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