--- /dev/null
+/*
+ * Copyright (C) 2007 Luca Gugelmann <lucag@student.ethz.ch>
+ * Adapted for Kdenlive by Jean-Baptiste Mardelle (2008) jb@kdenlive.org
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Library General Public License version 2 as
+ * published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include "regiongrabber.h"
+
+#include <QPainter>
+#include <QMouseEvent>
+#include <QApplication>
+#include <QDesktopWidget>
+#include <QToolTip>
+
+#include <klocale.h>
+#include <KWindowSystem>
+
+RegionGrabber::RegionGrabber( ) :
+ QWidget( 0 ), selection(), mouseDown( false ), newSelection( false ),
+ handleSize( 10 ), mouseOverHandle( 0 ), idleTimer(),
+ showHelp( true ), grabbing( false ),
+ TLHandle(0,0,handleSize,handleSize), TRHandle(0,0,handleSize,handleSize),
+ BLHandle(0,0,handleSize,handleSize), BRHandle(0,0,handleSize,handleSize),
+ LHandle(0,0,handleSize,handleSize), THandle(0,0,handleSize,handleSize),
+ RHandle(0,0,handleSize,handleSize), BHandle(0,0,handleSize,handleSize)
+{
+ handles << &TLHandle << &TRHandle << &BLHandle << &BRHandle
+ << &LHandle << &THandle << &RHandle << &BHandle;
+ setMouseTracking( true );
+ setWindowFlags( Qt::WindowStaysOnTopHint | Qt::FramelessWindowHint | Qt::X11BypassWindowManagerHint);
+ int timeout = KWindowSystem::compositingActive() ? 200 : 50;
+ QTimer::singleShot( timeout, this, SLOT(init()) );
+ connect( &idleTimer, SIGNAL( timeout() ), this, SLOT( displayHelp() ) );
+ idleTimer.start( 3000 );
+}
+
+RegionGrabber::~RegionGrabber()
+{
+}
+
+void RegionGrabber::init()
+{
+ pixmap = QPixmap::grabWindow( QApplication::desktop()->winId() );
+ showFullScreen();
+ resize( pixmap.size() );
+ move(0, 0);
+ setCursor( Qt::CrossCursor );
+}
+
+void RegionGrabber::displayHelp()
+{
+ showHelp = true;
+ update();
+}
+
+void RegionGrabber::paintEvent( QPaintEvent* e )
+{
+ Q_UNUSED( e );
+ if ( grabbing ) // grabWindow() should just get the background
+ return;
+
+ QPainter painter( this );
+
+ QPalette pal(QToolTip::palette());
+ QFont font = QToolTip::font();
+
+ QColor handleColor = pal.color( QPalette::Active, QPalette::Highlight );
+ handleColor.setAlpha( 160 );
+ QColor overlayColor( 0, 0, 0, 160 );
+ QColor textColor = pal.color( QPalette::Active, QPalette::Text );
+ QColor textBackgroundColor = pal.color( QPalette::Active, QPalette::Base );
+ painter.drawPixmap(0, 0, pixmap);
+ painter.setFont(font);
+
+ QRect r = selection.normalized().adjusted( 0, 0, -1, -1 );
+ if ( !selection.isNull() )
+ {
+ QRegion grey( rect() );
+ grey = grey.subtracted( r );
+ painter.setPen( handleColor );
+ painter.setBrush( overlayColor );
+ painter.setClipRegion( grey );
+ painter.drawRect( -1, -1, rect().width() + 1, rect().height() + 1 );
+ painter.setClipRect( rect() );
+ painter.setBrush( Qt::NoBrush );
+ painter.drawRect( r );
+ }
+
+ if ( showHelp )
+ {
+ painter.setPen( textColor );
+ painter.setBrush( textBackgroundColor );
+ QString helpText = i18n( "Select a region using the mouse. To take the snapshot, press the Enter key. Press Esc to quit." );
+ QRect textRect = painter.boundingRect( rect().adjusted( 2, 2, -2, -2 ), Qt::TextWordWrap, helpText );
+ textRect.adjust( -2, -2, 4, 2 );
+ painter.drawRect( textRect );
+ textRect.moveTopLeft( QPoint( 3, 3 ) );
+ painter.drawText( textRect, helpText );
+ }
+
+ if ( selection.isNull() )
+ {
+ return;
+ }
+
+ // The grabbed region is everything which is covered by the drawn
+ // rectangles (border included). This means that there is no 0px
+ // selection, since a 0px wide rectangle will always be drawn as a line.
+ QString txt = QString( "%1x%2" ).arg( selection.width() == 0 ? 2 : selection.width() )
+ .arg( selection.height() == 0 ? 2 : selection.height() );
+ QRect textRect = painter.boundingRect( rect(), Qt::AlignLeft, txt );
+ QRect boundingRect = textRect.adjusted( -4, 0, 0, 0);
+
+ if ( textRect.width() < r.width() - 2*handleSize &&
+ textRect.height() < r.height() - 2*handleSize &&
+ ( r.width() > 100 && r.height() > 100 ) ) // center, unsuitable for small selections
+ {
+ boundingRect.moveCenter( r.center() );
+ textRect.moveCenter( r.center() );
+ }
+ else if ( r.y() - 3 > textRect.height() &&
+ r.x() + textRect.width() < rect().right() ) // on top, left aligned
+ {
+ boundingRect.moveBottomLeft( QPoint( r.x(), r.y() - 3 ) );
+ textRect.moveBottomLeft( QPoint( r.x() + 2, r.y() - 3 ) );
+ }
+ else if ( r.x() - 3 > textRect.width() ) // left, top aligned
+ {
+ boundingRect.moveTopRight( QPoint( r.x() - 3, r.y() ) );
+ textRect.moveTopRight( QPoint( r.x() - 5, r.y() ) );
+ }
+ else if ( r.bottom() + 3 + textRect.height() < rect().bottom() &&
+ r.right() > textRect.width() ) // at bottom, right aligned
+ {
+ boundingRect.moveTopRight( QPoint( r.right(), r.bottom() + 3 ) );
+ textRect.moveTopRight( QPoint( r.right() - 2, r.bottom() + 3 ) );
+ }
+ else if ( r.right() + textRect.width() + 3 < rect().width() ) // right, bottom aligned
+ {
+ boundingRect.moveBottomLeft( QPoint( r.right() + 3, r.bottom() ) );
+ textRect.moveBottomLeft( QPoint( r.right() + 5, r.bottom() ) );
+ }
+ // if the above didn't catch it, you are running on a very tiny screen...
+ painter.setPen( textColor );
+ painter.setBrush( textBackgroundColor );
+ painter.drawRect( boundingRect );
+ painter.drawText( textRect, txt );
+
+ if ( ( r.height() > handleSize*2 && r.width() > handleSize*2 )
+ || !mouseDown )
+ {
+ updateHandles();
+ painter.setPen( handleColor );
+ handleColor.setAlpha( 60 );
+ painter.setBrush( handleColor );
+ painter.drawRects( handleMask().rects() );
+ }
+}
+
+void RegionGrabber::resizeEvent( QResizeEvent* e )
+{
+ Q_UNUSED( e );
+ if ( selection.isNull() )
+ return;
+ QRect r = selection;
+ r.setTopLeft( limitPointToRect( r.topLeft(), rect() ) );
+ r.setBottomRight( limitPointToRect( r.bottomRight(), rect() ) );
+ if ( r.width() <= 1 || r.height() <= 1 ) //this just results in ugly drawing...
+ r = QRect();
+ selection = r;
+}
+
+void RegionGrabber::mousePressEvent( QMouseEvent* e )
+{
+ showHelp = false;
+ idleTimer.stop();
+ if ( e->button() == Qt::LeftButton )
+ {
+ mouseDown = true;
+ dragStartPoint = e->pos();
+ selectionBeforeDrag = selection;
+ if ( !selection.contains( e->pos() ) )
+ {
+ newSelection = true;
+ selection = QRect();
+ showHelp = true;
+ }
+ else
+ {
+ setCursor( Qt::ClosedHandCursor );
+ }
+ }
+ else if ( e->button() == Qt::RightButton )
+ {
+ newSelection = false;
+ selection = QRect();
+ setCursor( Qt::CrossCursor );
+ }
+ update();
+}
+
+void RegionGrabber::mouseMoveEvent( QMouseEvent* e )
+{
+ if ( mouseDown )
+ {
+ if ( newSelection )
+ {
+ QPoint p = e->pos();
+ QRect r = rect();
+ selection = QRect( dragStartPoint, limitPointToRect( p, r ) ).normalized();
+ }
+ else if ( mouseOverHandle == 0 ) // moving the whole selection
+ {
+ QRect r = rect().normalized(), s = selectionBeforeDrag.normalized();
+ QPoint p = s.topLeft() + e->pos() - dragStartPoint;
+ r.setBottomRight( r.bottomRight() - QPoint( s.width(), s.height() ) );
+ if ( !r.isNull() && r.isValid() )
+ selection.moveTo( limitPointToRect( p, r ) );
+ }
+ else // dragging a handle
+ {
+ QRect r = selectionBeforeDrag;
+ QPoint offset = e->pos() - dragStartPoint;
+
+ if ( mouseOverHandle == &TLHandle || mouseOverHandle == &THandle
+ || mouseOverHandle == &TRHandle ) // dragging one of the top handles
+ {
+ r.setTop( r.top() + offset.y() );
+ }
+
+ if ( mouseOverHandle == &TLHandle || mouseOverHandle == &LHandle
+ || mouseOverHandle == &BLHandle ) // dragging one of the left handles
+ {
+ r.setLeft( r.left() + offset.x() );
+ }
+
+ if ( mouseOverHandle == &BLHandle || mouseOverHandle == &BHandle
+ || mouseOverHandle == &BRHandle ) // dragging one of the bottom handles
+ {
+ r.setBottom( r.bottom() + offset.y() );
+ }
+
+ if ( mouseOverHandle == &TRHandle || mouseOverHandle == &RHandle
+ || mouseOverHandle == &BRHandle ) // dragging one of the right handles
+ {
+ r.setRight( r.right() + offset.x() );
+ }
+ r = r.normalized();
+ r.setTopLeft( limitPointToRect( r.topLeft(), rect() ) );
+ r.setBottomRight( limitPointToRect( r.bottomRight(), rect() ) );
+ selection = r;
+ }
+ update();
+ }
+ else
+ {
+ if ( selection.isNull() )
+ return;
+ bool found = false;
+ foreach( QRect* r, handles )
+ {
+ if ( r->contains( e->pos() ) )
+ {
+ mouseOverHandle = r;
+ found = true;
+ break;
+ }
+ }
+ if ( !found )
+ {
+ mouseOverHandle = 0;
+ if ( selection.contains( e->pos() ) )
+ setCursor( Qt::OpenHandCursor );
+ else
+ setCursor( Qt::CrossCursor );
+ }
+ else
+ {
+ if ( mouseOverHandle == &TLHandle || mouseOverHandle == &BRHandle )
+ setCursor( Qt::SizeFDiagCursor );
+ if ( mouseOverHandle == &TRHandle || mouseOverHandle == &BLHandle )
+ setCursor( Qt::SizeBDiagCursor );
+ if ( mouseOverHandle == &LHandle || mouseOverHandle == &RHandle )
+ setCursor( Qt::SizeHorCursor );
+ if ( mouseOverHandle == &THandle || mouseOverHandle == &BHandle )
+ setCursor( Qt::SizeVerCursor );
+ }
+ }
+}
+
+void RegionGrabber::mouseReleaseEvent( QMouseEvent* e )
+{
+ mouseDown = false;
+ newSelection = false;
+ idleTimer.start();
+ if ( mouseOverHandle == 0 && selection.contains( e->pos() ) )
+ setCursor( Qt::OpenHandCursor );
+ update();
+}
+
+void RegionGrabber::mouseDoubleClickEvent( QMouseEvent* )
+{
+ grabRect();
+}
+
+void RegionGrabber::keyPressEvent( QKeyEvent* e )
+{
+ if ( e->key() == Qt::Key_Escape )
+ {
+ emit regionGrabbed( QRect() );
+ close();
+ }
+ else if ( e->key() == Qt::Key_Enter || e->key() == Qt::Key_Return )
+ {
+ grabRect();
+ }
+ else
+ {
+ e->ignore();
+ }
+}
+
+void RegionGrabber::grabRect()
+{
+ QRect r = selection.normalized();
+ if ( !r.isNull() && r.isValid() )
+ {
+ grabbing = true;
+ emit regionGrabbed( r );
+ }
+ close();
+}
+
+void RegionGrabber::updateHandles()
+{
+ QRect r = selection.normalized().adjusted( 0, 0, -1, -1 );
+ int s2 = handleSize / 2;
+
+ TLHandle.moveTopLeft( r.topLeft() );
+ TRHandle.moveTopRight( r.topRight() );
+ BLHandle.moveBottomLeft( r.bottomLeft() );
+ BRHandle.moveBottomRight( r.bottomRight() );
+
+ LHandle.moveTopLeft( QPoint( r.x(), r.y() + r.height() / 2 - s2) );
+ THandle.moveTopLeft( QPoint( r.x() + r.width() / 2 - s2, r.y() ) );
+ RHandle.moveTopRight( QPoint( r.right(), r.y() + r.height() / 2 - s2 ) );
+ BHandle.moveBottomLeft( QPoint( r.x() + r.width() / 2 - s2, r.bottom() ) );
+}
+
+QRegion RegionGrabber::handleMask() const
+{
+ // note: not normalized QRects are bad here, since they will not be drawn
+ QRegion mask;
+ foreach( QRect* rect, handles ) mask += QRegion( *rect );
+ return mask;
+}
+
+QPoint RegionGrabber::limitPointToRect( const QPoint &p, const QRect &r ) const
+{
+ QPoint q;
+ q.setX( p.x() < r.x() ? r.x() : p.x() < r.right() ? p.x() : r.right() );
+ q.setY( p.y() < r.y() ? r.y() : p.y() < r.bottom() ? p.y() : r.bottom() );
+ return q;
+}
+
+#include "regiongrabber.moc"
projects / kdenlive / blobdiff