mirror of https://github.com/dahall/Vanara.git
Cleaned, reorg'd and added docs
David Hall
parent
a862eb740b
commit
2e4d6b9c3c
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@ -5,33 +5,49 @@ using System.Windows.Forms;
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namespace Vanara.Windows.Forms
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{
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/// <summary>
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/// A combo box that displays the items of an <see cref="Enum"/> type. If the Enum type has a <see cref="FlagsAttribute"/>, then the
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/// drop-down will be checked list of the values.
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/// </summary>
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/// <seealso cref="CustomComboBox"/>
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public class EnumComboBox : CustomComboBox
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{
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private Type type = typeof(DayOfWeek);
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private List<ECBItem> items = new List<ECBItem>();
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private readonly List<ECBItem> items = new List<ECBItem>();
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private readonly Timer timer = new Timer { Interval = 150 };
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private CheckedListBox checkListBox;
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private Timer timer = new Timer { Interval = 150 };
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private Type type = null;
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/// <summary>Initializes a new instance of the <see cref="EnumComboBox"/> class.</summary>
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public EnumComboBox() : base()
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{
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base.DropDownStyle = ComboBoxStyle.DropDownList;
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timer.Tick += Timer_Tick;
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}
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private void Timer_Tick(object sender, EventArgs e)
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{
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timer.Enabled = false;
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if (HasFlags)
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Text = GetFlagText();
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}
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/// <summary>Gets or sets the data source for this <see cref="T:System.Windows.Forms.ComboBox"/>.</summary>
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[Browsable(false), EditorBrowsable(EditorBrowsableState.Never), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
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public new object DataSource { get => base.DataSource; set => base.DataSource = value; }
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[DefaultValue("System.DayOfWeek")]
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/// <summary>Gets or sets the property to display for this <see cref="T:System.Windows.Forms.ListControl"/>.</summary>
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[Browsable(false), EditorBrowsable(EditorBrowsableState.Never), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
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public new string DisplayMember { get => base.DisplayMember; set => base.DisplayMember = value; }
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/// <summary>Gets or sets a value specifying the style of the combo box.</summary>
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/// <PermissionSet><IPermission class="System.Security.Permissions.EnvironmentPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true"/><IPermission class="System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true"/><IPermission class="System.Security.Permissions.SecurityPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Flags="UnmanagedCode, ControlEvidence"/><IPermission class="System.Diagnostics.PerformanceCounterPermission, System, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true"/></PermissionSet>
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[Browsable(false), EditorBrowsable(EditorBrowsableState.Never), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
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public new ComboBoxStyle DropDownStyle { get => base.DropDownStyle; set => base.DropDownStyle = value; }
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/// <summary>Gets or sets the Enum type that is used to populate the values of the combo box.</summary>
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/// <value>The enum type string.</value>
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/// <exception cref="ArgumentException">EnumTypeString must be an enumerated type.</exception>
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[DefaultValue(""), Description("The Enum type that is used to populate the values of the combo box.")]
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public string EnumTypeString
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{
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get => type.FullName; set
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get => type?.FullName ?? "";
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set
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{
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type = FindType(null, value, true);
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if (type == null || !type.IsEnum)
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type = FindType(value, true);
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if (type is null || !type.IsEnum)
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throw new ArgumentException("EnumTypeString must be an enumerated type.");
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items.Clear();
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@ -42,9 +58,9 @@ namespace Vanara.Windows.Forms
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{
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if (checkListBox == null)
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{
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checkListBox = new System.Windows.Forms.CheckedListBox()
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checkListBox = new CheckedListBox()
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{
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BorderStyle = System.Windows.Forms.BorderStyle.None,
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BorderStyle = BorderStyle.None,
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CheckOnClick = true,
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FormattingEnabled = true,
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Location = new System.Drawing.Point(17, 35),
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@ -69,59 +85,23 @@ namespace Vanara.Windows.Forms
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}
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}
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private void CheckListBox_ItemCheck(object sender, ItemCheckEventArgs e)
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{
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timer.Enabled = true;
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}
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private string GetFlagText()
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{
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string[] items = new string[checkListBox.CheckedItems.Count];
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for (int i = 0; i < checkListBox.CheckedItems.Count; i++)
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items[i] = checkListBox.CheckedItems[i].ToString();
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return string.Join(", ", items);
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}
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private Type FindType(global::System.Reflection.Assembly asm, string name, bool ignoreCase)
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{
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Type t = null;
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foreach (var a in AppDomain.CurrentDomain.GetAssemblies())
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if ((t = a.GetType(name, false, ignoreCase)) != null)
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break;
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return t;
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}
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public T GetSelectedValue<T>() => SelectedValue == null ? default : (T)SelectedValue;
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[Browsable(false), EditorBrowsable(EditorBrowsableState.Never), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
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public new ComboBoxStyle DropDownStyle { get => base.DropDownStyle; set => base.DropDownStyle = value; }
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[Browsable(false), EditorBrowsable(EditorBrowsableState.Never), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
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public new string DisplayMember { get => base.DisplayMember; set => base.DisplayMember = value; }
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[Browsable(false), EditorBrowsable(EditorBrowsableState.Never), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
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public new string ValueMember { get => base.ValueMember; set => base.ValueMember = value; }
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[Browsable(false), EditorBrowsable(EditorBrowsableState.Never), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
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public new object DataSource { get => base.DataSource; set => base.DataSource = value; }
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[Browsable(false), EditorBrowsable(EditorBrowsableState.Never), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
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public new ObjectCollection Items => base.Items;
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/// <summary>
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/// Gets or sets the value of the member property specified by the <see cref="P:System.Windows.Forms.ListControl.ValueMember"/> property.
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/// </summary>
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public new object SelectedValue
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{
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get
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{
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long ret = 0;
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var ret = 0L;
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if (!HasFlags)
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{
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ret = Convert.ToInt64(items[SelectedIndex].Value);
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}
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else
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{
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for (int i = 0; i < checkListBox.CheckedItems.Count; i++)
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for (var i = 0; i < checkListBox.CheckedItems.Count; i++)
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{
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ECBItem o = checkListBox.CheckedItems[i] as ECBItem;
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var o = checkListBox.CheckedItems[i] as ECBItem;
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if (o != null && o.Value is IConvertible)
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try { ret |= Convert.ToInt64(o.Value); } catch { }
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}
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@ -135,12 +115,12 @@ namespace Vanara.Windows.Forms
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SelectedIndex = items.FindIndex(i => i.Value == value);
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else
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{
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long lval = Convert.ToInt64(value);
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var lval = Convert.ToInt64(value);
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checkListBox.BeginUpdate();
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for (int i = 0; i < checkListBox.Items.Count; i++)
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for (var i = 0; i < checkListBox.Items.Count; i++)
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{
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long? val = null;
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ECBItem o = checkListBox.Items[i] as ECBItem;
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var o = checkListBox.Items[i] as ECBItem;
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if (o != null && o.Value is IConvertible)
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try { val = Convert.ToInt64(o.Value); } catch { }
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checkListBox.SetItemCheckState(i, (val.HasValue && (val.Value & lval) == val.Value) ? CheckState.Checked : CheckState.Unchecked);
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@ -150,8 +130,21 @@ namespace Vanara.Windows.Forms
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}
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}
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/// <summary>Gets or sets the property to use as the actual value for the items in the <see cref="T:System.Windows.Forms.ListControl"/>.</summary>
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[Browsable(false), EditorBrowsable(EditorBrowsableState.Never), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
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public new string ValueMember { get => base.ValueMember; set => base.ValueMember = value; }
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/// <summary>Gets an object representing the collection of the items contained in this <see cref="T:System.Windows.Forms.ComboBox"/>.</summary>
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[Browsable(false), EditorBrowsable(EditorBrowsableState.Never), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
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public new ObjectCollection Items => base.Items;
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private bool HasFlags => DropDownControl != null;
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/// <summary>Gets the selected value.</summary>
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/// <typeparam name="T">The type of the value to retrieve.</typeparam>
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/// <returns>The selected value cast to <typeparamref name="T"/>.</returns>
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public T GetSelectedValue<T>() => SelectedValue == null ? default : (T)SelectedValue;
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private static Type GetEnumUnderlyingType(Type eType)
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{
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if (!eType.IsEnum)
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@ -162,6 +155,32 @@ namespace Vanara.Windows.Forms
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return fields[0].FieldType;
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}
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private void CheckListBox_ItemCheck(object sender, ItemCheckEventArgs e) => timer.Enabled = true;
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private Type FindType(string name, bool ignoreCase)
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{
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Type t = null;
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foreach (var a in AppDomain.CurrentDomain.GetAssemblies())
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if ((t = a.GetType(name, false, ignoreCase)) != null)
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break;
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return t;
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}
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private string GetFlagText()
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{
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var items = new string[checkListBox.CheckedItems.Count];
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for (var i = 0; i < checkListBox.CheckedItems.Count; i++)
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items[i] = checkListBox.CheckedItems[i].ToString();
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return string.Join(", ", items);
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}
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private void Timer_Tick(object sender, EventArgs e)
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{
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timer.Enabled = false;
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if (HasFlags)
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Text = GetFlagText();
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}
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[Serializable]
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private class ECBItem
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{
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@ -174,7 +193,8 @@ namespace Vanara.Windows.Forms
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public string Text { get; set; }
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public object Value { get; set; }
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public override string ToString() => Text;
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}
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}
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}
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}
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