1 /***************************************************************************
2 * Copyright (C) 2005-2012 by the Quassel Project *
3 * devel@quassel-irc.org *
5 * This program is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU General Public License as published by *
7 * the Free Software Foundation; either version 2 of the License, or *
8 * (at your option) version 3. *
10 * This program is distributed in the hope that it will be useful, *
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13 * GNU General Public License for more details. *
15 * You should have received a copy of the GNU General Public License *
16 * along with this program; if not, write to the *
17 * Free Software Foundation, Inc., *
18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
19 ***************************************************************************/
22 #include "columnhandleitem.h"
24 #include <QApplication>
26 #include <QGraphicsSceneHoverEvent>
30 ColumnHandleItem::ColumnHandleItem(qreal w, QGraphicsItem *parent)
31 : QGraphicsObject(parent),
33 _boundingRect(-_width/2, 0, _width, 0),
39 _animation(new QPropertyAnimation(this, "opacity", this))
42 setAcceptsHoverEvents(true);
44 setCursor(QCursor(Qt::OpenHandCursor));
46 _animation->setStartValue(0);
47 _animation->setEndValue(1);
48 _animation->setDirection(QPropertyAnimation::Forward);
49 _animation->setDuration(350);
50 _animation->setEasingCurve(QEasingCurve::InOutSine);
52 //connect(&_timeLine, SIGNAL(valueChanged(qreal)), this, SLOT(hoverChanged(qreal)));
55 void ColumnHandleItem::setXPos(qreal xpos) {
57 QRectF sceneBRect = _boundingRect.translated(x(), 0);
58 _sceneLeft = sceneBRect.left();
59 _sceneRight = sceneBRect.right();
62 void ColumnHandleItem::setXLimits(qreal min, qreal max) {
65 //if(x() < min) setPos(min, 0);
66 //else if(x() > max) setPos(max - width(), 0);
69 void ColumnHandleItem::sceneRectChanged(const QRectF &rect) {
70 prepareGeometryChange();
71 _boundingRect = QRectF(-_width/2, rect.y(), _width, rect.height());
74 void ColumnHandleItem::setOpacity(qreal opacity) {
79 void ColumnHandleItem::mouseMoveEvent(QGraphicsSceneMouseEvent *event) {
80 if(event->buttons() & Qt::LeftButton && _moving) {
81 qreal newx = event->scenePos().x() - _offset;
84 else if(newx + width() > _maxXPos)
85 newx = _maxXPos - width();
93 void ColumnHandleItem::mousePressEvent(QGraphicsSceneMouseEvent *event) {
94 if(event->buttons() & Qt::LeftButton) {
95 QApplication::setOverrideCursor(Qt::ClosedHandCursor);
97 _offset = event->pos().x();
104 void ColumnHandleItem::mouseReleaseEvent(QGraphicsSceneMouseEvent *event) {
107 QRectF sceneBRect = _boundingRect.translated(x(), 0);
108 _sceneLeft = sceneBRect.left();
109 _sceneRight = sceneBRect.right();
110 emit positionChanged(x());
111 QApplication::restoreOverrideCursor();
118 void ColumnHandleItem::hoverEnterEvent(QGraphicsSceneHoverEvent *event) {
121 _animation->setDirection(QPropertyAnimation::Forward);
125 void ColumnHandleItem::hoverLeaveEvent(QGraphicsSceneHoverEvent *event) {
128 _animation->setDirection(QPropertyAnimation::Backward);
132 void ColumnHandleItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) {
136 QLinearGradient gradient(boundingRect().topLeft(), boundingRect().topRight());
137 QColor color = QApplication::palette().windowText().color();
138 color.setAlphaF(_opacity);
139 gradient.setColorAt(0, Qt::transparent);
140 gradient.setColorAt(0.45, color);
141 gradient.setColorAt(0.55, color);
142 gradient.setColorAt(1, Qt::transparent);
143 painter->fillRect(boundingRect(), gradient);