private void _listBoxController_SelectedItemChanged(object sender, EventArgs e)
{
_selectedImageResource = _listBoxController.GetSelectedItem <ImageResourceInfo>();
if (_selectedImageResource == null)
{
if (this.pictureBoxPreview.Image != null)
{
this.pictureBoxPreview.Image = null;
}
return;
}
if (_imageCache.Keys.Contains(_selectedImageResource) == false)
{
Image thumbnailImage = DrawingTool.GetAutoScaleThumbnailImage(
_selectedImageResource.GetImage(), this.pictureBoxPreview.Width, this.pictureBoxPreview.Height);
_imageCache.Add(_selectedImageResource, thumbnailImage);
}
this.pictureBoxPreview.Image = _imageCache[_selectedImageResource];
}