public CameraPreview(Context context)
: base(context)
{
_surfaceView = new SurfaceView(context);
_surfaceView.Touch += (sender, args) =>
{
var x = args.Event.GetX();
var y = args.Event.GetY();
var touchRect = new Android.Graphics.Rect(
(int)(x - 100),
(int)(y - 100),
(int)(x + 100),
(int)(y + 100));
var targetFocusRect = new Android.Graphics.Rect(
touchRect.Left * 2000 / this.Width - 1000,
touchRect.Top * 2000 / this.Height - 1000,
touchRect.Right * 2000 / this.Width - 1000,
touchRect.Bottom * 2000 / this.Height - 1000);
this.DoTouchFocus(targetFocusRect);
};
AddView(_surfaceView);
_windowManager = Context.GetSystemService(Context.WindowService).JavaCast <IWindowManager>();
IsPreviewing = false;
_holder = _surfaceView.Holder;
_holder.AddCallback(this);
}
private Android.Graphics.Rect GetWindowRect()
{
var windowRect = new Android.Graphics.Rect();
_activity.WindowManager.DefaultDisplay.GetRectSize(windowRect);
return(windowRect);
}
void AdjustHorizontalScroll(int index, ScrollToPosition scrollToPosition)
{
_pendingScrollAdjustment = null;
var viewRect = GetViewRect(index);
if (viewRect == null)
{
return;
}
var offset = 0;
var rvRect = new ARect();
_recyclerView.GetGlobalVisibleRect(rvRect);
if (scrollToPosition == ScrollToPosition.Center)
{
offset = viewRect.CenterX() - rvRect.CenterX();
}
else if (scrollToPosition == ScrollToPosition.End)
{
offset = viewRect.Right - rvRect.Right;
}
_recyclerView.ScrollBy(offset, 0);
}
public override void GetItemOffsets(Android.Graphics.Rect outRect, int itemPosition, RecyclerView parent)
{
//TODO - work out if the rectangle is the last/first row/column
if (itemPosition % _numberOfItemsPerRow == 0)
{
//first col
outRect.Left = _columnSpacing;
}
else
{
outRect.Left = _columnSpacing / 2;
}
if (itemPosition % _numberOfItemsPerRow == (_numberOfItemsPerRow - 1))
{
//last col
outRect.Right = _columnSpacing;
}
else
{
outRect.Right = _columnSpacing / 2;
}
//TODO write a custom layout for android
// if (itemPosition < _numberOfItemsPerRow) {
// outRect.Top = _topSpacing;
// }
// if (itemPosition > (_numberOfItems - _numberOfItemsPerRow)) {
// outRect.Bottom = _bottomSpacing;
// } else {
outRect.Bottom = _rowSpacing;
// }
}
public void DrawImage(Image image, Rectangle to, int fromx, int fromy, int fromw, int fromh, GraphicsUnit gu, ImageAttributes ia)
{
APaint.Flags = (Android.Graphics.PaintFlags) 0;
var sa = new Android.Graphics.Rect(fromx, fromy, fromx + fromw, fromy + fromh);
var da = to.ToA();
Android.Graphics.Paint p = null;
Android.Graphics.ColorMatrixColorFilter cmf = null;
if (ia != null && ia.GetColorMatrix() != null)
{
p = new Android.Graphics.Paint(APaint);
var values = ia.GetColorMatrix().Matrix;
float[] v2 = values[0].Concat(values[1]).Concat(values[2]).Concat(values[3]).ToArray();
cmf = new Android.Graphics.ColorMatrixColorFilter(v2);
p.SetColorFilter(cmf);
}
ACanvas.DrawBitmap((image as Bitmap).ABitmap, sa, da, p == null ? APaint : p);
if (p != null)
{
p.Dispose();
}
if (cmf != null)
{
cmf.Dispose();
}
da.Dispose();
sa.Dispose();
}
void AdjustVerticalScroll(int index, ScrollToPosition scrollToPosition)
{
_pendingScrollAdjustment = null;
var viewRect = GetViewRect(index);
if (viewRect == null)
{
return;
}
var offset = 0;
var rvRect = new ARect();
_recyclerView.GetGlobalVisibleRect(rvRect);
if (scrollToPosition == ScrollToPosition.Center)
{
offset = viewRect.CenterY() - rvRect.CenterY();
}
else if (scrollToPosition == ScrollToPosition.End)
{
offset = viewRect.Bottom - rvRect.Bottom;
}
_recyclerView.ScrollBy(0, offset);
}
protected override void Draw(Canvas canvas, Rect bounds)
{
int saveCount = canvas.Save();
RectF arcBounds = mCurrentBounds;
arcBounds.Set(bounds);
//draw bottle
mPaint.SetStyle(Paint.Style.Stroke);
mPaint.Color = new Color(mBottleColor);
canvas.DrawPath(CreateBottlePath(mBottleBounds), mPaint);
//draw water
mPaint.SetStyle(Paint.Style.FillAndStroke);
mPaint.Color = new Color(mWaterColor);
canvas.DrawPath(CreateWaterPath(mWaterBounds, mProgress), mPaint);
//draw water drop
mPaint.SetStyle(Paint.Style.Fill);
mPaint.Color = new Color(mWaterColor);
foreach (WaterDropHolder waterDropHolder in mWaterDropHolders)
{
if (waterDropHolder.mNeedDraw)
{
canvas.DrawCircle(waterDropHolder.mInitX, waterDropHolder.mCurrentY, waterDropHolder.mRadius, mPaint);
}
}
//draw loading text
mPaint.Color = new Color(mBottleColor);
canvas.DrawText(LOADING_TEXT, mBottleBounds.CenterX() - mLoadingBounds.Width() / 2.0f, mBottleBounds.Bottom + mBottleBounds.Height() * 0.2f, mPaint);
canvas.RestoreToCount(saveCount);
}
protected virtual Thickness GetNativePadding()
{
if (this.NativeUIElement.Background == null)
{
return(new Thickness(0));
}
Android.Graphics.Rect rect = new Android.Graphics.Rect();
this.NativeUIElement.Background.GetPadding(rect);
Thickness absoluteNativePadding = new Thickness();
absoluteNativePadding.Left = rect.Left + (this.NativeUIElement.Background.MinimumWidth - rect.Left - rect.Right) / 2.0;
absoluteNativePadding.Top = rect.Top + (this.NativeUIElement.Background.MinimumHeight - rect.Top - rect.Bottom) / 2.0;
absoluteNativePadding.Right = rect.Right + (this.NativeUIElement.Background.MinimumWidth - rect.Left - rect.Right) / 2.0;
absoluteNativePadding.Bottom = rect.Bottom + (this.NativeUIElement.Background.MinimumHeight - rect.Top - rect.Bottom) / 2.0;
Thickness dpiNativePadding = new Thickness();
dpiNativePadding.Left = ScreenProperties.ConvertPixelsToDPI((float)absoluteNativePadding.Left);
dpiNativePadding.Top = ScreenProperties.ConvertPixelsToDPI((float)absoluteNativePadding.Top);
dpiNativePadding.Right = ScreenProperties.ConvertPixelsToDPI((float)absoluteNativePadding.Right);
dpiNativePadding.Bottom = ScreenProperties.ConvertPixelsToDPI((float)absoluteNativePadding.Bottom);
return(dpiNativePadding);
}
public void DoTouchFocus(Android.Graphics.Rect focusRect)
{
try
{
var list = new List <Camera.Area>();
Camera.Area focusArea = new Camera.Area(focusRect, 1000);
list.Add(focusArea);
var parameters = _camera.GetParameters();
parameters.FocusAreas = list;
parameters.MeteringAreas = list;
_camera.SetParameters(parameters);
_camera.AutoFocus(this);
}
catch (Exception exception)
{
// e.printStackTrace();
}
//if (isNeedToTakePic())
//{
// onFocusListener.onFocused();
//}
}
public override void GetItemOffsets(Android.Graphics.Rect outRect, Android.Views.View view, RecyclerView parent, RecyclerView.State state)
{
var index = ((RecyclerView.LayoutParams)view.LayoutParameters).ViewAdapterPosition;
if (_skipFirst)
{
if (index == 0)
{
base.GetItemOffsets(outRect, view, parent, state);
return;
}
index--;
}
switch (index % 3)
{
case 0:
{
outRect.Set(0, 0, 2, 3);
break;
}
case 1:
{
outRect.Set(1, 0, 1, 3);
break;
}
case 2:
{
outRect.Set(2, 0, 0, 3);
break;
}
}
}
public override Rectangle GetScreenBounds(object backend)
{
var d = (Android.Views.Display)backend;
var r = new Android.Graphics.Rect();
d.GetRectSize(r);
return(Xwt.Rectangle.FromLTRB(r.Left, r.Top, r.Right, r.Bottom));
}
bool IsViewInBounds(AView view, int x, int y)
{
ARect outRect = new ARect();
view.GetHitRect(outRect);
return(x > outRect.Left && x < outRect.Right && y > outRect.Top && y < outRect.Bottom);
}
public override void GetItemOffsets(ARect outRect, AView view, RecyclerView parent, RecyclerView.State state)
{
base.GetItemOffsets(outRect, view, parent, state);
outRect.Left = HorizontalOffset;
outRect.Right = HorizontalOffset;
outRect.Bottom = VerticalOffset;
outRect.Top = VerticalOffset;
}
public override void GetItemOffsets(ARect outRect, AView view, RecyclerView parent, RecyclerView.State state)
{
base.GetItemOffsets(outRect, view, parent, state);
if (_adjustedVerticalSpacing == -1)
{
_adjustedVerticalSpacing = (int)parent.Context.ToPixels(_verticalSpacing);
}
if (_adjustedHorizontalSpacing == -1)
{
_adjustedHorizontalSpacing = (int)parent.Context.ToPixels(_horizontalSpacing);
}
var itemViewType = parent.GetChildViewHolder(view).ItemViewType;
if (itemViewType == ItemViewType.Header)
{
if (_orientation == ItemsLayoutOrientation.Vertical)
{
outRect.Bottom = _adjustedVerticalSpacing;
}
else
{
outRect.Right = _adjustedHorizontalSpacing;
}
return;
}
if (itemViewType == ItemViewType.Footer)
{
return;
}
var spanIndex = 0;
if (view.LayoutParameters is GridLayoutManager.LayoutParams gridLayoutParameters)
{
spanIndex = gridLayoutParameters.SpanIndex;
}
var spanGroupIndex = GetSpanGroupIndex(view, parent);
if (_orientation == ItemsLayoutOrientation.Vertical)
{
outRect.Left = spanIndex == 0 ? 0 : _adjustedHorizontalSpacing;
outRect.Top = spanGroupIndex == 0 ? 0 : _adjustedVerticalSpacing;
}
if (_orientation == ItemsLayoutOrientation.Horizontal)
{
outRect.Top = spanIndex == 0 ? 0 : _adjustedVerticalSpacing;
outRect.Left = spanGroupIndex == 0 ? 0 : _adjustedHorizontalSpacing;
}
}
public void DrawImage(Image image, int x, int y, Rectangle source, GraphicsUnit gu)
{
APaint.Flags = (Android.Graphics.PaintFlags) 0;
var sa = source.ToA();
var da = new Android.Graphics.Rect(x, y, x + source.Width, y + source.Height);
ACanvas.DrawBitmap((image as Bitmap).ABitmap, sa, da, APaint);
da.Dispose();
sa.Dispose();
}
private static int ComputeWidth(TextView tv, bool isOrdered)
{
Android.Graphics.Paint paint = tv.Paint;
using var bounds = new Android.Graphics.Rect();
var startString = isOrdered ? "99. " : "• ";
paint.GetTextBounds(startString, 0, startString.Length, bounds);
var width = bounds.Width();
var pt = Android.Util.TypedValue.ApplyDimension(Android.Util.ComplexUnitType.Pt, width, tv.Context.Resources.DisplayMetrics);
return (int)pt;
}
public double StringSize(string text)
{
var bounds = new Android.Graphics.Rect();
TextView view = new TextView(Forms.Context);
view.Paint.GetTextBounds(text, 0, text.Length, bounds);
var length = bounds.Width();
return(length / Resources.System.DisplayMetrics.ScaledDensity);
}
private int computeUsableHeight()
{
Android.Graphics.Rect r = new Android.Graphics.Rect();
mChildOfContent.GetWindowVisibleDisplayFrame(r);
if (Build.VERSION.SdkInt < BuildVersionCodes.Lollipop)
{
return(r.Bottom - r.Top);
}
return(r.Bottom);
}
void ViewTreeObserver.IOnGlobalLayoutListener.OnGlobalLayout()
{
Android.Graphics.Rect rect = new Android.Graphics.Rect();
Window.DecorView.GetWindowVisibleDisplayFrame(rect);
Single size = _view.Height - rect.Height();
if (_onLayoutChanged != null)
{
_onLayoutChanged.Invoke(size);
}
}
protected override void Draw(Canvas canvas, Rect bounds)
{
int saveCount = canvas.Save();
RectF arcBounds = mTempBounds;
arcBounds.Set(bounds);
mPaint.Alpha = MAX_ALPHA;
mPaint.SetStyle(Paint.Style.Stroke);
mPaint.Color = new Color(mCurrentColor);
if (mSunCoordinateY < mInitSun_MoonCoordinateY)
{
canvas.DrawCircle(arcBounds.CenterX(), mSunCoordinateY, mSun_MoonRadius, mPaint);
}
if (mMoonCoordinateY < mInitSun_MoonCoordinateY)
{
int moonSaveCount = canvas.Save();
canvas.Rotate(mMoonRotation, arcBounds.CenterX(), mMoonCoordinateY);
canvas.DrawPath(CreateMoonPath(arcBounds.CenterX(), mMoonCoordinateY), mPaint);
canvas.RestoreToCount(moonSaveCount);
}
for (int i = 0; i < mSunRayCount; i++)
{
int sunRaySaveCount = canvas.Save();
//rotate 45 degrees can change the direction of 0 degrees to 1:30 clock
//-mSunRayRotation means reverse rotation
canvas.Rotate(45 - mSunRayRotation + (mIsExpandSunRay ? i : MAX_SUN_RAY_COUNT - i) * DEGREE_360 / MAX_SUN_RAY_COUNT, arcBounds.CenterX(), mSunCoordinateY);
canvas.DrawLine(arcBounds.CenterX(), mSunRayStartCoordinateY, arcBounds.CenterX(), mSunRayEndCoordinateY, mPaint);
canvas.RestoreToCount(sunRaySaveCount);
}
if (mShowStar)
{
if (mStarHolders.Count == 0)
{
InitStarHolders(arcBounds);
}
for (int i = 0; i < mStarHolders.Count; i++)
{
mPaint.SetStyle(Paint.Style.Fill);
mPaint.Alpha = mStarHolders[i].mAlpha;
canvas.DrawCircle(mStarHolders[i].mCurrentPoint.X, mStarHolders[i].mCurrentPoint.Y, mStarRadius, mPaint);
}
}
canvas.RestoreToCount(saveCount);
}
static void UpdateLayout(TextView textview, Element element, Android.Views.View v)
{
if (string.IsNullOrEmpty(textview.Text))
{
return;
}
var margin = AddText.GetMargin(element);
margin.Left = (int)v.Context.ToPixels(margin.Left);
margin.Top = (int)v.Context.ToPixels(margin.Top);
margin.Right = (int)v.Context.ToPixels(margin.Right);
margin.Bottom = (int)v.Context.ToPixels(margin.Bottom);
var textpaint = textview.Paint;
var rect = new Android.Graphics.Rect();
//textpaint.GetTextBounds(textview.Text, 0, textview.Text.Length, rect); // GetTextBound.Width is sometimes a little small less than actual width.
var textWidth = (int)textpaint.MeasureText(textview.Text);
var xPos = 0;
if (AddText.GetHorizontalAlign(element) == Xamarin.Forms.TextAlignment.End)
{
xPos = v.Width - textWidth - textview.PaddingLeft - textview.PaddingRight - (int)margin.Right - 4;
if (xPos < (int)margin.Left)
{
xPos = (int)margin.Left;
}
textview.Right = v.Width - (int)margin.Right;
}
else
{
xPos = (int)margin.Left;
textview.Right = (int)margin.Left + textWidth + textview.PaddingLeft + textview.PaddingRight + 4;
if (textview.Right >= v.Width)
{
textview.Right = v.Width - (int)margin.Right;
}
}
textview.Left = xPos;
var fm = textpaint.GetFontMetrics();
var height = (int)(Math.Abs(fm.Top) + fm.Bottom + textview.PaddingTop + textview.PaddingEnd);
var yPos = AddText.GetVerticalAlign(element) == Xamarin.Forms.TextAlignment.Start ? 0 + (int)margin.Top : v.Height - height - (int)margin.Bottom;
textview.Top = yPos;
textview.Bottom = yPos + height;
textview.Text = textview.Text; // HACK: For some reason, Invalidate is not work. Use reassign text instead of.
}
public void PlatformToSystemException(float x, float y, float width, float height)
{
#if __IOS__
var platform = new CoreGraphics.CGRect(x, y, width, height);
Assert.Throws <ArgumentOutOfRangeException>(() => platform.ToSystemRectangle());
#elif __ANDROID__
var platform = new Android.Graphics.Rect((int)x, (int)y, (int)width, (int)height);
Assert.Throws <ArgumentOutOfRangeException>(() => platform.ToSystemRectangle());
#elif WINDOWS_UWP
var platform = new Windows.Foundation.Rect(x, y, width, height);
Assert.Throws <ArgumentOutOfRangeException>(() => platform.ToSystemRectangle());
#endif
}
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
Android.Graphics.Rect rect = new Android.Graphics.Rect();
Window.DecorView.GetWindowVisibleDisplayFrame(rect);
JitterPhysicsGame.PreferredSize = new Vector2(rect.Width(), rect.Height());
var game = new JitterPhysicsGame();
var view = (View)game.Services.GetService(typeof(View));
SetContentView(view);
game.Run();
}
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
Android.Graphics.Rect rect = new Android.Graphics.Rect();
Window.DecorView.GetWindowVisibleDisplayFrame(rect);
JitterPhysicsGame.PreferredSize = new Vector2(rect.Width(), rect.Height());
var game = new JitterPhysicsGame();
var view = (View)game.Services.GetService(typeof(View));
SetContentView(view);
game.Run();
}
static void UpdateLayout(TextView textview, Element element, Android.Views.View v)
{
if (string.IsNullOrEmpty(textview.Text))
{
return;
}
var margin = AddText.GetMargin(element);
margin.Left = (int)v.Context.ToPixels(margin.Left);
margin.Top = (int)v.Context.ToPixels(margin.Top);
margin.Right = (int)v.Context.ToPixels(margin.Right);
margin.Bottom = (int)v.Context.ToPixels(margin.Bottom);
var textpaint = textview.Paint;
var rect = new Android.Graphics.Rect();
textpaint.GetTextBounds(textview.Text, 0, textview.Text.Length, rect);
var xPos = 0;
if (AddText.GetHorizontalAlign(element) == Xamarin.Forms.TextAlignment.End)
{
xPos = v.Width - rect.Width() - textview.PaddingLeft - textview.PaddingRight - (int)margin.Right - 4;
if (xPos < (int)margin.Left)
{
xPos = (int)margin.Left;
}
textview.Right = v.Width - (int)margin.Right;
}
else
{
xPos = (int)margin.Left;
textview.Right = (int)margin.Left + rect.Width() + textview.PaddingLeft + textview.PaddingRight + 4;
if (textview.Right >= v.Width)
{
textview.Right = v.Width - (int)margin.Right;
}
}
textview.Left = xPos;
var fm = textpaint.GetFontMetrics();
var height = (int)(Math.Abs(fm.Top) + fm.Bottom + textview.PaddingTop + textview.PaddingEnd);
var yPos = AddText.GetVerticalAlign(element) == Xamarin.Forms.TextAlignment.Start ? 0 + (int)margin.Top : v.Height - height - (int)margin.Bottom;
textview.Top = yPos;
textview.Bottom = yPos + height;
}
// In OnLayoutChange, decide size and position of child element.
// For some reason, in layout that was added to container, it does not work all gravity options and all layout options.
public void OnLayoutChange(Android.Views.View v, int left, int top, int right, int bottom, int oldLeft, int oldTop, int oldRight, int oldBottom)
{
if (string.IsNullOrEmpty(_textview.Text))
{
return;
}
var margin = AddText.GetMargin(_element);
margin.Left = (int)Forms.Context.ToPixels(margin.Left);
margin.Top = (int)Forms.Context.ToPixels(margin.Top);
margin.Right = (int)Forms.Context.ToPixels(margin.Right);
margin.Bottom = (int)Forms.Context.ToPixels(margin.Bottom);
var textpaint = _textview.Paint;
var rect = new Android.Graphics.Rect();
textpaint.GetTextBounds(_textview.Text, 0, _textview.Text.Length, rect);
var xPos = 0;
if (AddText.GetHorizontalAlign(_element) == Xamarin.Forms.TextAlignment.End)
{
xPos = v.Width - rect.Width() - _textview.PaddingLeft - _textview.PaddingRight - (int)margin.Right - 4;
if (xPos < (int)margin.Left)
{
xPos = (int)margin.Left;
}
_textview.Right = v.Width - (int)margin.Right;
}
else
{
xPos = (int)margin.Left;
_textview.Right = (int)margin.Left + rect.Width() + _textview.PaddingLeft + _textview.PaddingRight + 4;
if (_textview.Right >= v.Width)
{
_textview.Right = v.Width - (int)margin.Right;
}
}
_textview.Left = xPos;
var fm = textpaint.GetFontMetrics();
var height = (int)(Math.Abs(fm.Top) + fm.Bottom + _textview.PaddingTop + _textview.PaddingEnd);
var yPos = AddText.GetVerticalAlign(_element) == Xamarin.Forms.TextAlignment.Start ? 0 + (int)margin.Top : v.Height - height - (int)margin.Bottom;
_textview.Top = yPos;
_textview.Bottom = yPos + height;
}
public Size MeasureString(string text, Font font)
{
APaint.TextSize = APixels(font.Size);
APaint.SetTypeface(Android.Graphics.Typeface.Default);//TODO
APaint.SetStyle(Android.Graphics.Paint.Style.Stroke);
var fm = APaint.GetFontMetricsInt();
var bounds = new Android.Graphics.Rect();
APaint.GetTextBounds(text, 0, text.Length, bounds);
var width = bounds.Width();
var height = -fm.Top + fm.Bottom;
fm.Dispose();
bounds.Dispose();
return(new Size(width, height));
}
public void PlatformToSystem()
{
#if __IOS__
var platform = new CoreGraphics.CGRect(x, y, width, height);
#elif __ANDROID__
var platform = new Android.Graphics.Rect(x, y, x + width, y + height);
#else
var platform = new Windows.Foundation.Rect(x, y, width, height);
#endif
var system = platform.ToSystemRectangle();
Assert.Equal(x, system.X);
Assert.Equal(y, system.Y);
Assert.Equal(width, system.Width);
Assert.Equal(height, system.Height);
}
public override bool RequestChildRectangleOnScreen(View child, Android.Graphics.Rect rectangle, bool immediate)
{
int screen = IndexOfChild(child);
if (mIgnoreChildFocusRequests && !mScroller.IsFinished)
{
Log.Warn(TAG, "Ignoring child focus request: request " + mCurrentScreen + " -> " + screen);
return(false);
}
if (screen != mCurrentScreen || !mScroller.IsFinished)
{
SnapToScreen(screen);
return(true);
}
return(false);
}
ARect GetViewRect(int index)
{
var holder = _recyclerView.FindViewHolderForAdapterPosition(index);
var view = holder?.ItemView;
if (view == null)
{
return(null);
}
var viewRect = new ARect();
view.GetGlobalVisibleRect(viewRect);
return(viewRect);
}
private int GetCharacterIndexAtPoint(Point point)
{
point.X -= LogicalToPhysicalPixels(Padding.Left);
point.Y -= LogicalToPhysicalPixels(Padding.Top);
var layout = _arrangeLayout.Layout;
var rect = new Android.Graphics.Rect(0, 0, layout.Width, layout.Height);
if (rect.Contains((int)point.X, (int)point.Y))
{
int line = layout.GetLineForVertical((int)point.Y);
int offset = layout.GetOffsetForHorizontal(line, (int)point.X);
return(offset);
}
return(-1);
}
public void DrawImage(Image image, int x, int y, Rectangle source, GraphicsUnit gu)
{
Flush();
APaint.Flags = (Android.Graphics.PaintFlags)0;
var sa = source.ToA();
var da = new Android.Graphics.Rect(x,y, x+source.Width, y+source.Height);
ACanvas.DrawBitmap((image as Bitmap).ABitmap, sa, da, APaint);
da.Dispose();
sa.Dispose();
}
public void DrawImage(Image image, Rectangle to, int fromx, int fromy, int fromw, int fromh, GraphicsUnit gu, ImageAttributes ia)
{
Flush();
APaint.Flags = (Android.Graphics.PaintFlags)0;
var sa = new Android.Graphics.Rect(fromx, fromy, fromx+fromw, fromy+fromh);
var da = to.ToA();
Android.Graphics.Paint p = null;
Android.Graphics.ColorMatrixColorFilter cmf = null;
if (ia != null && ia.GetColorMatrix() != null){
p = new Android.Graphics.Paint(APaint);
var values = ia.GetColorMatrix().Matrix;
float[] v2 = values[0].Concat(values[1]).Concat(values[2]).Concat(values[3]).ToArray();
cmf = new Android.Graphics.ColorMatrixColorFilter(v2);
p.SetColorFilter(cmf);
}
ACanvas.DrawBitmap((image as Bitmap).ABitmap, sa, da, p == null ? APaint : p);
if (p != null) p.Dispose();
if (cmf != null) cmf.Dispose();
da.Dispose();
sa.Dispose();
}
public Size MeasureString(string text, Font font)
{
APaint.TextSize = APixels(font.Size);
APaint.SetTypeface(Android.Graphics.Typeface.Default);//TODO
APaint.SetStyle(Android.Graphics.Paint.Style.Stroke);
var fm = APaint.GetFontMetricsInt();
var bounds = new Android.Graphics.Rect();
APaint.GetTextBounds(text, 0, text.Length, bounds);
var width = bounds.Width();
var height = -fm.Top + fm.Bottom;
fm.Dispose();
bounds.Dispose();
return new Size(width, height);
}
protected virtual void CreateGraphicBuffers()
{
var Control = this;
if (Control.offBmp == null && this.AndroidView != null){
offBmpWidth = (int)(AndroidView.MeasuredWidth/DownScale);
offBmpHeight = (int)(AndroidView.MeasuredHeight/DownScale);
if (offBmpWidth > 0 && offBmpHeight > 0)
{
Control.offBmp = new Bitmap(offBmpWidth, offBmpHeight);
Control.offGr = new Graphics(Control.offBmp);
}
srect = new Android.Graphics.Rect(0,0, offBmpWidth, offBmpHeight);
drect = new Android.Graphics.Rect(0,0, AndroidView.MeasuredWidth, AndroidView.MeasuredHeight);
}
}
protected virtual Thickness GetNativePadding()
{
if (this.NativeUIElement.Background == null)
{
return new Thickness(0);
}
Android.Graphics.Rect rect = new Android.Graphics.Rect();
this.NativeUIElement.Background.GetPadding(rect);
Thickness absoluteNativePadding = new Thickness();
absoluteNativePadding.Left = rect.Left + (this.NativeUIElement.Background.MinimumWidth - rect.Left - rect.Right) / 2.0;
absoluteNativePadding.Top = rect.Top + (this.NativeUIElement.Background.MinimumHeight - rect.Top - rect.Bottom) / 2.0;
absoluteNativePadding.Right = rect.Right + (this.NativeUIElement.Background.MinimumWidth - rect.Left - rect.Right) / 2.0;
absoluteNativePadding.Bottom = rect.Bottom + (this.NativeUIElement.Background.MinimumHeight - rect.Top - rect.Bottom) / 2.0;
Thickness dpiNativePadding = new Thickness();
dpiNativePadding.Left = ScreenProperties.ConvertPixelsToDPI((float)absoluteNativePadding.Left);
dpiNativePadding.Top = ScreenProperties.ConvertPixelsToDPI((float)absoluteNativePadding.Top);
dpiNativePadding.Right = ScreenProperties.ConvertPixelsToDPI((float)absoluteNativePadding.Right);
dpiNativePadding.Bottom = ScreenProperties.ConvertPixelsToDPI((float)absoluteNativePadding.Bottom);
return dpiNativePadding;
}
