qt5base-lts/examples/sql/drilldown/view.cpp
Jani Heikkinen 2b75c156b6 Updated BSD licensed file headers
Change-Id: I6441ff931dbd33b698d762e6f6784898f3f60fe7
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
2015-02-15 07:41:17 +00:00

181 lines
5.5 KiB
C++

/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** 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:
**
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** 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 The Qt Company Ltd nor the names of its
** contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
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**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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****************************************************************************/
#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]
//! [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);
}
}
//! [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]