private void scrollBar_ValueChanged(object sender, EventArgs e)
{
using (ControlTransaction.Layout(this, false))
{
var value = this.scrollBar.Value;
for (var i = 0; i < this.pictureBox.Count; i++)
{
this.pictureBox[i].Visible = (i == value);
}
}
}
/// <summary>
/// 表示するサムネイルの数を設定する
/// </summary>
/// <param name="count">表示するサムネイルの数</param>
protected void SetThumbnailCount(int count)
{
if (count == 0 && this.pictureBox.Count == 0)
{
return;
}
using (ControlTransaction.Layout(this.panelPictureBox, false))
{
this.panelPictureBox.Controls.Clear();
foreach (var picbox in this.pictureBox)
{
var memoryImage = picbox.Image;
filter.Unregister(picbox);
picbox.MouseWheel -= this.pictureBox_MouseWheel;
picbox.DoubleClick -= this.pictureBox_DoubleClick;
picbox.Dispose();
memoryImage?.Dispose();
// メモリリーク対策 (http://stackoverflow.com/questions/2792427#2793714)
picbox.ContextMenuStrip = null;
}
this.pictureBox.Clear();
this.scrollBar.Maximum = (count > 0) ? count - 1 : 0;
this.scrollBar.Value = 0;
for (int i = 0; i < count; i++)
{
var picbox = CreatePictureBox("pictureBox" + i);
picbox.Visible = (i == 0);
picbox.MouseWheel += this.pictureBox_MouseWheel;
picbox.DoubleClick += this.pictureBox_DoubleClick;
filter.Register(picbox);
this.panelPictureBox.Controls.Add(picbox);
this.pictureBox.Add(picbox);
}
}
}