Weather: scroll bar.

Signed-off-by: Luiz Agostini <luiz.agostini@openbossa.org>

8 files changed, 173 insertions, 2 deletions

diff --git a/weather/bootmanager.cpp b/weather/bootmanager.cpp
index 0280cbe..dbe2da6 100644
--- a/weather/bootmanager.cpp
+++ b/weather/bootmanager.cpp
@@ -9,6 +9,7 @@
 #include "cityinfodisplay.h"
 #include "titlebar.h"
 #include "citycarroussel.h"
+#include "scrollbar.h"
 
 #include <QDebug>
 
@@ -34,6 +35,7 @@ void BootManager::run()
     count += CityInfoDisplay::loadImages();
     count += TitleBar::loadImages();
     count += CityCarroussel::loadImages();
+    count += ScrollBar::loadImages();
 
     m_imagesLoaded = count == 0;
     if (m_imagesLoaded)
diff --git a/weather/images/ui_elements/scroll.png b/weather/images/ui_elements/scroll.png
deleted file mode 100644
index 376e223..0000000
--- a/weather/images/ui_elements/scroll.png
+++ /dev/null
diff --git a/weather/images/weather_elements/scroll.png b/weather/images/weather_elements/scroll.png
new file mode 100644
index 0000000..ff83da6
--- /dev/null
+++ b/weather/images/weather_elements/scroll.png
diff --git a/weather/images/ui_elements/scroll_knob.png b/weather/images/weather_elements/scroll_knob.png
index 9a6bc28..9a6bc28 100644
--- a/weather/images/ui_elements/scroll_knob.png
+++ b/weather/images/weather_elements/scroll_knob.png
diff --git a/weather/resources.qrc b/weather/resources.qrc
index d46c599..c2adf4d 100644
--- a/weather/resources.qrc
+++ b/weather/resources.qrc
@@ -95,5 +95,7 @@
         <file>images/weather_elements/list_item_selected_bg.png</file>
         <file>images/weather_elements/textfield_add_city.png</file>
         <file>images/weather_elements/list_top.png</file>
+        <file>images/weather_elements/scroll.png</file>
+        <file>images/weather_elements/scroll_knob.png</file>
     </qresource>
 </RCC>
diff --git a/weather/scrollbar.cpp b/weather/scrollbar.cpp
new file mode 100644
index 0000000..5fc1264
--- /dev/null
+++ b/weather/scrollbar.cpp
@@ -0,0 +1,100 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: openBossa - INdT (renato.chencarek@openbossa.org)
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** the openBossa stream from INdT (renato.chencarek@openbossa.org).
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QPropertyAnimation>
+#include <QDebug>
+
+#include "scrollbar.h"
+#include "pixmaploader.h"
+
+ScrollBar::ScrollBar(QGraphicsItem* parent)
+    : QGraphicsPixmapItem(PixmapLoader::getPic("scroll"), parent)
+    , m_knob(PixmapLoader::getPic("scroll_knob"), this)
+    , m_height(pixmap().height() - m_knob.pixmap().height())
+    , m_value(0.0)
+    , m_visible(false)
+{
+    hide();
+    setOpacity(0.0);
+    m_knob.setPos(0.0, 0.0);
+    m_timer.setSingleShot(true);
+    m_timer.setInterval(1000);
+
+    connect(&m_timer, SIGNAL(timeout()), this, SLOT(timeout()));
+}
+
+int ScrollBar::loadImages()
+{
+    PixmapLoader::load("scroll");
+    PixmapLoader::load("scroll_knob");
+    return 2;
+}
+bool ScrollBar::startAnimation(bool show)
+{
+    if (show == m_visible)
+        return false;
+
+    m_visible = show;
+    m_timer.stop();
+
+    if (m_animation)
+        m_animation->stop();
+
+    QPropertyAnimation* animation = new QPropertyAnimation(this, "opacity");
+    animation->setEasingCurve(QEasingCurve::OutExpo);
+    animation->setDuration(500);
+    animation->setEndValue(show ? 1.0 : 0.0);
+
+    if (show)
+        connect(animation, SIGNAL(finished()), &m_timer, SLOT(start()));
+    else
+        connect(animation, SIGNAL(finished()), this, SLOT(hideScrollBar()));
+
+    m_animation = animation;
+    animation->start(QAbstractAnimation::DeleteWhenStopped);
+    return true;
+}
+
+void ScrollBar::setValue(qreal value)
+{
+    if (value < 0 || value > 1.0)
+        return;
+    m_value = value;
+    m_knob.setPos(0, m_value * m_height);
+
+    show();
+    if (!startAnimation(true))
+        m_timer.start();
+}
+
+
+
+
diff --git a/weather/scrollbar.h b/weather/scrollbar.h
new file mode 100644
index 0000000..fb509d7
--- /dev/null
+++ b/weather/scrollbar.h
@@ -0,0 +1,65 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: openBossa - INdT (renato.chencarek@openbossa.org)
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** the openBossa stream from INdT (renato.chencarek@openbossa.org).
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef SCROLLBAR_H
+#define SCROLLBAR_H
+
+#include <QTimer>
+#include <QPointer>
+#include <QGraphicsPixmapItem>
+#include <QAbstractAnimation>
+
+class ScrollBar: public QObject, public QGraphicsPixmapItem
+{
+    Q_OBJECT
+    Q_PROPERTY(qreal opacity READ opacity WRITE setOpacity);
+public:
+    ScrollBar(QGraphicsItem* parent = 0);
+    qreal value() const { return m_value; }
+    void setValue(qreal);
+    static int loadImages();
+
+private slots:
+    void timeout() { startAnimation(false); }
+    void hideScrollBar() { hide(); }
+
+private:
+    QGraphicsPixmapItem m_knob;
+    const qreal m_height;
+    qreal m_value;
+    QTimer m_timer;
+    QPointer<QAbstractAnimation> m_animation;
+    bool m_visible;
+
+    bool startAnimation(bool show);
+};
+
+#endif /* SCROLLBAR_H */
diff --git a/weather/weather.pro b/weather/weather.pro
index 7f73e2b..218579d 100644
--- a/weather/weather.pro
+++ b/weather/weather.pro
@@ -44,7 +44,8 @@ HEADERS += mainview.h \
     forecastprovider.h \
     forecastdata.h \
     bootmanager.h \
-    pixmapbutton.h
+    pixmapbutton.h \
+    scrollbar.h
 SOURCES += mainview.cpp \
     main.cpp \
     settings.cpp \
@@ -61,4 +62,5 @@ SOURCES += mainview.cpp \
     loading.cpp \
     forecastprovider.cpp \
     bootmanager.cpp \
-    pixmapbutton.cpp
+    pixmapbutton.cpp \
+    scrollbar.cpp