/// <summary>
/// Constructs a new instance of DataFormContentLoadEventArgs.
/// </summary>
/// <param name="content">The content that was loaded or will be loaded.</param>
/// <param name="mode">The mode of the DataForm.</param>
public DataFormContentLoadEventArgs(FrameworkElement content, DataFormMode mode)
{
this.Content = content;
this.Mode = mode;
}
/// <summary>
/// Re-generates the UI if a template or direct content change requires it.
/// </summary>
/// <param name="changedTemplateMode">The mode for which template was changed, or null if the content was changed.</param>
/// <param name="oldContent">The old Content value, or null in the case of a template change.</param>
private void RegenerateUI(DataFormMode? changedTemplateMode, object oldContent)
{
if (this.CurrentItemType != null &&
(this._currentlyUsedTemplate.Count == 0 || (this._currentlyUsedTemplate.ContainsKey(this.CurrentItemType) && this.ShouldRegenerateUI(changedTemplateMode))))
{
if (changedTemplateMode == null && this._contentPresenter.Content == oldContent && oldContent != null)
{
this.RemoveContent(oldContent as FrameworkElement);
}
else if (this.Mode == DataFormMode.ReadOnly)
{
this.RemoveContentForType(this.CurrentItemType, this._readOnlyContentsNew);
this.RemoveContentForType(this.CurrentItemType, this._readOnlyContentsOld);
}
else if (this.Mode == DataFormMode.Edit)
{
this.RemoveContentForType(this.CurrentItemType, this._editContentsNew);
this.RemoveContentForType(this.CurrentItemType, this._editContentsOld);
}
else
{
this.RemoveContentForType(this.CurrentItemType, this._addNewContentsNew);
this.RemoveContentForType(this.CurrentItemType, this._addNewContentsOld);
}
this.GenerateUI(false /* clearEntityErrors */);
}
SetAllCanPropertiesAndUpdate(this, true /* onlyUpdateStates */);
}
/// <summary>
/// Returns a value indicating whether or not the UI should be re-generated based on
/// a changed template.
/// </summary>
/// <param name="changedTemplateMode">The mode for which template was changed, or null if the content was changed.</param>
/// <returns>A value indicating whether or not the UI should be re-generated.</returns>
private bool ShouldRegenerateUI(DataFormMode? changedTemplateMode)
{
Debug.Assert(this.CurrentItemType != null, "ShouldUpdateTemplate should never be called if the current item type is null.");
// If the changed template was for the same mode as the current mode,
// we know we should update the template.
if (this.Mode == changedTemplateMode)
{
return true;
}
DataFormMode? currentlyUsedTemplateMode = this._currentlyUsedTemplate[this.CurrentItemType];
if (currentlyUsedTemplateMode == null)
{
// We're currently using direct content, so we will re-generate the UI no matter what
// template has changed (since every template takes precedence over the direct content).
return true;
}
if (changedTemplateMode == null)
{
// We're using a template and the direct content has changed, so there's no need to update.
return false;
}
// If the changed template was not for the same mode as the current mode,
// then we should update the template if the mode for the currently used template
// is after the mode for the changed template in the fallback list.
if (this.Mode == DataFormMode.ReadOnly)
{
// If we're in read-only mode, the fallback mechanism is edit -> add-new.
return
(currentlyUsedTemplateMode == DataFormMode.Edit && changedTemplateMode == DataFormMode.Edit) ||
currentlyUsedTemplateMode == DataFormMode.AddNew;
}
else if (this.Mode == DataFormMode.Edit)
{
// If we're in edit mode, the fallback mechanism is add-new -> read-only.
return
(currentlyUsedTemplateMode == DataFormMode.AddNew && changedTemplateMode == DataFormMode.AddNew) ||
currentlyUsedTemplateMode == DataFormMode.ReadOnly;
}
else if (this.Mode == DataFormMode.AddNew)
{
// If we're in add-new mode, the fallback mechanism is edit -> read-only.
return
(currentlyUsedTemplateMode == DataFormMode.Edit && changedTemplateMode == DataFormMode.Edit) ||
currentlyUsedTemplateMode == DataFormMode.ReadOnly;
}
return false;
}
/// <summary>
/// 'Add' button is hit
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void itemDataForm_AddingNewItem(object sender, DataFormAddingNewItemEventArgs e)
{
editMode = DataFormMode.AddNew;
}
/// <summary>
/// "Edit" button is hit
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void itemDataForm_BeginningEdit(object sender, System.ComponentModel.CancelEventArgs e)
{
editMode = DataFormMode.Edit;
}
/// <summary>
/// Constructs a new instance of DataFormContentLoadEventArgs.
/// </summary>
/// <param name="content">The content that was loaded or will be loaded.</param>
/// <param name="mode">The mode of the DataForm.</param>
public DataFormContentLoadEventArgs(FrameworkElement content, DataFormMode mode)
{
this.Content = content;
this.Mode = mode;
}
// Executes when the user navigates to this page.
protected override void OnNavigatedTo(NavigationEventArgs e)
{
this.editMode = DataFormMode.ReadOnly;
this.ContentPageCtx = ModelProvider.Instance.GetContentPageContext(e.Uri.ToString());
this.BeginUpdateEntireUI();
}
/// <summary>
/// Thread body
/// </summary>
/// <param name="state"></param>
private void StartWork(object state)
{
MediaView mediaView = state as MediaView;
media savedMedia = null;
media theMedia = new media();
mediaView.Merge(theMedia, editMode);
// Save to backend
if (this.editMode == DataFormMode.Edit)
{
// Edit mode
AutoResetEvent nextOneAutoResetEvent = new AutoResetEvent(false);
EventHandler <save_MediaCompletedEventArgs> h1 = (s, e) =>
{
// TODO: handle error from server side
savedMedia = e.Result;
nextOneAutoResetEvent.Set();
};
Globals.WSClient.save_MediaCompleted += h1;
Globals.WSClient.save_MediaAsync(theMedia);
nextOneAutoResetEvent.WaitOne();
Globals.WSClient.save_MediaCompleted -= h1;
}
else
{
//
// Add new mode
//
// Get file content
byte[] content = ShopproHelper.ReadFully(fileInfo.OpenRead());
// Save to the backend
AutoResetEvent nextOneAutoResetEvent = new AutoResetEvent(false);
EventHandler <createNew_MediaCompletedEventArgs> h3 = (s, e) =>
{
// TODO: handle error from server side
savedMedia = e.Result;
nextOneAutoResetEvent.Set();
};
Globals.WSClient.createNew_MediaCompleted += h3;
Globals.WSClient.createNew_MediaAsync(theMedia, content);
nextOneAutoResetEvent.WaitOne();
Globals.WSClient.createNew_MediaCompleted -= h3;
}
// Check return result. If failure, savedCategory will be null
if (savedMedia != null)
{
this.Dispatcher.BeginInvoke(delegate()
{
mediaView.Restore(new MediaView(savedMedia));
});
}
else
{
// Show error message
ShopproHelper.ShowMessageWindow(this, "Error", "Fail to save this entry.", false);
// Back to readonly mode
this.Dispatcher.BeginInvoke(delegate()
{
// Restore cached UI data
mediaView.CancelEdit();
this.mediaDataForm.CancelEdit();
});
}
// No unsaved item
this.editMode = DataFormMode.ReadOnly;
this.fileInfo = null;
// Hide busy indicator
ShopproHelper.HideBusyIndicator(this);
// Go to original page if necessary
if (this.ContentPageCtx.GotoAddNewPage)
{
ShopproHelper.GoToContentPage(this, PageEnum.MediaListPage);
}
}