Control to modify features. When activated, a click renders the vertices of a feature - these vertices can then be dragged. By default, the delete key will delete the vertex under the mouse. New features are added by dragging “virtual vertices” between vertices. Create a new control with the ALKMaps.Control.ModifyFeature constructor.
| ALKMaps. | Control to modify features. |
| Properties | |
| geometryTypes | {Array(String)} To restrict modification to a limited set of geometry types, send a list of strings corresponding to the geometry class names. |
| clickout | {Boolean} Unselect features when clicking outside any feature. |
| toggle | {Boolean} Unselect a selected feature on click. |
| standalone | {Boolean} Set to true to create a control without SelectFeature capabilities. |
| layer | {ALKMaps.Layer.Vector} |
| feature | {ALKMaps.Feature.Vector} Feature currently available for modification. |
| vertices | {Array(ALKMaps.Feature.Vector)} Verticies currently available for dragging. |
| virtualVertices | {Array(ALKMaps.Feature.Vector)} Virtual vertices in the middle of each edge. |
| selectControl | {ALKMaps.Control.SelectFeature} |
| dragControl | {ALKMaps.Control.DragFeature} |
| handlers | {Object} |
| deleteCodes | {Array(Integer)} Keycodes for deleting verticies. |
| virtualStyle | {Object} A symbolizer to be used for virtual vertices. |
| vertexRenderIntent | {String} The renderIntent to use for vertices. |
| mode | {Integer} Bitfields specifying the modification mode. |
| createVertices | {Boolean} Create new vertices by dragging the virtual vertices in the middle of each edge. |
| modified | {Boolean} The currently selected feature has been modified. |
| radiusHandle | {ALKMaps.Feature.Vector} A handle for rotating/resizing a feature. |
| dragHandle | {ALKMaps.Feature.Vector} A handle for dragging a feature. |
| onModificationStart | {Function} Deprecated. |
| onModification | {Function} Deprecated. |
| onModificationEnd | {Function} Deprecated. |
| Constructor | |
| ALKMaps. | Create a new modify feature control. |
| Functions | |
| destroy | Take care of things that are not handled in superclass. |
| activate | Activate the control. |
| deactivate | Deactivate the control. |
| beforeSelectFeature | Called before a feature is selected. |
| selectFeature | Select a feature for modification in standalone mode. |
| unselectFeature | Called when the select feature control unselects a feature. |
| dragStart | Called by the drag feature control with before a feature is dragged. |
| dragVertex | Called by the drag feature control with each drag move of a vertex. |
| dragComplete | Called by the drag feature control when the feature dragging is complete. |
| setFeatureState | Called when the feature is modified. |
| resetVertices | |
| handleKeypress | Called by the feature handler on keypress. |
| collectVertices | Collect the vertices from the modifiable feature’s geometry and push them on to the control’s vertices array. |
| collectDragHandle | Collect the drag handle for the selected geometry. |
| collectRadiusHandle | Collect the radius handle for the selected geometry. |
| setMap | Set the map property for the control and all handlers. |
| Constants | |
| RESHAPE | {Integer} Constant used to make the control work in reshape mode |
| RESIZE | {Integer} Constant used to make the control work in resize mode |
| ROTATE | {Integer} Constant used to make the control work in rotate mode |
| DRAG | {Integer} Constant used to make the control work in drag mode |
{Boolean} Set to true to create a control without SelectFeature capabilities. Default is false. If standalone is true, to modify a feature, call the selectFeature method with the target feature. Note that you must call the unselectFeature method to finish feature modification in standalone mode (before starting to modify another feature).
{ALKMaps.Feature.Vector} Feature currently available for modification.
{Array(ALKMaps.Feature.Vector)} Verticies currently available for dragging.
{Array(ALKMaps.Feature.Vector)} Virtual vertices in the middle of each edge.
{String} The renderIntent to use for vertices. If no virtualStyle is provided, this renderIntent will also be used for virtual vertices, with a fillOpacity and strokeOpacity of 0.3. Default is null, which means that the layer’s default style will be used for vertices.
{Integer} Bitfields specifying the modification mode. Defaults to ALKMaps.Control.ModifyFeature.RESHAPE. To set the mode to a combination of options, use the | operator. For example, to allow the control to both resize and rotate features, use the following syntax
control.mode = ALKMaps.Control.ModifyFeature.RESIZE |
ALKMaps.Control.ModifyFeature.ROTATE;{ALKMaps.Feature.Vector} A handle for rotating/resizing a feature.
{ALKMaps.Feature.Vector} A handle for dragging a feature.
{Function} Deprecated. Register for “beforefeaturemodified” instead. The “beforefeaturemodified” event is triggered on the layer before any modification begins.
Optional function to be called when a feature is selected to be modified. The function should expect to be called with a feature. This could be used for example to allow to lock the feature on server-side.
{Function} Deprecated. Register for “afterfeaturemodified” instead. The “afterfeaturemodified” event is triggered on the layer after a feature has been modified.
Optional function to be called when a feature is finished being modified. The function should expect to be called with a feature.
Create a new modify feature control.
| layer | {ALKMaps.Layer.Vector} Layer that contains features that will be modified. |
| options | {Object} Optional object whose properties will be set on the control. |
beforeSelectFeature: function( feature )
Called before a feature is selected.
| feature | {ALKMaps.Feature.Vector} The feature about to be selected. |
selectFeature: function( feature )
Select a feature for modification in standalone mode. In non-standalone mode, this method is called when the select feature control selects a feature. Register a listener to the beforefeaturemodified event and return false to prevent feature modification.
| feature | {ALKMaps.Feature.Vector} the selected feature. |
unselectFeature: function( feature )
Called when the select feature control unselects a feature.
| feature | {ALKMaps.Feature.Vector} The unselected feature. |
dragStart: function( feature, pixel )
Called by the drag feature control with before a feature is dragged. This method is used to differentiate between points and vertices of higher order geometries. This respects the geometryTypes property and forces a select of points when the drag control is already active (and stops events from propagating to the select control).
| feature | {ALKMaps.Feature.Vector} The point or vertex about to be dragged. |
| pixel | {ALKMaps.Pixel} Pixel location of the mouse event. |
dragVertex: function( vertex, pixel )
Called by the drag feature control with each drag move of a vertex.
| vertex | {ALKMaps.Feature.Vector} The vertex being dragged. |
| pixel | {ALKMaps.Pixel} Pixel location of the mouse event. |
dragComplete: function( vertex )
Called by the drag feature control when the feature dragging is complete.
| vertex | {ALKMaps.Feature.Vector} The vertex being dragged. |
setMap: function( map )
Set the map property for the control and all handlers.
| map | {ALKMaps.Map} The control’s map. |
Take care of things that are not handled in superclass.
destroy: function()
Activate the control.
activate: function()
Deactivate the control.
deactivate: function()
Called before a feature is selected.
beforeSelectFeature: function( feature )
Select a feature for modification in standalone mode.
selectFeature: function( feature )
Called when the select feature control unselects a feature.
unselectFeature: function( feature )
Called by the drag feature control with before a feature is dragged.
dragStart: function( feature, pixel )
Called by the drag feature control with each drag move of a vertex.
dragVertex: function( vertex, pixel )
Called by the drag feature control when the feature dragging is complete.
dragComplete: function( vertex )
Called when the feature is modified.
setFeatureState: function()
resetVertices: function()
Called by the feature handler on keypress.
handleKeypress: function( evt )
Collect the vertices from the modifiable feature’s geometry and push them on to the control’s vertices array.
collectVertices: function()
Collect the drag handle for the selected geometry.
collectDragHandle: function()
Collect the radius handle for the selected geometry.
collectRadiusHandle: function()
Set the map property for the control and all handlers.
setMap: function( map )