com.panayotis.gnuplot.layout.AutoGraphLayout Maven / Gradle / Ivy
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/* Copyright (c) 2007-2014 by panayotis.com
*
* JavaPlot is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, version 2.
*
* JavaPlot is free in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with CrossMobile; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.panayotis.gnuplot.layout;
import com.panayotis.gnuplot.plot.Page;
import java.io.Serializable;
/**
* Align graphs evenly on the page, in a grid layout, based on
*
* If you manually set metrics and use this, these metrics will be lost
*
* @author teras
*/
public class AutoGraphLayout implements GraphLayout, Serializable {
/**
* Orientation of the graph layout
*/
public static final boolean DOWNWARDS = true, UPWARDS = false;
/**
* Draw rows or columns first
*/
public static final boolean ROWSFIRST = true, COLUMNSFIRST = false;
private boolean orientation;
private boolean drawfirst;
private int rows, cols;
/**
* Create a new automatic grid layout. Default values are ROWSFIRST,
* DOWNWARDS, automatic layout of components
*/
public AutoGraphLayout() {
drawfirst = ROWSFIRST;
orientation = DOWNWARDS;
rows = -1;
cols = -1;
}
/**
* Set where the first graph will be put
*
* @param drawfirst Position of the first graph
* @see #ROWSFIRST
* @see #COLUMNSFIRST
*/
public void setDrawFirst(boolean drawfirst) {
this.drawfirst = drawfirst;
}
/**
* Sey the orientation of the graphs, as being put
*
* @param orientation Selected orientation
* @see #DOWNWARDS
* @see #UPWARDS
*/
public void setOrientation(boolean orientation) {
this.orientation = orientation;
}
/**
* Manually set the number of rows. This method overrides the automatic
* component layout.
*
* @param rows Desired number of rows. Set it to -1 to be automatically
* computed.
*/
public void setRows(int rows) {
this.rows = rows;
}
/**
* Manually set the number of columns. This method overrides the automatic
* component layout.
*
* @param cols Desired number of columns. Set it to -1 to be automatically
* computed.
*/
public void setColumns(int cols) {
this.cols = cols;
}
private int getOtherDimension(int size, int dim) {
return (int) Math.ceil((double) size / dim);
}
/**
* Update the capacity of this layout. This manager creates a grid, as much
* square as possible, if automatic layout is wanted.
*
* @param page The page with the elements we would like to position
* @param buffer Where to send commands, just after the "set multiplot"
* part.
*/
public void setDefinition(Page page, StringBuilder buffer) {
int size = page.size();
if (size <= 0)
return;
int drawcols = cols, drawrows = rows;
if (cols > 0 && rows > 0) {
drawcols = cols;
drawrows = rows;
} else if (cols > 0) {
drawcols = cols;
drawrows = getOtherDimension(size, drawcols);
} else if (rows > 0) {
drawrows = rows;
drawcols = getOtherDimension(size, drawrows);
} else {
drawrows = (int) (Math.floor(Math.sqrt(size)));
drawcols = getOtherDimension(size, drawrows);
}
buffer.append(" layout ");
buffer.append(drawrows).append(',').append(drawcols);
if (drawfirst == ROWSFIRST)
buffer.append(" rowsfirst");
else
buffer.append(" columnsfirst");
if (orientation == DOWNWARDS)
buffer.append(" downwards");
else
buffer.append(" upwards");
}
}