605 lines
55 KiB
HTML
605 lines
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<h1 class="title">flickcharm.cpp Example File</h1>
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<span class="small-subtitle">demos/embedded/anomaly/src/flickcharm.cpp</span>
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<!-- $$$demos/embedded/anomaly/src/flickcharm.cpp-description -->
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<div class="descr"> <a name="details"></a>
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<pre class="cpp"> <span class="comment">/****************************************************************************
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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 demos of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see http://www.qt.io/terms-conditions. For further
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** information use the contact form at http://www.qt.io/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 or version 3 as published by the Free
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** Software Foundation and appearing in the file LICENSE.LGPLv21 and
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** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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** following information to ensure the GNU Lesser General Public License
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** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** As a special exception, The Qt Company gives you certain additional
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** rights. These rights are described in The Qt Company LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/</span>
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<span class="preprocessor">#include "flickcharm.h"</span>
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<span class="preprocessor">#include <QAbstractScrollArea></span>
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<span class="preprocessor">#include <QApplication></span>
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<span class="preprocessor">#include <QBasicTimer></span>
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<span class="preprocessor">#include <QEvent></span>
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<span class="preprocessor">#include <QHash></span>
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<span class="preprocessor">#include <QList></span>
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<span class="preprocessor">#include <QMouseEvent></span>
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<span class="preprocessor">#include <QScrollBar></span>
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<span class="preprocessor">#include <QTime></span>
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<span class="preprocessor">#include <QWebFrame></span>
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<span class="preprocessor">#include <QWebView></span>
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<span class="preprocessor">#include <QDebug></span>
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<span class="keyword">const</span> <span class="type">int</span> fingerAccuracyThreshold <span class="operator">=</span> <span class="number">3</span>;
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<span class="keyword">struct</span> FlickData {
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<span class="keyword">typedef</span> <span class="keyword">enum</span> {
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Steady<span class="operator">,</span> <span class="comment">// Interaction without scrolling</span>
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ManualScroll<span class="operator">,</span> <span class="comment">// Scrolling manually with the finger on the screen</span>
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AutoScroll<span class="operator">,</span> <span class="comment">// Scrolling automatically</span>
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AutoScrollAcceleration <span class="comment">// Scrolling automatically but a finger is on the screen</span>
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} State;
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State state;
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<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>widget;
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<span class="type"><a href="qpoint.html">QPoint</a></span> pressPos;
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<span class="type"><a href="qpoint.html">QPoint</a></span> lastPos;
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<span class="type"><a href="qpoint.html">QPoint</a></span> speed;
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<span class="type"><a href="qtime.html">QTime</a></span> speedTimer;
|
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<span class="type"><a href="qlist.html">QList</a></span><span class="operator"><</span><span class="type"><a href="qevent.html">QEvent</a></span><span class="operator">*</span><span class="operator">></span> ignored;
|
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<span class="type"><a href="qtime.html">QTime</a></span> accelerationTimer;
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<span class="type">bool</span> lastPosValid:<span class="number">1</span>;
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<span class="type">bool</span> waitingAcceleration:<span class="number">1</span>;
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FlickData()
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: lastPosValid(<span class="keyword">false</span>)
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<span class="operator">,</span> waitingAcceleration(<span class="keyword">false</span>)
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{}
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<span class="type">void</span> resetSpeed()
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{
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speed <span class="operator">=</span> <span class="type"><a href="qpoint.html">QPoint</a></span>();
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lastPosValid <span class="operator">=</span> <span class="keyword">false</span>;
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}
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<span class="type">void</span> updateSpeed(<span class="keyword">const</span> <span class="type"><a href="qpoint.html">QPoint</a></span> <span class="operator">&</span>newPosition)
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{
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<span class="keyword">if</span> (lastPosValid) {
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<span class="keyword">const</span> <span class="type">int</span> timeElapsed <span class="operator">=</span> speedTimer<span class="operator">.</span>elapsed();
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<span class="keyword">if</span> (timeElapsed) {
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<span class="keyword">const</span> <span class="type"><a href="qpoint.html">QPoint</a></span> newPixelDiff <span class="operator">=</span> (newPosition <span class="operator">-</span> lastPos);
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<span class="keyword">const</span> <span class="type"><a href="qpoint.html">QPoint</a></span> pixelsPerSecond <span class="operator">=</span> newPixelDiff <span class="operator">*</span> (<span class="number">1000</span> <span class="operator">/</span> timeElapsed);
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<span class="comment">// fingers are inacurates, we ignore small changes to avoid stopping the autoscroll because</span>
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<span class="comment">// of a small horizontal offset when scrolling vertically</span>
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<span class="keyword">const</span> <span class="type">int</span> newSpeedY <span class="operator">=</span> (<a href="qtglobal.html#qAbs">qAbs</a>(pixelsPerSecond<span class="operator">.</span>y()) <span class="operator">></span> fingerAccuracyThreshold) <span class="operator">?</span> pixelsPerSecond<span class="operator">.</span>y() : <span class="number">0</span>;
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<span class="keyword">const</span> <span class="type">int</span> newSpeedX <span class="operator">=</span> (<a href="qtglobal.html#qAbs">qAbs</a>(pixelsPerSecond<span class="operator">.</span>x()) <span class="operator">></span> fingerAccuracyThreshold) <span class="operator">?</span> pixelsPerSecond<span class="operator">.</span>x() : <span class="number">0</span>;
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|
<span class="keyword">if</span> (state <span class="operator">=</span><span class="operator">=</span> AutoScrollAcceleration) {
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<span class="keyword">const</span> <span class="type">int</span> max <span class="operator">=</span> <span class="number">4000</span>; <span class="comment">// px by seconds</span>
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<span class="keyword">const</span> <span class="type">int</span> oldSpeedY <span class="operator">=</span> speed<span class="operator">.</span>y();
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<span class="keyword">const</span> <span class="type">int</span> oldSpeedX <span class="operator">=</span> speed<span class="operator">.</span>x();
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<span class="keyword">if</span> ((oldSpeedY <span class="operator"><</span><span class="operator">=</span> <span class="number">0</span> <span class="operator">&</span><span class="operator">&</span> newSpeedY <span class="operator"><</span><span class="operator">=</span> <span class="number">0</span>) <span class="operator">|</span><span class="operator">|</span> (oldSpeedY <span class="operator">></span><span class="operator">=</span> <span class="number">0</span> <span class="operator">&</span><span class="operator">&</span> newSpeedY <span class="operator">></span><span class="operator">=</span> <span class="number">0</span>)
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<span class="operator">&</span><span class="operator">&</span> (oldSpeedX <span class="operator"><</span><span class="operator">=</span> <span class="number">0</span> <span class="operator">&</span><span class="operator">&</span> newSpeedX <span class="operator"><</span><span class="operator">=</span> <span class="number">0</span>) <span class="operator">|</span><span class="operator">|</span> (oldSpeedX <span class="operator">></span><span class="operator">=</span> <span class="number">0</span> <span class="operator">&</span><span class="operator">&</span> newSpeedX <span class="operator">></span><span class="operator">=</span> <span class="number">0</span>)) {
|
|
speed<span class="operator">.</span>setY(<a href="qtglobal.html#qBound">qBound</a>(<span class="operator">-</span>max<span class="operator">,</span> (oldSpeedY <span class="operator">+</span> (newSpeedY <span class="operator">/</span> <span class="number">4</span>))<span class="operator">,</span> max));
|
|
speed<span class="operator">.</span>setX(<a href="qtglobal.html#qBound">qBound</a>(<span class="operator">-</span>max<span class="operator">,</span> (oldSpeedX <span class="operator">+</span> (newSpeedX <span class="operator">/</span> <span class="number">4</span>))<span class="operator">,</span> max));
|
|
} <span class="keyword">else</span> {
|
|
speed <span class="operator">=</span> <span class="type"><a href="qpoint.html">QPoint</a></span>();
|
|
}
|
|
} <span class="keyword">else</span> {
|
|
<span class="keyword">const</span> <span class="type">int</span> max <span class="operator">=</span> <span class="number">2500</span>; <span class="comment">// px by seconds</span>
|
|
<span class="comment">// we average the speed to avoid strange effects with the last delta</span>
|
|
<span class="keyword">if</span> (<span class="operator">!</span>speed<span class="operator">.</span>isNull()) {
|
|
speed<span class="operator">.</span>setX(<a href="qtglobal.html#qBound">qBound</a>(<span class="operator">-</span>max<span class="operator">,</span> (speed<span class="operator">.</span>x() <span class="operator">/</span> <span class="number">4</span>) <span class="operator">+</span> (newSpeedX <span class="operator">*</span> <span class="number">3</span> <span class="operator">/</span> <span class="number">4</span>)<span class="operator">,</span> max));
|
|
speed<span class="operator">.</span>setY(<a href="qtglobal.html#qBound">qBound</a>(<span class="operator">-</span>max<span class="operator">,</span> (speed<span class="operator">.</span>y() <span class="operator">/</span> <span class="number">4</span>) <span class="operator">+</span> (newSpeedY <span class="operator">*</span> <span class="number">3</span> <span class="operator">/</span> <span class="number">4</span>)<span class="operator">,</span> max));
|
|
} <span class="keyword">else</span> {
|
|
speed <span class="operator">=</span> <span class="type"><a href="qpoint.html">QPoint</a></span>(newSpeedX<span class="operator">,</span> newSpeedY);
|
|
}
|
|
}
|
|
}
|
|
} <span class="keyword">else</span> {
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|
lastPosValid <span class="operator">=</span> <span class="keyword">true</span>;
|
|
}
|
|
speedTimer<span class="operator">.</span>start();
|
|
lastPos <span class="operator">=</span> newPosition;
|
|
}
|
|
|
|
<span class="comment">// scroll by dx, dy</span>
|
|
<span class="comment">// return true if the widget was scrolled</span>
|
|
<span class="type">bool</span> scrollWidget(<span class="keyword">const</span> <span class="type">int</span> dx<span class="operator">,</span> <span class="keyword">const</span> <span class="type">int</span> dy)
|
|
{
|
|
<span class="type"><a href="qabstractscrollarea.html">QAbstractScrollArea</a></span> <span class="operator">*</span>scrollArea <span class="operator">=</span> qobject_cast<span class="operator"><</span><span class="type"><a href="qabstractscrollarea.html">QAbstractScrollArea</a></span><span class="operator">*</span><span class="operator">></span>(widget);
|
|
<span class="keyword">if</span> (scrollArea) {
|
|
<span class="keyword">const</span> <span class="type">int</span> x <span class="operator">=</span> scrollArea<span class="operator">-</span><span class="operator">></span>horizontalScrollBar()<span class="operator">-</span><span class="operator">></span>value();
|
|
<span class="keyword">const</span> <span class="type">int</span> y <span class="operator">=</span> scrollArea<span class="operator">-</span><span class="operator">></span>verticalScrollBar()<span class="operator">-</span><span class="operator">></span>value();
|
|
scrollArea<span class="operator">-</span><span class="operator">></span>horizontalScrollBar()<span class="operator">-</span><span class="operator">></span>setValue(x <span class="operator">-</span> dx);
|
|
scrollArea<span class="operator">-</span><span class="operator">></span>verticalScrollBar()<span class="operator">-</span><span class="operator">></span>setValue(y <span class="operator">-</span> dy);
|
|
<span class="keyword">return</span> (scrollArea<span class="operator">-</span><span class="operator">></span>horizontalScrollBar()<span class="operator">-</span><span class="operator">></span>value() <span class="operator">!</span><span class="operator">=</span> x
|
|
<span class="operator">|</span><span class="operator">|</span> scrollArea<span class="operator">-</span><span class="operator">></span>verticalScrollBar()<span class="operator">-</span><span class="operator">></span>value() <span class="operator">!</span><span class="operator">=</span> y);
|
|
}
|
|
|
|
<span class="type"><a href="qwebview.html">QWebView</a></span> <span class="operator">*</span>webView <span class="operator">=</span> qobject_cast<span class="operator"><</span><span class="type"><a href="qwebview.html">QWebView</a></span><span class="operator">*</span><span class="operator">></span>(widget);
|
|
<span class="keyword">if</span> (webView) {
|
|
<span class="type"><a href="qwebframe.html">QWebFrame</a></span> <span class="operator">*</span>frame <span class="operator">=</span> webView<span class="operator">-</span><span class="operator">></span>page()<span class="operator">-</span><span class="operator">></span>mainFrame();
|
|
<span class="keyword">const</span> <span class="type"><a href="qpoint.html">QPoint</a></span> position <span class="operator">=</span> frame<span class="operator">-</span><span class="operator">></span>scrollPosition();
|
|
frame<span class="operator">-</span><span class="operator">></span>setScrollPosition(position <span class="operator">-</span> <span class="type"><a href="qpoint.html">QPoint</a></span>(dx<span class="operator">,</span> dy));
|
|
<span class="keyword">return</span> frame<span class="operator">-</span><span class="operator">></span>scrollPosition() <span class="operator">!</span><span class="operator">=</span> position;
|
|
}
|
|
<span class="keyword">return</span> <span class="keyword">false</span>;
|
|
}
|
|
|
|
<span class="type">bool</span> scrollTo(<span class="keyword">const</span> <span class="type"><a href="qpoint.html">QPoint</a></span> <span class="operator">&</span>newPosition)
|
|
{
|
|
<span class="keyword">const</span> <span class="type"><a href="qpoint.html">QPoint</a></span> delta <span class="operator">=</span> newPosition <span class="operator">-</span> lastPos;
|
|
updateSpeed(newPosition);
|
|
<span class="keyword">return</span> scrollWidget(delta<span class="operator">.</span>x()<span class="operator">,</span> delta<span class="operator">.</span>y());
|
|
}
|
|
};
|
|
|
|
<span class="keyword">class</span> FlickCharmPrivate
|
|
{
|
|
<span class="keyword">public</span>:
|
|
<span class="type"><a href="qhash.html">QHash</a></span><span class="operator"><</span><span class="type"><a href="qwidget.html">QWidget</a></span><span class="operator">*</span><span class="operator">,</span> FlickData<span class="operator">*</span><span class="operator">></span> flickData;
|
|
<span class="type"><a href="qbasictimer.html">QBasicTimer</a></span> ticker;
|
|
<span class="type"><a href="qtime.html">QTime</a></span> timeCounter;
|
|
<span class="type">void</span> startTicker(<span class="type"><a href="qobject.html">QObject</a></span> <span class="operator">*</span>object)
|
|
{
|
|
<span class="keyword">if</span> (<span class="operator">!</span>ticker<span class="operator">.</span>isActive())
|
|
ticker<span class="operator">.</span>start(<span class="number">15</span><span class="operator">,</span> object);
|
|
timeCounter<span class="operator">.</span>start();
|
|
}
|
|
};
|
|
|
|
FlickCharm<span class="operator">::</span>FlickCharm(<span class="type"><a href="qobject.html">QObject</a></span> <span class="operator">*</span>parent): <span class="type"><a href="qobject.html">QObject</a></span>(parent)
|
|
{
|
|
d <span class="operator">=</span> <span class="keyword">new</span> FlickCharmPrivate;
|
|
}
|
|
|
|
FlickCharm<span class="operator">::</span><span class="operator">~</span>FlickCharm()
|
|
{
|
|
<span class="keyword">delete</span> d;
|
|
}
|
|
|
|
<span class="type">void</span> FlickCharm<span class="operator">::</span>activateOn(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>widget)
|
|
{
|
|
<span class="type"><a href="qabstractscrollarea.html">QAbstractScrollArea</a></span> <span class="operator">*</span>scrollArea <span class="operator">=</span> qobject_cast<span class="operator"><</span><span class="type"><a href="qabstractscrollarea.html">QAbstractScrollArea</a></span><span class="operator">*</span><span class="operator">></span>(widget);
|
|
<span class="keyword">if</span> (scrollArea) {
|
|
scrollArea<span class="operator">-</span><span class="operator">></span>setHorizontalScrollBarPolicy(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>ScrollBarAlwaysOff);
|
|
scrollArea<span class="operator">-</span><span class="operator">></span>setVerticalScrollBarPolicy(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>ScrollBarAlwaysOff);
|
|
|
|
<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>viewport <span class="operator">=</span> scrollArea<span class="operator">-</span><span class="operator">></span>viewport();
|
|
|
|
viewport<span class="operator">-</span><span class="operator">></span>installEventFilter(<span class="keyword">this</span>);
|
|
scrollArea<span class="operator">-</span><span class="operator">></span>installEventFilter(<span class="keyword">this</span>);
|
|
|
|
d<span class="operator">-</span><span class="operator">></span>flickData<span class="operator">.</span>remove(viewport);
|
|
d<span class="operator">-</span><span class="operator">></span>flickData<span class="operator">[</span>viewport<span class="operator">]</span> <span class="operator">=</span> <span class="keyword">new</span> FlickData;
|
|
d<span class="operator">-</span><span class="operator">></span>flickData<span class="operator">[</span>viewport<span class="operator">]</span><span class="operator">-</span><span class="operator">></span>widget <span class="operator">=</span> widget;
|
|
d<span class="operator">-</span><span class="operator">></span>flickData<span class="operator">[</span>viewport<span class="operator">]</span><span class="operator">-</span><span class="operator">></span>state <span class="operator">=</span> FlickData<span class="operator">::</span>Steady;
|
|
|
|
<span class="keyword">return</span>;
|
|
}
|
|
|
|
<span class="type"><a href="qwebview.html">QWebView</a></span> <span class="operator">*</span>webView <span class="operator">=</span> qobject_cast<span class="operator"><</span><span class="type"><a href="qwebview.html">QWebView</a></span><span class="operator">*</span><span class="operator">></span>(widget);
|
|
<span class="keyword">if</span> (webView) {
|
|
<span class="type"><a href="qwebframe.html">QWebFrame</a></span> <span class="operator">*</span>frame <span class="operator">=</span> webView<span class="operator">-</span><span class="operator">></span>page()<span class="operator">-</span><span class="operator">></span>mainFrame();
|
|
frame<span class="operator">-</span><span class="operator">></span>setScrollBarPolicy(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Vertical<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>ScrollBarAlwaysOff);
|
|
frame<span class="operator">-</span><span class="operator">></span>setScrollBarPolicy(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Horizontal<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>ScrollBarAlwaysOff);
|
|
|
|
webView<span class="operator">-</span><span class="operator">></span>installEventFilter(<span class="keyword">this</span>);
|
|
|
|
d<span class="operator">-</span><span class="operator">></span>flickData<span class="operator">.</span>remove(webView);
|
|
d<span class="operator">-</span><span class="operator">></span>flickData<span class="operator">[</span>webView<span class="operator">]</span> <span class="operator">=</span> <span class="keyword">new</span> FlickData;
|
|
d<span class="operator">-</span><span class="operator">></span>flickData<span class="operator">[</span>webView<span class="operator">]</span><span class="operator">-</span><span class="operator">></span>widget <span class="operator">=</span> webView;
|
|
d<span class="operator">-</span><span class="operator">></span>flickData<span class="operator">[</span>webView<span class="operator">]</span><span class="operator">-</span><span class="operator">></span>state <span class="operator">=</span> FlickData<span class="operator">::</span>Steady;
|
|
|
|
<span class="keyword">return</span>;
|
|
}
|
|
|
|
<a href="qtglobal.html#qWarning">qWarning</a>() <span class="operator"><</span><span class="operator"><</span> <span class="string">"FlickCharm only works on QAbstractScrollArea (and derived classes)"</span>;
|
|
<a href="qtglobal.html#qWarning">qWarning</a>() <span class="operator"><</span><span class="operator"><</span> <span class="string">"or QWebView (and derived classes)"</span>;
|
|
}
|
|
|
|
<span class="type">void</span> FlickCharm<span class="operator">::</span>deactivateFrom(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>widget)
|
|
{
|
|
<span class="type"><a href="qabstractscrollarea.html">QAbstractScrollArea</a></span> <span class="operator">*</span>scrollArea <span class="operator">=</span> qobject_cast<span class="operator"><</span><span class="type"><a href="qabstractscrollarea.html">QAbstractScrollArea</a></span><span class="operator">*</span><span class="operator">></span>(widget);
|
|
<span class="keyword">if</span> (scrollArea) {
|
|
<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>viewport <span class="operator">=</span> scrollArea<span class="operator">-</span><span class="operator">></span>viewport();
|
|
|
|
viewport<span class="operator">-</span><span class="operator">></span>removeEventFilter(<span class="keyword">this</span>);
|
|
scrollArea<span class="operator">-</span><span class="operator">></span>removeEventFilter(<span class="keyword">this</span>);
|
|
|
|
<span class="keyword">delete</span> d<span class="operator">-</span><span class="operator">></span>flickData<span class="operator">[</span>viewport<span class="operator">]</span>;
|
|
d<span class="operator">-</span><span class="operator">></span>flickData<span class="operator">.</span>remove(viewport);
|
|
|
|
<span class="keyword">return</span>;
|
|
}
|
|
|
|
<span class="type"><a href="qwebview.html">QWebView</a></span> <span class="operator">*</span>webView <span class="operator">=</span> qobject_cast<span class="operator"><</span><span class="type"><a href="qwebview.html">QWebView</a></span><span class="operator">*</span><span class="operator">></span>(widget);
|
|
<span class="keyword">if</span> (webView) {
|
|
webView<span class="operator">-</span><span class="operator">></span>removeEventFilter(<span class="keyword">this</span>);
|
|
|
|
<span class="keyword">delete</span> d<span class="operator">-</span><span class="operator">></span>flickData<span class="operator">[</span>webView<span class="operator">]</span>;
|
|
d<span class="operator">-</span><span class="operator">></span>flickData<span class="operator">.</span>remove(webView);
|
|
|
|
<span class="keyword">return</span>;
|
|
}
|
|
}
|
|
|
|
<span class="keyword">static</span> <span class="type"><a href="qpoint.html">QPoint</a></span> deaccelerate(<span class="keyword">const</span> <span class="type"><a href="qpoint.html">QPoint</a></span> <span class="operator">&</span>speed<span class="operator">,</span> <span class="keyword">const</span> <span class="type">int</span> deltatime)
|
|
{
|
|
<span class="keyword">const</span> <span class="type">int</span> deltaSpeed <span class="operator">=</span> deltatime;
|
|
|
|
<span class="type">int</span> x <span class="operator">=</span> speed<span class="operator">.</span>x();
|
|
<span class="type">int</span> y <span class="operator">=</span> speed<span class="operator">.</span>y();
|
|
x <span class="operator">=</span> (x <span class="operator">=</span><span class="operator">=</span> <span class="number">0</span>) <span class="operator">?</span> x : (x <span class="operator">></span> <span class="number">0</span>) <span class="operator">?</span> <a href="qtglobal.html#qMax">qMax</a>(<span class="number">0</span><span class="operator">,</span> x <span class="operator">-</span> deltaSpeed) : <a href="qtglobal.html#qMin">qMin</a>(<span class="number">0</span><span class="operator">,</span> x <span class="operator">+</span> deltaSpeed);
|
|
y <span class="operator">=</span> (y <span class="operator">=</span><span class="operator">=</span> <span class="number">0</span>) <span class="operator">?</span> y : (y <span class="operator">></span> <span class="number">0</span>) <span class="operator">?</span> <a href="qtglobal.html#qMax">qMax</a>(<span class="number">0</span><span class="operator">,</span> y <span class="operator">-</span> deltaSpeed) : <a href="qtglobal.html#qMin">qMin</a>(<span class="number">0</span><span class="operator">,</span> y <span class="operator">+</span> deltaSpeed);
|
|
<span class="keyword">return</span> <span class="type"><a href="qpoint.html">QPoint</a></span>(x<span class="operator">,</span> y);
|
|
}
|
|
|
|
<span class="type">bool</span> FlickCharm<span class="operator">::</span>eventFilter(<span class="type"><a href="qobject.html">QObject</a></span> <span class="operator">*</span>object<span class="operator">,</span> <span class="type"><a href="qevent.html">QEvent</a></span> <span class="operator">*</span>event)
|
|
{
|
|
<span class="keyword">if</span> (<span class="operator">!</span>object<span class="operator">-</span><span class="operator">></span>isWidgetType())
|
|
<span class="keyword">return</span> <span class="keyword">false</span>;
|
|
|
|
<span class="keyword">const</span> <span class="type"><a href="qevent.html">QEvent</a></span><span class="operator">::</span>Type type <span class="operator">=</span> event<span class="operator">-</span><span class="operator">></span>type();
|
|
|
|
<span class="keyword">switch</span> (type) {
|
|
<span class="keyword">case</span> <span class="type"><a href="qevent.html">QEvent</a></span><span class="operator">::</span>MouseButtonPress:
|
|
<span class="keyword">case</span> <span class="type"><a href="qevent.html">QEvent</a></span><span class="operator">::</span>MouseMove:
|
|
<span class="keyword">case</span> <span class="type"><a href="qevent.html">QEvent</a></span><span class="operator">::</span>MouseButtonRelease:
|
|
<span class="keyword">break</span>;
|
|
<span class="keyword">case</span> <span class="type"><a href="qevent.html">QEvent</a></span><span class="operator">::</span>MouseButtonDblClick: <span class="comment">// skip double click</span>
|
|
<span class="keyword">return</span> <span class="keyword">true</span>;
|
|
<span class="keyword">default</span>:
|
|
<span class="keyword">return</span> <span class="keyword">false</span>;
|
|
}
|
|
|
|
<span class="type"><a href="qmouseevent.html">QMouseEvent</a></span> <span class="operator">*</span>mouseEvent <span class="operator">=</span> <span class="keyword">static_cast</span><span class="operator"><</span><span class="type"><a href="qmouseevent.html">QMouseEvent</a></span><span class="operator">*</span><span class="operator">></span>(event);
|
|
<span class="keyword">if</span> (type <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qevent.html">QEvent</a></span><span class="operator">::</span>MouseMove <span class="operator">&</span><span class="operator">&</span> mouseEvent<span class="operator">-</span><span class="operator">></span>buttons() <span class="operator">!</span><span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>LeftButton)
|
|
<span class="keyword">return</span> <span class="keyword">false</span>;
|
|
|
|
<span class="keyword">if</span> (mouseEvent<span class="operator">-</span><span class="operator">></span>modifiers() <span class="operator">!</span><span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>NoModifier)
|
|
<span class="keyword">return</span> <span class="keyword">false</span>;
|
|
|
|
<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>viewport <span class="operator">=</span> qobject_cast<span class="operator"><</span><span class="type"><a href="qwidget.html">QWidget</a></span><span class="operator">*</span><span class="operator">></span>(object);
|
|
FlickData <span class="operator">*</span>data <span class="operator">=</span> d<span class="operator">-</span><span class="operator">></span>flickData<span class="operator">.</span>value(viewport);
|
|
<span class="keyword">if</span> (<span class="operator">!</span>viewport <span class="operator">|</span><span class="operator">|</span> <span class="operator">!</span>data <span class="operator">|</span><span class="operator">|</span> data<span class="operator">-</span><span class="operator">></span>ignored<span class="operator">.</span>removeAll(event))
|
|
<span class="keyword">return</span> <span class="keyword">false</span>;
|
|
|
|
<span class="keyword">const</span> <span class="type"><a href="qpoint.html">QPoint</a></span> mousePos <span class="operator">=</span> mouseEvent<span class="operator">-</span><span class="operator">></span>pos();
|
|
<span class="type">bool</span> consumed <span class="operator">=</span> <span class="keyword">false</span>;
|
|
<span class="keyword">switch</span> (data<span class="operator">-</span><span class="operator">></span>state) {
|
|
|
|
<span class="keyword">case</span> FlickData<span class="operator">::</span>Steady:
|
|
<span class="keyword">if</span> (type <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qevent.html">QEvent</a></span><span class="operator">::</span>MouseButtonPress) {
|
|
consumed <span class="operator">=</span> <span class="keyword">true</span>;
|
|
data<span class="operator">-</span><span class="operator">></span>pressPos <span class="operator">=</span> mousePos;
|
|
} <span class="keyword">else</span> <span class="keyword">if</span> (type <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qevent.html">QEvent</a></span><span class="operator">::</span>MouseButtonRelease) {
|
|
consumed <span class="operator">=</span> <span class="keyword">true</span>;
|
|
<span class="type"><a href="qmouseevent.html">QMouseEvent</a></span> <span class="operator">*</span>event1 <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qmouseevent.html">QMouseEvent</a></span>(<span class="type"><a href="qevent.html">QEvent</a></span><span class="operator">::</span>MouseButtonPress<span class="operator">,</span>
|
|
data<span class="operator">-</span><span class="operator">></span>pressPos<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>LeftButton<span class="operator">,</span>
|
|
<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>LeftButton<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>NoModifier);
|
|
<span class="type"><a href="qmouseevent.html">QMouseEvent</a></span> <span class="operator">*</span>event2 <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qmouseevent.html">QMouseEvent</a></span>(<span class="type"><a href="qevent.html">QEvent</a></span><span class="operator">::</span>MouseButtonRelease<span class="operator">,</span>
|
|
data<span class="operator">-</span><span class="operator">></span>pressPos<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>LeftButton<span class="operator">,</span>
|
|
<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>LeftButton<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>NoModifier);
|
|
|
|
data<span class="operator">-</span><span class="operator">></span>ignored <span class="operator"><</span><span class="operator"><</span> event1;
|
|
data<span class="operator">-</span><span class="operator">></span>ignored <span class="operator"><</span><span class="operator"><</span> event2;
|
|
<span class="type"><a href="qapplication.html">QApplication</a></span><span class="operator">::</span>postEvent(object<span class="operator">,</span> event1);
|
|
<span class="type"><a href="qapplication.html">QApplication</a></span><span class="operator">::</span>postEvent(object<span class="operator">,</span> event2);
|
|
} <span class="keyword">else</span> <span class="keyword">if</span> (type <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qevent.html">QEvent</a></span><span class="operator">::</span>MouseMove) {
|
|
consumed <span class="operator">=</span> <span class="keyword">true</span>;
|
|
data<span class="operator">-</span><span class="operator">></span>scrollTo(mousePos);
|
|
|
|
<span class="keyword">const</span> <span class="type"><a href="qpoint.html">QPoint</a></span> delta <span class="operator">=</span> mousePos <span class="operator">-</span> data<span class="operator">-</span><span class="operator">></span>pressPos;
|
|
<span class="keyword">if</span> (delta<span class="operator">.</span>x() <span class="operator">></span> fingerAccuracyThreshold <span class="operator">|</span><span class="operator">|</span> delta<span class="operator">.</span>y() <span class="operator">></span> fingerAccuracyThreshold)
|
|
data<span class="operator">-</span><span class="operator">></span>state <span class="operator">=</span> FlickData<span class="operator">::</span>ManualScroll;
|
|
}
|
|
<span class="keyword">break</span>;
|
|
|
|
<span class="keyword">case</span> FlickData<span class="operator">::</span>ManualScroll:
|
|
<span class="keyword">if</span> (type <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qevent.html">QEvent</a></span><span class="operator">::</span>MouseMove) {
|
|
consumed <span class="operator">=</span> <span class="keyword">true</span>;
|
|
data<span class="operator">-</span><span class="operator">></span>scrollTo(mousePos);
|
|
} <span class="keyword">else</span> <span class="keyword">if</span> (type <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qevent.html">QEvent</a></span><span class="operator">::</span>MouseButtonRelease) {
|
|
consumed <span class="operator">=</span> <span class="keyword">true</span>;
|
|
data<span class="operator">-</span><span class="operator">></span>state <span class="operator">=</span> FlickData<span class="operator">::</span>AutoScroll;
|
|
data<span class="operator">-</span><span class="operator">></span>lastPosValid <span class="operator">=</span> <span class="keyword">false</span>;
|
|
d<span class="operator">-</span><span class="operator">></span>startTicker(<span class="keyword">this</span>);
|
|
}
|
|
<span class="keyword">break</span>;
|
|
|
|
<span class="keyword">case</span> FlickData<span class="operator">::</span>AutoScroll:
|
|
<span class="keyword">if</span> (type <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qevent.html">QEvent</a></span><span class="operator">::</span>MouseButtonPress) {
|
|
consumed <span class="operator">=</span> <span class="keyword">true</span>;
|
|
data<span class="operator">-</span><span class="operator">></span>state <span class="operator">=</span> FlickData<span class="operator">::</span>AutoScrollAcceleration;
|
|
data<span class="operator">-</span><span class="operator">></span>waitingAcceleration <span class="operator">=</span> <span class="keyword">true</span>;
|
|
data<span class="operator">-</span><span class="operator">></span>accelerationTimer<span class="operator">.</span>start();
|
|
data<span class="operator">-</span><span class="operator">></span>updateSpeed(mousePos);
|
|
data<span class="operator">-</span><span class="operator">></span>pressPos <span class="operator">=</span> mousePos;
|
|
} <span class="keyword">else</span> <span class="keyword">if</span> (type <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qevent.html">QEvent</a></span><span class="operator">::</span>MouseButtonRelease) {
|
|
consumed <span class="operator">=</span> <span class="keyword">true</span>;
|
|
data<span class="operator">-</span><span class="operator">></span>state <span class="operator">=</span> FlickData<span class="operator">::</span>Steady;
|
|
data<span class="operator">-</span><span class="operator">></span>resetSpeed();
|
|
}
|
|
<span class="keyword">break</span>;
|
|
|
|
<span class="keyword">case</span> FlickData<span class="operator">::</span>AutoScrollAcceleration:
|
|
<span class="keyword">if</span> (type <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qevent.html">QEvent</a></span><span class="operator">::</span>MouseMove) {
|
|
consumed <span class="operator">=</span> <span class="keyword">true</span>;
|
|
data<span class="operator">-</span><span class="operator">></span>updateSpeed(mousePos);
|
|
data<span class="operator">-</span><span class="operator">></span>accelerationTimer<span class="operator">.</span>start();
|
|
<span class="keyword">if</span> (data<span class="operator">-</span><span class="operator">></span>speed<span class="operator">.</span>isNull())
|
|
data<span class="operator">-</span><span class="operator">></span>state <span class="operator">=</span> FlickData<span class="operator">::</span>ManualScroll;
|
|
} <span class="keyword">else</span> <span class="keyword">if</span> (type <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qevent.html">QEvent</a></span><span class="operator">::</span>MouseButtonRelease) {
|
|
consumed <span class="operator">=</span> <span class="keyword">true</span>;
|
|
data<span class="operator">-</span><span class="operator">></span>state <span class="operator">=</span> FlickData<span class="operator">::</span>AutoScroll;
|
|
data<span class="operator">-</span><span class="operator">></span>waitingAcceleration <span class="operator">=</span> <span class="keyword">false</span>;
|
|
data<span class="operator">-</span><span class="operator">></span>lastPosValid <span class="operator">=</span> <span class="keyword">false</span>;
|
|
}
|
|
<span class="keyword">break</span>;
|
|
<span class="keyword">default</span>:
|
|
<span class="keyword">break</span>;
|
|
}
|
|
data<span class="operator">-</span><span class="operator">></span>lastPos <span class="operator">=</span> mousePos;
|
|
<span class="keyword">return</span> <span class="keyword">true</span>;
|
|
}
|
|
|
|
<span class="type">void</span> FlickCharm<span class="operator">::</span>timerEvent(<span class="type"><a href="qtimerevent.html">QTimerEvent</a></span> <span class="operator">*</span>event)
|
|
{
|
|
<span class="type">int</span> count <span class="operator">=</span> <span class="number">0</span>;
|
|
<span class="type"><a href="qhashiterator.html">QHashIterator</a></span><span class="operator"><</span><span class="type"><a href="qwidget.html">QWidget</a></span><span class="operator">*</span><span class="operator">,</span> FlickData<span class="operator">*</span><span class="operator">></span> item(d<span class="operator">-</span><span class="operator">></span>flickData);
|
|
<span class="keyword">while</span> (item<span class="operator">.</span>hasNext()) {
|
|
item<span class="operator">.</span>next();
|
|
FlickData <span class="operator">*</span>data <span class="operator">=</span> item<span class="operator">.</span>value();
|
|
<span class="keyword">if</span> (data<span class="operator">-</span><span class="operator">></span>state <span class="operator">=</span><span class="operator">=</span> FlickData<span class="operator">::</span>AutoScrollAcceleration
|
|
<span class="operator">&</span><span class="operator">&</span> data<span class="operator">-</span><span class="operator">></span>waitingAcceleration
|
|
<span class="operator">&</span><span class="operator">&</span> data<span class="operator">-</span><span class="operator">></span>accelerationTimer<span class="operator">.</span>elapsed() <span class="operator">></span> <span class="number">40</span>) {
|
|
data<span class="operator">-</span><span class="operator">></span>state <span class="operator">=</span> FlickData<span class="operator">::</span>ManualScroll;
|
|
data<span class="operator">-</span><span class="operator">></span>resetSpeed();
|
|
}
|
|
<span class="keyword">if</span> (data<span class="operator">-</span><span class="operator">></span>state <span class="operator">=</span><span class="operator">=</span> FlickData<span class="operator">::</span>AutoScroll <span class="operator">|</span><span class="operator">|</span> data<span class="operator">-</span><span class="operator">></span>state <span class="operator">=</span><span class="operator">=</span> FlickData<span class="operator">::</span>AutoScrollAcceleration) {
|
|
<span class="keyword">const</span> <span class="type">int</span> timeElapsed <span class="operator">=</span> d<span class="operator">-</span><span class="operator">></span>timeCounter<span class="operator">.</span>elapsed();
|
|
<span class="keyword">const</span> <span class="type"><a href="qpoint.html">QPoint</a></span> delta <span class="operator">=</span> (data<span class="operator">-</span><span class="operator">></span>speed) <span class="operator">*</span> timeElapsed <span class="operator">/</span> <span class="number">1000</span>;
|
|
<span class="type">bool</span> hasScrolled <span class="operator">=</span> data<span class="operator">-</span><span class="operator">></span>scrollWidget(delta<span class="operator">.</span>x()<span class="operator">,</span> delta<span class="operator">.</span>y());
|
|
|
|
<span class="keyword">if</span> (data<span class="operator">-</span><span class="operator">></span>speed<span class="operator">.</span>isNull() <span class="operator">|</span><span class="operator">|</span> <span class="operator">!</span>hasScrolled)
|
|
data<span class="operator">-</span><span class="operator">></span>state <span class="operator">=</span> FlickData<span class="operator">::</span>Steady;
|
|
<span class="keyword">else</span>
|
|
count<span class="operator">+</span><span class="operator">+</span>;
|
|
data<span class="operator">-</span><span class="operator">></span>speed <span class="operator">=</span> deaccelerate(data<span class="operator">-</span><span class="operator">></span>speed<span class="operator">,</span> timeElapsed);
|
|
}
|
|
}
|
|
|
|
<span class="keyword">if</span> (<span class="operator">!</span>count)
|
|
d<span class="operator">-</span><span class="operator">></span>ticker<span class="operator">.</span>stop();
|
|
<span class="keyword">else</span>
|
|
d<span class="operator">-</span><span class="operator">></span>timeCounter<span class="operator">.</span>start();
|
|
|
|
<span class="type"><a href="qobject.html">QObject</a></span><span class="operator">::</span>timerEvent(event);
|
|
}</pre>
|
|
</div>
|
|
<!-- @@@demos/embedded/anomaly/src/flickcharm.cpp -->
|
|
</div>
|
|
</div>
|
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</div>
|
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<div class="ft">
|
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<span></span>
|
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</div>
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</div>
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<div class="footer">
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<p>
|
|
<acronym title="Copyright">©</acronym> 2015 The Qt Company Ltd.
|
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Documentation contributions included herein are the copyrights of
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their respective owners.</p>
|
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<br />
|
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<p>
|
|
The documentation provided herein is licensed under the terms of the
|
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<a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation
|
|
License version 1.3</a> as published by the Free Software Foundation.</p>
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<p>
|
|
Documentation sources may be obtained from <a href="http://www.qt-project.org">
|
|
www.qt-project.org</a>.</p>
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<br />
|
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<p>
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Qt and respective logos are trademarks of The Qt Company Ltd
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in Finland and/or other countries worldwide. All other trademarks are property
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of their respective owners. <a title="Privacy Policy"
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href="http://en.gitorious.org/privacy_policy/">Privacy Policy</a></p>
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