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<TITLE>Determining If a Cell Is Visible in a JTable Component (Java Developers Almanac Example)
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<A HREF="../javax.swing.table/pkg.html">javax.swing.table</A><font color="#666666" class="xsmall-font">
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<B><A HREF="../javax.swing.table/pkg.html#Scrolling">Scrolling</A></B><font color="#666666" class="xsmall-font">
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<h3>e946. Determining If a Cell Is Visible in a JTable Component</h3>
<pre> // Check if the cell (1,2) is completely visible
int rowIndex = <font color="#0066ff"><i>1</i></font>;
int vColIndex = <font color="#0066ff"><i>2</i></font>;
isCellVisible(<font color="#0066ff"><i>table</i></font>, rowIndex, vColIndex);
// Assumes table is contained in a JScrollPane. Returns true iff the
// cell (rowIndex, vColIndex) is completely visible within the viewport.
public boolean isCellVisible(JTable table, int rowIndex, int vColIndex) {
if (!(table.getParent() instanceof JViewport)) {
return false;
}
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);
// Check if view completely contains cell
return new Rectangle(viewport.getExtentSize()).contains(rect);
}
</pre>
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<b>Related Examples</b></font></td>
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e945. <a class="eglink" href="Hscroll.html?l=rel">
Creating a Scrollable JTable Component
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e947. <a class="eglink" href="Vis.html?l=rel">
Making a Cell Visible in a JTable Component
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e948. <a class="eglink" href="VisCenter.html?l=rel">
Scrolling a Cell to the Center of a JTable Component
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<table width="600" CELLSPACING="0" CELLPADDING="2" BORDER="0">
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See also:
<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Cells">
Cells
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<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Column%20Heads">
Column Heads
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<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Columns">
Columns
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<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Editing">
Editing
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<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Events">
Events
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<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
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