private void btnShowPicture_Click(object sender, EventArgs e)
{
if (_canvasForm == null)
{
_canvasForm = new CanvasForm();
_canvasForm.FormClosing += canvasForms_Closed;
_canvasForm.Show();
_canvasForm.SetCanvas(_canvas);
}
else
{
_canvasForm.Close();
}
}
private void canvasForms_Closed(object sender, EventArgs e)
{
_canvasForm.FormClosed -= canvasForms_Closed;
_canvasForm = null;
}