protected override void OnElementChanged(ElementChangedEventArgs<Xamarin.Forms.Button> e)
{
base.OnElementChanged(e);
if (e.OldElement == null)
{
androidButton = (global::Android.Widget.Button)Control;
formsElement = (CustomImageButton)this.Element;
androidButton.SetPadding(20, 20, 20, 20);
androidButton.SetAllCaps(false);
if (formsElement.ImageName != null)
androidButton.SetBackgroundDrawable(Context.Resources.GetDrawable(formsElement.ImageName));
if (formsElement.TextOrientation != null)
{
if (Convert.ToString(formsElement.TextOrientation) == "Left")
{
androidButton.Gravity = Android.Views.GravityFlags.Left;
}
else if (Convert.ToString(formsElement.TextOrientation) == "Right")
{
androidButton.Gravity = Android.Views.GravityFlags.Right;
}
else
{
androidButton.Gravity = Android.Views.GravityFlags.Center;
}
}
}
}
public float ButtonTextSize(string text, double fontSize)
{
if (_button == null) {
_button = new global::Android.Widget.Button(Forms.Context);
// _button.SetPadding(10, _button.PaddingTop, 10, _button.PaddingBottom);
_button.SetPadding(0, _button.PaddingTop, 0, _button.PaddingBottom);
}
if (fontSize != 0)
{
_button.TextSize = (float)fontSize;
}
var widgetPadding = 8;
var bounds = new Rect();
_button.Text = text;
_button.Paint.GetTextBounds(text, 0, text.Length, bounds);
// Add two times the widgetPadding of 8 dp, because the button has this min size and than resize to the next multi of 8.
// http://developer.android.com/guide/practices/ui_guidelines/widget_design.html
return (float)Math.Ceiling((bounds.Width() / Resources.System.DisplayMetrics.Density + _button.PaddingLeft + _button.PaddingRight + 2 * widgetPadding) / 8) * 8;
}