Free transform the image

Question

Hi Forum!,
Im new to scripting. Thanks to forum for sharing the knowledge to entire world..
I have a small request to do with the scripting.
I have grouped all the pageItems.... as G.
and then selected the Group (G),
i have choosen the free transform tool using the command;
app.menuActions.itemByID(45569).invoke(); //to choose free transform tool.
all that i need to do is.. to enlarge the height of group (G) proportionally between top margin and bottom margin.
(which we do it manually by selecting the grouped item holding Shift+Alt key, and dragging untill we reach the desire size).
g = app.activeDocument.allPageItems;
gr = app.activeDocument.groups.add(g);
app.menuActions.itemByID(45569).invoke();
//then i need to increase the height of the group g between top margin and bottom margin.
Can anybody help on this free transformation of the selected group.
please..
Dhinak...

Answer 1

try sthg like:
var g = app.activeDocument.allPageItems;
var gr = app.activeDocument.groups.add(g);
var bgr = gr.geometricBounds;
var hgr = bgr[2]-bgr[0];
var pm= gr.parentPage.marginPreferences;
with(pm)
var t = top;
var b = bottom;
gr.move([bgr[1],t]);
var hn = gr.parentPage.bounds[2] - gr.parentPage.bounds[0] - t - b;
var s = hn / hgr ;
tM = app.transformationMatrices.add({horizontalScaleFactor:s,   verticalScaleFactor:s}); 
           gr .transform(CoordinateSpaces.INNER_COORDINATES,   AnchorPoint.TOP_CENTER_ANCHOR, tM );