Visual Graph Getting Started - Dynamically Create Graph

Each graph has the corresponding description string, so we can use SaveToBuffer() to save a graph to memory by string, also can use LoadFromBuffer() to generate a graph by string.

1. Create a new file in Visual Graph IDE, and then click Table -> New table... menu item to create a table with 2 columns and 3 rows. Now, please fill this table as below:

circle	<circle name="circle1" bounds="0,0,84,50" origin="42,25" pattern="1"/>
line	<line name="line1" origin="52,25" pattern="1" points="0,24,6 48,0,2 104,50,2"/>
Traffic Lights	<TrafficLights name="s" bounds="0,0,60,200" origin="30,100"> <circle name="Circle1" bounds="0,0,60,60" origin="30,35" backcolor="$FF" pattern="1"/> <circle name="Circle2" bounds="0,70,60,130" origin="30,105" pattern="1"/> <circle name="Circle3" bounds="0,140,60,200" origin="30,175" pattern="1"/> </TrafficLights>

2. Click Program -> Command line... menu item, input the following script in the Command line window and press <Enter>:

d=AddUnit( 0, "circle" );d.loadfrombuffer(text2.text)

Please note that text2 is the 2nd cell in first row.

Now, a circle will appear in current sheet according to text2.text like this:

Dynamically Create Graph 1

3. Input the following script in the Command line window and press <Enter>:

d=AddUnit( 0, "line" );d.loadfrombuffer(text4.text)

Please note that text4 is the 2nd cell in second row.

Now, a graph will appear in current sheet according to text4.text like this:

Dynamically Create Graph 2

4. Input the following script in the Command line window and press <Enter>:

d = AddUnit( 0, "traffic lights" ); d.LoadFromBuffer( text6.text )

Please note that text6 is the 2nd cell in third row.

Now, the traffic lights will appear in current sheet according to text6.text like this:

Dynamically Create Graph 3

5. Refer to this example, we can save graph's description string in file or database, once we need one, just simply call LoadFromBuffer() to generate it by using its description string.