qt5base-lts/examples/itemviews/frozencolumn/freezetablewidget.cpp

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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
** the names of its contributors may be used to endorse or promote
** products derived from this software without specific prior written
** permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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** $QT_END_LICENSE$
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****************************************************************************/
#include <QtWidgets>
#include "freezetablewidget.h"
//! [constructor]
FreezeTableWidget::FreezeTableWidget(QAbstractItemModel * model)
{
setModel(model);
frozenTableView = new QTableView(this);
init();
//connect the headers and scrollbars of both tableviews together
connect(horizontalHeader(),SIGNAL(sectionResized(int,int,int)), this,
SLOT(updateSectionWidth(int,int,int)));
connect(verticalHeader(),SIGNAL(sectionResized(int,int,int)), this,
SLOT(updateSectionHeight(int,int,int)));
connect(frozenTableView->verticalScrollBar(), SIGNAL(valueChanged(int)),
verticalScrollBar(), SLOT(setValue(int)));
connect(verticalScrollBar(), SIGNAL(valueChanged(int)),
frozenTableView->verticalScrollBar(), SLOT(setValue(int)));
}
//! [constructor]
FreezeTableWidget::~FreezeTableWidget()
{
delete frozenTableView;
}
//! [init part1]
void FreezeTableWidget::init()
{
frozenTableView->setModel(model());
frozenTableView->setFocusPolicy(Qt::NoFocus);
frozenTableView->verticalHeader()->hide();
frozenTableView->horizontalHeader()->setResizeMode(QHeaderView::Fixed);
viewport()->stackUnder(frozenTableView);
//! [init part1]
//! [init part2]
frozenTableView->setStyleSheet("QTableView { border: none;"
"background-color: #8EDE21;"
"selection-background-color: #999}"); //for demo purposes
frozenTableView->setSelectionModel(selectionModel());
for(int col=1; col<model()->columnCount(); col++)
frozenTableView->setColumnHidden(col, true);
frozenTableView->setColumnWidth(0, columnWidth(0) );
frozenTableView->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
frozenTableView->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
frozenTableView->show();
updateFrozenTableGeometry();
setHorizontalScrollMode(ScrollPerPixel);
setVerticalScrollMode(ScrollPerPixel);
frozenTableView->setVerticalScrollMode(ScrollPerPixel);
}
//! [init part2]
//! [sections]
void FreezeTableWidget::updateSectionWidth(int logicalIndex, int, int newSize)
{
if(logicalIndex==0){
frozenTableView->setColumnWidth(0,newSize);
updateFrozenTableGeometry();
}
}
void FreezeTableWidget::updateSectionHeight(int logicalIndex, int, int newSize)
{
frozenTableView->setRowHeight(logicalIndex, newSize);
}
//! [sections]
//! [resize]
void FreezeTableWidget::resizeEvent(QResizeEvent * event)
{
QTableView::resizeEvent(event);
updateFrozenTableGeometry();
}
//! [resize]
//! [navigate]
QModelIndex FreezeTableWidget::moveCursor(CursorAction cursorAction,
Qt::KeyboardModifiers modifiers)
{
QModelIndex current = QTableView::moveCursor(cursorAction, modifiers);
if(cursorAction == MoveLeft && current.column()>0
&& visualRect(current).topLeft().x() < frozenTableView->columnWidth(0) ){
const int newValue = horizontalScrollBar()->value() + visualRect(current).topLeft().x()
- frozenTableView->columnWidth(0);
horizontalScrollBar()->setValue(newValue);
}
return current;
}
//! [navigate]
void FreezeTableWidget::scrollTo (const QModelIndex & index, ScrollHint hint){
if(index.column()>0)
QTableView::scrollTo(index, hint);
}
//! [geometry]
void FreezeTableWidget::updateFrozenTableGeometry()
{
frozenTableView->setGeometry( verticalHeader()->width()+frameWidth(),
frameWidth(), columnWidth(0),
viewport()->height()+horizontalHeader()->height());
}
//! [geometry]