plasma-framework/declarativeimports/graphicslayouts/gridlayout.cpp

190 lines
7.0 KiB
C++
Raw Normal View History

/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtDeclarative module 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,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
** $QT_END_LICENSE$
**
****************************************************************************/
#include "gridlayout.h"
#include <QGraphicsWidget>
#include <QDebug>
GridLayoutAttached::GridLayoutAttached(QObject *parent)
: QObject(parent), m_row(-1), m_column(-1), m_rowspan(1), m_colspan(1), m_alignment(-1), m_rowStretch(-1),
m_colStretch(-1), m_rowSpacing(-1), m_colSpacing(-1), m_rowPrefHeight(-1), m_rowMaxHeight(-1), m_rowMinHeight(-1),
m_rowFixHeight(-1), m_colPrefwidth(-1), m_colMaxwidth(-1), m_colMinwidth(-1), m_colFixwidth(-1)
{
}
void GridLayoutAttached::setAlignment(Qt::Alignment a)
{
if (m_alignment != a) {
m_alignment = a;
emit alignmentChanged(reinterpret_cast<QGraphicsLayoutItem*>(parent()), m_alignment);
}
}
QHash<QGraphicsLayoutItem*, GridLayoutAttached*> GraphicsGridLayoutObject::attachedProperties;
GraphicsGridLayoutObject::GraphicsGridLayoutObject(QObject *parent)
: QObject(parent)
{
}
GraphicsGridLayoutObject::~GraphicsGridLayoutObject()
{
}
void GraphicsGridLayoutObject::addWidget(QGraphicsWidget *widget)
{
//use attached properties
if (QObject *obj = attachedProperties.value(qobject_cast<QGraphicsLayoutItem*>(widget))) {
int row = static_cast<GridLayoutAttached *>(obj)->row();
int column = static_cast<GridLayoutAttached *>(obj)->column();
int rowSpan = static_cast<GridLayoutAttached *>(obj)->rowSpan();
int columnSpan = static_cast<GridLayoutAttached *>(obj)->columnSpan();
if (row == -1 || column == -1) {
qWarning() << "Must set row and column for an item in a grid layout";
return;
}
addItem(widget, row, column, rowSpan, columnSpan);
}
}
void GraphicsGridLayoutObject::addLayoutItem(QGraphicsLayoutItem *item)
{
//use attached properties
if (GridLayoutAttached *obj = attachedProperties.value(item)) {
int row = obj->row();
int column = obj->column();
int rowSpan = obj->rowSpan();
int columnSpan = obj->columnSpan();
Qt::Alignment alignment = obj->alignment();
if (row == -1 || column == -1) {
qWarning() << "Must set row and column for an item in a grid layout";
return;
}
if (obj->rowSpacing() != -1)
setRowSpacing(row, obj->rowSpacing());
if (obj->columnSpacing() != -1)
setColumnSpacing(column, obj->columnSpacing());
if (obj->rowStretchFactor() != -1)
setRowStretchFactor(row, obj->rowStretchFactor());
if (obj->columnStretchFactor() != -1)
setColumnStretchFactor(column, obj->columnStretchFactor());
if (obj->rowPreferredHeight() != -1)
setRowPreferredHeight(row, obj->rowPreferredHeight());
if (obj->rowMaximumHeight() != -1)
setRowMaximumHeight(row, obj->rowMaximumHeight());
if (obj->rowMinimumHeight() != -1)
setRowMinimumHeight(row, obj->rowMinimumHeight());
if (obj->rowFixedHeight() != -1)
setRowFixedHeight(row, obj->rowFixedHeight());
if (obj->columnPreferredWidth() != -1)
setColumnPreferredWidth(row, obj->columnPreferredWidth());
if (obj->columnMaximumWidth() != -1)
setColumnMaximumWidth(row, obj->columnMaximumWidth());
if (obj->columnMinimumWidth() != -1)
setColumnMinimumWidth(row, obj->columnMinimumWidth());
if (obj->columnFixedWidth() != -1)
setColumnFixedWidth(row, obj->columnFixedWidth());
addItem(item, row, column, rowSpan, columnSpan);
if (alignment != -1)
setAlignment(item, alignment);
QObject::connect(obj, SIGNAL(alignmentChanged(QGraphicsLayoutItem*, Qt::Alignment)),
this, SLOT(updateAlignment(QGraphicsLayoutItem*, Qt::Alignment)));
}
}
void GraphicsGridLayoutObject::removeAt(int index)
{
QGraphicsLayoutItem *item = itemAt(index);
if (item) {
GridLayoutAttached *obj = attachedProperties.value(item);
obj->disconnect(this);
attachedProperties.remove(item);
}
QGraphicsGridLayout::removeAt(index);
}
void GraphicsGridLayoutObject::clearChildren()
{
// do not delete the removed items; they will be deleted by the QML engine
while (count() > 0)
removeAt(count()-1);
}
qreal GraphicsGridLayoutObject::spacing() const
{
if (verticalSpacing() == horizontalSpacing())
return verticalSpacing();
return -1;
}
qreal GraphicsGridLayoutObject::contentsMargin() const
{
qreal a, b, c, d;
getContentsMargins(&a, &b, &c, &d);
if (a == b && a == c && a == d)
return a;
return -1;
}
void GraphicsGridLayoutObject::setContentsMargin(qreal m)
{
setContentsMargins(m, m, m, m);
}
void GraphicsGridLayoutObject::updateAlignment(QGraphicsLayoutItem *item, Qt::Alignment alignment)
{
QGraphicsGridLayout::setAlignment(item, alignment);
}
GridLayoutAttached *GraphicsGridLayoutObject::qmlAttachedProperties(QObject *obj)
{
GridLayoutAttached *rv = new GridLayoutAttached(obj);
if (qobject_cast<QGraphicsLayoutItem*>(obj))
attachedProperties.insert(qobject_cast<QGraphicsLayoutItem*>(obj), rv);
return rv;
}
#include "gridlayout.moc"