323 lines
9.7 KiB
C#
323 lines
9.7 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) 2012-2025 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: UIVerScrollBarEx.cs
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* 文件说明: 垂直滚动条
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* 当前版本: V3.1
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* 创建日期: 2020-08-29
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*
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* 2020-08-29: V2.2.7 新增垂直滚动条
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* 2022-03-19: V3.1.1 重构主题配色
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* 2022-11-03: V3.2.6 增加了可设置垂直滚动条宽度的属性
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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.Drawing.Drawing2D;
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using System.Windows.Forms;
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namespace Sunny.UI
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{
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[ToolboxItem(true)]
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[Description("垂直滚动条控件")]
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public class UIVerScrollBarEx : UIControl
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{
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public UIVerScrollBarEx()
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{
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SetStyleFlags(true, false);
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ShowText = false;
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ShowRect = false;
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Width = ScrollBarInfo.VerticalScrollBarWidth() + 1;
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fillColor = UIStyles.Blue.ScrollBarFillColor;
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foreColor = UIStyles.Blue.ScrollBarForeColor;
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fillHoverColor = UIStyles.Blue.ScrollBarFillHoverColor;
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fillPressColor = UIStyles.Blue.ScrollBarFillPressColor;
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}
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private int fillWidth = 6;
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[DefaultValue(6)]
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public int FillWidth
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{
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get => fillWidth;
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set
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{
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fillWidth = Math.Max(6, value);
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Invalidate();
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}
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}
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private int maximum = 100;
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[DefaultValue(100)]
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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 = value.GetLowerLimit(2);
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Invalidate();
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}
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}
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[DefaultValue(10)]
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public int LargeChange { get; set; } = 10;
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private int thisValue;
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public event EventHandler ValueChanged;
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[DefaultValue(0)]
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public int Value
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{
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get => thisValue;
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set
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{
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thisValue = value.GetLowerLimit(0);
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thisValue = value.GetUpperLimit(Maximum - BoundsHeight);
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Invalidate();
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}
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}
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private int boundsHeight = 10;
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[DefaultValue(10)]
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public int BoundsHeight
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{
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get => boundsHeight;
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set
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{
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boundsHeight = value.GetLowerLimit(1);
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Invalidate();
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}
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}
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public int LeftButtonPos => 16;
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public int RightButtonPos => Height - 16;
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/// <summary>
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/// 绘制填充颜色
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/// </summary>
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/// <param name="g">绘图图面</param>
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/// <param name="path">绘图路径</param>
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protected override void OnPaintFill(Graphics g, GraphicsPath path)
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{
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base.OnPaintFill(g, path);
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g.Clear(fillColor);
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DrawUpDownArrow(g, true);
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DrawUpDownArrow(g, false);
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DrawValueBar(g);
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}
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private void DrawValueBar(Graphics g)
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{
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Color clr = foreColor;
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if (inCenterArea && IsPress)
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{
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clr = fillPressColor;
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}
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int top = 16 + Value * (Height - 32) / Maximum;
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int height = BoundsHeight * (Height - 32) / Maximum;
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g.SetHighQuality();
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int w = Math.Max(6, fillWidth);
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g.FillRoundRectangle(clr, new Rectangle(Width / 2 - w / 2, top, w, height), 5);
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g.SetDefaultQuality();
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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 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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/// <summary>
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/// 重载鼠标按下事件
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/// </summary>
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/// <param name="e">鼠标参数</param>
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protected override void OnMouseDown(MouseEventArgs e)
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{
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base.OnMouseDown(e);
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IsPress = true;
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if (inLeftArea)
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{
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int value = (Value - LargeChange).GetLimit(0, Maximum - BoundsHeight);
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Value = value;
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ValueChanged?.Invoke(this, EventArgs.Empty);
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}
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if (inRightArea)
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{
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int value = (Value + LargeChange).GetLimit(0, Maximum - BoundsHeight);
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Value = value;
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ValueChanged?.Invoke(this, EventArgs.Empty);
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}
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if (inCenterArea)
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{
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int y = BoundsHeight * (Height - 32) / Maximum;
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int value = (e.Location.Y - y / 2) * maximum / (Height - 32);
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value = value.GetLimit(0, Maximum - BoundsHeight);
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Value = value;
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ValueChanged?.Invoke(this, EventArgs.Empty);
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}
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}
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/// <summary>
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/// 重载鼠标抬起事件
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/// </summary>
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/// <param name="e">鼠标参数</param>
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protected override void OnMouseUp(MouseEventArgs e)
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{
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base.OnMouseUp(e);
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IsPress = false;
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Invalidate();
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}
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/// <summary>
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/// 重载鼠标离开事件
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/// </summary>
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/// <param name="e">鼠标参数</param>
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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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IsPress = false;
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Invalidate();
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}
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/// <summary>
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/// 重载鼠标进入事件
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/// </summary>
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/// <param name="e">鼠标参数</param>
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protected override void OnMouseEnter(EventArgs e)
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{
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base.OnMouseEnter(e);
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Invalidate();
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}
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private void DrawUpDownArrow(Graphics g, bool isUp)
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{
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Color clr_arrow = foreColor;
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if ((inLeftArea || inRightArea) && IsPress)
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{
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clr_arrow = fillPressColor;
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}
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g.FillRectangle(fillColor, isUp ? GetUpRect() : GetDownRect());
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g.SetHighQuality();
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using var pen = new Pen(clr_arrow, 2);
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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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g.SetDefaultQuality();
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}
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private bool inLeftArea, inRightArea, inCenterArea;
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/// <summary>
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/// 重载鼠标移动事件
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/// </summary>
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/// <param name="e">鼠标参数</param>
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protected override void OnMouseMove(MouseEventArgs e)
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{
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base.OnMouseMove(e);
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inLeftArea = e.Location.Y < LeftButtonPos;
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inRightArea = e.Location.Y > RightButtonPos;
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inCenterArea = e.Location.Y >= LeftButtonPos && e.Location.Y <= RightButtonPos;
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if (inCenterArea && IsPress)
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{
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int y = BoundsHeight * (Height - 32) / Maximum;
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int value = (e.Location.Y - y / 2) * maximum / (Height - 32);
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value = value.GetLimit(0, Maximum - BoundsHeight);
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Value = value;
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ValueChanged?.Invoke(this, EventArgs.Empty);
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}
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}
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/// <summary>
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/// 设置主题样式
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/// </summary>
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/// <param name="uiColor">主题样式</param>
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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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fillColor = uiColor.ScrollBarFillColor;
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foreColor = uiColor.ScrollBarForeColor;
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fillHoverColor = uiColor.ScrollBarFillHoverColor;
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fillPressColor = uiColor.ScrollBarFillPressColor;
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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), "243, 249, 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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[Description("鼠标移上颜色"), Category("SunnyUI")]
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[DefaultValue(typeof(Color), "115, 179, 255")]
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public Color HoverColor
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{
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get => fillHoverColor;
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set => SetFillHoverColor(value);
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}
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[Description("鼠标按下颜色"), Category("SunnyUI")]
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[DefaultValue(typeof(Color), "64, 128, 204")]
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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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}
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