📄 centerarrangement.html
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<HTML><BODY BGCOLOR="white"><PRE><FONT color="green">001</FONT> /* ===========================================================<a name="line.1"></a><FONT color="green">002</FONT> * JFreeChart : a free chart library for the Java(tm) platform<a name="line.2"></a><FONT color="green">003</FONT> * ===========================================================<a name="line.3"></a><FONT color="green">004</FONT> *<a name="line.4"></a><FONT color="green">005</FONT> * (C) Copyright 2000-2006, by Object Refinery Limited and Contributors.<a name="line.5"></a><FONT color="green">006</FONT> *<a name="line.6"></a><FONT color="green">007</FONT> * Project Info: http://www.jfree.org/jfreechart/index.html<a name="line.7"></a><FONT color="green">008</FONT> *<a name="line.8"></a><FONT color="green">009</FONT> * This library is free software; you can redistribute it and/or modify it <a name="line.9"></a><FONT color="green">010</FONT> * under the terms of the GNU Lesser General Public License as published by <a name="line.10"></a><FONT color="green">011</FONT> * the Free Software Foundation; either version 2.1 of the License, or <a name="line.11"></a><FONT color="green">012</FONT> * (at your option) any later version.<a name="line.12"></a><FONT color="green">013</FONT> *<a name="line.13"></a><FONT color="green">014</FONT> * This library is distributed in the hope that it will be useful, but <a name="line.14"></a><FONT color="green">015</FONT> * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY <a name="line.15"></a><FONT color="green">016</FONT> * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public <a name="line.16"></a><FONT color="green">017</FONT> * License for more details.<a name="line.17"></a><FONT color="green">018</FONT> *<a name="line.18"></a><FONT color="green">019</FONT> * You should have received a copy of the GNU Lesser General Public<a name="line.19"></a><FONT color="green">020</FONT> * License along with this library; if not, write to the Free Software<a name="line.20"></a><FONT color="green">021</FONT> * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, <a name="line.21"></a><FONT color="green">022</FONT> * USA. <a name="line.22"></a><FONT color="green">023</FONT> *<a name="line.23"></a><FONT color="green">024</FONT> * [Java is a trademark or registered trademark of Sun Microsystems, Inc. <a name="line.24"></a><FONT color="green">025</FONT> * in the United States and other countries.]<a name="line.25"></a><FONT color="green">026</FONT> *<a name="line.26"></a><FONT color="green">027</FONT> * ----------------------<a name="line.27"></a><FONT color="green">028</FONT> * CenterArrangement.java<a name="line.28"></a><FONT color="green">029</FONT> * ----------------------<a name="line.29"></a><FONT color="green">030</FONT> * (C) Copyright 2005, 2006, by Object Refinery Limited.<a name="line.30"></a><FONT color="green">031</FONT> *<a name="line.31"></a><FONT color="green">032</FONT> * Original Author: David Gilbert (for Object Refinery Limited);<a name="line.32"></a><FONT color="green">033</FONT> * Contributor(s): -;<a name="line.33"></a><FONT color="green">034</FONT> *<a name="line.34"></a><FONT color="green">035</FONT> * $Id: CenterArrangement.java,v 1.3.2.2 2006/07/20 16:21:58 mungady Exp $<a name="line.35"></a><FONT color="green">036</FONT> *<a name="line.36"></a><FONT color="green">037</FONT> * Changes:<a name="line.37"></a><FONT color="green">038</FONT> * --------<a name="line.38"></a><FONT color="green">039</FONT> * 08-Mar-2005 : Version 1 (DG);<a name="line.39"></a><FONT color="green">040</FONT> * ------------- JFREECHART 1.0.0 ---------------------------------------------<a name="line.40"></a><FONT color="green">041</FONT> * 20-Jul-2006 : Set bounds of contained block when arranging (DG);<a name="line.41"></a><FONT color="green">042</FONT> * <a name="line.42"></a><FONT color="green">043</FONT> */<a name="line.43"></a><FONT color="green">044</FONT> <a name="line.44"></a><FONT color="green">045</FONT> package org.jfree.chart.block;<a name="line.45"></a><FONT color="green">046</FONT> <a name="line.46"></a><FONT color="green">047</FONT> import java.awt.Graphics2D;<a name="line.47"></a><FONT color="green">048</FONT> import java.awt.geom.Rectangle2D;<a name="line.48"></a><FONT color="green">049</FONT> import java.io.Serializable;<a name="line.49"></a><FONT color="green">050</FONT> import java.util.List;<a name="line.50"></a><FONT color="green">051</FONT> <a name="line.51"></a><FONT color="green">052</FONT> import org.jfree.ui.Size2D;<a name="line.52"></a><FONT color="green">053</FONT> <a name="line.53"></a><FONT color="green">054</FONT> /**<a name="line.54"></a><FONT color="green">055</FONT> * Arranges a block in the center of its container. This class is immutable.<a name="line.55"></a><FONT color="green">056</FONT> */<a name="line.56"></a><FONT color="green">057</FONT> public class CenterArrangement implements Arrangement, Serializable {<a name="line.57"></a><FONT color="green">058</FONT> <a name="line.58"></a><FONT color="green">059</FONT> /** For serialization. */<a name="line.59"></a><FONT color="green">060</FONT> private static final long serialVersionUID = -353308149220382047L; <a name="line.60"></a><FONT color="green">061</FONT> <a name="line.61"></a><FONT color="green">062</FONT> /**<a name="line.62"></a><FONT color="green">063</FONT> * Creates a new instance.<a name="line.63"></a><FONT color="green">064</FONT> */<a name="line.64"></a><FONT color="green">065</FONT> public CenterArrangement() { <a name="line.65"></a><FONT color="green">066</FONT> }<a name="line.66"></a><FONT color="green">067</FONT> <a name="line.67"></a><FONT color="green">068</FONT> /**<a name="line.68"></a><FONT color="green">069</FONT> * Adds a block to be managed by this instance. This method is usually <a name="line.69"></a><FONT color="green">070</FONT> * called by the {@link BlockContainer}, you shouldn't need to call it <a name="line.70"></a><FONT color="green">071</FONT> * directly.<a name="line.71"></a><FONT color="green">072</FONT> * <a name="line.72"></a><FONT color="green">073</FONT> * @param block the block.<a name="line.73"></a><FONT color="green">074</FONT> * @param key a key that controls the position of the block.<a name="line.74"></a><FONT color="green">075</FONT> */<a name="line.75"></a><FONT color="green">076</FONT> public void add(Block block, Object key) {<a name="line.76"></a><FONT color="green">077</FONT> // since the flow layout is relatively straightforward, <a name="line.77"></a><FONT color="green">078</FONT> // no information needs to be recorded here<a name="line.78"></a><FONT color="green">079</FONT> }<a name="line.79"></a><FONT color="green">080</FONT> <a name="line.80"></a><FONT color="green">081</FONT> /**<a name="line.81"></a><FONT color="green">082</FONT> * Calculates and sets the bounds of all the items in the specified <a name="line.82"></a><FONT color="green">083</FONT> * container, subject to the given constraint. The <code>Graphics2D</code><a name="line.83"></a><FONT color="green">084</FONT> * can be used by some items (particularly items containing text) to <a name="line.84"></a><FONT color="green">085</FONT> * calculate sizing parameters.<a name="line.85"></a><FONT color="green">086</FONT> * <a name="line.86"></a><FONT color="green">087</FONT> * @param container the container whose items are being arranged.<a name="line.87"></a><FONT color="green">088</FONT> * @param g2 the graphics device.<a name="line.88"></a><FONT color="green">089</FONT> * @param constraint the size constraint.<a name="line.89"></a><FONT color="green">090</FONT> * <a name="line.90"></a><FONT color="green">091</FONT> * @return The size of the container after arrangement of the contents.<a name="line.91"></a><FONT color="green">092</FONT> */<a name="line.92"></a><FONT color="green">093</FONT> public Size2D arrange(BlockContainer container, Graphics2D g2,<a name="line.93"></a><FONT color="green">094</FONT> RectangleConstraint constraint) {<a name="line.94"></a><FONT color="green">095</FONT> <a name="line.95"></a><FONT color="green">096</FONT> LengthConstraintType w = constraint.getWidthConstraintType();<a name="line.96"></a><FONT color="green">097</FONT> LengthConstraintType h = constraint.getHeightConstraintType();<a name="line.97"></a><FONT color="green">098</FONT> if (w == LengthConstraintType.NONE) {<a name="line.98"></a><FONT color="green">099</FONT> if (h == LengthConstraintType.NONE) {<a name="line.99"></a><FONT color="green">100</FONT> return arrangeNN(container, g2); <a name="line.100"></a><FONT color="green">101</FONT> }<a name="line.101"></a><FONT color="green">102</FONT> else if (h == LengthConstraintType.FIXED) {<a name="line.102"></a><FONT color="green">103</FONT> throw new RuntimeException("Not implemented."); <a name="line.103"></a><FONT color="green">104</FONT> }<a name="line.104"></a><FONT color="green">105</FONT> else if (h == LengthConstraintType.RANGE) {<a name="line.105"></a><FONT color="green">106</FONT> throw new RuntimeException("Not implemented."); <a name="line.106"></a><FONT color="green">107</FONT> }<a name="line.107"></a><FONT color="green">108</FONT> }<a name="line.108"></a><FONT color="green">109</FONT> else if (w == LengthConstraintType.FIXED) {<a name="line.109"></a><FONT color="green">110</FONT> if (h == LengthConstraintType.NONE) {<a name="line.110"></a><FONT color="green">111</FONT> return arrangeFN(container, g2, constraint); <a name="line.111"></a><FONT color="green">112</FONT> }<a name="line.112"></a><FONT color="green">113</FONT> else if (h == LengthConstraintType.FIXED) {<a name="line.113"></a><FONT color="green">114</FONT> throw new RuntimeException("Not implemented."); <a name="line.114"></a><FONT color="green">115</FONT> }<a name="line.115"></a><FONT color="green">116</FONT> else if (h == LengthConstraintType.RANGE) {<a name="line.116"></a><FONT color="green">117</FONT> throw new RuntimeException("Not implemented."); <a name="line.117"></a><FONT color="green">118</FONT> }<a name="line.118"></a><FONT color="green">119</FONT> }<a name="line.119"></a><FONT color="green">120</FONT> else if (w == LengthConstraintType.RANGE) {<a name="line.120"></a><FONT color="green">121</FONT> if (h == LengthConstraintType.NONE) {<a name="line.121"></a><FONT color="green">122</FONT> return arrangeRN(container, g2, constraint); <a name="line.122"></a><FONT color="green">123</FONT> }<a name="line.123"></a><FONT color="green">124</FONT> else if (h == LengthConstraintType.FIXED) {<a name="line.124"></a><FONT color="green">125</FONT> return arrangeRF(container, g2, constraint); <a name="line.125"></a><FONT color="green">126</FONT> }<a name="line.126"></a><FONT color="green">127</FONT> else if (h == LengthConstraintType.RANGE) {<a name="line.127"></a><FONT color="green">128</FONT> return arrangeRR(container, g2, constraint); <a name="line.128"></a><FONT color="green">129</FONT> }<a name="line.129"></a><FONT color="green">130</FONT> }<a name="line.130"></a><FONT color="green">131</FONT> throw new IllegalArgumentException("Unknown LengthConstraintType.");<a name="line.131"></a><FONT color="green">132</FONT> <a name="line.132"></a><FONT color="green">133</FONT> }<a name="line.133"></a><FONT color="green">134</FONT> <a name="line.134"></a><FONT color="green">135</FONT> /**<a name="line.135"></a><FONT color="green">136</FONT> * Arranges the blocks in the container with a fixed width and no height <a name="line.136"></a><FONT color="green">137</FONT> * constraint.<a name="line.137"></a><FONT color="green">138</FONT> * <a name="line.138"></a><FONT color="green">139</FONT> * @param container the container.<a name="line.139"></a><FONT color="green">140</FONT> * @param g2 the graphics device.<a name="line.140"></a><FONT color="green">141</FONT> * @param constraint the constraint.<a name="line.141"></a><FONT color="green">142</FONT> * <a name="line.142"></a><FONT color="green">143</FONT> * @return The size.<a name="line.143"></a><FONT color="green">144</FONT> */<a name="line.144"></a><FONT color="green">145</FONT> protected Size2D arrangeFN(BlockContainer container, Graphics2D g2,<a name="line.145"></a><FONT color="green">146</FONT> RectangleConstraint constraint) {<a name="line.146"></a><FONT color="green">147</FONT> <a name="line.147"></a><FONT color="green">148</FONT> List blocks = container.getBlocks();<a name="line.148"></a><FONT color="green">149</FONT> Block b = (Block) blocks.get(0);<a name="line.149"></a><FONT color="green">150</FONT> Size2D s = b.arrange(g2, RectangleConstraint.NONE);<a name="line.150"></a><FONT color="green">151</FONT> double width = constraint.getWidth();<a name="line.151"></a><FONT color="green">152</FONT> Rectangle2D bounds = new Rectangle2D.Double((width - s.width) / 2.0, <a name="line.152"></a><FONT color="green">153</FONT> 0.0, s.width, s.height);<a name="line.153"></a><FONT color="green">154</FONT> b.setBounds(bounds);<a name="line.154"></a><FONT color="green">155</FONT> return new Size2D((width - s.width) / 2.0, s.height); <a name="line.155"></a><FONT color="green">156</FONT> }<a name="line.156"></a><FONT color="green">157</FONT> <a name="line.157"></a><FONT color="green">158</FONT> /**<a name="line.158"></a><FONT color="green">159</FONT> * Arranges the blocks in the container with a fixed with and a range<a name="line.159"></a><FONT color="green">160</FONT> * constraint on the height.<a name="line.160"></a><FONT color="green">161</FONT> * <a name="line.161"></a><FONT color="green">162</FONT> * @param container the container.<a name="line.162"></a><FONT color="green">163</FONT> * @param g2 the graphics device.<a name="line.163"></a><FONT color="green">164</FONT> * @param constraint the constraint.<a name="line.164"></a><FONT color="green">165</FONT> * <a name="line.165"></a><FONT color="green">166</FONT> * @return The size following the arrangement.<a name="line.166"></a><FONT color="green">167</FONT> */<a name="line.167"></a><FONT color="green">168</FONT> protected Size2D arrangeFR(BlockContainer container, Graphics2D g2,<a name="line.168"></a><FONT color="green">169</FONT> RectangleConstraint constraint) {<a name="line.169"></a><FONT color="green">170</FONT> <a name="line.170"></a><FONT color="green">171</FONT> Size2D s = arrangeFN(container, g2, constraint);<a name="line.171"></a><FONT color="green">172</FONT> if (constraint.getHeightRange().contains(s.height)) {<a name="line.172"></a><FONT color="green">173</FONT> return s; <a name="line.173"></a><FONT color="green">174</FONT> }<a name="line.174"></a><FONT color="green">175</FONT> else {<a name="line.175"></a><FONT color="green">176</FONT> RectangleConstraint c = constraint.toFixedHeight(<a name="line.176"></a><FONT color="green">177</FONT> constraint.getHeightRange().constrain(s.getHeight()));<a name="line.177"></a><FONT color="green">178</FONT> return arrangeFF(container, g2, c);<a name="line.178"></a><FONT color="green">179</FONT> }<a name="line.179"></a><FONT color="green">180</FONT> }<a name="line.180"></a><FONT color="green">181</FONT> <a name="line.181"></a><FONT color="green">182</FONT> /**<a name="line.182"></a><FONT color="green">183</FONT> * Arranges the blocks in the container with the overall height and width<a name="line.183"></a><FONT color="green">184</FONT> * specified as fixed constraints.<a name="line.184"></a><FONT color="green">185</FONT> * <a name="line.185"></a><FONT color="green">186</FONT> * @param container the container.<a name="line.186"></a><FONT color="green">187</FONT> * @param g2 the graphics device.<a name="line.187"></a><FONT color="green">188</FONT> * @param constraint the constraint.<a name="line.188"></a><FONT color="green">189</FONT> * <a name="line.189"></a><FONT color="green">190</FONT> * @return The size following the arrangement.<a name="line.190"></a><FONT color="green">191</FONT> */<a name="line.191"></a><FONT color="green">192</FONT> protected Size2D arrangeFF(BlockContainer container, Graphics2D g2,<a name="line.192"></a><FONT color="green">193</FONT> RectangleConstraint constraint) {<a name="line.193"></a><FONT color="green">194</FONT> <a name="line.194"></a><FONT color="green">195</FONT> // TODO: implement this properly<a name="line.195"></a><FONT color="green">196</FONT> return arrangeFN(container, g2, constraint);<a name="line.196"></a>⌨️ 快捷键说明
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