-
Topi Reinio authored
QtWidgets/Drill Down example uses images and information about Nokia's old office locations as content. This change updates the example to use concepts related to Qt instead. In addition, - Documentation, screenshot updated accordingly - Corrected aspect ratio when scaling image items in the scene - Added a gray background with a slight gradient - Removed Symbian-specific code remnant Task-number: QTBUG-31075 Change-Id: Id8abfbf7f4033f74172477570f8f28390854101c Reviewed-by:Friedemann Kleint <Friedemann.Kleint@digia.com> Reviewed-by:
Jerome Pasion <jerome.pasion@digia.com>
e724fd47
/******************************************************************************** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).** Contact: http://www.qt-project.org/legal**** 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 Digia Plc 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 "informationwindow.h"#include "imageitem.h"#include "view.h"//! [0]View::View(const QString &items, const QString &images, QWidget *parent) : QGraphicsView(parent){ itemTable = new QSqlRelationalTableModel(this); itemTable->setTable(items); itemTable->setRelation(1, QSqlRelation(images, "itemid", "file")); itemTable->select();//! [0]//! [1] scene = new QGraphicsScene(this); scene->setSceneRect(0, 0, 465, 365); setScene(scene); addItems(); setMinimumSize(470, 370); setMaximumSize(470, 370); QLinearGradient gradient(QPointF(0, 0), QPointF(0, 370)); gradient.setColorAt(0, QColor("#868482")); gradient.setColorAt(1, QColor("#5d5b59")); setBackgroundBrush(gradient);}//! [1]7172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140
//! [3]
void View::addItems()
{
int itemCount = itemTable->rowCount();
int imageOffset = 150;
int leftMargin = 70;
int topMargin = 40;
for (int i = 0; i < itemCount; i++) {
ImageItem *image;
QGraphicsTextItem *label;
QSqlRecord record = itemTable->record(i);
int id = record.value("id").toInt();
QString file = record.value("file").toString();
QString item = record.value("itemtype").toString();
int columnOffset = ((i % 2) * 37);
int x = ((i % 2) * imageOffset) + leftMargin + columnOffset;
int y = ((i / 2) * imageOffset) + topMargin;
image = new ImageItem(id, QPixmap(":/" + file));
image->setData(0, i);
image->setPos(x, y);
scene->addItem(image);
label = scene->addText(item);
label->setDefaultTextColor(QColor("#d7d6d5"));
QPointF labelOffset((120 - label->boundingRect().width()) / 2, 120.0);
label->setPos(QPointF(x, y) + labelOffset);
}
}
//! [3]
//! [5]
void View::mouseReleaseEvent(QMouseEvent *event)
{
if (QGraphicsItem *item = itemAt(event->pos())) {
if (ImageItem *image = qgraphicsitem_cast<ImageItem *>(item))
showInformation(image);
}
QGraphicsView::mouseReleaseEvent(event);
}
//! [5]
//! [6]
void View::showInformation(ImageItem *image)
{
int id = image->id();
if (id < 0 || id >= itemTable->rowCount())
return;
InformationWindow *window = findWindow(id);
if (window && window->isVisible()) {
window->raise();
window->activateWindow();
} else if (window && !window->isVisible()) {
window->show();
} else {
InformationWindow *window;
window = new InformationWindow(id, itemTable, this);
connect(window, SIGNAL(imageChanged(int,QString)),
this, SLOT(updateImage(int,QString)));
window->move(pos() + QPoint(20, 40));
window->show();
informationWindows.append(window);
141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181
}
}
//! [6]
//! [7]
void View::updateImage(int id, const QString &fileName)
{
QList<QGraphicsItem *> items = scene->items();
while(!items.empty()) {
QGraphicsItem *item = items.takeFirst();
if (ImageItem *image = qgraphicsitem_cast<ImageItem *>(item)) {
if (image->id() == id){
image->setPixmap(QPixmap(":/" +fileName));
image->adjust();
break;
}
}
}
}
//! [7]
//! [8]
InformationWindow* View::findWindow(int id)
{
QList<InformationWindow*>::iterator i, beginning, end;
beginning = informationWindows.begin();
end = informationWindows.end();
for (i = beginning; i != end; ++i) {
InformationWindow *window = (*i);
if (window && (window->id() == id))
return window;
}
return 0;
}
//! [8]