leaflet打印地图easyPrint

leaflet-easyPrint

A simple leaflet plugin which adds an icon to print or export a map.

Features

• Supports resizing to predefined sizes (A4 Landscape & Portrait) as well as custom sizes
• Supports saving to png, as well as printing
• Compatible with both Leaflet v1+ and 0.7
• Tested on Chrome, Firefox
  • Incompatible with IE & Edge due to dom-to-image dependency

Check out the demo.

Download

You can either download this repo directly or install via NPM.

npm install leaflet-easyprint

Options

You can pass a number of options to the plugin to control various settings.

Option	Type	Default	Description
title	string	'Print map'	Sets the text which appears as the tooltip of the print/export button
position	Leaflet control position	'topleft'	Positions the print button
sizeModes	array	Current	Options available include Current, A4Portrait, A4Landscape or a custom size object
defaultSizeTitles	object	{Current: 'Current Size', A4Landscape: 'A4 Landscape', A4Portrait: 'A4 Portrait'}	button tooltips for the default page sizes
exportOnly	Boolean	false	If set to true the map is exported to a png file
tileLayer	Leaflet tile layer	null	A tile layer that you can wait for to draw (helpful when resizing)
tileWait	Integer	500	How long to wait for the tiles to draw (helpful when resizing)
filename	string	'map'	Name of the file if export only option set to true
hidden	Boolean	false	Set to true if you don't want to display the toolbar. Instead you can create your own buttons or fire print events programmatically. You still need to call addTo(map) to set the leaflet map context.
hideControlContainer	Boolean	true	Hides the leaflet controls like the zoom buttons and the attribution on the print out.
hideClasses	array	[]	Hides classes on the print out. Use an array of strings as follow : ['div1', 'div2']
customWindowTitle	string	Defaults to title of map window.	A title for the print window which will get added the printed paper.
spinnerBgColor	string	'#0DC5C1'	A valid css colour for the spinner background color.
customSpinnerClass	string	'epLoader'	A class for a custom css spinner to use while waiting for the print.

Example

L.easyPrint({
	title: 'My awesome print button',
	position: 'bottomright',
	sizeModes: ['A4Portrait', 'A4Landscape']
}).addTo(map);

Methods / Using programmatically

Method	Options	Description
printMap(size, filename)	Print size name, either 'CurrentSize', 'A4Portrait', 'A4Landscape', or the className of a custom size. And a filename	Manually trigger a print operation

var printPlugin = L.easyPrint({
	hidden: true,
	sizeModes: ['A4Portrait']
}).addTo(map); 
printPlugin.printMap('A4Portrait', 'MyFileName');

Custom Print Sizes

You can create additional print sizes by passing in some options. Width & Height are defined in pixels at 90DPI. THe css class ought to contain a background base64 encoded svg image.

var a3Size = {
	width: 2339,
	height: 3308,
	className: 'a3CssClass',
	tooltip: 'A custom A3 size'
}

// in css 
.easyPrintHolder .a3CssClass { 
  background-image: url(data:image/svg+xml;utf8;base64,PD9...go=);
}

Acknowledgements

Huge hats off go to mourner and all the contributors to the leaflet.js project, it's an amazing piece of open source software!

Also uses dom-to-image and FileSaver under the hood.

https://github.com/rowanwins/leaflet-easyPrint