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Created control 'ContextMenu' for displaying controls in a panel appe…
…aring next to the selected features
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Mario Härtwig
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Feb 11, 2015
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,145 @@ | ||
| /** | ||
| * @copyright 2015 geOps | ||
| * @license https://github.com/geops/ole/blob/master/license.txt | ||
| * @link https://github.com/geops/ole | ||
| */ | ||
|
|
||
| /** | ||
| * Class: OpenLayers.Editor.Control.ContextMenu | ||
| * The ContextMenu contains editor controls | ||
| * and is opened on feature selection | ||
| * | ||
| * Inherits from: | ||
| * - <OpenLayers.Control.Panel> | ||
| * | ||
| * @constructor | ||
| * @param {OpenLayers.Layer} The editor layer | ||
| * @param {Object=} options | ||
| */ | ||
| OpenLayers.Editor.Control.ContextMenu = OpenLayers.Class(OpenLayers.Control.Panel, { | ||
|
|
||
| /** | ||
| * {Number} Type of the control | ||
| */ | ||
| type: OpenLayers.Control.TYPE_BUTTON, | ||
|
|
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| /** | ||
| * {Number} Distance (in pixel) of the context menu to the bbox | ||
| * of the selected features | ||
| */ | ||
| menuBufferDistance: 10, | ||
|
|
||
| /** | ||
| * {Array} Contains list of controls appearing on context menu | ||
| */ | ||
| contextMenuControls: ['CleanFeature', 'DeleteFeature', 'DrawHole', | ||
| 'MergeFeature', 'SplitFeature', 'TransformFeature'], | ||
|
|
||
| /** | ||
| * Constructor OpenLayers.Editor.Control.ContextMenu | ||
| * | ||
| * Parameters: | ||
| * @param {OpenLayers.Layer} The editor layer | ||
| * @param {Object} options | ||
| */ | ||
| initialize: function (layer, options) { | ||
| layer.events.register('featureselected', this, this.openContextMenu); | ||
| layer.events.register('featureunselected', this, this.closeContextMenu); | ||
| layer.map.events.register('move', this, this.updatePosition); | ||
|
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| OpenLayers.Control.Panel.prototype.initialize.apply(this, [options]); | ||
|
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| layer.map.addControl(this); | ||
| }, | ||
|
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||
| /** | ||
| * Move all context menu controls from editor panel | ||
| * to this panel | ||
| */ | ||
| addContextMenuControls: function() { | ||
| var controls = []; | ||
| for (var i = 0; i < this.contextMenuControls.length; i++) { | ||
| var controlName = this.contextMenuControls[i]; | ||
| var control = this.map.editor.controls[controlName]; | ||
| if (control) { | ||
| controls.push(control); | ||
| } | ||
| } | ||
|
|
||
| this.addControls(controls); | ||
| }, | ||
|
|
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| /** | ||
| * Open the context menu | ||
| */ | ||
| openContextMenu: function() { | ||
| this.div.style.display = ''; | ||
| this.addContextMenuControls(); | ||
| this.activate(); | ||
| this.updatePosition(); | ||
|
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||
| for (var i = 0; i < this.controls.length; i++) { | ||
| OpenLayers.Element.removeClass(this.controls[i].panel_div, | ||
| 'oleControlDisabled'); | ||
| } | ||
| }, | ||
|
|
||
| /** | ||
| * Close the context menu | ||
| */ | ||
| closeContextMenu: function() { | ||
| if (!this.map.editor.editLayer.selectedFeatures.length) { | ||
| this.div.style.display = 'none'; | ||
| this.deactivate(); | ||
| } | ||
| }, | ||
|
|
||
| /** | ||
| * Place the context menu on the point on the selected features' | ||
| * bounding box with the smallest distance to the map center. | ||
| */ | ||
| updatePosition: function() { | ||
| var selFeatures = this.map.editor.editLayer.selectedFeatures; | ||
|
|
||
| if (!selFeatures.length) { | ||
| return; | ||
| } | ||
|
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| var bounds = new OpenLayers.Bounds(); | ||
| var mapCenter = this.map.getExtent().getCenterLonLat(); | ||
| mapCenter = new OpenLayers.Geometry.Point( | ||
| mapCenter.lon, mapCenter.lat); | ||
|
|
||
| for (var i = 0; i < (selFeatures || []).length; i++) { | ||
| bounds.extend(selFeatures[i].geometry.getBounds()); | ||
| } | ||
|
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||
| var dist = bounds.toGeometry().distanceTo(mapCenter, | ||
| {'details': true}) || {'x0': bounds.left, 'y0': bounds.top}; | ||
|
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| var menuPosition = this.map.getPixelFromLonLat( | ||
| new OpenLayers.LonLat(dist.x0, dist.y0)); | ||
|
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| this.div.style.right = 'initial'; | ||
| this.div.style.left = menuPosition.x + 'px'; | ||
| this.div.style.top = menuPosition.y + 'px'; | ||
|
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||
| if (dist.y0 === bounds.top) { | ||
| this.div.style.top = parseInt(this.div.style.top) - | ||
| this.menuBufferDistance - this.div.clientHeight + 'px'; | ||
| } else if (dist.y0 === bounds.bottom) { | ||
| this.div.style.top = parseInt(this.div.style.top) + | ||
| this.menuBufferDistance + 'px'; | ||
| } | ||
|
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| if (dist.x0 === bounds.left) { | ||
| this.div.style.left = parseInt(this.div.style.left) - | ||
| this.menuBufferDistance - this.div.clientWidth + 'px'; | ||
| } else if (dist.x0 === bounds.right) { | ||
| this.div.style.left = parseInt(this.div.style.left) + | ||
| this.menuBufferDistance + 'px'; | ||
| } | ||
| }, | ||
|
|
||
| CLASS_NAME: 'oleContextMenu OpenLayers.Editor.Control.EditorPanel' | ||
| }); |
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