/// <summary>
/// Invokes the specified button handler.
/// </summary>
private void InvokeHandler(MessagePopupButtonHandler handler, object state)
{
if (handler != null)
{
try
{
handler(this, state);
}
catch (Exception) { }
}
}
/// <summary>
/// Called when a button of the message popup is clicked.
/// </summary>
private void OnButtonClicked(MessagePopupButtonHandler handler, object state)
{
InvokeHandler(handler, state);
Close();
}
public void AddCancelHandler(MessagePopupButtonHandler handler)
{
_cancelHandler = handler;
}
/// <summary>
/// Adds a cancel button to the message popup.
/// </summary>
/// <remarks>
/// A <see cref="MessagePopup"/> instance can have at most one cancel button.
/// If one is present, its handler will be called when the user presses the Back key on the device
/// while the message popup is open.
/// If there is no cancel button, the message popup does not intercept Back key presses.
/// </remarks>
/// <param name="label">The label of the button.</param>
/// <param name="handler">The delegate method that will be called when the button is clicked
/// or when the user presses the Back key.</param>
/// <param name="state">The state object sent to <paramref name="handler"/> when the button is clicked
/// or when the user presses the Back key.</param>
/// <exception cref="InvalidOperationException">If the message popup already has a cancel button.</exception>
public void AddCancelButton(string label, MessagePopupButtonHandler handler, object state)
{
if (_hasCancelButton)
{
throw new InvalidOperationException();
}
_hasCancelButton = true;
_cancelHandler = handler;
_cancelState = state;
AddButton(label, handler, state);
}
/// <summary>
/// Adds a button to the message popup.
/// </summary>
/// <param name="label">The label of the button.</param>
/// <param name="handler">The delegate method that will be called when the button is clicked (null allowed).</param>
/// <param name="state">The state object sent to <paramref name="handler"/> when the button is clicked.</param>
public void AddButton(string label, MessagePopupButtonHandler handler, object state)
{
int row = (_content.ButtonsGrid.Children.Count / 2);
int column = (_content.ButtonsGrid.Children.Count % 2);
while (_content.ButtonsGrid.RowDefinitions.Count <= row)
{
_content.ButtonsGrid.RowDefinitions.Add(new RowDefinition() { Height = GridLength.Auto });
}
Button button = new Button();
button.Content = label;
button.Style = Application.Current.Resources["WSDOTButtonStyle"] as Style;
button.Click += (sender, e) => OnButtonClicked(handler, state);
Grid.SetRow(button, row);
Grid.SetColumn(button, column);
_content.ButtonsGrid.Children.Add(button);
}
/// <summary>
/// Adds a button to the message popup.
/// </summary>
/// <param name="label">The label of the button.</param>
/// <param name="handler">The delegate method that will be called when the button is clicked (null allowed).</param>
/// <param name="state">The state object sent to <paramref name="handler"/> when the button is clicked.</param>
public void AddButton(string label, MessagePopupButtonHandler handler, object state)
{
int row = (_content.ButtonsGrid.Children.Count / 2);
int column = (_content.ButtonsGrid.Children.Count % 2);
while (_content.ButtonsGrid.RowDefinitions.Count <= row)
{
_content.ButtonsGrid.RowDefinitions.Add(new RowDefinition() { Height = GridLength.Auto });
}
Button button = new Button();
button.Content = label;
button.FontSize = _content.MessageTextBlock.FontSize;
button.Click += (sender, e) => OnButtonClicked(handler, state);
Grid.SetRow(button, row);
Grid.SetColumn(button, column);
_content.ButtonsGrid.Children.Add(button);
}
