對於web方向的工做流,一直在用gooflow對於目前個人winform開發平臺卻沒有較好的工做流組件。html
針對目前的項目經驗告訴咱們。一個工做流控件是很必要的。 固然在winform方面的工做流第三方組件在網上找了好久,也沒有發現本身比較心儀的組件。 web
對於工做流組件經過web方式來實現具備絕對的優點。個人這套winform平臺固然也不能少了工做流組件。 post
經過winform來實現本身的工做流組件,目前我想到的指能經過GDI+重繪的方式來實現工做流的方案。this
說幹就幹,以下圖這是我經過GDI+繪製的工做流控件: url
設計思想:spa
控件中咱們須要一些定義的節點:如開始、結束、自定義節點、畫線,和一個內容畫布組成
經過抽象出線、點、以及item。進行重繪。
畫布進行雙緩衝來解決繪製時致使的出線閃屏問題。 設計
簡單介紹:orm
畫布中的網格繪製方法:htm
var gridPen = new Pen(Color.Silver) { DashStyle = DashStyle.Custom, DashPattern = new float[] { 2f, 2f } }; for (int column = 0; column < (int)Math.Ceiling((double)this.Width / (double)gridAverage); column++) { bufferGraphics.DrawLine(gridPen, new Point(column * gridAverage, 0), new Point(column * gridAverage, this.Height)); } for (int row = 0; row < (int)Math.Ceiling((double)this.Height / (double)gridAverage); row++) { bufferGraphics.DrawLine(gridPen, new Point(0, row * gridAverage), new Point(this.Width, row * gridAverage)); }
繪製節點抽象類型代碼:blog
public enum ItemType { /// <summary> /// 開始 /// </summary> Start, /// <summary> /// 工做流 /// </summary> Custom, /// <summary> /// 線 /// </summary> Line, /// <summary> /// 結束 /// </summary> End }
繪製連線
public void DrawLine(Graphics grp, Pen pen) { if (m_startPoint == null || m_endPoint == null) return; var startX = m_startPoint.ItemLocate.X + m_startPoint.ItemImage.Width / 2; var startY = m_startPoint.ItemLocate.Y + m_startPoint.ItemImage.Height / 2; var endX = m_endPoint.ItemLocate.X + m_endPoint.ItemImage.Width / 2; var endY = m_endPoint.ItemLocate.Y + m_endPoint.ItemImage.Height / 2; #region 計算開始點位置 if (m_startPoint.ItemLocate.X < m_endPoint.ItemLocate.X) { if (m_startPoint.ItemLocate.Y < m_endPoint.ItemLocate.Y - m_startPoint.ItemLocate.Y) { startX = m_startPoint.ItemLocate.X + m_startPoint.ItemImage.Width / 2; startY = m_startPoint.ItemLocate.Y + m_startPoint.ItemImage.Height; } else if (m_startPoint.ItemLocate.Y < m_endPoint.ItemLocate.Y + m_endPoint.ItemImage.Height) { startX = m_startPoint.ItemLocate.X + m_startPoint.ItemImage.Width; startY = m_startPoint.ItemLocate.Y + m_startPoint.ItemImage.Height / 2; } else { startX = m_startPoint.ItemLocate.X + m_startPoint.ItemImage.Width / 2; startY = m_startPoint.ItemLocate.Y; } } else { if (m_startPoint.ItemLocate.Y < m_endPoint.ItemLocate.Y - m_startPoint.ItemLocate.Y) { startX = m_startPoint.ItemLocate.X + m_startPoint.ItemImage.Width / 2; startY = m_startPoint.ItemLocate.Y + m_startPoint.ItemImage.Height; } else if (m_startPoint.ItemLocate.Y < m_endPoint.ItemLocate.Y + m_endPoint.ItemImage.Height) { startX = m_startPoint.ItemLocate.X; startY = m_startPoint.ItemLocate.Y + m_startPoint.ItemImage.Height / 2; } else { startX = m_startPoint.ItemLocate.X + m_startPoint.ItemImage.Width / 2; startY = m_startPoint.ItemLocate.Y; } } #endregion #region 計算結束點位置 if (m_startPoint.ItemLocate.X < m_endPoint.ItemLocate.X) { if (m_startPoint.ItemLocate.Y < m_endPoint.ItemLocate.Y - m_startPoint.ItemLocate.Y) { endX = m_endPoint.ItemLocate.X + m_endPoint.ItemImage.Width / 2; endY = m_endPoint.ItemLocate.Y; } else if (m_startPoint.ItemLocate.Y < m_endPoint.ItemLocate.Y + m_endPoint.ItemImage.Height) { endX = m_endPoint.ItemLocate.X; endY = m_endPoint.ItemLocate.Y + m_endPoint.ItemImage.Height / 2; } else { endX = m_endPoint.ItemLocate.X + m_endPoint.ItemImage.Width / 2; endY = m_endPoint.ItemLocate.Y + m_endPoint.ItemImage.Height; } } else { if (m_startPoint.ItemLocate.Y < m_endPoint.ItemLocate.Y - m_startPoint.ItemLocate.Y) { endX = m_endPoint.ItemLocate.X + m_endPoint.ItemImage.Width / 2; endY = m_endPoint.ItemLocate.Y; } else if (m_startPoint.ItemLocate.Y < m_endPoint.ItemLocate.Y + m_endPoint.ItemImage.Height) { endX = m_endPoint.ItemLocate.X + m_endPoint.ItemImage.Width; endY = m_endPoint.ItemLocate.Y + m_endPoint.ItemImage.Height / 2; } else { endX = m_endPoint.ItemLocate.X + m_endPoint.ItemImage.Width / 2; endY = m_endPoint.ItemLocate.Y + m_endPoint.ItemImage.Height; } } #endregion var startPoint = new Point(startX, startY); var endPoint = new Point(endX, endY); grp.DrawLine(pen, startPoint, endPoint); }
經過一點一滴的付出,每一個時間點都會看到他的完善。同時也期待着的他的成長。
Winform快速開發平臺系列:
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