnyUI 开源控件库、工具类库、扩展类库、多页面开发框架。
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* CopyRight (C) 2012-2021 ShenYongHua(沈永华).
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* QQ群：56829229 QQ：17612584 EMail：SunnyUI@QQ.Com
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*
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* Blog: https://www.cnblogs.com/yhuse
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* Gitee: https://gitee.com/yhuse/SunnyUI
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* GitHub: https://github.com/yhuse/SunnyUI
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*
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* SunnyUI.dll can be used for free under the GPL-3.0 license.
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* If you use this code, please keep this note.
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* 如果您使用此代码，请保留此说明。
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******************************************************************************
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* 文件名称: UIScrollBar.cs
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* 文件说明: 滚动条
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* 当前版本: V3.0
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* 创建日期: 2020-01-01
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*
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* 2020-01-01: V2.2.0 增加文件说明
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* 2020-04-25: V2.2.4 更新主题配置类
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******************************************************************************/
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using System;
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using System.ComponentModel;
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using System.Drawing;
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using System.Windows.Forms;
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namespace Sunny.UI
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{
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[DefaultEvent("ValueChanged")]
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[DefaultProperty("Value")]
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[ToolboxItem(true)]
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public sealed class UIScrollBar : UIControl
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{
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public UIScrollBar()
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{
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Maximum = 100;
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up_state = value_state = down_state = DrawItemState.None;
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timer.Interval = 150;
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timer.Tick += TimerTick;
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Width = SystemInformation.VerticalScrollBarWidth + 2;
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Height = 300;
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ShowText = false;
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fillColor = UIColor.LightBlue;
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foreColor = UIColor.Blue;
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fillHoverColor = Color.FromArgb(111, 168, 255);
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fillPressColor = Color.FromArgb(74, 131, 229);
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}
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private int scrollValue;
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private int SmallChange = 1;
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private int LargeChange = 10;
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private int maximum = 100;
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private DrawItemState up_state, value_state, down_state;
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private DrawItemState up_state1, value_state1, down_state1;
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private bool dragMove;
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private int dragOffset;
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private int barHeight;
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private double percentValue;
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private readonly Timer timer = new Timer();
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private bool isScrollUp = true;
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private bool largeChange = true;
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public event EventHandler ValueChanged;
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~UIScrollBar()
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{
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timer.Stop();
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timer.Dispose();
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}
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[DefaultValue(0)]
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[Description("当前值"), Category("SunnyUI")]
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public int Value
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{
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get => scrollValue;
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set
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{
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scrollValue = Math.Min(maximum, value);
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scrollValue = Math.Max(scrollValue, 0);
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Invalidate();
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}
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}
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[DefaultValue(100)]
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[Description("最大值"), Category("SunnyUI")]
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public int Maximum
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{
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get => maximum;
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set
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{
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maximum = Math.Max(value, 1);
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SmallChange = value / 50;
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SmallChange = Math.Max(1, SmallChange);
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LargeChange = value / 10;
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LargeChange = Math.Max(1, LargeChange);
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CalcValueArea();
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Invalidate();
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}
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}
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protected override void OnSizeChanged(EventArgs e)
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{
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base.OnSizeChanged(e);
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CalcValueArea();
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}
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private void TimerTick(object sender, EventArgs e)
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{
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if (isScrollUp)
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ScrollUp(largeChange);
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else
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ScrollDown(largeChange);
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}
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private Rectangle GetUpRect()
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{
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var rect = new Rectangle(1, 1, Width - 2, 16);
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return rect;
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}
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private void CalcValueArea()
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{
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var centerHeight = GetValueClipRect().Height;
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barHeight = centerHeight / (maximum + 1);
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barHeight = Math.Max(30, barHeight);
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if (maximum == 0) maximum = 1;
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percentValue = ((double)centerHeight - barHeight) / maximum;
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}
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private Rectangle GetValueRect()
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{
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return new Rectangle(Width / 2 - 3, ValueToPos(scrollValue), 6, barHeight);
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}
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private int ValueToPos(int value)
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{
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return (int)(value * percentValue) + 17;
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}
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private int PosToValue(int pos)
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{
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var value = (int)((pos - 17) / percentValue);
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if (value < 0)
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value = 0;
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if (value > maximum)
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value = maximum;
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return value;
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}
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private Rectangle GetDownRect()
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{
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var rect = new Rectangle(1, Height - 17, Width - 2, 16);
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return rect;
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}
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private Rectangle GetValueClipRect()
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{
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var clip = new Rectangle(1, 17, Width - 2, Height - 17 * 2);
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return clip;
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}
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protected override void OnPaint(PaintEventArgs e)
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{
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e.Graphics.Clear(fillColor);
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DrawUpDownArrow(e.Graphics, up_state, GetUpRect(), true);
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DrawUpDownArrow(e.Graphics, down_state, GetDownRect(), false);
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DrawValueBar(e.Graphics, value_state);
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}
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private void DrawValueBar(Graphics g, DrawItemState state)
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{
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var rect = GetValueRect();
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Color clr = foreColor;
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if ((state & DrawItemState.HotLight) == DrawItemState.HotLight)
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{
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clr = fillHoverColor;
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}
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if ((state & DrawItemState.Selected) == DrawItemState.Selected)
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{
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clr = fillPressColor;
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}
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if (dragMove)
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{
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rect = new Rectangle(rect.Left, MousePos - barHeight / 2, rect.Width, barHeight);
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if (rect.Top < 17)
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{
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rect = new Rectangle(rect.Left, 17, rect.Width, barHeight);
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}
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if (rect.Bottom > Height - 17)
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{
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rect = new Rectangle(rect.Left, Height - 17 - barHeight, rect.Width, barHeight);
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}
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}
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g.SetHighQuality();
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g.FillRoundRectangle(clr, rect, 5);
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g.SetDefaultQuality();
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}
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private void DrawUpDownArrow(Graphics g, DrawItemState state, Rectangle rect, bool isUp)
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{
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Color clr_arrow = foreColor;
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if ((state & DrawItemState.HotLight) == DrawItemState.HotLight)
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{
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clr_arrow = fillHoverColor;
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}
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if ((state & DrawItemState.Selected) == DrawItemState.Selected)
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{
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clr_arrow = fillPressColor;
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}
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g.FillRectangle(fillColor, rect);
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g.SetHighQuality();
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using (var pen = new Pen(clr_arrow, 2))
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{
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Point pt1, pt2, pt3;
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if (!isUp)
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{
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pt1 = new Point(Width / 2 - 4, Height - 16 / 2 - 4);
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pt2 = new Point(Width / 2, Height - 16 / 2);
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pt3 = new Point(Width / 2 + 4, Height - 16 / 2 - 4);
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}
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else
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{
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pt1 = new Point(Width / 2 - 4, 16 / 2 + 4 - 1);
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pt2 = new Point(Width / 2, 16 / 2 - 1);
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pt3 = new Point(Width / 2 + 4, 16 / 2 + 4 - 1);
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}
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g.DrawLines(pen, new[] { pt1, pt2, pt3 });
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}
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g.SetDefaultQuality();
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}
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public void SetValue(int value)
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{
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if (value < 0)
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{
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value = 0;
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}
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if (value > maximum)
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{
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value = maximum;
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}
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scrollValue = value;
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ValueChanged?.Invoke(this, null);
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Invalidate();
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}
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public void ScrollUp(bool large)
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{
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SetValue(scrollValue - (large ? LargeChange : SmallChange));
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}
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public void ScrollDown(bool large)
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{
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SetValue(scrollValue + (large ? LargeChange : SmallChange));
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}
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private void StartScroll(bool up, bool large)
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{
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isScrollUp = up;
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largeChange = large;
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timer.Start();
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}
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private void StopScroll()
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{
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timer.Stop();
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}
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protected override void OnMouseDown(MouseEventArgs e)
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{
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if (e.Button != MouseButtons.Left)
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{
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return;
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}
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up_state = value_state = down_state = DrawItemState.None;
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IsPress = true;
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var hit = HitState(e.X, e.Y);
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switch (hit)
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{
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case 1:
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if (Value > 0)
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{
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up_state = DrawItemState.Selected;
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ScrollUp(false);
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StartScroll(true, false);
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}
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break;
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case 2:
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value_state = DrawItemState.Selected;
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dragMove = true;
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dragOffset = GetValueRect().Y - e.Y;
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break;
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case 3:
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if (Value < Maximum)
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{
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down_state = DrawItemState.Selected;
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ScrollDown(false);
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StartScroll(false, false);
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}
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break;
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case 4:
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if (Value > 0)
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{
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ScrollUp(true);
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if (IsPress)
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{
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StartScroll(true, true);
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}
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}
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break;
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case 5:
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if (Value < Maximum)
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{
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ScrollDown(false);
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if (IsPress)
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{
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StartScroll(false, true);
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}
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}
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break;
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}
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if (StateChange())
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{
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Invalidate();
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}
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}
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protected override void OnMouseUp(MouseEventArgs e)
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{
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IsPress = false;
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dragMove = false;
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StopScroll();
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Invalidate();
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}
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private int MousePos;
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protected override void OnMouseMove(MouseEventArgs e)
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{
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MousePos = e.Y;
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var hit = HitState(e.X, e.Y);
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up_state = value_state = down_state = DrawItemState.None;
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switch (hit)
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{
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case 1:
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up_state = IsPress ? DrawItemState.Selected : DrawItemState.HotLight;
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break;
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case 2:
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value_state = IsPress ? DrawItemState.Selected : DrawItemState.HotLight;
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break;
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case 3:
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down_state = IsPress ? DrawItemState.Selected : DrawItemState.HotLight;
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break;
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}
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if (dragMove)
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{
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var value = PosToValue(e.Y + dragOffset);
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SetValue(value);
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return;
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}
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if (StateChange())
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{
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Invalidate();
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}
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}
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protected override void OnMouseLeave(EventArgs e)
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{
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base.OnMouseLeave(e);
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up_state = down_state = value_state = DrawItemState.None;
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Invalidate();
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}
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private bool StateChange()
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{
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var change = up_state != up_state1 || down_state != down_state1 || value_state != value_state1;
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up_state1 = up_state;
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value_state1 = value_state;
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down_state1 = down_state;
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return change;
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}
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private int HitState(int x, int y)
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{
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var rect_up = GetUpRect();
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var rect_down = GetDownRect();
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var rect_value = GetValueRect();
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var rect_value_up = new Rectangle(0, rect_up.Bottom, Width, rect_value.Top - rect_up.Bottom);
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var rect_value_down = new Rectangle(0, rect_value.Bottom, Width, rect_down.Top - rect_value.Bottom);
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if (rect_up.Contains(x, y))
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return 1;
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else if (rect_down.Contains(x, y))
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return 3;
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else if (rect_value.Contains(x, y) || value_state == DrawItemState.Selected)
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return 2;
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else if (rect_value_up.Contains(x, y))
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return 4;
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else if (rect_value_down.Contains(x, y))
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return 5;
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else
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return -1;
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}
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public override void SetStyleColor(UIBaseStyle uiColor)
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{
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base.SetStyleColor(uiColor);
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if (uiColor.IsCustom()) return;
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fillColor = uiColor.PlainColor;
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foreColor = uiColor.ScrollBarForeColor;
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fillHoverColor = uiColor.ButtonFillHoverColor;
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fillPressColor = uiColor.ButtonFillPressColor;
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Invalidate();
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}
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/// <summary>
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/// 字体颜色
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/// </summary>
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[Description("字体颜色"), Category("SunnyUI")]
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[DefaultValue(typeof(Color), "80, 160, 255")]
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public override Color ForeColor
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{
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get => foreColor;
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set => SetForeColor(value);
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}
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/// <summary>
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/// 填充颜色，当值为背景色或透明色或空值则不填充
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/// </summary>
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[Description("填充颜色"), Category("SunnyUI")]
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[DefaultValue(typeof(Color), "235, 243, 255")]
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public Color FillColor
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{
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get => fillColor;
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set => SetFillColor(value);
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}
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[DefaultValue(typeof(Color), "111, 168, 255")]
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[Description("鼠标移上颜色"), Category("SunnyUI")]
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public Color HoverColor
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{
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get => fillHoverColor;
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set => SetFillHoveColor(value);
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}
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[DefaultValue(typeof(Color), "74, 131, 229")]
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[Description("鼠标按下颜色"), Category("SunnyUI")]
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public Color PressColor
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{
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get => fillPressColor;
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set => SetFillPressColor(value);
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}
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}
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} |