<!--
Copyright (c) 2006-2013, JGraph Ltd
Pagebreaks example for mxGraph. This example demonstrates using the
pageBreaksVisible and preferPageSize switches and adding headers and
footers to print output.
-->
<html>
<head>
<title>Pagebreaks example for mxGraph</title>
<!-- Sets the basepath for the library if not in same directory -->
<script type="text/javascript">
mxBasePath = '../src';
</script>
<!-- Loads and initializes the library -->
<script type="text/javascript" src="../src/js/mxClient.js"></script>
<!-- Example code -->
<script type="text/javascript">
// Program starts here. Creates a sample graph in the
// DOM node with the specified ID. This function is invoked
// from the onLoad event handler of the document (see below).
function main(container)
{
// Checks if the browser is supported
if (!mxClient.isBrowserSupported())
{
// Displays an error message if the browser is not supported.
mxUtils.error('Browser is not supported!', 200, false);
}
else
{
mxEvent.disableContextMenu(container);
// Creates the graph inside the given container
var graph = new mxGraph(container);
graph.view.setScale(0.15);
graph.pageBreaksVisible = true;
graph.pageBreakDashed = true;
graph.preferPageSize = true;
graph.centerZoom = false;
graph.setPanning(true);
// Account for the header and footer size in the page format
var headerSize = 100;
var footerSize = 100;
// Removes header and footer from page height
graph.pageFormat.height -= headerSize + footerSize;
// Takes zoom into account for moving cells
graph.graphHandler.scaleGrid = true;
// Enables rubberband selection
new mxRubberband(graph);
// Gets the default parent for inserting new cells. This
// is normally the first child of the root (ie. layer 0).
var parent = graph.getDefaultParent();
// Adds cells to the model in a single step
graph.getModel().beginUpdate();
try
{
var v1 = graph.insertVertex(parent, null, 'Hello,', 10, 10, 280, 330);
var v2 = graph.insertVertex(parent, null, 'World!',
graph.pageFormat.width * graph.pageScale - 280 - 10,
graph.pageFormat.height * graph.pageScale - 330 - 10,
280, 330);
var e1 = graph.insertEdge(parent, null, '', v1, v2);
}
finally
{
// Updates the display
graph.getModel().endUpdate();
}
document.body.appendChild(mxUtils.button('Toggle Page Breaks',
function(evt)
{
graph.pageBreaksVisible = !graph.pageBreaksVisible;
graph.sizeDidChange();
}
));
document.body.appendChild(mxUtils.button('Zoom In',
function(evt)
{
graph.zoomIn();
}
));
document.body.appendChild(mxUtils.button('Zoom Out',
function(evt)
{
graph.zoomOut();
}
));
document.body.appendChild(mxUtils.button('Print',
function(evt)
{
// Matches actual printer paper size and avoids blank pages
var scale = 0.5;
// Applies scale to page
var pf = mxRectangle.fromRectangle(graph.pageFormat || mxConstants.PAGE_FORMAT_A4_PORTRAIT);
pf.width = Math.round(pf.width * scale * graph.pageScale);
pf.height = Math.round(pf.height * scale * graph.pageScale);
// Finds top left corner of top left page
var bounds = mxRectangle.fromRectangle(graph.getGraphBounds());
bounds.x -= graph.view.translate.x * graph.view.scale;
bounds.y -= graph.view.translate.y * graph.view.scale;
var x0 = Math.floor(bounds.x / pf.width) * pf.width;
var y0 = Math.floor(bounds.y / pf.height) * pf.height;
var preview = new mxPrintPreview(graph, scale, pf, 0, -x0, -y0);
preview.marginTop = headerSize * scale * graph.pageScale;
preview.marginBottom = footerSize * scale * graph.pageScale;
preview.autoOrigin = false;
var oldRenderPage = preview.renderPage;
preview.renderPage = function(w, h, x, y, content, pageNumber)
{
var div = oldRenderPage.apply(this, arguments);
var header = document.createElement('div');
header.style.position = 'absolute';
header.style.boxSizing = 'border-box';
header.style.fontFamily = 'Arial,Helvetica';
header.style.height = (this.marginTop - 10) + 'px';
header.style.textAlign = 'center';
header.style.verticalAlign = 'middle';
header.style.marginTop = 'auto';
header.style.fontSize = '12px';
header.style.width = '100%';
// Vertical centering for text in header/footer
header.style.lineHeight = (this.marginTop - 10) + 'px';
var footer = header.cloneNode(true);
mxUtils.write(header, 'Page ' + pageNumber + ' - Header');
header.style.borderBottom = '1px solid gray';
header.style.top = '0px';
mxUtils.write(footer, 'Page ' + pageNumber + ' - Footer');
footer.style.borderTop = '1px solid gray';
footer.style.bottom = '0px';
div.firstChild.appendChild(footer);
div.firstChild.appendChild(header);
return div;
};
preview.open();
}
));
document.body.appendChild(mxUtils.button('Reset View',
function(evt)
{
graph.view.scaleAndTranslate(0.15, 0, 0);
}
));
}
};
</script>
</head>
<!-- Page passes the container for the graph to the program -->
<body onload="main(document.getElementById('graphContainer'))">
<!-- Creates a container for the graph with a grid wallpaper -->
<div id="graphContainer"
style="overflow:hidden;position:relative;width:641px;height:481px;background:url('editors/images/grid.gif');cursor:default;">
</div>
</body>
</html>