CAD interactive draw straight lines (com Interface)

The user can draw a straight line at an arbitrary position controls viewport.

The main use of Function:

_DMxDrawX::DrawLine

Draw a straight line. Details are as follows:

parameter	Explanation
DOUBLE dX1	X-coordinate of the starting point of the line
DOUBLE dY1	Y coordinate of the start point of the line
DOUBLE dX2	X coordinate of the end point of the line
DOUBLE dY2	Y coordinate of the end point of the line

IMxDrawCustomEntity::Draw

On the entity mapped to FIG. When generally used for dynamic drag, drag and drop at the end, to the drawing in FIG.

_DMxDrawXEvents::DynWorldDraw

Dynamic Draw event drag and drop. Details are as follows:

parameter	Explanation
DOUBLE dX	X coordinate of the current mouse position
DOUBLE dY	Y coordinates of the current mouse position
IDispatch* pWorldDraw	IMxDrawWorldDraw objects for dynamically rendering
IDispatch* pData	IMxDrawCustomEntity objects, dynamic rendering data

_DMxDrawX::DrawText

Draw a single line of text. Details are as follows:

parameter	Explanation
DOUBLE dPosX	X coordinate of the position of the text
DOUBLE dPosY	Y coordinate position of the character
BSTR pszText	Text string
Double dHeight	Text height
DOUBLE dRotation	The angle of rotation of text
SHORT horizontalMode	Text horizontal alignment, 0 = kTextLeft, 1 = kTextCenter, 2 = kTextRight
SHORT verticalMode	Vertical alignment of the text, 1 = kTextBottom, 2 = kTextVertMid, 3 = kTextTop

c # Code Description implemented:

Dynamic drag and drop drawing event:

private void DynamicDrawLine()
{
    //点取第一点
    MxDrawUiPrPoint getPt = new MxDrawUiPrPoint();
    getPt.message = "点取第一点:";
    if (getPt.go() != MCAD_McUiPrStatus.mcOk)
        return;
    //点取第二点
    MxDrawUiPrPoint getSecondtPt = new MxDrawUiPrPoint();
    getSecondtPt.message = "点取第二点:";

    MxDrawCustomEntity spDrawData = getSecondtPt.InitUserDraw("DrawMyLine");
    //设置point类型的属性。
    spDrawData.SetPoint("startpoint", getPt.value());
    //设置线宽
    spDrawData.SetDouble("linewidth", 5);

    if (getSecondtPt.go() != MCAD_McUiPrStatus.mcOk)
        return;

    spDrawData.Draw();
}

Dynamic draw a line:

private void axMxDrawX1_DynWorldDraw(object sender, AxMxDrawXLib._DMxDrawXEvents_DynWorldDrawEvent e)
{
    MxDrawCustomEntity pCustomEntity = (MxDrawCustomEntity)e.pData;
    MxDrawWorldDraw pWorldDraw = (MxDrawWorldDraw)e.pWorldDraw;
    string sGuid = pCustomEntity.Guid;

    MxDrawPoint curPoint = new MxDrawPoint();

    curPoint.x = e.dX;
    curPoint.y = e.dY;
    if (sGuid == "DrawMyLine")
    {
        MxDrawPoint sPt = pCustomEntity.GetPoint("startpoint");
        double dw = pCustomEntity.GetDouble("linewidth");
        pWorldDraw.LineWidth = dw;
        pWorldDraw.DrawLine(sPt.x, sPt.y, curPoint.x, curPoint.y);
    }
}

Show results:

Draw straight lines by clicking on the button, trigger DrawLine () event, the user can take the start line in any position CAD controls the viewport points, and then take the end point draw a straight line. As shown below: