1 /*

     2 * Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  Example of home screen widget

    15 *

    16 */

    17 #include <qtDebug>

    18 

    19 #include <QGraphicsLinearLayout>

    20 #include <HbPushButton>

    21 #include <HbSlider>

    22 #include <QGraphicsSceneMouseEvent>

    23 #include <QGraphicsRectItem>

    24 #include "pannablewidget.h"

    25 

    26 

    27 

    28 /*!

    29     \ingroup group_pannablewidget

    30     \class PannableWidget

    31     \brief Example implementation for pannable home screen widget.

    32 

    33     Pannable widget demostrates usage of horizontal pan gesture instead of Home Screen using it for

    34     page change.

    35     

    36     To enable horizontal pan gesture widget need to implement isPannable() function. Widget should return true if pannable item's

    37     pan region contains event position.  

    38 */

    39 

    40 

    41 const int ItemName = 0xfffe;

    42 

    43 /*!

    44     Constructs a widget which is a child of \a parent, with widget flags set to \a flags.

    45 */

    46 PannableWidget::PannableWidget(QGraphicsItem* parent, Qt::WindowFlags flags)

    47     : HbWidget(parent, flags)

    48 {

    49     QGraphicsLinearLayout *layout = new QGraphicsLinearLayout(Qt::Vertical);

    50     layout->setContentsMargins(0.0, 0.0, 0.0, 0.0);

    51     setLayout(layout);

    52     

    53     HbPushButton *button = new HbPushButton("Jenson Button");

    54     button->setPreferredSize(QSizeF(200.0,20.0));

    55     layout->addItem(button);

    56 

    57     HbSlider *slider = new HbSlider(Qt::Horizontal);

    58     slider->setData(ItemName,QLatin1String("slider"));

    59     slider->setRange(0,10);

    60     slider->setValue(5);

    61     layout->addItem(slider);

    62 

    63     

    64     QGraphicsRectItem *background = new QGraphicsRectItem();

    65     background->setBrush(QBrush(QColor(0x9acd32)));

    66     setBackgroundItem(background);

    67     

    68     resize(200.0, 100.0);

    69     background->setRect(rect());

    70 

    71 }

    72 

    73 /*!

    74     Destructor

    75 */

    76 PannableWidget::~PannableWidget()

    77 {

    78 }

    79 /*!

    80     Called by Home Screen when pan event is recognized. Given \a event

    81     can be used to check whether pannable item contains event position.

    82 */

    83 bool PannableWidget::isPannable(QGraphicsSceneMouseEvent *event)

    84 {

    85     bool ret(false);

    86     // Take position in scene coordinates

    87     QPointF position = event->buttonDownScenePos(Qt::LeftButton);

    88     // find pannable item

    89     QGraphicsItem* item = findChildItemByName(this,"slider");

    90     // check whether it is event is inside it

    91     if (item && item->sceneBoundingRect().contains(position)) {

    92         ret = true;

    93     }

    94     return ret;

    95 }

    96 /*!

    97     Find \a item childs by given \a name. Uses recursion.

    98 */

    99 QGraphicsItem *PannableWidget::findChildItemByName(QGraphicsItem *item, const QString &name)

   100 {

   101     if (!item) return NULL;

   102 

   103     QList<QGraphicsItem *> children = item->childItems();

   104     foreach (QGraphicsItem *child, children) {

   105         if(name == child->data(ItemName).toString()) {

   106             return child;

   107         }

   108     }

   109     // do recursive search

   110     foreach (QGraphicsItem *child, children) {

   111         QGraphicsItem* itemFromChild = findChildItemByName(child,name);

   112         if (itemFromChild) {

   113             return itemFromChild;

   114         }

   115     }

   116     return NULL;

   117 }

   118 

   119 

   120 /*!

   121     Called when widget is shown in the home screen

   122 */

   123 void PannableWidget::onShow()

   124 {

   125 }

   126 

   127 /*!

   128     Called when widget is hidden from the home screen

   129 */

   130 void PannableWidget::onHide()

   131 {

   132 }