author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Thu, 27 May 2010 12:46:08 +0300 | |
changeset 51 | 4785f57bf3d4 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: Example of home screen widget |
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* |
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*/ |
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#include <qtDebug> |
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#include <QGraphicsLinearLayout> |
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#include <HbPushButton> |
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#include <HbSlider> |
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#include <QGraphicsSceneMouseEvent> |
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#include <QGraphicsRectItem> |
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#include "pannablewidget.h" |
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/*! |
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\ingroup group_pannablewidget |
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\class PannableWidget |
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\brief Example implementation for pannable home screen widget. |
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Pannable widget demostrates usage of horizontal pan gesture instead of Home Screen using it for |
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page change. |
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To enable horizontal pan gesture widget need to implement isPannable() function. Widget should return true if pannable item's |
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pan region contains event position. |
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*/ |
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const int ItemName = 0xfffe; |
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/*! |
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Constructs a widget which is a child of \a parent, with widget flags set to \a flags. |
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*/ |
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PannableWidget::PannableWidget(QGraphicsItem* parent, Qt::WindowFlags flags) |
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: HbWidget(parent, flags) |
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{ |
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QGraphicsLinearLayout *layout = new QGraphicsLinearLayout(Qt::Vertical); |
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layout->setContentsMargins(0.0, 0.0, 0.0, 0.0); |
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setLayout(layout); |
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HbPushButton *button = new HbPushButton("Jenson Button"); |
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button->setPreferredSize(QSizeF(200.0,20.0)); |
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layout->addItem(button); |
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HbSlider *slider = new HbSlider(Qt::Horizontal); |
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slider->setData(ItemName,QLatin1String("slider")); |
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slider->setRange(0,10); |
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slider->setValue(5); |
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layout->addItem(slider); |
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QGraphicsRectItem *background = new QGraphicsRectItem(); |
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background->setBrush(QBrush(QColor(0x9acd32))); |
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setBackgroundItem(background); |
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resize(200.0, 100.0); |
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background->setRect(rect()); |
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} |
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/*! |
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Destructor |
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*/ |
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PannableWidget::~PannableWidget() |
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{ |
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} |
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/*! |
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Called by Home Screen when pan event is recognized. Given \a event |
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can be used to check whether pannable item contains event position. |
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*/ |
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bool PannableWidget::isPannable(QGraphicsSceneMouseEvent *event) |
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{ |
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bool ret(false); |
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// Take position in scene coordinates |
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QPointF position = event->buttonDownScenePos(Qt::LeftButton); |
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// find pannable item |
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QGraphicsItem* item = findChildItemByName(this,"slider"); |
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// check whether it is event is inside it |
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if (item && item->sceneBoundingRect().contains(position)) { |
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ret = true; |
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} |
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return ret; |
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} |
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/*! |
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Find \a item childs by given \a name. Uses recursion. |
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*/ |
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QGraphicsItem *PannableWidget::findChildItemByName(QGraphicsItem *item, const QString &name) |
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{ |
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if (!item) return NULL; |
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QList<QGraphicsItem *> children = item->childItems(); |
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foreach (QGraphicsItem *child, children) { |
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if(name == child->data(ItemName).toString()) { |
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return child; |
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} |
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} |
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// do recursive search |
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foreach (QGraphicsItem *child, children) { |
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QGraphicsItem* itemFromChild = findChildItemByName(child,name); |
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if (itemFromChild) { |
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return itemFromChild; |
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} |
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} |
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return NULL; |
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} |
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118 |
|
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119 |
|
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120 |
/*! |
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Called when widget is shown in the home screen |
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*/ |
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void PannableWidget::onShow() |
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{ |
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} |
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|
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/*! |
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Called when widget is hidden from the home screen |
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*/ |
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void PannableWidget::onHide() |
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{ |
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} |