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using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Collections.Specialized;
using System.ComponentModel;
using System.Reflection;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Threading;
namespace Pfz.WpfControls
{
/// <summary>
/// Controls that can be bound to a full record.
/// </summary>
public class ObjectBoundControl<ObjectType>:
BoundControl
{
internal WrapGrid _wrapGrid;
internal StackPanel _stackPanel;
/// <summary>
/// Creates a new RecordBoundControl.
/// </summary>
public ObjectBoundControl()
{
_stackPanel = new StackPanel();
Content = _stackPanel;
_propertyBindings.CollectionChanged += propertyBindings_CollectionChanged;
DataContextChanged += _DataContextChanged;
Orientation = System.Windows.Controls.Orientation.Vertical;
}
/// <summary>
/// Gets or sets the orientation of the internal controls.
/// </summary>
public Orientation Orientation
{
get
{
if (_stackPanel != null)
return System.Windows.Controls.Orientation.Vertical;
return System.Windows.Controls.Orientation.Horizontal;
}
set
{
if (value == Orientation)
return;
if (value == System.Windows.Controls.Orientation.Vertical)
{
_stackPanel = new StackPanel();
Content = _stackPanel;
_wrapGrid = null;
}
else
{
_wrapGrid = new WrapGrid();
Content = _wrapGrid;
_stackPanel = null;
}
}
}
private void _DataContextChanged(object sender, DependencyPropertyChangedEventArgs e)
{
ReadFromDataSource();
}
void propertyBindings_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
InvalidateContent();
}
/// <summary>
/// Creates its content.
/// </summary>
protected override void OnCreateContent()
{
base.OnCreateContent();
var children = Children;
children.Clear();
var propertyBindings = _propertyBindings;
foreach(var propertyBinding in propertyBindings)
{
if (propertyBinding == null)
{
children.Add(new Separator());
continue;
}
var control = new PropertyBoundControl<ObjectType>();
control.PropertyBinding = propertyBinding;
control.IsReadOnly = IsReadOnly;
children.Add(control);
}
var args = new RoutedEventArgs(ObjectBoundControl.PropertyBoundControlsCreatedEvent);
RaiseEvent(args);
}
/// <summary>
/// Gets or sets the record to which this control is bound-to.
/// </summary>
[Browsable(false)]
public ObjectType DataSource
{
get
{
object result = DataContext;
if (result is ObjectType)
return (ObjectType)result;
return default(ObjectType);
}
set
{
DataContext = value;
}
}
private ObservableCollection<PropertyBinding> _propertyBindings = new ObservableCollection<PropertyBinding>();
/// <summary>
/// Gets or sets the propeties this control will display.
/// Example as string property:
/// FullTypeName.* (which will get all properties)
/// FullTypeName:PropertyName;OtherPropertyName
/// FullTypeName:PropertyName=Display name;OtherPropertyName=Other display name
/// FullTypeName.PropertyName=Display name;OtherFullTypeName.PropertyName=Other display name
/// </summary>
[TypeConverter(typeof(PropertyBindingsConverter))]
public ObservableCollection<PropertyBinding> PropertyBindings
{
get
{
return _propertyBindings;
}
set
{
if (value == _propertyBindings)
return;
_propertyBindings.Clear();
if (value != null)
foreach(var item in value)
_propertyBindings.Add(item);
}
}
private IEnumerable<PropertyBinding> _AsBoundProperties(PropertyInfo[] propertyInfos)
{
foreach(var propertyInfo in propertyInfos)
yield return new PropertyBinding { Property = propertyInfo };
}
/// <summary>
/// Gets the Children used by this control.
/// </summary>
public UIElementCollection Children
{
get
{
if (_wrapGrid != null)
return _wrapGrid.Children;
return _stackPanel.Children;
}
}
/// <summary>
/// Refreshes (re-reads) the data in all internal controls.
/// </summary>
public void ReadFromDataSource()
{
_readFromDataSourceNeeded = false;
bool isReadOnly = IsReadOnly;
foreach(var control in Children)
{
var valueControl = control as PropertyBoundControl<ObjectType>;
if (valueControl != null)
{
valueControl.IsReadOnly = isReadOnly;
valueControl.ReadFromDataSource();
}
}
}
/// <summary>
/// Calls ReadFromDataSourceNeeded.
/// </summary>
protected override void OnIsReadOnlyChanged()
{
ReadFromDataSourceNeeded();
}
private bool _readFromDataSourceNeeded;
/// <summary>
/// Tells that data-source must be re-read, but does not read it immediatelly.
/// </summary>
public void ReadFromDataSourceNeeded()
{
if (_readFromDataSourceNeeded)
return;
_readFromDataSourceNeeded = true;
Dispatcher.Invoke(new Action(ReadFromDataSource));
}
/// <summary>
/// Event invoked whenever the child-controls are (re-)created.
/// </summary>
public event RoutedEventHandler PropertyBoundControlsCreated
{
add
{
AddHandler(ObjectBoundControl.PropertyBoundControlsCreatedEvent, value);
}
remove
{
RemoveHandler(ObjectBoundControl.PropertyBoundControlsCreatedEvent, value);
}
}
}
/// <summary>
/// Non-generic version of ObjectBoundControl. It's here because
/// Xaml does not support generic-classes and because the events
/// are better registered only once, as non-generic.
/// </summary>
public sealed class ObjectBoundControl:
ObjectBoundControl<object>
{
/// <summary>
/// Event invoked when the ObjectBoundControl finishes creating all
/// it's property-bound controls.
/// </summary>
public static readonly RoutedEvent PropertyBoundControlsCreatedEvent =
EventManager.RegisterRoutedEvent
(
"PropertyBoundControlsCreated",
RoutingStrategy.Direct,
typeof(RoutedEventHandler),
typeof(ObjectBoundControl)
);
}
}
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I started to program computers when I was 11 years old, as a hobbyist, programming in AMOS Basic and Blitz Basic for Amiga.
At 12 I had my first try with assembler, but it was too difficult at the time. Then, in the same year, I learned C and, after learning C, I was finally able to learn assembler (for Motorola 680x0).
Not sure, but probably between 12 and 13, I started to learn C++. I always programmed "in an object oriented way", but using function pointers instead of virtual methods.
At 15 I started to learn Pascal at school and to use Delphi. At 16 I started my first internship (using Delphi). At 18 I started to work professionally using C++ and since then I've developed my programming skills as a professional developer in C++ and C#, generally creating libraries that help other developers do their work easier, faster and with less errors.
Want more info or simply want to contact me?
Take a look at:
http://paulozemek.azurewebsites.net/
Or e-mail me at: paulozemek@outlook.com
Codeproject MVP 2012, 2015 & 2016
Microsoft MVP 2013-2014 (in October 2014 I started working at Microsoft, so I can't be a Microsoft MVP anymore).