/// <summary>
/// Retrieves the saved scroll offset from the state dictionary and creates a delegate to
/// restore the scroll position on the page's first render.
/// </summary>
/// <param name="state"></param>
/// <param name="scrollViewer"></param>
public static void RestoreState(this PhoneApplicationPage page, ScrollViewer scrollViewer)
{
double offset = page.TryGetStateValue <double>(scrollViewer.Name + "_HorizontalOffset", 0);
if (offset > 0)
{
ScheduleOnNextRender(delegate { scrollViewer.ScrollToHorizontalOffset(offset); });
}
offset = page.TryGetStateValue <double>(scrollViewer.Name + "_VerticalOffset", 0);
if (offset > 0)
{
ScheduleOnNextRender(delegate { scrollViewer.ScrollToVerticalOffset(offset); });
}
}
/// <summary>
/// Retrieves the name of the control that should have focus and creates a delegate to
/// restore the scroll position on the page's first render.
/// </summary>
/// <param name="state">The calling page's state dictionary.</param>
/// <param name="parent">The parent element for which focus is being restored.</param>
public static void RestoreFocusState(this PhoneApplicationPage page, FrameworkElement parent)
{
// Get the name of the control that should have focus.
string focusedName = page.TryGetStateValue <string>("FocusedElementName", null);
// Check to see if the name is null or empty
if (!String.IsNullOrEmpty(focusedName))
{
// Find the control name in the parent.
Control focusedControl = parent.FindName(focusedName) as Control;
if (focusedControl != null)
{
// If the control is found, schedule a call to its Focus method for the next render.
ScheduleOnNextRender(delegate { focusedControl.Focus(); });
}
}
}
/// <summary>
/// Restores the value of a Slider from the page's state dictionary.
/// </summary>
/// <param name="state">The calling page's state dictionary.</param>
/// <param name="slider">The Slider to be restored.</param>
/// <param name="defaultValue">A default value that is used if the saved value cannot be retrieved.</param>
public static void RestoreState(this PhoneApplicationPage page, Slider slider, double defaultValue)
{
slider.Value = page.TryGetStateValue <double>(slider.Name + "_Value", defaultValue);
}
/// <summary>
/// Restores the checked state of a CheckBox from the page's state dictionary.
/// </summary>
/// <param name="state">The calling page's state dictionary.</param>
/// <param name="checkBox">The CheckBox to be restored.</param>
/// <param name="defaultValue">A default value that is used if the saved value cannot be retrieved.</param>
public static void RestoreState(this PhoneApplicationPage page, CheckBox checkBox, bool defaultValue)
{
checkBox.IsChecked = page.TryGetStateValue <bool>(checkBox.Name + "_IsChecked", defaultValue);
}
/// <summary>
/// Restores the contents and selection location of a TextBox from the page's state dictionary.
/// </summary>
/// <param name="state">The calling page's state dictionary.</param>
/// <param name="textBox">The TextBox to be restored.</param>
/// <param name="defaultValue">A default value that is used if the saved value cannot be retrieved.</param>
public static void RestoreState(this PhoneApplicationPage page, TextBox textBox, string defaultValue)
{
textBox.Text = page.TryGetStateValue <string>(textBox.Name + "_Text", defaultValue);
textBox.SelectionStart = page.TryGetStateValue <int>(textBox.Name + "_SelectionStart", textBox.Text.Length);
textBox.SelectionLength = page.TryGetStateValue <int>(textBox.Name + "_SelectionLength", 0);
}
public static void RestoreState(this PhoneApplicationPage page, Pivot pivot, int defaultIndex)
{
pivot.SelectedIndex = page.TryGetStateValue <int>(pivot.Name + "_SelectedIndex", defaultIndex);
}
/// <summary>
/// Restores the checked state of a RadioButton from the page's state dictionary.
/// </summary>
/// <param name="state">The calling page's state dictionary.</param>
/// <param name="radioButton">The RadioButton to be restored.</param>
/// <param name="defaultValue">A default value that is used if the saved value cannot be retrieved.</param>
public static void RestoreState(this PhoneApplicationPage page, RadioButton radioButton, bool defaultValue)
{
radioButton.IsChecked = page.TryGetStateValue <bool>(radioButton.Name + "_IsChecked", defaultValue);
}