333 lines
11 KiB
C#
333 lines
11 KiB
C#
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.Windows.Forms;
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namespace ryControls
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{
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/// <summary>
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/// 图标列表控件
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/// </summary>
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public class IconViewEx : ListView
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{
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private ColumnHeader columnHeader1;
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/// <summary>
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/// 图标列表控件
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/// </summary>
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public IconViewEx() :
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base()
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{
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// 开启双缓冲
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this.SetStyle(ControlStyles.OptimizedDoubleBuffer | ControlStyles.AllPaintingInWmPaint, true);
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this.OwnerDraw = true;//用于启用重绘
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this.View = View.Tile;
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this.TileSize = new Size(100,100);
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this.MultiSelect = false;
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}
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private int iconsize = 64;
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/// <summary>
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/// 图标大小
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/// </summary>
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[Description("图标大小")]
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public int IconSize {
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get { return iconsize; }
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set
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{
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if(value>14 && value<=512)
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{
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iconsize = value;
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}
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else { iconsize = 64; }
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}
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}
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private int textheight = 20;
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/// <summary>
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/// 文本显示高度(从底部算起)
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/// </summary>
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[Description("文本显示高度(从底部算起)")]
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public int TextHeight
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{
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get { return textheight; }
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set
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{
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if (value > 5 && value <= 100)
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{
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textheight = value;
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}
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else { textheight = 20; }
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}
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}
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/// <summary>
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/// 默认图标
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/// </summary>
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[Description("默认图标")]
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public Image Icon { get; set; }
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/// <summary>
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/// 是否显示图标
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/// </summary>
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[Description("是否显示图标")]
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public bool IsDrawIcon { get; set; } = true;
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/// <summary>
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/// 是否显示网格线
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/// </summary>
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[Description("是否显示网格线")]
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public bool IsDrawGridLines { get; set; }
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/// <summary>
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/// 角标图标合集
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/// </summary>
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public List<Image> BadgeListImage { get; set; } = new List<Image>();
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/// <summary>
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/// 画项
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/// </summary>
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/// <param name="e"></param>
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protected override void OnDrawItem(DrawListViewItemEventArgs e)
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{
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Rectangle r = e.Bounds;
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Graphics g = e.Graphics;
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DrawSelectedBackground(e, g, r);
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int paddingHeight = 0;
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if (IsDrawIcon)
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{
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var soft = (Interface.IItemInfo)e.Item.Tag;
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if (soft == null || soft.Image == null)
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{ paddingHeight = this.DrawIcon(g, r, this.Icon, e.Item.BackColor,-1).Height; }
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else
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{
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paddingHeight = this.DrawIcon(g, r, soft.Image, e.Item.BackColor, soft.BadgeImageIndex).Height;
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}
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}
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//if (IsDrawGridLines)
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//{
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// using (Pen pen = new Pen(Color.Gray))
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// {
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// g.DrawRectangle(pen, r.X, r.Y, r.Width, r.Height + 1);//高度加1使横向线条重叠
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// }
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//}
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if (!string.IsNullOrEmpty(e.Item.Text))
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{
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this.DrawText(e, g, r, paddingHeight);
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}
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}
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private Color _SelectedStartBackColor = Color.FromArgb(255, 251, 237);
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/// <summary>
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/// 选择项的背景开始颜色
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/// </summary>
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[Description("选择项的背景开始颜色")]
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public Color SelectedStartBackColor
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{
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get
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{
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return _SelectedStartBackColor;
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}
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set
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{
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_SelectedStartBackColor = value;
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this.Refresh();
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}
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}
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private Color _SelectedEndBackColor = Color.FromArgb(255, 236, 181);
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/// <summary>
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/// 选择项的背景结束颜色
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/// </summary>
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[Description("选择项的背景结束颜色")]
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public Color SelectedEndBackColor
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{
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get
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{
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return _SelectedEndBackColor;
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}
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set
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{
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_SelectedEndBackColor = value;
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this.Refresh();
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}
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}
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private Color _SelectedBorderColor = Color.FromArgb(229, 195, 101);
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/// <summary>
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/// 选择项的边框颜色
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/// </summary>
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[Description("选择项的边框颜色")]
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public Color SelectedBorderColor
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{
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get
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{
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return _SelectedBorderColor;
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}
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set
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{
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_SelectedBorderColor = value;
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this.Refresh();
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}
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}
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private Color _SelectedForeColor = Color.Black;
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/// <summary>
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/// 选择项的字体颜色
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/// </summary>
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[Description("选择项的字体颜色")]
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public Color SelectedForeColor
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{
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get
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{
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return _SelectedForeColor;
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}
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set
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{
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_SelectedForeColor = value;
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this.Refresh();
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}
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}
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/// <summary>
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/// 重绘选中时背景
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/// </summary>
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private void DrawSelectedBackground(DrawListViewItemEventArgs e, Graphics g, Rectangle r)
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{
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if (e.Item.Selected)
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{
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//渐变画刷
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LinearGradientBrush brush = new LinearGradientBrush(e.Bounds, _SelectedStartBackColor,
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_SelectedEndBackColor, LinearGradientMode.Vertical);
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//填充区域
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//Rectangle borderRect = new Rectangle(r, e.Bounds.Y, e.Bounds.Width - 5, e.Bounds.Height - 2);
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e.Graphics.FillRectangle(brush, r);
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brush.Dispose();
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////画边框
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Pen pen = new Pen(_SelectedBorderColor);
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Rectangle borderRect = r;
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borderRect.Width--;
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borderRect.Height--;
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e.Graphics.DrawRectangle(pen, borderRect);
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pen.Dispose();
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//using (SolidBrush brush = new SolidBrush(_SelectedBackColor))
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//{
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// g.FillRectangle(brush, r);
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//}
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}
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}
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/// <summary>
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/// 重绘图标
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/// </summary>
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/// <param name="g"></param>
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/// <param name="r">区域大小</param>
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/// <param name="image"></param>
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/// <param name="backColor"></param>
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/// <returns></returns>
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private Size DrawIcon(Graphics g, Rectangle r, Image image, Color backColor,int BadgeImageIndex)
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{
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var x = r.X + ((r.Width - iconsize) / 2);
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var y = r.Y + ((r.Height - textheight - iconsize) / 2);
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Rectangle imageBounds = new Rectangle(new Point(x,y), new Size(iconsize, iconsize));
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if (image.Width > image.Height)
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{
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imageBounds.Height =(int)((image.Height/(double)image.Width)* imageBounds.Width);
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y += ((iconsize - imageBounds.Height) / 2);
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}
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else
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{
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x += ((iconsize - imageBounds.Width) / 2);
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imageBounds.Width = (int)((image.Width / (double)image.Height) * imageBounds.Height);
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}
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imageBounds.X = x;
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imageBounds.Y = y;
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//imageBounds.X = r.X + (r.Width - imageBounds.Width) / 2;
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//使图标不会紧贴着每一列的左上角
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//imageBounds.X += 1;
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//imageBounds.Y += 1;
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//如果有角标,则显示角标
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g.DrawImage(image, imageBounds);
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if (BadgeImageIndex >= 0 && BadgeImageIndex < BadgeListImage.Count)
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{
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var badge = BadgeListImage[BadgeImageIndex];
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if (badge != null)
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{
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var size = imageBounds.Width / 5;
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var badge_rect = new Rectangle(imageBounds.Left + size * 4, imageBounds.Top, size, size);
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g.DrawImage(badge, badge_rect);
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}
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}
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return imageBounds.Size;
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}
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/// <summary>
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/// 重绘文本
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/// </summary>
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private void DrawText(DrawListViewItemEventArgs e, Graphics g, Rectangle r, int paddingHeight)
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{
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TextFormatFlags flags = GetFormatFlags(HorizontalAlignment.Center);
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var r1 = new Rectangle(r.Location, r.Size)
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{
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Y = r.Y + r.Height- textheight,//重绘图标时，文本右移
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Height = textheight
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};
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TextRenderer.DrawText(
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g,
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e.Item.Text,
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e.Item.Font,
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r1,
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e.Item.Selected ? SelectedForeColor : e.Item.ForeColor,
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flags);
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}
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/// <summary>
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/// 获取文本对齐
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/// </summary>
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private TextFormatFlags GetFormatFlags(
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HorizontalAlignment align)
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{
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TextFormatFlags flags =
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TextFormatFlags.EndEllipsis |
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TextFormatFlags.VerticalCenter;
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switch (align)
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{
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case HorizontalAlignment.Center:
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flags |= TextFormatFlags.HorizontalCenter;
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break;
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case HorizontalAlignment.Right:
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flags |= TextFormatFlags.Right;
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break;
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case HorizontalAlignment.Left:
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flags |= TextFormatFlags.Left;
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break;
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}
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return flags;
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}
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const int WM_HSCROLL = 0x0114;
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const int WM_VSCROLL = 0x0115;
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/// <summary>
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/// 水平滚动条滚动事件
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/// </summary>
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[Description("水平滚动条滚动事件")]
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public event EventHandler HScroll;
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/// <summary>
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/// 垂直滚动条滚动事件
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/// </summary>
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[Description("垂直滚动条滚动事件")]
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public event EventHandler VScroll;
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/// <summary>
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///
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/// </summary>
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/// <param name="m"></param>
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protected override void WndProc(ref Message m)
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{
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if (m.Msg == WM_HSCROLL)
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{
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HScroll?.Invoke(this, new EventArgs());
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}
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else if (m.Msg == WM_VSCROLL)
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{
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VScroll?.Invoke(this, new EventArgs());
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}
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base.WndProc(ref m);
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}
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}
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} |