private ThumbCache.ThumbInfo GetThumbInfo(int index)
{
if (lruIndices.Contains(index))
{
lruIndices.Remove(index);
}
lruIndices.Add(index);
if (lruIndices.Count > MAX_LRU_SIZE)
{
int indexToEvict = lruIndices[0];
lruIndices.RemoveAt(0);
if (thumbInfoMap.ContainsKey(indexToEvict))
{
thumbInfoMap[indexToEvict].Dispose();
thumbInfoMap.Remove(indexToEvict);
}
}
if (!thumbInfoMap.ContainsKey(index))
{
var item = db.GetImage(index, true);
if (item != null)
{
thumbInfoMap.Add(index, item);
}
return(item);
}
else
{
return(thumbInfoMap[index]);
}
}
private void listView1_DrawItem(object sender, DrawListViewItemEventArgs e)
{
//e.DrawBackground();
e.DrawDefault = true;
//e.DrawText();
Image img = null;
try
{
img = cache.GetImage(e.ItemIndex, true).image;
} catch { }
if (img == null)
{
return;
}
float aspect = (float)img.Width / (float)img.Height;
if (aspect == 0f)
{
aspect = 1f;
}
Rectangle src = new Rectangle(0, 0, img.Width, img.Height);
Rectangle dst;
if (aspect >= 1f)
{
// width >= height
if (img.Width > e.Bounds.Width)
{
dst = new Rectangle(e.Bounds.Left, e.Bounds.Top, e.Bounds.Width, (int)(e.Bounds.Height / aspect));
}
else
{
dst = new Rectangle(e.Bounds.Left + e.Bounds.Width / 2 - img.Width / 2, e.Bounds.Top + e.Bounds.Height / 2 - img.Height / 2, img.Width, img.Height);
}
}
else
{
// height > width
if (img.Height > e.Bounds.Height)
{
dst = new Rectangle(e.Bounds.Left, e.Bounds.Top, (int)(e.Bounds.Width * aspect), e.Bounds.Height);
}
else
{
dst = new Rectangle(e.Bounds.Left + e.Bounds.Width / 2 - img.Width / 2, e.Bounds.Top + e.Bounds.Height / 2 - img.Height / 2, img.Width, img.Height);
}
}
e.Graphics.DrawImage(img, dst, src, GraphicsUnit.Pixel);
}
private void OpenFile(string fileName)
{
try
{
cache = new ThumbCache(fileName);
listViewEntries.LargeImageList = null;
int w = 120;
for (int i = 0; i < 5; i++)
{
try
{
var img = cache.GetImage(i, true);
w = img.image.Width;
if (img.image.Height > w)
{
w = img.image.Height;
}
}
catch { }
}
if (w < 32)
{
w = 32;
}
if (w > 240)
{
w = 240;
}
w += 16;
imageList1.ImageSize = new Size(w, w);
listViewEntries.LargeImageList = imageList1;
listViewEntries.VirtualListSize = cache.ImageCount;
listViewEntries.Invalidate();
this.Text = Application.ProductName + " - " + fileName;
}
catch (Exception ex)
{
MessageBox.Show(this, ex.Message, Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
}
}