Add Graph Object
Version Info
Minimum Origin Version Required: Origin 8 SR0
Remark
We can create Graph Object like line, text, retangle on graph, worksheet or matrix window. More details about GraphObject class please reference to GraphObject and GraphLayer and PolyPolylineGraphObject
Add Text
void AddText()
{
GraphPage gp;
gp.Create("Origin");
GraphLayer gl = gp.Layers(0); // get the first layer
if(gl)
{
// add a Text named MyText
GraphObject go = gl.CreateGraphObject(GROT_TEXT);
go.SetName("MyText");
if( go )
{
go.Text = "New Label";
}
gl.GetPage().Refresh();
}
}
Add Line
Keep a graph window ative and run below AddLine function to add one vertical line and one horizontal line.
void AddLine()
{
GraphLayer gl = Project.ActiveLayer();
if( gl )
{
// add vertical line and set position
GraphObject goVLine = gl.CreateGraphObject(GROT_LINE);
goVLine.SetName("vline");
goVLine.X = gl.X.From + (gl.X.To - gl.X.From) / 2; // set the init position of vertical line
// set direction, script
string strScript = "type -a " + " \"X = $(vline.X)\" "; // set this script, moving vertical line will print out X pos to Command window.
SetLineFormat(goVLine, LN_VERTICAL, strScript, GRCT_MOVE);
// add horizontal line and set position
GraphObject goHLine = gl.CreateGraphObject(GROT_LINE);
goHLine.SetName("hline");
goHLine.Y = gl.Y.From + (gl.Y.To - gl.Y.From) / 2; // set the init position of horizontal line
// set direction, script
strScript = "type -a " + " \"Y = $(hline.Y)\" "; // set this script, moving horizontal line will print out Y pos to Command window.
SetLineFormat(goHLine, LN_HORIZONTAL, strScript, GRCT_MOVE);
}
}
// set line object properties, script, format, color, width, attach mode, direction...
void SetLineFormat(GraphObject& goLine, int nDirection, string strScript, int nExecMode)
{
goLine.Attach = 2;// 2, layer and scale
Tree tr;
tr.Root.Span.nVal = 1; // 1 to span over the whole layer
tr.Root.Direction.nVal = nDirection; // vertical or horizontal
tr.Root.Color.nVal = SYSCOLOR_RED;
tr.Root.Width.dVal = 3;
tr.Root.Event.nVal = nExecMode;
tr.Root.Script.strVal = strScript; // set script, run it after the Event specified by nExecMode
if( 0 == goLine.UpdateThemeIDs(tr.Root) ) // 0 means no error
{
bool bRet = goLine.ApplyFormat(tr, true, true); // return true if applied format successfully
}
}
Add Rectangle
void AddRectangle()
{
GraphPage gp;
gp.Create("Origin");
GraphLayer gl = gp.Layers(0);
GraphObject goRect = gl.CreateGraphObject(GROT_RECT);
}
Add Curved Arrow Tool
This example shows how to add a curved arrow line on graph window, and how to change vertices of curve arrow line. In the following function, if replace GROBJ_TN_LINE4 to GROT_POLYLINE, the graph object will be Polyline.
#include <..\Originlab\grobj_utils.h>
void graph_object_line4_ex()
{
GraphPage gp;
gp.Create("origin");
GraphLayer gl = gp.Layers();
GraphObject go;
go = gl.CreateGraphObject(GROBJ_TN_LINE4);
go.Attach = ATTACH_TO_SCALE;
Tree tr;
tr = go.GetFormat(FPB_DATA, FOB_ALL, true, true);
// to take a look on default position
vector vx0, vy0;
vx0 = tr.Root.Data.X.dVals;
vy0 = tr.Root.Data.Y.dVals;
// to set the proper position for four points
vector vx = {2.2, 4.7, 6.58, 7.16};
vector vy ={5.7, 4.22, 5.12, 7.35};
tr.Root.Data.X.dVals = vx;
tr.Root.Data.Y.dVals = vy;
tr.Root.Arrow.End.Style.nVal = 1; // add arrow to the end
int nErr = go.UpdateThemeIDs(tr.Root);
if(nErr == 0)
{
go.ApplyFormat(tr, true, true);
}
else
{
out_int("err = ", nErr);
}
}
Add Polygon Tool
#include <..\Originlab\grobj_utils.h>
void graph_object_create_polygon_ex()
{
GraphPage gp;
gp.Create("origin");
GraphLayer gl = gp.Layers();
GraphObject go;
go = gl.CreateGraphObject(GROT_POLYGON); // create polygon by type id
go.Attach = ATTACH_TO_SCALE;
Tree tr;
tr = go.GetFormat(FPB_DATA, FOB_ALL, true, true);// FPB_DATA bit to control the accessing of vertices of graph object
// When polygon is just created, there are no vertices, so need to set them
// The size of vx and vy vectors below will determine the number of points of the graph object
Tree trNew;
vector vx = {2.4, 4.6, 7.3, 6.8};
vector vy ={4.8, 7.9, 7.2, 1.6};
trNew.Root.Data.X.dVals = vx;
trNew.Root.Data.Y.dVals = vy;
int nErr = go.UpdateThemeIDs(trNew.Root);
if(nErr == 0)
{
go.ApplyFormat(trNew, true, true);
}
else
{
out_int("err = ", nErr);
}
}
Add Polypolygon
static void make_circle(vector& vx, vector& vy, int nSize, double x0, double y0, double rr)
{
vx.SetSize(nSize);
vy.SetSize(nSize);
double inc = 2.* pi/nSize;
double ang=0;
for(int ii = 0; ii <nSize; ii++, ang+= inc)
{
vx[ii] = x0 + rr* sin(ang);
vy[ii] = y0 + rr* cos(ang);
}
}
void many_circles(int nRegNum = 100)
{
GraphLayer gl = Project.ActiveLayer();
double x1, x2, y1, y2, x0, y0, rr;
x1 = gl.X.From, x2 = gl.X.To;
y1 = gl.Y.From, y2 = gl.Y.To;
PolyPolylineGraphObject go;
go = gl.CreateGraphObject(GROT_POLYPOLYGON, "PP");
go.Attach = ATTACH_TO_SCALE;
// Set Label for polypolygon
go.SetDrawOption(POLYPOLYLINE_DRAW_OPTION_NEED_TEXT);
vector<double> vx, vy;
for(int ii = 0; ii < nRegNum ; ii ++)
{
x0 = x1 + (x2-x1) * rnd();
y0 = y1 + (y2-y1) *rnd();
rr = (x2-x1)/50 + rnd() * (x2-x1)/100;
make_circle(vx, vy, 40, x0, y0, rr);
go.AddPolyline(vx, vy);
}
Tree tr;
tr.Root.Fill.Color.nVal = INDEX_COLOR_TRANSPARENT;
tr.Root.Border.Color.nVal = SYSCOLOR_YELLOW;
tr.Root.Border.Width.dVal = 0.2;
tr.Root.States.nVal = GOC_NO_SELECT;
int nRet = go.UpdateThemeIDs(tr.Root);
go.ApplyFormat(tr, true, true);
gl.GetPage().Refresh();
out_str("done");
}
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