public static void UpdateBackground(this GradientDrawable gradientDrawable, Brush brush, int height, int width)
{
if (gradientDrawable == null || brush == null || brush.IsEmpty)
{
return;
}
if (brush is SolidColorBrush solidColorBrush)
{
Color bgColor = solidColorBrush.Color;
gradientDrawable.SetColor(bgColor.IsDefault ? Color.Default.ToAndroid() : bgColor.ToAndroid());
}
if (brush is LinearGradientBrush linearGradientBrush)
{
var p1 = linearGradientBrush.StartPoint;
var x1 = (float)p1.X;
var y1 = (float)p1.Y;
var p2 = linearGradientBrush.EndPoint;
var x2 = (float)p2.X;
var y2 = (float)p2.Y;
const double Rad2Deg = 180.0 / Math.PI;
var angle = Math.Atan2(y2 - y1, x2 - x1) * Rad2Deg;
var gradientBrushData = linearGradientBrush.GetGradientBrushData();
var colors = gradientBrushData.Item1;
if (colors.Length < 2)
{
return;
}
gradientDrawable.SetGradientType(GradientType.LinearGradient);
gradientDrawable.SetColors(colors);
gradientDrawable.SetGradientOrientation(angle);
}
if (brush is RadialGradientBrush radialGradientBrush)
{
var center = radialGradientBrush.Center;
float centerX = (float)center.X;
float centerY = (float)center.Y;
float radius = (float)radialGradientBrush.Radius;
var gradientBrushData = radialGradientBrush.GetGradientBrushData();
var colors = gradientBrushData.Item1;
if (colors.Length < 2)
{
return;
}
gradientDrawable.SetGradientType(GradientType.RadialGradient);
gradientDrawable.SetGradientCenter(centerX, centerY);
gradientDrawable.SetGradientRadius(Math.Max(height, width) * radius);
gradientDrawable.SetColors(colors);
}
}
/**
* 创建阴影的GradientDrawable
*/
private void createDrawable()
{
var uintValue = 0xb0333333;
int[] color = { 0x333333, (int)uintValue };
mFolderShadowDrawableRL = new GradientDrawable(GradientDrawable.Orientation.RightLeft, color);
mFolderShadowDrawableRL.SetGradientType(GradientType.LinearGradient);
mFolderShadowDrawableLR = new GradientDrawable(GradientDrawable.Orientation.LeftRight, color);
mFolderShadowDrawableLR.SetGradientType(GradientType.LinearGradient);
var uintValue2 = 0xff111111;
mBackShadowColors = new int[] { (int)uintValue2, 0x111111 };
mBackShadowDrawableRL = new GradientDrawable(GradientDrawable.Orientation.RightLeft, mBackShadowColors);
mBackShadowDrawableRL.SetGradientType(GradientType.LinearGradient);
mBackShadowDrawableLR = new GradientDrawable(GradientDrawable.Orientation.LeftRight, mBackShadowColors);
mBackShadowDrawableLR.SetGradientType(GradientType.LinearGradient);
var uintValue3 = 0x80111111;
mFrontShadowColors = new int[] { (int)uintValue3, 0x111111 };
mFrontShadowDrawableVLR = new GradientDrawable(GradientDrawable.Orientation.LeftRight, mFrontShadowColors);
mFrontShadowDrawableVLR.SetGradientType(GradientType.LinearGradient);
mFrontShadowDrawableVRL = new GradientDrawable(GradientDrawable.Orientation.RightLeft, mFrontShadowColors);
mFrontShadowDrawableVRL.SetGradientType(GradientType.LinearGradient);
mFrontShadowDrawableHTB = new GradientDrawable(GradientDrawable.Orientation.TopBottom, mFrontShadowColors);
mFrontShadowDrawableHTB.SetGradientType(GradientType.LinearGradient);
mFrontShadowDrawableHBT = new GradientDrawable(GradientDrawable.Orientation.BottomTop, mFrontShadowColors);
mFrontShadowDrawableHBT.SetGradientType(GradientType.LinearGradient);
}
protected override void OnElementChanged(ElementChangedEventArgs <Xamarin.Forms.Button> e)
{
base.OnElementChanged(e);
if (Control != null)
{
try
{
almeButton = e.NewElement as AlmeButton;
GradientDrawable gradientDrawable = new GradientDrawable();
gradientDrawable.SetShape(ShapeType.Rectangle);
gradientDrawable.SetCornerRadius(almeButton.BorderRadius * 2);
if (almeButton.CenterColor != Xamarin.Forms.Color.Transparent)
{
gradientDrawable.SetColors(new int[] { almeButton.EndColor.ToAndroid(),
almeButton.CenterColor.ToAndroid(), almeButton.StartColor.ToAndroid() });
}
else
{
gradientDrawable.SetColors(new int[] { almeButton.EndColor.ToAndroid(),
almeButton.StartColor.ToAndroid() });
}
gradientDrawable.SetGradientType(GradientType.LinearGradient);
gradientDrawable.SetOrientation(GradientDrawable.Orientation.RightLeft);
#pragma warning disable CS0618 // Type or member is obsolete
Control.SetBackgroundDrawable(gradientDrawable);
#pragma warning restore CS0618 // Type or member is obsolete
Control.SetTextColor(almeButton.TextColor.ToAndroid());
if (almeButton.FontFamily != null)
{
Control.Typeface = Typeface.CreateFromAsset(Forms.Context.ApplicationContext.Assets, almeButton.FontFamily.Split('#')[0]);
}
}
catch { }
}
}
protected override void OnElementChanged(ElementChangedEventArgs <Button> e)
{
base.OnElementChanged(e);
if (e.OldElement == null)
{
var button = Control;
// See ButtonRendererWithNavFix.cs
CustomClickHandler(button);
// Applies a "blue" gradient to our Android navigation buttons
var gradientDrawable = new GradientDrawable();
gradientDrawable.SetOrientation(GradientDrawable.Orientation.TlBr);
gradientDrawable.SetColors(new int[] { Color.Argb(255, 20, 143, 194), Color.Argb(255, 0, 44, 119) });
gradientDrawable.SetGradientType(GradientType.RadialGradient);
gradientDrawable.SetGradientRadius(300);
gradientDrawable.SetGradientCenter(0.5f, 0);
button.SetBackgroundDrawable(gradientDrawable);
// Sets a small drop shadow to the buttons' text
button.SetShadowLayer(1, 1, 1, Color.Black);
}
}
protected override void OnElementChanged(ElementChangedEventArgs <Label> e)
{
base.OnElementChanged(e);
LabelWithBorder model = (LabelWithBorder)Element;
if (e.OldElement != null)
{
// Unsubscribe from event handlers and cleanup any resources
}
if (e.NewElement != null)
{
if (Control != null)
{
GradientDrawable gd = new GradientDrawable();
if (!string.IsNullOrEmpty(model.Text))
{
gd.SetShape(ShapeType.Rectangle);
gd.SetGradientType(GradientType.LinearGradient);
gd.SetCornerRadius(model.CornerRadius * 4);
gd.SetStroke(model.BorderThickness, model.BorderColor.ToAndroid());
gd.SetColor(model.DrawableColor.ToAndroid());
Control.SetPadding(2, 2, 2, 2);
Control.SetBackground(gd);
}
}
}
}
private void UpdateGradientBackground()
{
var button = this.Element as AppButton;
if (button != null && button.GradientEnabled)
{
int[] colors;
if (button.MiddleColorEnabled)
{
colors = new int[] { button.StartColor.ToAndroid(), button.MiddleColor.ToAndroid(), button.EndColor.ToAndroid() };
}
else
{
colors = new int[] { button.StartColor.ToAndroid(), button.EndColor.ToAndroid() };
}
var gradientDrawable = new GradientDrawable(GradientDrawable.Orientation.TopBottom, colors);
switch (button.Orientation)
{
case "TopBottom":
{
gradientDrawable = new GradientDrawable(GradientDrawable.Orientation.TopBottom, colors);
break;
}
case "BottomTop":
{
gradientDrawable = new GradientDrawable(GradientDrawable.Orientation.BottomTop, colors);
break;
}
case "RightLeft":
{
gradientDrawable = new GradientDrawable(GradientDrawable.Orientation.RightLeft, colors);
break;
}
case "LeftRight":
{
gradientDrawable = new GradientDrawable(GradientDrawable.Orientation.LeftRight, colors);
break;
}
}
gradientDrawable.SetGradientType(GradientType.LinearGradient);
gradientDrawable.SetShape(ShapeType.Rectangle);
gradientDrawable.SetCornerRadius(DpToPixels(this.Context, Convert.ToSingle(button.FixedBorderRadius)));
gradientDrawable.SetStroke((int)button.BorderWidth, button.BorderColor.ToAndroid());
this.Control.Background = gradientDrawable;
}
}
void UpdateEntry()
{
var element = Element as AppEntry;
int[] colors = new int[] { element.StartColor.ToAndroid(), element.EndColor.ToAndroid() };
var gradientDrawable = new GradientDrawable(GradientDrawable.Orientation.TopBottom, colors);
gradientDrawable.SetGradientType(GradientType.LinearGradient);
gradientDrawable.SetShape(ShapeType.Rectangle);
gradientDrawable.SetCornerRadius(DpToPixels(this.Context, Convert.ToSingle(element.BorderRadius)));
gradientDrawable.SetStroke((int)element.BorderWidth, element.BorderColor.ToAndroid());
this.Control.Background = gradientDrawable;
}
protected override void OnAttached()
{
if (gradientDrawable == null)
{
gradientDrawable = new GradientDrawable();
Control.Background = gradientDrawable;
var effect = (PQGradiantEffect)Element.Effects.FirstOrDefault(e => e is PQGradiantEffect);
if (effect == null)
{
return;
}
SetColors();
if (!effect.IsRadial)
{
switch (effect.Oriantaion)
{
case Helpers.Shared.GradiantOriantaion.LeftToRight:
gradientDrawable.SetOrientation(GradientDrawable.Orientation.LeftRight);
break;
case Helpers.Shared.GradiantOriantaion.RightToLeft:
gradientDrawable.SetOrientation(GradientDrawable.Orientation.RightLeft);
break;
case Helpers.Shared.GradiantOriantaion.TopToBottom:
gradientDrawable.SetOrientation(GradientDrawable.Orientation.TopBottom);
break;
case Helpers.Shared.GradiantOriantaion.BottomToTop:
gradientDrawable.SetOrientation(GradientDrawable.Orientation.BottomTop);
break;
default:
gradientDrawable.SetOrientation(GradientDrawable.Orientation.LeftRight);
break;
}
}
gradientDrawable.SetGradientRadius(150);
gradientDrawable.SetShape(ShapeType.Rectangle);
gradientDrawable.SetCornerRadius(effect.Radius);
gradientDrawable.SetGradientType(effect.IsRadial ? GradientType.RadialGradient : GradientType.LinearGradient);
}
}
// Properties
public override void AddUnderline( )
{
if (UnderlineView == null)
{
// Define a gradiant underline that will be shown underneath the text
int[] colors = new int[] { int.MaxValue, int.MaxValue };
GradientDrawable border = new GradientDrawable(GradientDrawable.Orientation.LeftRight, colors);
border.SetGradientType(GradientType.LinearGradient);
UnderlineView = new View(Rock.Mobile.PlatformSpecific.Android.Core.Context);
UnderlineView.LayoutParameters = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WrapContent, ViewGroup.LayoutParams.WrapContent);
UnderlineView.Background = border;
UnderlineView.LayoutParameters.Height = 2;
}
}
private void UpdateGradientBackground()
{
var button = Element as AppButton;
if (button != null && button.GradientEnabled)
{
int[] colors = new int[] { button.StartColor.ToAndroid(), button.EndColor.ToAndroid() };
var gradientDrawable = new GradientDrawable(GradientDrawable.Orientation.TopBottom, colors);
gradientDrawable.SetGradientType(GradientType.LinearGradient);
gradientDrawable.SetShape(ShapeType.Rectangle);
gradientDrawable.SetCornerRadius(DpToPixels(this.Context, Convert.ToSingle(button.FixedBorderRadius)));
gradientDrawable.SetStroke((int)button.BorderWidth, button.BorderColor.ToAndroid());
this.Control.Background = gradientDrawable;
}
}
public OverlappedWidget(Context context, string bookId,
List <BookMixAToc.MixToc.Chapters> chaptersList,
IOnReadStateChangeListener listener) : base(context, bookId, chaptersList, listener)
{
mTouch.X = 0.01f;
mTouch.Y = 0.01f;
mPath0 = new Path();
var uintValue = 0xaa666666;
int[] mBackShadowColors = new int[] { (int)uintValue, 0x666666 };
mBackShadowDrawableRL = new GradientDrawable(GradientDrawable.Orientation.RightLeft, mBackShadowColors);
mBackShadowDrawableRL.SetGradientType(GradientType.LinearGradient);
mBackShadowDrawableLR = new GradientDrawable(GradientDrawable.Orientation.LeftRight, mBackShadowColors);
mBackShadowDrawableLR.SetGradientType(GradientType.LinearGradient);
}
protected override void OnElementChanged(ElementChangedEventArgs <Xamarin.Forms.Image> e)
{
base.OnElementChanged(e);
int startColor = BaseControl.StartColor.ToAndroid().ToArgb();
int endColor = BaseControl.EndColor.ToAndroid().ToArgb();
int[] colors = { startColor, endColor };
//float[] radii = { 5, 5, 5, 5, 5, 5, 5, 5 };
GradientDrawable.Orientation orientation = null;
Android.Graphics.Drawables.GradientType gradientType;
switch (BaseControl.Orientation)
{
case GradientOrientation.BottomTop: orientation = GradientDrawable.Orientation.BottomTop; break;
case GradientOrientation.LeftRight: orientation = GradientDrawable.Orientation.LeftRight; break;
case GradientOrientation.RightLeft: orientation = GradientDrawable.Orientation.RightLeft; break;
case GradientOrientation.TopBottom: orientation = GradientDrawable.Orientation.TopBottom; break;
default: orientation = GradientDrawable.Orientation.TopBottom; break;
}
switch (BaseControl.GradientStyle)
{
case GradientType.Linear: gradientType = Android.Graphics.Drawables.GradientType.LinearGradient; break;
case GradientType.Sweep: gradientType = Android.Graphics.Drawables.GradientType.SweepGradient; break;
case GradientType.Radial: gradientType = Android.Graphics.Drawables.GradientType.RadialGradient; break;
default: gradientType = gradientType = Android.Graphics.Drawables.GradientType.LinearGradient; break;
}
GradientDrawable drawable = new GradientDrawable(orientation, colors);
drawable.SetGradientType(gradientType);
//drawable.SetCornerRadii(radii);
//drawable.SetStroke(1, Android.Graphics.Color.ParseColor("#FF000000"));
drawable.SetCornerRadius(0f);
this.Control.SetBackgroundDrawable(drawable);
}
/// <summary>
///
/// </summary>
/// <param name="context"></param>
/// <param name="colors">new int[]{Color.LightGreen,Color.DarkGreen,}</param>
/// <param name="width"></param>
/// <param name="height"></param>
/// <param name="showBorderWhite">Set 3 pixels width solid color border</param>
/// <param name="showCornerRadius">Set CornerRadius 10</param>
/// <returns></returns>
public static (GradientDrawable, Bitmap) GetGradientDrawable(Activity context, int[] colors, int width,
int height, bool showBorderWhite = false, bool showCornerRadius = false)
{
try
{
// Initialize a new GradientDrawable
var gd = new GradientDrawable();
// Set the color array to draw gradient
gd.SetColors(colors);
// Set the GradientDrawable gradient type linear gradient
gd.SetGradientType(GradientType.LinearGradient);
// Set GradientDrawable shape is a rectangle
gd.SetShape(ShapeType.Rectangle);
// Set 3 pixels width solid color border
if (showBorderWhite)
{
gd.SetStroke(3, Color.White);
}
// Set GradientDrawable width and in pixels
gd.SetSize(width, height); // Width 450 pixels and height 150 pixels
// Set CornerRadius
if (showCornerRadius)
{
gd.SetCornerRadius(10);
}
var bitmap = BitmapUtil.ConvertToBitmap(gd, width, height);
return(gd, bitmap);
}
catch (Exception e)
{
Methods.DisplayReportResultTrack(e);
return(null, null);
}
}
public static Drawable CreateBackgroundGradient(Color startColor, Color endColor, Color centerColor,
float cornerRadius, GradientDrawable.Orientation orientation)
{
GradientDrawable gradientDrawable = new GradientDrawable();
gradientDrawable.SetShape(ShapeType.Rectangle);
gradientDrawable.SetCornerRadius(cornerRadius);
if (centerColor != Xamarin.Forms.Color.Transparent.ToAndroid())
{
gradientDrawable.SetColors(new int[] { startColor,
centerColor, endColor });
}
else
{
gradientDrawable.SetColors(new int[] { startColor, endColor });
}
gradientDrawable.SetGradientType(GradientType.LinearGradient);
gradientDrawable.SetOrientation(orientation);
return(gradientDrawable);
}
protected override void OnElementChanged(ElementChangedEventArgs <Button> e)
{
base.OnElementChanged(e);
if (e.OldElement == null)
{
var button = Control;
// Applies a "gray" gradient to our Android popup buttons
var gradientDrawable = new GradientDrawable();
gradientDrawable.SetOrientation(GradientDrawable.Orientation.TlBr);
gradientDrawable.SetColors(new int[] { Color.Argb(255, 167, 169, 172), Color.Argb(255, 76, 76, 76) });
gradientDrawable.SetGradientType(GradientType.RadialGradient);
gradientDrawable.SetGradientRadius(300);
gradientDrawable.SetGradientCenter(0.5f, 0);
button.SetBackgroundDrawable(gradientDrawable);
// Sets a small drop shadow to the buttons' text
button.SetShadowLayer(1, 1, 1, Color.Black);
}
}
void SetGradientOrientation()
{
var control = (GradientTabbedPage)this.Element;
gradient.SetGradientType(GradientType.LinearGradient);
if (control.Orientation == GradientOrientation.Horizontal)
{
gradient.SetOrientation(GradientDrawable.Orientation.LeftRight);
gradient.SetColors(new int[] { control.StartColor.ToAndroid(), control.EndColor.ToAndroid() });
}
else if (control.Orientation == GradientOrientation.Vertical)
{
gradient.SetOrientation(GradientDrawable.Orientation.TopBottom);
gradient.SetColors(new int[] { control.StartColor.ToAndroid(), control.EndColor.ToAndroid() });
}
else if (control.Orientation == GradientOrientation.BlTr)
{
gradient.SetOrientation(GradientDrawable.Orientation.BlTr);
gradient.SetColors(new int[] { control.StartColor.ToAndroid(), control.EndColor.ToAndroid() });
}
else if (control.Orientation == GradientOrientation.BrTl)
{
gradient.SetOrientation(GradientDrawable.Orientation.BlTr);
gradient.SetColors(new int[] { control.StartColor.ToAndroid(), control.EndColor.ToAndroid() });
}
else if (control.Orientation == GradientOrientation.TlBr)
{
gradient.SetOrientation(GradientDrawable.Orientation.TlBr);
gradient.SetColors(new int[] { control.StartColor.ToAndroid(), control.EndColor.ToAndroid() });
}
else if (control.Orientation == GradientOrientation.TrBl)
{
gradient.SetOrientation(GradientDrawable.Orientation.TrBl);
gradient.SetColors(new int[] { control.StartColor.ToAndroid(), control.EndColor.ToAndroid() });
}
}