我使用图片框创建了我的桁架类实例的视觉效果。我通过直接绘制到paint事件中的图片框来创建视觉效果。该方法看起来像这样
private void pictureBox1_Paint(object sender, PaintEventArgs e)
{
if (isDraw)
{
//Preparing to draw
Graphics g = e.Graphics;
g.SmoothingMode = SmoothingMode.AntiAlias;
g.InterpolationMode = InterpolationMode.Bicubic;
RunEntry entry = this.passedHistory.SelectedItem as RunEntry;
AnsFile objToDraw = entry.FileRead;
Pen pen = new Pen(Color.Black);
//Getting size of bitmap
int maxWidth = 0, maxHeight = 0;
foreach (AnsJoint joint in objToDraw.AnsJoints)
{
if (joint.Location.X.Length > maxWidth)
{
maxWidth = (int)joint.Location.X.Length;
}
if (joint.Location.Y.Length > maxHeight)
{
maxHeight = (int)joint.Location.Y.Length;
}
}
//Drawing joints
foreach (AnsJoint joint in objToDraw.AnsJoints)
{
PointF jointPoint = this.ToCartesian(new PointF((float)joint.Location.X.Length - 4f, (float)joint.Location.Y.Length + 10f), maxHeight);
e.Graphics.DrawString(joint.JointID.ToString(), new Font(FontFamily.GenericMonospace, 6f, FontStyle.Regular, GraphicsUnit.Point, 1, false), Brushes.Black, jointPoint);
}
//Draw the panels and links
foreach (AnsMember member in objToDraw.AnsMembers)
{
List<AnsPanel> panels = member.Panels; //Drawing the panels
foreach (AnsPanel pan in panels)
{
pen.Color = Color.Red;
PointF p1 = this.ToCartesian(new PointF((float)pan.I.Location.X.Length, (float)pan.I.Location.Y.Length), maxHeight);
PointF p2 = this.ToCartesian(new PointF((float)pan.J.Location.X.Length, (float)pan.J.Location.Y.Length), maxHeight);
g.DrawEllipse(pen, p1.X - 2.5f, p1.Y - 2.5f, 5, 5);
g.DrawEllipse(pen, p2.X - 2.5f, p2.Y - 2.5f, 5, 5);
g.DrawEllipse(pen, p1.X - 3, p1.Y - 3.3f, 5, 5);
g.DrawEllipse(pen, p2.X - 3, p2.Y - 3.3f, 5, 5);
pen.Color = Color.Black;
g.DrawLine(pen, p1, p2);
}
List<AnsLink> links = member.Links; //Drawing the links
foreach (AnsLink link in links)
{
PointF p1 = this.ToCartesian(new PointF((float)link.I.Location.X.Length, (float)link.I.Location.Y.Length), maxHeight);
PointF p2 = this.ToCartesian(new PointF((float)link.J.Location.X.Length, (float)link.J.Location.Y.Length), maxHeight);
g.FillEllipse(Brushes.Green, p1.X - 1.5f, p1.Y - 1.5f, 3, 3);
g.FillEllipse(Brushes.Green, p2.X - 1.5f, p2.Y - 1.5f, 3, 3);
g.DrawLine(pen, p1, p2);
}
}
g.ScaleTransform(.5f, .5f);
pictureBox1.Tag = entry.FileName;
}
}
这产生了我期待
的结果除了我希望桁架图像可以扩展以更多地填充图片框。我将ScaleTransform调用添加到paint事件方法的末尾,但这似乎没有任何影响,因为图片大小相同,有或没有调用。如何将我在图片框上绘制的内容缩放到图片框的大小?
答案 0 :(得分:1)
在绘图前致电ScaleTransform
。您可以像这样计算所需的比例因子:
// place this code after the calculation of maxWidth and maxHeight
// but before the drawing code
PictureBox p = (PictureBox)sender;
float scaleFactor = Math.Min(
((float)p.Width) / maxWidth,
((float)p.Height) / maxHeight
);
g.ScaleTransform(scaleFactor, scaleFactor);