void SetTitlePosition(CustomNavigationPage.TitleAlignment alignment, Thickness padding, Thickness margin, CGRect vFrame)
{
var marginX = margin.Top;
var marginY = margin.Left;
var marginWidth = margin.Left + margin.Right;
var marginHeight = margin.Top + margin.Bottom;
var paddingWidth = padding.Left + padding.Right;
var paddingHeight = padding.Top + padding.Bottom;
var paddingX = padding.Left;
var paddingY = padding.Top;
if (CustomNavigationPage.GetTitleBackground(Element) != null && vFrame.Width == 0 && vFrame.Height == 0)
{
vFrame = titleView.Frame;
}
marginView.Frame = new CGRect(vFrame.X, vFrame.Y, vFrame.Width, vFrame.Height);
double offset = 0;
titleLabel.AutoresizingMask = UIViewAutoresizing.All;
switch (alignment)
{
case CustomNavigationPage.TitleAlignment.Start:
marginView.Frame = new CGRect(vFrame.X, marginView.Frame.Y, marginView.Bounds.Width + marginWidth + paddingWidth, marginView.Bounds.Height + marginHeight + paddingHeight);
var startCenter = marginView.Center;
startCenter.Y = marginView.Superview.Center.Y;
marginView.Center = startCenter;
titleLabel.TextAlignment = UITextAlignment.Left;
subtitleLabel.TextAlignment = UITextAlignment.Left;
offset = marginX;
break;
case CustomNavigationPage.TitleAlignment.Center:
offset = marginX;
marginView.Frame = new CGRect(marginView.Frame.X, marginView.Frame.Y, marginView.Bounds.Width + marginWidth + paddingWidth, marginView.Bounds.Height + marginHeight + paddingHeight);
marginView.Center = marginView.Superview.Center;
titleLabel.TextAlignment = UITextAlignment.Center;
subtitleLabel.TextAlignment = UITextAlignment.Center;
break;
case CustomNavigationPage.TitleAlignment.End:
var endCenter = marginView.Center;
endCenter.Y = marginView.Superview.Center.Y;
marginView.Center = endCenter;
titleLabel.TextAlignment = UITextAlignment.Right;
subtitleLabel.TextAlignment = UITextAlignment.Right;
marginView.Frame = new CGRect(marginView.Superview.Frame.Width - marginView.Frame.Width - offset - marginWidth - paddingWidth, marginView.Frame.Y, marginView.Bounds.Width + marginWidth + paddingWidth, marginView.Bounds.Height + marginHeight + paddingHeight);
offset = marginView.Frame.Width - vFrame.Width - paddingWidth - marginX;
break;
}
titleView.Frame = new CGRect(offset, vFrame.Y + marginY, vFrame.Width + paddingWidth, vFrame.Height + paddingHeight);
var cPage = Element as CustomPage;
if (cPage != null && (!string.IsNullOrEmpty(cPage.Subtitle) || (cPage.FormattedSubtitle != null && cPage.FormattedSubtitle.Spans.Count > 0)))
{
titleLabel.Frame = new CGRect(paddingX, paddingY, titleView.Frame.Width, titleLabel.IntrinsicContentSize.Height);
subtitleLabel.Frame = new CGRect(titleLabel.Frame.X, titleLabel.Frame.Y + titleLabel.Frame.Height + 3, titleView.Frame.Width, subtitleLabel.Frame.Height);
}
else
{
titleLabel.Frame = new CGRect(paddingX, paddingY, titleLabel.IntrinsicContentSize.Width, titleLabel.IntrinsicContentSize.Height);
}
}
void UpdateTitleViewLayoutAlignment(LinearLayout titleViewLayout, AppCompatTextView titleTextView, AppCompatTextView subTitleTextView, CustomNavigationPage.TitleAlignment alignment)
{
var titleViewParams = titleViewLayout.LayoutParameters as Android.Widget.FrameLayout.LayoutParams;
var titleTextViewParams = titleTextView.LayoutParameters as LinearLayout.LayoutParams;
var subTitleTextViewParams = subTitleTextView.LayoutParameters as LinearLayout.LayoutParams;
switch (alignment)
{
case CustomNavigationPage.TitleAlignment.Start:
titleViewParams.Gravity = GravityFlags.Start | GravityFlags.CenterVertical;
titleTextViewParams.Gravity = GravityFlags.Start;
subTitleTextViewParams.Gravity = GravityFlags.Start;
break;
case CustomNavigationPage.TitleAlignment.Center:
titleViewParams.Gravity = GravityFlags.Center;
titleTextViewParams.Gravity = GravityFlags.Center;
subTitleTextViewParams.Gravity = GravityFlags.Center;
break;
case CustomNavigationPage.TitleAlignment.End:
titleViewParams.Gravity = GravityFlags.End | GravityFlags.CenterVertical;
titleTextViewParams.Gravity = GravityFlags.End;
subTitleTextViewParams.Gravity = GravityFlags.End;
break;
}
titleViewLayout.LayoutParameters = titleViewParams;
}
void UpdateTitleViewLayoutAlignment(LinearLayout titleViewLayout, Android.Widget.TextView titleTextView, Android.Widget.TextView subTitleTextView, CustomNavigationPage.TitleAlignment alignment)
{
var titleViewParams = titleViewLayout.LayoutParameters as Android.Support.V7.App.ActionBar.LayoutParams;
var titleTextViewParams = titleTextView.LayoutParameters as LinearLayout.LayoutParams;
var subTitleTextViewParams = subTitleTextView.LayoutParameters as LinearLayout.LayoutParams;
var leftMenuParams = _leftMenuLayout.LayoutParameters as Android.Support.V7.App.ActionBar.LayoutParams;
var rightMenuParams = _rightMenuLayout.LayoutParameters as Android.Support.V7.App.ActionBar.LayoutParams;
switch (alignment)
{
case CustomNavigationPage.TitleAlignment.Start:
titleViewParams.Gravity = (int)GravityFlags.Start;
titleTextViewParams.Gravity = GravityFlags.Start;
subTitleTextViewParams.Gravity = GravityFlags.Start;
break;
case CustomNavigationPage.TitleAlignment.Center:
leftMenuParams.Gravity = (int)GravityFlags.Start;
rightMenuParams.Gravity = (int)GravityFlags.End;
rightMenuParams.MarginEnd = 20;
titleViewParams.Gravity = (int)GravityFlags.Center;
titleTextViewParams.Gravity = GravityFlags.Center;
subTitleTextViewParams.Gravity = GravityFlags.Center;
break;
case CustomNavigationPage.TitleAlignment.End:
titleViewParams.Gravity = (int)GravityFlags.End;
titleTextViewParams.Gravity = GravityFlags.End;
subTitleTextViewParams.Gravity = GravityFlags.End;
break;
}
titleViewLayout.LayoutParameters = titleViewParams;
}