private void tabButtonSelectedHandler(object sender, TabButtonSelectedEventArgs args)
{
if ((content != null) && (content.ViewCount > args.Index))
{
content.Select(args.Index);
}
}
protected internal void RemoveTabButton(TabButton tabButton)
{
if (tabButton == null)
{
throw new ArgumentNullException(nameof(tabButton), "tabButton should not be null.");
}
if (tabButtons.Contains(tabButton) == false)
{
throw new ArgumentException("tabButton does not exist in TabBar.", nameof(tabButton));
}
int index = tabButtons.IndexOf(tabButton);
TabButton selectedTabButton = tabButtons[SelectedIndex];
tabButtons.Remove(tabButton);
Remove(tabButton);
tabButtonGroup.Remove(tabButton);
if ((index < SelectedIndex) || (tabButtons.Count == SelectedIndex))
{
SelectedIndex -= 1;
if (TabButtonSelected != null)
{
TabButtonSelectedEventArgs args = new TabButtonSelectedEventArgs(SelectedIndex);
TabButtonSelected(this, args);
}
}
if ((SelectedIndex != -1) && (selectedTabButton != tabButtons[SelectedIndex]))
{
tabButtons[SelectedIndex].IsSelected = true;
}
}
protected internal void AddTabButton(TabButton tabButton)
{
if (tabButton == null)
{
throw new ArgumentNullException(nameof(tabButton), "tabButton should not be null.");
}
tabButtons.Add(tabButton);
Add(tabButton);
tabButtonGroup.Add(tabButton);
tabButton.Clicked += (object sender, ClickedEventArgs e) =>
{
int index = tabButtons.IndexOf(tabButton);
if (SelectedIndex == index)
{
return;
}
SelectedIndex = index;
if (TabButtonSelected != null)
{
TabButtonSelectedEventArgs args = new TabButtonSelectedEventArgs(SelectedIndex);
TabButtonSelected(this, args);
}
};
if (SelectedIndex == -1)
{
tabButton.IsSelected = true;
tabButton.SetTabButtonState(ControlState.Pressed);
SelectedIndex = 0;
if (TabButtonSelected != null)
{
TabButtonSelectedEventArgs args = new TabButtonSelectedEventArgs(SelectedIndex);
TabButtonSelected(this, args);
}
}
//TODO: To support non-unified tab button size.
CalculateUnifiedTabButtonSize();
}
protected internal void AddTabButton(TabButton tabButton)
{
if (tabButton == null)
{
throw new ArgumentNullException(nameof(tabButton), "tabButton should not be null.");
}
tabButtons.Add(tabButton);
Add(tabButton);
tabButtonGroup.Add(tabButton);
tabButton.Clicked += (object sender, ClickedEventArgs e) =>
{
int index = tabButtons.IndexOf(tabButton);
if (SelectedIndex == index)
{
return;
}
SelectedIndex = index;
if (TabButtonSelected != null)
{
TabButtonSelectedEventArgs args = new TabButtonSelectedEventArgs(SelectedIndex);
TabButtonSelected(this, args);
}
};
if (SelectedIndex == -1)
{
tabButton.IsSelected = true;
SelectedIndex = 0;
if (TabButtonSelected != null)
{
TabButtonSelectedEventArgs args = new TabButtonSelectedEventArgs(SelectedIndex);
TabButtonSelected(this, args);
}
}
}
protected internal void RemoveTabButton(TabButton tabButton)
{
if (tabButton == null)
{
throw new ArgumentNullException(nameof(tabButton), "tabButton should not be null.");
}
if (tabButtons.Contains(tabButton) == false)
{
throw new ArgumentException("tabButton does not exist in TabBar.", nameof(tabButton));
}
int index = tabButtons.IndexOf(tabButton);
TabButton selectedTabButton = tabButtons[SelectedIndex];
tabButtons.Remove(tabButton);
Remove(tabButton);
tabButtonGroup.Remove(tabButton);
if ((index < SelectedIndex) || (tabButtons.Count == SelectedIndex))
{
SelectedIndex -= 1;
if (TabButtonSelected != null)
{
TabButtonSelectedEventArgs args = new TabButtonSelectedEventArgs(SelectedIndex);
TabButtonSelected(this, args);
}
}
if ((SelectedIndex != -1) && (selectedTabButton != tabButtons[SelectedIndex]))
{
tabButtons[SelectedIndex].IsSelected = true;
tabButtons[SelectedIndex].SetTabButtonState(ControlState.Pressed);
}
//TODO: To support non-unified tab button size.
CalculateUnifiedTabButtonSize();
}