137 lines
4.0 KiB
C++
137 lines
4.0 KiB
C++
/* This file is a part of plaYUVer project
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* Copyright (C) 2014-2015 by Luis Lucas (luisfrlucas@gmail.com)
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* Joao Carreira (jfmcarreira@gmail.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/**
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* \file SubWindowHandle.cpp
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* \brief Sub windows handling
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*/
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#include "SubWindowHandle.h"
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namespace plaYUVer
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{
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SubWindowHandle::SubWindowHandle( QWidget * parent, UInt category ) :
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QScrollArea( parent )
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{
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setParent( parent );
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setAttribute( Qt::WA_DeleteOnClose );
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setBackgroundRole( QPalette::Light );
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// Create a new scroll area inside the sub-window
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connect( horizontalScrollBar(), SIGNAL( actionTriggered( int ) ), this, SLOT( updateLastScrollValue() ) );
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connect( verticalScrollBar(), SIGNAL( actionTriggered( int ) ), this, SLOT( updateLastScrollValue() ) );
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setHorizontalScrollBarPolicy( Qt::ScrollBarAlwaysOff );
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setVerticalScrollBarPolicy( Qt::ScrollBarAlwaysOff );
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setWidgetResizable( true );
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m_cLastScroll = QPoint();
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m_uiCategory = category;
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m_cWindowName = QString( " " );
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}
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SubWindowHandle::~SubWindowHandle()
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{
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}
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QSize SubWindowHandle::getScrollSize()
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{
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return QSize( viewport()->size().width() - 5, viewport()->size().height() - 5 );
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}
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Void SubWindowHandle::adjustScrollBarByOffset( QPoint Offset )
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{
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QScrollBar *scrollBar = horizontalScrollBar();
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scrollBar->setValue( int( scrollBar->value() + Offset.x() ) );
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m_cLastScroll.setX( scrollBar->value() );
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scrollBar = verticalScrollBar();
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scrollBar->setValue( int( scrollBar->value() + Offset.y() ) );
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m_cLastScroll.setY( scrollBar->value() );
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updateLastScrollValue();
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}
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// This function was developed with help of the schematics presented in
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// http://stackoverflow.com/questions/13155382/jscrollpane-zoom-relative-to-mouse-position
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Void SubWindowHandle::adjustScrollBarByScale( Double scale, QPoint center )
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{
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QScrollBar *scrollBar = horizontalScrollBar();
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if( center.isNull() )
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{
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scrollBar->setValue( int( scale * scrollBar->value() + ( ( scale - 1 ) * scrollBar->pageStep() / 2 ) ) );
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}
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else
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{
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Int x = center.x() - m_cLastScroll.x();
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Int value = int( scale * m_cLastScroll.x() + ( ( scale - 1 ) * x ) );
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if( value > scrollBar->maximum() )
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value = scrollBar->maximum();
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if( value < scrollBar->minimum() )
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value = scrollBar->minimum();
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scrollBar->setValue( value );
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}
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scrollBar = verticalScrollBar();
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if( center.isNull() )
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{
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scrollBar->setValue( int( scale * scrollBar->value() + ( ( scale - 1 ) * scrollBar->pageStep() / 2 ) ) );
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}
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else
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{
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Int y = center.y() - m_cLastScroll.y();
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Int value = int( scale * m_cLastScroll.y() + ( ( scale - 1 ) * y ) );
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if( value > scrollBar->maximum() )
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value = scrollBar->maximum();
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if( value < scrollBar->minimum() )
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value = scrollBar->minimum();
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scrollBar->setValue( value );
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}
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updateLastScrollValue();
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}
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Void SubWindowHandle::updateLastScrollValue()
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{
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QScrollBar *scrollBar = horizontalScrollBar();
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m_cLastScroll.setX( scrollBar->value() );
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scrollBar = verticalScrollBar();
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m_cLastScroll.setY( scrollBar->value() );
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}
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Void SubWindowHandle::setWindowName( QString name )
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{
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m_cWindowName = name;
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setWindowTitle( m_cWindowName );
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}
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QString SubWindowHandle::getWindowName()
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{
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return m_cWindowName;
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}
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Bool SubWindowHandle::mayClose()
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{
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return true;
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}
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} // NAMESPACE
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