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.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 transient 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")); 031 new ImageProvider("dialogs/geoimage/togglegit").getResource().attachImageIcon(this, true); 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 e action event 039 */ 040 @Override 041 public void actionPerformed(ActionEvent e) { 042 layer.setUseThumbs(!layer.isUseThumbs()); 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.getImageData().getImages().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}