private void gifPart_ValueChanged(object sender, EventArgs e)
{
UpdatePreview();
GifPart part = (sender as IGifCtrl).GifPart;
ListViewItem item = null;
foreach (ListViewItem i in lstParts.Items)
{
if (i.Tag == part)
{
item = i;
break;
}
}
if (item != null)
{
UpdateListViewItem(item, part);
}
}
private void UpdateListViewItem(ListViewItem item, GifPart part)
{
if (part is GifPartHeader)
{
item.Text = "Header";
item.ImageIndex = 0;
}
else if (part is GifPartLwzImage)
{
GifPartLwzImage img = part as GifPartLwzImage;
item.Text = string.Format("Image [{0}x{1} @{2}x{3}]", img.Width, img.Height, img.Left, img.Top);
item.ImageIndex = 1;
}
else if (part is GifPartMetaData.ApplicationData)
{
GifPartMetaData.ApplicationData app = part as GifPartMetaData.ApplicationData;
item.Text = string.Format("AppData [{0}]", app.AppIdentifier);
item.ImageIndex = 2;
}
else if (part is GifPartMetaData.Loop)
{
GifPartMetaData.Loop loop = part as GifPartMetaData.Loop;
item.Text = string.Format("AppData [Repeat: {0}]", loop.Iterations);
item.ImageIndex = 2;
}
else if (part is GifPartMetaData.Comment)
{
GifPartMetaData.Comment cmt = part as GifPartMetaData.Comment;
item.Text = string.Format("Comment [{0} bytes]", cmt.Content.Length);
item.ImageIndex = 3;
}
else if (part is GifPartMetaData.GraphicsControl)
{
GifPartMetaData.GraphicsControl ctrl = part as GifPartMetaData.GraphicsControl;
item.Text = string.Format("Control [Trans:{0}, Delay:{1}]", ctrl.UseTransparency ? "1" : "0", ctrl.UseUserInput ? "User" : ((ctrl.DelayTime).ToString() + "ms"));
item.ImageIndex = 4;
}
else if (part is GifPartMetaData.TextDraw)
{
GifPartMetaData.TextDraw txt = part as GifPartMetaData.TextDraw;
string txtt = txt.Text;
item.Text = string.Format("Text [{2}, @{0}x{1}]", txt.Left, txt.Width, txtt.Length > 10 ? (txtt.Substring(0, 8) + "...") : txtt);
item.ImageIndex = 5;
}
else if (part is GifPartMetaData)
{
GifPartMetaData mta = part as GifPartMetaData;
item.Text = string.Format("Unknown [{0}]", mta.MetaType);
item.ImageIndex = 6;
}
else if (part is GifPartTerminator)
{
item.Text = "EOF";
item.ImageIndex = 7;
}
else if (part is GifPartGarbageData)
{
GifPartGarbageData grb = part as GifPartGarbageData;
item.Text = "Garbage data";
item.ImageIndex = 8;
}
}
private void UpdateExistingList()
{
if (this.InvokeRequired)
{
this.Invoke(new Action(UpdateList));
return;
}
SuspendLayout();
ListViewItem item;
for (int i = 0; i < _wrapper.Count; i++)
{
GifPart part = _wrapper[i];
if (lstParts.Items.Count <= i)
{
// Item count too low -> Append new item
item = new ListViewItem();
UpdateListViewItem(item, _wrapper[i]);
item.SubItems.Add(_wrapper[i].Length.ToString());
item.Tag = _wrapper[i];
lstParts.Items.Add(item);
}
else if (lstParts.Items[i].Tag != _wrapper[i])
{
// Item at this position does not match -> ...
#region Find item index
int index = -1;
for (int x = 0; x < lstParts.Items.Count; x++)
{
if (lstParts.Items[x].Tag == part)
{
index = x;
break;
}
}
#endregion
if (index == -1)
{
// The item is not included yet -> Insert new item
item = new ListViewItem();
UpdateListViewItem(item, _wrapper[i]);
item.SubItems.Add(_wrapper[i].Length.ToString());
item.Tag = _wrapper[i];
lstParts.Items.Insert(i, item);
}
else
{
// Item found at a different location -> Update and relocated
item = lstParts.Items[index];
UpdateListViewItem(item, part);
lstParts.Items.RemoveAt(index);
lstParts.Items.Insert(i, item);
}
}
else
{
// Correct item at the correct position -> Update
item = lstParts.Items[i];
UpdateListViewItem(item, part);
}
}
ResumeLayout();
}