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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/examples/popup/popup.doc:4 -->
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<html>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>Popup Widgets</title>
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<style type="text/css"><!--
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fn { margin-left: 1cm; text-indent: -1cm; }
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--></style>
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<body>
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<table border="0" cellpadding="0" cellspacing="0" width="100%">
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<font color="#004faf">All Classes</font></a>
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</td>
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<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>Popup Widgets</h1>
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<p>
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This example shows how to implement widgets that should
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pop up.
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<p> <hr>
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<p> Header file:
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<p> <pre>/****************************************************************************
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** $Id: qt/popup.h 3.3.8 edited Jan 11 14:46 $
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**
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** Definition of something or other
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**
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** Created : 979899
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**
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** Copyright (C) 1997-2007 Trolltech ASA. All rights reserved.
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**
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** This file is part of an example program for TQt. This example
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** program may be used, distributed and modified without limitation.
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**
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*****************************************************************************/
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#ifndef POPUP_H
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#define POPUP_H
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#include <<a href="qlabel-h.html">ntqlabel.h</a>>
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#include <<a href="qpushbutton-h.html">ntqpushbutton.h</a>>
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#include <<a href="qlineedit-h.html">ntqlineedit.h</a>>
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class FancyPopup : public <a href="ntqlabel.html">TQLabel</a>
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{
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<a href="metaobjects.html#Q_OBJECT">Q_OBJECT</a>
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public:
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FancyPopup( <a href="ntqwidget.html">TQWidget</a>* parent = 0, const char* name=0);
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void popup( <a href="ntqwidget.html">TQWidget</a>* parent = 0);
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protected:
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virtual void mouseMoveEvent( <a href="qmouseevent.html">TQMouseEvent</a> * );
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virtual void mouseReleaseEvent( <a href="qmouseevent.html">TQMouseEvent</a> * );
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virtual void closeEvent( <a href="qcloseevent.html">TQCloseEvent</a> * );
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private:
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<a href="ntqwidget.html">TQWidget</a>* popupParent;
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int moves;
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};
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class Frame : public <a href="ntqframe.html">TQFrame</a>
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{
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Q_OBJECT
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public:
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Frame( <a href="ntqwidget.html">TQWidget</a> *parent=0, const char* name=0);
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protected:
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private slots:
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void button1Clicked();
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void button2Pressed();
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private:
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<a href="ntqpushbutton.html">TQPushButton</a> *button1;
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<a href="ntqpushbutton.html">TQPushButton</a> *button2;
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<a href="ntqframe.html">TQFrame</a>* popup1;
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FancyPopup* popup2;
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};
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#endif
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</pre>
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<p> <hr>
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<p> Implementation:
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<p> <pre>/****************************************************************************
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** $Id: qt/popup.cpp 3.3.8 edited Jan 11 14:37 $
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**
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** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
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**
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** This file is part of an example program for TQt. This example
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** program may be used, distributed and modified without limitation.
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**
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*****************************************************************************/
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#include "popup.h"
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#include <<a href="qapplication-h.html">ntqapplication.h</a>>
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#include <<a href="qlayout-h.html">ntqlayout.h</a>>
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<a name="f468"></a>FancyPopup::FancyPopup( <a href="ntqwidget.html">TQWidget</a>* parent, const char* name ):
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<a href="ntqlabel.html">TQLabel</a>( parent, name, WType_Popup ){
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<a href="ntqframe.html#setFrameStyle">setFrameStyle</a>( WinPanel|Raised );
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<a href="ntqlabel.html#setAlignment">setAlignment</a>( AlignCenter );
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<a href="ntqwidget.html#resize">resize</a>(150,100);
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moves = 0;
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<a href="ntqwidget.html#setMouseTracking">setMouseTracking</a>( TRUE );
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}
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<a name="x1620"></a>void FancyPopup::<a href="ntqwidget.html#mouseMoveEvent">mouseMoveEvent</a>( <a href="qmouseevent.html">TQMouseEvent</a> * e){
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moves++;
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<a href="ntqstring.html">TQString</a> s;
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<a name="x1611"></a> s.<a href="ntqstring.html#sprintf">sprintf</a>("%d/%d", e-><a href="qmouseevent.html#pos">pos</a>().x(), e-><a href="qmouseevent.html#pos">pos</a>().y());
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<a name="x1612"></a> if (e-><a href="qmouseevent.html#state">state</a>() & TQMouseEvent::LeftButton)
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s += " (down)";
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<a href="ntqlabel.html#setText">setText</a>(s);
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}
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<a name="x1621"></a>void FancyPopup::<a href="ntqwidget.html#mouseReleaseEvent">mouseReleaseEvent</a>( <a href="qmouseevent.html">TQMouseEvent</a> * e){
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if (<a href="ntqwidget.html#rect">rect</a>().contains( e-><a href="qmouseevent.html#pos">pos</a>() ) || moves > 5)
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<a href="ntqwidget.html#close">close</a>();
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}
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<a name="x1617"></a>void FancyPopup::<a href="ntqwidget.html#closeEvent">closeEvent</a>( <a href="qcloseevent.html">TQCloseEvent</a> *e ){
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<a name="x1607"></a> e-><a href="qcloseevent.html#accept">accept</a>();
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moves = 0;
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if (!popupParent)
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return;
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// remember that we (as a popup) might recieve the mouse release
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// event instead of the popupParent. This is due to the fact that
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// the popupParent popped us up in its mousePressEvent handler. To
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// avoid the button remaining in pressed state we simply send a
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// faked mouse button release event to it.
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<a href="qmouseevent.html">TQMouseEvent</a> me( TQEvent::MouseButtonRelease, TQPoint(0,0), TQPoint(0,0), TQMouseEvent::LeftButton, TQMouseEvent::NoButton);
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<a name="x1602"></a> TQApplication::<a href="ntqapplication.html#sendEvent">sendEvent</a>( popupParent, &me );
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}
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void <a name="f469"></a>FancyPopup::popup( <a href="ntqwidget.html">TQWidget</a>* parent) {
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popupParent = parent;
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setText("Move the mouse!");
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if (popupParent)
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<a href="ntqwidget.html#move">move</a>( popupParent->mapToGlobal( popupParent->rect().bottomLeft() ) );
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<a href="ntqwidget.html#show">show</a>();
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}
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<a name="f470"></a>Frame::Frame(TQWidget* parent, const char* name): <a href="ntqframe.html">TQFrame</a>(parent, name){
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button1 = new <a href="ntqpushbutton.html">TQPushButton</a>("Simple Popup", this);
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<a href="ntqobject.html#connect">connect</a> ( button1, SIGNAL( <a href="ntqbutton.html#clicked">clicked</a>() ), SLOT( button1Clicked() ) );
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button2 = new <a href="ntqpushbutton.html">TQPushButton</a>("Fancy Popup", this);
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<a name="x1606"></a> <a href="ntqobject.html#connect">connect</a> ( button2, SIGNAL( <a href="ntqbutton.html#pressed">pressed</a>() ), SLOT( button2Pressed() ) );
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<a href="qboxlayout.html">TQBoxLayout</a> * l = new <a href="qhboxlayout.html">TQHBoxLayout</a>( this );
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<a name="x1627"></a><a name="x1614"></a> button1-><a href="ntqwidget.html#setMaximumSize">setMaximumSize</a>(button1-><a href="ntqwidget.html#sizeHint">sizeHint</a>());
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button2-><a href="ntqwidget.html#setMaximumSize">setMaximumSize</a>(button2-><a href="ntqwidget.html#sizeHint">sizeHint</a>());
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l-><a href="qboxlayout.html#addWidget">addWidget</a>( button1 );
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l-><a href="qboxlayout.html#addWidget">addWidget</a>( button2 );
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<a name="x1609"></a> l-><a href="ntqlayout.html#activate">activate</a>();
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<a name="x1613"></a>// button1-><a href="ntqwidget.html#setGeometry">setGeometry</a>(20,20,100,30);
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// button2-><a href="ntqwidget.html#setGeometry">setGeometry</a>(140,20,100,30);
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<a href="ntqwidget.html#resize">resize</a>(270, 70);
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//create a very simple popup: it is just composed with other
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//widget and will be shown after clicking on button1
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popup1 = new <a href="ntqframe.html">TQFrame</a>( this ,0, WType_Popup);
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popup1-><a href="ntqframe.html#setFrameStyle">setFrameStyle</a>( WinPanel|Raised );
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popup1-><a href="ntqwidget.html#resize">resize</a>(150,100);
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<a href="ntqlineedit.html">TQLineEdit</a> *tmpE = new <a href="ntqlineedit.html">TQLineEdit</a>( popup1 );
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<a name="x1619"></a><a name="x1610"></a> <a href="ntqobject.html#connect">connect</a>( tmpE, SIGNAL( <a href="ntqlineedit.html#returnPressed">returnPressed</a>() ), popup1, SLOT( <a href="ntqwidget.html#hide">hide</a>() ) );
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<a name="x1626"></a> tmpE-><a href="ntqwidget.html#setGeometry">setGeometry</a>(10,10, 130, 30);
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<a name="x1625"></a> tmpE-><a href="ntqwidget.html#setFocus">setFocus</a>();
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<a href="ntqpushbutton.html">TQPushButton</a> *tmpB = new <a href="ntqpushbutton.html">TQPushButton</a>("Click me!", popup1);
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<a name="x1616"></a> <a href="ntqobject.html#connect">connect</a>( tmpB, SIGNAL( <a href="ntqbutton.html#clicked">clicked</a>() ), popup1, SLOT( <a href="ntqwidget.html#close">close</a>() ) );
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tmpB-><a href="ntqwidget.html#setGeometry">setGeometry</a>(10, 50, 130, 30);
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// the fancier version uses its own class. It will be shown when
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// pressing button2, so they behavior is more like a modern menu
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// or toolbar.
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popup2 = new FancyPopup( this );
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// you might also add new widgets to the popup, just like you do
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// it with any other widget. The next four lines (if not
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// commented out) will for instance add a line edit widget.
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// tmpE = new <a href="ntqlineedit.html">TQLineEdit</a>( popup2 );
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// tmpE-><a href="ntqwidget.html#setFocus">setFocus</a>();
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// connect( tmpE, SIGNAL( <a href="ntqlineedit.html#returnPressed">returnPressed</a>() ), popup2, SLOT( <a href="ntqwidget.html#close">close</a>() ) );
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// tmpE-><a href="ntqwidget.html#setGeometry">setGeometry</a>(10, 10, 130, 30);
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}
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void <a name="f471"></a>Frame::button1Clicked(){
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<a name="x1622"></a><a name="x1618"></a> popup1-><a href="ntqwidget.html#move">move</a>( <a href="ntqwidget.html#mapToGlobal">mapToGlobal</a>( button1-><a href="ntqwidget.html#geometry">geometry</a>().bottomLeft() ) );
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<a name="x1628"></a> popup1-><a href="ntqwidget.html#show">show</a>();
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}
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void <a name="f472"></a>Frame::button2Pressed(){
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popup2->popup(button2);
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}
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int main( int argc, char **argv )
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{
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<a href="ntqapplication.html">TQApplication</a> a(argc,argv);
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Frame frame;
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frame.<a href="ntqwidget.html#setCaption">setCaption</a>("TQt Example - Custom Popups");
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a.<a href="ntqapplication.html#setMainWidget">setMainWidget</a>(&frame);
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frame.<a href="ntqwidget.html#show">show</a>();
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return a.<a href="ntqapplication.html#exec">exec</a>();
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}
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</pre>
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<p>See also <a href="examples.html">Examples</a>.
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<!-- eof -->
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<p><address><hr><div align=center>
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<table width=100% cellspacing=0 border=0><tr>
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<td>Copyright © 2007
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<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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<td align=right><div align=right>TQt 3.3.8</div>
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</table></div></address></body>
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</html>
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