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<TITLE>Getting the Number of Rows and Columns of Cells in a GridBagLayout
(Java Developers Almanac Example)
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<h3>
e628.
Getting the Number of Rows and Columns of Cells in a GridBagLayout</h3>
The number of rows and columns in a <code>GridBagLayout</code> automatically
grows as needed when components are added. The current number of
rows and columns can be determined by calling
<code>getLayoutDimensions()</code>. However, it won't return the correct
values until the components have been laid out at least once before
the call to <code>getLayoutDimensions()</code>. Unless you can be sure the
components have been laid out at least once, you should explicitly
call <code>layoutContainer()</code> to force a layout of the components.
<pre>
GridBagLayout gbl = new GridBagLayout();
<font color="#0066ff"><i>container</i></font>.setLayout(gbl);
// Add components to container and gbl
// Force the layout of components before calling getLayoutDimensions()
gbl.layoutContainer(<font color="#0066ff"><i>container</i></font>);
// Get the dimensions
int[][] dim = gbl.getLayoutDimensions();
int cols = dim[0].length;
int rows = dim[1].length;
</pre>
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Related Examples
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e626. <a class="eglink" href="gridbag_Using.html?l=rel">
Creating a GridBagLayout
</a>
<br>
e627. <a class="eglink" href="gridbag_Pos.html?l=rel">
Setting the Location of a Component in a GridBagLayout
</a>
<br>
e629. <a class="eglink" href="gridbag_StretchAll.html?l=rel">
Making a GridBagLayout Fill the Container
</a>
<br>
e630. <a class="eglink" href="gridbag_Stretch.html?l=rel">
Setting the Stretchyness of Rows and Columns in a GridBagLayout Using Layout Weights
</a>
<br>
e631. <a class="eglink" href="gridbag_StretchComp.html?l=rel">
Setting the Stretchyness of Columns and Rows in a GridBagLayout Using Component Weights
</a>
<br>
e632. <a class="eglink" href="gridbag_Fill.html?l=rel">
Setting the Stretchyness of a Component Within the Cell of a GridBagLayout Using Fill
</a>
<br>
e633. <a class="eglink" href="gridbag_Anchor.html?l=rel">
Setting the Location of a Component Within the Cell of a GridBagLayout Using Anchors
</a>
<br>
e634. <a class="eglink" href="gridbag_Inset.html?l=rel">
Setting the Space around a Component Within the Cell of the GridBagLayout Using Insets
</a>
<br>
e635. <a class="eglink" href="gridbag_Ipad.html?l=rel">
Adjusting the Size of a Component in a GridBadLayout Using Internal Padding
</a>
<br>
e636. <a class="eglink" href="gridbag_Max.html?l=rel">
Setting a Row or Column of a GridBadLayout to a Particular Size
</a>
<br>
e637. <a class="eglink" href="gridbag_Gap.html?l=rel">
Setting Gap Sizes in a GridBadLayout
</a>
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See also:
<a class="eglink" href="/egs/java.awt/pkg.html?l=rel#Colors">
Colors
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<a class="eglink" href="/egs/java.awt/pkg.html?l=rel#Components">
Components
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<a class="eglink" href="/egs/java.awt/pkg.html?l=rel#Containers">
Containers
</a>
<a class="eglink" href="/egs/java.awt/pkg.html?l=rel#Cursors">
Cursors
</a>
<a class="eglink" href="/egs/java.awt/pkg.html?l=rel#Drawing">
Drawing
</a>
<a class="eglink" href="/egs/java.awt/pkg.html?l=rel#Events">
Events
</a>
<a class="eglink" href="/egs/java.awt/pkg.html?l=rel#Focus">
Focus
</a>
<a class="eglink" href="/egs/java.awt/pkg.html?l=rel#Frames">
Frames
</a>
<a class="eglink" href="/egs/java.awt/pkg.html?l=rel#Images">
Images
</a>
<a class="eglink" href="/egs/java.awt/pkg.html?l=rel#Shapes">
Shapes
</a>
<a class="eglink" href="/egs/java.awt/pkg.html?l=rel#Simulating%20Events">
Simulating Events
</a>
<a class="eglink" href="/egs/java.awt/pkg.html?l=rel#Text">
Text
</a>
<a class="eglink" href="/egs/java.awt/pkg.html?l=rel#The%20Screen">
The Screen
</a>
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