1/***************************************************************************
2 * Copyright (C) 2005-2014 by the Quassel Project *
3 * devel@quassel-irc.org *
4 * *
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. *
9 * *
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. *
14 * *
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 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
19 ***************************************************************************/
20
21#include "chatview.h"
22#include "columnhandleitem.h"
23
24#include <QApplication>
25#include <QCursor>
26#include <QGraphicsSceneHoverEvent>
27#include <QPainter>
28#include <QPalette>
29
30ColumnHandleItem::ColumnHandleItem(qreal w, QGraphicsItem *parent)
31 : QGraphicsObject(parent),
32 _width(w),
33 _boundingRect(-_width/2, 0, _width, 0),
34 _moving(false),
35 _offset(0),
36 _minXPos(0),
37 _maxXPos(0),
38 _opacity(0),
39 _animation(new QPropertyAnimation(this, "opacity", this))
40{
41 setAcceptHoverEvents(true);
42 setZValue(10);
43 setCursor(QCursor(Qt::OpenHandCursor));
44
45 _animation->setStartValue(0);
46 _animation->setEndValue(1);
47 _animation->setDirection(QPropertyAnimation::Forward);
48 _animation->setDuration(350);
49 _animation->setEasingCurve(QEasingCurve::InOutSine);
50
51 //connect(&_timeLine, SIGNAL(valueChanged(qreal)), this, SLOT(hoverChanged(qreal)));
52}
53
54
55void ColumnHandleItem::setXPos(qreal xpos)
56{
57 setPos(xpos, 0);
58 QRectF sceneBRect = _boundingRect.translated(x(), 0);
59 _sceneLeft = sceneBRect.left();
60 _sceneRight = sceneBRect.right();
61 emit positionChanged(xpos);
62}
63
64
65void ColumnHandleItem::setXLimits(qreal min, qreal max)
66{
67 _minXPos = min;
68 _maxXPos = max;
69 //if(x() < min) setPos(min, 0);
70 //else if(x() > max) setPos(max - width(), 0);
71}
72
73
74void ColumnHandleItem::sceneRectChanged(const QRectF &rect)
75{
76 prepareGeometryChange();
77 _boundingRect = QRectF(-_width/2, rect.y(), _width, rect.height());
78}
79
80
81void ColumnHandleItem::setOpacity(qreal opacity)
82{
83 _opacity = opacity;
84 update();
85}
86
87
88void ColumnHandleItem::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
89{
90 if (event->buttons() & Qt::LeftButton && _moving) {
91 qreal newx = event->scenePos().x() - _offset;
92 if (newx < _minXPos)
93 newx = _minXPos;
94 else if (newx + width() > _maxXPos)
95 newx = _maxXPos - width();
96 setPos(newx, 0);
97 event->accept();
98 }
99 else {
100 event->ignore();
101 }
102}
103
104
105void ColumnHandleItem::mousePressEvent(QGraphicsSceneMouseEvent *event)
106{
107 if (event->buttons() & Qt::LeftButton) {
108 QApplication::setOverrideCursor(Qt::ClosedHandCursor);
109 _moving = true;
110 _offset = event->pos().x();
111 event->accept();
112 }
113 else {
114 event->ignore();
115 }
116}
117
118
119void ColumnHandleItem::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
120{
121 if (_moving) {
122 _moving = false;
123 QRectF sceneBRect = _boundingRect.translated(x(), 0);
124 _sceneLeft = sceneBRect.left();
125 _sceneRight = sceneBRect.right();
126 emit positionChanged(x());
127 QApplication::restoreOverrideCursor();
128 event->accept();
129 }
130 else {
131 event->ignore();
132 }
133}
134
135
136void ColumnHandleItem::hoverEnterEvent(QGraphicsSceneHoverEvent *event)
137{
138 Q_UNUSED(event);
139
140 _animation->setDirection(QPropertyAnimation::Forward);
141 _animation->start();
142}
143
144
145void ColumnHandleItem::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
146{
147 Q_UNUSED(event);
148
149 _animation->setDirection(QPropertyAnimation::Backward);
150 _animation->start();
151}
152
153
154void ColumnHandleItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
155{
156 Q_UNUSED(option);
157 Q_UNUSED(widget);
158
159 QLinearGradient gradient(boundingRect().topLeft(), boundingRect().topRight());
160 QColor color = QApplication::palette().windowText().color();
161 color.setAlphaF(_opacity);
162 gradient.setColorAt(0, Qt::transparent);
163 gradient.setColorAt(0.45, color);
164 gradient.setColorAt(0.55, color);
165 gradient.setColorAt(1, Qt::transparent);
166 painter->fillRect(boundingRect(), gradient);
167}
168