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