1 /***************************************************************************
2 * Copyright (C) 2005-09 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>
26 #include "bufferwidget.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),
49 _currentScaleFactor(1)
54 void ChatView::init(MessageFilter *filter) {
55 setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
56 setAlignment(Qt::AlignBottom);
58 //setOptimizationFlags(QGraphicsView::DontClipPainter | QGraphicsView::DontAdjustForAntialiasing);
59 // setOptimizationFlags(QGraphicsView::DontAdjustForAntialiasing);
60 setViewportUpdateMode(QGraphicsView::BoundingRectViewportUpdate);
61 // setTransformationAnchor(QGraphicsView::NoAnchor);
62 setTransformationAnchor(QGraphicsView::AnchorViewCenter);
64 _scrollTimer.setInterval(100);
65 _scrollTimer.setSingleShot(true);
66 connect(&_scrollTimer, SIGNAL(timeout()), SLOT(scrollTimerTimeout()));
68 _scene = new ChatScene(filter, filter->idString(), viewport()->width() - 4, this); // see below: resizeEvent()
69 connect(_scene, SIGNAL(sceneRectChanged(const QRectF &)), this, SLOT(sceneRectChanged(const QRectF &)));
70 connect(_scene, SIGNAL(lastLineChanged(QGraphicsItem *, qreal)), this, SLOT(lastLineChanged(QGraphicsItem *, qreal)));
71 connect(_scene, SIGNAL(mouseMoveWhileSelecting(const QPointF &)), this, SLOT(mouseMoveWhileSelecting(const QPointF &)));
74 connect(verticalScrollBar(), SIGNAL(valueChanged(int)), this, SLOT(verticalScrollbarChanged(int)));
77 bool ChatView::event(QEvent *event) {
78 if(event->type() == QEvent::KeyPress) {
79 QKeyEvent *keyEvent = static_cast<QKeyEvent*>(event);
80 switch(keyEvent->key()) {
84 case Qt::Key_PageDown:
85 if(!verticalScrollBar()->isVisible()) {
86 scene()->requestBacklog();
94 if(event->type() == QEvent::Wheel) {
95 if(!verticalScrollBar()->isVisible()) {
96 scene()->requestBacklog();
101 return QGraphicsView::event(event);
104 void ChatView::resizeEvent(QResizeEvent *event) {
105 QGraphicsView::resizeEvent(event);
107 // we can reduce viewport updates if we scroll to the bottom allready at the beginning
108 verticalScrollBar()->setValue(verticalScrollBar()->maximum());
110 // FIXME: without the hardcoded -4 Qt reserves space for a horizontal scrollbar even though it's disabled permanently.
111 // this does only occur on QtX11 (at least not on Qt for Mac OS). Seems like a Qt Bug.
112 scene()->updateForViewport(viewport()->width() - 4, viewport()->height());
114 _lastScrollbarPos = verticalScrollBar()->maximum();
115 verticalScrollBar()->setValue(verticalScrollBar()->maximum());
118 void ChatView::mouseMoveWhileSelecting(const QPointF &scenePos) {
119 int y = (int)mapFromScene(scenePos).y();
123 else if(y > height())
124 _scrollOffset = y - height();
126 if(_scrollOffset && !_scrollTimer.isActive())
127 _scrollTimer.start();
130 void ChatView::scrollTimerTimeout() {
132 QAbstractSlider *vbar = verticalScrollBar();
133 if(_scrollOffset < 0 && vbar->value() > 0)
134 vbar->setValue(qMax(vbar->value() + _scrollOffset, 0));
135 else if(_scrollOffset > 0 && vbar->value() < vbar->maximum())
136 vbar->setValue(qMin(vbar->value() + _scrollOffset, vbar->maximum()));
139 void ChatView::lastLineChanged(QGraphicsItem *chatLine, qreal offset) {
141 // disabled until further testing/discussion
142 //if(!scene()->isScrollingAllowed())
145 QAbstractSlider *vbar = verticalScrollBar();
147 if(vbar->maximum() - vbar->value() <= (offset + 5) * _currentScaleFactor ) { // 5px grace area
148 vbar->setValue(vbar->maximum());
152 void ChatView::verticalScrollbarChanged(int newPos) {
153 QAbstractSlider *vbar = verticalScrollBar();
156 // check for backlog request
157 if(newPos < _lastScrollbarPos) {
158 int relativePos = 100;
159 if(vbar->maximum() - vbar->minimum() != 0)
160 relativePos = (newPos - vbar->minimum()) * 100 / (vbar->maximum() - vbar->minimum());
162 if(relativePos < 20) {
163 scene()->requestBacklog();
166 _lastScrollbarPos = newPos;
169 MsgId ChatView::lastMsgId() const {
173 QAbstractItemModel *model = scene()->model();
174 if(!model || model->rowCount() == 0)
177 return model->data(model->index(model->rowCount() - 1, 0), MessageModel::MsgIdRole).value<MsgId>();
180 void ChatView::addActionsToMenu(QMenu *menu, const QPointF &pos) {
182 BufferWidget *bw = qobject_cast<BufferWidget *>(bufferContainer());
184 bw->addActionsToMenu(menu, pos);
185 menu->addSeparator();
189 void ChatView::zoomIn() {
190 _currentScaleFactor *= 1.2;
192 scene()->setWidth(viewport()->width() / _currentScaleFactor - 2);
195 void ChatView::zoomOut() {
196 _currentScaleFactor /= 1.2;
197 scale(1 / 1.2, 1 / 1.2);
198 scene()->setWidth(viewport()->width() / _currentScaleFactor - 2);
201 void ChatView::zoomOriginal() {
202 scale(1/_currentScaleFactor, 1/_currentScaleFactor);
203 _currentScaleFactor = 1;
204 scene()->setWidth(viewport()->width() - 2);