author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 31 Aug 2010 15:13:43 +0300 | |
branch | RCL_3 |
changeset 65 | 12af337248b1 |
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: CalenDayContentScrollArea implementation. |
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* |
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*/ |
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// System includes |
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#include <QGraphicsLinearLayout> |
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#include <QGesture> |
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#include <HbInstance> |
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#include <HbSwipeGesture> |
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// User includes |
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#include "calendaycontentscrollarea.h" |
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#include "calendayutils.h" |
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// Constants |
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/*! |
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Default timeout for scrolling between days [ms] |
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*/ |
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const int KCalenScrollDaysTimeout = 600; |
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/*! |
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Value [%] defines how long (depending on content area width) should horizontal |
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pan gesture be to change day to previous/next. |
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If the gesture is shorter - current view is not changed. |
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*/ |
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const int KCalenHScrollMoveParam = 30; //!< Percentage |
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/*! |
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Value [degree] defines the max. angle of swipe gesture which should change day. |
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*/ |
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const qreal KCalenSwipeAngle = 30; |
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/*! |
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\class CalenDayContentScrollArea |
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\brief Scrollable container class for content widgets. |
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It handles horizontal scrolling and swipe or pan gestures. |
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*/ |
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/*! |
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\brief Constructor |
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Configures scroll area settings and resets internal stares of widget. |
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Gets the width of device. |
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\param parent The parent of scroll area widget |
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*/ |
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CalenDayContentScrollArea::CalenDayContentScrollArea(QGraphicsItem *parent) : |
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HbScrollArea(parent), mPanDayDirection(ECalenPanNotSet), mIsMoving(false), |
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mMoveDirection(ECalenScrollNoDayChange) |
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{ |
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#ifdef CALENDAYVIEW_PANNING_ENABLED |
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grabGesture(Qt::PanGesture); |
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ungrabGesture(Qt::SwipeGesture); |
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#else |
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grabGesture(Qt::SwipeGesture); |
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ungrabGesture(Qt::PanGesture); |
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#endif |
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// Get the width of content area and orientation of screen |
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mContentWidth = CalenDayUtils::instance()->contentWidth(); |
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mOrientation = CalenDayUtils::instance()->orientation(); |
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// Fix the width of scroll area |
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setMinimumWidth(mContentWidth); |
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setMaximumWidth(mContentWidth); |
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// Connect to main window's orientationChanged SIGNAL to handle orientation |
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// switching |
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connect(CalenDayUtils::instance()->mainWindow(), |
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SIGNAL(orientationChanged(Qt::Orientation)), this, |
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SLOT(orientationChanged(Qt::Orientation))); |
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} |
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/*! |
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\brief Destructor |
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*/ |
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CalenDayContentScrollArea::~CalenDayContentScrollArea() |
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{ |
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} |
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/*! |
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\brief Scrolls to middle widget. |
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Scrolling to middle widget is done if needed. |
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Resets internal pan direction flag. |
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*/ |
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void CalenDayContentScrollArea::scrollToMiddleWidget() |
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{ |
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QPointF currentPosition = contentWidget()->pos(); |
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QPointF destPosition = QPointF(mContentWidth, currentPosition.y()); |
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108 |
// Scroll only when x position is wrong |
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if (currentPosition.x() != destPosition.x()) { |
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scrollContentsTo(QPointF(mContentWidth, currentPosition.y()), 0); |
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111 |
} |
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112 |
|
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113 |
// Reset pan direction flag and scrolling flag |
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mPanDayDirection = ECalenPanNotSet; |
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115 |
} |
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116 |
|
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117 |
/*! |
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\brief Scrolls the view by the amount indicated by "delta". |
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119 |
|
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120 |
Checks the direction of pan gesture and promotes leading direction. |
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121 |
|
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\param delta Move offset |
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\return Returns TRUE if the view was able to scroll, FALSE otherwise |
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*/ |
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bool CalenDayContentScrollArea::scrollByAmount(const QPointF &delta) |
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126 |
{ |
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QPointF newDelta(delta); |
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if (mPanDayDirection == ECalenPanVertical) { |
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newDelta.setX(0); |
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} |
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131 |
else |
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if (mPanDayDirection == ECalenPanHorizontal) { |
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newDelta.setY(0); |
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134 |
} |
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135 |
else { |
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// Pan direction not set |
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137 |
} |
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138 |
|
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return HbScrollArea::scrollByAmount(newDelta); |
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140 |
} |
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|
141 |
|
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142 |
/*! |
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143 |
\brief Handles pan gesture event (horizontal) or swipe gesture. |
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144 |
|
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145 |
Ignores vertical pan gestures. |
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146 |
|
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\param event Gesture event to be handled |
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148 |
*/ |
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void CalenDayContentScrollArea::gestureEvent(QGestureEvent *event) |
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150 |
{ |
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151 |
#ifdef CALENDAYVIEW_PANNING_ENABLED |
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// Process a pan gesture event |
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if (QPanGesture *panGesture = qobject_cast<QPanGesture*> (event->gesture( |
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Qt::PanGesture))) { |
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155 |
|
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156 |
// Checks pan gesture direction |
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checkPanDirection(panGesture); |
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158 |
|
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// Put the gesture forward before working with finished gesture |
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HbScrollArea::gestureEvent(event); |
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161 |
|
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162 |
// If gesture is finished move the scroll area to next or previous |
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163 |
// widget or resume to gesture start point |
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if (panGesture->state() == Qt::GestureFinished) { |
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165 |
// Pan direction should be reseted when scrolling ends |
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|
166 |
|
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167 |
// Gets the offset of pan gesture. |
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QPointF offset = panGesture->offset(); |
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169 |
|
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170 |
// Note: in horizontal orientation x should is treaten as Y, y as X. |
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171 |
QPointF movement; |
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172 |
if (mOrientation == Qt::Vertical) { |
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movement = offset; |
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|
174 |
} |
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|
175 |
else { |
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176 |
movement.setX(offset.y()); |
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177 |
movement.setY(offset.x()); |
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178 |
} |
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|
179 |
|
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180 |
// Gesture was long enough for place movement |
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|
181 |
if (qAbs(movement.x()) > (KCalenHScrollMoveParam * mContentWidth / 100)) { |
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182 |
if (movement.x() < 0) { |
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|
183 |
mMoveDirection = ECalenScrollToNext; |
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|
184 |
moveTo(QPointF((-mStartPosition.x() + mContentWidth), |
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|
185 |
-mStartPosition.y()), KCalenScrollDaysTimeout); |
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|
186 |
} |
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|
187 |
else { |
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188 |
mMoveDirection = ECalenScrollToPrev; |
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|
189 |
moveTo(QPointF(-mStartPosition.x() - mContentWidth, |
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190 |
-mStartPosition.y()), KCalenScrollDaysTimeout); |
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|
191 |
} |
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|
192 |
} |
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193 |
// Gesture was short one, reset to gesture start point |
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|
194 |
else { |
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195 |
qreal startPos = mStartPosition.x(); |
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196 |
bool isNegative = false; |
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197 |
if (startPos < 0) { |
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198 |
isNegative = true; |
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199 |
} |
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200 |
startPos = qAbs(startPos); |
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|
201 |
qreal normalizeValue = mContentWidth / 2; |
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|
202 |
|
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203 |
while (startPos > normalizeValue) { |
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204 |
normalizeValue += mContentWidth; |
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205 |
} |
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206 |
|
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207 |
if (isNegative) { |
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mStartPosition.setX(-(normalizeValue - (mContentWidth / 2))); |
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209 |
} |
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210 |
else { |
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211 |
mStartPosition.setX(normalizeValue - (mContentWidth / 2)); |
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212 |
} |
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|
213 |
|
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214 |
mMoveDirection = ECalenScrollNoDayChange; |
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moveTo(-mStartPosition, KCalenScrollDaysTimeout); |
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} |
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} |
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} |
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219 |
else { |
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HbScrollArea::gestureEvent(event); |
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} |
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#else |
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// Let the content scroll area ignore pan gestures |
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if (QPanGesture *panGesture = qobject_cast<QPanGesture *> (event->gesture( |
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Qt::PanGesture))) { |
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// do nothing with pan gesture |
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} |
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228 |
|
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if (HbSwipeGesture *swipeGesture = |
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qobject_cast<HbSwipeGesture *> (event->gesture(Qt::SwipeGesture))) { |
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if (swipeGesture->state() == Qt::GestureStarted) { |
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mStartPosition = contentWidget()->pos(); |
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233 |
|
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qreal swipeAngle = swipeGesture->sceneSwipeAngle(); |
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if (isHorizontalSwipe(swipeAngle)) { |
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if (QSwipeGesture::Left == |
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swipeGesture->sceneHorizontalDirection()) { |
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mMoveDirection = ECalenScrollToNext; |
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moveTo(QPointF((-mStartPosition.x() + mContentWidth), |
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-mStartPosition.y()), KCalenScrollDaysTimeout); |
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} |
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else if (QSwipeGesture::Right == |
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swipeGesture->sceneHorizontalDirection()) { |
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mMoveDirection = ECalenScrollToPrev; |
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moveTo(QPointF(-mStartPosition.x() - mContentWidth, |
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-mStartPosition.y()), KCalenScrollDaysTimeout); |
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} |
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} |
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} |
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} |
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#endif |
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} |
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253 |
|
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254 |
/*! |
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\brief Filters pan gesture events. |
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256 |
|
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Filters events if this object has been installed as an event filter for |
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the watched object. Handles horizontal pan gestures (ignores vertical). |
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When moving scroll area all gesture events are blocked. |
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260 |
|
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\param obj Watched object |
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\param event Event to be filtered |
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\return Returns TRUE if event was handled. FALSE otherwise. |
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*/ |
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bool CalenDayContentScrollArea::eventFilter(QObject *obj, QEvent *event) |
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{ |
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Q_UNUSED(obj); |
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268 |
|
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bool handled = false; |
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270 |
|
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// Check if we get a gesture event |
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if (event->type() == QEvent::Gesture) { |
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273 |
|
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// Blocks handling of gesture events if scrolling started by |
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// pan gesture is in progress |
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if (mIsMoving) { |
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handled = true; |
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} |
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else { |
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QGestureEvent* gesture = static_cast<QGestureEvent*> (event); |
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281 |
|
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// Check if we get a pan gesture |
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QPanGesture *panGesture = qobject_cast<QPanGesture*> ( |
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gesture->gesture(Qt::PanGesture)); |
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if (panGesture) { |
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checkPanDirection(panGesture); |
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if (mPanDayDirection == ECalenPanHorizontal) { |
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gestureEvent(gesture); |
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handled = true; |
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} |
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291 |
} |
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292 |
} |
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293 |
} |
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294 |
|
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return handled; |
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} |
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297 |
|
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298 |
/*! |
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\brief Overriden event handler. |
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300 |
|
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Handles events: |
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- gesture/focus events blocked when horizontal scrolling is in progress |
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- layout request event - scrolls to middle widget if current position is wrong |
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304 |
|
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\param e Event to be handled |
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\return Returns TRUE if event was handled. FALSE otherwise. |
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*/ |
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bool CalenDayContentScrollArea::event(QEvent *e) |
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309 |
{ |
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bool result = false; |
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311 |
|
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// Blocks base class handler for certain events if scrolling started |
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// by pan gesture is in progress |
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if (mIsMoving && (e->type() == QEvent::Gesture || e->type() |
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== QEvent::GestureOverride || e->type() == QEvent::FocusOut |
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|| e->type() == QEvent::FocusIn)) { |
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result = true; |
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} |
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if (!result) { |
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// Call base class handler |
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result = HbScrollArea::event(e); |
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322 |
|
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// Scroll to middle widget when layout request |
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if (e->type() == QEvent::LayoutRequest || e->type() == QEvent::Show) { |
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scrollToMiddleWidget(); |
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} |
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327 |
} |
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|
328 |
|
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return result; |
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330 |
} |
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|
331 |
|
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332 |
/*! |
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333 |
\brief Checks the direction of pan gesture. |
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|
334 |
|
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|
335 |
Changes the scrolling style according to movement direction, |
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336 |
stores the orientation of the pan gesture. |
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Function is used when switching widgets by panning gesture is enabled. |
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|
338 |
|
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|
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\param panGesture Pan gesture event |
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*/ |
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|
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void CalenDayContentScrollArea::checkPanDirection(QPanGesture *panGesture) |
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342 |
{ |
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// Gets the offset of pan gesture. |
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QPointF offset = panGesture->offset(); |
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|
345 |
|
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// Note: in horizontal orientation x should is treaten as Y, y as X. |
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QPointF movement; |
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if (mOrientation == Qt::Vertical) { |
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movement = offset; |
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} |
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351 |
else { |
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movement.setX(offset.y()); |
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movement.setY(offset.x()); |
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|
354 |
} |
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|
355 |
|
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Revision: 201033
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356 |
// If gesture is started check leading movement direction |
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|
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if (panGesture->state() == Qt::GestureStarted) { |
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|
358 |
if (qAbs(movement.x()) < qAbs(movement.y())) { |
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Revision: 201033
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|
359 |
mPanDayDirection = ECalenPanVertical; |
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|
360 |
} |
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|
361 |
else { |
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|
362 |
mStartPosition = contentWidget()->pos(); |
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Revision: 201033
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|
363 |
mPanDayDirection = ECalenPanHorizontal; |
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|
364 |
} |
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|
365 |
} |
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diff
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|
366 |
} |
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|
367 |
|
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|
368 |
/*! |
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|
369 |
\brief Scrolls the contents to the newPosition in a given time. |
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|
370 |
|
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Revision: 201033
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|
371 |
Sets the flag to indicate that scrolling is in progress. Use this function |
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Revision: 201033
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|
372 |
for scrolling with timeout > 0 to block gesture and focus events during |
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Revision: 201033
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373 |
scroll area movement. |
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|
374 |
|
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\param newPosition Destination position |
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\param time Time of scroll movement |
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|
377 |
*/ |
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Revision: 201033
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|
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void CalenDayContentScrollArea::moveTo(const QPointF &newPosition, int time) |
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|
379 |
{ |
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Revision: 201033
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|
380 |
// Connect to scrollingEnded SIGNAL to get feedback when scrolling ends |
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Revision: 201033
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|
381 |
connect(this, SIGNAL(scrollingEnded()), this, SLOT(moveFinished())); |
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|
382 |
|
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Revision: 201033
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|
383 |
// Scroll the content to new position and set isMoving flag |
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Revision: 201033
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|
384 |
scrollContentsTo(newPosition, time); |
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Revision: 201033
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|
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mIsMoving = true; |
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Revision: 201033
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|
386 |
|
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Revision: 201033
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|
387 |
// Emit signal that moving has just started |
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Revision: 201033
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|
388 |
if (mMoveDirection != ECalenScrollNoDayChange) { |
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Revision: 201033
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|
389 |
emit scrollAreaMoveStarted(mMoveDirection); |
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Revision: 201033
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diff
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|
390 |
} |
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Revision: 201033
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|
391 |
} |
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Revision: 201033
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diff
changeset
|
392 |
|
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Revision: 201033
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diff
changeset
|
393 |
/*! |
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Revision: 201033
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|
394 |
\brief isHorizontalSwipe |
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diff
changeset
|
395 |
|
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Revision: 201033
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|
396 |
\return TRUE if horizontal swipe was recognized (angle in specific range) |
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Revision: 201033
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|
397 |
*/ |
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Revision: 201033
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parents:
diff
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|
398 |
bool CalenDayContentScrollArea::isHorizontalSwipe(qreal angle) const |
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diff
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|
399 |
{ |
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Revision: 201033
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parents:
diff
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|
400 |
bool isHSwipe = false; |
12af337248b1
Revision: 201033
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parents:
diff
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|
401 |
if ((angle < KCalenSwipeAngle) || |
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Revision: 201033
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diff
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|
402 |
((angle > 180 - KCalenSwipeAngle) && (angle < 180 + KCalenSwipeAngle)) || |
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Revision: 201033
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diff
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|
403 |
(angle > 360 - KCalenSwipeAngle)) { |
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Revision: 201033
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diff
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|
404 |
isHSwipe = true; |
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Revision: 201033
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parents:
diff
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|
405 |
} |
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Revision: 201033
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diff
changeset
|
406 |
|
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Revision: 201033
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|
407 |
return isHSwipe; |
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Revision: 201033
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diff
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|
408 |
} |
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Revision: 201033
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parents:
diff
changeset
|
409 |
|
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Revision: 201033
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parents:
diff
changeset
|
410 |
/*! |
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Revision: 201033
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diff
changeset
|
411 |
\brief Slot which is called when moving of scroll area is finished. |
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Revision: 201033
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parents:
diff
changeset
|
412 |
|
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Revision: 201033
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diff
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|
413 |
Resets internal isMoving flag. |
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Revision: 201033
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diff
changeset
|
414 |
*/ |
12af337248b1
Revision: 201033
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parents:
diff
changeset
|
415 |
void CalenDayContentScrollArea::moveFinished() |
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Revision: 201033
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parents:
diff
changeset
|
416 |
{ |
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Revision: 201033
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parents:
diff
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|
417 |
// Disconnect from signal, move is finished now |
12af337248b1
Revision: 201033
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parents:
diff
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|
418 |
disconnect(this, SIGNAL(scrollingEnded()), this, SLOT(moveFinished())); |
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Revision: 201033
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parents:
diff
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|
419 |
mIsMoving = false; |
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Revision: 201033
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parents:
diff
changeset
|
420 |
|
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Revision: 201033
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parents:
diff
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|
421 |
// Emit signal that moving has just finished and reset direction |
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Revision: 201033
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parents:
diff
changeset
|
422 |
if (mMoveDirection != ECalenScrollNoDayChange) { |
12af337248b1
Revision: 201033
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parents:
diff
changeset
|
423 |
emit scrollAreaMoveFinished(mMoveDirection); |
12af337248b1
Revision: 201033
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parents:
diff
changeset
|
424 |
mMoveDirection = ECalenScrollNoDayChange; |
12af337248b1
Revision: 201033
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parents:
diff
changeset
|
425 |
} |
12af337248b1
Revision: 201033
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parents:
diff
changeset
|
426 |
} |
12af337248b1
Revision: 201033
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parents:
diff
changeset
|
427 |
|
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Revision: 201033
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parents:
diff
changeset
|
428 |
/*! |
12af337248b1
Revision: 201033
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parents:
diff
changeset
|
429 |
\brief Slot which is called whenever the orientation of the device changes. |
12af337248b1
Revision: 201033
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parents:
diff
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Stores screen width and orientation in private members. |
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\param orientation Current device orientation |
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*/ |
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void CalenDayContentScrollArea::orientationChanged(Qt::Orientation orientation) |
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{ |
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// Update the width of content area |
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mContentWidth = CalenDayUtils::instance()->contentWidth(); |
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mOrientation = orientation; |
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// Fix the width of scroll area |
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setMinimumWidth(mContentWidth); |
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setMaximumWidth(mContentWidth); |
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scrollToMiddleWidget(); |
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// Reset flag related to moving |
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mPanDayDirection = ECalenPanNotSet; |
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mMoveDirection = ECalenScrollNoDayChange; |
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mIsMoving = false; |
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} |
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// End of File |