Exemple #1
0
        //选择不同椭圆对象时触发的事件
        private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            foreach (var w in graphicsList)
            {
                w.PenColor = Color.Red;
            }
            DrawEllipse dw = graphicsList[listBox1.SelectedIndex];

            dw.PenColor = Color.Blue;
            panel1.Refresh();
        }
Exemple #2
0
 //鼠标按下时触发的事件
 private void panel1_MouseDown(object sender, MouseEventArgs e)
 {
     if (e.Button == MouseButtons.Left)
     {
         id++;
         DrawEllipse w = new DrawEllipse(e.X, e.Y, 1, 1, Color.Red);
         graphicsList.Add(w);
         listBox1.Items.Add("椭圆对象:" + id.ToString());
         panel1.Refresh();
     }
 }
Exemple #3
0
 //鼠标移动时触发的事件
 private void panel1_MouseMove(object sender, MouseEventArgs e)
 {
     if (e.Button == MouseButtons.Left)
     {
         if (graphicsList.Count() > 0)
         {
             //获得泛型列表的最后一个元素
             DrawEllipse w = graphicsList.Last();
             int         x = w.Rect.X;
             int         y = w.Rect.Y;
             w.Rect = new Rectangle(x, y, e.X - x, e.Y - y);
             panel1.Refresh();
         }
     }
 }