public void MouseUp(MouseEventArgs e)
{
if (IsActive)
{
DeactivateTool();
TransformCommand cmd = new TransformCommand(this.Controller, origin, scalex, scaley, transformers);
this.Controller.UndoManager.AddUndoCommand(cmd);
}
}
public void MouseUp(MouseEventArgs e)
{
if (IsActive)
{
DeactivateTool();
TransformCommand cmd = new TransformCommand(this.Controller, origin, scalex, scaley, transformers);
this.Controller.UndoManager.AddUndoCommand(cmd);
}
}
public void MouseMove(MouseEventArgs e)
{
#region Checking the incoming data
if (e == null)
{
throw new ArgumentNullException("The argument object is 'null'");
}
#endregion
#region Definition to make the code more readable
//some annoying but necessary type conversions here to double precision
double lastLength = 0; //the diagonal length of the current rectangle we are resizing
double eX = e.X, eY = e.Y; //the vector corresponding to the mouse location
double lx = lastPoint.X, ly = lastPoint.Y; // the lastpoint vector
double iX = initialPoint.X, iY = initialPoint.Y; // the vactor when the motion started
double mx, my; //the motion vector
double rx = 0, ry = 0; //the resulting vector
double sign = 1;
#endregion
if (IsActive)
{
#region The current motion vector is computed
mx = eX - lx;
my = eY - ly;
#endregion
#region Switching between the different compass directions of the grips
//the transform is the compass direction of the grip used to resize the entities
switch (transform)
{
#region NW
case TransformTypes.NW:
//the region above the X-Y=0 diagonal uses the horizontal to project the motion vector onto the diagonal
if (mx - my < 0)
{
scale = (ox - (double)e.X) / (ox - (double)initialPoint.X);
}
else
{
scale = (oy - (double)e.Y) / (oy - (double)initialPoint.Y);
}
//now we can pass the info the the scaling method of the selected entities
scalex = scale;
scaley = scale;
break;
#endregion
#region N
case TransformTypes.N:
//remember that the coordinate system has its Y-axis pointing downwards
scale = (oy - (double)e.Y) / (oy - (double)initialPoint.Y);
//now we can pass the info the the scaling method of the selected entities
scalex = 1F;
scaley = scale;
break;
#endregion
#region NE
case TransformTypes.NE:
//the region above the X-Y=0 diagonal uses the horizontal to project the motion vector onto the diagonal
if (mx + my > 0)
{
scale = ((double)e.X - ox) / ((double)initialPoint.X - ox);
}
else
{
scale = ((double)e.Y - oy) / ((double)initialPoint.Y - oy);
}
//now we can pass the info the the scaling method of the selected entities
scalex = scale;
scaley = scale;
break;
#endregion
#region E
case TransformTypes.E:
//remember that the coordinate system has its Y-axis pointing downwards
scale = ((double)e.X - ox) / ((double)initialPoint.X - ox);
//now we can pass the info the the scaling method of the selected entities
scalex = scale;
scaley = 1F;
break;
#endregion
#region SE
case TransformTypes.SE:
//I'd call this the Visio effect...
if (mx - my > 0)
{
scale = ((double)e.X - ox) / ((double)initialPoint.X - ox);
}
else
{
scale = ((double)e.Y - oy) / ((double)initialPoint.Y - oy);
}
scalex = scale;
scaley = scale;
break;
#endregion
#region S
case TransformTypes.S:
//remember that the coordinate system has its Y-axis pointing downwards
scale = ((double)e.Y - oy) / ((double)initialPoint.Y - oy);
//now we can pass the info the the scaling method of the selected entities
scalex = 1F;
scaley = scale;
break;
#endregion
#region SW
case TransformTypes.SW:
//the region above the X-Y=0 diagonal uses the horizontal to project the motion vector onto the diagonal
if (mx + my < 0)
{
scale = ((double)e.X - ox) / ((double)initialPoint.X - ox);
}
else
{
scale = ((double)e.Y - oy) / ((double)initialPoint.Y - oy);
}
//now we can pass the info the the scaling method of the selected entities
scalex = scale;
scaley = scale;
break;
#endregion
#region W
case TransformTypes.W:
//remember that the coordinate system has its Y-axis pointing downwards
scale = (ox - (double)e.X) / (ox - (double)initialPoint.X);
//now we can pass the info the the scaling method of the selected entities
scalex = scale;
scaley = 1F;
break;
#endregion
}
#endregion
#region Scale the selected entities
//block scaling below some minimum
if (lastLength <= 70 && sign == -1)
{
return;
}
//no need to use the rounding Convert method since the ox and oy doubles are really integers
//but the calculations above requires double data types.
origin = new Point(Convert.ToInt32(ox), Convert.ToInt32(oy));
//update the location of the last point
lastPoint.Offset(Convert.ToInt32(rx), Convert.ToInt32(ry));
TransformCommand.Transform(origin, scalex, scaley, transformers);
#endregion
//since we used the flattened selection the group shapes are unaware of the the resize, so we
//have to recalculate the group rectangles
foreach (IDiagramEntity entity in Selection.SelectedItems)
{
//the calculation will cascade to subgroups if necessary
if (entity is IGroup)
{
(entity as IGroup).CalculateRectangle();
}
}
//update the state of the tracker, i.e show it again and it'll be recalculated
this.Controller.View.ShowTracker();
}
}