70002651 A method to get the grip indexes from a point

Summary

A method to get the grip indexes from a point on the webcontrol

Solution

In version 11.4.1 a new method vdcanvas.GripManager.GetGripIndexesFromPoint was exported

Returns an array contains the entities with their grip indices that exists over the passed point
param name="x" : X position in pixel
param name="y" : Y position in pixel
Returns: An array contains the entities with their grip indices that exists over the passed point.
Each item of the array is an array of two items [fig,indexes], fig is the entity and indexes is a zero based array of grip indicies of the entity under the passed x,y position.
If no grips are under the passed position returns an empty (zero length) array

Example:

//overwrite the vdmousedown event
//so when no user action is started and the user click over an entity we change its color to red
//except when user click over a grip we do nothing and let the default web control implemantation to begin a movegrip action

var vdcanvas;
function vdrawInitPageLoad() {
  vdcanvas = vdmanager.AttachCanvas('canvas');
  vdcanvas.GripManager.GripColor = [255, 255, 0, 255];
  vdcanvas.GripManager.GripSize = 13;
  vdcanvas.GripManager.SelectMode = vdConst.GRIPMODE_AUTO | vdConst.GRIPMODE_SINGLE; 
  vdcanvas.vdmousedown = _vdmousedown;
 }
 function _vdmousedown(args) {
    var grips  =[];
    var vdrawobj = args.target;
    var action = vdrawobj.ActiveAction();
    if (args.mousebutton == 1 && !action.IsStarted()) {//check grips only if left mouse button down and no action is started(only the default action is active)
        grips = vdrawobj.GripManager.GetGripIndexesFromPoint(args.xPix, args.yPix);
    }
    if (grips.length == 0) {//if no gris under the mouse 
        var fig = vdrawobj.GetEntityFromPoint(args.xPix, args.yPix);//scan if an entity is clicked
        if (fig) {
          //change the entity color to red and refresh the drawing view
          fig.PenColor = vdConst.colorFromString("255,0,0");
          vdrawobj.UpdateFig(fig);
          //update drawing view
          action.hide();
          vdrawobj.DrawEntity(fig);
          action.show();
        }
     }//else the default vdraw action is evaluate
            
  }

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