<doc>

<legacy_id>1278</legacy_id>

<name>mainStackChanged</name>

<type>message</type>

<syntax>

<example>mainStackChanged</example>

</syntax>

<library></library>

<objects>

<stack/>

</objects>

<synonyms>

</synonyms>

<classification>

<category>Objects &amp; Messages</category>

</classification>

<references>

<property tag="mainStack">mainStack Property</property>

</references>

<history>

<introduced version="1.0">Added.</introduced>

</history>

<platforms>

<mac/>

<windows/>

<linux/>

<ios/>

<android/>

</platforms>

<classes>

<desktop/>

<server/>

<web/>

<mobile/>

</classes>

<security>

</security>

<summary>Sent to a <object tag="stack">stack</object> when its <property tag="mainStack">mainStack</property> is changed.</summary>

<examples>

<example>on mainStackChanged <code><i>-- in a main stack's script</i></code></p><p> save me <code><i>-- save the stack file when a substack is added</i></code></p><p>end mainStackChanged</example>

</examples>

<description>

<p>Handle the <b>mainStackChanged</b> <keyword tag="message box">message</keyword> if you want to respond when a <glossary tag="substack">substack</glossary> is moved to another <glossary tag="stack file">stack file</glossary>.</p><p/><p><b>Comments:</b></p><p>Each stack file consists of a main stack, and may also include one or more substacks. To move a stack to another file, you set its <b>mainStack</b> property to the name of the main stack of the destination file. The moved stack becomes a substack of the main stack you specified.</p><p/><p>The <b>mainStackChanged</b> message is sent right after the stack is moved to the new stack file. This means that (if the substack does not trap the message) the <b>mainStackChanged</b> message is received by the new main stack, and can be handled in the main stack's script.</p><p/><p>The <b>mainStackChanged</b> <keyword tag="message box">message</keyword> is used by the LiveCode <glossary tag="development environment">development environment</glossary>, so if you <glossary tag="handle">handle</glossary> this <keyword tag="message box">message</keyword>, be sure to <control_st tag="pass">pass</control_st> it at the end of the <glossary tag="handler">handler</glossary>.</p>

</description>

</doc>