404 lines
11 KiB
C#
404 lines
11 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: UIDropControl.cs
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* 文件说明: 下拉框基类
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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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* 2020-07-05: V2.2.6 更新KeyDown、KeyUp、KeyPress事件。
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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.Drawing2D;
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using System.Runtime.InteropServices;
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using System.Windows.Forms;
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namespace Sunny.UI
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{
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public enum UIDropDownStyle
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{
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/// <summary>
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/// 通过单击下箭头指定显示列表，并指定文本部分可编辑。 这表示用户可以输入新的值，而不仅限于选择列表中现有的值。
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/// </summary>
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DropDown,
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/// <summary>
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/// 通过单击下箭头指定显示列表，并指定文本部分不可编辑。 这表示用户不能输入新的值。 只能选择列表中已有的值。
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/// </summary>
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DropDownList
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}
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[ToolboxItem(false)]
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public partial class UIDropControl : UIPanel
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{
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public UIDropControl()
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{
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InitializeComponent();
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edit.Font = UIFontColor.Font;
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edit.Left = 3;
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edit.Top = 3;
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edit.Text = String.Empty;
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edit.ForeColor = UIFontColor.Primary;
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edit.BorderStyle = BorderStyle.None;
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edit.TextChanged += EditTextChanged;
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edit.KeyDown += EditOnKeyDown;
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edit.KeyUp += EditOnKeyUp;
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edit.KeyPress += EditOnKeyPress;
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edit.LostFocus += Edit_LostFocus;
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edit.Invalidate();
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Controls.Add(edit);
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TextAlignment = ContentAlignment.MiddleLeft;
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fillColor = Color.White;
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edit.BackColor = Color.White;
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}
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private void Edit_LostFocus(object sender, EventArgs e)
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{
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EditorLostFocus?.Invoke(sender, e);
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}
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public event EventHandler EditorLostFocus;
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public new event KeyEventHandler KeyDown;
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public new event KeyEventHandler KeyUp;
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public new event KeyPressEventHandler KeyPress;
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[Browsable(true)]
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public new event EventHandler TextChanged;
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private void EditOnKeyPress(object sender, KeyPressEventArgs e)
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{
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KeyPress?.Invoke(sender, e);
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}
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public event EventHandler DoEnter;
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private void EditOnKeyDown(object sender, KeyEventArgs e)
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{
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if (e.KeyCode == Keys.Enter)
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{
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DoEnter?.Invoke(sender, e);
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}
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KeyDown?.Invoke(sender, e);
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}
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private void EditOnKeyUp(object sender, KeyEventArgs e)
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{
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KeyUp?.Invoke(sender, e);
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}
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[DefaultValue(null)]
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[Description("水印文字"), Category("SunnyUI")]
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public string Watermark
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{
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get => edit.Watermark;
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set => edit.Watermark = value;
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}
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private UIDropDown itemForm;
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protected UIDropDown ItemForm
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{
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get
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{
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if (itemForm == null)
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{
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CreateInstance();
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if (itemForm != null)
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{
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itemForm.ValueChanged += ItemForm_ValueChanged;
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itemForm.VisibleChanged += ItemForm_VisibleChanged;
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}
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}
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return itemForm;
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}
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set => itemForm = value;
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}
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private void ItemForm_VisibleChanged(object sender, EventArgs e)
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{
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dropSymbol = SymbolNormal;
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if (DroppedDown)
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{
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dropSymbol = SymbolDropDown;
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}
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Invalidate();
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}
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[Browsable(false), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
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public bool DroppedDown => itemForm != null && itemForm.Visible;
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private int symbolNormal = 61703;
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private int dropSymbol = 61703;
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[DefaultValue(61703)]
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[Description("正常显示时字体图标"), Category("SunnyUI")]
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public int SymbolNormal
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{
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get => symbolNormal;
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set
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{
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symbolNormal = value;
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dropSymbol = value;
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}
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}
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[DefaultValue(61702)]
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[Description("下拉框显示时字体图标"), Category("SunnyUI")]
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public int SymbolDropDown { get; set; } = 61702;
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protected virtual void CreateInstance()
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{
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}
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protected virtual void ItemForm_ValueChanged(object sender, object value)
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{
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}
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protected virtual int CalcItemFormHeight()
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{
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return 200;
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}
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private UIDropDownStyle _dropDownStyle = UIDropDownStyle.DropDown;
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[DefaultValue(UIDropDownStyle.DropDown)]
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[Description("下拉框显示样式"), Category("SunnyUI")]
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public UIDropDownStyle DropDownStyle
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{
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get => _dropDownStyle;
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set
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{
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if (_dropDownStyle != value)
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{
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_dropDownStyle = value;
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edit.Visible = value == UIDropDownStyle.DropDown;
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Invalidate();
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}
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}
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}
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public event EventHandler ButtonClick;
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protected readonly TextBoxEx edit = new TextBoxEx();
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protected override void OnTextChanged(EventArgs e)
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{
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base.OnTextChanged(e);
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edit.Text = Text;
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Invalidate();
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}
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private void EditTextChanged(object s, EventArgs e)
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{
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Text = edit.Text;
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TextChanged?.Invoke(s, e);
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Invalidate();
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}
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protected override void OnFontChanged(EventArgs e)
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{
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base.OnFontChanged(e);
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edit.Font = Font;
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Invalidate();
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}
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protected override void OnSizeChanged(EventArgs e)
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{
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SizeChange();
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}
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private void SizeChange()
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{
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TextBox edt = new TextBox();
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edt.Font = edit.Font;
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edt.Invalidate();
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Height = edt.Height;
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edt.Dispose();
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edit.Top = (Height - edit.Height) / 2;
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edit.Left = 3;
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edit.Width = Width - 30;
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}
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protected override void OnPaintFore(Graphics g, GraphicsPath path)
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{
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SizeChange();
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if (!edit.Visible)
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{
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base.OnPaintFore(g, path);
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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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Padding = new Padding(0, 0, 30, 0);
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e.Graphics.FillRoundRectangle(GetFillColor(), new Rectangle(Width - 27, edit.Top, 25, edit.Height), Radius);
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Color color = GetRectColor();
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SizeF sf = e.Graphics.GetFontImageSize(dropSymbol, 24);
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e.Graphics.DrawFontImage(dropSymbol, 24, color, Width - 28 + (12 - sf.Width / 2.0f), (Height - sf.Height) / 2.0f);
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}
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protected override void OnGotFocus(EventArgs e)
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{
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base.OnGotFocus(e);
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edit.Focus();
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}
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public void Clear()
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{
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edit.Clear();
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}
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[DefaultValue('\0')]
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[Description("m"), Category("SunnyUI")]
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public char PasswordChar
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{
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get => edit.PasswordChar;
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set => edit.PasswordChar = value;
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}
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[DefaultValue(false)]
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public bool ReadOnly
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{
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get => edit.ReadOnly;
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set
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{
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edit.ReadOnly = value;
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edit.BackColor = Color.White;
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}
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}
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[CategoryAttribute("文字"), Browsable(true)]
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[DefaultValue("")]
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public override string Text
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{
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get => edit.Text;
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set => edit.Text = value;
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}
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public bool IsEmpty => edit.Text == "";
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protected override void OnMouseDown(MouseEventArgs e)
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{
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ActiveControl = edit;
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}
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[DefaultValue(32767)]
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public int MaxLength
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{
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get => edit.MaxLength;
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set => edit.MaxLength = Math.Max(value, 1);
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}
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[Browsable(false), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
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public int SelectionLength
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{
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get => edit.SelectionLength;
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set => edit.SelectionLength = value;
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}
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[Browsable(false), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
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public int SelectionStart
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{
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get => edit.SelectionStart;
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set => edit.SelectionStart = 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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foreColor = uiColor.DropDownControlColor;
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edit.BackColor = fillColor = Color.White;
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Invalidate();
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}
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protected override void AfterSetFillColor(Color color)
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{
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base.AfterSetFillColor(color);
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edit.BackColor = fillColor;
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}
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protected override void AfterSetForeColor(Color color)
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{
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base.AfterSetForeColor(color);
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edit.ForeColor = foreColor;
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}
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protected override void OnClick(EventArgs e)
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{
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if (!ReadOnly)
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{
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if (ItemForm != null)
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{
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ItemForm.SetRectColor(rectColor);
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ItemForm.SetFillColor(fillColor);
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ItemForm.SetForeColor(foreColor);
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ItemForm.SetStyle(UIStyles.ActiveStyleColor);
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}
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ButtonClick?.Invoke(this, e);
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}
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}
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//public event EventHandler DropDown;
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//public event EventHandler DropDownClosed;
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public void Select(int start, int length)
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{
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edit.Select(start, length);
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}
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public void SelectAll()
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{
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edit.SelectAll();
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}
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protected class TextBoxEx : TextBox
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{
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private string watermark;
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[DllImport("user32.dll", CharSet = CharSet.Auto)]
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private static extern IntPtr SendMessage(IntPtr hWnd, int msg, int wParam, string lParam);
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[DefaultValue(null)]
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public string Watermark
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{
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get => watermark;
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set
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{
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watermark = value;
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SendMessage(Handle, 0x1501, (int)IntPtr.Zero, value);
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}
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}
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}
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}
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} |