1 | // License: GPL. Copyright 2007 by Immanuel Scholz and others
|
---|
2 | package org.openstreetmap.josm.actions;
|
---|
3 |
|
---|
4 | import static org.openstreetmap.josm.tools.I18n.tr;
|
---|
5 |
|
---|
6 | import java.util.Collection;
|
---|
7 |
|
---|
8 | import javax.swing.AbstractAction;
|
---|
9 |
|
---|
10 | import org.openstreetmap.josm.Main;
|
---|
11 | import org.openstreetmap.josm.data.SelectionChangedListener;
|
---|
12 | import org.openstreetmap.josm.data.osm.DataSet;
|
---|
13 | import org.openstreetmap.josm.data.osm.OsmPrimitive;
|
---|
14 | import org.openstreetmap.josm.data.osm.PrimitiveDeepCopy;
|
---|
15 | import org.openstreetmap.josm.gui.MapView;
|
---|
16 | import org.openstreetmap.josm.gui.layer.Layer;
|
---|
17 | import org.openstreetmap.josm.gui.layer.OsmDataLayer;
|
---|
18 | import org.openstreetmap.josm.tools.Destroyable;
|
---|
19 | import org.openstreetmap.josm.tools.ImageProvider;
|
---|
20 | import org.openstreetmap.josm.tools.Shortcut;
|
---|
21 |
|
---|
22 | /**
|
---|
23 | * Base class helper for all Actions in JOSM. Just to make the life easier.
|
---|
24 | *
|
---|
25 | * A JosmAction is a {@see LayerChangeListener} and a {@see SelectionChangedListener}. Upon
|
---|
26 | * a layer change event or a selection change event it invokes {@see #updateEnabled()}.
|
---|
27 | * Subclasses can override {@see #updateEnabled()} in order to update the {@see #isEnabled()}-state
|
---|
28 | * of a JosmAction depending on the {@see #getCurrentDataSet()} and the current layers
|
---|
29 | * (see also {@see #getEditLayer()}).
|
---|
30 | *
|
---|
31 | * destroy() from interface Destroyable is called e.g. for MapModes, when the last layer has
|
---|
32 | * been removed and so the mapframe will be destroyed. For other JosmActions, destroy() may never
|
---|
33 | * be called (currently).
|
---|
34 | *
|
---|
35 | * @author imi
|
---|
36 | */
|
---|
37 | abstract public class JosmAction extends AbstractAction implements Destroyable {
|
---|
38 |
|
---|
39 | protected Shortcut sc;
|
---|
40 | private LayerChangeAdapter layerChangeAdapter;
|
---|
41 | private SelectionChangeAdapter selectionChangeAdapter;
|
---|
42 |
|
---|
43 | public Shortcut getShortcut() {
|
---|
44 | if (sc == null) {
|
---|
45 | sc = Shortcut.registerShortcut("core:none", tr("No Shortcut"), 0, Shortcut.GROUP_NONE);
|
---|
46 | // as this shortcut is shared by all action that don't want to have a shortcut,
|
---|
47 | // we shouldn't allow the user to change it...
|
---|
48 | // this is handled by special name "core:none"
|
---|
49 | }
|
---|
50 | return sc;
|
---|
51 | }
|
---|
52 |
|
---|
53 | /**
|
---|
54 | * The new super for all actions.
|
---|
55 | *
|
---|
56 | * Use this super constructor to setup your action. It takes 5 parameters:
|
---|
57 | *
|
---|
58 | * @param name the action's text as displayed on the menu (if it is added to a menu)
|
---|
59 | * @param iconName the filename of the icon to use
|
---|
60 | * @param tooltip a longer description of the action that will be displayed in the tooltip. Please note
|
---|
61 | * that html is not supported for menu actions on some platforms.
|
---|
62 | * @param shortcut a ready-created shortcut object or null if you don't want a shortcut. But you always
|
---|
63 | * do want a shortcut, remember you can always register it with group=none, so you
|
---|
64 | * won't be assigned a shortcut unless the user configures one. If you pass null here,
|
---|
65 | * the user CANNOT configure a shortcut for your action.
|
---|
66 | * @param register register this action for the toolbar preferences?
|
---|
67 | */
|
---|
68 | public JosmAction(String name, String iconName, String tooltip, Shortcut shortcut, boolean register) {
|
---|
69 | super(name, iconName == null ? null : ImageProvider.get(iconName));
|
---|
70 | setHelpId();
|
---|
71 | sc = shortcut;
|
---|
72 | if (sc != null) {
|
---|
73 | Main.registerActionShortcut(this, sc);
|
---|
74 | }
|
---|
75 | putValue(SHORT_DESCRIPTION, Main.platform.makeTooltip(tooltip, sc));
|
---|
76 | putValue("toolbar", iconName);
|
---|
77 | if (register) {
|
---|
78 | Main.toolbar.register(this);
|
---|
79 | }
|
---|
80 | installAdapters();
|
---|
81 | }
|
---|
82 |
|
---|
83 | public JosmAction() {
|
---|
84 | setHelpId();
|
---|
85 | installAdapters();
|
---|
86 | }
|
---|
87 |
|
---|
88 | public void destroy() {
|
---|
89 | if (sc != null) {
|
---|
90 | Main.unregisterActionShortcut(sc);
|
---|
91 | }
|
---|
92 | MapView.removeLayerChangeListener(layerChangeAdapter);
|
---|
93 | DataSet.selListeners.remove(selectionChangeAdapter);
|
---|
94 | }
|
---|
95 |
|
---|
96 | /**
|
---|
97 | * needs to be overridden to be useful
|
---|
98 | */
|
---|
99 | public void pasteBufferChanged(PrimitiveDeepCopy newPasteBuffer) {
|
---|
100 | return;
|
---|
101 | }
|
---|
102 |
|
---|
103 | /**
|
---|
104 | * needs to be overridden to be useful
|
---|
105 | */
|
---|
106 | public void addListener(JosmAction a) {
|
---|
107 | return;
|
---|
108 | }
|
---|
109 |
|
---|
110 | private void setHelpId() {
|
---|
111 | String helpId = "Action/"+getClass().getName().substring(getClass().getName().lastIndexOf('.')+1);
|
---|
112 | if (helpId.endsWith("Action")) {
|
---|
113 | helpId = helpId.substring(0, helpId.length()-6);
|
---|
114 | }
|
---|
115 | putValue("help", helpId);
|
---|
116 | }
|
---|
117 |
|
---|
118 | /**
|
---|
119 | * Replies the current edit layer
|
---|
120 | *
|
---|
121 | * @return the current edit layer. null, if no edit layer exists
|
---|
122 | */
|
---|
123 | protected OsmDataLayer getEditLayer() {
|
---|
124 | return Main.main.getEditLayer();
|
---|
125 | }
|
---|
126 |
|
---|
127 | /**
|
---|
128 | * Replies the current dataset
|
---|
129 | *
|
---|
130 | * @return the current dataset. null, if no current dataset exists
|
---|
131 | */
|
---|
132 | protected DataSet getCurrentDataSet() {
|
---|
133 | return Main.main.getCurrentDataSet();
|
---|
134 | }
|
---|
135 |
|
---|
136 | protected void installAdapters() {
|
---|
137 | // make this action listen to layer change and selection change events
|
---|
138 | //
|
---|
139 | layerChangeAdapter = new LayerChangeAdapter();
|
---|
140 | selectionChangeAdapter = new SelectionChangeAdapter();
|
---|
141 | MapView.addLayerChangeListener(layerChangeAdapter);
|
---|
142 | DataSet.selListeners.add(selectionChangeAdapter);
|
---|
143 | initEnabledState();
|
---|
144 | }
|
---|
145 |
|
---|
146 | /**
|
---|
147 | * Override in subclasses to init the enabled state of an action when it is
|
---|
148 | * created. Default behaviour is to call {@see #updateEnabledState()}
|
---|
149 | *
|
---|
150 | * @see #updateEnabledState()
|
---|
151 | * @see #updateEnabledState(Collection)
|
---|
152 | */
|
---|
153 | protected void initEnabledState() {
|
---|
154 | updateEnabledState();
|
---|
155 | }
|
---|
156 |
|
---|
157 | /**
|
---|
158 | * Override in subclasses to update the enabled state of the action when
|
---|
159 | * something in the JOSM state changes, i.e. when a layer is removed or added.
|
---|
160 | *
|
---|
161 | * See {@see #updateEnabledState(Collection)} to respond to changes in the collection
|
---|
162 | * of selected primitives.
|
---|
163 | *
|
---|
164 | * Default behavior is empty.
|
---|
165 | *
|
---|
166 | * @see #updateEnabledState(Collection)
|
---|
167 | * @see #initEnabledState()
|
---|
168 | */
|
---|
169 | protected void updateEnabledState() {
|
---|
170 | }
|
---|
171 |
|
---|
172 | /**
|
---|
173 | * Override in subclasses to update the enabled state of the action if the
|
---|
174 | * collection of selected primitives changes. This method is called with the
|
---|
175 | * new selection. Avoid calling getCurrentDataSet().getSelected() because this
|
---|
176 | * loops over the complete data set.
|
---|
177 | *
|
---|
178 | * @param selection the collection of selected primitives
|
---|
179 | *
|
---|
180 | * @see #updateEnabledState()
|
---|
181 | * @see #initEnabledState()
|
---|
182 | */
|
---|
183 | protected void updateEnabledState(Collection<? extends OsmPrimitive> selection) {
|
---|
184 | }
|
---|
185 |
|
---|
186 | /**
|
---|
187 | * Adapter for layer change events
|
---|
188 | *
|
---|
189 | */
|
---|
190 | private class LayerChangeAdapter implements MapView.LayerChangeListener {
|
---|
191 | public void activeLayerChange(Layer oldLayer, Layer newLayer) {
|
---|
192 | updateEnabledState();
|
---|
193 | }
|
---|
194 |
|
---|
195 | public void layerAdded(Layer newLayer) {
|
---|
196 | updateEnabledState();
|
---|
197 | }
|
---|
198 |
|
---|
199 | public void layerRemoved(Layer oldLayer) {
|
---|
200 | updateEnabledState();
|
---|
201 | }
|
---|
202 | }
|
---|
203 |
|
---|
204 | /**
|
---|
205 | * Adapter for selection change events
|
---|
206 | *
|
---|
207 | */
|
---|
208 | private class SelectionChangeAdapter implements SelectionChangedListener {
|
---|
209 | public void selectionChanged(Collection<? extends OsmPrimitive> newSelection) {
|
---|
210 | updateEnabledState(newSelection);
|
---|
211 | }
|
---|
212 | }
|
---|
213 | }
|
---|