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- /****************************************************************************
- ** $Id: qt/scrollview.cpp 3.0.0 edited Jul 30 23:08 $
- **
- ** Copyright (C) 1992-2000 Trolltech AS. 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( "&Frame", 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"
-