/*------------------------------------------------------------------------------*
 * File Name: ResizeLayer.c														*
 * Creation: ER, 01/17/05														*
 * Purpose: Programming Example													*
 * Copyright (c) OriginLab Corp.2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010	*
 * All Rights Reserved															*
 * 																				*
 * Modification Log:															*
 *------------------------------------------------------------------------------*/
 
#include <Origin.h>

/////////////////////////////////////////////////////////////////////////////////
// This example shows how to resize the current graph layer.
// The size is changed such that the aspect ratio of the layer is 1::1
// NOTE: It is assumed that a graph layer is active.
//
void resize_layer()
{
	// Declare graph layer and check validity
	GraphLayer gly = Project.ActiveLayer();
	if( !gly )
	{
		out_str("Active layer is not a graph layer!");
		return;
	}
	
	// Check current units used for layer dimension
	int nUnitsType = gly.Dimension.Units.nVal;
	bool bChangedUnits;
	
	Tree trFormat;	
	// If units are not set to inches, change to inches now
	// and get dimension properties into a tree
	if( nUnitsType != 1 )
	{
		gly.Dimension.Units.nVal = 1;
		trFormat = gly.Dimension;
		bChangedUnits = true;
	}
	// Report current dimensions
	out_str("Current settings for layer dimension:");
	out_tree(trFormat);
	
	// Now set the width to be same as the height
	trFormat.Width.dVal = trFormat.Height.dVal;
	// Apply tree back to make the change
	gly.Dimension = trFormat;

	// Report new dimensions
	out_str("New settings for layer dimension:");
	out_tree(trFormat);
	
	// Change units back to previous type if needed
	if( bChangedUnits )
		gly.Dimension.Units.nVal = nUnitsType;
	
	// Note: The reason we changed the units to inches before
	// setting width to be same as height is that if units are
	// in say % of Page size (which is the default), setting width
	// to be equal to height will not work correctly.
	// One does not have to switch only to inches.
	// Other untis like mm will work as well.
}
/////////////////////////////////////////////////////////////////////////////////