protected override void Dispose(bool disposing)
{
base.Dispose(disposing);
if (disposing)
{
if (btnAlpha != null)
{
btnAlpha.Dispose();
}
if (dialogAlpha != null)
{
dialogAlpha.Dispose();
}
btnAlpha = null;
dialogAlpha = null;
}
}
void btnAlpha_Click(object sender, EventArgs e)
{
if (dialogAlpha == null)
{
dialogAlpha = new AlphaDialog(this);
panelAlpha = new AlphaColorPanel();
panelAlpha.AlphaChanged += panelAlpha_AlphaChanged;
dialogAlpha.Controls.Add(panelAlpha);
dialogAlpha.Text = "투명도";
//dialogAlpha.StartPosition = FormStartPosition.CenterParent; // doesn't work
dialogAlpha.StartPosition = FormStartPosition.Manual;
dialogAlpha.ClientSize = panelAlpha.PreferredSize;
Size sz = dialogAlpha.Size;
RECT r = new RECT();
GetWindowRect(handle, ref r);
dialogAlpha.Location = new Point(r.Left + ((r.Right - r.Left) - sz.Width) / 2, r.Top + ((r.Bottom - r.Top) - sz.Height) / 2);
}
Color color = Color.FromArgb(alpha, _color);
panelAlpha.Color = color;
panelAlpha.SetAlpha(color.A);
if (!dialogAlpha.IsHandleCreated || !dialogAlpha.Visible)
{
dialogAlpha.Visible = false; // sometimes IsHandleCreated is reset, so Visible must be reset
dialogAlpha.Show(new SimpleWindow {
Handle = handle
});
}
else
{
if (dialogAlpha.WindowState == FormWindowState.Minimized)
{
dialogAlpha.WindowState = FormWindowState.Normal;
}
dialogAlpha.Activate();
dialogAlpha.BringToFront();
dialogAlpha.Focus();
}
}
