This commit is contained in:
Kathy Ruffing 2008-03-03 15:21:15 +00:00
parent 63fd25601e
commit bf25814d5b
14 changed files with 1290 additions and 0 deletions

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namespace AT.STO.UI.Win
{
partial class DropDownPanel
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Component Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.combo = new System.Windows.Forms.ComboBox();
this.SuspendLayout();
//
// combo
//
this.combo.DropDownHeight = 1;
this.combo.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
this.combo.FormattingEnabled = true;
this.combo.IntegralHeight = false;
this.combo.Location = new System.Drawing.Point(0, 0);
this.combo.Name = "combo";
this.combo.Size = new System.Drawing.Size(86, 21);
this.combo.TabIndex = 0;
this.combo.DropDown += new System.EventHandler(this.Combo_DropDown);
//
// DropDownPanel
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.Controls.Add(this.combo);
this.Name = "DropDownPanel";
this.Size = new System.Drawing.Size(105, 32);
this.ResumeLayout(false);
}
#endregion
private System.Windows.Forms.ComboBox combo;
}
}

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using System;
using System.ComponentModel;
using System.Diagnostics;
using System.Drawing;
using System.Windows.Forms;
namespace AT.STO.UI.Win
{
/// <summary>
/// Control that allows any other control that implements IDropDownAware to be displayed
/// in it's own combo-like dropdown area. This Control tries to mimic the standard ComboBox
/// as accurately as possible.
/// </summary>
public partial class DropDownPanel : UserControl, IDropDownAware
{
#region Private Variable Declarations
private IDropDownAware _dropDownControl = null;
private DropDownWindowHelper _dropDownHelper = null;
private Form _owner = null;
#endregion
#region Constructor / Destructor
/// <summary>
/// Default constructor
/// </summary>
public DropDownPanel()
{
InitializeComponent();
_dropDownHelper = new DropDownWindowHelper();
_dropDownHelper.DropDownClosed += new DropDownClosedEventHandler(DropDownHelper_DropDownClosed);
_dropDownHelper.DropDownCancel += new DropDownCancelEventHandler(DropDownHelper_DropDownCancel);
combo.DisplayMember = "Text";
combo.ValueMember = "Id";
}
#endregion
#region Control Events
/// <summary>
/// The owning form is set within this event, wich is required to
/// force the owning form not to loose focus when the dropdown is
/// being displayed. Inherited controls should provide the PopupControl
/// within an overridden implementation of this event.
/// </summary>
/// <param name="e"></param>
protected override void OnHandleCreated(EventArgs e)
{
_owner = this.FindForm();
_dropDownHelper.ReleaseHandle();
if (_owner != null)
{
_dropDownHelper.AssignHandle(_owner.Handle);
}
}
/// <summary>
/// Make sure that the overall control's height is exactly the height
/// of the internal ComboBox and that the ComboBox's widt is exactly the
/// width of the control.
/// </summary>
/// <param name="e"></param>
protected override void OnResize(EventArgs e)
{
base.OnResize(e);
combo.Location = new Point(0, 0);
combo.Width = this.ClientRectangle.Width;
this.Height = combo.Height;
}
#endregion
#region Event Handler
/// <summary>
/// We make our DropDownForm host the choosen control and show it instead
/// of the dropdown portion of the ComboBox.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Combo_DropDown(object sender, EventArgs e)
{
if (!_dropDownHelper.DropDownShowing)
{
DropDownForm dropDown = new DropDownForm(_dropDownControl);
dropDown.FinishEditing += new DropDownValueChangedEventHandler(DropDown_FinishEditing);
dropDown.ValueChanged += new DropDownValueChangedEventHandler(DropDown_ValueChanged);
combo.DroppedDown = false;
dropDown.Width = combo.Width; // KBR ADDED 2/15/08
_dropDownHelper.ShowDropDown(_owner, dropDown, GetDropDownPosition(dropDown));
}
else
{
_dropDownHelper.CloseDropDown();
this.Focus();
}
}
private void DropDownHelper_DropDownClosed(object sender, DropDownClosedEventArgs e)
{
IDropDownAware dropDown = (e.DropDown as IDropDownAware);
if ((dropDown != null) && (dropDown.Value != null))
{
dropDown.FinishEditing -= new DropDownValueChangedEventHandler(DropDown_FinishEditing);
dropDown.ValueChanged -= new DropDownValueChangedEventHandler(DropDown_ValueChanged);
}
combo.DroppedDown = false;
}
private void DropDownHelper_DropDownCancel(object sender, DropDownCancelEventArgs e)
{
if (this.Bounds.Contains(Parent.PointToClient(e.CursorLocation)))
{
e.Cancel = true;
}
else
{
IDropDownAware dropDown = (e.DropDown as IDropDownAware);
if (dropDown != null)
{
dropDown.FinishEditing -= new DropDownValueChangedEventHandler(DropDown_FinishEditing);
dropDown.ValueChanged -= new DropDownValueChangedEventHandler(DropDown_ValueChanged);
}
}
}
private void DropDown_FinishEditing(object sender, DropDownValueChangedEventArgs e)
{
if (e.Value != null)
{
SetValue<long>(e.Value as ILookupItem<long>);
}
if (this.FinishEditing != null)
{
this.FinishEditing(this, e);
}
_dropDownControl.FinishEditing -= new DropDownValueChangedEventHandler(DropDown_FinishEditing);
_dropDownControl.ValueChanged -= new DropDownValueChangedEventHandler(DropDown_ValueChanged);
_dropDownHelper.CloseDropDown();
}
private void DropDown_ValueChanged(object sender, DropDownValueChangedEventArgs e)
{
if (this.ValueChanged != null)
{
this.ValueChanged(this, e);
}
}
#endregion
#region Public Properties
/// <summary>
/// Get or set the control (has to implement IDropDownAware) that is to
/// be displayed as the dropdown portion of the combobox.
/// </summary>
[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
public IDropDownAware DropDownControl
{
get { return _dropDownControl; }
set
{
_dropDownControl = value;
this.Controls.Add(_dropDownControl as Control);
}
}
#endregion
#region Public Methods
public override string ToString()
{
return this.Name;
}
#endregion
#region Private Methods
/// <summary>
/// Calculate an acceptable position of the DropDownForm even in a
/// multi screen environment.
/// </summary>
/// <param name="DropDown"></param>
/// <returns></returns>
private Point GetDropDownPosition(DropDownForm DropDown)
{
Point lt = Parent.PointToScreen(new Point(Left, Top));
Point rb = Parent.PointToScreen(new Point(Right, Bottom));
Rectangle screen = Screen.FromControl(this).Bounds;
Point point = new Point();
if (((lt.X + DropDown.Width) > (screen.X + screen.Width)) && ((rb.X - DropDown.Width) >= screen.X))
{
point.X = rb.X - DropDown.Width;
if ((point.X + DropDown.Width) > (screen.X + screen.Width))
{
point.X = ((screen.X + screen.Width) - DropDown.Width);
}
}
else
{
point.X = lt.X;
if (point.X < screen.X)
{
point.X = screen.X;
}
}
if (((rb.Y + DropDown.Height) > (screen.Y + screen.Height)) && ((lt.Y - DropDown.Height) >= screen.Y))
{
point.Y = lt.Y - DropDown.Height;
if (point.Y < screen.Y)
{
point.Y = screen.Y;
}
}
else
{
point.Y = rb.Y;
if ((point.Y + DropDown.Height) > (screen.Y + screen.Height))
{
point.Y = ((screen.Y + screen.Height) - DropDown.Height);
}
}
return point;
}
/// <summary>
/// In this implementation we don't the user to edit the ComboBox
/// directly, so we add the new value to the item collection after
/// clearing it first.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="Value"></param>
private void SetValue<T>(ILookupItem<T> Value) where T: struct
{
if (DropDownControl != null)
{
ILookupItem<T>[] arr = new ILookupItem<T>[0];
combo.DataSource = arr;
if ((Value != null) && (Value is ILookupItem<long>))
{
DropDownControl.Value = Value;
arr = new ILookupItem<T>[1]{(ILookupItem<T>) Value};
combo.DataSource = arr;
combo.SelectedIndex = 0;
combo.Focus();
}
else
{
DropDownControl.Value = null;
}
}
}
#endregion
#region IDropDownAware Implementation
/// <summary>
/// Fired either on OK, Cancel or a click outside the control to indicate
/// that the user has finished editing.
/// </summary>
public event DropDownValueChangedEventHandler FinishEditing;
/// <summary>
/// Fired on any change of the controls's value during the editing process.
/// </summary>
public event DropDownValueChangedEventHandler ValueChanged;
/// <summary>
/// Gets or sets the controls' value.
/// </summary>
[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
public object Value
{
get { return _dropDownControl.Value; }
set { SetValue<long>(value as ILookupItem<long>); }
}
#endregion
}
}

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<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<PropertyGroup>
<Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
<Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
<ProductVersion>8.0.50727</ProductVersion>
<SchemaVersion>2.0</SchemaVersion>
<ProjectGuid>{34ADDF19-CBBA-4A11-BC99-D141BA2D29EC}</ProjectGuid>
<OutputType>Library</OutputType>
<AppDesignerFolder>Properties</AppDesignerFolder>
<RootNamespace>DropDownPanel</RootNamespace>
<AssemblyName>DropDownPanel</AssemblyName>
<SccProjectName>SAK</SccProjectName>
<SccLocalPath>SAK</SccLocalPath>
<SccAuxPath>SAK</SccAuxPath>
<SccProvider>SAK</SccProvider>
</PropertyGroup>
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
<DebugSymbols>true</DebugSymbols>
<DebugType>full</DebugType>
<Optimize>false</Optimize>
<OutputPath>bin\Debug\</OutputPath>
<DefineConstants>DEBUG;TRACE</DefineConstants>
<ErrorReport>prompt</ErrorReport>
<WarningLevel>4</WarningLevel>
</PropertyGroup>
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
<DebugType>pdbonly</DebugType>
<Optimize>true</Optimize>
<OutputPath>bin\Release\</OutputPath>
<DefineConstants>TRACE</DefineConstants>
<ErrorReport>prompt</ErrorReport>
<WarningLevel>4</WarningLevel>
</PropertyGroup>
<ItemGroup>
<Reference Include="System" />
<Reference Include="System.Data" />
<Reference Include="System.Drawing" />
<Reference Include="System.Windows.Forms" />
<Reference Include="System.Xml" />
</ItemGroup>
<ItemGroup>
<Compile Include="Forms\DropDownForm.cs">
<SubType>Form</SubType>
</Compile>
<Compile Include="Forms\DropDownForm.designer.cs">
<DependentUpon>DropDownForm.cs</DependentUpon>
</Compile>
<Compile Include="Controls\DropDownPanel.cs">
<SubType>UserControl</SubType>
</Compile>
<Compile Include="Controls\DropDownPanel.Designer.cs">
<DependentUpon>DropDownPanel.cs</DependentUpon>
</Compile>
<Compile Include="Helper\DropDownWindowHelper.cs" />
<Compile Include="Helper\DropDownMessageFilter.cs" />
<Compile Include="Events\Events.cs" />
<Compile Include="Interfaces\IDropDownAware.cs" />
<Compile Include="Interfaces\ILookupItem.cs" />
<Compile Include="Properties\AssemblyInfo.cs" />
<Compile Include="Unmanaged\UIApiCalls.cs" />
<Service Include="{94E38DFF-614B-4cbd-B67C-F211BB35CE8B}" />
</ItemGroup>
<ItemGroup>
<EmbeddedResource Include="Forms\DropDownForm.resx">
<DependentUpon>DropDownForm.cs</DependentUpon>
<SubType>Designer</SubType>
</EmbeddedResource>
</ItemGroup>
<Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
<!-- To modify your build process, add your task inside one of the targets below and uncomment it.
Other similar extension points exist, see Microsoft.Common.targets.
<Target Name="BeforeBuild">
</Target>
<Target Name="AfterBuild">
</Target>
-->
</Project>

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""
{
"FILE_VERSION" = "9237"
"ENLISTMENT_CHOICE" = "NEVER"
"PROJECT_FILE_RELATIVE_PATH" = ""
"NUMBER_OF_EXCLUDED_FILES" = "0"
"ORIGINAL_PROJECT_FILE_PATH" = ""
"NUMBER_OF_NESTED_PROJECTS" = "0"
"SOURCE_CONTROL_SETTINGS_PROVIDER" = "PROVIDER"
}

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using System;
using System.Drawing;
using System.Windows.Forms;
namespace AT.STO.UI.Win
{
/// <summary>
/// Represents the method which responds to a <see cref="DropDownCancel"/> event.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
public delegate void DropDownCancelEventHandler(object sender, DropDownCancelEventArgs e);
/// <summary>
/// Represents the method which responds to a <see cref="DropDownClosed"/> event.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
public delegate void DropDownClosedEventHandler(object sender, DropDownClosedEventArgs e);
/// <summary>
///
/// </summary>
/// <param name="sender">The object firing the event.</param>
/// <param name="e"></param>
public delegate void DropDownValueChangedEventHandler(object sender, DropDownValueChangedEventArgs e);
/// <summary>
/// Arguments to a <see cref="DropDownCancelEvent"/>. Provides a
/// reference to the popup form that is to be closed and
/// allows the operation to be cancelled.
///
/// Thousand thanks to Steve McMahon:
/// http://www.vbaccelerator.com/home/NET/Code/Controls/Popup_Windows/Popup_Windows/Popup_Form_Demonstration.asp
/// </summary>
public class DropDownCancelEventArgs : EventArgs
{
#region Private Variable Declarations
private bool _cancel = false;
private Point _cursorLocation;
private Form _dropDown = null;
#endregion
#region Constructor / Destructor
/// <summary>
/// Constructs a new instance of this class.
/// </summary>
/// <param name="DropDown">The popup form</param>
/// <param name="CursorLocation">The mouse location, if any, where the
/// mouse event that would cancel the popup occured.</param>
public DropDownCancelEventArgs(Form DropDown, Point CursorLocation)
{
_dropDown = DropDown;
_cursorLocation = CursorLocation;
_cancel = false;
}
#endregion
#region Public Properties
/// <summary>
///
/// </summary>
public bool Cancel
{
get { return _cancel; }
set { _cancel = value; }
}
/// <summary>
///
/// </summary>
public Point CursorLocation
{
get { return _cursorLocation; }
}
/// <summary>
///
/// </summary>
public Form DropDown
{
get { return _dropDown; }
}
#endregion
}
/// <summary>
/// Contains event information for a <see cref="DropDownClosed"/> event.
///
/// Thousand thanks to Steve McMahon:
/// http://www.vbaccelerator.com/home/NET/Code/Controls/Popup_Windows/Popup_Windows/Popup_Form_Demonstration.asp
/// </summary>
public class DropDownClosedEventArgs : EventArgs
{
#region Private Variable Declarations
private Form _dropDown = null;
#endregion
#region Constructor / Destructor
/// <summary>
/// Constructs a new instance of this class for the specified
/// popup form.
/// </summary>
/// <param name="DropDown">DropDown Form which is being closed.</param>
public DropDownClosedEventArgs(Form DropDown)
{
_dropDown = DropDown;
}
#endregion
#region Public Properties
/// <summary>
/// Gets the dropdown form which is being closed.
/// </summary>
public Form DropDown
{
get { return _dropDown; }
}
#endregion
}
/// <summary>
/// Contains event information for DropDownValueChangedEventHandler.
/// </summary>
public class DropDownValueChangedEventArgs : EventArgs
{
#region Private Variable Declarations
private object _value = null;
#endregion
#region Constructor / Destructor
/// <summary>
/// Default Constructor
/// </summary>
public DropDownValueChangedEventArgs()
{
}
/// <summary>
/// Initialization with the control's value.
/// </summary>
/// <param name="Value"></param>
public DropDownValueChangedEventArgs(object Value)
{
_value = Value;
}
#endregion
#region Public Properties
/// <summary>
/// Gets or sets the control's value.
/// </summary>
public object Value
{
get { return _value; }
set { _value = value; }
}
#endregion
}
}

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using System;
using System.ComponentModel;
using System.Drawing;
using System.Windows.Forms;
namespace AT.STO.UI.Win
{
/// <summary>
/// The form that pops up instead of the dropdown portion of the
/// DropDownPanel's combobox. It containes the actual control to
/// display.
/// </summary>
internal partial class DropDownForm : Form, IDropDownAware
{
#region Private Variable Declaration
private IDropDownAware _control = null;
#endregion
#region Constructor / Destructor
/// <summary>
/// Default Constructor
/// </summary>
public DropDownForm()
{
InitializeComponent();
}
/// <summary>
/// Constructor to initialize the for with the control to display.
/// </summary>
/// <param name="Ctrl">The control to display.</param>
public DropDownForm(IDropDownAware Ctrl) : this()
{
if (Ctrl != null)
{
_control = Ctrl;
InitializeControl(_control as Control);
}
}
#endregion
#region Form Events
protected override void OnClosing(CancelEventArgs e)
{
this.Controls.Remove(_control as Control);
base.OnClosing(e);
}
protected override void OnShown(EventArgs e)
{
base.OnShown(e);
_control.FinishEditing += new DropDownValueChangedEventHandler(Ctrl_FinishEditing);
_control.ValueChanged += new DropDownValueChangedEventHandler(Ctrl_ValueChanged);
}
#endregion
#region Event Handler
private void Ctrl_FinishEditing(object sender, DropDownValueChangedEventArgs e)
{
if (this.FinishEditing != null)
{
this.FinishEditing(this, e);
}
_control.FinishEditing -= new DropDownValueChangedEventHandler(Ctrl_FinishEditing);
_control.ValueChanged -= new DropDownValueChangedEventHandler(Ctrl_ValueChanged);
}
private void Ctrl_ValueChanged(object sender, DropDownValueChangedEventArgs e)
{
if (this.ValueChanged != null)
{
this.ValueChanged(this, e);
}
}
#endregion
#region IDropDownAware Implementation
/// <summary>
/// Fired either on OK, Cancel or a click outside the control to indicate
/// that the user has finished editing.
/// </summary>
public event DropDownValueChangedEventHandler FinishEditing;
/// <summary>
/// Fired on any change of the controls's value during the editing process.
/// </summary>
public event DropDownValueChangedEventHandler ValueChanged;
/// <summary>
/// Gets or sets the controls' value.
/// </summary>
public object Value
{
get { return _control.Value; }
set { _control.Value = value; }
}
#endregion
#region Private Methods
private void InitializeControl(Control Ctrl)
{
Size size = Ctrl.Size;
Size inner = this.ClientRectangle.Size;
Size outer = this.Size;
int gap = outer.Width - inner.Width;
size.Width += gap;
size.Height += gap;
this.Size = size;
this.Controls.Add(Ctrl);
Ctrl.Location = new Point(0, 0);
Ctrl.Visible = true;
Ctrl.Invalidate();
}
#endregion
}
}

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namespace AT.STO.UI.Win
{
partial class DropDownForm
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.SuspendLayout();
//
// DropDownForm
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.BackColor = System.Drawing.SystemColors.Window;
this.ClientSize = new System.Drawing.Size(347, 211);
this.ControlBox = false;
this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedToolWindow;
this.MaximizeBox = false;
this.MinimizeBox = false;
this.Name = "DropDownForm";
this.ShowIcon = false;
this.ShowInTaskbar = false;
this.ResumeLayout(false);
}
#endregion
}
}

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</xsd:complexType>
</xsd:element>
</xsd:schema>
<resheader name="resmimetype">
<value>text/microsoft-resx</value>
</resheader>
<resheader name="version">
<value>2.0</value>
</resheader>
<resheader name="reader">
<value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
</resheader>
<resheader name="writer">
<value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
</resheader>
</root>

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using System;
using System.Drawing;
using System.Windows.Forms;
namespace AT.STO.UI.Win
{
/// <summary>
/// A Message Loop filter which detect mouse events whilst the popup form is shown
/// and notifies the owning <see cref="PopupWindowHelper"/> class when a mouse
/// click outside the popup occurs.
///
/// Thousand thanks to Steve McMahon:
/// http://www.vbaccelerator.com/home/NET/Code/Controls/Popup_Windows/Popup_Windows/Popup_Form_Demonstration.asp
/// </summary>
internal class DropDownMessageFilter : IMessageFilter
{
#region Private Constants
private const int WM_LBUTTONDOWN = 0x201;
private const int WM_RBUTTONDOWN = 0x204;
private const int WM_MBUTTONDOWN = 0x207;
private const int WM_NCLBUTTONDOWN = 0x0A1;
private const int WM_NCRBUTTONDOWN = 0x0A4;
private const int WM_NCMBUTTONDOWN = 0x0A7;
#endregion
#region Private Variable Declarations
private Form _dropDown = null;
private DropDownWindowHelper _owner = null;
#endregion
#region Event Declarations
public event DropDownCancelEventHandler DropDownCancel;
#endregion
#region Constructor / Destructor
/// <summary>
/// Constructs a new instance of this class and sets the owning
/// object.
/// </summary>
/// <param name="Owner">The <see cref="DropDownWindowHelper"/> object
/// which owns this class.</param>
public DropDownMessageFilter(DropDownWindowHelper Owner)
{
_owner = Owner;
}
#endregion
#region Public Properties
/// <summary>
/// Gets/sets the dropdown form which is being displayed.
/// </summary>
public Form DropDown
{
get { return _dropDown; }
set { _dropDown = value; }
}
#endregion
#region Private Methods
private void OnMouseDown()
{
Point cursorPos = Cursor.Position; // Get the cursor location
if (!_dropDown.Bounds.Contains(cursorPos)) // Check if it is within the popup form
{
OnDropDownCancel(new DropDownCancelEventArgs(_dropDown, cursorPos)); // If not, then call to see if it should be closed
}
}
#endregion
#region DropDownCancelEvent Implementation
protected virtual void OnDropDownCancel(DropDownCancelEventArgs e)
{
if (this.DropDownCancel != null)
{
this.DropDownCancel(this, e);
}
if (!e.Cancel)
{
_owner.CloseDropDown();
_dropDown = null; // Clear reference for GC
}
}
#endregion
#region IMessageFilter Implementation
/// <summary>
/// Checks the message loop for mouse messages whilst the popup
/// window is displayed. If one is detected the position is
/// checked to see if it is outside the form, and the owner
/// is notified if so.
/// </summary>
/// <param name="m">Windows Message about to be processed by the
/// message loop</param>
/// <returns><c>true</c> to filter the message, <c>false</c> otherwise.
/// This implementation always returns <c>false</c>.</returns>
public bool PreFilterMessage(ref Message m)
{
if (_dropDown != null)
{
switch (m.Msg)
{
case WM_LBUTTONDOWN:
case WM_RBUTTONDOWN:
case WM_MBUTTONDOWN:
case WM_NCLBUTTONDOWN:
case WM_NCRBUTTONDOWN:
case WM_NCMBUTTONDOWN: OnMouseDown(); break;
}
}
return false;
}
#endregion
}
}

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using System;
using System.Drawing;
using System.Runtime.InteropServices;
using System.Windows.Forms;
namespace AT.STO.UI.Win
{
/// <summary>
/// A class to assist in creating popup windows like Combo Box drop-downs and Menus.
/// This class includes functionality to keep the title bar of the popup owner form
/// active whilst the popup is displayed, and to automatically cancel the popup
/// whenever the user clicks outside the popup window or shifts focus to another
/// application.
///
/// Thousand thanks to Steve McMahon:
/// http://www.vbaccelerator.com/home/NET/Code/Controls/Popup_Windows/Popup_Windows/Popup_Form_Demonstration.asp
/// </summary>
internal class DropDownWindowHelper : NativeWindow
{
#region Private Variable Declarations
private EventHandler DropDownClosedHandler = null;
private Form _dropDown = null;
private bool _dropDownShowing = false;
private DropDownMessageFilter _filter = null;
private Form _owner = null;
private bool _skipClose = false;
#endregion
#region Event Declarations
public event DropDownCancelEventHandler DropDownCancel;
public event DropDownClosedEventHandler DropDownClosed;
#endregion
#region Constructor / Destructor
/// <summary>
/// Default constructor.
/// </summary>
/// <remarks>Use the <see cref="System.Windows.Forms.NativeWindow.AssignHandle"/>
/// method to attach this class to the form you want to show popups from.</remarks>
public DropDownWindowHelper()
{
_filter = new DropDownMessageFilter(this);
_filter.DropDownCancel += new DropDownCancelEventHandler(Popup_Cancel);
}
#endregion
#region Event Handler
private void Popup_Cancel(object sender, DropDownCancelEventArgs e)
{
OnDropDownCancel(e);
}
/// <summary>
/// Responds to the <see cref="System.Windows.Forms.Form.Closed"/>
/// event from the popup form.
/// </summary>
/// <param name="sender">Popup form that has been closed.</param>
/// <param name="e">Not used.</param>
private void Popup_Closed(object sender, EventArgs e)
{
CloseDropDown();
}
/// <summary>
/// Subclasses the owning form's existing Window Procedure to enables the
/// title bar to remain active when a popup is show, and to detect if
/// the user clicks onto another application whilst the popup is visible.
/// </summary>
/// <param name="m">Window Procedure Message</param>
protected override void WndProc(ref Message m)
{
base.WndProc(ref m);
if (DropDownShowing)
{
if (m.Msg == UIApiCalls.WM_NCACTIVATE)
{
if (((int)m.WParam) == 0) // Check if the title bar will made inactive:
{ // Note it's no good to try and consume this message; if you try to do that you'll end up with windows
UIApiCalls.SendMessage(this.Handle, UIApiCalls.WM_NCACTIVATE, 1, IntPtr.Zero); // If so reactivate it.
}
}
else if (m.Msg == UIApiCalls.WM_ACTIVATEAPP)
{
if ((int)m.WParam == 0) // Check if the application is being deactivated.
{
CloseDropDown(); // It is so cancel the popup:
UIApiCalls.PostMessage(this.Handle, UIApiCalls.WM_NCACTIVATE, 0, IntPtr.Zero); // And put the title bar into the inactive state:
}
}
}
}
#endregion
#region Public Methods
/// <summary>
/// Shows the specified Form as a popup window, keeping the
/// Owner's title bar active and preparing to cancel the popup
/// should the user click anywhere outside the popup window.
/// <para>Typical code to use this message is as follows:</para>
/// <code>
/// frmPopup popup = new frmPopup();
/// Point location = this.PointToScreen(new Point(button1.Left, button1.Bottom));
/// popupHelper.ShowPopup(this, popup, location);
/// </code>
/// <para>Put as much initialisation code as possible
/// into the popup form's constructor, rather than the <see cref="System.Windows.Forms.Load"/>
/// event as this will improve visual appearance.</para>
/// </summary>
/// <param name="Owner">Main form which owns the popup</param>
/// <param name="Popup">Window to show as a popup</param>
/// <param name="v">Location relative to the screen to show the popup at.</param>
public void ShowDropDown(Form Owner, Form DropDown, Point Location)
{
_owner = Owner;
_dropDown = DropDown;
Application.AddMessageFilter(_filter); // Start checking for the popup being cancelled
DropDown.StartPosition = FormStartPosition.Manual; // Set the location of the popup form:
DropDown.Location = Location;
Owner.AddOwnedForm(DropDown); // Make it owned by the window that's displaying it:
DropDownClosedHandler = new EventHandler(Popup_Closed); // Respond to the Closed event in case the popup is closed by its own internal means
DropDown.Closed += DropDownClosedHandler;
_dropDownShowing = true; // Show the popup:
DropDown.Show();
DropDown.Activate();
// A little bit of fun. We've shown the popup, but because we've kept the main window's
// title bar in focus the tab sequence isn't quite right. This can be fixed by sending a tab,
// but that on its own would shift focus to the second control in the form. So send a tab,
// followed by a reverse-tab.
UIApiCalls.keybd_event((byte) Keys.Tab, 0, 0, 0);
UIApiCalls.keybd_event((byte) Keys.Tab, 0, UIApiCalls.KEYEVENTF_KEYUP, 0);
UIApiCalls.keybd_event((byte) Keys.ShiftKey, 0, 0, 0);
UIApiCalls.keybd_event((byte) Keys.Tab, 0, 0, 0);
UIApiCalls.keybd_event((byte) Keys.Tab, 0, UIApiCalls.KEYEVENTF_KEYUP, 0);
UIApiCalls.keybd_event((byte) Keys.ShiftKey, 0, UIApiCalls.KEYEVENTF_KEYUP, 0);
_filter.DropDown = DropDown; // Start filtering for mouse clicks outside the popup
}
/// <summary>
/// Called when the popup is being hidden.
/// </summary>
public void CloseDropDown()
{
if (DropDownShowing)
{
if (!_skipClose)
{
OnPDropDownClosed(new DropDownClosedEventArgs(_dropDown));
}
_skipClose = false;
_owner.RemoveOwnedForm(_dropDown); // Make sure the popup is closed and we've cleaned up:
_dropDownShowing = false;
_dropDown.Closed -= DropDownClosedHandler;
DropDownClosedHandler = null;
_dropDown.Close();
Application.RemoveMessageFilter(_filter); // No longer need to filter for clicks outside the popup.
// If we did something from the popup which shifted focus to a new form, like showing another popup
// or dialog, then Windows won't know how to bring the original owner back to the foreground, so
// force it here:
_owner.Activate();
_dropDown = null; // Null out references for GC
_owner = null;
}
}
#endregion
#region Public Properties
/// <summary>
/// Indicator weither the DropDown is showing.
/// </summary>
public bool DropDownShowing
{
get { return _dropDownShowing; }
}
#endregion
#region Event Implementation
protected virtual void OnDropDownCancel(DropDownCancelEventArgs e)
{
if (this.DropDownCancel != null)
{
this.DropDownCancel(this, e);
if (!e.Cancel)
{
_skipClose = true;
}
}
}
protected virtual void OnPDropDownClosed(DropDownClosedEventArgs e)
{
if (this.DropDownClosed != null)
{
this.DropDownClosed(this, e);
}
}
#endregion
}
}

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using System;
namespace AT.STO.UI.Win
{
/// <summary>
/// Standard interface that has to be implemented by control's that
/// should be diplayed in the dropdown area of the DropDownPanel.
/// </summary>
public interface IDropDownAware
{
#region Event Declarations
/// <summary>
/// Fired either on OK, Cancel or a click outside the control to indicate
/// that the user has finished editing.
/// </summary>
event DropDownValueChangedEventHandler FinishEditing;
/// <summary>
/// Fired on any change of the controls's value during the editing process.
/// </summary>
event DropDownValueChangedEventHandler ValueChanged;
#endregion
#region Public Properties
/// <summary>
/// Gets or sets the controls' value.
/// </summary>
object Value { get; set; }
#endregion
}
}

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using System;
namespace AT.STO.UI.Win
{
public interface ILookupItem<T> where T: struct
{
T Id { get; }
string Text { get; }
}
}

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using System.Reflection;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
// General Information about an assembly is controlled through the following
// set of attributes. Change these attribute values to modify the information
// associated with an assembly.
[assembly: AssemblyTitle("DropDownPanel")]
[assembly: AssemblyDescription("")]
[assembly: AssemblyConfiguration("")]
[assembly: AssemblyCompany("")]
[assembly: AssemblyProduct("DropDownPanel")]
[assembly: AssemblyCopyright("Copyright © 2007")]
[assembly: AssemblyTrademark("")]
[assembly: AssemblyCulture("")]
// Setting ComVisible to false makes the types in this assembly not visible
// to COM components. If you need to access a type in this assembly from
// COM, set the ComVisible attribute to true on that type.
[assembly: ComVisible(false)]
// The following GUID is for the ID of the typelib if this project is exposed to COM
[assembly: Guid("d59d03fc-b0ff-4210-867d-cfa4cef1728c")]
// Version information for an assembly consists of the following four values:
//
// Major Version
// Minor Version
// Build Number
// Revision
//
// You can specify all the values or you can default the Revision and Build Numbers
// by using the '*' as shown below:
[assembly: AssemblyVersion("1.0.*")]
[assembly: AssemblyFileVersion("1.0.0.0")]

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using System;
using System.Runtime.InteropServices;
namespace AT.STO.UI.Win
{
public static class UIApiCalls
{
#region Public Constants
public const int WM_ACTIVATE = 0x006;
public const int WM_ACTIVATEAPP = 0x01C;
public const int WM_NCACTIVATE = 0x086;
public const int KEYEVENTF_KEYUP = 0x0002;
#endregion
#region Public Static API Calls
[DllImport("user32", CharSet = CharSet.Auto)]
public extern static int SendMessage(IntPtr handle, int msg, int wParam, IntPtr lParam);
[DllImport("user32", CharSet = CharSet.Auto)]
public extern static int PostMessage(IntPtr handle, int msg, int wParam, IntPtr lParam);
[DllImport("user32")]
public extern static void keybd_event(byte bVk, byte bScan, int dwFlags, int dwExtraInfo);
#endregion
}
}