private void MainPage_Loaded(object sender, RoutedEventArgs e)
{
TraceHelper.AddMessage("Main: Loaded");
// if data isn't loaded from storage yet, load the app data
if (!App.ViewModel.IsDataLoaded)
{
// Load app data from local storage (user creds, about tab data, constants, list types, tasklists, etc)
App.ViewModel.LoadData();
}
// if haven't synced with web service yet, try now
if (initialSync == false)
{
// attempt to sync with the Service
App.ViewModel.SyncWithService();
initialSync = true;
}
taskList = new TaskList() { Tasks = FilterTasks(App.ViewModel.Tasks) };
// create the TaskListHelper
TaskListHelper = new TaskStoreWinPhone.TaskListHelper(
taskList,
new RoutedEventHandler(Tasks_CompleteCheckbox_Click),
new RoutedEventHandler(Tag_HyperlinkButton_Click));
// store the current listbox and ordering
TaskListHelper.ListBox = TasksListBox;
TaskListHelper.OrderBy = "due";
// render the tasks
TaskListHelper.RenderList(taskList);
// add a property changed handler for the Tasks property
if (!addedTasksPropertyChangedHandler)
{
App.ViewModel.PropertyChanged += new PropertyChangedEventHandler((s, args) =>
{
// if the Tasks property was signaled, re-filter and re-render the tasks list
if (args.PropertyName == "Tasks")
{
taskList.Tasks = FilterTasks(App.ViewModel.Tasks);
TaskListHelper.RenderList(taskList);
}
});
addedTasksPropertyChangedHandler = true;
}
// set the datacontext
SearchHeader.DataContext = this;
// trace exit
TraceHelper.AddMessage("Exiting Main Loaded");
}
// When page is navigated to set data context to selected item in listType
protected override void OnNavigatedTo(NavigationEventArgs e)
{
// trace data
TraceHelper.AddMessage("List: OnNavigatedTo");
string IDString = "";
string typeString = "";
Guid id;
if (NavigationContext.QueryString.TryGetValue("type", out typeString) == false)
{
// trace page navigation
TraceHelper.StartMessage("List: Navigate back");
// navigate back
NavigationService.GoBack();
return;
}
switch (typeString)
{
case "TaskList":
if (NavigationContext.QueryString.TryGetValue("ID", out IDString) == false)
{
// trace page navigation
TraceHelper.StartMessage("List: Navigate back");
// navigate back
NavigationService.GoBack();
return;
}
id = new Guid(IDString);
// get the tasklist and make it the datacontext
try
{
taskList = App.ViewModel.LoadList(id);
// if the load failed, this list has been deleted
if (taskList == null)
{
// the list isn't found - this can happen when the list we were just
// editing was removed in TaskListEditor, which then goes back to TaskListPage.
// this will send us back to the MainPage which is appropriate.
// trace page navigation
TraceHelper.StartMessage("List: Navigate back");
// navigate back
NavigationService.GoBack();
return;
}
}
catch (Exception ex)
{
// the list isn't found - this can happen when the list we were just
// editing was removed in TaskListEditor, which then goes back to TaskListPage.
// this will send us back to the MainPage which is appropriate.
// trace page navigation
TraceHelper.StartMessage(String.Format("List: Navigate back (exception: {0})", ex.Message));
// navigate back
NavigationService.GoBack();
return;
}
break;
case "Tag":
if (NavigationContext.QueryString.TryGetValue("ID", out IDString) == false)
{
// trace page navigation
TraceHelper.StartMessage("List: Navigate back");
// navigate back
NavigationService.GoBack();
return;
}
id = new Guid(IDString);
// create a filter
try
{
tag = App.ViewModel.Tags.Single(t => t.ID == id);
taskList = new TaskList()
{
ID = Guid.Empty,
Name = String.Format("tasks with {0} tag", tag.Name),
Tasks = App.ViewModel.Tasks.Where(t => t.TaskTags.Any(tg => tg.TagID == tag.ID)).ToObservableCollection()
};
}
catch (Exception)
{
// the tag isn't found - this can happen when the tag we were just
// editing was removed in TagListEditor, which then goes back to TaskListPage.
// this will send us back to the MainPage which is appropriate.
// trace page navigation
TraceHelper.StartMessage("List: Navigate back");
// navigate back
NavigationService.GoBack();
return;
}
break;
default:
// trace page navigation
TraceHelper.StartMessage("List: Navigate back");
// navigate back
NavigationService.GoBack();
return;
}
// set datacontext
DataContext = taskList;
// create the TaskListHelper
TaskListHelper = new TaskStoreWinPhone.TaskListHelper(
taskList,
new RoutedEventHandler(CompleteCheckbox_Click),
new RoutedEventHandler(Tag_HyperlinkButton_Click));
// store the current listbox and ordering
PivotItem item = (PivotItem) PivotControl.Items[PivotControl.SelectedIndex];
TaskListHelper.ListBox = (ListBox)((Grid)item.Content).Children[1];
TaskListHelper.OrderBy = (string)item.Header;
// trace data
TraceHelper.AddMessage("Exiting List OnNavigatedTo");
}
