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Diffstat (limited to 'src/part/radialMap/segmentTip.cpp')
| -rw-r--r-- | src/part/radialMap/segmentTip.cpp | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/src/part/radialMap/segmentTip.cpp b/src/part/radialMap/segmentTip.cpp new file mode 100644 index 0000000..f73e845 --- /dev/null +++ b/src/part/radialMap/segmentTip.cpp @@ -0,0 +1,186 @@ +//Author: Max Howell <max.howell@methylblue.com>, (C) 2003-4 +//Copyright: See COPYING file that comes with this distribution + +#include "fileTree.h" +#include "segmentTip.h" + +#include <cstdlib> +#include <kapplication.h> //installing eventFilters +#include <kglobal.h> +#include <kglobalsettings.h> +#include <klocale.h> +#include <kpixmapeffect.h> +#include <qpainter.h> +#include <qtooltip.h> //for its palette + + + +namespace RadialMap { + + +bool isBackingStoreActive() +{ + // # xdpyinfo | grep backing + // options: backing-store YES, save-unders YES + + char buffer[4096]; + FILE *xdpyinfo = popen( "xdpyinfo", "r" ); + int const N = fread( (void*)buffer, sizeof(char), 4096, xdpyinfo ); + buffer[ N ] = '\0'; + pclose( xdpyinfo ); + + return QString::fromLocal8Bit( buffer ).contains( "backing-store YES" ); +} + + +SegmentTip::SegmentTip( uint h ) + : QWidget( 0, 0, WNoAutoErase | WStyle_Customize | WStyle_NoBorder | WStyle_Tool | WStyle_StaysOnTop | WX11BypassWM ) + , m_cursorHeight( -h ) + , m_backing_store( isBackingStoreActive() ) +{ + setBackgroundMode( Qt::NoBackground ); +} + +void +SegmentTip::moveTo( QPoint p, const QWidget &canvas, bool placeAbove ) +{ + //**** this function is very slow and seems to be visibly influenced by operations like mapFromGlobal() (who knows why!) + // ** so any improvements are much desired + + //TODO uints could improve the class + p.rx() -= rect().center().x(); + p.ry() -= (placeAbove ? 8 + height() : m_cursorHeight - 8); + + const QRect screen = KGlobalSettings::desktopGeometry( parentWidget() ); + + const int x = p.x(); + const int y = p.y(); + const int x2 = x + width(); + const int y2 = y + height(); //how's it ever gunna get below screen height?! (well you never know I spose) + const int sw = screen.width(); + const int sh = screen.height(); + + if( x < 0 ) p.setX( 0 ); + if( y < 0 ) p.setY( 0 ); + if( x2 > sw ) p.rx() -= x2 - sw; + if( y2 > sh ) p.ry() -= y2 - sh; + + + //I'm using this QPoint to determine where to offset the bitBlt in m_pixmap + QPoint offset = canvas.mapToGlobal( QPoint() ) - p; + if( offset.x() < 0 ) offset.setX( 0 ); + if( offset.y() < 0 ) offset.setY( 0 ); + + + const QRect alphaMaskRect( canvas.mapFromGlobal( p ), size() ); + const QRect intersection( alphaMaskRect.intersect( canvas.rect() ) ); + + m_pixmap.resize( size() ); //move to updateTip once you are sure it can never be null + bitBlt( &m_pixmap, offset, &canvas, intersection, Qt::CopyROP ); + + QColor const c = QToolTip::palette().color( QPalette::Active, QColorGroup::Background ); + if (!m_backing_store) + m_pixmap.fill( c ); + + QPainter paint( &m_pixmap ); + paint.setPen( Qt::black ); + paint.setBrush( Qt::NoBrush ); + paint.drawRect( rect() ); + paint.end(); + + if (m_backing_store) + m_pixmap = KPixmapEffect::fade( m_pixmap, 0.6, c ); + + paint.begin( &m_pixmap ); + paint.drawText( rect(), AlignCenter, m_text ); + paint.end(); + + p += screen.topLeft(); //for Xinerama users + + move( x, y ); + show(); + update(); +} + +void +SegmentTip::updateTip( const File* const file, const Directory* const root ) +{ + const QString s1 = file->fullPath( root ); + QString s2 = file->humanReadableSize(); + KLocale *loc = KGlobal::locale(); + const uint MARGIN = 3; + const uint pc = 100 * file->size() / root->size(); + uint maxw = 0; + uint h = fontMetrics().height()*2 + 2*MARGIN; + + if( pc > 0 ) s2 += QString( " (%1%)" ).arg( loc->formatNumber( pc, 0 ) ); + + m_text = s1; + m_text += '\n'; + m_text += s2; + + if( file->isDirectory() ) + { + double files = static_cast<const Directory*>(file)->children(); + const uint pc = uint((100 * files) / (double)root->children()); + QString s3 = i18n( "Files: %1" ).arg( loc->formatNumber( files, 0 ) ); + + if( pc > 0 ) s3 += QString( " (%1%)" ).arg( loc->formatNumber( pc, 0 ) ); + + maxw = fontMetrics().width( s3 ); + h += fontMetrics().height(); + m_text += '\n'; + m_text += s3; + } + + uint + w = fontMetrics().width( s1 ); if( w > maxw ) maxw = w; + w = fontMetrics().width( s2 ); if( w > maxw ) maxw = w; + + resize( maxw + 2 * MARGIN, h ); +} + +bool +SegmentTip::event( QEvent *e ) +{ + switch( e->type() ) + { + case QEvent::Show: + kapp->installEventFilter( this ); + break; + case QEvent::Hide: + kapp->removeEventFilter( this ); + break; + case QEvent::Paint: + { + //QPainter( this ).drawPixmap( 0, 0, m_pixmap ); + bitBlt( this, 0, 0, &m_pixmap ); + return true; + } + default: + ; + } + + return false/*QWidget::event( e )*/; +} + +bool +SegmentTip::eventFilter( QObject*, QEvent *e ) +{ + switch ( e->type() ) + { + case QEvent::Leave: +// case QEvent::MouseButtonPress: +// case QEvent::MouseButtonRelease: + case QEvent::KeyPress: + case QEvent::KeyRelease: + case QEvent::FocusIn: + case QEvent::FocusOut: + case QEvent::Wheel: + hide(); //FALL THROUGH + default: + return false; //allow this event to passed to target + } +} + +} //namespace RadialMap |