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Adding layer for generating dynamic point grids. r=bartvde (closes #3344)

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git-svn-id: http://svn.openlayers.org/trunk/openlayers@12099 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
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Tim Schaub
2011-06-17 18:18:40 +00:00
parent 6e3879f5b6
commit abdb336354
8 changed files with 799 additions and 0 deletions
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<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width; initial-scale=1.0; maximum-scale=1.0; user-scalable=0;">
<meta name="apple-mobile-web-app-capable" content="yes">
<title>OpenLayers Point Grid Example</title>
<link rel="stylesheet" href="../theme/default/style.css" type="text/css">
<link rel="stylesheet" href="style.css" type="text/css">
<style type="text/css">
.olControlAttribution {
left: 5px;
bottom: 5px;
}
</style>
</head>
<body>
<h1 id="title">Point Grid Example</h1>
<div id="tags">
point grid
</div>
<div id="shortdesc">Use a PointGrid layer to display a grid of regularly spaced points</div>
<div id="map" class="smallmap"></div>
Grid rotation:
<select name="rotation" id="rotation">
<option value="-45">-45</option>
<option value="-30">-30</option>
<option value="-15">-15</option>
<option value="0">0</option>
<option value="15">15</option>
<option value="30">30</option>
<option value="45">45</option>
</select>
&nbsp;
Grid spacing:
<select name="dx" id="dx">
<option value="10">10</option>
<option value="15">15</option>
<option value="20">20</option>
<option value="25">25</option>
<option value="30">30</option>
</select> x
<select name="dy" id="dy">
<option value="10">10</option>
<option value="15">15</option>
<option value="20">20</option>
<option value="25">25</option>
<option value="30">30</option>
</select>
&nbsp;
Max points:
<select name="max" id="max">
<option value="150">150</option>
<option value="250">250</option>
<option value="350">350</option>
</select>
<div class="docs">
<p>
This example demonstrates a <code>OpenLayers.Layer.PointGrid</code>
layer to render a regularly spaced grid of point features.
</p><p>
See the <a href="point-grid.js" target="_blank">
point-grid.js source</a> to see how this is done.
</p>
</div>
<script src="../lib/OpenLayers.js"></script>
<script src="point-grid.js"></script>
</body>
</html>

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examples/point-grid.js Normal file
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var points = new OpenLayers.Layer.PointGrid({
isBaseLayer: true, dx: 15, dy: 15
});
var map = new OpenLayers.Map({
div: "map",
layers: [points],
center: new OpenLayers.LonLat(0, 0),
zoom: 2
});
var rotation = document.getElementById("rotation");
rotation.value = String(points.rotation);
rotation.onchange = function() {
points.setRotation(Number(rotation.value));
}
var dx = document.getElementById("dx");
var dy = document.getElementById("dy");
dx.value = String(points.dx);
dy.value = String(points.dy);
dx.onchange = function() {
points.setSpacing(Number(dx.value), Number(dy.value));
}
dy.onchange = function() {
points.setSpacing(Number(dx.value), Number(dy.value));
}
var max = document.getElementById("max");
max.value = String(points.maxFeatures);
max.onchange = function() {
points.setMaxFeatures(Number(max.value));
}

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<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width; initial-scale=1.0; maximum-scale=1.0; user-scalable=0;">
<meta name="apple-mobile-web-app-capable" content="yes">
<title>OpenLayers Snap Grid Example</title>
<link rel="stylesheet" href="../theme/default/style.css" type="text/css">
<link rel="stylesheet" href="style.css" type="text/css">
<style type="text/css">
.olControlAttribution {
left: 5px;
bottom: 5px;
}
.olControlEditingToolbar .olControlModifyFeatureItemInactive {
background-position: -1px -1px;
}
.olControlEditingToolbar .olControlModifyFeatureItemActive {
background-position: -1px -24px;
}
</style>
</head>
<body>
<h1 id="title">Snap Grid Example</h1>
<div id="tags">
snap grid
</div>
<div id="shortdesc">Use a PointGrid layer and a Snapping control to snap to a grid of regularly spaced points</div>
<div id="map" class="smallmap"></div>
Grid rotation:
<select name="rotation" id="rotation">
<option value="-45">-45</option>
<option value="-30">-30</option>
<option value="-15">-15</option>
<option value="0">0</option>
<option value="15">15</option>
<option value="30">30</option>
<option value="45">45</option>
</select>
&nbsp;
Grid spacing:
<select name="spacing" id="spacing">
<option value="150">150</option>
<option value="300">300</option>
<option value="600">600</option>
<option value="1200">1200</option>
<option value="2400">2400</option>
</select>
&nbsp;
Max points:
<select name="max" id="max">
<option value="150">150</option>
<option value="250">250</option>
<option value="350">350</option>
</select>
<div class="docs">
<p>
This example demonstrates feature editing with snapping to a regular
grid. The map is configured with a <code>OpenLayers.Layer.PointGrid</code>
layer and a <code>OpenLayers.Control.Snapping</code> agent. For the
best performance, the point grid layer should not made visible.
Snapping still works with layers that are not visible.
</p><p>
See the <a href="snap-grid.js" target="_blank">
snap-grid.js source</a> to see how this is done.
</p>
</div>
<script src="../lib/OpenLayers.js"></script>
<script src="snap-grid.js"></script>
</body>
</html>

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var points = new OpenLayers.Layer.PointGrid({
name: "Snap Grid",
dx: 600, dy: 600,
styleMap: new OpenLayers.StyleMap({
pointRadius: 1,
strokeColor: "#3333ff",
strokeWidth: 1,
fillOpacity: 1,
fillColor: "#ffffff",
graphicName: "square"
})
});
var lines = new OpenLayers.Layer.Vector("Lines", {
styleMap: new OpenLayers.StyleMap({
pointRadius: 3,
strokeColor: "#ff3300",
strokeWidth: 3,
fillOpacity: 0
})
});
var map = new OpenLayers.Map({
div: "map",
layers: [new OpenLayers.Layer.OSM(), points, lines],
controls: [
new OpenLayers.Control.Navigation(),
new OpenLayers.Control.LayerSwitcher(),
new OpenLayers.Control.Attribution()
],
restrictedExtent: new OpenLayers.Bounds(
1035374, 7448940, 1074510, 7468508
),
center: new OpenLayers.LonLat(1054942, 7458724),
zoom: 13
});
// configure the snapping agent
var snap = new OpenLayers.Control.Snapping({
layer: lines,
targets: [{
layer: points,
tolerance: 15
}]
});
snap.activate();
// add some editing tools to a panel
var panel = new OpenLayers.Control.Panel({
displayClass: "olControlEditingToolbar"
});
var draw = new OpenLayers.Control.DrawFeature(
lines, OpenLayers.Handler.Path,
{displayClass: "olControlDrawFeaturePath", title: "Draw Features"}
);
modify = new OpenLayers.Control.ModifyFeature(
lines, {displayClass: "olControlModifyFeature", title: "Modify Features"}
);
panel.addControls([
new OpenLayers.Control.Navigation({title: "Navigate"}),
modify, draw
]);
map.addControl(panel);
var rotation = document.getElementById("rotation");
rotation.value = String(points.rotation);
rotation.onchange = function() {
points.setRotation(Number(rotation.value));
}
var spacing = document.getElementById("spacing");
spacing.value = String(points.dx);
spacing.onchange = function() {
points.setSpacing(Number(spacing.value));
}
var max = document.getElementById("max");
max.value = String(points.maxFeatures);
max.onchange = function() {
points.setMaxFeatures(Number(max.value));
}