protected override void OnDraw(Android.Graphics.Canvas canvas) { base.OnDraw(canvas); canvas.Save(); canvas.Translate(_posX, _posY); canvas.Scale(_scaleFactor, _scaleFactor); canvas.Restore(); }
protected override void DispatchDraw(Android.Graphics.Canvas canvas) { canvas.Save(); if (_scaleFactor == 1.0f) { _posX = 0.0f; _posY = 0.0f; } canvas.Translate(_posX, _posY); canvas.Scale(_scaleFactor, _scaleFactor); base.DispatchDraw(canvas); canvas.Restore(); Invalidate(); }
protected override void OnDraw(Android.Graphics.Canvas canvas) { base.OnDraw(canvas); for (int i = 0; i < snow_flake_count; i++) { using (var drawable = drawables[i]) { canvas.Save(); canvas.Translate(coords[i][0], coords [i] [1]); drawable.Draw(canvas); canvas.Restore(); } } Invalidate(); }
protected override bool DrawChild(ACanvas canvas, global::Android.Views.View child, long drawingTime) { if (Element == null) { return(false); } var control = Element as PolygonFrame; SetClipChildren(true); using (var path = PolygonUitls.RegularPolygonPath(Width, Height, control.Sides, control.CornerRadius, 0, control.OffsetAngle)) { canvas.Save(); canvas.ClipPath(path); } var result = base.DrawChild(canvas, child, drawingTime); canvas.Restore(); return(result); }
public override Carto.Graphics.Bitmap OnDrawPopup(PopupDrawInfo popupDrawInfo) { PopupStyle style = popupDrawInfo.Popup.Style; // Calculate scaled dimensions float DPToPX = popupDrawInfo.DPToPX; float PXTODP = 1 / DPToPX; if (style.ScaleWithDPI) { DPToPX = 1; } else { PXTODP = 1; } float screenWidth = popupDrawInfo.ScreenBounds.GetWidth() * PXTODP; float screenHeight = popupDrawInfo.ScreenBounds.GetHeight() * PXTODP; // Update sizes based on scale (uses extension method, cf. Shared/Extensions int fontSize = FontSize.Update(DPToPX); int triangleWidth = TriangleSize.Update(DPToPX); int triangleHeight = TriangleSize.Update(DPToPX); int strokeWidth = StrokeWidth.Update(DPToPX); int screenPadding = ScreenPadding.Update(DPToPX); // Set font var font = Android.Graphics.Typeface.Create("HelveticaNeue-Light", Android.Graphics.TypefaceStyle.Normal); // Calculate the maximum popup size, adjust with dpi int maxPopupWidth = (int)(Math.Min(screenWidth, screenHeight)); float halfStrokeWidth = strokeWidth * 0.5f; int maxTextWidth = maxPopupWidth - (2 * screenPadding + strokeWidth); // Measure text TextPaint textPaint = new TextPaint { Color = TextColor, TextSize = fontSize }; textPaint.SetTypeface(font); var textLayout = new StaticLayout(text, textPaint, maxTextWidth, Layout.Alignment.AlignNormal, 1, 0, false); int textX = (int)Math.Min(textPaint.MeasureText(text), textLayout.Width); int textY = textLayout.Height; int popupWidth = textX + (2 * PopupPadding + strokeWidth + triangleWidth); int popupHeight = textY + (2 * PopupPadding + strokeWidth); var bitmap = Android.Graphics.Bitmap.CreateBitmap(popupWidth, popupHeight, Android.Graphics.Bitmap.Config.Argb8888); var canvas = new Android.Graphics.Canvas(bitmap); var trianglePath = new Android.Graphics.Path(); trianglePath.MoveTo(triangleWidth, 0); trianglePath.LineTo(halfStrokeWidth, triangleHeight * 0.5f); trianglePath.LineTo(triangleWidth, triangleHeight); trianglePath.Close(); int triangleOffsetX = 0; int triangleOffsetY = (popupHeight - triangleHeight) / 2; // Create paint object var paint = new Android.Graphics.Paint(); paint.AntiAlias = true; paint.SetStyle(Android.Graphics.Paint.Style.Stroke); paint.StrokeWidth = strokeWidth; paint.Color = StrokeColor; // Stroke background var background = new Android.Graphics.RectF(); background.Left = triangleWidth; background.Top = halfStrokeWidth; background.Right = popupWidth - strokeWidth; background.Bottom = popupHeight - strokeWidth; canvas.DrawRect(background, paint); // Stroke triangle canvas.Save(); canvas.Translate(triangleOffsetX, triangleOffsetY); canvas.DrawPath(trianglePath, paint); canvas.Restore(); // Fill background paint.SetStyle(Android.Graphics.Paint.Style.Fill); paint.Color = BackgroundColor; canvas.DrawRect(background, paint); // Fill triangle canvas.Save(); canvas.Translate(triangleOffsetX, triangleOffsetY); canvas.DrawPath(trianglePath, paint); canvas.Restore(); if (textLayout != null) { // Draw text canvas.Save(); canvas.Translate(halfStrokeWidth + triangleWidth + PopupPadding, halfStrokeWidth + PopupPadding); textLayout.Draw(canvas); canvas.Restore(); } return(BitmapUtils.CreateBitmapFromAndroidBitmap(bitmap)); }
public override Carto.Graphics.Bitmap OnDrawPopup(PopupDrawInfo popupDrawInfo) { PopupStyle style = popupDrawInfo.Popup.Style; // Calculate scaled dimensions float DPToPX = popupDrawInfo.DPToPX; float PXTODP = 1 / DPToPX; if (style.ScaleWithDPI) { DPToPX = 1; } else { PXTODP = 1; } float screenWidth = popupDrawInfo.ScreenBounds.GetWidth() * PXTODP; float screenHeight = popupDrawInfo.ScreenBounds.GetHeight() * PXTODP; // Update sizes based on scale (uses extension method, cf. Shared/Extensions int fontSize = FontSize.Update(DPToPX); int triangleWidth = TriangleSize.Update(DPToPX); int triangleHeight = TriangleSize.Update(DPToPX); int strokeWidth = StrokeWidth.Update(DPToPX); int screenPadding = ScreenPadding.Update(DPToPX); // Set font var font = Android.Graphics.Typeface.Create("HelveticaNeue-Light", Android.Graphics.TypefaceStyle.Normal); // Calculate the maximum popup size, adjust with dpi int maxPopupWidth = (int)(Math.Min(screenWidth, screenHeight)); float halfStrokeWidth = strokeWidth * 0.5f; int maxTextWidth = maxPopupWidth - (2 * screenPadding + strokeWidth); // Measure text TextPaint textPaint = new TextPaint { Color = TextColor, TextSize = fontSize }; textPaint.SetTypeface(font); var textLayout = new StaticLayout(text, textPaint, maxTextWidth, Layout.Alignment.AlignNormal, 1, 0, false); int textX = (int)Math.Min(textPaint.MeasureText(text), textLayout.Width); int textY = textLayout.Height; int popupWidth = textX + (2 * PopupPadding + strokeWidth + triangleWidth); int popupHeight = textY + (2 * PopupPadding + strokeWidth); var bitmap = Android.Graphics.Bitmap.CreateBitmap(popupWidth, popupHeight, Android.Graphics.Bitmap.Config.Argb8888); var canvas = new Android.Graphics.Canvas(bitmap); var trianglePath = new Android.Graphics.Path(); trianglePath.MoveTo(triangleWidth, 0); trianglePath.LineTo(halfStrokeWidth, triangleHeight * 0.5f); trianglePath.LineTo(triangleWidth, triangleHeight); trianglePath.Close(); int triangleOffsetX = 0; int triangleOffsetY = (popupHeight - triangleHeight) / 2; // Create paint object var paint = new Android.Graphics.Paint(); paint.AntiAlias = true; paint.SetStyle(Android.Graphics.Paint.Style.Stroke); paint.StrokeWidth = strokeWidth; paint.Color = StrokeColor; // Stroke background var background = new Android.Graphics.RectF(); background.Left = triangleWidth; background.Top = halfStrokeWidth; background.Right = popupWidth - strokeWidth; background.Bottom = popupHeight - strokeWidth; canvas.DrawRect(background, paint); // Stroke triangle canvas.Save(); canvas.Translate(triangleOffsetX, triangleOffsetY); canvas.DrawPath(trianglePath, paint); canvas.Restore(); // Fill background paint.SetStyle(Android.Graphics.Paint.Style.Fill); paint.Color = BackgroundColor; canvas.DrawRect(background, paint); // Fill triangle canvas.Save(); canvas.Translate(triangleOffsetX, triangleOffsetY); canvas.DrawPath(trianglePath, paint); canvas.Restore(); if (textLayout != null) { // Draw text canvas.Save(); canvas.Translate(halfStrokeWidth + triangleWidth + PopupPadding, halfStrokeWidth + PopupPadding); textLayout.Draw(canvas); canvas.Restore(); } return BitmapUtils.CreateBitmapFromAndroidBitmap(bitmap); }