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<td >Qt 5.9</td><td ><a href="qtquickcontrols2-index.html">Qt Quick Controls 2</a></td><td ><a href="qtquick-controls2-qmlmodule.html">QML Types</a></td><td >ProgressBar QML Type</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right">Qt 5.9.5 Reference Documentation</td>
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<h3><a name="toc">Contents</a></h3>
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<li class="level1"><a href="#properties">Properties</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
</ul>
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<h1 class="title">ProgressBar QML Type</h1>
<span class="subtitle"></span>
<!-- $$$ProgressBar-brief -->
<p>Indicates the progress of an operation. <a href="#details">More...</a></p>
<!-- @@@ProgressBar -->
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> Import Statement:</td><td class="memItemRight bottomAlign"> import QtQuick.Controls 2.2</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Since:</td><td class="memItemRight bottomAlign"> Qt 5.7</td></tr></table></div><ul>
<li><a href="qml-qtquick-controls2-progressbar-members.html">List of all members, including inherited members</a></li>
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<a name="properties"></a>
<h2 id="properties">Properties</h2>
<ul>
<li class="fn"><b><b><a href="qml-qtquick-controls2-progressbar.html#from-prop">from</a></b></b> : real</li>
<li class="fn"><b><b><a href="qml-qtquick-controls2-progressbar.html#indeterminate-prop">indeterminate</a></b></b> : bool</li>
<li class="fn"><b><b><a href="qml-qtquick-controls2-progressbar.html#position-prop">position</a></b></b> : real</li>
<li class="fn"><b><b><a href="qml-qtquick-controls2-progressbar.html#to-prop">to</a></b></b> : real</li>
<li class="fn"><b><b><a href="qml-qtquick-controls2-progressbar.html#value-prop">value</a></b></b> : real</li>
<li class="fn"><b><b><a href="qml-qtquick-controls2-progressbar.html#visualPosition-prop">visualPosition</a></b></b> : real</li>
</ul>
<!-- $$$ProgressBar-description -->
<a name="details"></a>
<h2 id="details">Detailed Description</h2>
<p class="centerAlign"><img src="images/qtquickcontrols2-progressbar.gif" alt="" /></p><p><a href="qml-qtquick-controls2-progressbar.html">ProgressBar</a> indicates the progress of an operation. The value should be updated regularly. The range is defined by <a href="qml-qtquick-controls2-progressbar.html#from-prop">from</a> and <a href="qml-qtquick-controls2-progressbar.html#to-prop">to</a>, which both can contain any value.</p>
<pre class="cpp">
ProgressBar {
value: <span class="number">0.5</span>
}
</pre>
<p><a href="qml-qtquick-controls2-progressbar.html">ProgressBar</a> also supports a special <a href="qml-qtquick-controls2-progressbar.html#indeterminate-prop">indeterminate</a> mode, which is useful, for example, when unable to determine the size of the item being downloaded, or if the download progress gets interrupted due to a network disconnection.</p>
<p class="centerAlign"><img src="images/qtquickcontrols2-progressbar-indeterminate.gif" alt="" /></p><pre class="cpp">
ProgressBar {
indeterminate: <span class="keyword">true</span>
}
</pre>
<p>The indeterminate mode is similar to a <a href="qml-qtquick-controls2-busyindicator.html">BusyIndicator</a>. Both can be used to indicate background activity. The main difference is visual, and that <a href="qml-qtquick-controls2-progressbar.html">ProgressBar</a> can also present a concrete amount of progress (when it can be determined). Due to the visual difference, indeterminate progress bars and busy indicators fit different places in user interfaces. Typical places for an indeterminate progress bar:</p>
<ul>
<li>at the bottom of a <a href="qml-qtquick-controls2-toolbar.html">ToolBar</a></li>
<li>inline within the content of a <a href="qml-qtquick-controls2-page.html">Page</a></li>
<li>in an <a href="qml-qtquick-controls2-itemdelegate.html">ItemDelegate</a> to show the progress of a particular item</li>
</ul>
<p><b>See also </b><a href="qtquickcontrols2-customize.html#customizing-progressbar">Customizing ProgressBar</a>, <a href="qml-qtquick-controls2-busyindicator.html">BusyIndicator</a>, and <a href="qtquickcontrols2-indicators.html">Indicator Controls</a>.</p>
<!-- @@@ProgressBar -->
<h2>Property Documentation</h2>
<!-- $$$from -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="from-prop">
<td class="tblQmlPropNode"><p>
<a name="from-prop"></a><span class="name">from</span> : <span class="type">real</span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This property holds the starting value for the progress. The default value is <code>0.0</code>.</p>
<p><b>See also </b><a href="qml-qtquick-controls2-progressbar.html#to-prop">to</a> and <a href="qml-qtquick-controls2-progressbar.html#value-prop">value</a>.</p>
</div></div><!-- @@@from -->
<br/>
<!-- $$$indeterminate -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="indeterminate-prop">
<td class="tblQmlPropNode"><p>
<a name="indeterminate-prop"></a><span class="name">indeterminate</span> : <span class="type">bool</span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This property holds whether the progress bar is in indeterminate mode. A progress bar in indeterminate mode displays that an operation is in progress, but it doesn't show how much progress has been made.</p>
<p class="centerAlign"><img src="images/qtquickcontrols2-progressbar-indeterminate.gif" alt="" /></p></div></div><!-- @@@indeterminate -->
<br/>
<!-- $$$position -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="position-prop">
<td class="tblQmlPropNode"><p>
<a name="position-prop"></a><span class="qmlreadonly">[read-only] </span><span class="name">position</span> : <span class="type">real</span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This property holds the logical position of the progress.</p>
<p>The position is expressed as a fraction of the value, in the range <code>0.0 - 1.0</code>. For visualizing the progress, the right-to-left aware <a href="qml-qtquick-controls2-progressbar.html#visualPosition-prop">visualPosition</a> should be used instead.</p>
<p><b>See also </b><a href="qml-qtquick-controls2-progressbar.html#value-prop">value</a> and <a href="qml-qtquick-controls2-progressbar.html#visualPosition-prop">visualPosition</a>.</p>
</div></div><!-- @@@position -->
<br/>
<!-- $$$to -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="to-prop">
<td class="tblQmlPropNode"><p>
<a name="to-prop"></a><span class="name">to</span> : <span class="type">real</span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This property holds the end value for the progress. The default value is <code>1.0</code>.</p>
<p><b>See also </b><a href="qml-qtquick-controls2-progressbar.html#from-prop">from</a> and <a href="qml-qtquick-controls2-progressbar.html#value-prop">value</a>.</p>
</div></div><!-- @@@to -->
<br/>
<!-- $$$value -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="value-prop">
<td class="tblQmlPropNode"><p>
<a name="value-prop"></a><span class="name">value</span> : <span class="type">real</span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This property holds the progress value. The default value is <code>0.0</code>.</p>
<p><b>See also </b><a href="qml-qtquick-controls2-progressbar.html#from-prop">from</a>, <a href="qml-qtquick-controls2-progressbar.html#to-prop">to</a>, and <a href="qml-qtquick-controls2-progressbar.html#position-prop">position</a>.</p>
</div></div><!-- @@@value -->
<br/>
<!-- $$$visualPosition -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="visualPosition-prop">
<td class="tblQmlPropNode"><p>
<a name="visualPosition-prop"></a><span class="qmlreadonly">[read-only] </span><span class="name">visualPosition</span> : <span class="type">real</span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This property holds the visual position of the progress.</p>
<p>The position is expressed as a fraction of the value, in the range <code>0.0 - 1.0</code>. When the control is <a href="qml-qtquick-controls2-control.html#mirrored-prop">mirrored</a>, <code>visuaPosition</code> is equal to <code>1.0 - position</code>. This makes <code>visualPosition</code> suitable for visualizing the progress, taking right-to-left support into account.</p>
<p><b>See also </b><a href="qml-qtquick-controls2-progressbar.html#position-prop">position</a> and <a href="qml-qtquick-controls2-progressbar.html#value-prop">value</a>.</p>
</div></div><!-- @@@visualPosition -->
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