梦想CAD控件自定义实体实现
一、增加自定义实体对象调用DrawCustomEntity函数，绘制一个自定义实体对象。
下面代码绘制一个自定义实体，C#代码实现如下：
private void DrawMlineCommand()
{
MxDrawUiPrPoint getPt = new MxDrawUiPrPoint();
getPt.message = "点取第一点";
if (getPt.go() != MCAD_McUiPrStatus.mcOk)
{
return;
}
var frstPt = getPt.value();
if (frstPt == null)
{
return;
}
MxDrawUiPrPoint getSecondPt = new MxDrawUiPrPoint();
getSecondPt.message = "点取第二点";
getSecondPt.basePoint = frstPt;
getSecondPt.setUseBasePt(false);
MxDrawCustomEntity spDrawData = getSecondPt.InitUserDraw("DrawCustEntity");
spDrawData.SetDouble("Width", 30);
spDrawData.SetPoint("Point1", frstPt);
Int32 lCount = 1;
spDrawData.SetLong("Count", 1);
while (true)
{
if (getSecondPt.go() != MCAD_McUiPrStatus.mcOk)
break;
var secondPt = getSecondPt.value();
if (secondPt == null)
break;
lCount++;
String sPointName = "Point" + lCount.ToString();
spDrawData.SetPoint(sPointName, secondPt);
spDrawData.SetLong("Count", lCount);
}
if (lCount > 1)
axMxDrawX1.DrawEntity(spDrawData);
}
js代码实现如下：
//绘制自定义实体
function DyInsertCustomEntity() {
//清空当前显示内容
mxOcx.NewFile();
var getPt = mxOcx.NewComObject("IMxDrawUiPrPoint");
getPt.message = "点取第一点";
if (getPt.go() != 1)
return;
var frstPt = getPt.value();
if (frstPt == null)
return;
var getSecondPt = mxOcx.NewComObject("IMxDrawUiPrPoint");
getSecondPt.message = "点取第二点";
getSecondPt.basePoint = frstPt;
getSecondPt.setUseBasePt(true);
if (getSecondPt.go() != 1)
return;
var secondPt = getSecondPt.value();
if (secondPt == null)
return;
var ent = mxOcx.DrawCustomEntity("TestMxCustomEntity", "");
ent.SetPoint("spt", frstPt);
ent.SetPoint("ept", secondPt);
}
//绘制自定义实体1
function MyInsertCustomEntity()
{ //清空当前显示内容
mxOcx.NewFile();
var spDrawData;
var getPt1 = mxOcx.NewComObject("IMxDrawUiPrPoint");
{
getPt1.message = "点取第一点";
spDrawData = getPt1.InitUserDraw("DynDrawEnt1");
if (getPt1.go() != 1) {
return;
}
}
var getPt2 = mxOcx.NewComObject("IMxDrawUiPrPoint");
{
getPt2.message = "点取第二点";
spDrawData = getPt2.InitUserDraw("DynDrawEnt2");
spDrawData.SetPoint("vFirst", getPt1.value());
if (getPt2.go() != 1) {
return;
}
}
var getPt3 = mxOcx.NewComObject("IMxDrawUiPrPoint");
{
getPt3.message = "点取第三点";
spDrawData = getPt3.InitUserDraw("DynDrawEnt3");
spDrawData.SetPoint("vFirst", getPt1.value());
spDrawData.SetPoint("vSecond", getPt2.value());
if (getPt3.go() != 1) {
return;
}
}
var getPt4 = mxOcx.NewComObject("IMxDrawUiPrPoint");
{
getPt4.message = "点取第四点";
spDrawData = getPt4.InitUserDraw("DynDrawEnt4");
spDrawData.SetPoint("vFirst", getPt1.value());
spDrawData.SetPoint("vSecond", getPt2.value());
spDrawData.SetPoint("vThird", getPt3.value());
if (getPt4.go() != 1) {
return;
}
}
{
spDrawData = mxOcx.DrawCustomEntity("DrawEnt", "");
spDrawData.SetPoint("vFirst", getPt1.value());
spDrawData.SetPoint("vSecond", getPt2.value());
spDrawData.SetPoint("vThird", getPt3.value());
spDrawData.SetPoint("vFour", getPt4.value());
}
}
二、响应自定义事件，绘制自定义实体
需要响应DMxDrawXEvents::CustomEntity_Explode事件。
下面例子，得到自实体的数据，C#代码实现如下：
private void axMxDrawX1_CustomEntity_Explode(object sender, AxMxDrawXLib._DMxDrawXEvents_CustomEntity_ExplodeEvent e)
{
MxDrawCustomEntity pCustomEntity = (MxDrawCustomEntity)e.pCustomEntity;
var sGuid = pCustomEntity.Guid;
MxDrawWorldDraw pWorldDraw = (MxDrawWorldDraw)e.pDraw;
if (sGuid == "DrawCustEntity")
{
MyDrawMline(pWorldDraw, pCustomEntity, null);
e.pRet = 1;
}
}
private void MyDrawMline(MxDrawWorldDraw pWorldDraw, MxDrawCustomEntity pCustomEntity, MxDrawPoint curPt)
{
// 取自定义实体的端点数目，属性。
if (!pCustomEntity.IsHave("Count"))
return;
long lCount = pCustomEntity.GetLong("Count");
MxDrawPolyline tmpPl = new MxDrawPolyline();
for (long i = 0; i < lCount; i++)
{
String sName;
sName = "Point" + (i + 1).ToString();
if (!pCustomEntity.IsHave(sName))
break;
// 取自定义实体的端点坐标。
MxDrawPoint pt = pCustomEntity.GetPoint(sName);
// 把端点坐标，传给pl线，用于生成双线。
tmpPl.AddVertexAt(pt);
}
if (curPt != null)
tmpPl.AddVertexAt(curPt);
if (tmpPl.NumVerts < 2)
{
// 端点数少于2就，不构成直线，就不需要显示。
return;
}
// 求pl线，开始点的导数.
MxDrawVector3d vecFx;
if (!tmpPl.GetFirstDeriv(tmpPl.GetStartParam(), out vecFx))
return;
if (vecFx.IsZeroLength())
return;
// 把向量旋转90度.
vecFx.RotateByXyPlan(3.14159265 / 2.0);
vecFx.Normalize();
//得到双线的宽度属性。
double dWidth = pCustomEntity.GetDouble("Width");
vecFx.Mult(dWidth);
MxDrawPoint startPt = tmpPl.GetStartPoint();
// 向pl线，两个方向偏移，
MxDrawPoint offsetPt1 = new MxDrawPoint();
offsetPt1.x = startPt.x;
offsetPt1.y = startPt.y;
offsetPt1.Add(vecFx);
MxDrawPoint offsetPt2 = new MxDrawPoint();
offsetPt2.x = startPt.x;
offsetPt2.y = startPt.y;
offsetPt2.Sum(vecFx);
MxDrawText text = new MxDrawText();
text.TextString = "Test";
text.Height = 100;
text.Position = startPt;
text.AlignmentPoint = startPt;
MxDrawPoint pt1, pt2;
text.GetBoundingBox(out pt1, out pt2);
MxDrawPoint pt3 = new MxDrawPoint();
pt3.x = pt1.x;
pt3.y = pt2.y;
MxDrawPoint pt4 = new MxDrawPoint();
pt4.x = pt2.x;
pt4.y = pt1.y;
MxDrawPoints pts = new MxDrawPoints();
pts.Add(pt1.x, pt1.y, 0);
pts.Add(pt3.x, pt3.y, 0);
pts.Add(pt2.x, pt2.y, 0);
pts.Add(pt4.x, pt4.y, 0);
Int32 lDraworder = pWorldDraw.Draworder;
pWorldDraw.Draworder = lDraworder + 1;
pWorldDraw.DrawWipeout(pts);
pWorldDraw.Draworder = lDraworder + 2;
pWorldDraw.DrawEntity((MxDrawEntity)text);
pWorldDraw.Draworder = lDraworder;
// pWorldDraw->
{
MxDrawResbuf newobj;
if (tmpPl.OffsetCurves(dWidth, offsetPt1, out newobj))
{
for (Int32 j = 0; j < newobj.Count; j++)
{
MxDrawEntity tmpObj = (MxDrawEntity)newobj.AtObject(j);
if (tmpObj == null)
continue;
pWorldDraw.DrawEntity(tmpObj);
}
newobj.RemoveAll();
}
}
{
MxDrawResbuf newobj;
if (tmpPl.OffsetCurves(dWidth, offsetPt2, out newobj))
{
for (Int32 j = 0; j < newobj.Count; j++)
{
MxDrawEntity tmpObj = (MxDrawEntity)newobj.AtObject(j);
if (tmpObj == null)
continue;
pWorldDraw.DrawEntity(tmpObj);
}
// 这不使用newobj，需要显示调用RemoveAll函数清楚内存。
// 不然这个可能就会程序退出时才释放，这时它会去释放控件对象指针，有可能会出错。
newobj.RemoveAll();
}
}
}
js代码实现如下：
// 自定义实体绘制函数
function ExplodeFun(pCustomEntity, pWorldDraw, txt) {
var sGuid = pCustomEntity.Guid;
if (sGuid == "TestMxCustomEntity") {
if (!pCustomEntity.IsHave("ept"))
return;
var stp = pCustomEntity.GetPoint("spt");
if (stp == null)
return;
var ept = pCustomEntity.GetPoint("ept");
if (ept == null)
return;
var mxUtility = mxOcx.NewUtility();
var vec = ept.SumVector(stp);
vec.Mult(0.5);
var midPt = mxOcx.NewPoint();
midPt.x = stp.x;
midPt.y = stp.y;
midPt.Add(vec);
var dAng = vec.Angle();
//计算一个标注角度，使用文字对象始终头朝上
dAng = mxUtility.GetDimAngle(dAng);
var dDis = 0.0;
dDis = stp.DistanceTo(ept);
var sTxt = "L=" + formatNumber(dDis, '#.##');
dAng = dAng * 180.0 / 3.14159265;
vec.RotateByXyPlan(3.14159265 / 2.0);
vec.Normalize();
vec.Mult(10);
stp.Add(vec);
ept.Add(vec);
pWorldDraw.DrawLine(stp.x, stp.y, ept.x, ept.y);
vec.Mult(2);
stp.Sum(vec);
ept.Sum(vec);
pWorldDraw.DrawLine(stp.x, stp.y, ept.x, ept.y);
pWorldDraw.SetColorIndex(1);
pWorldDraw.DrawText(midPt.x, midPt.y, sTxt, 5, dAng,
1, 2);
mxOcx.SetEventRet(1);
}
var dHeigth = mxOcx.ViewLongToDocCoord(5);
// 绘制绘制自定义实体1
if(sGuid == "DrawEnt"){
{
if (!pCustomEntity.IsHave("vFour"))
return;
if (!pCustomEntity.IsHave("vThird"))
return;
if (!pCustomEntity.IsHave("vSecond"))
return;
if (!pCustomEntity.IsHave("vFirst"))
return;
}
{
var vFourPt = pCustomEntity.GetPoint("vFour");
var dX = vFourPt.x;
var dY = vFourPt.y;
var vThirdPt = pCustomEntity.GetPoint("vThird");
pWorldDraw.DrawLine(vThirdPt.x, vThirdPt.y, dX, dY);
pWorldDraw.DrawText(dX, dY, "(" + dX.toFixed(1) + "," + dY.toFixed(1) + ")", dHeigth, 0, 1, 1);
var dX = vThirdPt.x;
var dY = vThirdPt.y;
var vSecondPt = pCustomEntity.GetPoint("vSecond");
pWorldDraw.DrawLine(vSecondPt.x, vSecondPt.y, dX, dY);
pWorldDraw.DrawText(dX, dY, "(" + dX.toFixed(1) + "," + dY.toFixed(1) + ")", dHeigth, 0, 1, 1);
dX = vSecondPt.x;
dY = vSecondPt.y;
var vFirstPt = pCustomEntity.GetPoint("vFirst");
pWorldDraw.DrawLine(vFirstPt.x, vFirstPt.y, dX, dY);
pWorldDraw.DrawText(dX, dY, "(" + dX.toFixed(1) + "," + dY.toFixed(1) + ")", dHeigth, 0, 1, 1);
dX = vFirstPt.x;
dY = vFirstPt.y;
pWorldDraw.DrawText(dX, dY, "(" + dX.toFixed(1) + "," + dY.toFixed(1) + ")", dHeigth, 0, 1, 1);
}
mxOcx.SetEventRet(1);
}
}
三、响应自定义事件，动态绘制
C#代码实现如下：
private void axMxDrawX1_DynWorldDraw(object sender, AxMxDrawXLib._DMxDrawXEvents_DynWorldDrawEvent e)
{
MxDrawCustomEntity pCustomEntity = (MxDrawCustomEntity)e.pData;
String sGuid = pCustomEntity.Guid;
e.pRet = 0;
MxDrawWorldDraw pWorldDraw = (MxDrawWorldDraw)e.pWorldDraw;
MxDrawPoint curPt = new MxDrawPoint();
curPt.x = e.dX;
curPt.y = e.dY;
if (sGuid == "DrawCustEntity")
{
MyDrawMline(pWorldDraw, pCustomEntity, curPt);
}
}
js代码实现如下：
//动态施放绘制事件回调函数指针
//动态拖放时的绘制事件
//参数一为当前鼠标位置X坐标；参数为二当前鼠标位置Y坐标；
// 参数三为IMxDrawWorldDraw对象，用于动态绘制；参数四为IMxDrawCustomEntity对象，动态绘制数据
function DoDynWorldDrawFun(dX,dY,pWorldDraw,pData) {
//自定义实体的GUID标识符
var sGuid = pData.Guid;
//设置自定义事件的返回值
mxOcx.SetEventRet(0);
var curPt = mxOcx.NewPoint();
curPt.x = dX;
curPt.y = dY;
var dHeigth = mxOcx.ViewLongToDocCoord(5);
//自定义实体的GUID标识符
switch (pData.Guid) {
case "DynDrawEnt4":
{
var vThirdPt = pData.GetPoint("vThird");
pWorldDraw.DrawLine(vThirdPt.x, vThirdPt.y, dX, dY);
pWorldDraw.DrawText(dX, dY, "(" + dX.toFixed(1) + "," + dY.toFixed(1) + ")", dHeigth, 0, 1, 1);
dX = vThirdPt.x;
dY = vThirdPt.y;
}
case "DynDrawEnt3":
{
var vSecondPt = pData.GetPoint("vSecond");
pWorldDraw.DrawLine(vSecondPt.x, vSecondPt.y, dX, dY);
pWorldDraw.DrawText(dX, dY, "(" + dX.toFixed(1) + "," + dY.toFixed(1) + ")", dHeigth, 0, 1, 1);
dX = vSecondPt.x;
dY = vSecondPt.y;
}
case "DynDrawEnt2":
{
var vFirstPt = pData.GetPoint("vFirst");
pWorldDraw.DrawLine(vFirstPt.x, vFirstPt.y, dX, dY);
pWorldDraw.DrawText(dX, dY, "(" + dX.toFixed(1) + "," + dY.toFixed(1) + ")", dHeigth, 0, 1, 1);
dX = vFirstPt.x;
dY = vFirstPt.y;
}
case "DynDrawEnt1":
{
pWorldDraw.DrawText(dX, dY, "(" + dX.toFixed(1) + "," + dY.toFixed(1) + ")", dHeigth, 0, 1, 1);
}
}
//设置自定义事件的返回值
mxOcx.SetEventRet(0);
}
四、响应自定义事件，返回自定义实体夹点
需要响应_DMxDrawXEvents::CustomEntity_getGripPoints事件，C#代码实现如下：
private void axMxDrawX1_CustomEntity_getGripPoints(object sender, AxMxDrawXLib._DMxDrawXEvents_CustomEntity_getGripPointsEvent e)
{
MxDrawCustomEntity pCustomEntity = (MxDrawCustomEntity)e.pCustomEntity;
var sGuid = pCustomEntity.Guid;
e.pOk = 0;
if (sGuid == "DrawCustEntity")
{
if (!pCustomEntity.IsHave("Count"))
return;
long lCount = pCustomEntity.GetLong("Count");
MxDrawResbuf ret = (MxDrawResbuf)axMxDrawX1.NewResbuf();
for (long i = 0; i < lCount; i++)
{
String sName;
sName = "Point" + (i + 1).ToString();
if (!pCustomEntity.IsHave(sName))
break;
// 取自定义实体的端点坐标。
MxDrawPoint pt = pCustomEntity.GetPoint(sName);
ret.AddPoint(pt);
}
e.pOk = 1;
axMxDrawX1.SetEventRetEx(ret);
}
}
js代码实现如下：
// 返回自定义实体夹点
function GetGripPointsFun(pCustomEntity) {
var sGuid = pCustomEntity.Guid;
//自定义实体绘制两条直线
if (sGuid == "TestMxCustomEntity") {
if (!pCustomEntity.IsHave("ept"))
return;
var stp = pCustomEntity.GetPoint("spt");
if (stp == null)
return;
var ept = pCustomEntity.GetPoint("ept");
if (ept == null)
return;
var ret = mxOcx.NewResbuf();
ret.AddPoint(stp);
ret.AddPoint(ept);
mxOcx.SetEventRetEx(ret);
}
//自定义实体1
if (sGuid == "DrawEnt") {
if (!pCustomEntity.IsHave("vFour"))
return;
var stp = pCustomEntity.GetPoint("vFirst");
if (stp == null)
return;
var ept = pCustomEntity.GetPoint("vSecond");
if (ept == null)
return;
var tpt = pCustomEntity.GetPoint("vThird");
if (tpt == null)
return;
var fpt = pCustomEntity.GetPoint("vFour");
if (fpt == null)
return;
var ret = mxOcx.NewResbuf();
ret.AddPoint(stp);
ret.AddPoint(ept);
ret.AddPoint(tpt);
ret.AddPoint(fpt);
mxOcx.SetEventRetEx(ret);
}
}
五、响应自定义事件，夹点移动后的处理
需要响应CustomEntity_moveGripPointsAt事件。
下面例子，夹点移动后，修改自定义实体的属性，C#代码实现如下：
private void axMxDrawX1_CustomEntity_moveGripPointsAt(object sender, AxMxDrawXLib._DMxDrawXEvents_CustomEntity_moveGripPointsAtEvent e)
{
e.pRet = 1;
MxDrawCustomEntity pCustomEntity = (MxDrawCustomEntity)e.pCustomEntity;
var sGuid = pCustomEntity.Guid;
if (sGuid == "DrawCustEntity")
{
if (!pCustomEntity.IsHave("Count"))
return;
long lCount = pCustomEntity.GetLong("Count");
for (long i = 0; i < lCount; i++)
{
String sName;
sName = "Point" + (i + 1).ToString();
if (!pCustomEntity.IsHave(sName))
break;
// 取自定义实体的端点坐标。
MxDrawPoint pt = pCustomEntity.GetPoint(sName);
if (i == e.lGridIndex)
{
pt.x = pt.x + e.dOffsetX;
pt.y = pt.y + e.dOffsetY;
pCustomEntity.SetPoint(sName, pt);
}
}
}
}
js代码实现如下：
// 移动自定义实体夹点
function MoveGripPointsFun(pCustomEntity, lGridIndex, dOffsetX, dOffsetY) {
var sGuid = pCustomEntity.Guid;
if (sGuid == "TestMxCustomEntity") {
if (!pCustomEntity.IsHave("ept"))
return;
var stp = pCustomEntity.GetPoint("spt");
if (stp == null)
return;
var ept = pCustomEntity.GetPoint("ept");
if (ept == null)
return;
if (lGridIndex == 0) {
stp.x = stp.x + dOffsetX;
stp.y = stp.y + dOffsetY;
pCustomEntity.SetPoint("spt", stp);
}
else {
ept.x = ept.x + dOffsetX;
ept.y = ept.y + dOffsetY;
pCustomEntity.SetPoint("ept", ept);
}
mxOcx.SetEventRet(1);
}
if (sGuid == "DrawEnt") {
if (!pCustomEntity.IsHave("vFour"))
return;
var stp = pCustomEntity.GetPoint("vFirst");
if (stp == null)
return;
var ept = pCustomEntity.GetPoint("vSecond");
if (ept == null)
return;
var tpt = pCustomEntity.GetPoint("vThird");
if (tpt == null)
return;
var fpt = pCustomEntity.GetPoint("vFour");
if (fpt == null)
return;
{
stp.x = stp.x + dOffsetX;
stp.y = stp.y + dOffsetY;
pCustomEntity.SetPoint("vFirst", stp);
ept.x = ept.x + dOffsetX;
ept.y = ept.y + dOffsetY;
pCustomEntity.SetPoint("vSecond", ept);
tpt.x = tpt.x + dOffsetX;
tpt.y = tpt.y + dOffsetY;
pCustomEntity.SetPoint("vThird", tpt);
fpt.x = fpt.x + dOffsetX;
fpt.y = fpt.y + dOffsetY;
pCustomEntity.SetPoint("vFour", fpt);
}
mxOcx.SetEventRet(1);
}
}
六、自定义实体之打碎
c#代码实现如下
// 打开图纸文件。
axMxDrawX1.OpenDwgFile("C:\西桥头村.dwg");
// 打碎图纸上的自定义实体。
MxDrawResbuf filter = new MxDrawResbuf();
// 设置选择过滤条件，只选择自定义实体。
filter.AddStringEx("ACAD_PROXY_ENTITY", 5020);
MxDrawSelectionSet ss = new MxDrawSelectionSet();
// 得到所有自定义实体。
ss.AllSelect(filter);
// 遍历自定义实体
for (Int32 i = 0; i < ss.Count; i++)
{
MxDrawEntity ent = ss.Item(i);
MxDrawResbuf param = new MxDrawResbuf();
param.AddObjectId(ent.ObjectID);
// 打碎自定义实体。
MxDrawResbuf ret = (MxDrawResbuf)axMxDrawX1.CallEx("Mx_Explode", param);
// 删除自定义实体。
if(ret.AtString(0) == "Ok")
ent.Erase();
}
// 把图纸所有内容都放到当前视区。
axMxDrawX1.ZoomAll();
七、在块表记录中添加一个自定义实体
c#代码实现如下
MxDrawDatabase database = (MxDrawDatabase)axMxDrawX1.GetDatabase();
MxDrawBlockTableRecord blkRec = database.CurrentSpace();
// 调用AddCustomEntity函数绘制自定义实体。 逗号后的字符串"DrawCustEntity"是自定义实体的GUID
MxDrawResbuf ret =blkRec.GetProp("AddCustomEntity,DrawCustEntity");
// 得到自定义实体。
MxDrawCustomEntity ent = (MxDrawCustomEntity)database.ObjectIdToObject(ret.AtObjectId(0));
// 设置自定义实体的属性。
ent.BeginSetValue();
ent.SetDouble("Width", 30);
MxDrawPoint pt1 = new MxDrawPoint();
pt1.x = 10;
pt1.y = 10;
MxDrawPoint pt2 = new MxDrawPoint();
pt2.x = 20;
pt2.y = 20;
ent.SetPoint("Point1", pt1);
ent.SetPoint("Point2", pt2);
ent.SetLong("Count", 2);
ent.EntSetValue();
厉害，学习了自定义实体 楼主应该多介绍下 这个软件啊
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