private void ShowImage(IMAGE image)
{
// Create a new temporary bitmap to resize the original image
// The size of this bitmap is the size of the picImage picturebox.
Bitmap tempBitmap = new Bitmap(pbImage.Width, pbImage.Height, PixelFormat.Format24bppRgb);
// Set the resolution of the bitmap to match the original resolution.
tempBitmap.SetResolution(image.imgSource.HorizontalResolution, image.imgSource.VerticalResolution);
// Create a Graphics object to further edit the temporary bitmap
Graphics bmapGraphics = Graphics.FromImage(tempBitmap);
bmapGraphics.Clear(Color.White);
// Set the interpolationmode插值模式 since we are resizing an image here
bmapGraphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
// Draw the original image on the temporary bitmap, resizing it using
// the calculated values of targetWidth and targetHeight.
bmapGraphics.DrawImage(image.imgSource
, new Rectangle(image.targetLeft, image.targetTop, image.targetWidth, image.targetHeight)
, new Rectangle(0, 0, image.imgSource.Width, image.imgSource.Height)
, GraphicsUnit.Pixel);
bmapGraphics.Dispose();
if (toRotate == true)
{
tempBitmap = RotateImage(tempBitmap, angle);
}
pbImage.Image = tempBitmap;
}
private void pbImage_MouseWheel(object sender, MouseEventArgs e)
{
IMAGE imgToZoom = img[picnow];
double ratio;
if (e.Delta > 0)
{
ratio = e.Delta / 60;
}
else
{
double k = e.Delta;
k = -k;
ratio = 80 / k;
}
imgToZoom.targetHeight = (int)(imgToZoom.targetHeight * ratio);
imgToZoom.targetWidth = (int)(imgToZoom.targetWidth * ratio);
imgToZoom.targetTop = (pbImage.Height - imgToZoom.targetHeight) / 2;
imgToZoom.targetLeft = (pbImage.Width - imgToZoom.targetWidth) / 2;
img[picnow] = imgToZoom;
ShowImage(imgToZoom);
}
private void btOpenImage_Click(object sender, EventArgs e)
{
hasimage = true;
OpenFileDialog openFileDia = new OpenFileDialog();
if (openFileDia.ShowDialog() == DialogResult.OK)
{
cnt = 0;
max = 0;
picnow = 0;
string path_Directory = openFileDia.FileName.Substring(0, openFileDia.FileName.LastIndexOf("\\"));
string[] files = System.IO.Directory.GetFiles(path_Directory);
foreach (string filename in files)
{
try
{
string name = filename.Substring(filename.LastIndexOf("\\"), filename.Length - filename.LastIndexOf("\\"));
string filetype = filename.Substring(filename.LastIndexOf("."), filename.Length - filename.LastIndexOf("."));
if (filetype == ".jpg")
{
img[cnt] = new IMAGE(Image.FromFile(path_Directory + name), 0, 0, 0, 0);
cnt++;
if (filename == openFileDia.FileName)
{
picnow = cnt - 1;
}
}
}
catch { }
}
max = cnt;
cnt = picnow;
btSaveImg.Enabled = true;
btLastImg.Enabled = true;
btNextImg.Enabled = true;
this.ResizeAndDisplayImage(img[picnow]);
}
}
private void ResizeAndDisplayImage(IMAGE OriginalImage)
{
this.pbImage.BackColor = Color.White;
if (OriginalImage == null)
{
return;
}
int sourceWidth = OriginalImage.imgSource.Width;
int sourceHeight = OriginalImage.imgSource.Height;
double ratio;
//Calculate targetWidth and targetHeight, so that the image will fit into the pictureBox
if ((sourceWidth != pbImage.Width) || (sourceHeight != pbImage.Height))
{
if (sourceHeight > OriginalImage.targetHeight)
{
if (sourceHeight > pbImage.Height || sourceWidth > pbImage.Width)
{
OriginalImage.targetHeight = pbImage.Height;
ratio = (double)OriginalImage.targetHeight / sourceHeight;
OriginalImage.targetWidth = (int)(sourceWidth * ratio);
if (pbImage.Width < OriginalImage.targetWidth)
{
OriginalImage.targetWidth = pbImage.Width;
ratio = (double)OriginalImage.targetWidth / sourceWidth;
OriginalImage.targetHeight = (int)(sourceHeight * ratio);
}
else if (pbImage.Height < OriginalImage.targetHeight)
{
OriginalImage.targetHeight = pbImage.Height;
ratio = (double)OriginalImage.targetHeight / sourceHeight;
OriginalImage.targetWidth = (int)(sourceWidth * ratio);
}
}
else
{
OriginalImage.targetHeight = sourceHeight;
OriginalImage.targetWidth = sourceWidth;
}
}
OriginalImage.targetTop = (pbImage.Height - OriginalImage.targetHeight) / 2;
OriginalImage.targetLeft = (pbImage.Width - OriginalImage.targetWidth) / 2;
OriginalImage.targetTop = OriginalImage.targetTop > 0 ? OriginalImage.targetTop : 0;
OriginalImage.targetLeft = OriginalImage.targetLeft > 0 ? OriginalImage.targetLeft : 0;
}
else
{
// Calculate the targetTop and targetLeft values, to center the image
OriginalImage.targetTop = (pbImage.Height - sourceHeight) / 2;
OriginalImage.targetLeft = (pbImage.Width - sourceWidth) / 2;
}
ShowImage(OriginalImage);
this.updateImgInfo(OriginalImage.imgSource);
}