graphwiz.js revision cf22150eaeeb72431bf1cf65c309a431454fb22b
/* $Id$ */
/** @file
* JavaScript functions for the Graph Wizard.
*/
/*
*
* Copyright (C) 2012-2014 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*/
/*******************************************************************************
* Global Variables *
*******************************************************************************/
/** The previous width of the div element that we measure. */
var g_cxPreviousWidth = 0;
/**
* onload function that sets g_cxPreviousWidth to the width of @a sWidthSrcId.
*
* @returns true.
* @param sWidthSrcId The ID of the element which width we should measure.
*/
function graphwizOnLoadRememberWidth(sWidthSrcId)
{
var cx = getUnscaledElementWidthById(sWidthSrcId);
if (cx)
{
g_cxPreviousWidth = cx;
}
return true;
}
/**
* onresize callback function that scales the given graph width input field
* value according to the resized element.
*
* @returns true.
* @param sWidthSrcId The ID of the element which width we should measure
* the resize effect on.
* @param sWidthInputId The ID of the input field which values should be
* scaled.
*
* @remarks Since we're likely to get several resize calls as part of one user
* resize operation, we're likely to suffer from some rounding
* artifacts. So, should the user abort or undo the resizing, the
* width value is unlikely to be restored to the exact value it had
* prior to the resizing.
*/
function graphwizOnResizeRecalcWidth(sWidthSrcId, sWidthInputId)
{
var cx = getUnscaledElementWidthById(sWidthSrcId);
if (cx)
{
var oElement = document.getElementById(sWidthInputId);
if (oElement && g_cxPreviousWidth)
{
var cxOld = oElement.value;
if (isInteger(cxOld))
{
var fpRatio = cxOld / g_cxPreviousWidth;
oElement.value = Math.round(cx * fpRatio);
}
}
g_cxPreviousWidth = cx;
}
return true;
}
/**
* Fills thegraph size (cx, cy) and dpi fields with default values.
*
* @returns false (for onclick).
* @param sWidthSrcId The ID of the element which width we should measure.
* @param sWidthInputId The ID of the graph width field (cx).
* @param sHeightInputId The ID of the graph height field (cy).
* @param sDpiInputId The ID of the graph DPI field.
*/
function graphwizSetDefaultSizeValues(sWidthSrcId, sWidthInputId, sHeightInputId, sDpiInputId)
{
var cx = getUnscaledElementWidthById(sWidthSrcId);
var cDotsPerInch = getDeviceXDotsPerInch();
if (cx)
{
setInputFieldValue(sWidthInputId, cx);
setInputFieldValue(sHeightInputId, Math.round(cx * 5 / 16)); /* See wuimain.py. */
}
if (cDotsPerInch)
{
setInputFieldValue(sDpiInputId, cDotsPerInch);
}
return false;
}