VectorDraw Developer Framework(VDF)是一個用於應用程序可視化的圖形引擎庫。有了VDF提供的功能,您可以輕鬆地創建、編輯、管理、輸出、輸入和打印2D和3D圖形文件。
問:
我如何像插入塊對話框中那樣獲得vdBlock的圖像預覽?
答:
vdBlocks內部不包含它們的預覽,因此您需要使用vdRender快速創建一個。
在表單中添加一個vdFramed / vdScrollable / vdBase控件,一個按鈕和一個圖片框,打開一個圖形並嘗試如下代碼:
private void button1_Click(object sender, EventArgs e) { doc = vdFramedControl1.BaseControl.ActiveDocument; vdBlock blk = doc.Blocks.FindName("VDDIM_DEFAULT"); // try here some block names that exist in the drawing you opened if (blk == null) return; // block not found // imgblock is a picturebox private System.Windows.Forms.PictureBox imgblock; added to the form int blockwid = imgblock.Width; int blockhei = imgblock.Height; Bitmap image = new Bitmap(blockwid, blockhei); VectorDraw.Render.vdRender rend = new VectorDraw.Render.GDIPlusRender(null); rend.graphics = Graphics.FromImage(image); rend.UpperLeft = new Point(0, 0); rend.Width = blockwid; rend.Height = blockhei; rend.ViewSize = blockhei; rend.ViewCenter = new VectorDraw.Geometry.gPoint((double)rend.Width / 2.0d, (double)rend.Height / 2.0d); rend.Init(); rend.StartDraw(false); rend.Clear(doc.Palette.Background); VectorDraw.Render.vdGdiPenStyle ps = new VectorDraw.Render.vdGdiPenStyle(); ps.LineType = doc.LineTypes.Solid.GetgrLineType(); ps.color = Color.Black; rend.PushPenstyle(ps); vdInsert ins = new vdInsert(); ins.SetUnRegisterDocument(doc); ins.setDocumentDefaults(); ins.Block = blk; double hei = ins.BoundingBox.Height; double wid = ins.BoundingBox.Width; double max = Math.Max(hei, wid); double min = Math.Min(hei, wid); ins.InsertionPoint = new VectorDraw.Geometry.gPoint(0.0d, 0.0d, 0.0d); rend.ViewSize = max * 5.0 / 4.0; rend.ViewCenter = new VectorDraw.Geometry.gPoint(ins.BoundingBox.MidPoint); ins.Update(); ins.Draw(rend); rend.PopPenstyle(); rend.EndDraw(); rend.graphics.Dispose(); rend.graphics = null; imgblock.Image = image; }
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