source: trunk/doc/html/scrollview-example.html

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2<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/examples/scrollview/scrollview.doc:4 -->
3<html>
4<head>
5<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
6<title>Scrollview</title>
7<style type="text/css"><!--
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14<body>
15
16<table border="0" cellpadding="0" cellspacing="0" width="100%">
17<tr bgcolor="#E5E5E5">
18<td valign=center>
19 <a href="index.html">
20<font color="#004faf">Home</font></a>
21 | <a href="classes.html">
22<font color="#004faf">All&nbsp;Classes</font></a>
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24<font color="#004faf">Main&nbsp;Classes</font></a>
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26<font color="#004faf">Annotated</font></a>
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30<font color="#004faf">Functions</font></a>
31</td>
32<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>Scrollview</h1>
33
34
35<p>
36This example shows how to use Qt's scrollview. This is a widget
37optimized for very large contents.
38<p> <hr>
39<p> Implementation:
40<p> <pre>/****************************************************************************
41** $Id: scrollview-example.html 2051 2007-02-21 10:04:20Z chehrlic $
42**
43** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
44**
45** This file is part of an example program for Qt. This example
46** program may be used, distributed and modified without limitation.
47**
48*****************************************************************************/
49
50#include &lt;<a href="qscrollview-h.html">qscrollview.h</a>&gt;
51#include &lt;<a href="qapplication-h.html">qapplication.h</a>&gt;
52#include &lt;<a href="qmenubar-h.html">qmenubar.h</a>&gt;
53#include &lt;<a href="qpopupmenu-h.html">qpopupmenu.h</a>&gt;
54#include &lt;<a href="qpushbutton-h.html">qpushbutton.h</a>&gt;
55#include &lt;<a href="qpainter-h.html">qpainter.h</a>&gt;
56#include &lt;<a href="qpixmap-h.html">qpixmap.h</a>&gt;
57#include &lt;<a href="qmessagebox-h.html">qmessagebox.h</a>&gt;
58#include &lt;<a href="qlayout-h.html">qlayout.h</a>&gt;
59#include &lt;<a href="qlabel-h.html">qlabel.h</a>&gt;
60#include &lt;<a href="qmultilineedit-h.html">qmultilineedit.h</a>&gt;
61#include &lt;<a href="qsizegrip-h.html">qsizegrip.h</a>&gt;
62#include &lt;stdlib.h&gt;
63
64
65static const int style_id = 0x1000;
66static const int lw_id = 0x2000;
67static const int mlw_id = 0x4000;
68static const int mw_id = 0x8000;
69static const int max_lw = 16;
70static const int max_mlw = 5;
71static const int max_mw = 10;
72
73
74class BigShrinker : public <a href="qframe.html">QFrame</a> {
75 <a href="metaobjects.html#Q_OBJECT">Q_OBJECT</a>
76public:
77 BigShrinker(QWidget* parent) :
78 <a href="qframe.html">QFrame</a>(parent)
79 {
80 setFrameStyle(QFrame::Box|QFrame::Sunken);
81 int h=35;
82 int b=0;
83 for (int y=0; y&lt;2000-h; y+=h+10) {
84 if (y == 0) {
85 <a href="qbutton.html">QButton</a>* q=new <a href="qpushbutton.html">QPushButton</a>("Quit", this);
86 connect(q, SIGNAL(<a href="qbutton.html#clicked">clicked</a>()), qApp, SLOT(<a href="qapplication.html#quit">quit</a>()));
87 } else {
88 <a href="qstring.html">QString</a> str;
89 if ( b &gt; 0 ) {
90<a name="x656"></a> str.<a href="qstring.html#sprintf">sprintf</a>("Button %d", b++);
91 } else {
92 str = "I'm shrinking!";
93 ++b;
94 }
95 (new <a href="qpushbutton.html">QPushButton</a>(str, this))-&gt;move(y/2,y);
96 }
97 }
98 resize(1000,2000);
99
100 startTimer(250);
101 }
102
103 void timerEvent(QTimerEvent*)
104 {
105 int w=width();
106 int h=height();
107 if ( w &gt; 50 ) w -= 1;
108 if ( h &gt; 50 ) h -= 2;
109 resize(w,h);
110 }
111
112 void mouseReleaseEvent(QMouseEvent* e)
113 {
114 emit clicked(e-&gt;x(), e-&gt;y());
115 }
116
117signals:
118 void clicked(int,int);
119};
120
121class BigMatrix : public <a href="qscrollview.html">QScrollView</a> {
122 <a href="qmultilineedit.html">QMultiLineEdit</a> *dragging;
123public:
124 BigMatrix(QWidget* parent) :
125 <a href="qscrollview.html">QScrollView</a>(parent,"matrix", WStaticContents),
126 bg("bg.ppm")
127 {
128<a name="x640"></a> bg.<a href="qpixmap.html#load">load</a>("bg.ppm");
129 resizeContents(400000,300000);
130
131 dragging = 0;
132 }
133
134 void viewportMousePressEvent(QMouseEvent* e)
135 {
136 int x, y;
137 viewportToContents( e-&gt;x(), e-&gt;y(), x, y );
138 dragging = new <a href="qmultilineedit.html">QMultiLineEdit</a>(viewport(),"Another");
139<a name="x657"></a> dragging-&gt;<a href="qtextedit.html#setText">setText</a>("Thanks!");
140<a name="x650"></a> dragging-&gt;<a href="qwidget.html#resize">resize</a>(100,100);
141 addChild(dragging, x, y);
142 showChild(dragging);
143 }
144
145 void viewportMouseReleaseEvent(QMouseEvent*)
146 {
147 dragging = 0;
148 }
149
150 void viewportMouseMoveEvent(QMouseEvent* e)
151 {
152 if ( dragging ) {
153 int mx, my;
154 viewportToContents( e-&gt;x(), e-&gt;y(), mx, my );
155 int cx = childX(dragging);
156 int cy = childY(dragging);
157 int w = mx - cx + 1;
158 int h = my - cy + 1;
159 <a href="qstring.html">QString</a> msg;
160 msg.<a href="qstring.html#sprintf">sprintf</a>("at (%d,%d) %d by %d",cx,cy,w,h);
161 dragging-&gt;<a href="qtextedit.html#setText">setText</a>(msg);
162 dragging-&gt;<a href="qwidget.html#resize">resize</a>(w,h);
163 }
164 }
165
166protected:
167 void drawContents(QPainter* p, int cx, int cy, int cw, int ch)
168 {
169 // The Background
170<a name="x639"></a> if ( !bg.<a href="qpixmap.html#isNull">isNull</a>() ) {
171<a name="x638"></a> int rowheight=bg.<a href="qpixmap.html#height">height</a>();
172 int toprow=cy/rowheight;
173 int bottomrow=(cy+ch+rowheight-1)/rowheight;
174<a name="x641"></a> int colwidth=bg.<a href="qpixmap.html#width">width</a>();
175 int leftcol=cx/colwidth;
176 int rightcol=(cx+cw+colwidth-1)/colwidth;
177 for (int r=toprow; r&lt;=bottomrow; r++) {
178 int py=r*rowheight;
179 for (int c=leftcol; c&lt;=rightcol; c++) {
180 int px=c*colwidth;
181 p-&gt;drawPixmap(px, py, bg);
182 }
183 }
184 } else {
185 p-&gt;fillRect(cx, cy, cw, ch, QColor(240,222,208));
186 }
187
188 // The Numbers
189 {
190 <a href="qfontmetrics.html">QFontMetrics</a> fm=p-&gt;fontMetrics();
191<a name="x620"></a> int rowheight=fm.<a href="qfontmetrics.html#lineSpacing">lineSpacing</a>();
192 int toprow=cy/rowheight;
193 int bottomrow=(cy+ch+rowheight-1)/rowheight;
194<a name="x621"></a> int colwidth=fm.<a href="qfontmetrics.html#width">width</a>("00000,000000 ")+3;
195 int leftcol=cx/colwidth;
196 int rightcol=(cx+cw+colwidth-1)/colwidth;
197 <a href="qstring.html">QString</a> str;
198 for (int r=toprow; r&lt;=bottomrow; r++) {
199 int py=r*rowheight;
200 for (int c=leftcol; c&lt;=rightcol; c++) {
201 int px=c*colwidth;
202 str.<a href="qstring.html#sprintf">sprintf</a>("%d,%d",c,r);
203<a name="x619"></a> p-&gt;drawText(px+3, py+fm.<a href="qfontmetrics.html#ascent">ascent</a>(), str);
204 }
205 }
206
207 // The Big Hint
208 if (leftcol&lt;10 &amp;&amp; toprow&lt;5) {
209 p-&gt;setFont(QFont("Charter",30));
210 p-&gt;setPen(red);
211 <a href="qstring.html">QString</a> text;
212 text.<a href="qstring.html#sprintf">sprintf</a>("HINT: Look at %d,%d",215000/colwidth,115000/rowheight);
213 p-&gt;drawText(100,50,text);
214 }
215 }
216
217 // The Big X
218 {
219 if (cx+cw&gt;200000 &amp;&amp; cy+ch&gt;100000 &amp;&amp; cx&lt;230000 &amp;&amp; cy&lt;130000) {
220 // Note that some X server cannot even handle co-ordinates
221 // beyond about 4000, so you might not see this.
222 p-&gt;drawLine(200000,100000,229999,129999);
223 p-&gt;drawLine(229999,100000,200000,129999);
224
225 // X marks the spot!
226 p-&gt;setFont(QFont("Charter",100));
227 p-&gt;setPen(blue);
228 p-&gt;drawText(215000-500,115000-100,1000,200,AlignCenter,"YOU WIN!!!!!");
229 }
230 }
231 }
232
233private:
234 <a href="qpixmap.html">QPixmap</a> bg;
235};
236
237class ScrollViewExample : public <a href="qwidget.html">QWidget</a> {
238 Q_OBJECT
239
240public:
241 ScrollViewExample(int technique, QWidget* parent=0, const char* name=0) :
242 <a href="qwidget.html">QWidget</a>(parent,name)
243 {
244 <a href="qmenubar.html">QMenuBar</a>* menubar = new <a href="qmenubar.html">QMenuBar</a>(this);
245 <a href="qapplication.html#Q_CHECK_PTR">Q_CHECK_PTR</a>( menubar );
246
247 <a href="qpopupmenu.html">QPopupMenu</a>* file = new <a href="qpopupmenu.html">QPopupMenu</a>( menubar );
248 <a href="qapplication.html#Q_CHECK_PTR">Q_CHECK_PTR</a>( file );
249<a name="x634"></a> menubar-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "&amp;File", file );
250 file-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "Quit", qApp, SLOT(<a href="qapplication.html#quit">quit</a>()) );
251
252 vp_options = new <a href="qpopupmenu.html">QPopupMenu</a>( menubar );
253 <a href="qapplication.html#Q_CHECK_PTR">Q_CHECK_PTR</a>( vp_options );
254<a name="x644"></a> vp_options-&gt;<a href="qpopupmenu.html#setCheckable">setCheckable</a>( TRUE );
255 menubar-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "&amp;ScrollView", vp_options );
256<a name="x642"></a> connect( vp_options, SIGNAL(<a href="qpopupmenu.html#activated">activated</a>(int)),
257 this, SLOT(doVPMenuItem(int)) );
258
259 vauto_id = vp_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "Vertical Auto" );
260 vaoff_id = vp_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "Vertical AlwaysOff" );
261 vaon_id = vp_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "Vertical AlwaysOn" );
262<a name="x635"></a> vp_options-&gt;<a href="qmenudata.html#insertSeparator">insertSeparator</a>();
263 hauto_id = vp_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "Horizontal Auto" );
264 haoff_id = vp_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "Horizontal AlwaysOff" );
265 haon_id = vp_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "Horizontal AlwaysOn" );
266 vp_options-&gt;<a href="qmenudata.html#insertSeparator">insertSeparator</a>();
267 corn_id = vp_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "cornerWidget" );
268
269 if (technique == 1) {
270 vp = new <a href="qscrollview.html">QScrollView</a>(this);
271<a name="x655"></a> BigShrinker *bs = new BigShrinker(0);//(vp-&gt;<a href="qscrollview.html#viewport">viewport</a>());
272<a name="x645"></a> vp-&gt;<a href="qscrollview.html#addChild">addChild</a>(bs);
273<a name="x659"></a> bs-&gt;<a href="qwidget.html#setAcceptDrops">setAcceptDrops</a>(TRUE);
274 QObject::<a href="qobject.html#connect">connect</a>(bs, SIGNAL(clicked(int,int)),
275<a name="x646"></a> vp, SLOT(<a href="qscrollview.html#center">center</a>(int,int)));
276 } else {
277 vp = new BigMatrix(this);
278 if ( technique == 3 )
279<a name="x648"></a> vp-&gt;<a href="qscrollview.html#enableClipper">enableClipper</a>(TRUE);
280 srand(1);
281 for (int i=0; i&lt;30; i++) {
282 <a href="qmultilineedit.html">QMultiLineEdit</a> *l = new <a href="qmultilineedit.html">QMultiLineEdit</a>(vp-&gt;<a href="qscrollview.html#viewport">viewport</a>(),"First");
283 l-&gt;<a href="qtextedit.html#setText">setText</a>("Drag out more of these.");
284 l-&gt;<a href="qwidget.html#resize">resize</a>(100,100);
285 vp-&gt;<a href="qscrollview.html#addChild">addChild</a>(l, rand()%800, rand()%10000);
286 }
287 vp-&gt;<a href="qscrollview.html#viewport">viewport</a>()-&gt;setBackgroundMode(NoBackground);
288 }
289
290 f_options = new <a href="qpopupmenu.html">QPopupMenu</a>( menubar );
291 <a href="qapplication.html#Q_CHECK_PTR">Q_CHECK_PTR</a>( f_options );
292 f_options-&gt;<a href="qpopupmenu.html#setCheckable">setCheckable</a>( TRUE );
293 menubar-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "F&amp;rame", f_options );
294 connect( f_options, SIGNAL(<a href="qpopupmenu.html#activated">activated</a>(int)),
295 this, SLOT(doFMenuItem(int)) );
296
297 f_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "No Frame", style_id );
298 f_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "Box", style_id|QFrame::Box );
299 f_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "Panel", style_id|QFrame::Panel );
300 f_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "WinPanel", style_id|QFrame::WinPanel );
301 f_options-&gt;<a href="qmenudata.html#insertSeparator">insertSeparator</a>();
302 f_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "Plain", style_id|QFrame::Plain );
303 f_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "Raised", style_id|QFrame::Raised );
304<a name="x633"></a> f_laststyle = f_options-&gt;<a href="qmenudata.html#indexOf">indexOf</a>(
305 f_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "Sunken", style_id|QFrame::Sunken ));
306 f_options-&gt;<a href="qmenudata.html#insertSeparator">insertSeparator</a>();
307 lw_options = new <a href="qpopupmenu.html">QPopupMenu</a>( menubar );
308 <a href="qapplication.html#Q_CHECK_PTR">Q_CHECK_PTR</a>( lw_options );
309 lw_options-&gt;<a href="qpopupmenu.html#setCheckable">setCheckable</a>( TRUE );
310 for (int lw = 1; lw &lt;= max_lw; lw++) {
311 <a href="qstring.html">QString</a> str;
312 str.<a href="qstring.html#sprintf">sprintf</a>("%d Pixels", lw);
313 lw_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( str, lw_id | lw );
314 }
315 f_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "Line Width", lw_options );
316 connect( lw_options, SIGNAL(<a href="qpopupmenu.html#activated">activated</a>(int)),
317 this, SLOT(doFMenuItem(int)) );
318 mlw_options = new <a href="qpopupmenu.html">QPopupMenu</a>( menubar );
319 <a href="qapplication.html#Q_CHECK_PTR">Q_CHECK_PTR</a>( mlw_options );
320 mlw_options-&gt;<a href="qpopupmenu.html#setCheckable">setCheckable</a>( TRUE );
321 for (int mlw = 0; mlw &lt;= max_mlw; mlw++) {
322 <a href="qstring.html">QString</a> str;
323 str.<a href="qstring.html#sprintf">sprintf</a>("%d Pixels", mlw);
324 mlw_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( str, mlw_id | mlw );
325 }
326 f_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "Midline Width", mlw_options );
327 connect( mlw_options, SIGNAL(<a href="qpopupmenu.html#activated">activated</a>(int)),
328 this, SLOT(doFMenuItem(int)) );
329 mw_options = new <a href="qpopupmenu.html">QPopupMenu</a>( menubar );
330 <a href="qapplication.html#Q_CHECK_PTR">Q_CHECK_PTR</a>( mw_options );
331 mw_options-&gt;<a href="qpopupmenu.html#setCheckable">setCheckable</a>( TRUE );
332 for (int mw = 0; mw &lt;= max_mw; mw++) {
333 <a href="qstring.html">QString</a> str;
334 str.<a href="qstring.html#sprintf">sprintf</a>("%d Pixels", mw);
335 mw_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( str, mw_id | mw );
336 }
337 f_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "Margin Width", mw_options );
338 connect( mw_options, SIGNAL(<a href="qpopupmenu.html#activated">activated</a>(int)),
339 this, SLOT(doFMenuItem(int)) );
340
341 setVPMenuItems();
342 setFMenuItems();
343
344 <a href="qvboxlayout.html">QVBoxLayout</a>* vbox = new <a href="qvboxlayout.html">QVBoxLayout</a>(this);
345<a name="x631"></a> vbox-&gt;<a href="qlayout.html#setMenuBar">setMenuBar</a>(menubar);
346<a name="x632"></a> menubar-&gt;<a href="qmenubar.html#setSeparator">setSeparator</a>(QMenuBar::InWindowsStyle);
347 vbox-&gt;<a href="qboxlayout.html#addWidget">addWidget</a>(vp);
348<a name="x630"></a> vbox-&gt;<a href="qlayout.html#activate">activate</a>();
349
350 corner = new <a href="qsizegrip.html">QSizeGrip</a>(this);
351<a name="x658"></a> corner-&gt;<a href="qwidget.html#hide">hide</a>();
352 }
353
354private slots:
355 void doVPMenuItem(int id)
356 {
357 if (id == vauto_id ) {
358<a name="x653"></a> vp-&gt;<a href="qscrollview.html#setVScrollBarMode">setVScrollBarMode</a>(QScrollView::Auto);
359 } else if (id == vaoff_id) {
360 vp-&gt;<a href="qscrollview.html#setVScrollBarMode">setVScrollBarMode</a>(QScrollView::AlwaysOff);
361 } else if (id == vaon_id) {
362 vp-&gt;<a href="qscrollview.html#setVScrollBarMode">setVScrollBarMode</a>(QScrollView::AlwaysOn);
363 } else if (id == hauto_id) {
364<a name="x652"></a> vp-&gt;<a href="qscrollview.html#setHScrollBarMode">setHScrollBarMode</a>(QScrollView::Auto);
365 } else if (id == haoff_id) {
366 vp-&gt;<a href="qscrollview.html#setHScrollBarMode">setHScrollBarMode</a>(QScrollView::AlwaysOff);
367 } else if (id == haon_id) {
368 vp-&gt;<a href="qscrollview.html#setHScrollBarMode">setHScrollBarMode</a>(QScrollView::AlwaysOn);
369 } else if (id == corn_id) {
370<a name="x647"></a> bool corn = !vp-&gt;<a href="qscrollview.html#cornerWidget">cornerWidget</a>();
371<a name="x651"></a> vp-&gt;<a href="qscrollview.html#setCornerWidget">setCornerWidget</a>(corn ? corner : 0);
372 } else {
373 return; // Not for us to process.
374 }
375 setVPMenuItems();
376 }
377
378 void setVPMenuItems()
379 {
380<a name="x654"></a> QScrollView::ScrollBarMode vm = vp-&gt;<a href="qscrollview.html#vScrollBarMode">vScrollBarMode</a>();
381<a name="x636"></a> vp_options-&gt;<a href="qmenudata.html#setItemChecked">setItemChecked</a>( vauto_id, vm == QScrollView::Auto );
382 vp_options-&gt;<a href="qmenudata.html#setItemChecked">setItemChecked</a>( vaoff_id, vm == QScrollView::AlwaysOff );
383 vp_options-&gt;<a href="qmenudata.html#setItemChecked">setItemChecked</a>( vaon_id, vm == QScrollView::AlwaysOn );
384
385<a name="x649"></a> QScrollView::ScrollBarMode hm = vp-&gt;<a href="qscrollview.html#hScrollBarMode">hScrollBarMode</a>();
386 vp_options-&gt;<a href="qmenudata.html#setItemChecked">setItemChecked</a>( hauto_id, hm == QScrollView::Auto );
387 vp_options-&gt;<a href="qmenudata.html#setItemChecked">setItemChecked</a>( haoff_id, hm == QScrollView::AlwaysOff );
388 vp_options-&gt;<a href="qmenudata.html#setItemChecked">setItemChecked</a>( haon_id, hm == QScrollView::AlwaysOn );
389
390 vp_options-&gt;<a href="qmenudata.html#setItemChecked">setItemChecked</a>( corn_id, !!vp-&gt;<a href="qscrollview.html#cornerWidget">cornerWidget</a>() );
391 }
392
393 void doFMenuItem(int id)
394 {
395 if (id &amp; style_id) {
396 int sty;
397
398 if (id == style_id) {
399 sty = 0;
400 } else if (id &amp; QFrame::MShape) {
401<a name="x622"></a> sty = vp-&gt;<a href="qframe.html#frameStyle">frameStyle</a>()&amp;QFrame::MShadow;
402 sty = (sty ? sty : <a href="qframe.html">QFrame</a>::Plain) | (id&amp;QFrame::MShape);
403 } else {
404 sty = vp-&gt;<a href="qframe.html#frameStyle">frameStyle</a>()&amp;QFrame::MShape;
405 sty = (sty ? sty : <a href="qframe.html">QFrame</a>::Box) | (id&amp;QFrame::MShadow);
406 }
407<a name="x626"></a> vp-&gt;<a href="qframe.html#setFrameStyle">setFrameStyle</a>(sty);
408 } else if (id &amp; lw_id) {
409<a name="x627"></a> vp-&gt;<a href="qframe.html#setLineWidth">setLineWidth</a>(id&amp;~lw_id);
410 } else if (id &amp; mlw_id) {
411<a name="x629"></a> vp-&gt;<a href="qframe.html#setMidLineWidth">setMidLineWidth</a>(id&amp;~mlw_id);
412 } else {
413<a name="x628"></a> vp-&gt;<a href="qframe.html#setMargin">setMargin</a>(id&amp;~mw_id);
414 }
415
416<a name="x662"></a> vp-&gt;<a href="qwidget.html#update">update</a>();
417 setFMenuItems();
418 }
419
420 void setFMenuItems()
421 {
422 int sty = vp-&gt;<a href="qframe.html#frameStyle">frameStyle</a>();
423
424 f_options-&gt;<a href="qmenudata.html#setItemChecked">setItemChecked</a>( style_id, !sty );
425
426 for (int i=1; i &lt;= f_laststyle; i++) {
427<a name="x643"></a> int id = f_options-&gt;<a href="qpopupmenu.html#idAt">idAt</a>(i);
428 if (id &amp; QFrame::MShape)
429 f_options-&gt;<a href="qmenudata.html#setItemChecked">setItemChecked</a>( id,
430 ((id&amp;QFrame::MShape) == (sty&amp;QFrame::MShape)) );
431 else
432 f_options-&gt;<a href="qmenudata.html#setItemChecked">setItemChecked</a>( id,
433 ((id&amp;QFrame::MShadow) == (sty&amp;QFrame::MShadow)) );
434 }
435
436 for (int lw=1; lw&lt;=max_lw; lw++)
437<a name="x623"></a> lw_options-&gt;<a href="qmenudata.html#setItemChecked">setItemChecked</a>( lw_id|lw, vp-&gt;<a href="qframe.html#lineWidth">lineWidth</a>() == lw );
438
439 for (int mlw=0; mlw&lt;=max_mlw; mlw++)
440<a name="x625"></a> mlw_options-&gt;<a href="qmenudata.html#setItemChecked">setItemChecked</a>( mlw_id|mlw, vp-&gt;<a href="qframe.html#midLineWidth">midLineWidth</a>() == mlw );
441
442 for (int mw=0; mw&lt;=max_mw; mw++)
443<a name="x624"></a> mw_options-&gt;<a href="qmenudata.html#setItemChecked">setItemChecked</a>( mw_id|mw, vp-&gt;<a href="qframe.html#margin">margin</a>() == mw );
444 }
445
446private:
447 <a href="qscrollview.html">QScrollView</a>* vp;
448 <a href="qpopupmenu.html">QPopupMenu</a>* vp_options;
449 <a href="qpopupmenu.html">QPopupMenu</a>* f_options;
450 <a href="qpopupmenu.html">QPopupMenu</a>* lw_options;
451 <a href="qpopupmenu.html">QPopupMenu</a>* mlw_options;
452 <a href="qpopupmenu.html">QPopupMenu</a>* mw_options;
453 <a href="qsizegrip.html">QSizeGrip</a>* corner;
454
455 int vauto_id, vaoff_id, vaon_id,
456 hauto_id, haoff_id, haon_id,
457 corn_id;
458
459 int f_laststyle;
460};
461
462int main( int argc, char **argv )
463{
464 <a href="qapplication.html">QApplication</a> a( argc, argv );
465
466 ScrollViewExample ve1(1,0,"ve1");
467 ScrollViewExample ve2(2,0,"ve2");
468 ScrollViewExample ve3(3,0,"ve3");
469 ve1.<a href="qwidget.html#setCaption">setCaption</a>("Qt Example - Scrollviews");
470 ve1.<a href="qwidget.html#show">show</a>();
471 ve2.<a href="qwidget.html#setCaption">setCaption</a>("Qt Example - Scrollviews");
472 ve2.<a href="qwidget.html#show">show</a>();
473 ve3.<a href="qwidget.html#setCaption">setCaption</a>("Qt Example - Scrollviews");
474 ve3.<a href="qwidget.html#show">show</a>();
475
476 QObject::<a href="qobject.html#connect">connect</a>(qApp, SIGNAL(<a href="qapplication.html#lastWindowClosed">lastWindowClosed</a>()), qApp, SLOT(<a href="qapplication.html#quit">quit</a>()));
477
478 return a.<a href="qapplication.html#exec">exec</a>();
479}
480
481#include "scrollview.moc"
482</pre>
483
484<p>See also <a href="examples.html">Examples</a>.
485
486<!-- eof -->
487<p><address><hr><div align=center>
488<table width=100% cellspacing=0 border=0><tr>
489<td>Copyright &copy; 2007
490<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
491<td align=right><div align=right>Qt 3.3.8</div>
492</table></div></address></body>
493</html>
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