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-rw-r--r--examples/scrollview/scrollview.cpp441
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diff --git a/examples/scrollview/scrollview.cpp b/examples/scrollview/scrollview.cpp
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+/****************************************************************************
+**
+** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
+**
+** This file is part of an example program for Qt. This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+#include <qscrollview.h>
+#include <qapplication.h>
+#include <qmenubar.h>
+#include <qpopupmenu.h>
+#include <qpushbutton.h>
+#include <qpainter.h>
+#include <qpixmap.h>
+#include <qmessagebox.h>
+#include <qlayout.h>
+#include <qlabel.h>
+#include <qmultilineedit.h>
+#include <qsizegrip.h>
+#include <stdlib.h>
+
+
+static const int style_id = 0x1000;
+static const int lw_id = 0x2000;
+static const int mlw_id = 0x4000;
+static const int mw_id = 0x8000;
+static const int max_lw = 16;
+static const int max_mlw = 5;
+static const int max_mw = 10;
+
+
+class BigShrinker : public QFrame {
+ Q_OBJECT
+public:
+ BigShrinker(QWidget* parent) :
+ QFrame(parent)
+ {
+ setFrameStyle(QFrame::Box|QFrame::Sunken);
+ int h=35;
+ int b=0;
+ for (int y=0; y<2000-h; y+=h+10) {
+ if (y == 0) {
+ QButton* q=new QPushButton("Quit", this);
+ connect(q, SIGNAL(clicked()), qApp, SLOT(quit()));
+ } else {
+ QString str;
+ if ( b > 0 ) {
+ str.sprintf("Button %d", b++);
+ } else {
+ str = "I'm shrinking!";
+ ++b;
+ }
+ (new QPushButton(str, this))->move(y/2,y);
+ }
+ }
+ resize(1000,2000);
+
+ startTimer(250);
+ }
+
+ void timerEvent(QTimerEvent*)
+ {
+ int w=width();
+ int h=height();
+ if ( w > 50 ) w -= 1;
+ if ( h > 50 ) h -= 2;
+ resize(w,h);
+ }
+
+ void mouseReleaseEvent(QMouseEvent* e)
+ {
+ emit clicked(e->x(), e->y());
+ }
+
+signals:
+ void clicked(int,int);
+};
+
+class BigMatrix : public QScrollView {
+ QMultiLineEdit *dragging;
+public:
+ BigMatrix(QWidget* parent) :
+ QScrollView(parent,"matrix", WStaticContents),
+ bg("bg.ppm")
+ {
+ bg.load("bg.ppm");
+ resizeContents(400000,300000);
+
+ dragging = 0;
+ }
+
+ void viewportMousePressEvent(QMouseEvent* e)
+ {
+ int x, y;
+ viewportToContents( e->x(), e->y(), x, y );
+ dragging = new QMultiLineEdit(viewport(),"Another");
+ dragging->setText("Thanks!");
+ dragging->resize(100,100);
+ addChild(dragging, x, y);
+ showChild(dragging);
+ }
+
+ void viewportMouseReleaseEvent(QMouseEvent*)
+ {
+ dragging = 0;
+ }
+
+ void viewportMouseMoveEvent(QMouseEvent* e)
+ {
+ if ( dragging ) {
+ int mx, my;
+ viewportToContents( e->x(), e->y(), mx, my );
+ int cx = childX(dragging);
+ int cy = childY(dragging);
+ int w = mx - cx + 1;
+ int h = my - cy + 1;
+ QString msg;
+ msg.sprintf("at (%d,%d) %d by %d",cx,cy,w,h);
+ dragging->setText(msg);
+ dragging->resize(w,h);
+ }
+ }
+
+protected:
+ void drawContents(QPainter* p, int cx, int cy, int cw, int ch)
+ {
+ // The Background
+ if ( !bg.isNull() ) {
+ int rowheight=bg.height();
+ int toprow=cy/rowheight;
+ int bottomrow=(cy+ch+rowheight-1)/rowheight;
+ int colwidth=bg.width();
+ int leftcol=cx/colwidth;
+ int rightcol=(cx+cw+colwidth-1)/colwidth;
+ for (int r=toprow; r<=bottomrow; r++) {
+ int py=r*rowheight;
+ for (int c=leftcol; c<=rightcol; c++) {
+ int px=c*colwidth;
+ p->drawPixmap(px, py, bg);
+ }
+ }
+ } else {
+ p->fillRect(cx, cy, cw, ch, QColor(240,222,208));
+ }
+
+ // The Numbers
+ {
+ QFontMetrics fm=p->fontMetrics();
+ int rowheight=fm.lineSpacing();
+ int toprow=cy/rowheight;
+ int bottomrow=(cy+ch+rowheight-1)/rowheight;
+ int colwidth=fm.width("00000,000000 ")+3;
+ int leftcol=cx/colwidth;
+ int rightcol=(cx+cw+colwidth-1)/colwidth;
+ QString str;
+ for (int r=toprow; r<=bottomrow; r++) {
+ int py=r*rowheight;
+ for (int c=leftcol; c<=rightcol; c++) {
+ int px=c*colwidth;
+ str.sprintf("%d,%d",c,r);
+ p->drawText(px+3, py+fm.ascent(), str);
+ }
+ }
+
+ // The Big Hint
+ if (leftcol<10 && toprow<5) {
+ p->setFont(QFont("Charter",30));
+ p->setPen(red);
+ QString text;
+ text.sprintf("HINT: Look at %d,%d",215000/colwidth,115000/rowheight);
+ p->drawText(100,50,text);
+ }
+ }
+
+ // The Big X
+ {
+ if (cx+cw>200000 && cy+ch>100000 && cx<230000 && cy<130000) {
+ // Note that some X server cannot even handle co-ordinates
+ // beyond about 4000, so you might not see this.
+ p->drawLine(200000,100000,229999,129999);
+ p->drawLine(229999,100000,200000,129999);
+
+ // X marks the spot!
+ p->setFont(QFont("Charter",100));
+ p->setPen(blue);
+ p->drawText(215000-500,115000-100,1000,200,AlignCenter,"YOU WIN!!!!!");
+ }
+ }
+ }
+
+private:
+ QPixmap bg;
+};
+
+class ScrollViewExample : public QWidget {
+ Q_OBJECT
+
+public:
+ ScrollViewExample(int technique, QWidget* parent=0, const char* name=0) :
+ QWidget(parent,name)
+ {
+ QMenuBar* menubar = new QMenuBar(this);
+ Q_CHECK_PTR( menubar );
+
+ QPopupMenu* file = new QPopupMenu( menubar );
+ Q_CHECK_PTR( file );
+ menubar->insertItem( "&File", file );
+ file->insertItem( "Quit", qApp, SLOT(quit()) );
+
+ vp_options = new QPopupMenu( menubar );
+ Q_CHECK_PTR( vp_options );
+ vp_options->setCheckable( TRUE );
+ menubar->insertItem( "&ScrollView", vp_options );
+ connect( vp_options, SIGNAL(activated(int)),
+ this, SLOT(doVPMenuItem(int)) );
+
+ vauto_id = vp_options->insertItem( "Vertical Auto" );
+ vaoff_id = vp_options->insertItem( "Vertical AlwaysOff" );
+ vaon_id = vp_options->insertItem( "Vertical AlwaysOn" );
+ vp_options->insertSeparator();
+ hauto_id = vp_options->insertItem( "Horizontal Auto" );
+ haoff_id = vp_options->insertItem( "Horizontal AlwaysOff" );
+ haon_id = vp_options->insertItem( "Horizontal AlwaysOn" );
+ vp_options->insertSeparator();
+ corn_id = vp_options->insertItem( "cornerWidget" );
+
+ if (technique == 1) {
+ vp = new QScrollView(this);
+ BigShrinker *bs = new BigShrinker(0);//(vp->viewport());
+ vp->addChild(bs);
+ bs->setAcceptDrops(TRUE);
+ QObject::connect(bs, SIGNAL(clicked(int,int)),
+ vp, SLOT(center(int,int)));
+ } else {
+ vp = new BigMatrix(this);
+ if ( technique == 3 )
+ vp->enableClipper(TRUE);
+ srand(1);
+ for (int i=0; i<30; i++) {
+ QMultiLineEdit *l = new QMultiLineEdit(vp->viewport(),"First");
+ l->setText("Drag out more of these.");
+ l->resize(100,100);
+ vp->addChild(l, rand()%800, rand()%10000);
+ }
+ vp->viewport()->setBackgroundMode(NoBackground);
+ }
+
+ f_options = new QPopupMenu( menubar );
+ Q_CHECK_PTR( f_options );
+ f_options->setCheckable( TRUE );
+ menubar->insertItem( "F&rame", f_options );
+ connect( f_options, SIGNAL(activated(int)),
+ this, SLOT(doFMenuItem(int)) );
+
+ f_options->insertItem( "No Frame", style_id );
+ f_options->insertItem( "Box", style_id|QFrame::Box );
+ f_options->insertItem( "Panel", style_id|QFrame::Panel );
+ f_options->insertItem( "WinPanel", style_id|QFrame::WinPanel );
+ f_options->insertSeparator();
+ f_options->insertItem( "Plain", style_id|QFrame::Plain );
+ f_options->insertItem( "Raised", style_id|QFrame::Raised );
+ f_laststyle = f_options->indexOf(
+ f_options->insertItem( "Sunken", style_id|QFrame::Sunken ));
+ f_options->insertSeparator();
+ lw_options = new QPopupMenu( menubar );
+ Q_CHECK_PTR( lw_options );
+ lw_options->setCheckable( TRUE );
+ for (int lw = 1; lw <= max_lw; lw++) {
+ QString str;
+ str.sprintf("%d Pixels", lw);
+ lw_options->insertItem( str, lw_id | lw );
+ }
+ f_options->insertItem( "Line Width", lw_options );
+ connect( lw_options, SIGNAL(activated(int)),
+ this, SLOT(doFMenuItem(int)) );
+ mlw_options = new QPopupMenu( menubar );
+ Q_CHECK_PTR( mlw_options );
+ mlw_options->setCheckable( TRUE );
+ for (int mlw = 0; mlw <= max_mlw; mlw++) {
+ QString str;
+ str.sprintf("%d Pixels", mlw);
+ mlw_options->insertItem( str, mlw_id | mlw );
+ }
+ f_options->insertItem( "Midline Width", mlw_options );
+ connect( mlw_options, SIGNAL(activated(int)),
+ this, SLOT(doFMenuItem(int)) );
+ mw_options = new QPopupMenu( menubar );
+ Q_CHECK_PTR( mw_options );
+ mw_options->setCheckable( TRUE );
+ for (int mw = 0; mw <= max_mw; mw++) {
+ QString str;
+ str.sprintf("%d Pixels", mw);
+ mw_options->insertItem( str, mw_id | mw );
+ }
+ f_options->insertItem( "Margin Width", mw_options );
+ connect( mw_options, SIGNAL(activated(int)),
+ this, SLOT(doFMenuItem(int)) );
+
+ setVPMenuItems();
+ setFMenuItems();
+
+ QVBoxLayout* vbox = new QVBoxLayout(this);
+ vbox->setMenuBar(menubar);
+ menubar->setSeparator(QMenuBar::InWindowsStyle);
+ vbox->addWidget(vp);
+ vbox->activate();
+
+ corner = new QSizeGrip(this);
+ corner->hide();
+ }
+
+private slots:
+ void doVPMenuItem(int id)
+ {
+ if (id == vauto_id ) {
+ vp->setVScrollBarMode(QScrollView::Auto);
+ } else if (id == vaoff_id) {
+ vp->setVScrollBarMode(QScrollView::AlwaysOff);
+ } else if (id == vaon_id) {
+ vp->setVScrollBarMode(QScrollView::AlwaysOn);
+ } else if (id == hauto_id) {
+ vp->setHScrollBarMode(QScrollView::Auto);
+ } else if (id == haoff_id) {
+ vp->setHScrollBarMode(QScrollView::AlwaysOff);
+ } else if (id == haon_id) {
+ vp->setHScrollBarMode(QScrollView::AlwaysOn);
+ } else if (id == corn_id) {
+ bool corn = !vp->cornerWidget();
+ vp->setCornerWidget(corn ? corner : 0);
+ } else {
+ return; // Not for us to process.
+ }
+ setVPMenuItems();
+ }
+
+ void setVPMenuItems()
+ {
+ QScrollView::ScrollBarMode vm = vp->vScrollBarMode();
+ vp_options->setItemChecked( vauto_id, vm == QScrollView::Auto );
+ vp_options->setItemChecked( vaoff_id, vm == QScrollView::AlwaysOff );
+ vp_options->setItemChecked( vaon_id, vm == QScrollView::AlwaysOn );
+
+ QScrollView::ScrollBarMode hm = vp->hScrollBarMode();
+ vp_options->setItemChecked( hauto_id, hm == QScrollView::Auto );
+ vp_options->setItemChecked( haoff_id, hm == QScrollView::AlwaysOff );
+ vp_options->setItemChecked( haon_id, hm == QScrollView::AlwaysOn );
+
+ vp_options->setItemChecked( corn_id, !!vp->cornerWidget() );
+ }
+
+ void doFMenuItem(int id)
+ {
+ if (id & style_id) {
+ int sty;
+
+ if (id == style_id) {
+ sty = 0;
+ } else if (id & QFrame::MShape) {
+ sty = vp->frameStyle()&QFrame::MShadow;
+ sty = (sty ? sty : QFrame::Plain) | (id&QFrame::MShape);
+ } else {
+ sty = vp->frameStyle()&QFrame::MShape;
+ sty = (sty ? sty : QFrame::Box) | (id&QFrame::MShadow);
+ }
+ vp->setFrameStyle(sty);
+ } else if (id & lw_id) {
+ vp->setLineWidth(id&~lw_id);
+ } else if (id & mlw_id) {
+ vp->setMidLineWidth(id&~mlw_id);
+ } else {
+ vp->setMargin(id&~mw_id);
+ }
+
+ vp->update();
+ setFMenuItems();
+ }
+
+ void setFMenuItems()
+ {
+ int sty = vp->frameStyle();
+
+ f_options->setItemChecked( style_id, !sty );
+
+ for (int i=1; i <= f_laststyle; i++) {
+ int id = f_options->idAt(i);
+ if (id & QFrame::MShape)
+ f_options->setItemChecked( id,
+ ((id&QFrame::MShape) == (sty&QFrame::MShape)) );
+ else
+ f_options->setItemChecked( id,
+ ((id&QFrame::MShadow) == (sty&QFrame::MShadow)) );
+ }
+
+ for (int lw=1; lw<=max_lw; lw++)
+ lw_options->setItemChecked( lw_id|lw, vp->lineWidth() == lw );
+
+ for (int mlw=0; mlw<=max_mlw; mlw++)
+ mlw_options->setItemChecked( mlw_id|mlw, vp->midLineWidth() == mlw );
+
+ for (int mw=0; mw<=max_mw; mw++)
+ mw_options->setItemChecked( mw_id|mw, vp->margin() == mw );
+ }
+
+private:
+ QScrollView* vp;
+ QPopupMenu* vp_options;
+ QPopupMenu* f_options;
+ QPopupMenu* lw_options;
+ QPopupMenu* mlw_options;
+ QPopupMenu* mw_options;
+ QSizeGrip* corner;
+
+ int vauto_id, vaoff_id, vaon_id,
+ hauto_id, haoff_id, haon_id,
+ corn_id;
+
+ int f_laststyle;
+};
+
+int main( int argc, char **argv )
+{
+ QApplication a( argc, argv );
+
+ ScrollViewExample ve1(1,0,"ve1");
+ ScrollViewExample ve2(2,0,"ve2");
+ ScrollViewExample ve3(3,0,"ve3");
+ ve1.setCaption("Qt Example - Scrollviews");
+ ve1.show();
+ ve2.setCaption("Qt Example - Scrollviews");
+ ve2.show();
+ ve3.setCaption("Qt Example - Scrollviews");
+ ve3.show();
+
+ QObject::connect(qApp, SIGNAL(lastWindowClosed()), qApp, SLOT(quit()));
+
+ return a.exec();
+}
+
+#include "scrollview.moc"
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