vis.html
来自「java类库详细讲解」· HTML 代码 · 共 179 行
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<TITLE>Making a Cell Visible in a JTable Component
(Java Developers Almanac Example)
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<META CONTENT="Patrick Chan" NAME="AUTHOR">
<META CONTENT="Code Examples from The Java Developers Almanac 1.4" NAME="DESCRIPTION">
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<META CONTENT="3/20/02" NAME="revision">
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<A HREF="../index.html">List of Packages</A>
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<B><A HREF="../javax.swing.table/pkg.html">javax.swing.table</A></B><font color="#666666" SIZE="-2">
[62 examples]
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<B><A HREF="../javax.swing.table/pkg.html#Scrolling">Scrolling</A></B><font color="#666666" SIZE="-2">
[4 examples]
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<h3>
e946.
Making a Cell Visible in a JTable Component</h3>
<pre>
// Ensure that the cell (1,2) is visible
int rowIndex = <font color="#0066ff"><i>1</i></font>;
int vColIndex = <font color="#0066ff"><i>2</i></font>;
scrollToVisible(<font color="#0066ff"><i>table</i></font>, rowIndex, vColIndex);
// Assumes table is contained in a JScrollPane.
// Scrolls the cell (rowIndex, vColIndex) so that it is visible
// within the viewport.
public void scrollToVisible(JTable table, int rowIndex, int vColIndex) {
if (!(table.getParent() instanceof JViewport)) {
return;
}
JViewport viewport = (JViewport)table.getParent();
// This rectangle is relative to the table where the
// northwest corner of cell (0,0) is always (0,0).
Rectangle rect = table.getCellRect(rowIndex, vColIndex, true);
// The location of the viewport relative to the table
Point pt = viewport.getViewPosition();
// Translate the cell location so that it is relative
// to the view, assuming the northwest corner of the
// view is (0,0)
rect.setLocation(rect.x-pt.x, rect.y-pt.y);
// Scroll the area into view
viewport.scrollRectToVisible(rect);
</pre>
<P><table width="600" CELLSPACING="0" CELLPADDING="2" BORDER="0">
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<td bgcolor="#6666cc" align="center"><font color="#ffffff">
Related Examples
</font></td>
</tr>
</table>
e944. <a class="eglink" href="Hscroll.html?l=rel">
Creating a Scrollable JTable Component
</a>
<br>
e945. <a class="eglink" href="IsVis.html?l=rel">
Determining If a Cell Is Visible in a JTable Component
</a>
<br>
e947. <a class="eglink" href="VisCenter.html?l=rel">
Scrolling a Cell to the Center of a JTable Component
</a>
<br>
<table width="600" CELLSPACING="0" CELLPADDING="2" BORDER="0">
<tr>
<td align="left">
<br>
See also:
<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Cells">
Cells
</a>
<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Column%20Heads">
Column Heads
</a>
<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Columns">
Columns
</a>
<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Editing">
Editing
</a>
<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Events">
Events
</a>
<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Layout">
Layout
</a>
<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Rows">
Rows
</a>
<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Selection">
Selection
</a>
<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Sorting">
Sorting
</a>
<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Table%20Model">
Table Model
</a>
<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Tool%20Tips">
Tool Tips
</a>
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© 2002 Addison-Wesley.
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