8b41f58f5c
------ #### ryControlsV4 V3.0.2107.0101 - *.[新增]新增Sheng.Winform.Controls部分控件。 #### RyWeb V3.0.2107.0101 - *.[新增]QuickWeb新增引用页设置。 #### MyDbV4 V3.0.2107.0101 - *.[新增]支持忽略大小写的替换功能。
115 lines
3.8 KiB
C#
115 lines
3.8 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Drawing;
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namespace Sheng.Winform.Controls
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{
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/// <summary>
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/// 为项绘制带有描述信息的渲染器
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/// </summary>
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public class ShengListViewDescriptiveRenderer : ShengListViewRenderer
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{
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#region 私有成员
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/// <summary>
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/// 字的高度是否已初始化
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/// 在第一次绘制时，测量文本的高度
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/// </summary>
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bool _headerHeightInited = false;
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int _headerHeight;
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Font _headerFont;
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Size _itemPadding = new Size(8, 4);
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StringFormat _itemHeaderStringFormat = new StringFormat();
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#endregion
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#region 构造
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public ShengListViewDescriptiveRenderer(ShengListViewLayoutManager layoutManager)
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: base(layoutManager)
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{
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layoutManager.ItemHeight = 40;
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//_itemHeaderStringFormat.Alignment = StringAlignment.Center;
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_itemHeaderStringFormat.FormatFlags = StringFormatFlags.LineLimit | StringFormatFlags.NoWrap;
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}
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#endregion
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#region 受保护的方法
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internal override void DrawForeground(Graphics g)
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{
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}
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internal override void DrawItemContent(Graphics g, Rectangle bounds, ShengListViewItem item)
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{
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string header = LayoutManager.GetItemText(item.Value);
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//如果header为空则不南要绘制内容了
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if (String.IsNullOrEmpty(header))
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return;
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string description = null;
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if (LayoutManager.ContainerExtendMember(ShengListViewDescriptiveMembers.DescriptioinMember))
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{
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description = LayoutManager.GetItemText(item.Value,
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LayoutManager.GetExtendMember(ShengListViewDescriptiveMembers.DescriptioinMember));
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}
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if (_headerHeightInited == false)
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{
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_headerFont = new Font(Theme.ItemHeaderFont, FontStyle.Bold);
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SizeF headerSize = g.MeasureString(header, _headerFont);
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_headerHeight = (int)Math.Ceiling(headerSize.Height);
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_headerHeightInited = true;
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}
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#region 绘制文本
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Rectangle _headerBounds = new Rectangle();
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_headerBounds.X = _itemPadding.Width;
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_headerBounds.Y = _itemPadding.Height;//LayoutManager.ItemSize - _headerHeight - _itemPadding.Height;
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_headerBounds.Width = bounds.Width;
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_headerBounds.Height = _headerHeight;
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Rectangle _descriptionBounds = new Rectangle();
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_descriptionBounds.X = _itemPadding.Width;
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_descriptionBounds.Y = _headerBounds.Y + _headerBounds.Height + _itemPadding.Height;
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_descriptionBounds.Width = bounds.Width;
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_descriptionBounds.Height = _headerHeight;
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//注意，offset必须在最后，如果先offset了_headerBounds，再带入_headerBounds来计算_descriptionBounds
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//就不对了
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_headerBounds.Offset(bounds.Location);
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_descriptionBounds.Offset(bounds.Location);
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if (String.IsNullOrEmpty(header) == false)
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{
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using (SolidBrush brush = new SolidBrush(Theme.ItemHeaderColor))
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{
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g.DrawString(header, _headerFont, brush, _headerBounds, _itemHeaderStringFormat);
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}
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}
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if (String.IsNullOrEmpty(description) == false)
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{
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using (SolidBrush brush = new SolidBrush(Theme.ItemDescriptioniColor))
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{
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g.DrawString(description, Theme.ItemHeaderFont, brush, _descriptionBounds, _itemHeaderStringFormat);
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}
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}
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#endregion
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}
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#endregion
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}
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}
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