001// License: GPL. For details, see LICENSE file. 002package org.openstreetmap.josm.gui.layer.geoimage; 003 004import static org.openstreetmap.josm.tools.I18n.tr; 005 006import java.awt.Component; 007import java.awt.event.ActionEvent; 008import java.util.List; 009 010import javax.swing.AbstractAction; 011import javax.swing.JCheckBoxMenuItem; 012 013import org.openstreetmap.josm.Main; 014import org.openstreetmap.josm.gui.layer.Layer; 015import org.openstreetmap.josm.gui.layer.Layer.LayerAction; 016import org.openstreetmap.josm.tools.ImageProvider; 017 018/** 019 * Toggle the image display between thumbnails and symbols. 020 * @since 7935 021 */ 022public class ShowThumbnailAction extends AbstractAction implements LayerAction { 023 024 private final transient GeoImageLayer layer; 025 026 /** 027 * Constructs a new {@code ToggleGeoImageThumbAction} action. 028 * @param layer image layer 029 */ 030 public ShowThumbnailAction(GeoImageLayer layer) { 031 super(tr("Show thumbnails"), ImageProvider.get("dialogs/geoimage/togglegit")); 032 putValue(SHORT_DESCRIPTION, tr("Show image thumbnails instead of icons.")); 033 this.layer = layer; 034 } 035 036 /** 037 * This is called after the menu entry was selected. 038 * @param arg0 action event 039 */ 040 @Override 041 public void actionPerformed(ActionEvent arg0) { 042 layer.setUseThumbs(!layer.isUseThumbs()); 043 Main.map.mapView.repaint(); 044 } 045 046 /** 047 * Check if there is any suitable image to be toggled. 048 * @param layer image layer 049 * @return {@code true} if there are images to be toggled, 050 * {@code false} otherwise 051 */ 052 private static boolean enabled(GeoImageLayer layer) { 053 return layer.data != null && !layer.data.isEmpty(); 054 } 055 056 /** Create actual menu entry and define if it is enabled or not. */ 057 @Override 058 public Component createMenuComponent() { 059 JCheckBoxMenuItem toggleItem = new JCheckBoxMenuItem(this); 060 toggleItem.setEnabled(enabled(layer)); 061 toggleItem.setState(layer.isUseThumbs()); 062 return toggleItem; 063 } 064 065 /** Check if the current layer is supported. */ 066 @Override 067 public boolean supportLayers(List<Layer> layers) { 068 return layers.size() == 1 && layers.get(0) instanceof GeoImageLayer; 069 } 070}