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-rw-r--r--examples/canvas/canvas.cpp747
1 files changed, 747 insertions, 0 deletions
diff --git a/examples/canvas/canvas.cpp b/examples/canvas/canvas.cpp
new file mode 100644
index 0000000..1f33949
--- /dev/null
+++ b/examples/canvas/canvas.cpp
@@ -0,0 +1,747 @@
+#include <qdatetime.h>
+#include <qmainwindow.h>
+#include <qstatusbar.h>
+#include <qmessagebox.h>
+#include <qmenubar.h>
+#include <qapplication.h>
+#include <qpainter.h>
+#include <qprinter.h>
+#include <qlabel.h>
+#include <qimage.h>
+#include <qprogressdialog.h>
+#include "canvas.h"
+
+#include <stdlib.h>
+
+// We use a global variable to save memory - all the brushes and pens in
+// the mesh are shared.
+static QBrush *tb = 0;
+static QPen *tp = 0;
+
+class EdgeItem;
+class NodeItem;
+
+class EdgeItem: public QCanvasLine
+{
+public:
+ EdgeItem( NodeItem*, NodeItem*, QCanvas *canvas );
+ void setFromPoint( int x, int y ) ;
+ void setToPoint( int x, int y );
+ static int count() { return c; }
+ void moveBy(double dx, double dy);
+private:
+ static int c;
+};
+
+static const int imageRTTI = 984376;
+
+
+class ImageItem: public QCanvasRectangle
+{
+public:
+ ImageItem( QImage img, QCanvas *canvas );
+ int rtti () const { return imageRTTI; }
+ bool hit( const QPoint&) const;
+protected:
+ void drawShape( QPainter & );
+private:
+ QImage image;
+ QPixmap pixmap;
+};
+
+
+ImageItem::ImageItem( QImage img, QCanvas *canvas )
+ : QCanvasRectangle( canvas ), image(img)
+{
+ setSize( image.width(), image.height() );
+
+#if !defined(Q_WS_QWS)
+ pixmap.convertFromImage(image, OrderedAlphaDither);
+#endif
+}
+
+
+void ImageItem::drawShape( QPainter &p )
+{
+// On Qt/Embedded, we can paint a QImage as fast as a QPixmap,
+// but on other platforms, we need to use a QPixmap.
+#if defined(Q_WS_QWS)
+ p.drawImage( int(x()), int(y()), image, 0, 0, -1, -1, OrderedAlphaDither );
+#else
+ p.drawPixmap( int(x()), int(y()), pixmap );
+#endif
+}
+
+bool ImageItem::hit( const QPoint &p ) const
+{
+ int ix = p.x()-int(x());
+ int iy = p.y()-int(y());
+ if ( !image.valid( ix , iy ) )
+ return FALSE;
+ QRgb pixel = image.pixel( ix, iy );
+ return qAlpha( pixel ) != 0;
+}
+
+class NodeItem: public QCanvasEllipse
+{
+public:
+ NodeItem( QCanvas *canvas );
+ ~NodeItem() {}
+
+ void addInEdge( EdgeItem *edge ) { inList.append( edge ); }
+ void addOutEdge( EdgeItem *edge ) { outList.append( edge ); }
+
+ void moveBy(double dx, double dy);
+
+ // QPoint center() { return boundingRect().center(); }
+private:
+ QPtrList<EdgeItem> inList;
+ QPtrList<EdgeItem> outList;
+};
+
+
+int EdgeItem::c = 0;
+
+
+void EdgeItem::moveBy(double, double)
+{
+ //nothing
+}
+
+EdgeItem::EdgeItem( NodeItem *from, NodeItem *to, QCanvas *canvas )
+ : QCanvasLine( canvas )
+{
+ c++;
+ setPen( *tp );
+ setBrush( *tb );
+ from->addOutEdge( this );
+ to->addInEdge( this );
+ setPoints( int(from->x()), int(from->y()), int(to->x()), int(to->y()) );
+ setZ( 127 );
+}
+
+void EdgeItem::setFromPoint( int x, int y )
+{
+ setPoints( x,y, endPoint().x(), endPoint().y() );
+}
+
+void EdgeItem::setToPoint( int x, int y )
+{
+ setPoints( startPoint().x(), startPoint().y(), x, y );
+}
+
+
+
+void NodeItem::moveBy(double dx, double dy)
+{
+ QCanvasEllipse::moveBy( dx, dy );
+
+ QPtrListIterator<EdgeItem> it1( inList );
+ EdgeItem *edge;
+ while (( edge = it1.current() )) {
+ ++it1;
+ edge->setToPoint( int(x()), int(y()) );
+ }
+ QPtrListIterator<EdgeItem> it2( outList );
+ while (( edge = it2.current() )) {
+ ++it2;
+ edge->setFromPoint( int(x()), int(y()) );
+ }
+}
+
+NodeItem::NodeItem( QCanvas *canvas )
+ : QCanvasEllipse( 6, 6, canvas )
+{
+ setPen( *tp );
+ setBrush( *tb );
+ setZ( 128 );
+}
+
+FigureEditor::FigureEditor(
+ QCanvas& c, QWidget* parent,
+ const char* name, WFlags f) :
+ QCanvasView(&c,parent,name,f)
+{
+}
+
+void FigureEditor::contentsMousePressEvent(QMouseEvent* e)
+{
+ QPoint p = inverseWorldMatrix().map(e->pos());
+ QCanvasItemList l=canvas()->collisions(p);
+ for (QCanvasItemList::Iterator it=l.begin(); it!=l.end(); ++it) {
+ if ( (*it)->rtti() == imageRTTI ) {
+ ImageItem *item= (ImageItem*)(*it);
+ if ( !item->hit( p ) )
+ continue;
+ }
+ moving = *it;
+ moving_start = p;
+ return;
+ }
+ moving = 0;
+}
+
+void FigureEditor::clear()
+{
+ QCanvasItemList list = canvas()->allItems();
+ QCanvasItemList::Iterator it = list.begin();
+ for (; it != list.end(); ++it) {
+ if ( *it )
+ delete *it;
+ }
+}
+
+void FigureEditor::contentsMouseMoveEvent(QMouseEvent* e)
+{
+ if ( moving ) {
+ QPoint p = inverseWorldMatrix().map(e->pos());
+ moving->moveBy(p.x() - moving_start.x(),
+ p.y() - moving_start.y());
+ moving_start = p;
+ canvas()->update();
+ }
+}
+
+
+
+BouncyLogo::BouncyLogo(QCanvas* canvas) :
+ QCanvasSprite(0,canvas)
+{
+ static QCanvasPixmapArray logo("qt-trans.xpm");
+ setSequence(&logo);
+ setAnimated(TRUE);
+ initPos();
+}
+
+
+const int logo_rtti = 1234;
+
+int BouncyLogo::rtti() const
+{
+ return logo_rtti;
+}
+
+void BouncyLogo::initPos()
+{
+ initSpeed();
+ int trial=1000;
+ do {
+ move(rand()%canvas()->width(),rand()%canvas()->height());
+ advance(0);
+ } while (trial-- && xVelocity()==0.0 && yVelocity()==0.0);
+}
+
+void BouncyLogo::initSpeed()
+{
+ const double speed = 4.0;
+ double d = (double)(rand()%1024) / 1024.0;
+ setVelocity( d*speed*2-speed, (1-d)*speed*2-speed );
+}
+
+void BouncyLogo::advance(int stage)
+{
+ switch ( stage ) {
+ case 0: {
+ double vx = xVelocity();
+ double vy = yVelocity();
+
+ if ( vx == 0.0 && vy == 0.0 ) {
+ // stopped last turn
+ initSpeed();
+ vx = xVelocity();
+ vy = yVelocity();
+ }
+
+ double nx = x() + vx;
+ double ny = y() + vy;
+
+ if ( nx < 0 || nx >= canvas()->width() )
+ vx = -vx;
+ if ( ny < 0 || ny >= canvas()->height() )
+ vy = -vy;
+
+ for (int bounce=0; bounce<4; bounce++) {
+ QCanvasItemList l=collisions(FALSE);
+ for (QCanvasItemList::Iterator it=l.begin(); it!=l.end(); ++it) {
+ QCanvasItem *hit = *it;
+ if ( hit->rtti()==logo_rtti && hit->collidesWith(this) ) {
+ switch ( bounce ) {
+ case 0:
+ vx = -vx;
+ break;
+ case 1:
+ vy = -vy;
+ vx = -vx;
+ break;
+ case 2:
+ vx = -vx;
+ break;
+ case 3:
+ // Stop for this turn
+ vx = 0;
+ vy = 0;
+ break;
+ }
+ setVelocity(vx,vy);
+ break;
+ }
+ }
+ }
+
+ if ( x()+vx < 0 || x()+vx >= canvas()->width() )
+ vx = 0;
+ if ( y()+vy < 0 || y()+vy >= canvas()->height() )
+ vy = 0;
+
+ setVelocity(vx,vy);
+ } break;
+ case 1:
+ QCanvasItem::advance(stage);
+ break;
+ }
+}
+
+static uint mainCount = 0;
+static QImage *butterflyimg;
+static QImage *logoimg;
+
+Main::Main(QCanvas& c, QWidget* parent, const char* name, WFlags f) :
+ QMainWindow(parent,name,f),
+ canvas(c)
+{
+ editor = new FigureEditor(canvas,this);
+ QMenuBar* menu = menuBar();
+
+ QPopupMenu* file = new QPopupMenu( menu );
+ file->insertItem("&Fill canvas", this, SLOT(init()), CTRL+Key_F);
+ file->insertItem("&Erase canvas", this, SLOT(clear()), CTRL+Key_E);
+ file->insertItem("&New view", this, SLOT(newView()), CTRL+Key_N);
+ file->insertSeparator();
+ file->insertItem("&Print...", this, SLOT(print()), CTRL+Key_P);
+ file->insertSeparator();
+ file->insertItem("E&xit", qApp, SLOT(quit()), CTRL+Key_Q);
+ menu->insertItem("&File", file);
+
+ QPopupMenu* edit = new QPopupMenu( menu );
+ edit->insertItem("Add &Circle", this, SLOT(addCircle()), ALT+Key_C);
+ edit->insertItem("Add &Hexagon", this, SLOT(addHexagon()), ALT+Key_H);
+ edit->insertItem("Add &Polygon", this, SLOT(addPolygon()), ALT+Key_P);
+ edit->insertItem("Add Spl&ine", this, SLOT(addSpline()), ALT+Key_I);
+ edit->insertItem("Add &Text", this, SLOT(addText()), ALT+Key_T);
+ edit->insertItem("Add &Line", this, SLOT(addLine()), ALT+Key_L);
+ edit->insertItem("Add &Rectangle", this, SLOT(addRectangle()), ALT+Key_R);
+ edit->insertItem("Add &Sprite", this, SLOT(addSprite()), ALT+Key_S);
+ edit->insertItem("Create &Mesh", this, SLOT(addMesh()), ALT+Key_M );
+ edit->insertItem("Add &Alpha-blended image", this, SLOT(addButterfly()), ALT+Key_A);
+ menu->insertItem("&Edit", edit);
+
+ QPopupMenu* view = new QPopupMenu( menu );
+ view->insertItem("&Enlarge", this, SLOT(enlarge()), SHIFT+CTRL+Key_Plus);
+ view->insertItem("Shr&ink", this, SLOT(shrink()), SHIFT+CTRL+Key_Minus);
+ view->insertSeparator();
+ view->insertItem("&Rotate clockwise", this, SLOT(rotateClockwise()), CTRL+Key_PageDown);
+ view->insertItem("Rotate &counterclockwise", this, SLOT(rotateCounterClockwise()), CTRL+Key_PageUp);
+ view->insertItem("&Zoom in", this, SLOT(zoomIn()), CTRL+Key_Plus);
+ view->insertItem("Zoom &out", this, SLOT(zoomOut()), CTRL+Key_Minus);
+ view->insertItem("Translate left", this, SLOT(moveL()), CTRL+Key_Left);
+ view->insertItem("Translate right", this, SLOT(moveR()), CTRL+Key_Right);
+ view->insertItem("Translate up", this, SLOT(moveU()), CTRL+Key_Up);
+ view->insertItem("Translate down", this, SLOT(moveD()), CTRL+Key_Down);
+ view->insertItem("&Mirror", this, SLOT(mirror()), CTRL+Key_Home);
+ menu->insertItem("&View", view);
+
+ options = new QPopupMenu( menu );
+ dbf_id = options->insertItem("Double buffer", this, SLOT(toggleDoubleBuffer()));
+ options->setItemChecked(dbf_id, TRUE);
+ menu->insertItem("&Options",options);
+
+ menu->insertSeparator();
+
+ QPopupMenu* help = new QPopupMenu( menu );
+ help->insertItem("&About", this, SLOT(help()), Key_F1);
+ help->setItemChecked(dbf_id, TRUE);
+ menu->insertItem("&Help",help);
+
+ statusBar();
+
+ setCentralWidget(editor);
+
+ printer = 0;
+
+ init();
+}
+
+void Main::init()
+{
+ clear();
+
+ static int r=24;
+ srand(++r);
+
+ mainCount++;
+ butterflyimg = 0;
+ logoimg = 0;
+
+ int i;
+ for ( i=0; i<canvas.width() / 56; i++) {
+ addButterfly();
+ }
+ for ( i=0; i<canvas.width() / 85; i++) {
+ addHexagon();
+ }
+ for ( i=0; i<canvas.width() / 128; i++) {
+ addLogo();
+ }
+}
+
+Main::~Main()
+{
+ delete printer;
+ if ( !--mainCount ) {
+ delete[] butterflyimg;
+ butterflyimg = 0;
+ delete[] logoimg;
+ logoimg = 0;
+ }
+}
+
+void Main::newView()
+{
+ // Open a new view... have it delete when closed.
+ Main *m = new Main(canvas, 0, 0, WDestructiveClose);
+ qApp->setMainWidget(m);
+ m->show();
+ qApp->setMainWidget(0);
+}
+
+void Main::clear()
+{
+ editor->clear();
+}
+
+void Main::help()
+{
+ static QMessageBox* about = new QMessageBox( "Qt Canvas Example",
+ "<h3>The QCanvas classes example</h3>"
+ "<ul>"
+ "<li> Press ALT-S for some sprites."
+ "<li> Press ALT-C for some circles."
+ "<li> Press ALT-L for some lines."
+ "<li> Drag the objects around."
+ "<li> Read the code!"
+ "</ul>", QMessageBox::Information, 1, 0, 0, this, 0, FALSE );
+ about->setButtonText( 1, "Dismiss" );
+ about->show();
+}
+
+void Main::aboutQt()
+{
+ QMessageBox::aboutQt( this, "Qt Canvas Example" );
+}
+
+void Main::toggleDoubleBuffer()
+{
+ bool s = !options->isItemChecked(dbf_id);
+ options->setItemChecked(dbf_id,s);
+ canvas.setDoubleBuffering(s);
+}
+
+void Main::enlarge()
+{
+ canvas.resize(canvas.width()*4/3, canvas.height()*4/3);
+}
+
+void Main::shrink()
+{
+ canvas.resize(canvas.width()*3/4, canvas.height()*3/4);
+}
+
+void Main::rotateClockwise()
+{
+ QWMatrix m = editor->worldMatrix();
+ m.rotate( 22.5 );
+ editor->setWorldMatrix( m );
+}
+
+void Main::rotateCounterClockwise()
+{
+ QWMatrix m = editor->worldMatrix();
+ m.rotate( -22.5 );
+ editor->setWorldMatrix( m );
+}
+
+void Main::zoomIn()
+{
+ QWMatrix m = editor->worldMatrix();
+ m.scale( 2.0, 2.0 );
+ editor->setWorldMatrix( m );
+}
+
+void Main::zoomOut()
+{
+ QWMatrix m = editor->worldMatrix();
+ m.scale( 0.5, 0.5 );
+ editor->setWorldMatrix( m );
+}
+
+void Main::mirror()
+{
+ QWMatrix m = editor->worldMatrix();
+ m.scale( -1, 1 );
+ editor->setWorldMatrix( m );
+}
+
+void Main::moveL()
+{
+ QWMatrix m = editor->worldMatrix();
+ m.translate( -16, 0 );
+ editor->setWorldMatrix( m );
+}
+
+void Main::moveR()
+{
+ QWMatrix m = editor->worldMatrix();
+ m.translate( +16, 0 );
+ editor->setWorldMatrix( m );
+}
+
+void Main::moveU()
+{
+ QWMatrix m = editor->worldMatrix();
+ m.translate( 0, -16 );
+ editor->setWorldMatrix( m );
+}
+
+void Main::moveD()
+{
+ QWMatrix m = editor->worldMatrix();
+ m.translate( 0, +16 );
+ editor->setWorldMatrix( m );
+}
+
+void Main::print()
+{
+ if ( !printer ) printer = new QPrinter;
+ if ( printer->setup(this) ) {
+ QPainter pp(printer);
+ canvas.drawArea(QRect(0,0,canvas.width(),canvas.height()),&pp,FALSE);
+ }
+}
+
+
+void Main::addSprite()
+{
+ QCanvasItem* i = new BouncyLogo(&canvas);
+ i->setZ(rand()%256);
+ i->show();
+}
+
+QString butterfly_fn;
+QString logo_fn;
+
+
+void Main::addButterfly()
+{
+ if ( butterfly_fn.isEmpty() )
+ return;
+ if ( !butterflyimg ) {
+ butterflyimg = new QImage[4];
+ butterflyimg[0].load( butterfly_fn );
+ butterflyimg[1] = butterflyimg[0].smoothScale( int(butterflyimg[0].width()*0.75),
+ int(butterflyimg[0].height()*0.75) );
+ butterflyimg[2] = butterflyimg[0].smoothScale( int(butterflyimg[0].width()*0.5),
+ int(butterflyimg[0].height()*0.5) );
+ butterflyimg[3] = butterflyimg[0].smoothScale( int(butterflyimg[0].width()*0.25),
+ int(butterflyimg[0].height()*0.25) );
+ }
+ QCanvasPolygonalItem* i = new ImageItem(butterflyimg[rand()%4],&canvas);
+ i->move(rand()%(canvas.width()-butterflyimg->width()),
+ rand()%(canvas.height()-butterflyimg->height()));
+ i->setZ(rand()%256+250);
+ i->show();
+}
+
+void Main::addLogo()
+{
+ if ( logo_fn.isEmpty() )
+ return;
+ if ( !logoimg ) {
+ logoimg = new QImage[4];
+ logoimg[0].load( logo_fn );
+ logoimg[1] = logoimg[0].smoothScale( int(logoimg[0].width()*0.75),
+ int(logoimg[0].height()*0.75) );
+ logoimg[2] = logoimg[0].smoothScale( int(logoimg[0].width()*0.5),
+ int(logoimg[0].height()*0.5) );
+ logoimg[3] = logoimg[0].smoothScale( int(logoimg[0].width()*0.25),
+ int(logoimg[0].height()*0.25) );
+ }
+ QCanvasPolygonalItem* i = new ImageItem(logoimg[rand()%4],&canvas);
+ i->move(rand()%(canvas.width()-logoimg->width()),
+ rand()%(canvas.height()-logoimg->width()));
+ i->setZ(rand()%256+256);
+ i->show();
+}
+
+
+
+void Main::addCircle()
+{
+ QCanvasPolygonalItem* i = new QCanvasEllipse(50,50,&canvas);
+ i->setBrush( QColor(rand()%32*8,rand()%32*8,rand()%32*8) );
+ i->move(rand()%canvas.width(),rand()%canvas.height());
+ i->setZ(rand()%256);
+ i->show();
+}
+
+void Main::addHexagon()
+{
+ QCanvasPolygon* i = new QCanvasPolygon(&canvas);
+ const int size = canvas.width() / 25;
+ QPointArray pa(6);
+ pa[0] = QPoint(2*size,0);
+ pa[1] = QPoint(size,-size*173/100);
+ pa[2] = QPoint(-size,-size*173/100);
+ pa[3] = QPoint(-2*size,0);
+ pa[4] = QPoint(-size,size*173/100);
+ pa[5] = QPoint(size,size*173/100);
+ i->setPoints(pa);
+ i->setBrush( QColor(rand()%32*8,rand()%32*8,rand()%32*8) );
+ i->move(rand()%canvas.width(),rand()%canvas.height());
+ i->setZ(rand()%256);
+ i->show();
+}
+
+void Main::addPolygon()
+{
+ QCanvasPolygon* i = new QCanvasPolygon(&canvas);
+ const int size = canvas.width()/2;
+ QPointArray pa(6);
+ pa[0] = QPoint(0,0);
+ pa[1] = QPoint(size,size/5);
+ pa[2] = QPoint(size*4/5,size);
+ pa[3] = QPoint(size/6,size*5/4);
+ pa[4] = QPoint(size*3/4,size*3/4);
+ pa[5] = QPoint(size*3/4,size/4);
+ i->setPoints(pa);
+ i->setBrush( QColor(rand()%32*8,rand()%32*8,rand()%32*8) );
+ i->move(rand()%canvas.width(),rand()%canvas.height());
+ i->setZ(rand()%256);
+ i->show();
+}
+
+void Main::addSpline()
+{
+ QCanvasSpline* i = new QCanvasSpline(&canvas);
+ const int size = canvas.width()/6;
+ QPointArray pa(12);
+ pa[0] = QPoint(0,0);
+ pa[1] = QPoint(size/2,0);
+ pa[2] = QPoint(size,size/2);
+ pa[3] = QPoint(size,size);
+ pa[4] = QPoint(size,size*3/2);
+ pa[5] = QPoint(size/2,size*2);
+ pa[6] = QPoint(0,size*2);
+ pa[7] = QPoint(-size/2,size*2);
+ pa[8] = QPoint(size/4,size*3/2);
+ pa[9] = QPoint(0,size);
+ pa[10]= QPoint(-size/4,size/2);
+ pa[11]= QPoint(-size/2,0);
+ i->setControlPoints(pa);
+ i->setBrush( QColor(rand()%32*8,rand()%32*8,rand()%32*8) );
+ i->move(rand()%canvas.width(),rand()%canvas.height());
+ i->setZ(rand()%256);
+ i->show();
+}
+
+void Main::addText()
+{
+ QCanvasText* i = new QCanvasText(&canvas);
+ i->setText("QCanvasText");
+ i->move(rand()%canvas.width(),rand()%canvas.height());
+ i->setZ(rand()%256);
+ i->show();
+}
+
+void Main::addLine()
+{
+ QCanvasLine* i = new QCanvasLine(&canvas);
+ i->setPoints( rand()%canvas.width(), rand()%canvas.height(),
+ rand()%canvas.width(), rand()%canvas.height() );
+ i->setPen( QPen(QColor(rand()%32*8,rand()%32*8,rand()%32*8), 6) );
+ i->setZ(rand()%256);
+ i->show();
+}
+
+void Main::addMesh()
+{
+ int x0 = 0;
+ int y0 = 0;
+
+ if ( !tb ) tb = new QBrush( Qt::red );
+ if ( !tp ) tp = new QPen( Qt::black );
+
+ int nodecount = 0;
+
+ int w = canvas.width();
+ int h = canvas.height();
+
+ const int dist = 30;
+ int rows = h / dist;
+ int cols = w / dist;
+
+#ifndef QT_NO_PROGRESSDIALOG
+ QProgressDialog progress( "Creating mesh...", "Abort", rows,
+ this, "progress", TRUE );
+#endif
+
+ QMemArray<NodeItem*> lastRow(cols);
+ for ( int j = 0; j < rows; j++ ) {
+ int n = j%2 ? cols-1 : cols;
+ NodeItem *prev = 0;
+ for ( int i = 0; i < n; i++ ) {
+ NodeItem *el = new NodeItem( &canvas );
+ nodecount++;
+ int r = rand();
+ int xrand = r %20;
+ int yrand = (r/20) %20;
+ el->move( xrand + x0 + i*dist + (j%2 ? dist/2 : 0 ),
+ yrand + y0 + j*dist );
+
+ if ( j > 0 ) {
+ if ( i < cols-1 )
+ (new EdgeItem( lastRow[i], el, &canvas ))->show();
+ if ( j%2 )
+ (new EdgeItem( lastRow[i+1], el, &canvas ))->show();
+ else if ( i > 0 )
+ (new EdgeItem( lastRow[i-1], el, &canvas ))->show();
+ }
+ if ( prev ) {
+ (new EdgeItem( prev, el, &canvas ))->show();
+ }
+ if ( i > 0 ) lastRow[i-1] = prev;
+ prev = el;
+ el->show();
+ }
+ lastRow[n-1]=prev;
+#ifndef QT_NO_PROGRESSDIALOG
+ progress.setProgress( j );
+ if ( progress.wasCancelled() )
+ break;
+#endif
+ }
+#ifndef QT_NO_PROGRESSDIALOG
+ progress.setProgress( rows );
+#endif
+ // qDebug( "%d nodes, %d edges", nodecount, EdgeItem::count() );
+}
+
+void Main::addRectangle()
+{
+ QCanvasPolygonalItem *i = new QCanvasRectangle( rand()%canvas.width(),rand()%canvas.height(),
+ canvas.width()/5,canvas.width()/5,&canvas);
+ int z = rand()%256;
+ i->setBrush( QColor(z,z,z) );
+ i->setPen( QPen(QColor(rand()%32*8,rand()%32*8,rand()%32*8), 6) );
+ i->setZ(z);
+ i->show();
+}
generated by cgit v1.2.1 (git 2.18.0) at 2024-12-24 16:47:32 +0000