private void SetupDrawingCanvas()
{
path = XForm.GetValue(Binding.nodeset);
if (!string.IsNullOrEmpty(path))
{
Bitmap bitmap = BitmapFactory.DecodeFile(path);
//grab the exif note if there is one
ExifInterface exifData = new ExifInterface(path);
string note = exifData.GetAttribute(ExifInterface.TagImageDescription);
if (note != null)
{
EditExif.Text = note;
}
//grab orientation if there is one, some images from the net may not even have it
int orientation = exifData.GetAttributeInt(Android.Media.ExifInterface.TagOrientation, 1);
switch (orientation)
{
case 6:
bitmap = BitmapHelpers.RotateBitmap(bitmap, 90f);
break;
case 3:
bitmap = BitmapHelpers.RotateBitmap(bitmap, 180f);
break;
case 8:
bitmap = BitmapHelpers.RotateBitmap(bitmap, 270f);
break;
}
Dims = new int[] { bitmap.Width, bitmap.Height };
//this one liner does all, gets the lower of the two to determine what to scale it by
decimal scale = Math.Min(Decimal.Divide(MainCanvas.Width, Dims[0]), Decimal.Divide(MainCanvas.Height, Dims[1]));
int width = (int)(Dims[0] * scale);
int height = (int)(Dims[1] * scale);
//background image
if (Control.appearance.ToLower() == "annotate" || Control.appearance.ToLower() == "textannotate")
{
bitmap = Bitmap.CreateScaledBitmap(bitmap, width, height, true);
BackgroundImage.SetImageBitmap(bitmap);
}
//canvas image
if (TempBitmap != null)
{
canvasBitmap = Bitmap.CreateScaledBitmap(TempBitmap, width, height, true);
}
else
{
canvasBitmap = Bitmap.CreateBitmap(width, height, Bitmap.Config.Argb8888);
}
if (dv == null)
{
dv = new DrawingView(this, canvasBitmap, 10, BackgroundImage);
}
if (Control.appearance.ToLower() != "signature")
{
SetupEvents();
}
var layoutParams = new RelativeLayout.LayoutParams(width, height);
layoutParams.AddRule(LayoutRules.CenterInParent);
dv.LayoutParameters = layoutParams;
MainCanvas.AddView(dv);
GC.Collect();
}
else if (Control.appearance.ToLower() == "signature" || Control.appearance.ToLower() == "draw")
{
int width = MainCanvas.Width;
int height = MainCanvas.Height;
//canvas image
if (TempBitmap != null)
{
canvasBitmap = Bitmap.CreateScaledBitmap(TempBitmap, width, height, true);
}
else
{
canvasBitmap = Bitmap.CreateBitmap(width, height, Bitmap.Config.Argb8888);
}
if (dv == null)
{
dv = new DrawingView(this, canvasBitmap, 10, BackgroundImage);
}
if (Control.appearance.ToLower() != "signature")
{
SetupEvents();
}
var layoutParams = new RelativeLayout.LayoutParams(width, height);
layoutParams.AddRule(LayoutRules.CenterInParent);
dv.LayoutParameters = layoutParams;
MainCanvas.AddView(dv);
GC.Collect();
}
}
