学步园

/*<br /> GBC - A convenience class to tame the GridBagLayout</p> <p>Copyright (C) 2002 Cay S. Horstmann (http://horstmann.com)</p> <p>This program is free software; you can redistribute it and/or modify<br /> it under the terms of the GNU General Public License as published by<br /> the Free Software Foundation; either version 2 of the License, or<br /> (at your option) any later version.</p> <p>This program is distributed in the hope that it will be useful,<br /> but WITHOUT ANY WARRANTY; without even the implied warranty of<br /> MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the<br /> GNU General Public License for more details.</p> <p>You should have received a copy of the GNU General Public License<br /> along with this program; if not, write to the Free Software<br /> Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA<br /> */</p> <p>import java.awt.*;</p> <p>/**<br /> This class simplifies the use of the GridBagConstraints<br /> class.<br /> */<br /> public class GBC extends GridBagConstraints<br /> {<br /> /**<br /> Constructs a GBC with a given gridx and gridy position and<br /> all other grid bag constraint values set to the default.<br /> @param gridx the gridx position<br /> @param gridy the gridy position<br /> */<br /> public GBC(int gridx, int gridy)<br /> {<br /> this.gridx = gridx;<br /> this.gridy = gridy;<br /> }</p> <p> /**<br /> Sets the cell spans.<br /> @param gridwidth the cell span in x-direction<br /> @param gridheight the cell span in y-direction<br /> @return this object for further modification<br /> */<br /> public GBC setSpan(int gridwidth, int gridheight)<br /> {<br /> this.gridwidth = gridwidth;<br /> this.gridheight = gridheight;<br /> return this;<br /> }</p> <p> /**<br /> Sets the anchor.<br /> @param anchor the anchor value<br /> @return this object for further modification<br /> */<br /> public GBC setAnchor(int anchor)<br /> {<br /> this.anchor = anchor;<br /> return this;<br /> }</p> <p> /**<br /> Sets the fill direction.<br /> @param fill the fill direction<br /> @return this object for further modification<br /> */<br /> public GBC setFill(int fill)<br /> {<br /> this.fill = fill;<br /> return this;<br /> }</p> <p> /**<br /> Sets the cell weights.<br /> @param weightx the cell weight in x-direction<br /> @param weighty the cell weight in y-direction<br /> @return this object for further modification<br /> */<br /> public GBC setWeight(double weightx, double weighty)<br /> {<br /> this.weightx = weightx;<br /> this.weighty = weighty;<br /> return this;<br /> }</p> <p> /**<br /> Sets the insets of this cell.<br /> @param distance the spacing to use in all directions<br /> @return this object for further modification<br /> */<br /> public GBC setInsets(int distance)<br /> {<br /> this.insets = new java.awt.Insets(<br /> distance, distance, distance, distance);<br /> return this;<br /> }</p> <p> /**<br /> Sets the insets of this cell.<br /> @param top the spacing to use on top<br /> @param left the spacing to use to the left<br /> @param bottom the spacing to use on the bottom<br /> @param right the spacing to use to the right<br /> @return this object for further modification<br /> */<br /> public GBC setInsets(int top, int left, int bottom, int right)<br /> {<br /> this.insets = new java.awt.Insets(<br /> top, left, bottom, right);<br /> return this;<br /> }</p> <p> /**<br /> Sets the internal padding<br /> @param ipadx the internal padding in x-direction<br /> @param ipady the internal padding in y-direction<br /> @return this object for further modification<br /> */<br /> public GBC setIpad(int ipadx, int ipady)<br /> {<br /> this.ipadx = ipadx;<br /> this.ipady = ipady;<br /> return this;<br /> }<br /> }</p> <p>

引自java2核心技术 因为编写GridBagLayout的约束代码很麻烦，而这个类能够简化。