212 lines
8.3 KiB
HTML
212 lines
8.3 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
|
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:xlink="http://www.w3.org/1999/xlink">
|
|
<head>
|
|
<meta content="text/html; charset=utf-8" http-equiv="Content-Type">
|
|
<title>Item Reordering</title>
|
|
<link href="style.css" rel="stylesheet" type="text/css">
|
|
<link href="prettify.css" type="text/css" rel="stylesheet">
|
|
<script type="text/javascript" src="prettify.js"></script><script type="text/javascript" src="lang-vb.js"></script><link href="../resources/main.css" media="screen" rel="stylesheet" type="text/css">
|
|
</head>
|
|
<body onload="prettyPrint()"><div class="placing">
|
|
<br><table class="navigation"><tr>
|
|
<td class="navigation-previous"><a href="chapter-item-hierarchy.html"><strong>
|
|
« Item Hierarchy</strong></a></td>
|
|
<td class="navigation-index"><a href="../../../better-listview-express/documentation.html"><strong>Index</strong></a></td>
|
|
<td class="navigation-next"><a href="chapter-items.html"><strong>Items »
|
|
</strong></a></td>
|
|
</tr></table>
|
|
<br><h1>Item Reordering</h1>
|
|
<div class="banner">
|
|
<a href="../../../blog/page/6/index.html"><img src="../resources/overview.gif" alt="Better ListView" class="ss"></a>
|
|
<div class="inside">
|
|
<div class="text">Better ListView: Ultimate .NET ListView replacement control for WinForms (C#, VB.NET)</div>
|
|
<span class="dbtn-c dbtn-hilight"><span class="dbtn-w"><a href="../../../betterlistview.exe" class="dbtn">Download</a></span></span>
|
|
<span class="dbtn-c"><span class="dbtn-w"><a href="../../../blog/page/6/index.html" class="dbtn">More Info</a></span></span>
|
|
</div>
|
|
</div>
|
|
|
|
|
|
|
|
|
|
|
|
<br><hr>
|
|
<p class="note">Item reordering is not supported in <strong><em>Better ListView
|
|
Express</em></strong>.</p>
|
|
<hr>
|
|
<br><p class="images"><img src="item-reorder.png"></p>
|
|
|
|
<p>Changing item order by dragging items can be turned on by setting
|
|
<span class="code">ItemReorderMode</span> to one of the following values:</p>
|
|
|
|
<ul style="list-style:none">
|
|
<li>
|
|
<span class="code">Disabled</span><ul style="list-style:none"><li>
|
|
<p>Item reordering is disabled (default value).</p>
|
|
</li></ul>
|
|
</li>
|
|
<li>
|
|
<span class="code">Enabled</span><ul style="list-style:none"><li>
|
|
<p>Item reordering is enabled and automatic.</p>
|
|
</li></ul>
|
|
</li>
|
|
<li>
|
|
<span class="code">Custom</span><ul style="list-style:none"><li>
|
|
<p>Item reordering is enabled, but the actual reordering is up to
|
|
the user.</p>
|
|
</li></ul>
|
|
</li>
|
|
</ul>
|
|
<p>The reordering is realized through Drag and Drop mechanism.</p>
|
|
|
|
<p>Item reordering can supports groups and item hierarchy.</p>
|
|
|
|
<p>Target location of reordered items is displayed using <strong><em><a href="chapter-insertion-mark.html">Insertion mark</a></em></strong>. If the
|
|
reordering cannot be performed (e.g. when inserting item between its own
|
|
children), then the insertion mark is displayed as disabled and the
|
|
reordering will not be performed.</p>
|
|
|
|
<h2>Reordering Options</h2>
|
|
|
|
|
|
<p>There are several item reordering options to adjust the feature for
|
|
working with groups and hierarchical items. These options can be used as
|
|
flags of the enumm property <span class="code">ItemReorderOptions</span>:</p>
|
|
|
|
<ul style="list-style:none">
|
|
<li>
|
|
<span class="code">AllowCreateChild</span><ul style="list-style:none"><li>
|
|
<p>Allow creating a child items by inserting item into another
|
|
item without children.</p>
|
|
</li></ul>
|
|
</li>
|
|
<li>
|
|
<span class="code">AutoCollapse</span><ul style="list-style:none"><li>
|
|
<p>Collapse item with children prior to reordering.</p>
|
|
</li></ul>
|
|
</li>
|
|
<li>
|
|
<span class="code">KeepGroups</span><ul style="list-style:none"><li>
|
|
<p>Do not change item groups when reordering.</p>
|
|
</li></ul>
|
|
</li>
|
|
<li>
|
|
<span class="code">KeepItemHierarchy</span><ul style="list-style:none"><li>
|
|
<p>Keep parent-child item relations when reordering.</p>
|
|
</li></ul>
|
|
</li>
|
|
<li>
|
|
<span class="code">None</span><ul style="list-style:none"><li>
|
|
<p>No options are active.</p>
|
|
</li></ul>
|
|
</li>
|
|
<li>
|
|
<span class="code">SameParentOnly</span><ul style="list-style:none"><li>
|
|
<p>Allow reordering items with same parent item only.</p>
|
|
</li></ul>
|
|
</li>
|
|
</ul>
|
|
<p>None of the extra options are on by default so the default value is
|
|
<span class="code">ItemReorderOptions.None</span>.</p>
|
|
|
|
|
|
<h2>Auto-Expansion Checking</h2>
|
|
|
|
|
|
<p>Auto expansion checking is performed during item reordering and
|
|
looks whether it is valid to auto expand item over which mouse cursor
|
|
hovers. By default, there is only one situation when auto expansion is not
|
|
allowed: Item which is auto-collapsed will not be than auto-expanded
|
|
again.</p>
|
|
|
|
<p>It is possible to add custom checking (e.g. when some items or
|
|
groups should not expand when user drags items over it) by handling
|
|
<span class="code">CheckAutoExpand</span> event and than set
|
|
<span class="code">BetterListViewCheckAutoExpandEventArgs.IsValid</span> to
|
|
<span class="code">false</span> whenever you want to deny auto-expansion. Event data
|
|
contains both source and target items.</p>
|
|
|
|
|
|
<h2>Item Reordering Checking</h2>
|
|
|
|
|
|
<p>Item reorder checking is performed during item reordering and looks
|
|
whether an item is not put into itself (into its own children). For
|
|
example, when <span class="code">AllowCreateChild</span> reordering option is enabled,
|
|
then the check looks whether user is not making child item under the
|
|
reordered item.</p>
|
|
|
|
<p>It is possible to add custom checking (e.g. when item should not be
|
|
placed some specific locations with item reordering) by handling
|
|
<span class="code">CheckItemReorder</span> event and then set
|
|
<span class="code">BetterListViewCheckItemReorderEventArgs.IsValid</span> to
|
|
<span class="code">false</span>. Event data contains source items, target location and
|
|
current reordering options.</p>
|
|
|
|
|
|
<h2>Sample Source Code</h2>
|
|
|
|
|
|
<p><strong>C#</strong></p>
|
|
<pre class="prettyprint"><code class="lang-cs">this.listView.BeginUpdate();
|
|
|
|
this.listView.Columns.Add("column");
|
|
|
|
this.listView.Items.AddRange(
|
|
new[]
|
|
{
|
|
"first item",
|
|
"second item",
|
|
"third item",
|
|
"fourth item",
|
|
"fifth item"
|
|
});
|
|
|
|
// enable item reordering
|
|
this.listView.ItemReorderMode = BetterListViewItemReorderMode.Enabled;
|
|
|
|
this.listView.EndUpdate();</code></pre>
|
|
|
|
<p><strong>Visual Basic</strong></p>
|
|
<pre class="prettyprint"><code class="lang-vb">ListView.BeginUpdate()
|
|
|
|
ListView.Columns.Add ("column")
|
|
|
|
ListView.Items.AddRange (
|
|
New String() { _
|
|
"first item",
|
|
"second item",
|
|
"third item",
|
|
"fourth item",
|
|
"fifth item"
|
|
})
|
|
|
|
' enable item reordering
|
|
ListView.ItemReorderMode = BetterListViewItemReorderMode.Enabled
|
|
|
|
ListView.EndUpdate()</code></pre>
|
|
|
|
<br><div class="banner">
|
|
<a href="../../../blog/page/6/index.html"><img src="../resources/overview.gif" alt="Better ListView" class="ss"></a>
|
|
<div class="inside">
|
|
<div class="text">Better ListView: Ultimate .NET ListView replacement control for WinForms (C#, VB.NET)</div>
|
|
<span class="dbtn-c dbtn-hilight"><span class="dbtn-w"><a href="../../../betterlistview.exe" class="dbtn">Download</a></span></span>
|
|
<span class="dbtn-c"><span class="dbtn-w"><a href="../../../blog/page/6/index.html" class="dbtn">More Info</a></span></span>
|
|
</div>
|
|
</div>
|
|
<table class="navigation"><tr>
|
|
<td class="navigation-previous"><a href="chapter-item-hierarchy.html"><strong>
|
|
« Item Hierarchy</strong></a></td>
|
|
<td class="navigation-index"><a href="../../../better-listview-express/documentation.html"><strong>Index</strong></a></td>
|
|
<td class="navigation-next"><a href="chapter-items.html"><strong>Items »
|
|
</strong></a></td>
|
|
</tr></table>
|
|
<br><table class="footer"><tr>
|
|
<td class="footer-title">Better ListView Express Documentation
|
|
</td>
|
|
<td class="footer-copyright">
|
|
Copyright © <a href="../../../index.html" target="_blank">ComponentOwl.com</a>
|
|
</td>
|
|
</tr></table>
|
|
</div></body>
|
|
</html>
|