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/*
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* Copyright (c) 2009 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:
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*
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*/
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#include <QVector2D>
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#include "hswidgetpositioningonwidgetmove.h"
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#include "hsapp_defs.h"
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/*!
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The distance by which the line is extended on each side of reference points
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*/
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#define SNAP_LINE_EXTEND_VALUE 10.0
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/*!
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Sets the snap method instance. The existing instance
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will be deleted.
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*/
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void HsWidgetPositioningOnWidgetMove::setInstance(HsWidgetPositioningOnWidgetMove *instance)
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{
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if (mInstance)
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delete mInstance;
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mInstance = instance;
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}
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/*!
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Returns the snap method instance.
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*/
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HsWidgetPositioningOnWidgetMove *HsWidgetPositioningOnWidgetMove::instance()
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{
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return mInstance;
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}
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/*!
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Points to the snap method instance.
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*/
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HsWidgetPositioningOnWidgetMove *HsWidgetPositioningOnWidgetMove::mInstance = 0;
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/*!
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Constructor.
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*/
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HsSnapToLines::HsSnapToLines() :
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mActiveRectWidth(0.0), mActiveRectHeight(0.0),
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mHorizontalSnapPosition(0.0), mVerticalSnapPosition(0.0),
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mHorizontalSnapFound(false),
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mVerticalSnapFound(false),
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mRectLieAbove(false), mLeftInRange(false), mRightInRange(false),
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mMinVerticalEdgesDistance(0.0), mVerticalDistance(0.0),
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mVerticalDistanceFromSelectedRect(0.0), mContainerVerticalEdgeDistance(0.0),
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mRectLieLeft(false), mTopInRange(false), mBottomInRange(false),
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mMinHorizontalEdgesDistance(0.0), mHorizontalDistance(0.0),
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mHorizontalDistanceFromSelectedRect(0.0), mContainerHorizontalEdgeDistance(0.0),
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mSnapEnabled(false), mSnapForce(0.0), mSnapGap(0.0),
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mRectVerticalEdgeLiesInLineWithVerticalLine(false), mRectLieAboveVerticalLine(false), mRectLieBelowVerticalLine(false),
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mRectHorizontalEdgeLiesInLineWithHorizontalLine(false), mRectLieLeftOfHorizontalLine(false), mRectLiesRightOfHorizontalLine(false)
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{
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}
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/*!
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Configures the snap-to-lines algorithm.
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*/
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void HsSnapToLines::setConfiguration(const QVariantHash &configuration)
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{
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bool canConvert = false;
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mSnapEnabled = configuration[SNAPENABLED].toBool();
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//The following values should be in qreal, so the status received in canConvert is ignored
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mSnapForce = configuration[SNAPFORCE].toDouble(&canConvert);
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mSnapGap = configuration[SNAPGAP].toDouble(&canConvert);
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}
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/*!
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Set the dimensions of container rect, active rect and position of Inactive Rects
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on the page.
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*/
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void HsSnapToLines::setPagePresentation(const QRectF &containerRect,
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const QList<QRectF> &inactiveRects,
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const QRectF &activeRect)
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{
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mContainerRect = containerRect;
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mActiveRectWidth = activeRect.width();
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mActiveRectHeight = activeRect.height();
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createSnappableRectangles(inactiveRects);
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}
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/*!
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Create the list of rects and flag if their sides are snappable from top or bottom or left or right,
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depending on other rects overlapping with the rect.
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*/
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void HsSnapToLines::createSnappableRectangles(const QList<QRectF> &inactiveRects)
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{
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mInactiveSnapRects.clear();
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int i;
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for (i = 0; i<inactiveRects.count(); ++i) {
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QRectF rect = inactiveRects[i];
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HsSnapRectangle snapRectangle(rect);
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int j;
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for (j = 0; j<inactiveRects.count(); ++j) {
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QRectF rectToCompare = inactiveRects[j];
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if (rect != rectToCompare) {
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//Check if the rectangles being compared intersect each other
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if (rectToCompare.intersects(rect)) {
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//As the widgets intersect, check which corner is contained,
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//The corner that is contained is not snappable, when the moving widget is in the same position
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if (rectToCompare.contains(rect.topLeft())) {
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snapRectangle.isLeftSnapableForAbove = false;
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snapRectangle.isTopSnapableForLeft = false;
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}
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if (rectToCompare.contains(rect.topRight())) {
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snapRectangle.isRightSnapableForAbove = false;
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snapRectangle.isTopSnapableForRight = false;
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}
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if (rectToCompare.contains(rect.bottomRight())) {
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snapRectangle.isRightSnapableForBelow = false;
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snapRectangle.isBottomSnapableForRight = false;
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}
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if (rectToCompare.contains(rect.bottomLeft())) {
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snapRectangle.isLeftSnapableForBelow = false;
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snapRectangle.isBottomSnapableForLeft = false;
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}
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}
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}
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}
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if (snapRectangle.isLeftSnapableForAbove || snapRectangle.isLeftSnapableForBelow ||
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snapRectangle.isRightSnapableForAbove || snapRectangle.isRightSnapableForBelow ||
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snapRectangle.isTopSnapableForLeft || snapRectangle.isTopSnapableForRight ||
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snapRectangle.isBottomSnapableForLeft || snapRectangle.isBottomSnapableForRight) {
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mInactiveSnapRects.append(snapRectangle);
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}
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}
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}
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/*!
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Run the snap algorithm to with the position of moving rect, to get a snap result.
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*/
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HsWidgetPositioningOnWidgetMove::Result HsSnapToLines::run(const QRectF &movingRect)
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{
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HsWidgetPositioningOnWidgetMove::Result result;
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if (mSnapEnabled) {
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mMovingRect = movingRect;
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mHorizontalSnapPosition = 0.0;
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mVerticalSnapPosition = 0.0;
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mVerticalLine = QLineF();
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mMinVerticalEdgesDistance = mSnapForce;
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mVerticalDistanceFromSelectedRect = 0.0;
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mContainerVerticalEdgeDistance = 0.0;
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mHorizontalSnapFound = false;
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mHorizontalLine = QLineF();
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mMinHorizontalEdgesDistance = mSnapForce;
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mHorizontalDistanceFromSelectedRect = 0.0;
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mContainerHorizontalEdgeDistance = 0.0;
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mVerticalSnapFound = false;
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checkForCenterSnapping();
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for (int i = 0; i < mInactiveSnapRects.count(); ++i) {
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mInactiveSnapRectToCompare = mInactiveSnapRects[i];
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mInactiveRectToCompare = mInactiveSnapRectToCompare.rectangle;
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if (!movingRect.intersects(mInactiveRectToCompare)) { //Only compare if Inactive Rect and moving rect do not overlap.
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//TODO: Move the above check to another function...
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// X - Direction Snapping
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compareLeftSideOfMovingRectForSnapping();
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compareRightSideOfMovingRectForSnapping();
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// Y - Direction Snapping
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compareTopOfMovingRectForSnapping();
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compareBottomOfMovingRectForSnapping();
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}
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}
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if (mHorizontalSnapFound) {
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result.hasHorizontalSnap = true;
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result.horizontalSnapPosition = mHorizontalSnapPosition;
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extendVerticalLine();
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result.verticalSnapLine = mVerticalLine;
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}
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if (mVerticalSnapFound) {
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result.hasVerticalSnap = true;
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result.verticalSnapPosition = mVerticalSnapPosition;
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extendHorizontalLine();
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result.horizontalSnapLine = mHorizontalLine;
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}
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}
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return result;
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}
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/*!
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Check if the center of moving rect is in the snap force in the middle of continer rect.
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*/
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void HsSnapToLines::checkForCenterSnapping()
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{
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QPointF centerOfContainerRect = mContainerRect.center();
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QRectF verticalSnapField = QRectF(QPointF(centerOfContainerRect.x() - (mSnapForce/2), mContainerRect.top()),
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QPointF(centerOfContainerRect.x() + (mSnapForce/2), mContainerRect.bottom()));
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//Check that the widget lies in the container rect, if the snapping position is proposed... is not required,
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//unless some widget is bigger than the page width
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QPointF centerOfMovingRect = mMovingRect.center();
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if (verticalSnapField.contains(centerOfMovingRect)) {
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mHorizontalSnapFound = true;
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mHorizontalSnapPosition = centerOfContainerRect.x() - mActiveRectWidth/2;
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mMinVerticalEdgesDistance = qAbs(centerOfContainerRect.x() - centerOfMovingRect.x());
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//save the points for the Vertical line
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mVerticalLine.setP1(QPointF(centerOfContainerRect.x(), mMovingRect.top()));
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mVerticalLine.setP2(QPointF(centerOfContainerRect.x(), mMovingRect.bottom()));
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}
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}
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/*!
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Check if the inactive rect being compared with moving rect lies above or below of moving rect.
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*/
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void HsSnapToLines::checkInactiveRectLieAboveOrBelowOfMovingRect()
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{
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//Check if the inactive rect lies below or above of the moving rect
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mRectLieAbove = false;
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mVerticalDistance = 0.0;
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//Inactive Rect lies above or at the save Y position as the Moving Rect
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if (mInactiveRectToCompare.top() <= mMovingRect.top()) {
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mRectLieAbove = true;
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if (mInactiveRectToCompare.bottom() <= mMovingRect.top()) {
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mVerticalDistance = mMovingRect.top() - mInactiveRectToCompare.bottom();
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}
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else {
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mVerticalDistance = mMovingRect.top() - mInactiveRectToCompare.top();
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}
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}
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//Inactive Rect lies below the Moving Rect
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else {
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mRectLieAbove = false;
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if (mMovingRect.bottom() <= mInactiveRectToCompare.top()) {
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mVerticalDistance = mInactiveRectToCompare.top() - mMovingRect.bottom();
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}
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else {
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mVerticalDistance = mInactiveRectToCompare.bottom() - mMovingRect.bottom();
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}
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}
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}
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/*!
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Check if the left edge of moving rect is snappable to the incative rect's left or right edge.
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The inactive rect's edge is only chosen if it is a better fit for horizontal snapping.
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*/
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void HsSnapToLines::compareLeftSideOfMovingRectForSnapping()
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{
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checkInactiveRectLieAboveOrBelowOfMovingRect();
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//calculate the distance of the moving rect's left edge to the inactive rect's left and right edges
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qreal leftToLeftOfInactiveRect = qAbs(mInactiveRectToCompare.left() - mMovingRect.left());
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qreal leftToRightOfInactiveRect = qAbs(mInactiveRectToCompare.right() - mMovingRect.left());
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mLeftInRange = false;
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mRightInRange = false;
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if (leftToLeftOfInactiveRect <= mMinVerticalEdgesDistance) {
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if (mRectLieAbove && mInactiveSnapRectToCompare.isLeftSnapableForBelow
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|| !mRectLieAbove && mInactiveSnapRectToCompare.isLeftSnapableForAbove) {
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mLeftInRange = true;
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}
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}
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if (leftToRightOfInactiveRect <= mMinVerticalEdgesDistance) {
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if (mRectLieAbove && mInactiveSnapRectToCompare.isRightSnapableForBelow
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|| !mRectLieAbove && mInactiveSnapRectToCompare.isRightSnapableForAbove) {
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mRightInRange = true;
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}
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}
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//calculate the distance of inactive rect's left edge and container rect's left edge
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qreal differenceContainerLeftEdgeToInactiveRectLeftEdge = mInactiveRectToCompare.left() - mContainerRect.left();
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//calculate the distance of inactive rect's right edge and container rect's right edge
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qreal differenceContainerRightEdgeToInactiveRectRightEdge = mContainerRect.right() - mInactiveRectToCompare.right();
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qreal minDistancePosition = 0.0;
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qreal distanceVerticalEdges = 0.0;
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qreal xSnapGapAdjustment = 0.0;
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//If only one edge of inactive rect is in snappable range, save that position
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if ((mLeftInRange && !mRightInRange)
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|| !mLeftInRange && mRightInRange) {
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if (mLeftInRange) {
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minDistancePosition = mInactiveRectToCompare.left();
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distanceVerticalEdges = leftToLeftOfInactiveRect;
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xSnapGapAdjustment = 0.0;
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}
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else {
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minDistancePosition = mInactiveRectToCompare.right();
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distanceVerticalEdges = leftToRightOfInactiveRect;
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xSnapGapAdjustment = mSnapGap;
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}
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}
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//else both edges of inactive rect are in range, check which is a better fit
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else if (mLeftInRange && mRightInRange) {
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//if left edge of moving rect to the left of the inactive rect is closer than the left edge of moving rect to the right of the inactive rect
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if (leftToLeftOfInactiveRect < leftToRightOfInactiveRect) {
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minDistancePosition = mInactiveRectToCompare.left();
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distanceVerticalEdges = leftToLeftOfInactiveRect;
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xSnapGapAdjustment = 0.0;
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mRightInRange = false;
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}
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//if the left edge of inactive rect to left of moving rect is at the same distance as the right edge of inactive rect to the right of moving rect
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else if (leftToLeftOfInactiveRect == leftToRightOfInactiveRect) {
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//if inactive rect lies towards the left or middle of container rect, then the left edge is priortized as the selected edge for outside snapping
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if (differenceContainerLeftEdgeToInactiveRectLeftEdge <= differenceContainerRightEdgeToInactiveRectRightEdge) {
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minDistancePosition = mInactiveRectToCompare.left();
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distanceVerticalEdges = leftToLeftOfInactiveRect;
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xSnapGapAdjustment = 0.0;
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mRightInRange = false;
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}
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//else right of the inactive rect lies more close to the right of the container rect, and hence prioritize it for snapping.
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else {
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minDistancePosition = mInactiveRectToCompare.right();
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distanceVerticalEdges = leftToRightOfInactiveRect;
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xSnapGapAdjustment = mSnapGap;
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mLeftInRange = false;
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}
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}
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//else right edge of inactive rect to the left of the moving rect is closer than the left edge of inactive rect to the left of the moving rect
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else{
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minDistancePosition = mInactiveRectToCompare.right();
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distanceVerticalEdges = leftToRightOfInactiveRect;
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xSnapGapAdjustment = mSnapGap;
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mLeftInRange = false;
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}
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}
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//Check if this inactive rect is better fit than the previous selected rect for X - snapping
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bool horizontalSnappingBetterFit = false;
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if (mLeftInRange || mRightInRange) {
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if (distanceVerticalEdges < mMinVerticalEdgesDistance) {
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horizontalSnappingBetterFit = true;
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}
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else if (distanceVerticalEdges == mMinVerticalEdgesDistance) { //the distance in the vertical edges is same as from the selected rectangle
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//check the position of rect with respect to Vertical line
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checkInactiveRectPositionToVerticalLine();
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//if horizontal snap position was previously found the rect's edges are in line with Vertical line
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if (mHorizontalSnapFound && mRectVerticalEdgeLiesInLineWithVerticalLine) {
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if (mRectLieAboveVerticalLine || mRectLieBelowVerticalLine) {
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extendVerticalLineToIncludeInactiveRect();
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}
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}
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//here the case is that moving rect lies exactly in middle of two same sides of two inactive widgets.
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else {
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//Prioritize first on the fact if the inactive rect is closer to the moving rect in Y - direction.
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if (mVerticalDistance < mVerticalDistanceFromSelectedRect) {
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horizontalSnappingBetterFit = true;
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}
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else if (mVerticalDistance == mVerticalDistanceFromSelectedRect) {
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//Prioritize next if this Inactive rect is closer to the left edge of the container rect, then the previously selected rect
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if (differenceContainerLeftEdgeToInactiveRectLeftEdge < mContainerVerticalEdgeDistance) {
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horizontalSnappingBetterFit = true;
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}
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//Prioritize next if the Inactive widget's left edge lies near to left edge of the container rect
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else if (differenceContainerLeftEdgeToInactiveRectLeftEdge < differenceContainerRightEdgeToInactiveRectRightEdge) {
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horizontalSnappingBetterFit = true;
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}
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else {
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|
379 |
//This else will happen if this rectangle being compared is exactly the same as the selected rectangle for snapping.
|
|
380 |
//In that case it does not matter which is the selected rectangle. Hence we leave the already selected rectangle as the better fit.
|
|
381 |
}
|
|
382 |
}
|
|
383 |
}
|
|
384 |
}
|
|
385 |
}
|
|
386 |
|
|
387 |
if (horizontalSnappingBetterFit) {
|
|
388 |
qreal proposedRightOfActiveRect = minDistancePosition + xSnapGapAdjustment + mActiveRectWidth;
|
|
389 |
if (qBound(mContainerRect.left(), proposedRightOfActiveRect, mContainerRect.right())
|
|
390 |
== proposedRightOfActiveRect) {
|
|
391 |
mHorizontalSnapFound = true;
|
|
392 |
mHorizontalSnapPosition = minDistancePosition + xSnapGapAdjustment;
|
|
393 |
mMinVerticalEdgesDistance = distanceVerticalEdges;
|
|
394 |
mVerticalDistanceFromSelectedRect = mVerticalDistance;
|
|
395 |
//Save the new distance of the Chosen Rectangle's left edge from Container's left edge
|
|
396 |
mContainerVerticalEdgeDistance = differenceContainerLeftEdgeToInactiveRectLeftEdge;
|
|
397 |
|
|
398 |
if (mRectLieAbove) {
|
|
399 |
mVerticalLine.setP1(QPointF(minDistancePosition, mInactiveRectToCompare.top()));
|
|
400 |
mVerticalLine.setP2(QPointF(minDistancePosition, mMovingRect.bottom()));
|
|
401 |
}
|
|
402 |
else {
|
|
403 |
mVerticalLine.setP1(QPointF(minDistancePosition, mInactiveRectToCompare.bottom()));
|
|
404 |
mVerticalLine.setP2(QPointF(minDistancePosition, mMovingRect.top()));
|
|
405 |
}
|
|
406 |
}
|
|
407 |
}
|
|
408 |
}
|
|
409 |
|
|
410 |
/*!
|
|
411 |
Check if the right edge of moving rect is snappable to the incative rect's left or right edge.
|
|
412 |
The inactive rect's edge is only chosen if it is a better fit for horizontal snapping.
|
|
413 |
*/
|
|
414 |
void HsSnapToLines::compareRightSideOfMovingRectForSnapping()
|
|
415 |
{
|
|
416 |
checkInactiveRectLieAboveOrBelowOfMovingRect();
|
|
417 |
|
|
418 |
//calculate the distance of the moving rect's right edge to the inactive rect's left and right edges
|
|
419 |
qreal rightToLeftOfInactiveRect = qAbs(mInactiveRectToCompare.left() - mMovingRect.right());
|
|
420 |
qreal rightToRightOfInactiveRect = qAbs(mInactiveRectToCompare.right() - mMovingRect.right());
|
|
421 |
mLeftInRange = false;
|
|
422 |
mRightInRange = false;
|
|
423 |
|
|
424 |
if (rightToLeftOfInactiveRect <= mMinVerticalEdgesDistance) {
|
|
425 |
if (mRectLieAbove && mInactiveSnapRectToCompare.isLeftSnapableForBelow
|
|
426 |
|| !mRectLieAbove && mInactiveSnapRectToCompare.isLeftSnapableForAbove) {
|
|
427 |
mLeftInRange = true;
|
|
428 |
}
|
|
429 |
}
|
|
430 |
if (rightToRightOfInactiveRect <= mMinVerticalEdgesDistance) {
|
|
431 |
if (mRectLieAbove && mInactiveSnapRectToCompare.isRightSnapableForBelow
|
|
432 |
|| !mRectLieAbove && mInactiveSnapRectToCompare.isRightSnapableForAbove) {
|
|
433 |
mRightInRange = true;
|
|
434 |
}
|
|
435 |
}
|
|
436 |
|
|
437 |
//calculate the distance of inactive rect's left edge and container rect's left edge
|
|
438 |
qreal differenceContainerLeftEdgeToInactiveRectLeftEdge = mInactiveRectToCompare.left() - mContainerRect.left();
|
|
439 |
//calculate the distance of inactive rect's right edge and container rect's right edge
|
|
440 |
qreal differenceContainerRightEdgeToInactiveRectRightEdge = mContainerRect.right() - mInactiveRectToCompare.right();
|
|
441 |
qreal minDistancePosition = 0.0;
|
|
442 |
qreal distanceVerticalEdges = 0.0;
|
|
443 |
qreal xSnapGapAdjustment = 0.0;
|
|
444 |
|
|
445 |
//If only one edge of inactive rect is in snappable range, save that position
|
|
446 |
if ((mLeftInRange && !mRightInRange)
|
|
447 |
|| !mLeftInRange && mRightInRange) {
|
|
448 |
if (mLeftInRange) {
|
|
449 |
minDistancePosition = mInactiveRectToCompare.left();
|
|
450 |
distanceVerticalEdges = rightToLeftOfInactiveRect;
|
|
451 |
xSnapGapAdjustment = mSnapGap;
|
|
452 |
}
|
|
453 |
else {
|
|
454 |
minDistancePosition = mInactiveRectToCompare.right();
|
|
455 |
distanceVerticalEdges = rightToRightOfInactiveRect;
|
|
456 |
xSnapGapAdjustment = 0.0;
|
|
457 |
}
|
|
458 |
}
|
|
459 |
//else both edges of inactive rect are in range, check which is a better fit
|
|
460 |
else if (mLeftInRange && mRightInRange) {
|
|
461 |
//if right edge of moving rect to the right of the inactive rect is closer than the right edge of moving rect to the left of inactive rect
|
|
462 |
if (rightToRightOfInactiveRect < rightToLeftOfInactiveRect) {
|
|
463 |
minDistancePosition = mInactiveRectToCompare.right();
|
|
464 |
distanceVerticalEdges = rightToRightOfInactiveRect;
|
|
465 |
xSnapGapAdjustment = 0.0;
|
|
466 |
mLeftInRange = false;
|
|
467 |
}
|
|
468 |
//if the right edge of moving rect to right of inactive rect is at the same distance as the right edge of moving rect to the left of inactive rect
|
|
469 |
else if (rightToRightOfInactiveRect == rightToLeftOfInactiveRect) {
|
|
470 |
//if inactive rect lies towards the right of container rect, then the right edge is priortized as the selected edge for outside snapping
|
|
471 |
if (differenceContainerRightEdgeToInactiveRectRightEdge < differenceContainerLeftEdgeToInactiveRectLeftEdge ) {
|
|
472 |
minDistancePosition = mInactiveRectToCompare.right();
|
|
473 |
distanceVerticalEdges = rightToRightOfInactiveRect;
|
|
474 |
xSnapGapAdjustment = 0.0;
|
|
475 |
mLeftInRange = false;
|
|
476 |
}
|
|
477 |
//else left of the inactive rect lies more close to the left or middle of the container rect, and hence prioritize it
|
|
478 |
else {
|
|
479 |
minDistancePosition = mInactiveRectToCompare.left();
|
|
480 |
distanceVerticalEdges = rightToLeftOfInactiveRect;
|
|
481 |
xSnapGapAdjustment = mSnapGap;
|
|
482 |
mRightInRange = false;
|
|
483 |
}
|
|
484 |
}
|
|
485 |
//else right edge of moving rect to the left of the inactive rect is closer than the right edge of moving rect to the right of the incoming rect
|
|
486 |
else{
|
|
487 |
minDistancePosition = mInactiveRectToCompare.left();
|
|
488 |
distanceVerticalEdges = rightToLeftOfInactiveRect;
|
|
489 |
xSnapGapAdjustment = mSnapGap;
|
|
490 |
mRightInRange = false;
|
|
491 |
}
|
|
492 |
}
|
|
493 |
|
|
494 |
//Check if this inactive rect is better fit than the previous selected rect
|
|
495 |
bool horizontalSnappingBetterFit = false;
|
|
496 |
if (mLeftInRange || mRightInRange) {
|
|
497 |
if (distanceVerticalEdges < mMinVerticalEdgesDistance) {
|
|
498 |
horizontalSnappingBetterFit = true;
|
|
499 |
}
|
|
500 |
else if (distanceVerticalEdges == mMinVerticalEdgesDistance) { //the distance in the vertical edge is same as from the selected rectangle
|
|
501 |
//check the position of rect with respect to Vertical line
|
|
502 |
checkInactiveRectPositionToVerticalLine();
|
|
503 |
//if horizontal snap position was previously found and the rect's edge is in line with Vertical line
|
|
504 |
if (mHorizontalSnapFound && mRectVerticalEdgeLiesInLineWithVerticalLine) {
|
|
505 |
if (mRectLieAboveVerticalLine || mRectLieBelowVerticalLine) {
|
|
506 |
extendVerticalLineToIncludeInactiveRect();
|
|
507 |
}
|
|
508 |
}
|
|
509 |
//here the case is that moving rect lies exactly in middle of two same sides of two inactive widgets.
|
|
510 |
else {
|
|
511 |
//Prioritize first on the fact if the inactive rect is closer to the moving rect in Y - direction.
|
|
512 |
if (mVerticalDistance < mVerticalDistanceFromSelectedRect) {
|
|
513 |
horizontalSnappingBetterFit = true;
|
|
514 |
}
|
|
515 |
else if (mVerticalDistance == mVerticalDistanceFromSelectedRect) {
|
|
516 |
//Prioritize next if this Inactive rect is closer to the right edge of the container rect, then the previously selected rect
|
|
517 |
if (differenceContainerRightEdgeToInactiveRectRightEdge < mContainerVerticalEdgeDistance) {
|
|
518 |
horizontalSnappingBetterFit = true;
|
|
519 |
}
|
|
520 |
//Prioritize next if the Inactive rect's right edge lies near to right edge of the container rect
|
|
521 |
else if (differenceContainerRightEdgeToInactiveRectRightEdge < differenceContainerLeftEdgeToInactiveRectLeftEdge) {
|
|
522 |
horizontalSnappingBetterFit = true;
|
|
523 |
}
|
|
524 |
else {
|
|
525 |
//This else will happen if this rectangle being compared is exactly the same as the selected rectangle for snapping, but in opposite Y direction.
|
|
526 |
//In that case it does not matter which is the selected rectangle. Hece we leave the already selected rectangle as the better fit.
|
|
527 |
}
|
|
528 |
}
|
|
529 |
}
|
|
530 |
}
|
|
531 |
}
|
|
532 |
|
|
533 |
if (horizontalSnappingBetterFit) {
|
|
534 |
qreal proposedLeftOfActiveRect = minDistancePosition - mActiveRectWidth - xSnapGapAdjustment;
|
|
535 |
if (qBound(mContainerRect.left(), proposedLeftOfActiveRect, mContainerRect.right())
|
|
536 |
== proposedLeftOfActiveRect) {
|
|
537 |
mHorizontalSnapFound = true;
|
|
538 |
mHorizontalSnapPosition = proposedLeftOfActiveRect;
|
|
539 |
mMinVerticalEdgesDistance = distanceVerticalEdges;
|
|
540 |
mVerticalDistanceFromSelectedRect = mVerticalDistance;
|
|
541 |
//Save the new distance of the Chosen Rectangle's right edge from Container's right edge
|
|
542 |
mContainerVerticalEdgeDistance = differenceContainerRightEdgeToInactiveRectRightEdge;
|
|
543 |
|
|
544 |
if (mRectLieAbove) {
|
|
545 |
//save the points for the Vertical line
|
|
546 |
mVerticalLine.setP1(QPointF(minDistancePosition, mInactiveRectToCompare.top()));
|
|
547 |
mVerticalLine.setP2(QPointF(minDistancePosition, mMovingRect.bottom()));
|
|
548 |
}
|
|
549 |
else {
|
|
550 |
//save the points for the Vertical line
|
|
551 |
mVerticalLine.setP1(QPointF(minDistancePosition, mInactiveRectToCompare.bottom()));
|
|
552 |
mVerticalLine.setP2(QPointF(minDistancePosition, mMovingRect.top()));
|
|
553 |
}
|
|
554 |
}
|
|
555 |
}
|
|
556 |
}
|
|
557 |
|
|
558 |
/*!
|
|
559 |
Check if the inactive rect being compared with moving rect lies on left or right of moving rect.
|
|
560 |
*/
|
|
561 |
void HsSnapToLines::checkInactiveRectLieLeftOrRightOfMovingRect()
|
|
562 |
{
|
|
563 |
mRectLieLeft = false;
|
|
564 |
mHorizontalDistance = 0.0;
|
|
565 |
//Inactive Rect lies left of the Moving Rect
|
|
566 |
if (mInactiveRectToCompare.left() < mMovingRect.left()) {
|
|
567 |
mRectLieLeft = true;
|
|
568 |
if (mInactiveRectToCompare.right() <= mMovingRect.left()) {
|
|
569 |
mHorizontalDistance = mMovingRect.left() - mInactiveRectToCompare.right();
|
|
570 |
}
|
|
571 |
else {
|
|
572 |
mHorizontalDistance = mMovingRect.left() - mInactiveRectToCompare.left();
|
|
573 |
}
|
|
574 |
}
|
|
575 |
//Inactive Rect lies right of the Moving Rect
|
|
576 |
else {
|
|
577 |
mRectLieLeft = false;
|
|
578 |
if (mMovingRect.right() <= mInactiveRectToCompare.left()) {
|
|
579 |
mHorizontalDistance = mInactiveRectToCompare.left() - mMovingRect.right();
|
|
580 |
}
|
|
581 |
else {
|
|
582 |
mHorizontalDistance = mInactiveRectToCompare.right() - mMovingRect.right();
|
|
583 |
}
|
|
584 |
}
|
|
585 |
}
|
|
586 |
|
|
587 |
/*!
|
|
588 |
Check if the top edge of moving rect is snappable to the incative rect's top or bottom edge.
|
|
589 |
The inactive rect's edge is only chosen if it is a better fit for vertical snapping.
|
|
590 |
*/
|
|
591 |
void HsSnapToLines::compareTopOfMovingRectForSnapping()
|
|
592 |
{
|
|
593 |
//Check if the inactive rect lies to the left or right of the moving rect
|
|
594 |
checkInactiveRectLieLeftOrRightOfMovingRect();
|
|
595 |
|
|
596 |
//calculate the distance of the moving rect's top edge to the inactive rect's top and bottom edges
|
|
597 |
qreal topToTopOfInactiveRect = qAbs(mInactiveRectToCompare.top() - mMovingRect.top());
|
|
598 |
qreal topToBottomOfInactiveRect = qAbs(mInactiveRectToCompare.bottom() - mMovingRect.top());
|
|
599 |
mTopInRange = false;
|
|
600 |
mBottomInRange = false;
|
|
601 |
|
|
602 |
if (topToTopOfInactiveRect <= mMinHorizontalEdgesDistance) {
|
|
603 |
if (mRectLieLeft && mInactiveSnapRectToCompare.isTopSnapableForRight
|
|
604 |
|| !mRectLieLeft && mInactiveSnapRectToCompare.isTopSnapableForLeft) {
|
|
605 |
mTopInRange = true;
|
|
606 |
}
|
|
607 |
}
|
|
608 |
if (topToBottomOfInactiveRect <= mMinHorizontalEdgesDistance) {
|
|
609 |
if (mRectLieLeft && mInactiveSnapRectToCompare.isBottomSnapableForRight
|
|
610 |
|| !mRectLieLeft && mInactiveSnapRectToCompare.isBottomSnapableForLeft) {
|
|
611 |
mBottomInRange = true;
|
|
612 |
}
|
|
613 |
}
|
|
614 |
|
|
615 |
//calculate the distance of inactive rect's top edge and container rect's top edge
|
|
616 |
qreal differenceContainerTopEdgeToInactiveRectTopEdge = mInactiveRectToCompare.top() - mContainerRect.top();
|
|
617 |
//calculate the distance of inactive rect's bottom edge and container rect's bottom edge
|
|
618 |
qreal differenceContainerBottomEdgeToInactiveRectBottomEdge = mContainerRect.bottom() - mInactiveRectToCompare.bottom();
|
|
619 |
qreal minDistancePosition = 0.0;
|
|
620 |
qreal distanceHorizontalEdges = 0.0;
|
|
621 |
qreal ySnapGapAdjustment = 0.0;
|
|
622 |
|
|
623 |
//If only one edge of inactive rect is in snappable range, save that position
|
|
624 |
if ((mTopInRange && !mBottomInRange)
|
|
625 |
|| !mTopInRange && mBottomInRange) {
|
|
626 |
if (mTopInRange) {
|
|
627 |
minDistancePosition = mInactiveRectToCompare.top();
|
|
628 |
distanceHorizontalEdges = topToTopOfInactiveRect;
|
|
629 |
ySnapGapAdjustment = 0.0;
|
|
630 |
}
|
|
631 |
else {
|
|
632 |
minDistancePosition = mInactiveRectToCompare.bottom();
|
|
633 |
distanceHorizontalEdges = topToBottomOfInactiveRect;
|
|
634 |
ySnapGapAdjustment = mSnapGap;
|
|
635 |
}
|
|
636 |
}
|
|
637 |
//else both edges of inactive rect are in range, check which is a better fit
|
|
638 |
else if (mTopInRange && mBottomInRange) {
|
|
639 |
//if top edge of moving rect to the top of the inactive rect is closer than the bottom edge of moving rect to the bottom of the inactive rect
|
|
640 |
if (topToTopOfInactiveRect < topToBottomOfInactiveRect) {
|
|
641 |
minDistancePosition = mInactiveRectToCompare.top();
|
|
642 |
distanceHorizontalEdges = topToTopOfInactiveRect;
|
|
643 |
ySnapGapAdjustment = 0.0;
|
|
644 |
mBottomInRange = false;
|
|
645 |
}
|
|
646 |
//if the top edge of moving rect to top of inactive rect is at the same distance as the top edge of moving rect to the bottom of inactive rect
|
|
647 |
else if (topToTopOfInactiveRect == topToBottomOfInactiveRect) {
|
|
648 |
//if inactive rect lies towards the top or middle of container rect, then the top edge is priortized as the selected edge for outside snapping
|
|
649 |
if (differenceContainerTopEdgeToInactiveRectTopEdge <= differenceContainerBottomEdgeToInactiveRectBottomEdge) {
|
|
650 |
minDistancePosition = mInactiveRectToCompare.top();
|
|
651 |
distanceHorizontalEdges = topToTopOfInactiveRect;
|
|
652 |
ySnapGapAdjustment = 0.0;
|
|
653 |
mBottomInRange = false;
|
|
654 |
}
|
|
655 |
//else bottom of the inactive rect lies more close to the bottom of the container rect, and hence prioritize it for snapping.
|
|
656 |
else {
|
|
657 |
minDistancePosition = mInactiveRectToCompare.bottom();
|
|
658 |
distanceHorizontalEdges = topToBottomOfInactiveRect;
|
|
659 |
ySnapGapAdjustment = mSnapGap;
|
|
660 |
mTopInRange = false;
|
|
661 |
}
|
|
662 |
}
|
|
663 |
//else top edge of moving rect to the bottom of the inactive rect is closer than the top edge of moving rect to the top of the inactive rect
|
|
664 |
else{
|
|
665 |
minDistancePosition = mInactiveRectToCompare.bottom();
|
|
666 |
distanceHorizontalEdges = topToBottomOfInactiveRect;
|
|
667 |
ySnapGapAdjustment = mSnapGap;
|
|
668 |
mTopInRange = false;
|
|
669 |
}
|
|
670 |
}
|
|
671 |
|
|
672 |
//Check if this inactive rect is better fit than the previous selected rect
|
|
673 |
bool verticalSnappingBetterFit = false;
|
|
674 |
if (mTopInRange || mBottomInRange) {
|
|
675 |
if (distanceHorizontalEdges < mMinHorizontalEdgesDistance) {
|
|
676 |
verticalSnappingBetterFit = true;
|
|
677 |
}
|
|
678 |
else if (distanceHorizontalEdges == mMinHorizontalEdgesDistance) { //the distance in the horizontal edge is same as from the selected rectangle
|
|
679 |
//check the position of rect with respect to horizontal line
|
|
680 |
checkInactiveRectPositionToHorizontalLine();
|
|
681 |
//if vertical snap position was already found and this rect's horizontal edges lies in line with Horizontal snap line
|
|
682 |
if (mVerticalSnapFound && mRectHorizontalEdgeLiesInLineWithHorizontalLine) {
|
|
683 |
if (mRectLieLeftOfHorizontalLine || mRectLiesRightOfHorizontalLine) {
|
|
684 |
extendHorizontalLineToIncludeInactiveRect();
|
|
685 |
}
|
|
686 |
}
|
|
687 |
else {
|
|
688 |
//Prioritize first on the fact if the inactive rect is closer to the moving rect in X - direction.
|
|
689 |
if (mHorizontalDistance < mHorizontalDistanceFromSelectedRect) {
|
|
690 |
verticalSnappingBetterFit = true;
|
|
691 |
}
|
|
692 |
else if (mHorizontalDistance == mHorizontalDistanceFromSelectedRect) {
|
|
693 |
//Prioritize next if this Inactive rect is closer to the top edge of the container rect, then the previously selected rect
|
|
694 |
if (differenceContainerTopEdgeToInactiveRectTopEdge < mContainerHorizontalEdgeDistance) {
|
|
695 |
verticalSnappingBetterFit = true;
|
|
696 |
}
|
|
697 |
//Prioritize next if the Inactive widget's top edge lies near to top edge of the container rect
|
|
698 |
else if (differenceContainerTopEdgeToInactiveRectTopEdge < differenceContainerBottomEdgeToInactiveRectBottomEdge) {
|
|
699 |
verticalSnappingBetterFit = true;
|
|
700 |
}
|
|
701 |
else {
|
|
702 |
//This else will happen if this rectangle being compared is exactly the same as the selected rectangle for snapping, or in opposite X direction.
|
|
703 |
//In that case it does not matter which is the selected rectangle. Hence we leave the already selected rectangle as the better fit.
|
|
704 |
}
|
|
705 |
}
|
|
706 |
}
|
|
707 |
}
|
|
708 |
}
|
|
709 |
|
|
710 |
if (verticalSnappingBetterFit) {
|
|
711 |
qreal proposedBottomOfActiveRect = minDistancePosition + mActiveRectHeight + ySnapGapAdjustment;
|
|
712 |
if (qBound(mContainerRect.top(), proposedBottomOfActiveRect, mContainerRect.bottom())
|
|
713 |
== proposedBottomOfActiveRect) {
|
|
714 |
mVerticalSnapFound = true;
|
|
715 |
mVerticalSnapPosition = minDistancePosition + ySnapGapAdjustment;
|
|
716 |
mMinHorizontalEdgesDistance = distanceHorizontalEdges;
|
|
717 |
mHorizontalDistanceFromSelectedRect = mHorizontalDistance;
|
|
718 |
//Save the new distance of the Chosen Rectangle's top edge from Container's top edge
|
|
719 |
mContainerHorizontalEdgeDistance = differenceContainerTopEdgeToInactiveRectTopEdge;
|
|
720 |
|
|
721 |
if (mRectLieLeft) {
|
|
722 |
//save the points for the Horizontal line
|
|
723 |
mHorizontalLine.setP1(QPointF(mInactiveRectToCompare.left(), minDistancePosition));
|
|
724 |
mHorizontalLine.setP2(QPointF(mMovingRect.right(), minDistancePosition));
|
|
725 |
}
|
|
726 |
else {
|
|
727 |
//save the points for the Horizontal line
|
|
728 |
mHorizontalLine.setP1(QPointF(mInactiveRectToCompare.right(), minDistancePosition));
|
|
729 |
mHorizontalLine.setP2(QPointF(mMovingRect.left(), minDistancePosition));
|
|
730 |
}
|
|
731 |
}
|
|
732 |
}
|
|
733 |
}
|
|
734 |
|
|
735 |
/*!
|
|
736 |
Check if the bottom edge of moving rect is snappable to the incative rect's top or bottom edge.
|
|
737 |
The inactive rect's edge is only chosen if it is a better fit for vertical snapping.
|
|
738 |
*/
|
|
739 |
void HsSnapToLines::compareBottomOfMovingRectForSnapping()
|
|
740 |
{
|
|
741 |
//Check if the inactive rect lies to the left or right of the moving rect
|
|
742 |
checkInactiveRectLieLeftOrRightOfMovingRect();
|
|
743 |
|
|
744 |
//calculate the distance of the moving rect's bottom edge to the inactive rect's top and bottom edges
|
|
745 |
qreal bottomToTopOfInactiveRect = qAbs(mInactiveRectToCompare.top() - mMovingRect.bottom());
|
|
746 |
qreal bottomToBottomOfInactiveRect = qAbs(mInactiveRectToCompare.bottom() - mMovingRect.bottom());
|
|
747 |
mTopInRange = false;
|
|
748 |
mBottomInRange = false;
|
|
749 |
|
|
750 |
if (bottomToTopOfInactiveRect <= mMinHorizontalEdgesDistance) {
|
|
751 |
if (mRectLieLeft && mInactiveSnapRectToCompare.isTopSnapableForRight
|
|
752 |
|| !mRectLieLeft && mInactiveSnapRectToCompare.isTopSnapableForLeft) {
|
|
753 |
mTopInRange = true;
|
|
754 |
}
|
|
755 |
}
|
|
756 |
if (bottomToBottomOfInactiveRect <= mMinHorizontalEdgesDistance) {
|
|
757 |
if (mRectLieLeft && mInactiveSnapRectToCompare.isBottomSnapableForRight
|
|
758 |
|| !mRectLieLeft && mInactiveSnapRectToCompare.isBottomSnapableForLeft) {
|
|
759 |
mBottomInRange = true;
|
|
760 |
}
|
|
761 |
}
|
|
762 |
|
|
763 |
//calculate the distance of inactive rect's top edge and container rect's top edge
|
|
764 |
qreal differenceContainerTopEdgeToInactiveRectTopEdge = mInactiveRectToCompare.top() - mContainerRect.top();
|
|
765 |
//calculate the distance of inactive rect's bottom edge and container rect's bottom edge
|
|
766 |
qreal differenceContainerBottomEdgeToInactiveRectBottomEdge = mContainerRect.bottom() - mInactiveRectToCompare.bottom();
|
|
767 |
qreal minDistancePosition = 0.0;
|
|
768 |
qreal distanceHorizontalEdges = 0.0;
|
|
769 |
qreal ySnapGapAdjustment = 0.0;
|
|
770 |
|
|
771 |
//If only one edge of inactive rect is in snappable range, save that position
|
|
772 |
if ((mTopInRange && !mBottomInRange)
|
|
773 |
|| !mTopInRange && mBottomInRange) {
|
|
774 |
if (mTopInRange) {
|
|
775 |
minDistancePosition = mInactiveRectToCompare.top();
|
|
776 |
distanceHorizontalEdges = bottomToTopOfInactiveRect;
|
|
777 |
ySnapGapAdjustment = mSnapGap;
|
|
778 |
}
|
|
779 |
else {
|
|
780 |
minDistancePosition = mInactiveRectToCompare.bottom();
|
|
781 |
distanceHorizontalEdges = bottomToBottomOfInactiveRect;
|
|
782 |
ySnapGapAdjustment = 0.0;
|
|
783 |
}
|
|
784 |
}
|
|
785 |
//else both edges of inactive rect are in range, check which is a better fit
|
|
786 |
else if (mTopInRange && mBottomInRange) {
|
|
787 |
//if bottom edge of moving rect to the bottom of inactive rect is closer than the bottom edge of moving rect to the top of the inactive rect
|
|
788 |
if (bottomToBottomOfInactiveRect < bottomToTopOfInactiveRect ) {
|
|
789 |
minDistancePosition = mInactiveRectToCompare.bottom();
|
|
790 |
distanceHorizontalEdges = bottomToBottomOfInactiveRect;
|
|
791 |
ySnapGapAdjustment = 0.0;
|
|
792 |
mTopInRange = false;
|
|
793 |
}
|
|
794 |
//if bottom edge of moving rect to the bottom of inactive rect is at the same distance as the bottom edge of moving rect to the top of inactive rect
|
|
795 |
else if (bottomToBottomOfInactiveRect == bottomToTopOfInactiveRect) {
|
|
796 |
//if inactive rect lies towards the bottom of container rect, then the bottom edge is priortized as the selected edge for snapping
|
|
797 |
//This is done for outside snapping
|
|
798 |
if (differenceContainerBottomEdgeToInactiveRectBottomEdge < differenceContainerTopEdgeToInactiveRectTopEdge) {
|
|
799 |
minDistancePosition = mInactiveRectToCompare.bottom();
|
|
800 |
distanceHorizontalEdges = bottomToBottomOfInactiveRect;
|
|
801 |
ySnapGapAdjustment = 0.0;
|
|
802 |
mTopInRange = false;
|
|
803 |
}
|
|
804 |
//else top of the inactive rect lies more close to the top of the container rect or at the same distance, and hence prioritize it
|
|
805 |
else {
|
|
806 |
minDistancePosition = mInactiveRectToCompare.top();
|
|
807 |
distanceHorizontalEdges = bottomToTopOfInactiveRect;
|
|
808 |
ySnapGapAdjustment = mSnapGap;
|
|
809 |
mBottomInRange = false;
|
|
810 |
}
|
|
811 |
}
|
|
812 |
//else bottom edge of moving rect to the top of inactive rect is closer than the bottom edge of moving rect to the bottom of the inactive rect
|
|
813 |
else{
|
|
814 |
minDistancePosition = mInactiveRectToCompare.top();
|
|
815 |
distanceHorizontalEdges = bottomToTopOfInactiveRect;
|
|
816 |
ySnapGapAdjustment = mSnapGap;
|
|
817 |
mBottomInRange = false;
|
|
818 |
}
|
|
819 |
}
|
|
820 |
|
|
821 |
//Check if this inactive rect is better fit than the previous selected rect
|
|
822 |
bool verticalSnappingBetterFit = false;
|
|
823 |
if (mTopInRange || mBottomInRange) {
|
|
824 |
if (distanceHorizontalEdges < mMinHorizontalEdgesDistance) {
|
|
825 |
verticalSnappingBetterFit = true;
|
|
826 |
}
|
|
827 |
else if (distanceHorizontalEdges == mMinHorizontalEdgesDistance) { //the distance in the horizontal edge is same as from the selected rectangle
|
|
828 |
//check the position of rect with respect to horizontal line
|
|
829 |
checkInactiveRectPositionToHorizontalLine();
|
|
830 |
//if vertical snap was already found and the horizontal line of rect is in line with horizontal snap line
|
|
831 |
if (mVerticalSnapFound && mRectHorizontalEdgeLiesInLineWithHorizontalLine) {
|
|
832 |
if (mRectLieLeftOfHorizontalLine || mRectLiesRightOfHorizontalLine) {
|
|
833 |
extendHorizontalLineToIncludeInactiveRect();
|
|
834 |
}
|
|
835 |
}
|
|
836 |
else {
|
|
837 |
//Prioritize first on the fact if the inactive rect is closer to the moving rect in X - direction.
|
|
838 |
if (mHorizontalDistance < mHorizontalDistanceFromSelectedRect) {
|
|
839 |
verticalSnappingBetterFit = true;
|
|
840 |
}
|
|
841 |
else if (mHorizontalDistance == mHorizontalDistanceFromSelectedRect) {
|
|
842 |
//Prioritize next if this Inactive rect is closer to the bottom edge of the container rect, then the previously selected rect
|
|
843 |
if (differenceContainerBottomEdgeToInactiveRectBottomEdge < mContainerHorizontalEdgeDistance) {
|
|
844 |
verticalSnappingBetterFit = true;
|
|
845 |
}
|
|
846 |
//Prioritize next if the Inactive widget's bottom edge lies near to bottom edge of the container rect
|
|
847 |
else if (differenceContainerBottomEdgeToInactiveRectBottomEdge < differenceContainerTopEdgeToInactiveRectTopEdge) {
|
|
848 |
verticalSnappingBetterFit = true;
|
|
849 |
}
|
|
850 |
else {
|
|
851 |
//This else will happen if this rectangle being compared is exactly the same as the selected rectangle for snapping, or in opposite X direction.
|
|
852 |
//In that case it does not matter which is the selected rectangle. Hence we leave the already selected rectangle as the better fit.
|
|
853 |
}
|
|
854 |
}
|
|
855 |
}
|
|
856 |
}
|
|
857 |
}
|
|
858 |
|
|
859 |
if (verticalSnappingBetterFit) {
|
|
860 |
qreal proposedTopOfActiveRect = minDistancePosition - mActiveRectHeight - ySnapGapAdjustment;
|
|
861 |
if (qBound(mContainerRect.top(), proposedTopOfActiveRect, mContainerRect.bottom())
|
|
862 |
== proposedTopOfActiveRect) {
|
|
863 |
mVerticalSnapFound = true;
|
|
864 |
mVerticalSnapPosition = proposedTopOfActiveRect;
|
|
865 |
mMinHorizontalEdgesDistance = distanceHorizontalEdges;
|
|
866 |
mHorizontalDistanceFromSelectedRect = mHorizontalDistance;
|
|
867 |
//Save the new distance of the Selected Rectangle's bottom edge from Container's bottom edge
|
|
868 |
mContainerHorizontalEdgeDistance = differenceContainerBottomEdgeToInactiveRectBottomEdge;
|
|
869 |
|
|
870 |
if (mRectLieLeft) {
|
|
871 |
//save the points for the Horizontal line
|
|
872 |
mHorizontalLine.setP1(QPointF(mInactiveRectToCompare.left(), minDistancePosition));
|
|
873 |
mHorizontalLine.setP2(QPointF(mMovingRect.right(), minDistancePosition));
|
|
874 |
}
|
|
875 |
else {
|
|
876 |
//save the points for the Horizontal line
|
|
877 |
mHorizontalLine.setP1(QPointF(mInactiveRectToCompare.right(), minDistancePosition));
|
|
878 |
mHorizontalLine.setP2(QPointF(mMovingRect.left(), minDistancePosition));
|
|
879 |
}
|
|
880 |
}
|
|
881 |
}
|
|
882 |
}
|
|
883 |
|
|
884 |
/*!
|
|
885 |
Extend the Vertical line on both side of reference(snapping) rectancles.
|
|
886 |
*/
|
|
887 |
void HsSnapToLines::extendVerticalLine()
|
|
888 |
{
|
|
889 |
if (mVerticalLine.y1() <= mVerticalLine.y2()) {
|
|
890 |
mVerticalLine.setP1(QPointF(mVerticalLine.x1(), mVerticalLine.y1() - SNAP_LINE_EXTEND_VALUE));
|
|
891 |
mVerticalLine.setP2(QPointF(mVerticalLine.x2(), mVerticalLine.y2() + SNAP_LINE_EXTEND_VALUE));
|
|
892 |
}
|
|
893 |
else {
|
|
894 |
mVerticalLine.setP1(QPointF(mVerticalLine.x1(), mVerticalLine.y1() + SNAP_LINE_EXTEND_VALUE));
|
|
895 |
mVerticalLine.setP2(QPointF(mVerticalLine.x2(), mVerticalLine.y2() - SNAP_LINE_EXTEND_VALUE));
|
|
896 |
}
|
|
897 |
}
|
|
898 |
|
|
899 |
/*!
|
|
900 |
Extend the Horizontal line on both side of reference(snapping) rectancles.
|
|
901 |
*/
|
|
902 |
void HsSnapToLines::extendHorizontalLine()
|
|
903 |
{
|
|
904 |
if (mHorizontalLine.x1() <= mHorizontalLine.x2()) {
|
|
905 |
mHorizontalLine.setP1(QPointF(mHorizontalLine.x1() - SNAP_LINE_EXTEND_VALUE, mHorizontalLine.y1()));
|
|
906 |
mHorizontalLine.setP2(QPointF(mHorizontalLine.x2() + SNAP_LINE_EXTEND_VALUE, mHorizontalLine.y2()));
|
|
907 |
}
|
|
908 |
else {
|
|
909 |
mHorizontalLine.setP1(QPointF(mHorizontalLine.x1() + SNAP_LINE_EXTEND_VALUE, mHorizontalLine.y1()));
|
|
910 |
mHorizontalLine.setP2(QPointF(mHorizontalLine.x2() - SNAP_LINE_EXTEND_VALUE, mHorizontalLine.y2()));
|
|
911 |
}
|
|
912 |
}
|
|
913 |
|
|
914 |
/*!
|
|
915 |
Check if the Vertical edge of the Rectangle lies out of the Vertical line.
|
|
916 |
Also check if the rectangle's edge lies out of the line.
|
|
917 |
*/
|
|
918 |
void HsSnapToLines::checkInactiveRectPositionToVerticalLine()
|
|
919 |
{
|
|
920 |
mRectVerticalEdgeLiesInLineWithVerticalLine = false;
|
|
921 |
mRectLieAboveVerticalLine = false;
|
|
922 |
mRectLieBelowVerticalLine = false;
|
|
923 |
|
|
924 |
//if rectangle vertical edge lies inline with Vertical line.
|
|
925 |
if ((mLeftInRange && mInactiveRectToCompare.left() == mVerticalLine.x1())
|
|
926 |
|| (mRightInRange && mInactiveRectToCompare.right() == mVerticalLine.x1())) {
|
|
927 |
mRectVerticalEdgeLiesInLineWithVerticalLine = true;
|
|
928 |
//if the rectangle lies below the vertical line
|
|
929 |
if (mInactiveRectToCompare.bottom() > mVerticalLine.y1() && mInactiveRectToCompare.bottom() > mVerticalLine.y2()) {
|
|
930 |
mRectLieBelowVerticalLine = true;
|
|
931 |
}
|
|
932 |
//if the rectangle lies above the vertical line
|
|
933 |
if (mInactiveRectToCompare.top() < mVerticalLine.y1() && mInactiveRectToCompare.top() < mVerticalLine.y2()) {
|
|
934 |
mRectLieAboveVerticalLine = true;
|
|
935 |
}
|
|
936 |
}
|
|
937 |
}
|
|
938 |
|
|
939 |
/*!
|
|
940 |
Increase the Vertical line to include the inactive rect whose vertical edge is inline with vertical line
|
|
941 |
*/
|
|
942 |
void HsSnapToLines::extendVerticalLineToIncludeInactiveRect()
|
|
943 |
{
|
|
944 |
if (mRectLieAboveVerticalLine) {
|
|
945 |
if (mVerticalLine.y1() < mVerticalLine.y2()) {
|
|
946 |
mVerticalLine.setP1(QPointF(mVerticalLine.x1(), mInactiveRectToCompare.top()));
|
|
947 |
}
|
|
948 |
else {
|
|
949 |
mVerticalLine.setP2(QPointF(mVerticalLine.x1(), mInactiveRectToCompare.top()));
|
|
950 |
}
|
|
951 |
}
|
|
952 |
if (mRectLieBelowVerticalLine) {
|
|
953 |
if (mVerticalLine.y1() < mVerticalLine.y2()) {
|
|
954 |
mVerticalLine.setP2(QPointF(mVerticalLine.x1(), mInactiveRectToCompare.bottom()));
|
|
955 |
}
|
|
956 |
else {
|
|
957 |
mVerticalLine.setP1(QPointF(mVerticalLine.x1(), mInactiveRectToCompare.bottom()));
|
|
958 |
}
|
|
959 |
}
|
|
960 |
}
|
|
961 |
|
|
962 |
/*!
|
|
963 |
Check if the Horizontal edge of the Rectangle lies inline with the Horizontal line.
|
|
964 |
Also check if the rectangle's edge lies out of the line.
|
|
965 |
*/
|
|
966 |
void HsSnapToLines::checkInactiveRectPositionToHorizontalLine()
|
|
967 |
{
|
|
968 |
mRectHorizontalEdgeLiesInLineWithHorizontalLine = false;
|
|
969 |
mRectLieLeftOfHorizontalLine = false;
|
|
970 |
mRectLiesRightOfHorizontalLine = false;
|
|
971 |
|
|
972 |
//if rectangle horizontal edge lies inline with Horizontal line.
|
|
973 |
if ((mTopInRange && mInactiveRectToCompare.top() == mHorizontalLine.y1())
|
|
974 |
|| (mBottomInRange && mInactiveRectToCompare.bottom() == mHorizontalLine.y1())) {
|
|
975 |
mRectHorizontalEdgeLiesInLineWithHorizontalLine = true;
|
|
976 |
//if the rectangle lies left of the horizontal line
|
|
977 |
if (mInactiveRectToCompare.left() < mHorizontalLine.x1() && mInactiveRectToCompare.left() < mHorizontalLine.x2()) {
|
|
978 |
mRectLieLeftOfHorizontalLine = true;
|
|
979 |
}
|
|
980 |
//if the rectangle lies right of the horizontal line
|
|
981 |
if (mInactiveRectToCompare.right() > mHorizontalLine.x1() && mInactiveRectToCompare.right() > mHorizontalLine.x2()) {
|
|
982 |
mRectLiesRightOfHorizontalLine = true;
|
|
983 |
}
|
|
984 |
}
|
|
985 |
}
|
|
986 |
|
|
987 |
/*!
|
|
988 |
Increase the Horizontal line to include the inactive rect whose horizontal edge is inline with horizontal line
|
|
989 |
*/
|
|
990 |
void HsSnapToLines::extendHorizontalLineToIncludeInactiveRect()
|
|
991 |
{
|
|
992 |
if (mRectLieLeftOfHorizontalLine) {
|
|
993 |
if (mHorizontalLine.x1() < mHorizontalLine.x2()) {
|
|
994 |
mHorizontalLine.setP1(QPointF(mInactiveRectToCompare.left(), mHorizontalLine.y1()));
|
|
995 |
}
|
|
996 |
else {
|
|
997 |
mHorizontalLine.setP2(QPointF(mInactiveRectToCompare.left(), mHorizontalLine.y1()));
|
|
998 |
}
|
|
999 |
}
|
|
1000 |
if (mRectLiesRightOfHorizontalLine) {
|
|
1001 |
if (mHorizontalLine.x1() < mHorizontalLine.x2()) {
|
|
1002 |
mHorizontalLine.setP2(QPointF(mInactiveRectToCompare.right(), mHorizontalLine.y1()));
|
|
1003 |
}
|
|
1004 |
else {
|
|
1005 |
mHorizontalLine.setP1(QPointF(mInactiveRectToCompare.right(), mHorizontalLine.y1()));
|
|
1006 |
}
|
|
1007 |
}
|
|
1008 |
}
|