Difference between revisions of "Select an Entry or Add a New One ComboBox"

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[[Category:HowTo]]<br />[[Category:snippets]]
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[[Category:HowTo]]
 
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[[Category:snippets]]
= How to select a specific text entry (or add it if does not exist) in a combo box =
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The following method acts on a combo box searching for a specified text string and:
 
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* if the string is present select it
The following method acts on a combo box searching for a specified text string and:<br />* if the string is present select it<br />* if the string is not present add it to the combo box model
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* if the string is not present add it to the combo box model
  
 
In the following piece of code ''myText'' is the QString searched for and ''combo'' is a reference to the combo box.
 
In the following piece of code ''myText'' is the QString searched for and ''combo'' is a reference to the combo box.
  
<code> bool found = false;<br /> for( int i = 0; i &lt; combo-&gt;count() &amp;&amp; ! found ; i++ )<br /> if( combo-&gt;itemText( i ) == myText ){<br /> combo-&gt;setCurrentIndex( i );<br /> found = true;<br /> }
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<code>
 
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bool found = false;
if( ! found ){<br /> int index = combo-&gt;count();<br /> combo-&gt;addItem( myText );
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for( int i = 0; i < combo->count() && ! found ; i++ ) {
 
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if( combo->itemText( i ) == myText ) {
combo-&gt;setCurrentIndex( index );
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  combo->setCurrentIndex( i );
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  found = true;
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}
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}
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if (!found ) {
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int index = combo->count();
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combo->addItem( myText );
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}
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combo->setCurrentIndex( index );
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</code>

Latest revision as of 14:20, 24 March 2016

The following method acts on a combo box searching for a specified text string and:

  • if the string is present select it
  • if the string is not present add it to the combo box model

In the following piece of code myText is the QString searched for and combo is a reference to the combo box.

bool found = false; for( int i = 0; i < combo->count() && ! found ; i++ ) {

if( combo->itemText( i ) == myText ) {
 combo->setCurrentIndex( i );
 found = true;
}

} if (!found ) {

int index = combo->count();
combo->addItem( myText );

} combo->setCurrentIndex( index );