544 lines
16 KiB
C#
544 lines
16 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) 2012-2020 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: UIListBox.cs
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* 文件说明: 列表框
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* 当前版本: V2.2
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* 创建日期: 2020-01-01
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*
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* 2020-01-01: V2.2.0 增加文件说明
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* 2020-04-25: V2.2.4 更新主题配置类
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* 2020-05-21: V2.2.5 增加鼠标滑过高亮
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* 开发日志：https://www.cnblogs.com/yhuse/p/12933885.html
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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.Design;
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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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[DefaultEvent("ItemClick")]
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[DefaultProperty("Items")]
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public sealed partial class UIListBox : UIPanel
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{
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private readonly ListBoxEx listbox = new ListBoxEx();
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private readonly UIScrollBar bar = new UIScrollBar();
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public UIListBox()
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{
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InitializeComponent();
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ShowText = false;
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Padding = new Padding(2);
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bar.ValueChanged += Bar_ValueChanged;
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bar.Width = SystemInformation.VerticalScrollBarWidth + 2;
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bar.Parent = this;
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bar.Dock = DockStyle.None;
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bar.Style = UIStyle.Custom;
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bar.Visible = false;
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listbox.Parent = this;
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listbox.Dock = DockStyle.Fill;
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listbox.Show();
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listbox.Bar = bar;
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listbox.SelectedIndexChanged += Listbox_SelectedIndexChanged;
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listbox.SelectedValueChanged += Listbox_SelectedValueChanged;
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listbox.Click += Listbox_Click;
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listbox.DoubleClick += Listbox_DoubleClick;
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listbox.BeforeDrawItem += Listbox_BeforeDrawItem;
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}
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protected override void OnSizeChanged(EventArgs e)
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{
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base.OnSizeChanged(e);
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bar.Top = 2;
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bar.Height = Height - 4;
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bar.Left = Width - bar.Width - 2;
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}
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private void Listbox_BeforeDrawItem(object sender, ListBox.ObjectCollection items, DrawItemEventArgs e)
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{
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if (Items.Count != LastCount)
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{
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listbox.SetScrollInfo();
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LastCount = Items.Count;
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ItemsCountChange?.Invoke(this, null);
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}
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}
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private void Listbox_DoubleClick(object sender, EventArgs e)
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{
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if (SelectedItem != null)
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ItemDoubleClick?.Invoke(sender, e);
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}
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private void Listbox_Click(object sender, EventArgs e)
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{
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if (SelectedItem != null)
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ItemClick?.Invoke(sender, e);
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}
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public event EventHandler ItemClick;
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public event EventHandler ItemDoubleClick;
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public event EventHandler ItemsCountChange;
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public event EventHandler SelectedIndexChanged;
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public event EventHandler SelectedValueChanged;
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private void Listbox_SelectedValueChanged(object sender, EventArgs e)
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{
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SelectedValueChanged?.Invoke(sender, e);
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Text = listbox.SelectedItem?.ToString();
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}
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private void Listbox_SelectedIndexChanged(object sender, EventArgs e)
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{
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SelectedIndexChanged?.Invoke(sender, e);
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}
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[DefaultValue(25)]
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public int ItemHeight
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{
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get => listbox.ItemHeight;
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set => listbox.ItemHeight = value;
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}
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public override void SetStyleColor(UIBaseStyle uiColor)
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{
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base.SetStyleColor(uiColor);
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if (uiColor.IsCustom()) return;
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if (bar != null)
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{
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bar.ForeColor = uiColor.PrimaryColor;
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bar.HoverColor = uiColor.ButtonFillHoverColor;
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bar.PressColor = uiColor.ButtonFillPressColor;
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bar.FillColor = Color.White;
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}
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hoverColor = uiColor.TreeViewHoverColor;
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if (listbox != null)
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{
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listbox.HoverColor = hoverColor;
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listbox.SetStyleColor(uiColor);
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}
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}
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private int LastCount;
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private void Bar_ValueChanged(object sender, EventArgs e)
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{
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if (listbox != null)
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{
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ScrollBarInfo.SetScrollValue(listbox.Handle, bar.Value);
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}
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}
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protected override void OnRadiusChanged(int value)
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{
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base.OnRadiusChanged(value);
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Padding = new Padding(Math.Max(2, value / 2));
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}
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protected override void OnPaintFill(Graphics g, GraphicsPath path)
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{
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g.Clear(Color.White);
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}
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[DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
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[Localizable(true)]
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[Editor("System.Windows.Forms.Design.ListControlStringCollectionEditor, System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", typeof(UITypeEditor))]
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[MergableProperty(false)]
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public ListBox.ObjectCollection Items => listbox.Items;
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[Browsable(false)]
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public int Count => Items.Count;
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public void SelectedFirst()
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{
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listbox.SelectedFirst();
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}
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[DefaultValue(typeof(Color), "80, 160, 255")]
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public Color ItemSelectBackColor
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{
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get => listbox.ItemSelectBackColor;
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set => listbox.ItemSelectBackColor = value;
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}
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[DefaultValue(typeof(Color), "White")]
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public Color ItemSelectForeColor
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{
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get => listbox.ItemSelectForeColor;
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set => listbox.ItemSelectForeColor = value;
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}
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[Browsable(false)]
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[DefaultValue(-1)]
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public int SelectedIndex
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{
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get => listbox.SelectedIndex;
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set => listbox.SelectedIndex = value;
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}
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[Browsable(false)]
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[DefaultValue(null)]
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public object SelectedItem
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{
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get => listbox.SelectedItem;
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set => listbox.SelectedItem = value;
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}
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[Browsable(false)]
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[DefaultValue(null)]
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public object SelectedValue
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{
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get => listbox.SelectedValue;
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set => listbox.SelectedValue = value;
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}
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private Color hoverColor = Color.FromArgb(155, 200, 255);
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[DefaultValue(typeof(Color), "155, 200, 255")]
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public Color HoverColor
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{
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get => hoverColor;
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set
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{
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hoverColor = value;
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listbox.HoverColor = hoverColor;
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_style = UIStyle.Custom;
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}
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}
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}
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/// <summary>
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/// ListBox
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/// </summary>
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[ToolboxItem(false)]
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public sealed class ListBoxEx : ListBox, IStyleInterface
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{
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private UIScrollBar bar;
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[DefaultValue(null)]
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public string TagString { get; set; }
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public UIScrollBar Bar
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{
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get => bar;
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set
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{
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bar = value;
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SetScrollInfo();
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}
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}
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public int Count => Items.Count;
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public ListBoxEx()
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{
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InitializeComponent();
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SetStyle(ControlStyles.AllPaintingInWmPaint, true);
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SetStyle(ControlStyles.DoubleBuffer, true);
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UpdateStyles();
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this.DoubleBuffered();
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BorderStyle = BorderStyle.None;
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ForeColor = UIFontColor.Primary;
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IntegralHeight = false;
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Version = UIGlobal.Version;
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SetScrollInfo();
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}
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protected override void OnSizeChanged(EventArgs e)
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{
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SetScrollInfo();
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}
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public void SetScrollInfo()
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{
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if (Bar == null)
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{
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return;
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}
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var si = ScrollBarInfo.GetInfo(Handle);
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if (si.ScrollMax > 0)
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{
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Bar.Maximum = si.ScrollMax;
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Bar.Visible = si.ScrollMax > 0 && si.nMax > 0 && si.nPage > 0;
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Bar.Value = si.nPos;
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}
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else
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{
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Bar.Visible = false;
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}
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}
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public string Version { get; }
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[DefaultValue(false)]
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public bool StyleCustomMode { get; set; }
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#region 组件设计器生成的代码
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/// <summary>
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/// 设计器支持所需的方法 - 不要
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/// 使用代码编辑器修改此方法的内容。
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/// </summary>
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private void InitializeComponent()
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{
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SuspendLayout();
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//
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// UIListBox
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//
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BorderStyle = BorderStyle.FixedSingle;
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DrawMode = DrawMode.OwnerDrawFixed;
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Font = UIFontColor.Font;
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IntegralHeight = false;
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ItemHeight = 25;
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Size = new Size(150, 200);
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ResumeLayout(false);
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}
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#endregion 组件设计器生成的代码
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private UIStyle _style = UIStyle.Blue;
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private Color _itemSelectBackColor = UIColor.Blue;
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private Color _itemSelectForeColor = Color.White;
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[DefaultValue(UIStyle.Blue)]
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public UIStyle Style
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{
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get => _style;
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set => SetStyle(value);
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}
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// protected override void WndProc(ref Message m)
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// {
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// base.WndProc(ref m);
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// //隐藏滚动条
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// ScrollBarInfo.ShowScrollBar(Handle, 3, false);//0:horizontal,1:vertical,3:both
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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 (Bar.Visible)
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{
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var si = ScrollBarInfo.GetInfo(Handle);
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if (e.Delta > 10)
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{
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if (si.nPos > 0)
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{
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ScrollBarInfo.ScrollUp(Handle);
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}
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}
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else if (e.Delta < -10)
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{
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if (si.nPos < si.ScrollMax)
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{
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ScrollBarInfo.ScrollDown(Handle);
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}
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}
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}
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SetScrollInfo();
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}
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public void SetStyle(UIStyle style)
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{
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SetStyleColor(UIStyles.GetStyleColor(style));
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_style = style;
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}
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public void SetStyleColor(UIBaseStyle uiColor)
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{
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if (uiColor.IsCustom()) return;
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ItemSelectBackColor = uiColor.ListItemSelectBackColor;
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ItemSelectForeColor = uiColor.ListItemSelectForeColor;
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Invalidate();
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}
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[Category("Appearance"), Description("The border color used to paint the control.")]
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public Color ItemSelectBackColor
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{
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get => _itemSelectBackColor;
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set
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{
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if (_itemSelectBackColor != value)
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{
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_itemSelectBackColor = value;
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_style = UIStyle.Custom;
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if (DesignMode)
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Invalidate();
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}
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}
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}
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[Category("Appearance"), Description("The border color used to paint the control.")]
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public Color ItemSelectForeColor
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{
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get => _itemSelectForeColor;
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set
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{
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if (_itemSelectForeColor != value)
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{
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_itemSelectForeColor = value;
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_style = UIStyle.Custom;
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if (DesignMode)
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Invalidate();
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}
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}
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}
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public delegate void OnBeforeDrawItem(object sender, ObjectCollection items, DrawItemEventArgs e);
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public event OnBeforeDrawItem BeforeDrawItem;
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public event OnBeforeDrawItem AfterDrawItem;
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protected override void OnDrawItem(DrawItemEventArgs e)
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{
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base.OnDrawItem(e);
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BeforeDrawItem?.Invoke(this, Items, e);
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if (Items.Count == 0)
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{
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return;
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}
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bool otherState = e.State == DrawItemState.Grayed || e.State == DrawItemState.HotLight;
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if (!otherState)
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{
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e.DrawBackground();
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}
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if (e.Index < 0 || e.Index >= Items.Count)
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{
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return;
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}
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StringFormat sStringFormat = new StringFormat();
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sStringFormat.LineAlignment = StringAlignment.Center;
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bool isSelected = (e.State & DrawItemState.Selected) == DrawItemState.Selected;
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Color backColor = isSelected ? ItemSelectBackColor : BackColor;
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Color foreColor = isSelected ? ItemSelectForeColor : ForeColor;
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Rectangle rect = new Rectangle(e.Bounds.X, e.Bounds.Y, e.Bounds.Width - 1, e.Bounds.Height - 1);
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if (!otherState)
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{
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e.Graphics.FillRectangle(BackColor, e.Bounds);
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e.Graphics.FillRoundRectangle(backColor, rect, 5);
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e.Graphics.DrawString(Items[e.Index].ToString(), e.Font, foreColor, e.Bounds, sStringFormat);
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}
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else
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{
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if (e.State == DrawItemState.Grayed)
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{
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backColor = BackColor;
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foreColor = ForeColor;
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}
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if (e.State == DrawItemState.HotLight)
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{
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backColor = HoverColor;
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foreColor = ForeColor;
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}
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e.Graphics.FillRectangle(BackColor, e.Bounds);
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e.Graphics.FillRoundRectangle(backColor, rect, 5);
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e.Graphics.DrawString(Items[e.Index].ToString(), e.Font, foreColor, e.Bounds, sStringFormat);
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}
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AfterDrawItem?.Invoke(this, Items, e);
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}
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private Color hoverColor = Color.FromArgb(155, 200, 255);
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[DefaultValue(typeof(Color), "155, 200, 255")]
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public Color HoverColor
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{
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get => hoverColor;
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set
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{
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hoverColor = value;
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_style = UIStyle.Custom;
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}
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}
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protected override void OnMeasureItem(MeasureItemEventArgs e)
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{
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base.OnMeasureItem(e);
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e.ItemHeight = e.ItemHeight + ItemHeight;
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}
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public void SelectedFirst()
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{
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if (Items.Count > 0 && SelectedIndex < 0)
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{
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SelectedIndex = 0;
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}
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}
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private int lastIndex = -1;
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private int mouseIndex = -1;
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[Browsable(false)]
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public int MouseIndex
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{
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get => mouseIndex;
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set
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{
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if (mouseIndex != value)
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{
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if (lastIndex >= 0 && lastIndex >= 0 && lastIndex < Items.Count && lastIndex != SelectedIndex)
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{
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OnDrawItem(new DrawItemEventArgs(CreateGraphics(), Font, GetItemRectangle(lastIndex), lastIndex, DrawItemState.Grayed));
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}
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mouseIndex = value;
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if (mouseIndex >= 0 && mouseIndex >= 0 && mouseIndex < Items.Count && mouseIndex != SelectedIndex)
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{
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OnDrawItem(new DrawItemEventArgs(CreateGraphics(), Font, GetItemRectangle(value), value, DrawItemState.HotLight));
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}
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lastIndex = mouseIndex;
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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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MouseIndex = IndexFromPoint(e.Location);
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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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MouseIndex = -1;
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}
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}
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} |