protected override void OnElementChanged(ElementChangedEventArgs <Button> e)
{
base.OnElementChanged(e);
if (e.OldElement == null)
{
AButton button = Control;
if (button == null)
{
button = CreateNativeControl();
button.SetOnClickListener(ButtonClickListener.Instance.Value);
button.SetOnTouchListener(ButtonTouchListener.Instance.Value);
button.Tag = this;
SetNativeControl(button);
_textColorSwitcher = new TextColorSwitcher(button.TextColors);
button.AddOnAttachStateChangeListener(this);
}
}
else
{
if (_drawableEnabled)
{
_drawableEnabled = false;
_backgroundDrawable.Reset();
_backgroundDrawable = null;
}
}
UpdateAll();
}
public void Reset()
{
if (_drawableEnabled)
{
_drawableEnabled = false;
_backgroundDrawable?.Reset();
_backgroundDrawable = null;
}
}
public void UpdateDrawable()
{
if (_button == null || _nativeButton == null)
{
return;
}
if (_button.BackgroundColor == Color.Default)
{
if (!_drawableEnabled)
{
return;
}
if (_defaultDrawable != null)
{
_nativeButton.SetBackground(_defaultDrawable);
}
_drawableEnabled = false;
}
else
{
if (_backgroundDrawable == null)
{
_backgroundDrawable = new ButtonDrawable(_nativeButton.Context.ToPixels);
}
_backgroundDrawable.Button = _button;
if (_drawableEnabled)
{
return;
}
if (_defaultDrawable == null)
{
_defaultDrawable = _nativeButton.Background;
}
_nativeButton.SetBackground(_backgroundDrawable);
_drawableEnabled = true;
}
_nativeButton.Invalidate();
}
protected virtual void Dispose(bool disposing)
{
if (!_disposed)
{
if (disposing)
{
_backgroundDrawable?.Dispose();
_backgroundDrawable = null;
_defaultDrawable?.Dispose();
_defaultDrawable = null;
if (_button != null)
{
_button.PropertyChanged -= ButtonPropertyChanged;
_button = null;
}
_nativeButton = null;
}
_disposed = true;
}
}
protected override void Dispose(bool disposing)
{
if (_isDisposed)
{
return;
}
_isDisposed = true;
if (disposing)
{
if (_backgroundDrawable != null)
{
_backgroundDrawable.Dispose();
_backgroundDrawable = null;
}
}
base.Dispose(disposing);
}
void UpdateDrawable()
{
if (Element.BackgroundColor == Color.Default)
{
if (!_drawableEnabled)
{
return;
}
if (_defaultDrawable != null)
{
Control.SetBackground(_defaultDrawable);
}
_drawableEnabled = false;
}
else
{
if (_backgroundDrawable == null)
{
_backgroundDrawable = new ButtonDrawable();
}
_backgroundDrawable.Button = Element;
if (_drawableEnabled)
{
return;
}
if (_defaultDrawable == null)
{
_defaultDrawable = Control.Background;
}
Control.SetBackground(_backgroundDrawable);
_drawableEnabled = true;
}
Control.Invalidate();
}
public void UpdateDrawable()
{
if (_button == null || _nativeButton == null)
{
return;
}
bool cornerRadiusIsDefault = !_button.IsSet(Button.CornerRadiusProperty) || (_button.CornerRadius == (int)Button.CornerRadiusProperty.DefaultValue || _button.CornerRadius == ButtonDrawable.DefaultCornerRadius);
bool backgroundColorIsDefault = !_button.IsSet(VisualElement.BackgroundColorProperty) || _button.BackgroundColor == (Color)VisualElement.BackgroundColorProperty.DefaultValue;
bool borderColorIsDefault = !_button.IsSet(Button.BorderColorProperty) || _button.BorderColor == (Color)Button.BorderColorProperty.DefaultValue;
bool borderWidthIsDefault = !_button.IsSet(Button.BorderWidthProperty) || _button.BorderWidth == (double)Button.BorderWidthProperty.DefaultValue;
if (backgroundColorIsDefault &&
cornerRadiusIsDefault &&
borderColorIsDefault &&
borderWidthIsDefault)
{
if (!_drawableEnabled)
{
return;
}
if (_defaultDrawable != null)
{
_nativeButton.SetBackground(_defaultDrawable);
}
_drawableEnabled = false;
}
else
{
if (_backgroundDrawable == null)
{
_backgroundDrawable = new ButtonDrawable(_nativeButton.Context.ToPixels, Forms.GetColorButtonNormal(_nativeButton.Context));
}
_backgroundDrawable.Button = _button;
var useDefaultPadding = _button.OnThisPlatform().UseDefaultPadding();
int paddingTop = useDefaultPadding ? _nativeButton.PaddingTop : 0;
int paddingLeft = useDefaultPadding ? _nativeButton.PaddingLeft : 0;
var useDefaultShadow = _button.OnThisPlatform().UseDefaultShadow();
float shadowRadius = useDefaultShadow ? 2 : _nativeButton.ShadowRadius;
float shadowDx = useDefaultShadow ? 0 : _nativeButton.ShadowDx;
float shadowDy = useDefaultShadow ? 4 : _nativeButton.ShadowDy;
AColor shadowColor = useDefaultShadow ? _backgroundDrawable.PressedBackgroundColor.ToAndroid() : _nativeButton.ShadowColor;
_backgroundDrawable.SetPadding(paddingTop, paddingLeft)
.SetShadow(shadowDy, shadowDx, shadowColor, shadowRadius);
if (_drawableEnabled)
{
return;
}
if (_defaultDrawable == null)
{
_defaultDrawable = _nativeButton.Background;
}
if (Forms.IsLollipopOrNewer)
{
var rippleColor = _backgroundDrawable.PressedBackgroundColor.ToAndroid();
_rippleDrawable = new RippleDrawable(ColorStateList.ValueOf(rippleColor), _backgroundDrawable, null);
_nativeButton.SetBackground(_rippleDrawable);
}
else
{
_nativeButton.SetBackground(_backgroundDrawable);
}
_drawableEnabled = true;
}
_nativeButton.Invalidate();
}
public void UpdateDrawable()
{
if (_button == null || _nativeButton == null)
{
return;
}
bool cornerRadiusIsDefault = !_button.IsSet(Button.CornerRadiusProperty) || (_button.CornerRadius == (int)Button.CornerRadiusProperty.DefaultValue || _button.CornerRadius == ButtonDrawable.DefaultCornerRadius);
bool backgroundColorIsDefault = !_button.IsSet(VisualElement.BackgroundColorProperty) || _button.BackgroundColor == (Color)VisualElement.BackgroundColorProperty.DefaultValue;
bool borderColorIsDefault = !_button.IsSet(Button.BorderColorProperty) || _button.BorderColor == (Color)Button.BorderColorProperty.DefaultValue;
bool borderWidthIsDefault = !_button.IsSet(Button.BorderWidthProperty) || _button.BorderWidth == (double)Button.BorderWidthProperty.DefaultValue;
if (backgroundColorIsDefault &&
cornerRadiusIsDefault &&
borderColorIsDefault &&
borderWidthIsDefault)
{
if (!_drawableEnabled)
{
return;
}
if (_defaultDrawable != null)
{
_nativeButton.SetBackground(_defaultDrawable);
}
_drawableEnabled = false;
}
else
{
if (_backgroundDrawable == null)
{
_backgroundDrawable = new ButtonDrawable(_nativeButton.Context.ToPixels, Forms.GetColorButtonNormal(_nativeButton.Context));
}
_backgroundDrawable.Button = _button;
var useDefaultPadding = _button.OnThisPlatform().UseDefaultPadding();
int paddingTop = useDefaultPadding ? _nativeButton.PaddingTop : 0;
int paddingLeft = useDefaultPadding ? _nativeButton.PaddingLeft : 0;
var useDefaultShadow = _button.OnThisPlatform().UseDefaultShadow();
// Use no shadow by default for API < 16
float shadowRadius = 0;
float shadowDy = 0;
float shadowDx = 0;
AColor shadowColor = Color.Transparent.ToAndroid();
// Add Android's default material shadow if we want it
if (useDefaultShadow)
{
shadowRadius = 2;
shadowDy = 4;
shadowDx = 0;
shadowColor = _backgroundDrawable.PressedBackgroundColor.ToAndroid();
}
// Otherwise get values from the control (but only for supported APIs)
else if ((int)Build.VERSION.SdkInt >= 16)
{
shadowRadius = _nativeButton.ShadowRadius;
shadowDy = _nativeButton.ShadowDy;
shadowDx = _nativeButton.ShadowDx;
shadowColor = _nativeButton.ShadowColor;
}
_backgroundDrawable.SetPadding(paddingTop, paddingLeft)
.SetShadow(shadowDy, shadowDx, shadowColor, shadowRadius);
if (_drawableEnabled)
{
return;
}
if (_defaultDrawable == null)
{
_defaultDrawable = _nativeButton.Background;
}
if (Forms.IsLollipopOrNewer)
{
var rippleColor = _backgroundDrawable.PressedBackgroundColor.ToAndroid();
_rippleDrawable = new RippleDrawable(ColorStateList.ValueOf(rippleColor), _backgroundDrawable, null);
_nativeButton.SetBackground(_rippleDrawable);
}
else
{
_nativeButton.SetBackground(_backgroundDrawable);
}
_drawableEnabled = true;
}
_nativeButton.Invalidate();
}
public void UpdateDrawable()
{
if (_button == null || _nativeButton == null)
{
return;
}
bool cornerRadiusIsDefault = !_button.IsSet(Button.CornerRadiusProperty) || (_button.CornerRadius == (int)Button.CornerRadiusProperty.DefaultValue || _button.CornerRadius == ButtonDrawable.DefaultCornerRadius);
bool backgroundColorIsDefault = !_button.IsSet(VisualElement.BackgroundColorProperty) || _button.BackgroundColor == (Color)VisualElement.BackgroundColorProperty.DefaultValue;
bool borderColorIsDefault = !_button.IsSet(Button.BorderColorProperty) || _button.BorderColor == (Color)Button.BorderColorProperty.DefaultValue;
bool borderWidthIsDefault = !_button.IsSet(Button.BorderWidthProperty) || _button.BorderWidth == (double)Button.BorderWidthProperty.DefaultValue;
if (backgroundColorIsDefault &&
cornerRadiusIsDefault &&
borderColorIsDefault &&
borderWidthIsDefault)
{
if (!_drawableEnabled)
{
return;
}
if (_defaultDrawable != null)
{
_nativeButton.SetBackground(_defaultDrawable);
}
_drawableEnabled = false;
}
else
{
if (_backgroundDrawable == null)
{
_backgroundDrawable = new ButtonDrawable(_nativeButton.Context.ToPixels, Forms.GetColorButtonNormal(_nativeButton.Context));
}
_backgroundDrawable.Button = _button;
_backgroundDrawable.SetPaddingTop(_nativeButton.PaddingTop);
if (_drawableEnabled)
{
return;
}
if (_defaultDrawable == null)
{
_defaultDrawable = _nativeButton.Background;
}
if (Forms.IsLollipopOrNewer)
{
var rippleColor = _backgroundDrawable.PressedBackgroundColor.ToAndroid();
_rippleDrawable = new RippleDrawable(ColorStateList.ValueOf(rippleColor), _backgroundDrawable, null);
_nativeButton.SetBackground(_rippleDrawable);
}
else
{
_nativeButton.SetBackground(_backgroundDrawable);
}
_drawableEnabled = true;
}
_nativeButton.Invalidate();
}
