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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qcolumnviewgrip_p.h"
#include <qstyleoption.h>
#include <qpainter.h>
#include <qbrush.h>
#include <qevent.h>
#include <qdebug.h>
QT_BEGIN_NAMESPACE
/*
\internal
class QColumnViewGrip
QColumnViewGrip is created to go inside QAbstractScrollArea's corner.
When the mouse it moved it will resize the scroll area and emit's a signal.
*/
/*
\internal
\fn void QColumnViewGrip::gripMoved()
Signal that is emitted when the grip moves the parent widget.
*/
/*!
Creates a new QColumnViewGrip with the given \a parent to view a model.
Use setModel() to set the model.
*/
QColumnViewGrip::QColumnViewGrip(QWidget *parent)
: QWidget(*new QColumnViewGripPrivate, parent, { })
{
#ifndef QT_NO_CURSOR
setCursor(Qt::SplitHCursor);
#endif
}
/*!
\internal
*/
QColumnViewGrip::QColumnViewGrip(QColumnViewGripPrivate & dd, QWidget *parent, Qt::WindowFlags f)
: QWidget(dd, parent, f)
{
}
/*!
Destroys the view.
*/
QColumnViewGrip::~QColumnViewGrip()
{
}
/*!
Attempt to resize the parent object by \a offset
returns the amount of offset that it was actually able to resized
*/
int QColumnViewGrip::moveGrip(int offset)
{
QWidget *parentWidget = (QWidget*)parent();
// first resize the parent
int oldWidth = parentWidget->width();
int newWidth = oldWidth;
if (isRightToLeft())
newWidth -= offset;
else
newWidth += offset;
newWidth = qMax(parentWidget->minimumWidth(), newWidth);
parentWidget->resize(newWidth, parentWidget->height());
// Then have the view move the widget
int realOffset = parentWidget->width() - oldWidth;
int oldX = parentWidget->x();
if (realOffset != 0)
emit gripMoved(realOffset);
if (isRightToLeft())
realOffset = -1 * (oldX - parentWidget->x());
return realOffset;
}
/*!
\reimp
*/
void QColumnViewGrip::paintEvent(QPaintEvent *event)
{
QPainter painter(this);
QStyleOption opt;
opt.initFrom(this);
style()->drawControl(QStyle::CE_ColumnViewGrip, &opt, &painter, this);
event->accept();
}
/*!
\reimp
Resize the parent window to the sizeHint
*/
void QColumnViewGrip::mouseDoubleClickEvent(QMouseEvent *event)
{
Q_UNUSED(event);
QWidget *parentWidget = (QWidget*)parent();
int offset = parentWidget->sizeHint().width() - parentWidget->width();
if (isRightToLeft())
offset *= -1;
moveGrip(offset);
event->accept();
}
/*!
\reimp
Begin watching for mouse movements
*/
void QColumnViewGrip::mousePressEvent(QMouseEvent *event)
{
Q_D(QColumnViewGrip);
d->originalXLocation = event->globalPosition().toPoint().x();
event->accept();
}
/*!
\reimp
Calculate the movement of the grip and moveGrip() and emit gripMoved
*/
void QColumnViewGrip::mouseMoveEvent(QMouseEvent *event)
{
Q_D(QColumnViewGrip);
int offset = event->globalPosition().toPoint().x() - d->originalXLocation;
d->originalXLocation = moveGrip(offset) + d->originalXLocation;
event->accept();
}
/*!
\reimp
Stop watching for mouse movements
*/
void QColumnViewGrip::mouseReleaseEvent(QMouseEvent *event)
{
Q_D(QColumnViewGrip);
d->originalXLocation = -1;
event->accept();
}
/*
* private object implementation
*/
QColumnViewGripPrivate::QColumnViewGripPrivate()
: QWidgetPrivate(),
originalXLocation(-1)
{
}
QT_END_NAMESPACE
#include "moc_qcolumnviewgrip_p.cpp"
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