private ImageDimension getImageDim(double imageWidth, double ImageHeight)
{
Dictionary<String, double> canvasDim = _getCanvasDim();
ImageDimension result = null;
double canvasWidth = canvasDim["Width"];
double canvasHeight = canvasDim["Height"];
if (imageWidth > ImageHeight)
{
// 水平照片
double newHeight = canvasWidth * ImageHeight / imageWidth;
result = new ImageDimension(canvasWidth, newHeight, 0, (canvasHeight - newHeight) / 2, true);
if (newHeight > canvasHeight)
{
double newWidth = canvasHeight * imageWidth / ImageHeight;
// 这里还是垂直照片
result = new ImageDimension(newWidth, canvasHeight, (canvasWidth - newWidth) / 2, 0, false);
}
}
else
{
// 垂直照片
double newWidth = canvasHeight * imageWidth / ImageHeight;
result = new ImageDimension(newWidth, canvasHeight, (canvasWidth - newWidth) / 2, 0, false);
}
return result;
}
internal void setDisplayImage(BitmapSource bitmapImage)
{
double _imageW = bitmapImage.Width;
double _imageH = bitmapImage.Height;
theCanvas.Cursor = Cursors.Cross;
Dictionary<String, double> canvasDim = _getCanvasDim();
imageDimension = getImageDim(_imageW, _imageH);
Console.WriteLine(String.Format("Display image {0}X{1}", _imageW, _imageH));
theImage.Source = bitmapImage;
theImage.Width = imageDimension.width;
theImage.Height = imageDimension.height;
Canvas.SetLeft(theImage, imageDimension.left);
Canvas.SetTop(theImage, imageDimension.top);
PrintCatImage.updateImageCtrl(theImage);
}