private void DrawingForm_MounseUP(object sender, MouseEventArgs e) //鼠标抬起事件
{
Graphics graphics = DrawingForm.CreateGraphics();
if (isDrawing)
{
switch (drawTool)
{
case toolBox.line: //画直线
graphics.DrawLine(new Pen(color, size), startPoint, oldPoint);
break;
case toolBox.rectangle: //画矩形
graphics.DrawRectangle(new Pen(color, size), startPoint.X, startPoint.Y, oldPoint.X - startPoint.X, oldPoint.Y - startPoint.Y);
break;
case toolBox.ellipese: //画圆
graphics.DrawEllipse(new Pen(color, size), startPoint.X, startPoint.Y, oldPoint.X - startPoint.X, oldPoint.Y - startPoint.Y);
break;
case toolBox.triangle:
graphics.DrawLine(new Pen(color, size), startPoint, oldPoint);
graphics.DrawLine(new Pen(color, size), startPoint.X, startPoint.Y, (startPoint.X + startPoint.X - oldPoint.X), oldPoint.Y);
graphics.DrawLine(new Pen(color, size), (startPoint.X + startPoint.X - oldPoint.X), oldPoint.Y, oldPoint.X, oldPoint.Y);
graphics.DrawLine(new Pen(color, size), startPoint, startPoint);
graphics.DrawLine(new Pen(color, size), oldPoint, oldPoint);
graphics.DrawLine(new Pen(color, size), (startPoint.X + startPoint.X - oldPoint.X), oldPoint.Y, (startPoint.X + startPoint.X - oldPoint.X), oldPoint.Y);
break;
}
}
isDrawing = false;
}
private void Form1_MouseMove(object sender, MouseEventArgs e) //鼠标移动事件
{
//MessageBox.Show("Yes");
if (isDrawing == true)
{
//MessageBox.Show("Yes again!");
Graphics graphics = DrawingForm.CreateGraphics();
switch (drawTool)
{
case toolBox.pen:
graphics.DrawLine(new Pen(color, size), oldPoint, new Point(e.X, e.Y)); //使用画笔画直线
oldPoint.X = e.X; //更新画图直线的初始坐标
oldPoint.Y = e.Y;
break;
case toolBox.eraser:
graphics.DrawLine(new Pen(Color.White, size), oldPoint, new Point(e.X, e.Y)); //使用白笔画图，覆盖原来画的图
oldPoint.X = e.X;
oldPoint.Y = e.Y;
break;
default:
oldPoint.X = e.X;
oldPoint.Y = e.Y;
break;
}
}
}
private void 新建ToolStripMenuItem_Click(object sender, EventArgs e)
{
Graphics graphics = DrawingForm.CreateGraphics();
if (isSave == true)
{
graphics.Clear(Color.White); //重置画图板
}
else
{
string name = this.Text;
DialogResult result = MessageBox.Show(" 是否将更改保存到" + name, "狐仙魔法书", MessageBoxButtons.YesNoCancel);
switch (result)
{
case DialogResult.Yes: //执行保存操作
保存ToolStripMenuItem_Click(sender, e);
break;
case DialogResult.No: //重置画板
graphics.Clear(Color.White);
isSave = true;
break;
case DialogResult.Cancel: //取消什么都不做
break;
}
}
}
private void 打开ToolStripMenuItem_Click(object sender, EventArgs e)
{
//MessageBox.Show(isSave.ToString());
if (isSave == true)
{
OpenFileDialog openFileDialog = new OpenFileDialog();
openFileDialog.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.Desktop); //默认桌面作为打开文件路径
openFileDialog.Filter = "PNG(*.png)|*.png | GIF(*.gif)|*.gif | ICO(*.ico)|*.ico | JPEG(*.jpg,*.jpeg,*.jpe,*.jfif)|*.jpg;*jpeg;*jpe;*jfif | 所有图片文件|*.png;*.gif;*.bmp;*.wmf;*.ico;*.cur;*.jpg;*.jpeg;*.jpe*,jfif | 所有文件(.)|*.*";
openFileDialog.FilterIndex = 5;
if (openFileDialog.ShowDialog() == DialogResult.OK)
{
Graphics graphic = DrawingForm.CreateGraphics();
Image image = Bitmap.FromFile(openFileDialog.FileName);
graphic.DrawImage(image, this.ClientRectangle);
this.Text = openFileDialog.FileName.Substring(openFileDialog.FileName.IndexOf("//") + 1);
filePath = openFileDialog.FileName;
}
}
}