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A Java Swing Panel that allows rotation, translation and zooming
/*
* www.javagl.de - Viewer
*
* Copyright (c) 2013-2015 Marco Hutter - http://www.javagl.de
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
package de.javagl.viewer.painters;
import java.awt.geom.AffineTransform;
import java.awt.geom.Rectangle2D;
import java.util.function.Predicate;
import de.javagl.geom.AffineTransforms;
import de.javagl.viewer.painters.LabelPainter.LabelPaintState;
/**
* General implementation of a predicate that may be assigned to a
* {@link LabelPainter#setLabelPaintingCondition(Predicate) LabelPainter}
* in order to determine whether a label should be painted. It allows
* setting the minimum and maximum valid size for the label, in world and
* in screen coordinates, respectively.
*/
public final class GeneralLabelPainterPredicate
implements Predicate
{
/**
* The minimum width that the label may have in world coordinates
*/
private double minimumWorldWidth = Double.NEGATIVE_INFINITY;
/**
* The maximum width that the label may have in world coordinates
*/
private double maximumWorldWidth = Double.POSITIVE_INFINITY;
/**
* The minimum height that the label may have in world coordinates
*/
private double minimumWorldHeight = Double.NEGATIVE_INFINITY;
/**
* The maximum height that the label may have in world coordinates
*/
private double maximumWorldHeight = Double.POSITIVE_INFINITY;
/**
* The minimum width that the label may have in screen coordinates
*/
private double minimumScreenWidth = Double.NEGATIVE_INFINITY;
/**
* The maximum width that the label may have in screen coordinates
*/
private double maximumScreenWidth = Double.POSITIVE_INFINITY;
/**
* The minimum height that the label may have in screen coordinates
*/
private double minimumScreenHeight = Double.NEGATIVE_INFINITY;
/**
* The maximum height that the label may have in screen coordinates
*/
private double maximumScreenHeight = Double.POSITIVE_INFINITY;
/**
* Default constructor.
*
* By default all limits are set to Double.NEGATIVE_INFINITY
* and Double.POSITIVE_INFINITY, respectively, causing all
* labels to be painted.
*/
public GeneralLabelPainterPredicate()
{
// Default constructor
}
/**
* Return the minimum width that the label may have, in world coordinates
*
* @return The width
*/
public double getMinimumWorldWidth()
{
return minimumWorldWidth;
}
/**
* Set the minimum width that the label may have, in world coordinates
*
* @param minimumWorldWidth The width
*/
public void setMinimumWorldWidth(double minimumWorldWidth)
{
this.minimumWorldWidth = minimumWorldWidth;
}
/**
* Return the maximum width that the label may have, in world coordinates
*
* @return The width
*/
public double getMaximumWorldWidth()
{
return maximumWorldWidth;
}
/**
* Set the maximum width that the label may have, in world coordinates
*
* @param maximumWorldWidth The width
*/
public void setMaximumWorldWidth(double maximumWorldWidth)
{
this.maximumWorldWidth = maximumWorldWidth;
}
/**
* Return the minimum height that the label may have, in world coordinates
*
* @return The width
*/
public double getMinimumWorldHeight()
{
return minimumWorldHeight;
}
/**
* Set the minimum height that the label may have, in world coordinates
*
* @param minimumWorldHeight The width
*/
public void setMinimumWorldHeight(double minimumWorldHeight)
{
this.minimumWorldHeight = minimumWorldHeight;
}
/**
* Return the maximum height that the label may have, in world coordinates
*
* @return The width
*/
public double getMaximumWorldHeight()
{
return maximumWorldHeight;
}
/**
* Set the maximum height that the label may have, in world coordinates
*
* @param maximumWorldHeight The width
*/
public void setMaximumWorldHeight(double maximumWorldHeight)
{
this.maximumWorldHeight = maximumWorldHeight;
}
/**
* Return the minimum width that the label may have, in screen coordinates
*
* @return The width
*/
public double getMinimumScreenWidth()
{
return minimumScreenWidth;
}
/**
* Set the minimum width that the label may have, in screen coordinates
*
* @param minimumScreenWidth The width
*/
public void setMinimumScreenWidth(double minimumScreenWidth)
{
this.minimumScreenWidth = minimumScreenWidth;
}
/**
* Return the maximum width that the label may have, in screen coordinates
*
* @return The width
*/
public double getMaximumScreenWidth()
{
return maximumScreenWidth;
}
/**
* Set the maximum width that the label may have, in screen coordinates
*
* @param maximumScreenWidth The width
*/
public void setMaximumScreenWidth(double maximumScreenWidth)
{
this.maximumScreenWidth = maximumScreenWidth;
}
/**
* Return the minimum height that the label may have, in screen coordinates
*
* @return The width
*/
public double getMinimumScreenHeight()
{
return minimumScreenHeight;
}
/**
* Set the minimum height that the label may have, in screen coordinates
*
* @param minimumScreenHeight The width
*/
public void setMinimumScreenHeight(double minimumScreenHeight)
{
this.minimumScreenHeight = minimumScreenHeight;
}
/**
* Return the maximum height that the label may have, in screen coordinates
*
* @return The width
*/
public double getMaximumScreenHeight()
{
return maximumScreenHeight;
}
/**
* Set the maximum height that the label may have, in screen coordinates
*
* @param maximumScreenHeight The width
*/
public void setMaximumScreenHeight(double maximumScreenHeight)
{
this.maximumScreenHeight = maximumScreenHeight;
}
@Override
public boolean test(LabelPaintState labelPaintState)
{
Rectangle2D bounds = labelPaintState.getLabelBounds();
/*
{
double worldWidth = bounds.getWidth();
double worldHeight = bounds.getHeight();
AffineTransform labelTransform =
labelPaintState.getLabelTransform();
double screenWidth =
AffineTransforms.computeDistanceX(labelTransform, worldWidth);
double screenHeight =
AffineTransforms.computeDistanceY(labelTransform, worldHeight);
System.out.println("worldWidth "+worldWidth);
System.out.println("worldHeight "+worldHeight);
System.out.println("screenWidth "+screenWidth);
System.out.println("screenHeight "+screenHeight);
}
*/
double worldWidth = bounds.getWidth();
if (worldWidth < minimumWorldWidth)
{
return false;
}
if (worldWidth > maximumWorldWidth)
{
return false;
}
double worldHeight = bounds.getHeight();
if (worldHeight < minimumWorldHeight)
{
return false;
}
if (worldHeight > maximumWorldHeight)
{
return false;
}
AffineTransform labelTransform = labelPaintState.getLabelTransform();
double screenWidth =
AffineTransforms.computeDistanceX(labelTransform, worldWidth);
if (screenWidth < minimumScreenWidth)
{
return false;
}
if (screenWidth > maximumScreenWidth)
{
return false;
}
double screenHeight =
AffineTransforms.computeDistanceY(labelTransform, worldHeight);
if (screenHeight < minimumScreenHeight)
{
return false;
}
if (screenHeight > maximumScreenHeight)
{
return false;
}
return true;
}
}