svn-gvsig-desktop / trunk / applications / appgvSIG / src / com / iver / cit / gvsig / ZoomPrev.java @ 312
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| 1 | 312 | fernando | package com.iver.cit.gvsig; |
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| 2 | |||
| 3 | import com.iver.cit.gvsig.fmap.FMap; |
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| 4 | import com.iver.cit.gvsig.fmap.ViewPort; |
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| 5 | import com.iver.cit.gvsig.gui.View; |
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| 6 | import com.iver.mdiApp.App; |
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| 7 | import com.iver.mdiApp.AppStatus; |
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| 8 | import com.iver.mdiApp.plugins.AbstractExtension; |
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| 9 | |||
| 10 | |||
| 11 | public class ZoomPrev extends AbstractExtension { |
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| 12 | |||
| 13 | /**
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| 14 | * @see com.iver.mdiApp.plugins.Extension#isEnabled()
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| 15 | */
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| 16 | public boolean isEnabled() { |
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| 17 | View vista = (View) App.instance.getMDIContext().getActiveView(); |
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| 18 | ViewPort vp = vista.getModel().getMapContext().getViewPort(); |
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| 19 | return vp.getExtents().hasPrevious();
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| 20 | } |
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| 21 | |||
| 22 | /**
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| 23 | * @see com.iver.mdiApp.plugins.Extension#isVisible()
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| 24 | */
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| 25 | public boolean isVisible() { |
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| 26 | com.iver.mdiApp.ui.MDIManager.View f = App.instance.getMDIContext().getActiveView(); |
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| 27 | |||
| 28 | if (f == null) { |
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| 29 | return false; |
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| 30 | } |
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| 31 | |||
| 32 | if (f.getClass() == View.class) { |
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| 33 | View v = (View) f; |
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| 34 | |||
| 35 | FMap mapa = v.getModel().getMapContext(); |
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| 36 | return mapa.getLayers().getLayerCount() > 0; |
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| 37 | } else {
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| 38 | return false; |
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| 39 | } |
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| 40 | } |
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| 41 | |||
| 42 | /**
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| 43 | * @see com.iver.mdiApp.plugins.Extension#updateUI(java.lang.String)
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| 44 | */
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| 45 | public void updateUI(AppStatus status, String arg0) { |
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| 46 | View vista = (View) status.getActiveView(); |
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| 47 | ViewPort vp = vista.getModel().getMapContext().getViewPort(); |
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| 48 | vp.setExtentPrev(); |
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| 49 | } |
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| 50 | |||
| 51 | } |