private void New()
{
if (isSaved == false)
{
if (MessageBox.Show("尚未保存,真的要新建画板吗?", "新建确认", MessageBoxButton.YesNo) == MessageBoxResult.Yes)
{
canvas1.Children.Clear();
canvas1.InvalidateVisual();
du = new DrawingUIElement();
compositeGraphic.Clear();
canvas1.Children.Add(du);
du_refresh();
isSaved = false;
}
}
else
{
canvas1.Children.Clear();
canvas1.InvalidateVisual();
du = new DrawingUIElement();
compositeGraphic.Clear();
canvas1.Children.Add(du);
du_refresh();
isSaved = false;
}
}
private void Open()
{
if (MessageBox.Show("载入图片将会清空当前内容,真的要载入图片吗?", "警告", MessageBoxButton.YesNo) == MessageBoxResult.Yes)
{
canvas1.Children.Clear();
canvas1.InvalidateVisual();
du = new DrawingUIElement();
compositeGraphic.Clear();
canvas1.Children.Add(du);
du_refresh();
isSaved = false;
OpenFileDialog dlg = new OpenFileDialog();
dlg.CheckFileExists = true;
dlg.Filter = "所有格式 (*.*)|*.*|矢量图 (*.eps)|*.eps|位图 (*.bmp)|*.bmp";
if ((bool)dlg.ShowDialog(this))
{
canvas1.Children.Clear();
try
{
using (FileStream file = new FileStream(dlg.FileName,
FileMode.Open, FileAccess.Read))
{
if (!(dlg.FileName.ToLower().EndsWith(".png") || dlg.FileName.ToLower().EndsWith(".bmp") || dlg.FileName.ToLower().EndsWith(".eps") || dlg.FileName.ToLower().EndsWith(".jpg")))
{
MessageBox.Show("图片格式不符合要求", Title);
}
else
{
Uri url = new Uri(dlg.FileName);
BitmapImage bmp = new BitmapImage(url);
System.Windows.Controls.Image img = new System.Windows.Controls.Image();
img.Source = bmp;
img.Height = canvas1.Height;
img.Width = canvas1.Width;
img.Stretch = Stretch.Uniform;
canvas1.Children.Add(img);
canvas1.Children.Remove(du);
canvas1.Children.Add(du);
file.Close();
}
}
}
catch (Exception exc)
{
MessageBox.Show(exc.Message, Title);
}
}
}
}