Package com.cburch.logisim.gui.generic

Source Code of com.cburch.logisim.gui.generic.BasicZoomModel

/* Copyright (c) 2010, Carl Burch. License information is located in the
* com.cburch.logisim.Main source code and at www.cburch.com/logisim/. */

package com.cburch.logisim.gui.generic;

import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;

import com.cburch.logisim.gui.generic.ZoomModel;
import com.cburch.logisim.prefs.PrefMonitor;

public class BasicZoomModel implements ZoomModel {
  private double[] zoomOptions;
 
  private PropertyChangeSupport support;
  private double zoomFactor;
  private boolean showGrid;
 
  public BasicZoomModel(PrefMonitor<Boolean> gridPref,
      PrefMonitor<Double> zoomPref, double[] zoomOpts) {
    zoomOptions = zoomOpts;
    support = new PropertyChangeSupport(this);
    zoomFactor = 1.0;
    showGrid = true;

    setZoomFactor(zoomPref.get().doubleValue());
    setShowGrid(gridPref.getBoolean());
  }

  public void addPropertyChangeListener(String prop, PropertyChangeListener l) {
    support.addPropertyChangeListener(prop, l);
  }

  public void removePropertyChangeListener(String prop,
      PropertyChangeListener l) {
    support.removePropertyChangeListener(prop, l);
  }

  public boolean getShowGrid() {
    return showGrid;
  }

  public double getZoomFactor() {
    return zoomFactor;
  }

  public double[] getZoomOptions() {
    return zoomOptions;
  }

  public void setShowGrid(boolean value) {
    if (value != showGrid) {
      showGrid = value;
      support.firePropertyChange(ZoomModel.SHOW_GRID, !value, value);
    }
  }

  public void setZoomFactor(double value) {
    double oldValue = zoomFactor;
    if (value != oldValue) {
      zoomFactor = value;
      support.firePropertyChange(ZoomModel.ZOOM, Double.valueOf(oldValue),
          Double.valueOf(value));
    }
  }
}
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