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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 2000-2005, 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> * ImageTitle.java<a name="line.28"></a><FONT color="green">029</FONT> * ---------------<a name="line.29"></a><FONT color="green">030</FONT> * (C) Copyright 2000-2005, by David Berry and Contributors;<a name="line.30"></a><FONT color="green">031</FONT> *<a name="line.31"></a><FONT color="green">032</FONT> * Original Author: David Berry;<a name="line.32"></a><FONT color="green">033</FONT> * Contributor(s): David Gilbert (for Object Refinery Limited);<a name="line.33"></a><FONT color="green">034</FONT> *<a name="line.34"></a><FONT color="green">035</FONT> * $Id: ImageTitle.java,v 1.8.2.2 2005/11/01 21:39:53 mungady Exp $<a name="line.35"></a><FONT color="green">036</FONT> *<a name="line.36"></a><FONT color="green">037</FONT> * Changes (from 18-Sep-2001)<a name="line.37"></a><FONT color="green">038</FONT> * --------------------------<a name="line.38"></a><FONT color="green">039</FONT> * 18-Sep-2001 : Added standard header (DG);<a name="line.39"></a><FONT color="green">040</FONT> * 07-Nov-2001 : Separated the JCommon Class Library classes, JFreeChart now <a name="line.40"></a><FONT color="green">041</FONT> * requires jcommon.jar (DG);<a name="line.41"></a><FONT color="green">042</FONT> * 09-Jan-2002 : Updated Javadoc comments (DG);<a name="line.42"></a><FONT color="green">043</FONT> * 07-Feb-2002 : Changed blank space around title from Insets --> Spacer, to <a name="line.43"></a><FONT color="green">044</FONT> * allow for relative or absolute spacing (DG);<a name="line.44"></a><FONT color="green">045</FONT> * 25-Jun-2002 : Updated import statements (DG);<a name="line.45"></a><FONT color="green">046</FONT> * 23-Sep-2002 : Fixed errors reported by Checkstyle (DG);<a name="line.46"></a><FONT color="green">047</FONT> * 26-Nov-2002 : Added method for drawing images at left or right (DG);<a name="line.47"></a><FONT color="green">048</FONT> * 22-Sep-2003 : Added checks that the Image can never be null (TM).<a name="line.48"></a><FONT color="green">049</FONT> * 11-Jan-2005 : Removed deprecated code in preparation for the 1.0.0 <a name="line.49"></a><FONT color="green">050</FONT> * release (DG); <a name="line.50"></a><FONT color="green">051</FONT> * 02-Feb-2005 : Changed padding mechanism for all titles (DG);<a name="line.51"></a><FONT color="green">052</FONT> * 20-Apr-2005 : Added new draw() method (DG); <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> <a name="line.55"></a><FONT color="green">056</FONT> package org.jfree.chart.title;<a name="line.56"></a><FONT color="green">057</FONT> <a name="line.57"></a><FONT color="green">058</FONT> import java.awt.Graphics2D;<a name="line.58"></a><FONT color="green">059</FONT> import java.awt.Image;<a name="line.59"></a><FONT color="green">060</FONT> import java.awt.geom.Rectangle2D;<a name="line.60"></a><FONT color="green">061</FONT> <a name="line.61"></a><FONT color="green">062</FONT> import org.jfree.chart.event.TitleChangeEvent;<a name="line.62"></a><FONT color="green">063</FONT> import org.jfree.ui.HorizontalAlignment;<a name="line.63"></a><FONT color="green">064</FONT> import org.jfree.ui.RectangleEdge;<a name="line.64"></a><FONT color="green">065</FONT> import org.jfree.ui.RectangleInsets;<a name="line.65"></a><FONT color="green">066</FONT> import org.jfree.ui.Size2D;<a name="line.66"></a><FONT color="green">067</FONT> import org.jfree.ui.VerticalAlignment;<a name="line.67"></a><FONT color="green">068</FONT> <a name="line.68"></a><FONT color="green">069</FONT> /**<a name="line.69"></a><FONT color="green">070</FONT> * A chart title that displays an image. This is useful, for example, if you<a name="line.70"></a><FONT color="green">071</FONT> * have an image of your corporate logo and want to use as a footnote or part<a name="line.71"></a><FONT color="green">072</FONT> * of a title in a chart you create.<a name="line.72"></a><FONT color="green">073</FONT> * <P><a name="line.73"></a><FONT color="green">074</FONT> * ImageTitle needs an image passed to it in the constructor. For ImageTitle<a name="line.74"></a><FONT color="green">075</FONT> * to work, you must have already loaded this image from its source (disk or<a name="line.75"></a><FONT color="green">076</FONT> * URL). It is recomended you use something like<a name="line.76"></a><FONT color="green">077</FONT> * Toolkit.getDefaultToolkit().getImage() to get the image. Then, use<a name="line.77"></a><FONT color="green">078</FONT> * MediaTracker or some other message to make sure the image is fully loaded<a name="line.78"></a><FONT color="green">079</FONT> * from disk.<a name="line.79"></a><FONT color="green">080</FONT> *<a name="line.80"></a><FONT color="green">081</FONT> * @author David Berry<a name="line.81"></a><FONT color="green">082</FONT> */<a name="line.82"></a><FONT color="green">083</FONT> public class ImageTitle extends Title {<a name="line.83"></a><FONT color="green">084</FONT> <a name="line.84"></a><FONT color="green">085</FONT> /** The title image. */<a name="line.85"></a><FONT color="green">086</FONT> private Image image;<a name="line.86"></a><FONT color="green">087</FONT> <a name="line.87"></a><FONT color="green">088</FONT> /**<a name="line.88"></a><FONT color="green">089</FONT> * Creates a new image title.<a name="line.89"></a><FONT color="green">090</FONT> *<a name="line.90"></a><FONT color="green">091</FONT> * @param image the image (<code>null</code> not permitted).<a name="line.91"></a><FONT color="green">092</FONT> */<a name="line.92"></a><FONT color="green">093</FONT> public ImageTitle(Image image) {<a name="line.93"></a><FONT color="green">094</FONT> this(image, image.getHeight(null), image.getWidth(null), <a name="line.94"></a><FONT color="green">095</FONT> Title.DEFAULT_POSITION, Title.DEFAULT_HORIZONTAL_ALIGNMENT,<a name="line.95"></a><FONT color="green">096</FONT> Title.DEFAULT_VERTICAL_ALIGNMENT, Title.DEFAULT_PADDING);<a name="line.96"></a><FONT color="green">097</FONT> }<a name="line.97"></a><FONT color="green">098</FONT> <a name="line.98"></a><FONT color="green">099</FONT> /**<a name="line.99"></a><FONT color="green">100</FONT> * Creates a new image title.<a name="line.100"></a><FONT color="green">101</FONT> *<a name="line.101"></a><FONT color="green">102</FONT> * @param image the image (<code>null</code> not permitted).<a name="line.102"></a><FONT color="green">103</FONT> * @param position the title position.<a name="line.103"></a><FONT color="green">104</FONT> * @param horizontalAlignment the horizontal alignment.<a name="line.104"></a><FONT color="green">105</FONT> * @param verticalAlignment the vertical alignment.<a name="line.105"></a><FONT color="green">106</FONT> */<a name="line.106"></a><FONT color="green">107</FONT> public ImageTitle(Image image, RectangleEdge position, <a name="line.107"></a><FONT color="green">108</FONT> HorizontalAlignment horizontalAlignment, <a name="line.108"></a><FONT color="green">109</FONT> VerticalAlignment verticalAlignment) {<a name="line.109"></a><FONT color="green">110</FONT> <a name="line.110"></a><FONT color="green">111</FONT> this(image, image.getHeight(null), image.getWidth(null),<a name="line.111"></a><FONT color="green">112</FONT> position, horizontalAlignment, verticalAlignment, <a name="line.112"></a><FONT color="green">113</FONT> Title.DEFAULT_PADDING);<a name="line.113"></a><FONT color="green">114</FONT> }<a name="line.114"></a><FONT color="green">115</FONT> <a name="line.115"></a><FONT color="green">116</FONT> /**<a name="line.116"></a><FONT color="green">117</FONT> * Creates a new image title with the given image scaled to the given<a name="line.117"></a><FONT color="green">118</FONT> * width and height in the given location.<a name="line.118"></a><FONT color="green">119</FONT> *<a name="line.119"></a><FONT color="green">120</FONT> * @param image the image (<code>null</code> not permitted).<a name="line.120"></a><FONT color="green">121</FONT> * @param height the height used to draw the image.<a name="line.121"></a><FONT color="green">122</FONT> * @param width the width used to draw the image.<a name="line.122"></a><FONT color="green">123</FONT> * @param position the title position.<a name="line.123"></a><FONT color="green">124</FONT> * @param horizontalAlignment the horizontal alignment.<a name="line.124"></a><FONT color="green">125</FONT> * @param verticalAlignment the vertical alignment.<a name="line.125"></a><FONT color="green">126</FONT> * @param padding the amount of space to leave around the outside of the <a name="line.126"></a><FONT color="green">127</FONT> * title.<a name="line.127"></a><FONT color="green">128</FONT> */<a name="line.128"></a><FONT color="green">129</FONT> public ImageTitle(Image image, int height, int width, <a name="line.129"></a><FONT color="green">130</FONT> RectangleEdge position,<a name="line.130"></a><FONT color="green">131</FONT> HorizontalAlignment horizontalAlignment, <a name="line.131"></a><FONT color="green">132</FONT> VerticalAlignment verticalAlignment,<a name="line.132"></a><FONT color="green">133</FONT> RectangleInsets padding) {<a name="line.133"></a><FONT color="green">134</FONT> <a name="line.134"></a><FONT color="green">135</FONT> super(position, horizontalAlignment, verticalAlignment, padding);<a name="line.135"></a><FONT color="green">136</FONT> if (image == null) {<a name="line.136"></a><FONT color="green">137</FONT> throw new NullPointerException("Null 'image' argument.");<a name="line.137"></a><FONT color="green">138</FONT> }<a name="line.138"></a><FONT color="green">139</FONT> this.image = image;<a name="line.139"></a><FONT color="green">140</FONT> setHeight(height);<a name="line.140"></a><FONT color="green">141</FONT> setWidth(width);<a name="line.141"></a><FONT color="green">142</FONT> <a name="line.142"></a><FONT color="green">143</FONT> }<a name="line.143"></a><FONT color="green">144</FONT> <a name="line.144"></a><FONT color="green">145</FONT> /**<a name="line.145"></a><FONT color="green">146</FONT> * Returns the image for the title.<a name="line.146"></a><FONT color="green">147</FONT> *<a name="line.147"></a><FONT color="green">148</FONT> * @return The image for the title (never <code>null</code>).<a name="line.148"></a><FONT color="green">149</FONT> */<a name="line.149"></a><FONT color="green">150</FONT> public Image getImage() {<a name="line.150"></a><FONT color="green">151</FONT> return this.image;<a name="line.151"></a><FONT color="green">152</FONT> }<a name="line.152"></a><FONT color="green">153</FONT> <a name="line.153"></a><FONT color="green">154</FONT> /**<a name="line.154"></a><FONT color="green">155</FONT> * Sets the image for the title and notifies registered listeners that the<a name="line.155"></a><FONT color="green">156</FONT> * title has been modified.<a name="line.156"></a><FONT color="green">157</FONT> *<a name="line.157"></a><FONT color="green">158</FONT> * @param image the new image (<code>null</code> not permitted).<a name="line.158"></a><FONT color="green">159</FONT> */<a name="line.159"></a><FONT color="green">160</FONT> public void setImage(Image image) {<a name="line.160"></a><FONT color="green">161</FONT> if (image == null) {<a name="line.161"></a><FONT color="green">162</FONT> throw new NullPointerException("Null 'image' argument.");<a name="line.162"></a><FONT color="green">163</FONT> }<a name="line.163"></a><FONT color="green">164</FONT> this.image = image;<a name="line.164"></a><FONT color="green">165</FONT> notifyListeners(new TitleChangeEvent(this));<a name="line.165"></a><FONT color="green">166</FONT> }<a name="line.166"></a><FONT color="green">167</FONT> <a name="line.167"></a><FONT color="green">168</FONT> /**<a name="line.168"></a><FONT color="green">169</FONT> * Draws the title on a Java 2D graphics device (such as the screen or a <a name="line.169"></a><FONT color="green">170</FONT> * printer).<a name="line.170"></a><FONT color="green">171</FONT> *<a name="line.171"></a><FONT color="green">172</FONT> * @param g2 the graphics device.<a name="line.172"></a><FONT color="green">173</FONT> * @param titleArea the area within which the title (and plot) should be <a name="line.173"></a><FONT color="green">174</FONT> * drawn.<a name="line.174"></a><FONT color="green">175</FONT> */<a name="line.175"></a><FONT color="green">176</FONT> public void draw(Graphics2D g2, Rectangle2D titleArea) {<a name="line.176"></a><FONT color="green">177</FONT> <a name="line.177"></a><FONT color="green">178</FONT> RectangleEdge position = getPosition();<a name="line.178"></a><FONT color="green">179</FONT> if (position == RectangleEdge.TOP || position == RectangleEdge.BOTTOM) {<a name="line.179"></a><FONT color="green">180</FONT> drawHorizontal(g2, titleArea);<a name="line.180"></a><FONT color="green">181</FONT> }<a name="line.181"></a><FONT color="green">182</FONT> else if (position == RectangleEdge.LEFT <a name="line.182"></a><FONT color="green">183</FONT> || position == RectangleEdge.RIGHT) {<a name="line.183"></a><FONT color="green">184</FONT> drawVertical(g2, titleArea);<a name="line.184"></a><FONT color="green">185</FONT> }<a name="line.185"></a><FONT color="green">186</FONT> else {<a name="line.186"></a><FONT color="green">187</FONT> throw new RuntimeException("Invalid title position.");<a name="line.187"></a><FONT color="green">188</FONT> }<a name="line.188"></a><FONT color="green">189</FONT> }<a name="line.189"></a>⌨️ 快捷键说明
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