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390 lines
9.3 KiB
390 lines
9.3 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 <qcombobox.h>
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#include <qpushbutton.h>
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#include <qpixmap.h>
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#include <qimage.h>
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#include <qlabel.h>
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#include <qfiledialog.h>
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#include <qregexp.h>
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#include <qapplication.h>
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#include <qpainter.h>
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#include <qwmatrix.h>
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class MagWidget : public QWidget
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{
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Q_OBJECT
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public:
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MagWidget( QWidget *parent=0, const char *name=0 );
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public slots:
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void setZoom( int );
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void setRefresh( int );
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void save();
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void multiSave();
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protected:
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void paintEvent( QPaintEvent * );
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void mousePressEvent( QMouseEvent * );
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void mouseReleaseEvent( QMouseEvent * );
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void mouseMoveEvent( QMouseEvent * );
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void focusOutEvent( QFocusEvent * );
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void timerEvent( QTimerEvent * );
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void resizeEvent( QResizeEvent * );
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private:
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void grabAround(QPoint pos);
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void grab();
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QComboBox *zoom;
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QComboBox *refresh;
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QPushButton *saveButton;
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QPushButton *multiSaveButton;
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QPushButton *quitButton;
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QPixmap pm; // pixmap, magnified
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QPixmap p; // pixmap
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QImage image; // image of pixmap (for RGB)
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QLabel *rgb;
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int yoffset; // pixels in addition to the actual picture
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int z; // magnification factor
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int r; // autorefresh rate (index into refreshrates)
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bool grabbing; // TRUE if qmag is currently grabbing
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int grabx, graby;
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QString multifn; // filename for multisave
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};
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#ifdef COMPLEX_GUI
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static const char *zoomfactors[] = {
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"100%", "200%", "300%", "400%", "500%",
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"600%", "700%", "800%", "1600%", 0 };
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static const char *refreshrates[] = {
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"No autorefresh", "50 per second", "4 per second", "3 per second", "2 per second",
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"Every second", "Every two seconds", "Every three seconds",
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"Every five seconds", "Every ten seconds", 0 };
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#endif
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static const int timer[] = {
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0, 20, 250, 333, 500, 1000, 2000, 3000, 5000, 10000 };
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MagWidget::MagWidget( QWidget *parent, const char *name )
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: QWidget( parent, name)
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{
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z = 1; // default zoom (100%)
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r = 0; // default refresh (none)
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#ifdef COMPLEX_GUI
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int w=0, x=0, n;
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zoom = new QComboBox( FALSE, this );
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Q_CHECK_PTR(zoom);
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zoom->insertStrList( zoomfactors, 9 );
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connect( zoom, SIGNAL(activated(int)), SLOT(setZoom(int)) );
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refresh = new QComboBox( FALSE, this );
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Q_CHECK_PTR(refresh);
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refresh->insertStrList( refreshrates, 9 );
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connect( refresh, SIGNAL(activated(int)), SLOT(setRefresh(int)) );
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for( n=0; n<9; n++) {
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int w2 = zoom->fontMetrics().width( zoomfactors[n] );
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w = QMAX(w2, w);
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}
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zoom->setGeometry( 2, 2, w+30, 20 );
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x = w+34;
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w = 0;
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for( n=0; n<9; n++) {
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int w2 = refresh->fontMetrics().width( refreshrates[n] );
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w = QMAX(w2, w);
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}
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refresh->setGeometry( x, 2, w+30, 20 );
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saveButton = new QPushButton( this );
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Q_CHECK_PTR(saveButton);
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connect( saveButton, SIGNAL(clicked()), this, SLOT(save()) );
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saveButton->setText( "Save" );
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saveButton->setGeometry( x+w+30+2, 2,
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10+saveButton->fontMetrics().width("Save"), 20 );
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multiSaveButton = new QPushButton( this );
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multiSaveButton->setToggleButton(TRUE);
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Q_CHECK_PTR(multiSaveButton);
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connect( multiSaveButton, SIGNAL(clicked()), this, SLOT(multiSave()) );
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multiSaveButton->setText( "MultiSave" );
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multiSaveButton->setGeometry( saveButton->geometry().right() + 2, 2,
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10+multiSaveButton->fontMetrics().width("MultiSave"), 20 );
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quitButton = new QPushButton( this );
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Q_CHECK_PTR(quitButton);
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connect( quitButton, SIGNAL(clicked()), qApp, SLOT(quit()) );
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quitButton->setText( "Quit" );
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quitButton->setGeometry( multiSaveButton->geometry().right() + 2, 2,
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10+quitButton->fontMetrics().width("Quit"), 20 );
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#else
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zoom = 0;
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multiSaveButton = 0;
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#endif
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setRefresh(1);
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setZoom(5);
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rgb = new QLabel( this );
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Q_CHECK_PTR( rgb );
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rgb->setText( "" );
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rgb->setAlignment( AlignVCenter );
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rgb->resize( width(), rgb->fontMetrics().height() + 4 );
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#ifdef COMPLEX_GUI
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yoffset = zoom->height() // top buttons
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+ 4 // space around top buttons
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+ rgb->height(); // color-value text height
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setMinimumSize( quitButton->pos().x(), yoffset+20 );
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resize( quitButton->geometry().topRight().x() + 2, yoffset+60 );
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#else
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yoffset = 0;
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resize(350,350);
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#endif
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grabx = graby = -1;
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grabbing = FALSE;
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setMouseTracking( TRUE ); // and do let me know what pixel I'm at, eh?
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grabAround( QPoint(grabx=qApp->desktop()->width()/2, graby=qApp->desktop()->height()/2) );
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}
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void MagWidget::setZoom( int index )
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{
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if (index == 8)
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z = 16;
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else
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z = index+1;
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grab();
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}
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void MagWidget::setRefresh( int index )
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{
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r = index;
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killTimers();
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if (index && !grabbing)
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startTimer( timer[r] );
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}
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void MagWidget::save()
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{
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if ( !p.isNull() ) {
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killTimers();
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QString fn = QFileDialog::getSaveFileName();
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if ( !fn.isEmpty() )
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p.save( fn, "BMP" );
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if ( r )
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startTimer( timer[r] );
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}
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}
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void MagWidget::multiSave()
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{
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if ( !p.isNull() ) {
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multifn = ""; // stops saving
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multifn = QFileDialog::getSaveFileName();
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if ( multifn.isEmpty() )
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multiSaveButton->setOn(FALSE);
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if ( !r )
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p.save( multifn, "BMP" );
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} else {
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multiSaveButton->setOn(FALSE);
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}
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}
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void MagWidget::grab()
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{
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if ( !isVisible() )
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return; // don't eat resources when iconified
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if ( grabx < 0 || graby < 0 )
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return; // don't grab until the user has said to
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int x,y, w,h;
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w = (width()+z-1)/z;
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h = (height()+z-1-yoffset)/z;
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if ( w<1 || h<1 )
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return; // don't ask too much from the window system :)
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x = grabx-w/2; // find a suitable position to grab from
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y = graby-h/2;
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if ( x + w > QApplication::desktop()->width() )
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x = QApplication::desktop()->width()-w;
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else if ( x < 0 )
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x = 0;
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if ( y + h > QApplication::desktop()->height() )
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y = QApplication::desktop()->height()-h;
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else if ( y < 0 )
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y = 0;
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p = QPixmap::grabWindow( QApplication::desktop()->winId(), x, y, w, h );
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image = p.convertToImage();
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QWMatrix m; // after getting it, scale it
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m.scale( (double)z, (double)z );
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pm = p.xForm( m );
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if ( !multiSaveButton || !multiSaveButton->isOn() )
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repaint( FALSE ); // and finally repaint, flicker-free
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}
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void MagWidget::paintEvent( QPaintEvent * )
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{
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if ( !pm.isNull() ) {
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QPainter paint( this );
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paint.drawPixmap( 0, zoom ? zoom->height()+4 : 0, pm,
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0,0, width(), height()-yoffset );
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}
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}
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void MagWidget::mousePressEvent( QMouseEvent *e )
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{
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if ( !grabbing ) { // prepare to grab...
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grabbing = TRUE;
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killTimers();
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grabMouse( crossCursor );
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grabx = -1;
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graby = -1;
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} else { // REALLY prepare to grab
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grabx = mapToGlobal(e->pos()).x();
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graby = mapToGlobal(e->pos()).y();
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}
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}
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void MagWidget::mouseReleaseEvent( QMouseEvent * e )
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{
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if ( grabbing && grabx >= 0 && graby >= 0 ) {
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grabbing = FALSE;
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grabAround(e->pos());
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releaseMouse();
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}
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}
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void MagWidget::grabAround(QPoint pos)
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{
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int rx, ry;
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rx = mapToGlobal(pos).x();
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ry = mapToGlobal(pos).y();
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int w = QABS(rx-grabx);
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int h = QABS(ry-graby);
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if ( w > 10 && h > 10 ) {
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int pz;
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pz = 1;
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while ( w*pz*h*pz < width()*(height()-yoffset) &&
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w*pz < QApplication::desktop()->width() &&
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h*pz < QApplication::desktop()->height() )
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pz++;
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if ( (w*pz*h*pz - width()*(height()-yoffset)) >
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(width()*(height()-yoffset) - w*(pz-1)*h*(pz-1)) )
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pz--;
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if ( pz < 1 )
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pz = 1;
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if ( pz > 8 )
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pz = 8;
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if ( zoom )
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zoom->setCurrentItem( pz-1 );
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z = pz;
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grabx = QMIN(rx, grabx) + w/2;
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graby = QMIN(ry, graby) + h/2;
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resize( w*z, h*z+yoffset );
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}
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grab();
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if ( r )
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startTimer( timer[r] );
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}
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void MagWidget::mouseMoveEvent( QMouseEvent *e )
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{
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if ( grabbing || pm.isNull() ||
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e->pos().y() > height() - (zoom ? zoom->fontMetrics().height() - 4 : 0) ||
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e->pos().y() < (zoom ? zoom->height()+4 : 4) ) {
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rgb->setText( "" );
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} else {
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int x,y;
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x = e->pos().x() / z;
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y = (e->pos().y() - ( zoom ? zoom->height() : 0 ) - 4) / z;
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QString pixelinfo;
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if ( image.valid(x,y) )
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{
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QRgb px = image.pixel(x,y);
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pixelinfo.sprintf(" %3d,%3d,%3d #%02x%02x%02x",
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qRed(px), qGreen(px), qBlue(px),
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qRed(px), qGreen(px), qBlue(px));
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}
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QString label;
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label.sprintf( "x=%d, y=%d %s",
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x+grabx, y+graby, (const char*)pixelinfo );
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rgb->setText( label );
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}
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}
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void MagWidget::focusOutEvent( QFocusEvent * )
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{
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rgb->setText( "" );
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}
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void MagWidget::timerEvent( QTimerEvent * )
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{
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grab();
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/*
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if ( multiSaveButton->isOn() && !multifn.isEmpty() ) {
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QRegExp num("[0-9][0-9]*");
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int start;
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int len;
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if ((start=num.match(multifn,0,&len))>=0)
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multifn.replace(num,
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QString().setNum(multifn.mid(start,len).toInt()+1)
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);
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p.save( multifn, "BMP" );
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}
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*/
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}
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void MagWidget::resizeEvent( QResizeEvent * )
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{
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rgb->setGeometry( 0, height() - rgb->height(), width(), rgb->height() );
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grab();
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}
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#include "qmag.moc"
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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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MagWidget m;
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a.setMainWidget( &m );
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m.show();
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return a.exec();
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}
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