//重载绘图方法
protected override void OnPaint(PaintEventArgs pe)
{
//使用双缓冲绘图
BufferedGraphicsContext currentContext = BufferedGraphicsManager.Current;
BufferedGraphics bufg = currentContext.Allocate(pe.Graphics, this.ClientRectangle);
Graphics g = bufg.Graphics;
g.Clear(Color.White);
//开启抗锯齿
g.SmoothingMode = SmoothingMode.AntiAlias;
// 计算可现范围，设置滚动条
int frameSizeX = this.Width;
int frameSizeY = this.Height;
if (listDesk != null && listDesk.Count > 0)
{
Desk lastDesk = listDesk[listDesk.Count - 1];
if ((lastDesk.X + lastDesk.width) > frameSizeX)
{
frameSizeX = lastDesk.X + lastDesk.width + 30;
}
if ((lastDesk.Y + lastDesk.height) > frameSizeY)
{
frameSizeY = lastDesk.Y + lastDesk.height + 30;
}
}
foreach (Student std in listStudent)
{
if ((std.X + std.width) > frameSizeX)
{
frameSizeX = std.X + std.width + 30;
}
if ((std.Y + std.height) > frameSizeY)
{
frameSizeY = std.Y + std.height + 30;
}
}
this.AutoScrollMinSize = new Size(frameSizeX, frameSizeY);
paintTransX = this.AutoScrollPosition.X;
paintTransY = this.AutoScrollPosition.Y;
//绘制范围平移
g.TranslateTransform(paintTransX, paintTransY);
//开始绘制
int CandidateStartX = 242; //候选区与教室分界线
//绘制候选区与教室区
g.DrawString("候选区", new Font("宋体", 14), new SolidBrush(Color.Black), 1, 1);
g.DrawLine(new Pen(Color.Black, 5f), new Point(CandidateStartX, 0), new Point(CandidateStartX, this.Height));
g.DrawString("课室", new Font("宋体", 14), new SolidBrush(Color.Black), CandidateStartX + 3, 1);
//绘制学生卡
if (listStudent != null || listStudent.Count > 0)
{
int stdCount = listStudent.Count;
Hashtable hash = new Hashtable();
for (int s = 0; s < stdCount; s++)
{
g.DrawImage(listStudent[s].Shape, listStudent[s].X, listStudent[s].Y);
//重叠学生处理
try{
hash.Add(listStudent[s].X.ToString() + "," + listStudent[s].Y.ToString(), null);
}
catch (Exception)
{
g.FillRectangle(new SolidBrush(Color.FromArgb(150, 0, 220, 0)),
listStudent[s].X,
listStudent[s].Y,
listStudent[s].width,
listStudent[s].height
);
}
}
}
//绘制讲台与课桌
InitDeskAndDais(ref g);
//实际描绘到视图
bufg.Render(pe.Graphics);
g.Dispose();
bufg.Dispose();
}
//绘制课桌与讲台
private void InitDeskAndDais(ref Graphics gDesk)
{
string[] deskColGroup = deskColFormat.Split('/');
if (deskColFormat.Trim() == "" || deskColGroup.Length == 0)
{
return;
}
int steps = deskColGroup.Length;
int[] deskColSteps = new int[steps];
deskCol = 0;
try {
for (int s = 0; s < steps; s++)
{
deskColSteps[s] = int.Parse(deskColGroup[s]);
deskCol += deskColSteps[s];
}
} catch (Exception) {
//MessageBox
return;
}
if (deskRow * deskCol == 0)
{
return;
}
//根据行列数据初始课桌列表
listDesk.Clear();
for (int i = 0; i < deskRow * deskCol; i++)
{
Desk desk = new Desk();
listDesk.Add(desk);
}
//起点位置
int daisStartY = 30;
int deskStartX = 290;
int deskStartY = daisStartY + dais.Height + 25;
//间距
int deskDistX = 15;
int deskDistY = 15;
int colCenter = 0; //讲台中心
//分别绘制
for (int row = 0; row < deskRow; row++)
{
int colPosition = 0;
for (int col = 0; col < deskCol; col++)
{
int order = row * deskCol + col;
if (!listDesk[order].isValued)
{
continue;
}
int px = deskStartX + colPosition;
int py = deskStartY + (listDesk[order].height + deskDistY) * row;
listDesk[order].X = px;
listDesk[order].Y = py;
gDesk.DrawImage(listDesk[order].Shape, px, py);
//移动X位置
colPosition += listDesk[order].width + deskDistX;
//遇到分组时多进一个间距
int rDis = 0;
for (int r = 0; r < deskColSteps.Length - 1; r++)
{
rDis += deskColSteps[r];
if (col == rDis - 1)
{
colPosition += deskDistX;
break;
}
}
}
//确定讲桌中心
colCenter = (colPosition - deskDistX) / 2;
}
//根据课桌中心位置绘制讲台
//int colCenter = deskStartX + (deskDistX * (deskCol-1) + 30) / 2;
int daisStartX = colCenter - dais.Width / 2;
daisStartX = daisStartX < 0? 0: daisStartX;
dais.X = deskStartX + daisStartX;
dais.Y = daisStartY;
gDesk.DrawImage(dais.Shape, dais.X, dais.Y);
//计算打印区域
int printExtend = 20; //扩边范围
int printXmin = listDesk[0].X - printExtend;
int printXmax = listDesk[listDesk.Count - 1].X + listDesk[0].width + printExtend;
int printYmin = dais.Y - printExtend;
int printYmax = listDesk[listDesk.Count - 1].Y + listDesk[0].height + printExtend;
printRange = new Rectangle(printXmin, printYmin, printXmax - printXmin, printYmax - printYmin);
}