2b75c156b6
Change-Id: I6441ff931dbd33b698d762e6f6784898f3f60fe7 Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
181 lines
5.5 KiB
C++
181 lines
5.5 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "informationwindow.h"
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#include "imageitem.h"
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#include "view.h"
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//! [0]
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View::View(const QString &items, const QString &images, QWidget *parent)
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: QGraphicsView(parent)
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{
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itemTable = new QSqlRelationalTableModel(this);
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itemTable->setTable(items);
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itemTable->setRelation(1, QSqlRelation(images, "itemid", "file"));
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itemTable->select();
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//! [0]
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//! [1]
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scene = new QGraphicsScene(this);
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scene->setSceneRect(0, 0, 465, 365);
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setScene(scene);
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addItems();
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setMinimumSize(470, 370);
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setMaximumSize(470, 370);
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QLinearGradient gradient(QPointF(0, 0), QPointF(0, 370));
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gradient.setColorAt(0, QColor("#868482"));
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gradient.setColorAt(1, QColor("#5d5b59"));
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setBackgroundBrush(gradient);
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}
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//! [1]
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//! [3]
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void View::addItems()
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{
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int itemCount = itemTable->rowCount();
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int imageOffset = 150;
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int leftMargin = 70;
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int topMargin = 40;
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for (int i = 0; i < itemCount; i++) {
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ImageItem *image;
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QGraphicsTextItem *label;
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QSqlRecord record = itemTable->record(i);
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int id = record.value("id").toInt();
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QString file = record.value("file").toString();
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QString item = record.value("itemtype").toString();
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int columnOffset = ((i % 2) * 37);
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int x = ((i % 2) * imageOffset) + leftMargin + columnOffset;
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int y = ((i / 2) * imageOffset) + topMargin;
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image = new ImageItem(id, QPixmap(":/" + file));
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image->setData(0, i);
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image->setPos(x, y);
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scene->addItem(image);
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label = scene->addText(item);
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label->setDefaultTextColor(QColor("#d7d6d5"));
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QPointF labelOffset((120 - label->boundingRect().width()) / 2, 120.0);
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label->setPos(QPointF(x, y) + labelOffset);
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}
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}
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//! [3]
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//! [5]
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void View::mouseReleaseEvent(QMouseEvent *event)
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{
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if (QGraphicsItem *item = itemAt(event->pos())) {
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if (ImageItem *image = qgraphicsitem_cast<ImageItem *>(item))
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showInformation(image);
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}
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QGraphicsView::mouseReleaseEvent(event);
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}
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//! [5]
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//! [6]
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void View::showInformation(ImageItem *image)
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{
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int id = image->id();
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if (id < 0 || id >= itemTable->rowCount())
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return;
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InformationWindow *window = findWindow(id);
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if (window && window->isVisible()) {
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window->raise();
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window->activateWindow();
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} else if (window && !window->isVisible()) {
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window->show();
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} else {
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InformationWindow *window;
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window = new InformationWindow(id, itemTable, this);
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connect(window, SIGNAL(imageChanged(int,QString)),
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this, SLOT(updateImage(int,QString)));
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window->move(pos() + QPoint(20, 40));
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window->show();
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informationWindows.append(window);
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}
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}
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//! [6]
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//! [7]
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void View::updateImage(int id, const QString &fileName)
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{
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QList<QGraphicsItem *> items = scene->items();
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while(!items.empty()) {
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QGraphicsItem *item = items.takeFirst();
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if (ImageItem *image = qgraphicsitem_cast<ImageItem *>(item)) {
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if (image->id() == id){
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image->setPixmap(QPixmap(":/" +fileName));
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image->adjust();
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break;
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}
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}
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}
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}
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//! [7]
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//! [8]
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InformationWindow* View::findWindow(int id)
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{
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QList<InformationWindow*>::iterator i, beginning, end;
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beginning = informationWindows.begin();
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end = informationWindows.end();
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for (i = beginning; i != end; ++i) {
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InformationWindow *window = (*i);
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if (window && (window->id() == id))
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return window;
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}
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return 0;
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}
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//! [8]
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