350 lines
9.7 KiB
C#
350 lines
9.7 KiB
C#
/******************************************************************************
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* SunnyUI 开源控件库、工具类库、扩展类库、多页面开发框架。
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* CopyRight (C) 2012-2022 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: UIDropDown.cs
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* 文件说明: 下拉框弹出窗体控制类
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* 当前版本: V3.0
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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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******************************************************************************/
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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.Windows.Forms;
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namespace Sunny.UI
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{
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/// <summary>
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/// 下拉框弹出窗体控制类
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/// </summary>
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[ToolboxItem(false)]
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public sealed class UIDropDown : ToolStripDropDown
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{
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private IContainer components;
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/// <summary>
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/// 析构函数
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/// </summary>
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/// <param name="disposing">disposing</param>
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protected override void Dispose(bool disposing)
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{
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if (disposing)
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{
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components?.Dispose();
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if (Item != null)
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{
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UIDropDownItem _content = Item;
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Item = null;
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_content.Dispose();
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}
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}
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base.Dispose(disposing);
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}
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private void InitializeComponent()
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{
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components = new Container();
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}
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private UIDropDownItem Item;
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private Control OpenItem;
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/// <summary>
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/// 数值切换事件
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/// </summary>
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/// <param name="sender">sender</param>
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/// <param name="value">数值</param>
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public delegate void OnValueChanged(object sender, object value);
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/// <summary>
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/// 数值切换事件
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/// </summary>
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public event OnValueChanged ValueChanged;
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private void DoValueChanged(object sender, object value)
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{
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ValueChanged?.Invoke(this, value);
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}
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/// <summary>
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/// 构造函数
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/// </summary>
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/// <param name="item">下拉框弹出窗体基类</param>
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public UIDropDown(UIDropDownItem item)
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{
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Item = item ?? throw new ArgumentNullException(nameof(item));
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Item.ValueChanged += DoValueChanged;
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InitializeComponent();
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AutoSize = false;
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DoubleBuffered = true;
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//ResizeRedraw = true;
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ToolStripControlHost _host = new ToolStripControlHost(item);
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Padding = Margin = _host.Padding = _host.Margin = Padding.Empty;
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item.MinimumSize = item.Size;
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item.MaximumSize = item.Size;
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Size = item.Size;
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TabStop = item.TabStop = true;
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item.Location = Point.Empty;
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Items.Add(_host);
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item.Disposed += (sender, e) =>
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{
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item = null;
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Dispose(true);
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};
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item.RegionChanged += (sender, e) => UpdateRegion();
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UpdateRegion();
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}
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private void UpdateRegion()
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{
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if (Region != null)
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{
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Region.Dispose();
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Region = null;
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}
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if (Item.Region != null)
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{
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Region = Item.Region.Clone();
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}
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}
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/// <summary>
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/// 显示
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/// </summary>
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/// <param name="control">Control</param>
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public void Show(Control control)
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{
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if (control == null)
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{
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throw new ArgumentNullException(nameof(control));
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}
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Show(control, control.ClientRectangle, new Point(0, 0));
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}
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/// <summary>
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/// 显示
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/// </summary>
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/// <param name="control">Control</param>
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/// <param name="size">大小</param>
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public void Show(Control control, Size size, Point offset)
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{
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if (control == null)
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{
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throw new ArgumentNullException(nameof(control));
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}
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Size = size;
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Show(control, control.ClientRectangle, offset);
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}
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/// <summary>
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/// 显示
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/// </summary>
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/// <param name="control">Control</param>
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/// <param name="size">大小</param>
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public void Show(Control control, Size size)
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{
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Size = size;
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Show(control);
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}
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/// <summary>
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/// 显示
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/// </summary>
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/// <param name="area">区域</param>
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public void Show(Rectangle area)
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{
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Point location = new Point(area.Left, area.Top + area.Height);
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Rectangle screen = Screen.FromControl(this).WorkingArea;
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if (location.X + Size.Width > (screen.Left + screen.Width))
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{
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location.X = (screen.Left + screen.Width) - Size.Width;
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}
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if (location.Y + Size.Height > (screen.Top + screen.Height))
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{
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location.Y -= Size.Height + area.Height;
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}
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Show(location, ToolStripDropDownDirection.BelowRight);
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}
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/// <summary>
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/// 显示
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/// </summary>
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/// <param name="control">Control</param>
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/// <param name="area">区域</param>
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public void Show(Control control, Rectangle area, Point offset)
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{
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if (control == null)
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{
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throw new ArgumentNullException(nameof(control));
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}
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SetOwnerItem(control);
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Point location = control.PointToScreen(new Point(area.Left, area.Top + area.Height));
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Rectangle screen = Screen.FromControl(control).WorkingArea;
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location.X += offset.X;
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location.Y += offset.Y;
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if (location.X + Size.Width > (screen.Left + screen.Width))
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{
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location.X = (screen.Left + screen.Width) - Size.Width;
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}
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if (location.Y + Size.Height > (screen.Top + screen.Height))
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{
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location.Y -= Size.Height + area.Height;
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}
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location = control.PointToClient(location);
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Show(control, location, ToolStripDropDownDirection.BelowRight);
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}
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private void SetOwnerItem(Control control)
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{
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if (control == null)
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{
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return;
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}
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if (control is UIDropDown ctrl)
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{
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OwnerItem = ctrl.Items[0];
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return;
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}
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else if (OpenItem == null)
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{
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OpenItem = control;
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}
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if (control.Parent != null)
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{
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SetOwnerItem(control.Parent);
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}
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}
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/// <summary>
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/// OnSizeChanged
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/// </summary>
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/// <param name="e">e</param>
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protected override void OnSizeChanged(EventArgs e)
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{
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if (Item != null)
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{
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Item.MinimumSize = Size;
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Item.MaximumSize = Size;
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Item.Size = Size;
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Item.Location = Point.Empty;
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}
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base.OnSizeChanged(e);
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}
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/// <summary>
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/// OnLayout
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/// </summary>
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/// <param name="e">e</param>
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protected override void OnLayout(LayoutEventArgs e)
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{
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Size suggestedSize = GetPreferredSize(Size.Empty);
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if (AutoSize && suggestedSize != Size)
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{
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Size = suggestedSize;
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}
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SetDisplayedItems();
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OnLayoutCompleted(EventArgs.Empty);
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Invalidate();
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}
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/// <summary>
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/// OnOpening
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/// </summary>
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/// <param name="e">e</param>
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protected override void OnOpening(CancelEventArgs e)
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{
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if (Item.IsDisposed || Item.Disposing)
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{
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e.Cancel = true;
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return;
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}
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UpdateRegion();
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base.OnOpening(e);
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}
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/// <summary>
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/// OnOpened
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/// </summary>
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/// <param name="e">e</param>
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protected override void OnOpened(EventArgs e)
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{
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Item.Focus();
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Item.InitShow();
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base.OnOpened(e);
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}
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/// <summary>
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/// OnClosed
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/// </summary>
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/// <param name="e">e</param>
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protected override void OnClosed(ToolStripDropDownClosedEventArgs e)
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{
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OpenItem = null;
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base.OnClosed(e);
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}
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/// <summary>
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/// 设置边框颜色
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/// </summary>
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/// <param name="color">颜色</param>
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public void SetRectColor(Color color)
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{
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Item?.SetRectColor(color);
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}
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/// <summary>
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/// 设置填充颜色
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/// </summary>
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/// <param name="color">颜色</param>
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public void SetFillColor(Color color)
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{
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Item?.SetFillColor(color);
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}
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/// <summary>
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/// 设置字体颜色
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/// </summary>
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/// <param name="color">颜色</param>
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public void SetForeColor(Color color)
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{
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Item?.SetForeColor(color);
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}
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public void SetStyle(UIBaseStyle style)
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{
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Item?.SetStyle(style);
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}
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}
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} |