新手入門必看：VectorDraw 常見問題整理大全（十）

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VectorDraw Developer Framework（VDF）是一個用于應(yīng)用程序可視化的圖形引擎庫。有了VDF提供的功能，您可以輕松地創(chuàng)建、編輯、管理、輸出、輸入和打印2D和3D圖形文件。該庫還支持許多矢量和柵格輸入和輸出格式，包括本地PDF和SVG導(dǎo)出。

【VectorDraw Developer Framework最新版下載】

VectorDraw web library (javascript)是一個矢量圖形庫。VectorDraw web library (javascript)不僅能打開CAD圖紙，而且能顯示任何支持HTML5標準平臺上的通用矢量對象，如Windows，安卓，iOS和Linux。無需任何安裝，VectorDraw web library (javascript)就可以運行在任何支持canvas標簽和Javascript的主流瀏覽器（Chrome, Firefox, Safari, Opera, Dolphin, Boat等等）中。

【VectorDraw web library (javascript)最新版下載】

一. 將數(shù)據(jù)對象從表示繪圖的列表框拖放到VectorDraw Control作為插入對象

問：如何將數(shù)據(jù)對象從表示繪圖的列表框拖放到VectorDraw Control作為插入對象？

答：參見以下代碼：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

using VectorDraw.Actions;
using VectorDraw.Geometry;
using VectorDraw.Professional.vdPrimaries;
using VectorDraw.Professional.vdCollections;
using VectorDraw.Professional.vdObjects;
using VectorDraw.Professional.ActionUtility;
using VectorDraw.Professional.vdFigures;

namespace WindowsApplication1
{
    //Example of Drag & Drop a data object from a List box that represents a Drawing, in to VectorDraw Control as Insert object.
    public partial class Form1 : Form
    {
        
        public vdInsert Winsert = null;
        public Form1()
        {
            InitializeComponent();
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            vdDest.vdDragEnter += new VectorDraw.Professional.Control.DragEnterEventHandler(vdDest_vdDragEnter);
            vdDest.vdDragDrop += new VectorDraw.Professional.Control.DragDropEventHandler(vdDest_vdDragDrop);
            vdDest.vdDragOver +=new VectorDraw.Professional.Control.DragOverEventHandler(vdDest_vdDragOver);
            vdDest.vdDragLeave += new VectorDraw.Professional.Control.DragLeaveEventHandler(vdDest_vdDragLeave);
            vdDest.DrawOverAll += new VectorDraw.Professional.Control.DrawOverAllEventHandler(vdDest_DrawOverAll);
        
        }
        void vdDest_DrawOverAll(object sender, VectorDraw.Render.vdRender render, ref bool cancel)
        {
            if (Winsert == null) return;
            //If this event is called when a DragDrop action is active (from  vdDest_vdDragOver) then we repaint the screen with the Insret object in the curent Cursor position.
            gPoint curpt = vdDest.ActiveDocument.CCS_CursorPos();
            Winsert.InsertionPoint = curpt;
            Winsert.Update();
            render.UnLock();//use Unlock / Lock in order the rendering be smoother as GDIPlusRender 
            Winsert.Draw(render);
            render.Lock();
        }
        void vdDest_vdDragLeave(EventArgs e, ref bool cancel)
        {
            //Leaving the VectorDraw control 
            cancel = true;
            Winsert = null;
        }
        void vdDest_vdDragEnter(DragEventArgs drgevent, ref bool cancel)
        {
            //A drag drop action is active and the cursor is just activate in the VectorDraw screen
            cancel = true;

            //get the data object and check if is represents a drawing file.
            DataObject dataobject = drgevent.Data as DataObject;
            if (dataobject == null) return;
            System.Collections.Specialized.StringCollection strings = dataobject.GetFileDropList();
            if (strings == null || strings.Count != 1) return;
            string filename = strings[0];
            string blockname = System.IO.Path.GetFileNameWithoutExtension(filename);//get th block name of the file
            vdBlock block = vdDest.ActiveDocument.Blocks.FindName(blockname);//if the block already exist in the drawing then we do not redifine it.
            if (block == null)
            {
                Cursor curCursor = Cursor;
                Cursor = Cursors.WaitCursor;
                block = vdDest.ActiveDocument.Blocks.AddFromFile(filename, false);//add the block in the drawing
                Cursor = curCursor;
            }
            if (block == null) return;
            drgevent.Effect = DragDropEffects.Copy;

            //create an insert object but we do not add it in the Document ActiveLayout entities.
            Winsert = new vdInsert();
            Winsert.SetUnRegisterDocument(vdDest.ActiveDocument);
            Winsert.setDocumentDefaults();
            Winsert.Block = block;
            Winsert.CreateDefaultAttributes();
            Winsert.InsertionPoint = vdDest.ActiveDocument.CCS_CursorPos();
            Winsert.Update();
            
        }
        void vdDest_vdDragDrop(DragEventArgs drgevent, ref bool cancel)
        {
            cancel = true;
            if (Winsert == null) return;
            //Add the insert object in to Document ActiveLayout entities.
            Winsert.Invalidate();
            Winsert.InsertionPoint = vdDest.ActiveDocument.CCS_CursorPos();
            Winsert.Update();
            vdDest.ActiveDocument.ActiveLayOut.Entities.AddItem(Winsert);
            Winsert.Invalidate();
            Winsert = null;
        }

        
        private void vdDest_vdDragOver(DragEventArgs drgevent, ref bool cancel)
        {
            cancel = true;
            if (Winsert == null) return;
            gPoint curpt = vdDest.ActiveDocument.CCS_CursorPos();
            //If the mouse is not moved then we do not refresh the graphics screen to avoid flicking
            if (Winsert.InsertionPoint.AreEqual(curpt, vdDest.ActiveDocument.ActiveActionRender.PixelSize / 2.0d)) return;
            //This command will refresh the graphics screen and call the vdDest_DrawOverAll event
            vdDest.ActiveDocument.ActiveLayOut.RefreshGraphicsControl(null);
        }

        private void listBox1_MouseDown(object sender, MouseEventArgs e)
        {
            //Create a new data object that contains an existing file and begin a Drag drop operation.
            DataObject data = new DataObject();
            System.Collections.Specialized.StringCollection filepaths = new System.Collections.Specialized.StringCollection();
            filepaths.Add(Application.StartupPath + "\\exemplo.dwg");
            data.SetFileDropList(filepaths);
            listBox1.DoDragDrop(data, DragDropEffects.Copy);
        }
    }
}

在版本7中，由于Render的更改，DrawOverAll不會像版本6那樣不斷觸發(fā)。在這種情況下，代碼應(yīng)更改為：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using VectorDraw.Actions;
using VectorDraw.Generics;
using VectorDraw.Geometry;
using VectorDraw.Professional;
using VectorDraw.Professional.vdPrimaries;
using VectorDraw.Professional.vdCollections;
using VectorDraw.Professional.vdObjects;
using VectorDraw.Professional.ActionUtility;
using VectorDraw.Professional.vdFigures;
using VectorDraw.Render;
using VectorDraw.Serialize;

namespace Example_Drag_7
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        vdInsert Winsert = null;

        private void Form1_Load(object sender, EventArgs e)
        {
            vdDest.vdDragDrop += new VectorDraw.Professional.Control.DragDropEventHandler(vectorDrawBaseControl1_vdDragDrop);
            vdDest.vdDragEnter += new VectorDraw.Professional.Control.DragEnterEventHandler(vectorDrawBaseControl1_vdDragEnter);
            vdDest.vdDragLeave += new VectorDraw.Professional.Control.DragLeaveEventHandler(vectorDrawBaseControl1_vdDragLeave);
            vdDest.vdDragOver += new VectorDraw.Professional.Control.DragOverEventHandler(vectorDrawBaseControl1_vdDragOver);
        }

        private void listBox1_MouseDown(object sender, MouseEventArgs e)
        {
            //Create a new data object that contains an existing file and begin a Drag drop operation.
            DataObject data = new DataObject();
            System.Collections.Specialized.StringCollection filepaths = new System.Collections.Specialized.StringCollection();
            filepaths.Add(Application.StartupPath + "\\exemplo.dwg");
            data.SetFileDropList(filepaths);
            listBox1.DoDragDrop(data, DragDropEffects.Copy);
        }

        private void vectorDrawBaseControl1_vdDragDrop(DragEventArgs drgevent, ref bool cancel)
        {
            cancel = true;
            if (Winsert == null) return;
            //Add the insert object in to Document ActiveLayout entities.
            vdDocument docAcess = vdDest.ActiveDocument;
            Winsert.Invalidate();
            Winsert.InsertionPoint = docAcess.CCS_CursorPos();
            Winsert.Update();
            docAcess.ActiveLayOut.Entities.AddItem(Winsert);
            Winsert.Invalidate();
            Winsert = null;
        }

        private void vectorDrawBaseControl1_vdDragEnter(DragEventArgs drgevent, ref bool cancel)
        {
            //A drag drop action is active and the cursor is just activate in the VectorDraw screen
            cancel = true;
            vdDocument docAccess = vdDest.ActiveDocument;
            //get the data object and check if is represents a drawing file.
            DataObject dataobject = drgevent.Data as DataObject;
            if (dataobject == null) return;
            System.Collections.Specialized.StringCollection strings = dataobject.GetFileDropList();
            if (strings == null || strings.Count != 1) return;
            string filename = strings[0];
            string blockname = System.IO.Path.GetFileNameWithoutExtension(filename);//get th block name of the file
            vdBlock block = docAccess.Blocks.FindName(blockname);//if the block already exist in the drawing then we do not redifine it.
            if (block == null)
            {
                Cursor curCursor = Cursor;
                Cursor = Cursors.WaitCursor;
                block = docAccess.Blocks.AddFromFile(filename, false);//add the block in the drawing
                Cursor = curCursor;
            }

            if (block == null) return;
            drgevent.Effect = DragDropEffects.Copy;

            //create an insert object but we do not add it in the Document ActiveLayout entities.
            Winsert = new vdInsert();
            Winsert.SetUnRegisterDocument(docAccess);
            Winsert.setDocumentDefaults();
            Winsert.Block = block;
            Winsert.CreateDefaultAttributes();
            Winsert.InsertionPoint = docAccess.CCS_CursorPos();
            Winsert.Update();
        }

        private void vectorDrawBaseControl1_vdDragLeave(EventArgs e, ref bool cancel)
        {  //Leaving the VectorDraw control 
            cancel = true;
            Winsert = null;
            vdDest.ActiveDocument.ActiveLayOut.Refresh();
        }

        private void vectorDrawBaseControl1_vdDragOver(DragEventArgs drgevent, ref bool cancel)
        {
            cancel = true;
            if (Winsert == null) return;
            vdDocument docAccess = vdDest.ActiveDocument;
            gPoint curpt = docAccess.CCS_CursorPos();
            curpt = docAccess.ActiveLayOut.User2WorldMatrix.Transform(curpt);
            Winsert.InsertionPoint = curpt;
            Winsert.Update();

            vdRender render = docAccess.ActiveActionRender;
            // Draw the insert in the mouse position
            bool isstarted = render.Started;
            if (!isstarted) render.StartDraw(true);
            if (render.Started)
            {
                Winsert.Draw(render);
                if (!isstarted) render.EndDraw();
            }
        }
    }
}

二. 搜索Document以查找具有某個Block的插入

問：如何用一種方法來搜索整個Document以獲得具有特定Block的插入？

答：可以嘗試以下代碼：

vdFramedControl.BaseControl.ActiveDocument.Prompt("Block name to search:");
string blockname = vdFramedControl.BaseControl.ActiveDocument.ActionUtility.getUserString();
vdFramedControl.BaseControl.ActiveDocument.Prompt(null);
if (blockname == null) return;
vdBlock blk = vdFramedControl.BaseControl.ActiveDocument.Blocks.FindName(blockname);
if (blk == null) return;

//search all vdPrimaries that are document register with handle != 0
vdSelection set = new vdSelection();//create a selection to hold the items
vdPrimariesList list = vdFramedControl.BaseControl.ActiveDocument.GetPrimaries(true);
foreach (vdPrimary var in list)
{
vdInsert test = var as vdInsert;
if (test == null) continue;
if (!object.ReferenceEquals(test.Block, blk)) continue;
set.AddItem(test, false, vdSelection.AddItemCheck.Nochecking);
}

三. 在打印機上打印多個頁面

問：想在一個打印作業(yè)中打印圖形的布局（每頁一個布局）。該怎么做？

答：這適用于版本6011及之后。可以嘗試以下代碼：

        public void Print_Clicked()
        {
            //because UpdatePropertiesFromPrinter was changed and you can not change the System.Drawing.Printing.PrintDocument object of a vdPrinter
            //the following logic must be used.
 
            //Create a New printer object and set it as DocumentUnregister
            vdPrint printer = new vdPrint();//new change
            printer.SetUnRegisterDocument(vdPro.ActiveDocument);//new change
 
            //Get the System.Drawing.Printing.PrintDocument from previous created vdPrinter object.
            //System.Drawing.Printing.PrintDocument printDoc = new System.Drawing.Printing.PrintDocument();//new change
            System.Drawing.Printing.PrintDocument printDoc = printer.UpdatePrinterFromProperties();//new change
            System.Drawing.Printing.PrintEventArgs printArgs = new System.Drawing.Printing.PrintEventArgs();
 
            printDoc.DocumentName = "TestPrint.pdf";
            printDoc.PrinterSettings.PrinterName = "CutePDF Writer";//@\\myServer\HP Deskjet 9800 Series; //  "Adobe PDF"; // Enter Custom PrinterName here..
 
            //Update the printer properties
            printer.UpdatePropertiesFromPrinter(printDoc);//new change
 
            //Start multipage printing
            printDoc.PrintController.OnStartPrint(printDoc, printArgs);
           
 
            // Actually print each page to the printer
            foreach (vdLayout layout in vdPro.ActiveDocument.LayOuts)
            {
                printer.SetLayout(layout);//new change
                printer.CenterDrawingToPaper();//new change
                printer.PrintOutPage();//new change
                //layout.Printer.UpdatePropertiesFromPrinter(printDoc);
                //layout.Printer.CenterDrawingToPaper();
                //layout.Printer.PrintOutPage();
            }
            // now print them Phsyically                                    
            printDoc.PrintController.OnEndPrint(printDoc, printArgs);
        }

請嘗試上面的代碼，并檢查此代碼中的備注。

四. 在將vdtext的高度和寬度添加到文檔之前獲取它的高度和寬度

問：如何在將vdtext的高度和寬度添加到文檔之前獲取它，就像版本的5 GetTextSize函數(shù)一樣？

答：可以試試以下代碼：

Private Function GetTextSize(ByVal TextString As String, ByVal tstyle As VectorDraw.Professional.vdPrimaries.vdTextstyle, ByVal Height As Double, ByRef duHeight As Double, ByRef duWidth As Double) As Boolean

	duWidth = 0 : duHeight = 0

	'Add a check like : If tstyle is nothing/null or textstring is empty exit sub

	If tstyle Is Nothing Then Return False

	If TextString Is Nothing Or TextString = "" Then Return False

	Dim text As VectorDraw.Professional.vdFigures.vdText = New VectorDraw.Professional.vdFigures.vdText()

	text.SetUnRegisterDocument(VectorDrawBaseControl1.ActiveDocument)

	text.setDocumentDefaults()

	text.Style = tstyle

	text.TextString = TextString

	text.Height = Height

	text.Update()

	duWidth = text.BoundingBox.Width

	duHeight = text.BoundingBox.Height

	Return True

End Function

未完待續(xù)......