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LookupPropertyEditorEx.cs
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LookupPropertyEditorEx.cs
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using System;
using System.Collections;
using DevExpress.ExpressApp;
using DevExpress.ExpressApp.Model;
using DevExpress.ExpressApp.Editors;
using DevExpress.XtraEditors.Controls;
using DevExpress.ExpressApp.Win.Editors;
using DevExpress.XtraEditors.Repository;
using DevExpress.ExpressApp.Utils;
namespace Editors.Win {
[PropertyEditor(typeof(object), EditorAliases.LookupPropertyEditor, false)]
public class LookupPropertyEditorEx : DXPropertyEditor, IComplexViewItem {
private const string AddButtonTag = "AddButtonTag";
private const string MinusButtonTag = "MinusButtonTag";
private const string OpenButtonTag = "OpenButtonTag";
private LookupEditorHelper helperCore;
private DevExpress.ExpressApp.View lookupObjectView;
public LookupPropertyEditorEx(Type objectType, IModelMemberViewItem item)
: base(objectType, item) {
}
void IComplexViewItem.Setup(IObjectSpace objectSpace, XafApplication application) {
if(this.helperCore == null) {
this.helperCore = new LookupEditorHelper(application, objectSpace, MemberInfo.MemberTypeInfo, Model);
}
this.helperCore.SetObjectSpace(objectSpace);
this.helperCore.ObjectSpace.Reloaded += ObjectSpace_Reloaded;
}
protected override void Dispose(bool disposing) {
try {
if(disposing) {
if(this.helperCore != null && this.helperCore.ObjectSpace != null) {
this.helperCore.ObjectSpace.Reloaded -= ObjectSpace_Reloaded;
this.helperCore = null;
}
lookupObjectView = null;
}
}
finally {
base.Dispose(disposing);
}
}
protected override object CreateControlCore() {
return new LookUpEditEx();
}
protected override RepositoryItem CreateRepositoryItem() {
return new RepositoryItemLookUpEditEx();
}
protected override void SetupRepositoryItem(RepositoryItem item) {
base.SetupRepositoryItem(item);
RepositoryItemLookUpEditEx properties = (RepositoryItemLookUpEditEx)item;
properties.Init(DisplayFormat, helperCore);
properties.Enter += properties_Enter;
properties.ButtonClick += properties_ButtonClick;
properties.EditValueChanged += properties_EditValueChanged;
properties.Closed += properties_Closed;
properties.Disposed += properties_Disposed;
EditorButton openButton = new EditorButton(ButtonPredefines.Ellipsis);
openButton.Tag = OpenButtonTag;
openButton.Enabled = AllowEdit.ResultValue;
openButton.ToolTip = CaptionHelper.GetLocalizedText("Controls/LookupPropertyEditorEx", "OpenButtonToolTip");
properties.Buttons.Add(openButton);
EditorButton addButton = new EditorButton(ButtonPredefines.Plus);
addButton.Tag = AddButtonTag;
addButton.Enabled = AllowEdit.ResultValue;
addButton.ToolTip = CaptionHelper.GetLocalizedText("Controls/LookupPropertyEditorEx", "AddButtonToolTip");
properties.Buttons.Add(addButton);
EditorButton minusButton = new EditorButton(ButtonPredefines.Minus);
minusButton.Tag = MinusButtonTag;
minusButton.Enabled = AllowEdit.ResultValue;
minusButton.ToolTip = CaptionHelper.GetLocalizedText("Controls/LookupPropertyEditorEx", "MinusButtonToolTip");
properties.Buttons.Add(minusButton);
}
private void properties_Disposed(object sender, EventArgs e) {
RepositoryItemLookUpEditEx properties = (RepositoryItemLookUpEditEx)sender;
properties.Enter -= properties_Enter;
properties.ButtonClick -= properties_ButtonClick;
properties.EditValueChanged -= properties_EditValueChanged;
properties.Disposed -= properties_Disposed;
properties.Closed -= properties_Closed;
}
private void properties_EditValueChanged(object sender, EventArgs e) {
LookUpEditEx lookup = (LookUpEditEx)sender;
UpdateButtons(lookup);
}
private void properties_Closed(object sender, ClosedEventArgs e) {
LookUpEditEx lookup = (LookUpEditEx)sender;
UpdateButtons(lookup);
}
private void properties_Enter(object sender, EventArgs e) {
LookUpEditEx lookup = (LookUpEditEx)sender;
InitializeDataSource(lookup);
UpdateButtons(lookup);
}
private void UpdateButtons(LookUpEditEx lookup) {
if (!lookup.IsPopupOpen) {
bool enabled = (lookup.EditValue != null) && (lookup.EditValue != DBNull.Value);
lookup.Properties.Buttons[1].Enabled = enabled;
lookup.Properties.Buttons[3].Enabled = enabled;
}
}
protected virtual void InitializeDataSource(LookUpEditEx lookup) {
if(lookup != null && lookup.Properties != null && lookup.Properties.Helper != null) {
lookup.InitializeDataSource();
}
}
private void ObjectSpace_Reloaded(object sender, EventArgs e) {
InitializeDataSource(Control);
}
private void properties_ButtonClick(object sender, ButtonPressedEventArgs e) {
LookUpEditEx lookup = (LookUpEditEx)sender;
string tag = Convert.ToString(e.Button.Tag);
if(tag == OpenButtonTag) {
OpenCurrentObject(lookup);
}
if(tag == MinusButtonTag) {
ClearCurrentObject(lookup);
}
if(tag == AddButtonTag) {
AddNewObject(lookup);
}
}
protected virtual void OpenCurrentObject(LookUpEditEx lookup) {
IObjectSpace openObjectViewObjectSpace = lookup.Properties.Helper.Application.CreateObjectSpace(lookup.Properties.Helper.LookupObjectTypeInfo.Type);
object targetObject = openObjectViewObjectSpace.GetObject(lookup.EditValue);
if(targetObject != null) {
EventHandler committedEventHandler = (s, e) => {
if(lookupObjectView != null) {
lookup.EditValue = lookup.Properties.Helper.ObjectSpace.GetObject(lookupObjectView.CurrentObject);
}
};
EventHandler disposedEventHandler = null;
disposedEventHandler = (s, e) => {
IObjectSpace os = (IObjectSpace)s;
os.Disposed -= disposedEventHandler;
os.Committed -= committedEventHandler;
};
openObjectViewObjectSpace.Committed += committedEventHandler;
openObjectViewObjectSpace.Disposed += disposedEventHandler;
lookupObjectView = lookup.Properties.Helper.Application.CreateDetailView(openObjectViewObjectSpace, targetObject, true);
lookup.Properties.Helper.Application.ShowViewStrategy.ShowViewInPopupWindow(lookupObjectView);
}
}
protected virtual void ClearCurrentObject(LookUpEditEx lookup) {
lookup.EditValue = null;
DevExpress.ExpressApp.Win.Core.BindingHelper.EndCurrentEdit(lookup);
}
protected virtual void AddNewObject(LookUpEditEx lookup) {
IObjectSpace newObjectViewObjectSpace = lookup.Properties.Helper.Application.CreateObjectSpace(lookup.Properties.Helper.LookupObjectTypeInfo.Type);
object newObject = newObjectViewObjectSpace.CreateObject(lookup.Properties.Helper.LookupObjectTypeInfo.Type);
lookupObjectView = lookup.Properties.Helper.Application.CreateDetailView(newObjectViewObjectSpace, newObject, true);
EventHandler committedEventHandler = (s, e) => {
lookup.EditValue = lookup.Properties.Helper.ObjectSpace.GetObject(lookupObjectView.CurrentObject);
if(lookup.Properties.DataSource != null) {
((IList)lookup.Properties.DataSource).Add(lookup.EditValue);
}
};
EventHandler disposedEventHandler = null;
disposedEventHandler = (s, e) => {
IObjectSpace os = (IObjectSpace)s;
os.Disposed -= disposedEventHandler;
os.Committed -= committedEventHandler;
};
newObjectViewObjectSpace.Committed += committedEventHandler;
newObjectViewObjectSpace.Disposed += disposedEventHandler;
lookup.Properties.Helper.Application.ShowViewStrategy.ShowViewInPopupWindow(lookupObjectView);
}
public LookupEditorHelper Helper {
get { return helperCore; }
}
public new LookUpEditEx Control {
get { return (LookUpEditEx)base.Control; }
}
}
}