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<li class="navelem"><a class="el" href="classWt_1_1Ext_1_1ProgressDialog.html">ProgressDialog</a> </li>
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<div class="title">Wt::Ext::ProgressDialog Class Reference<div class="ingroups"><a class="el" href="group__ext.html">Ext widgets (Wt::Ext)</a></div></div> </div>
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<!-- doxytag: class="Wt::Ext::ProgressDialog" --><!-- doxytag: inherits="Wt::Ext::MessageBox" -->
<p>A standard dialog to inform the user of progress during a time consuming task.
<a href="classWt_1_1Ext_1_1ProgressDialog.html#details">More...</a></p>
<p><code>#include <Wt/Ext/ProgressDialog></code></p>
<div class="dynheader">
Inheritance diagram for Wt::Ext::ProgressDialog:</div>
<div class="dyncontent">
<div class="center"><img src="classWt_1_1Ext_1_1ProgressDialog__inherit__graph.png" border="0" usemap="#Wt_1_1Ext_1_1ProgressDialog_inherit__map" alt="Inheritance graph"/></div>
<map name="Wt_1_1Ext_1_1ProgressDialog_inherit__map" id="Wt_1_1Ext_1_1ProgressDialog_inherit__map">
<area shape="rect" href="classWt_1_1Ext_1_1MessageBox.html" title="A standard dialog for confirmation or to get simple user input." alt="" coords="12,603,161,629"/><area shape="rect" href="classWt_1_1Ext_1_1Dialog.html" title="A dialog emulates a modal window that blocks the user-interface." alt="" coords="32,528,141,555"/><area shape="rect" href="classWt_1_1Ext_1_1Panel.html" title="A container with a title and standard GUI elements." alt="" coords="33,453,140,480"/><area shape="rect" href="classWt_1_1Ext_1_1Container.html" title="A container class which manages its contents using layout managers." alt="" coords="23,379,151,405"/><area shape="rect" href="classWt_1_1Ext_1_1Component.html" title="An abstract base class for widgets that can be visually disabled." alt="" coords="17,304,156,331"/><area shape="rect" href="classWt_1_1Ext_1_1Widget.html" title="An abstract base class for all Ext widgets." alt="" coords="29,229,144,256"/><area shape="rect" href="classWt_1_1WWebWidget.html" title="A base class for widgets with an HTML counterpart." alt="" coords="23,155,151,181"/><area shape="rect" href="classWt_1_1WWidget.html" title="The abstract base class for a user-interface component." alt="" coords="37,80,136,107"/><area shape="rect" href="classWt_1_1WObject.html" title="A base class for objects that participate in the signal/slot system." alt="" coords="39,5,135,32"/></map>
<center><span class="legend">[<a href="graph_legend.html">legend</a>]</span></center></div>
<p><a href="classWt_1_1Ext_1_1ProgressDialog-members.html">List of all members.</a></p>
<table class="memberdecls">
<tr><td colspan="2"><h2><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1Ext_1_1ProgressDialog.html#a8dcabafaf4235c88cd7eee441448c615">ProgressDialog</a> (bool i18n=false)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Create a new progress dialog. <a href="#a8dcabafaf4235c88cd7eee441448c615"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1Ext_1_1ProgressDialog.html#aa56cda8b6be0140160ef7f3f0a333358">ProgressDialog</a> (const <a class="el" href="classWt_1_1WString.html">WString</a> &text, const <a class="el" href="classWt_1_1WString.html">WString</a> &cancelButtonText, int minimum, int maximum, bool i18n=false)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Create a new progress dialog. <a href="#aa56cda8b6be0140160ef7f3f0a333358"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a74d408dba39fce5fe2561218e5775f23"></a><!-- doxytag: member="Wt::Ext::ProgressDialog::setMinimum" ref="a74d408dba39fce5fe2561218e5775f23" args="(int minimum)" -->
void </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1Ext_1_1ProgressDialog.html#a74d408dba39fce5fe2561218e5775f23">setMinimum</a> (int minimum)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Set the minimum value. <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a3e0e589ccd418b358840af358afab74e"></a><!-- doxytag: member="Wt::Ext::ProgressDialog::minimum" ref="a3e0e589ccd418b358840af358afab74e" args="() const " -->
int </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1Ext_1_1ProgressDialog.html#a3e0e589ccd418b358840af358afab74e">minimum</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Return the minimum value. <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="affbc5da9aaeff04433201c1fb0a9c942"></a><!-- doxytag: member="Wt::Ext::ProgressDialog::setMaximum" ref="affbc5da9aaeff04433201c1fb0a9c942" args="(int maximum)" -->
void </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1Ext_1_1ProgressDialog.html#affbc5da9aaeff04433201c1fb0a9c942">setMaximum</a> (int maximum)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Set the maximum value. <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a8961b393b191d9a52d2e006a80ab3fce"></a><!-- doxytag: member="Wt::Ext::ProgressDialog::maximum" ref="a8961b393b191d9a52d2e006a80ab3fce" args="() const " -->
int </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1Ext_1_1ProgressDialog.html#a8961b393b191d9a52d2e006a80ab3fce">maximum</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Return the maximum value. <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="aec47127780061076a85cb867c1669c9b"></a><!-- doxytag: member="Wt::Ext::ProgressDialog::setRange" ref="aec47127780061076a85cb867c1669c9b" args="(int minimum, int maximum)" -->
void </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1Ext_1_1ProgressDialog.html#aec47127780061076a85cb867c1669c9b">setRange</a> (int minimum, int maximum)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Define the range. <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1Ext_1_1ProgressDialog.html#a5d1e7ade20a3a89b52477ce9846d89c5">cancel</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Cancel the dialog. <a href="#a5d1e7ade20a3a89b52477ce9846d89c5"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1Ext_1_1ProgressDialog.html#a2c9b02eb5d639ec5d4c1214ad47cc2d9">reset</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Reset the dialog. <a href="#a2c9b02eb5d639ec5d4c1214ad47cc2d9"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a9f57021b85bcc1dc7c1e9d820b8999d3"></a><!-- doxytag: member="Wt::Ext::ProgressDialog::setCancelButtonText" ref="a9f57021b85bcc1dc7c1e9d820b8999d3" args="(const WString &text)" -->
void </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1Ext_1_1ProgressDialog.html#a9f57021b85bcc1dc7c1e9d820b8999d3">setCancelButtonText</a> (const <a class="el" href="classWt_1_1WString.html">WString</a> &text)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Set the text used for the cancel button. <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a002c659c327ab7bab26aaa424daf4e2c"></a><!-- doxytag: member="Wt::Ext::ProgressDialog::setValue" ref="a002c659c327ab7bab26aaa424daf4e2c" args="(int progress)" -->
void </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1Ext_1_1ProgressDialog.html#a002c659c327ab7bab26aaa424daf4e2c">setValue</a> (int progress)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Set the current value (in the range from <a class="el" href="classWt_1_1Ext_1_1ProgressDialog.html#a3e0e589ccd418b358840af358afab74e" title="Return the minimum value.">minimum()</a> to <a class="el" href="classWt_1_1Ext_1_1ProgressDialog.html#a8961b393b191d9a52d2e006a80ab3fce" title="Return the maximum value.">maximum()</a>). <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="aec354c2676e811e2c354ce22f02ef1c7"></a><!-- doxytag: member="Wt::Ext::ProgressDialog::value" ref="aec354c2676e811e2c354ce22f02ef1c7" args="() const " -->
int </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1Ext_1_1ProgressDialog.html#aec354c2676e811e2c354ce22f02ef1c7">value</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Return the current value. <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1Ext_1_1ProgressDialog.html#ae728af17b42f24fef38014d2b6cefc97">wasCanceled</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Return if the progress dialog was cancelled. <a href="#ae728af17b42f24fef38014d2b6cefc97"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classWt_1_1Signal.html">Signal</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1Ext_1_1ProgressDialog.html#ac13c421f889ac475a025baed7739ea97">canceled</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Signal emitted when the user cancels the dialog. <a href="#ac13c421f889ac475a025baed7739ea97"></a><br/></td></tr>
</table>
<hr/><a name="details" id="details"></a><h2>Detailed Description</h2>
<div class="textblock"><p>A standard dialog to inform the user of progress during a time consuming task. </p>
<p>A progress bar is shown to show progress from <a class="el" href="classWt_1_1Ext_1_1ProgressDialog.html#a3e0e589ccd418b358840af358afab74e" title="Return the minimum value.">minimum()</a> to <a class="el" href="classWt_1_1Ext_1_1ProgressDialog.html#a8961b393b191d9a52d2e006a80ab3fce" title="Return the maximum value.">maximum()</a>, with the current value within (this range) set using <a class="el" href="classWt_1_1Ext_1_1ProgressDialog.html#a002c659c327ab7bab26aaa424daf4e2c" title="Set the current value (in the range from minimum() to maximum()).">setValue()</a>. When the user cancels the dialog, the dialog is hidden and the <a class="el" href="classWt_1_1Ext_1_1ProgressDialog.html#ac13c421f889ac475a025baed7739ea97" title="Signal emitted when the user cancels the dialog.">canceled()</a> signal is emitted.</p>
<p>The progress dialog may be used in two ways.</p>
<p>The easiest way is using a code snippet like this: </p>
<div class="fragment"><pre class="fragment"> <a class="code" href="classWt_1_1Ext_1_1ProgressDialog.html" title="A standard dialog to inform the user of progress during a time consuming task.">Wt::Ext::ProgressDialog</a> progress(<span class="stringliteral">"Converting contact details..."</span>, <span class="stringliteral">"Cancel"</span>, 0, contacts_.size());
progress.<a class="code" href="classWt_1_1Ext_1_1Dialog.html#ab6a5820f54f9663a592efd112097939a" title="Set the dialog window title.">setWindowTitle</a>(<span class="stringliteral">"Import Contacts"</span>);
<span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> i = 0; i < contacts_.size(); ++i) {
progress.setValue(i);
<a class="code" href="classWt_1_1WApplication.html#a38d922da0a0d83395519f3eaab85d0f6" title="Returns the current application instance.">Wt::WApplication::instance</a>()->processEvents();
<span class="keywordflow">if</span> (!progress.wasCanceled()) {
convertContactDetails(contacts_[i]);
} <span class="keywordflow">else</span> {
<a class="code" href="classWt_1_1WWidget.html#a52dcef5a385ddfa0a8c3e6c20000f181" title="Shows the widget.">Wt::Ext::MessageBox::show</a>(<span class="stringliteral">"Operation cancelled"</span>,
<span class="stringliteral">"You may import your contact details any time later."</span>, <a class="code" href="namespaceWt.html#a270a5e1af09979a6559f0f39e3d93062af92b793210df9123b9be1ee11dd0d36d" title="An OK button.">Ok</a>);
<span class="keywordflow">break</span>;
}
}
</pre></div><p>Using this approach, <a class="el" href="classWt_1_1WApplication.html#a48ceb7972ef7ec0e557adf441f660f2f" title="Processes UI events.">WApplication::processEvents()</a> is used to synchronize the server and client state. This approach has the drawback that browser interactivity is limited.</p>
<p>The more involved approach involves the use of <a class="el" href="classWt_1_1WTimer.html" title="A utility class which provides timer signals and single-shot timers.">WTimer</a> to update the progress in conjunction with a worker thread to do the actual work.</p>
<div class="image">
<img src="ExtProgressDialog-1.png" alt="ExtProgressDialog-1.png"/>
<div class="caption">
Example of a ProgressDialog</div></div>
</div><hr/><h2>Constructor & Destructor Documentation</h2>
<a class="anchor" id="a8dcabafaf4235c88cd7eee441448c615"></a><!-- doxytag: member="Wt::Ext::ProgressDialog::ProgressDialog" ref="a8dcabafaf4235c88cd7eee441448c615" args="(bool i18n=false)" -->
<div class="memitem">
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<td class="memname">Wt::Ext::ProgressDialog::ProgressDialog </td>
<td>(</td>
<td class="paramtype">bool </td>
<td class="paramname"><em>i18n</em> = <code>false</code></td><td>)</td>
<td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Create a new progress dialog. </p>
<p>Creates a new dialog, with window title 'Progress...', no message, and a Cancel button. The progress range is defined from 0 to 100. </p>
</div>
</div>
<a class="anchor" id="aa56cda8b6be0140160ef7f3f0a333358"></a><!-- doxytag: member="Wt::Ext::ProgressDialog::ProgressDialog" ref="aa56cda8b6be0140160ef7f3f0a333358" args="(const WString &text, const WString &cancelButtonText, int minimum, int maximum, bool i18n=false)" -->
<div class="memitem">
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<td class="memname">Wt::Ext::ProgressDialog::ProgressDialog </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="classWt_1_1WString.html">WString</a> & </td>
<td class="paramname"><em>text</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const <a class="el" href="classWt_1_1WString.html">WString</a> & </td>
<td class="paramname"><em>cancelButtonText</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>minimum</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>maximum</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">bool </td>
<td class="paramname"><em>i18n</em> = <code>false</code> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Create a new progress dialog. </p>
<p>Creates a new dialog, with window title 'Progress...', the given message, and a Cancel button. The progress range is defined from <em>minimum</em> to <em>maximum</em> </p>
</div>
</div>
<hr/><h2>Member Function Documentation</h2>
<a class="anchor" id="a5d1e7ade20a3a89b52477ce9846d89c5"></a><!-- doxytag: member="Wt::Ext::ProgressDialog::cancel" ref="a5d1e7ade20a3a89b52477ce9846d89c5" args="()" -->
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<td class="memname">void Wt::Ext::ProgressDialog::cancel </td>
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<p>Cancel the dialog. </p>
<p>Sets the state to cancelled, and hides the dialog. Calling this method does not emit the <a class="el" href="classWt_1_1Ext_1_1ProgressDialog.html#ac13c421f889ac475a025baed7739ea97">canceled</a> signal. </p>
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<a class="anchor" id="ac13c421f889ac475a025baed7739ea97"></a><!-- doxytag: member="Wt::Ext::ProgressDialog::canceled" ref="ac13c421f889ac475a025baed7739ea97" args="()" -->
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<td class="memname"><a class="el" href="classWt_1_1Signal.html">Signal</a>& Wt::Ext::ProgressDialog::canceled </td>
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<p>Signal emitted when the user cancels the dialog. </p>
<p>When the user cancels the dialog, the dialog is hidden, and the state is set to being cancelled.</p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="classWt_1_1Ext_1_1ProgressDialog.html#ae728af17b42f24fef38014d2b6cefc97" title="Return if the progress dialog was cancelled.">wasCanceled()</a> </dd></dl>
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<a class="anchor" id="a2c9b02eb5d639ec5d4c1214ad47cc2d9"></a><!-- doxytag: member="Wt::Ext::ProgressDialog::reset" ref="a2c9b02eb5d639ec5d4c1214ad47cc2d9" args="()" -->
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<td class="memname">void Wt::Ext::ProgressDialog::reset </td>
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<p>Reset the dialog. </p>
<p>The value is reset to the <a class="el" href="classWt_1_1Ext_1_1ProgressDialog.html#a3e0e589ccd418b358840af358afab74e" title="Return the minimum value.">minimum()</a>, and the cancelled state is cleared. </p>
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<td class="memname">bool Wt::Ext::ProgressDialog::wasCanceled </td>
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<p>Return if the progress dialog was cancelled. </p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="classWt_1_1Ext_1_1ProgressDialog.html#ac13c421f889ac475a025baed7739ea97" title="Signal emitted when the user cancels the dialog.">canceled</a>, <a class="el" href="classWt_1_1Ext_1_1ProgressDialog.html#a5d1e7ade20a3a89b52477ce9846d89c5" title="Cancel the dialog.">cancel()</a> </dd></dl>
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