1 /***************************************************************************
2 * Copyright (C) 2005-08 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 ***************************************************************************/
21 #include <QGraphicsTextItem>
25 #include "bufferwidget.h"
26 #include "chatlinemodelitem.h"
27 #include "chatscene.h"
30 #include "messagefilter.h"
31 #include "quasselui.h"
33 ChatView::ChatView(BufferId bufferId, QWidget *parent)
34 : QGraphicsView(parent),
37 _currentScaleFactor(1)
39 QList<BufferId> filterList;
40 filterList.append(bufferId);
41 MessageFilter *filter = new MessageFilter(Client::messageModel(), filterList, this);
45 ChatView::ChatView(MessageFilter *filter, QWidget *parent)
46 : QGraphicsView(parent),
48 _currentScaleFactor(1)
53 void ChatView::init(MessageFilter *filter) {
54 setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
55 setAlignment(Qt::AlignBottom);
57 //setOptimizationFlags(QGraphicsView::DontClipPainter | QGraphicsView::DontAdjustForAntialiasing);
58 // setOptimizationFlags(QGraphicsView::DontAdjustForAntialiasing);
59 setViewportUpdateMode(QGraphicsView::BoundingRectViewportUpdate);
60 // setTransformationAnchor(QGraphicsView::NoAnchor);
61 setTransformationAnchor(QGraphicsView::AnchorViewCenter);
63 _scrollTimer.setInterval(100);
64 _scrollTimer.setSingleShot(true);
65 connect(&_scrollTimer, SIGNAL(timeout()), SLOT(scrollTimerTimeout()));
67 _scene = new ChatScene(filter, filter->idString(), viewport()->width() - 4, this); // see below: resizeEvent()
68 connect(_scene, SIGNAL(sceneRectChanged(const QRectF &)), this, SLOT(sceneRectChanged(const QRectF &)));
69 connect(_scene, SIGNAL(lastLineChanged(QGraphicsItem *, qreal)), this, SLOT(lastLineChanged(QGraphicsItem *, qreal)));
70 connect(_scene, SIGNAL(mouseMoveWhileSelecting(const QPointF &)), this, SLOT(mouseMoveWhileSelecting(const QPointF &)));
72 // installEventFilter(_scene);
74 connect(verticalScrollBar(), SIGNAL(valueChanged(int)), this, SLOT(verticalScrollbarChanged(int)));
77 void ChatView::resizeEvent(QResizeEvent *event) {
78 QGraphicsView::resizeEvent(event);
80 // we can reduce viewport updates if we scroll to the bottom allready at the beginning
81 verticalScrollBar()->setValue(verticalScrollBar()->maximum());
83 // FIXME: without the hardcoded -4 Qt reserves space for a horizontal scrollbar even though it's disabled permanently.
84 // this does only occur on QtX11 (at least not on Qt for Mac OS). Seems like a Qt Bug.
85 scene()->updateForViewport(viewport()->width() - 4, viewport()->height());
87 _lastScrollbarPos = verticalScrollBar()->maximum();
88 verticalScrollBar()->setValue(verticalScrollBar()->maximum());
91 void ChatView::mouseMoveWhileSelecting(const QPointF &scenePos) {
92 int y = (int)mapFromScene(scenePos).y();
97 _scrollOffset = y - height();
99 if(_scrollOffset && !_scrollTimer.isActive())
100 _scrollTimer.start();
103 void ChatView::scrollTimerTimeout() {
105 QAbstractSlider *vbar = verticalScrollBar();
106 if(_scrollOffset < 0 && vbar->value() > 0)
107 vbar->setValue(qMax(vbar->value() + _scrollOffset, 0));
108 else if(_scrollOffset > 0 && vbar->value() < vbar->maximum())
109 vbar->setValue(qMin(vbar->value() + _scrollOffset, vbar->maximum()));
112 void ChatView::lastLineChanged(QGraphicsItem *chatLine, qreal offset) {
114 // disabled until further testing/discussion
115 //if(!scene()->isScrollingAllowed())
118 QAbstractSlider *vbar = verticalScrollBar();
120 if(vbar->maximum() - vbar->value() <= (offset + 5) * _currentScaleFactor ) { // 5px grace area
121 vbar->setValue(vbar->maximum());
125 void ChatView::verticalScrollbarChanged(int newPos) {
126 QAbstractSlider *vbar = verticalScrollBar();
129 // check for backlog request
130 if(newPos < _lastScrollbarPos) {
131 int relativePos = 100;
132 if(vbar->maximum() - vbar->minimum() != 0)
133 relativePos = (newPos - vbar->minimum()) * 100 / (vbar->maximum() - vbar->minimum());
135 if(relativePos < 20) {
136 scene()->requestBacklog();
139 _lastScrollbarPos = newPos;
142 MsgId ChatView::lastMsgId() const {
146 QAbstractItemModel *model = scene()->model();
147 if(!model || model->rowCount() == 0)
150 return model->data(model->index(model->rowCount() - 1, 0), MessageModel::MsgIdRole).value<MsgId>();
153 void ChatView::addActionsToMenu(QMenu *menu) {
155 BufferWidget *bw = qobject_cast<BufferWidget *>(bufferContainer());
157 bw->addActionsToMenu(menu);
158 menu->addSeparator();
162 void ChatView::zoomIn() {
163 _currentScaleFactor *= 1.2;
165 scene()->setWidth(viewport()->width() / _currentScaleFactor - 2);
168 void ChatView::zoomOut() {
169 _currentScaleFactor /= 1.2;
170 scale(1 / 1.2, 1 / 1.2);
171 scene()->setWidth(viewport()->width() / _currentScaleFactor - 2);
174 void ChatView::zoomOriginal() {
175 scale(1/_currentScaleFactor, 1/_currentScaleFactor);
176 _currentScaleFactor = 1;
177 scene()->setWidth(viewport()->width() - 2);