protected override void OnElementChanged(ElementChangedEventArgs <Button> e)
{
base.OnElementChanged(e);
if (Control == null)
{
return;
}
if (e?.OldElement != null)
{
_helper.Clean();
}
if (e?.NewElement == null)
{
return;
}
_materialButton = (MaterialButton)Element;
_helper = new MaterialDrawableHelper(_materialButton, Control);
_helper.UpdateDrawable();
Control.SetMinimumWidth((int)MaterialHelper.ConvertDpToPx(64));
Control.SetAllCaps(_materialButton != null && _materialButton.AllCaps);
Control.SetMaxLines(1);
SetTextColors();
}
public override void GetOutline(Android.Views.View view, Outline outline)
{
var inset = (int)MaterialHelper.ConvertDpToPx(6);
var cornerRadius = (int)MaterialHelper.ConvertDpToPx(_cornerRadius);
outline.SetRoundRect(inset, inset, view.Width - inset, view.Height - inset, cornerRadius);
}
private void UpdateStrokeColor()
{
var borderColor = _materialCard.BorderColor.IsDefault ? _materialCard.BackgroundColor : _materialCard.BorderColor;
var drawable = (GradientDrawable)Control.Background;
drawable.SetStroke((int)MaterialHelper.ConvertDpToPx(1), borderColor.ToAndroid());
}
private void UpdateBorderWidth()
{
if (_button.ButtonType == MaterialButtonType.Text)
{
_borderWidth = 0;
return;
}
_borderWidth = (int)MaterialHelper.ConvertDpToPx(_button.BorderWidth);
}
private void SetControl()
{
if (Control == null)
{
return;
}
Control.Background = new ColorDrawable(Color.Transparent.ToAndroid());
Control.SetPadding(0, 0, 0, 0);
Control.SetIncludeFontPadding(false);
Control.SetMinimumHeight((int)MaterialHelper.ConvertDpToPx(20));
var layoutParams = new MarginLayoutParams(Control.LayoutParameters);
layoutParams.SetMargins(0, 0, 0, 0);
Control.LayoutParameters = layoutParams;
}
private void SetControl()
{
if (Control == null)
{
return;
}
Control.Background = new ColorDrawable(Color.Transparent.ToAndroid());
Control.SetPadding(0, 0, 0, 0);
Control.SetIncludeFontPadding(false);
Control.SetMinimumHeight((int)MaterialHelper.ConvertDpToPx(20));
//// DEV HINT: This will be used for the future control `MaterialTextArea`.
//// This removes the 'Next' button and shows a 'Done' button when the device's orientation is in landscape.
//// This prevents the crash that is caused by a `java.lang.IllegalStateException'.
//// Reported here https://github.com/xamarin/Xamarin.Forms/issues/4832.
//this.Control.ImeOptions = Android.Views.InputMethods.ImeAction.Done;
}
private StateListAnimator CreateStateListAnimator()
{
if (_button.ButtonType != MaterialButtonType.Elevated || !_aView.Enabled)
{
return(null);
}
var stateListAnimator = new StateListAnimator();
var objAnimTransZEnabled = ObjectAnimator.OfFloat(_aView, "translationZ", MaterialHelper.ConvertDpToPx(_button.Elevation.RestingElevation))
.SetDuration(100);
objAnimTransZEnabled.StartDelay = 100;
var objAnimElevationEnabled = ObjectAnimator.OfFloat(_aView, "elevation", MaterialHelper.ConvertDpToPx(_button.Elevation.RestingElevation))
.SetDuration(0);
var objAnimTransZPressed = ObjectAnimator.OfFloat(_aView, "translationZ", MaterialHelper.ConvertDpToPx(_button.Elevation.PressedElevation))
.SetDuration(100);
var objAnimElevationPressed = ObjectAnimator.OfFloat(_aView, "elevation", MaterialHelper.ConvertDpToPx(_button.Elevation.RestingElevation))
.SetDuration(0);
var b = new AnimatorSet();
b.PlayTogether(objAnimTransZEnabled, objAnimElevationEnabled);
b.SetTarget(_aView);
var bb = new AnimatorSet();
bb.PlayTogether(objAnimTransZPressed, objAnimElevationPressed);
bb.SetTarget(_aView);
stateListAnimator.AddState(new[] { R.Attribute.StatePressed }, bb);
stateListAnimator.AddState(new[] { R.Attribute.StateFocused, R.Attribute.StateEnabled }, bb);
stateListAnimator.AddState(new[] { R.Attribute.StateEnabled }, b);
stateListAnimator.AddState(new[] { R.Attribute.StateFocused }, bb);
if (!(_aView is AppCompatImageButton))
{
return(stateListAnimator);
}
_aView.OutlineProvider = new MaterialOutlineProvider(_button.CornerRadius);
_aView.ClipToOutline = false;
return(stateListAnimator);
}
private void UpdateCornerRadius()
{
_cornerRadius = (int)MaterialHelper.ConvertDpToPx(_button.CornerRadius);
}