initial=string

the name of the initial layout

neutral_color=color

a color specification (see ColorTools/Format) for the unselected vertices in the graph. LightGray by default.

select_color=color

a color specification (see ColorTools/Format) for the selected vertex in the graph. Red by default.

drag_color=color

a color specification (see ColorTools/Format) for the active vertex while dragging in the graph. Yellow by default.

nodrag=truefalse

if the nodrag option is given, only click repositioning will be active in the interactive plot

noselect=truefalse

if the noselect option is given, only drag repositioning will be active in the interactive plot

The interactive layout method creates an interactive plot component with a drawing of the Graph that can have the vertices repositioned by click, or clicking and dragging.

The first method is to click on a vertex. The vertex will then change to the selection color (red by default). Then click in a new location to reposition the selected vertex, when it will return to the neutral color.

The second method is to click and drag a vertex into a new position. When first clicked, the vertex will change to the dragging color (yellow by default). The vertex will return the neutral color when dragging ends.

For the interactive layout, all of the graph stylesheet will be preserved except for vertex colors. All vertices will be shown in a neutral color (light gray by default).  This change is not permanent, and is only in effect for the interactive plot.

The user layout of the input graph will be continuously updated to reflect changes in the interactive plot so that a bare call to DrawGraph will draw the graph using this layout.

This layout method works in two dimensions only.

$\mathrm{with}\left(\mathrm{GraphTheory}\right)\:$

$\mathrm{with}\left(\mathrm{RandomGraphs}\right)\:$

$\mathrm{G1}≔\mathrm{RandomGraph}\left(15\,26\right)$

$\mathrm{G1}≔\mathrm{Graph\; 1:\; an\; undirected\; graph\; with\; 15\; vertices\; and\; 26\; edge(s)}$

$\mathrm{DrawGraph}\left(\mathrm{G1}\,\mathrm{layout}=\mathrm{interactive}\right)$

$\mathrm{DrawGraph}\left(\mathrm{G1}\right)$

$\mathrm{DrawGraph}\left(\mathrm{G1}\,\mathrm{layout}=\mathrm{interactive}\,\mathrm{layoutoptions}=\left[\mathrm{initial}=\mathrm{default}\right]\right)$

$\mathrm{G2}≔\mathrm{RandomGraph}\left(14\,29\right)$

$\mathrm{G2}≔\mathrm{Graph\; 2:\; an\; undirected\; graph\; with\; 14\; vertices\; and\; 29\; edge(s)}$

$\mathrm{DrawGraph}\left(\mathrm{G2}\,\mathrm{layout}=\mathrm{interactive}\,\mathrm{layoutoptions}=\left[\mathrm{neutral\_color}=''White''\,\mathrm{initial}=\mathrm{spring}\right]\right)$

$\mathrm{DrawGraph}\left(\mathrm{G2}\right)$