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#include <boost/multi_array.hpp> |
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#include <GL/gl.h> |
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#include <QtGui/QMouseEvent> |
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#include "selectRectWidget.hh" |
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using namespace boost; |
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using namespace mimas; |
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SelectRectWidget::SelectRectWidget( QWidget *parent, Qt::WFlags f ): |
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VideoWidget( parent, f ), dragging(false), haveRect(false) |
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{ |
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} |
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void SelectRectWidget::setImage( const image< rgba< unsigned char > > &_img ) |
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{ |
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dragging = false; |
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haveRect = false; |
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VideoWidget::setImage( _img ); |
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emit rectDefined( isRectDefined() ); |
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update(); |
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} |
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void SelectRectWidget::paintGL(void) |
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{ |
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VideoWidget::paintGL(); |
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if ( haveRect ) { |
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qglColor(Qt::red); |
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// glColor4f(1,0,0,0.5); |
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glPushMatrix(); |
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glScalef( zoom, zoom, 1.0 ); |
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glBegin(GL_LINE_LOOP); |
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glVertex2f( x0, y0 ); |
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glVertex2f( x1, y0 ); |
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glVertex2f( x1, y1 ); |
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glVertex2f( x0, y1 ); |
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glEnd(); |
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glPopMatrix(); |
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} |
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} |
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void SelectRectWidget::mousePressEvent( QMouseEvent *e ) |
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{ |
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// if left mouse-button was pressed: |
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if ( e->button() == Qt::LeftButton ) { |
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x0 = (int)floor( e->x() / zoom ); |
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y0 = (int)floor( e->y() / zoom ); |
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x1 = x0; |
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y1 = y0; |
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dragging = true; |
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haveRect = true; |
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update(); |
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emit rectDefined( isRectDefined() ); |
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}; |
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} |
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void SelectRectWidget::mouseReleaseEvent( QMouseEvent *e ) |
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{ |
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if ( e->button() == Qt::LeftButton ) { |
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x1 = (int)ceil( e->x() / zoom ); |
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y1 = (int)ceil( e->y() / zoom ); |
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if ( x0 > x1 ) { |
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x0 ^= x1; |
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x1 ^= x0; |
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x0 ^= x1; |
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}; |
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if ( y0 > y1 ) { |
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y0 ^= y1; |
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y1 ^= y0; |
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y0 ^= y1; |
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} |
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dragging = false; |
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update(); |
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emit rectDefined( isRectDefined() ); |
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} |
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} |
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void SelectRectWidget::mouseMoveEvent( QMouseEvent *e ) |
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{ |
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if ( dragging ) { |
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x1 = (int)ceil( e->x() / zoom ); |
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y1 = (int)ceil( e->y() / zoom ); |
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update(); |
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}; |
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} |
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void SelectRectWidget::clearSelection(void) |
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{ |
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haveRect = false; |
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emit rectDefined( isRectDefined() ); |
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} |
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multi_array< rgba< unsigned char >, 2 >::array_view< 2 >::type |
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view( multi_array_ref< rgba< unsigned char >, 2 > &in, |
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int x, int y, int w, int h ) |
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{ |
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typedef multi_array< rgba< unsigned char >, 2 >::index_range range; |
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typedef multi_array< rgba< unsigned char >, 2 >::array_view< 2 >::type |
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array_view; |
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multi_array< rgba< unsigned char >, 2 >::index_gen indices; |
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array_view out = |
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in[ indices[ range( y, y + h ) ][ range( x, x + w ) ] ]; |
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return out; |
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} |
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image< rgba< unsigned char > > SelectRectWidget::selectedImage() |
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{ |
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image< rgba< unsigned char > > retVal; |
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if ( isRectDefined() ) { |
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int |
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w = x1 + 1 - x0, |
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h = y1 + 1 - y0; |
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retVal.init( w, h ); |
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multi_array_ref< rgba< unsigned char >, 2 > imgData |
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( img.rawData(), extents[ img.getHeight() ][ img.getWidth() ] ); |
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multi_array_ref< rgba< unsigned char >, 2 > |
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( retVal.rawData(), |
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extents[ retVal.getHeight() ][ retVal.getWidth() ] ) = |
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view( imgData, x0, y0, w, h ); |
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}; |
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return retVal; |
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} |