using System;
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using System.Collections.Generic;
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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.Linq;
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using System.Text;
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using System.Windows.Forms;
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namespace DPumpHydr.WinFrmUI.WenSkin.Controls.ScrollBar
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{
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public class WenScrollBar : WenControl
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{
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public WenScrollBar() : base()
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{
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}
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#region 私有属性
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private Color sliderColor = Color.FromArgb(104, 104, 104);
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#endregion
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#region 共有属性
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public Color SliderColor { get => sliderColor; set => sliderColor = value; }
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#endregion
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#region 滚动条方向
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/// <summary>
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/// 方向
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/// </summary>
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public enum Orientation
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{
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/// <summary>
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/// 水平方向（从左到右）
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/// </summary>
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Horizontal_LR,
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/// <summary>
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/// 水平方向（从右到左）
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/// </summary>
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Horizontal_RL,
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/// <summary>
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/// 垂直方向（从上到上）
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/// </summary>
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Vertical_BT,
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/// <summary>
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/// 垂直方向（从上到下）
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/// </summary>
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Vertical_TB
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}
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/// <summary>
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/// 鼠标状态
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/// </summary>
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public enum MouseStatus
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{
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/// <summary>
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/// 鼠标进入
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/// </summary>
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Enter,
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/// <summary>
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/// 鼠标离开
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/// </summary>
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Leave,
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/// <summary>
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/// 鼠标按下
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/// </summary>
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Down,
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/// <summary>
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/// 鼠标按下释放
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/// </summary>
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Up
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}
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/// <summary>
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/// 滚动条方向
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/// </summary>
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public enum OrientationScrollBar
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{
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/// <summary>
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/// 水平方向
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/// </summary>
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Horizontal,
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/// <summary>
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/// 垂直方向
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/// </summary>
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Vertical
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}
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#endregion
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#region 委托
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public class LEventArgs : EventArgs
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{
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/// <summary>
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/// 事件数据
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/// </summary>
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/// <param name="value">值</param>
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public LEventArgs(object value)
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{
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Value = value;
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}
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/// <summary>
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/// 值
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/// </summary>
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public object Value { get; set; }
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}
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/// <summary>
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/// 滚动条事件数据
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/// </summary>
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public class LScrollEventArgs : EventArgs
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{
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/// <summary>
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/// 滚动条事件数据
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/// </summary>
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/// <param name="sliderPosition">滑块距顶部（垂直）/左侧（横向）位置</param>
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/// <param name="showPosition">显示位置（正数）</param>
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public LScrollEventArgs(float sliderPosition, float showPosition)
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{
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SliderPosition = sliderPosition;
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ShowPosition = showPosition;
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}
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/// <summary>
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/// 滑块距顶部（垂直）/左侧（横向）位置
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/// </summary>
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public float SliderPosition { get; set; }
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/// <summary>
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/// 显示位置（正数）
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/// </summary>
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public float ShowPosition { get; set; }
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}
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#endregion
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#region
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/// <summary>
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/// 委托
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/// </summary>
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/// <param name="sender"></param>
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/// <param name="e"></param>
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public delegate void LScrolledEventHandler(object sender, LScrollEventArgs e);
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/// <summary>
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/// 发生滚动时引发的事件
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/// </summary>
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public event LScrolledEventHandler LScrolled;
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#endregion
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#region Property
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private Color _BarColor = Color.FromArgb(224, 224, 224);//浅灰
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/// <summary>
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/// 背景条颜色
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/// </summary>
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[Category("DemoUI"), Description("背景条颜色")]
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public Color L_BarColor
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{
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get { return _BarColor; }
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set
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{
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_BarColor = value;
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Invalidate();
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}
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}
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private Color _SliderColor = Color.FromArgb(0, 192, 0);//绿
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/// <summary>
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/// 滑块颜色
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/// </summary>
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[Category("DemoUI"), Description("滑块颜色")]
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public Color L_SliderColor
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{
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get { return _SliderColor; }
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set
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{
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_SliderColor = value;
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colorDrawSlider = value;
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Invalidate();
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}
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}
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/// <summary>
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/// 鼠标进入时滑块颜色<para>默认：绿</para>
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/// </summary>
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[Category("DemoUI"), Description("鼠标进入时滑块颜色\r\n默认：绿")]
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public Color L_SliderMouseInColor { get; set; } = Color.Green;//绿
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private bool _IsRound = true;
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/// <summary>
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/// 是否是圆角<para>默认：是</para>
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/// </summary>
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[Category("DemoUI"), Description("是否是圆角\r\n默认：是")]
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public bool L_IsRound
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{
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get { return _IsRound; }
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set
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{
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_IsRound = value;
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Invalidate();
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}
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}
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private OrientationScrollBar _Orientation = OrientationScrollBar.Vertical;
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/// <summary>
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/// 方向<para>默认：水平，从左到右</para>
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/// </summary>
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[Category("DemoUI"), Description("方向\r\n默认：水平，从左到右")]
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public OrientationScrollBar L_Orientation
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{
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get { return _Orientation; }
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set
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{
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OrientationScrollBar old = _Orientation;
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_Orientation = value;
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if (old == OrientationScrollBar.Horizontal && _Orientation == OrientationScrollBar.Vertical)
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{
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Size = new Size(Size.Height, Size.Width);
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}
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if (_Orientation == OrientationScrollBar.Horizontal && old == OrientationScrollBar.Vertical)
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{
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Size = new Size(Size.Height, Size.Width);
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}
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Invalidate();
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}
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}
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private int _BarSize = 10;
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/// <summary>
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/// 滑条高度（水平）/宽度（垂直）
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/// </summary>
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[Category("DemoUI"), Description("滑条高度（水平）/宽度（垂直")]
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public int L_BarSize
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{
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get { return _BarSize; }
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set
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{
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_BarSize = value;
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if (_BarSize < 1) _BarSize = 1;
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if (_Orientation == OrientationScrollBar.Horizontal)
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{
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Size = new Size(Width, _BarSize);
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}
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else
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{
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Size = new Size(_BarSize, Height);
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}
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}
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}
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/// <summary>
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/// 滑块位置
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/// </summary>
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[Category("DemoUI"), Description("滑块位置"), Browsable(false)]
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public float L_Position { get; private set; } = 0f;
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private float _PageSize = 1f;
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/// <summary>
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/// 显示长度/每页长度
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/// </summary>
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[Category("DemoUI"), Description("显示长度/每页长度")]
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public float L_PageSize
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{
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get { return _PageSize; }
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set
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{
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_PageSize = value;
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pInit();
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pChangeSliderLocation();
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Invalidate();
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}
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}
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private float _DocSize = 1f;
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/// <summary>
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/// 文档长度
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/// </summary>
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[Category("DemoUI"), Description("文档长度")]
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public float L_DocSize
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{
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get { return _DocSize; }
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set
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{
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_DocSize = value;
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pInit();
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pChangeSliderLocation();
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Invalidate();
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}
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}
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/// <summary>
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/// 滑块可移动距离
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/// </summary>
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[Category("DemoUI"), Description("滑块可移动距离"), Browsable(false)]
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public float L_SliderMoveRange { get; private set; }
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/// <summary>
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/// 滑块长度
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/// </summary>
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[Category("DemoUI"), Description("滑块长度"), Browsable(false)]
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public float L_SliderLength { get; private set; }
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private float _ShowPosition = 0f;
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/// <summary>
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/// 显示位置（正数）
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/// </summary>
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[Category("DemoUI"), Description("显示位置（正数）"), Browsable(false)]
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public float L_ShowPosition
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{
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get { return _ShowPosition; }
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set
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{
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_ShowPosition = value;
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pShowPositionToPosition();
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Invalidate();
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}
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}
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/// <summary>
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/// 鼠标滚轮和上下左右键每次移动距离（对文档视图言）<para>默认：10</para>
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/// </summary>
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[Category("LESLIE_UI"), Description("鼠标滚轮和上下左右键每次移动距离（对文档视图言）\r\n默认：10")]
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public float L_ScrollInterval { get; set; } = 10f;
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/// <summary>
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/// 滑块最小长度<para>默认：20</para>
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/// </summary>
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[Category("DemoUI"), Description("滑块最小长度\r\n默认：20")]
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public float L_SliderMiniSize { get; set; } = 20f;
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#endregion
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#region
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private float fPageDocRatio, fShowScrollRatio, fAbove, fBelow, fCapWidth, fCapHalfWidth;
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private MouseStatus mouseStatus = MouseStatus.Leave;
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private Color colorDrawSlider = Color.FromArgb(0, 192, 0);//中绿
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#endregion
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#region
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void pInit()
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{
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fPageDocRatio = _PageSize / _DocSize;
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fCapWidth = _IsRound ? _BarSize : 0f;
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fCapHalfWidth = fCapWidth / 2f;
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if (_Orientation == OrientationScrollBar.Vertical)
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{
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L_SliderLength = fPageDocRatio * (Height - fCapWidth);
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if (L_SliderLength < L_SliderMiniSize) L_SliderLength = L_SliderMiniSize;
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L_SliderMoveRange = Height - fCapWidth - L_SliderLength;
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}
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else
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{
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L_SliderLength = fPageDocRatio * (Width - fCapWidth);
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if (L_SliderLength < L_SliderMiniSize) L_SliderLength = L_SliderMiniSize;
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L_SliderMoveRange = Width - fCapWidth - L_SliderLength;
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}
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fShowScrollRatio = L_SliderMoveRange == 0 ? 0 : (_DocSize - _PageSize) / L_SliderMoveRange;
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}
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void pShowPositionToPosition()
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{
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pInit();
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L_Position = fShowScrollRatio == 0 ? 0 : _ShowPosition / fShowScrollRatio;
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}
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void pChangeSliderLocation()
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{
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float fa = Height - fCapWidth;
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float fb = L_Position + L_SliderLength;
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if (fb > fa)
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{
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L_Position -= fb - fa;
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_ShowPosition = L_Position * fShowScrollRatio;
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}
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}
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int pCheckPointInSlider(PointF point)
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{
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if (_DocSize > _PageSize)
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{
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float fMin = L_Position;
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float fMax = L_Position + L_SliderLength;
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float fPoint, fEnd;
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if (_Orientation == OrientationScrollBar.Vertical)
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{
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fPoint = point.Y;
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fEnd = Height;
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}
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else
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{
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fPoint = point.X;
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fEnd = Width;
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}
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if (fPoint > 0 && fPoint < fMin) return 0;
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else if (fPoint > fMin && fPoint < fMax) return 1;
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else if (fPoint > fMax && fPoint < fEnd) return 2;
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else return -1;
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}
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else
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{
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return -1;
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}
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}
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#endregion
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protected override void SetBoundsCore(int x, int y, int width, int height, BoundsSpecified specified)
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{
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int iHeight = _BarSize;
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if (_Orientation == OrientationScrollBar.Horizontal)
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{
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base.SetBoundsCore(x, y, width, iHeight, specified);
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}
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else
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{
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base.SetBoundsCore(x, y, iHeight, height, specified);
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}
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}
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protected override void OnPaint(PaintEventArgs e)
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{
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base.OnPaint(e);
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pInit();
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e.Graphics.SmoothingMode = SmoothingMode.HighQuality;
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Pen penBar = new Pen(L_BarColor, _BarSize);
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Pen penSlider = new Pen(colorDrawSlider, _BarSize);
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if (_IsRound)
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{
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penBar.StartCap = LineCap.Round;
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penBar.EndCap = LineCap.Round;
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penSlider.StartCap = LineCap.Round;
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penSlider.EndCap = LineCap.Round;
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}
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if (_Orientation == OrientationScrollBar.Horizontal)
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{
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e.Graphics.DrawLine(penBar, fCapHalfWidth, Height / 2f, Width - fCapHalfWidth, Height / 2f);
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e.Graphics.DrawLine(penSlider, L_Position + fCapHalfWidth, Height / 2f, L_Position + L_SliderLength + fCapHalfWidth, Height / 2f);
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}
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else
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{
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e.Graphics.DrawLine(penBar, Width / 2f, fCapHalfWidth, Width / 2f, Height - fCapHalfWidth);
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e.Graphics.DrawLine(penSlider, Width / 2f, L_Position + fCapHalfWidth, Width / 2f, L_Position + L_SliderLength + fCapHalfWidth);
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}
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}
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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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Select();
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int i = pCheckPointInSlider(e.Location);
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if (i != -1)
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{
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if (i == 0)
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{
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//点在了滑块上方空白位置
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//‘上一页’，其实是减去_Page的量
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_ShowPosition -= _PageSize;
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if (_ShowPosition < 0) _ShowPosition = 0;
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pShowPositionToPosition();
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Invalidate();
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LScrolled?.Invoke(this, new LScrollEventArgs(L_Position, L_ShowPosition));
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}
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else if (i == 1)
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{
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//点在了滑块上
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//计算Above、Below
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mouseStatus = MouseStatus.Down;
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if (_Orientation == OrientationScrollBar.Vertical)
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{
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fAbove = e.Location.Y - L_Position;
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fBelow = L_Position + L_SliderLength - e.Location.Y;
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}
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else
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{
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fAbove = e.Location.X - L_Position;
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fBelow = L_Position + L_SliderLength - e.Location.X;
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}
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}
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else
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{
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//点在了滑块下方空白位置
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//‘下一页’，加上_Page的量
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_ShowPosition += _PageSize;
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pShowPositionToPosition();
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if (L_Position > L_SliderMoveRange)
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{
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L_Position = L_SliderMoveRange;
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_ShowPosition = L_Position * fShowScrollRatio;
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}
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Invalidate();
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LScrolled?.Invoke(this, new LScrollEventArgs(L_Position, L_ShowPosition));
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}
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}
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}
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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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if (mouseStatus == MouseStatus.Down)
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{
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//证明鼠标点在了滑块上
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if (_Orientation == OrientationScrollBar.Vertical)
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{
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L_Position = e.Location.Y - fAbove;
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}
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else
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{
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L_Position = e.Location.X - fAbove;
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}
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if (L_Position < 0) L_Position = 0;
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if (L_Position > L_SliderMoveRange) L_Position = L_SliderMoveRange;
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_ShowPosition = L_Position * fShowScrollRatio;
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Invalidate();
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LScrolled?.Invoke(this, new LScrollEventArgs(L_Position, L_ShowPosition));
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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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base.OnMouseUp(e);
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mouseStatus = MouseStatus.Up;
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}
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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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mouseStatus = MouseStatus.Enter;
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colorDrawSlider = L_SliderMouseInColor;
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Invalidate();
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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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mouseStatus = MouseStatus.Leave;
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colorDrawSlider = L_SliderColor;
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Invalidate();
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}
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protected override void OnMouseWheel(MouseEventArgs e)
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{
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base.OnMouseWheel(e);
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if (_DocSize > _PageSize)
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{
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bool bToDown = e.Delta > 0 ? false : true;
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float fZ = Convert.ToSingle(Math.Abs(e.Delta)) / 120f;
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if (bToDown)
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{
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_ShowPosition += L_ScrollInterval;
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pShowPositionToPosition();
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if (L_Position > L_SliderMoveRange)
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{
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L_Position = L_SliderMoveRange;
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_ShowPosition = L_Position * fShowScrollRatio;
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}
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Invalidate();
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LScrolled?.Invoke(this, new LScrollEventArgs(L_Position, L_ShowPosition));
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}
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else
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{
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_ShowPosition -= L_ScrollInterval;
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if (_ShowPosition < 0) _ShowPosition = 0;
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pShowPositionToPosition();
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Invalidate();
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LScrolled?.Invoke(this, new LScrollEventArgs(L_Position, L_ShowPosition));
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}
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}
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}
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protected override bool ProcessDialogKey(Keys keyData)
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{
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if (_DocSize > _PageSize)
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{
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if (_Orientation == OrientationScrollBar.Vertical)
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{
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if (keyData == Keys.Down || keyData == Keys.Up)
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{
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if (keyData == Keys.Down)
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{
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_ShowPosition += L_ScrollInterval;
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pShowPositionToPosition();
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if (L_Position > L_SliderMoveRange)
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{
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L_Position = L_SliderMoveRange;
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_ShowPosition = L_Position * fShowScrollRatio;
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}
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Invalidate();
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LScrolled?.Invoke(this, new LScrollEventArgs(L_Position, L_ShowPosition));
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}
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else
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{
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_ShowPosition -= L_ScrollInterval;
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if (_ShowPosition < 0) _ShowPosition = 0;
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pShowPositionToPosition();
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Invalidate();
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LScrolled?.Invoke(this, new LScrollEventArgs(L_Position, L_ShowPosition));
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}
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}
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}
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else
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{
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if (keyData == Keys.Right || keyData == Keys.Left)
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{
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if (keyData == Keys.Right)
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{
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_ShowPosition += L_ScrollInterval;
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pShowPositionToPosition();
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if (L_Position > L_SliderMoveRange)
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{
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L_Position = L_SliderMoveRange;
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_ShowPosition = L_Position * fShowScrollRatio;
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}
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Invalidate();
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LScrolled?.Invoke(this, new LScrollEventArgs(L_Position, L_ShowPosition));
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}
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else
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{
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_ShowPosition -= L_ScrollInterval;
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if (_ShowPosition < 0) _ShowPosition = 0;
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pShowPositionToPosition();
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Invalidate();
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LScrolled?.Invoke(this, new LScrollEventArgs(L_Position, L_ShowPosition));
|
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}
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}
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}
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}
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return base.ProcessDialogKey(keyData);
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}
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}
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}
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