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 <QFontMetrics>
22 #include <QGraphicsSceneMouseEvent>
24 #include <QTextLayout>
27 #include "chatlinemodel.h"
30 ChatItem::ChatItem(const QPersistentModelIndex &index_, QGraphicsItem *parent) : QGraphicsItem(parent), _index(index_) {
31 _fontMetrics = QtUi::style()->fontMetrics(data(ChatLineModel::FormatRole).value<UiStyle::FormatList>().at(0).second);
36 ChatItem::~ChatItem() {
40 QVariant ChatItem::data(int role) const {
41 if(!_index.isValid()) {
42 qWarning() << "ChatItem::data(): Model index is invalid!" << _index;
45 return _index.data(role);
48 int ChatItem::setWidth(int w) {
50 if(w == _boundingRect.width()) return _boundingRect.height();
51 _boundingRect.setWidth(w);
52 int h = heightForWidth(w);
53 _boundingRect.setHeight(h);
54 if(haveLayout()) updateLayout();
58 int ChatItem::heightForWidth(int width) {
59 if(data(ChatLineModel::ColumnTypeRole).toUInt() != ChatLineModel::ContentsColumn)
60 return fontMetrics()->lineSpacing(); // only contents can be multi-line
64 WrapColumnFinder finder(this);
65 while(finder.nextWrapColumn(line) > 0) _lines++;
66 return _lines * fontMetrics()->lineSpacing();
69 ChatItem::WrapColumnFinder::WrapColumnFinder(ChatItem *_item) : item(_item) {
70 wrapList = item->data(ChatLineModel::WrapListRole).value<ChatLineModel::WrapList>();
78 ChatItem::WrapColumnFinder::~WrapColumnFinder() {
82 int ChatItem::WrapColumnFinder::nextWrapColumn(QTextLine &line) {
83 while(wordidx < wrapList.count()) {
84 w += wrapList.at(wordidx).width;
85 if(w >= item->width()) {
86 if(lastwrapcol == wrapList.at(wordidx).start) {
87 // first word, and it doesn't fit
89 layout = item->createLayout();
90 layout->beginLayout();
91 line = layout->createLine();
92 line.setLineWidth(item->width());
95 int idx = line.xToCursor((line.textStart() ? 0 : lastwrappos) + item->width());
96 qreal x = line.cursorToX(idx);
97 idx += line.textStart();
98 w = w - x - wrapList.at(wordidx).width;
99 if(line.textStart()) lastwrappos += x;
100 else lastwrappos = x;
104 // not the first word, so just wrap before this
105 lastwrapcol = wrapList.at(wordidx).start;
106 lastwrappos = lastwrappos + w - wrapList.at(wordidx).width;
110 w += wrapList.at(wordidx).trailing;
116 QTextLayout *ChatItem::createLayout() {
117 QTextLayout *layout = new QTextLayout(data(MessageModel::DisplayRole).toString());
120 option.setWrapMode(QTextOption::WrapAnywhere);
121 layout->setTextOption(option);
123 QList<QTextLayout::FormatRange> formatRanges
124 = QtUi::style()->toTextLayoutList(data(MessageModel::FormatRole).value<UiStyle::FormatList>(), layout->text().length());
125 layout->setAdditionalFormats(formatRanges);
129 void ChatItem::updateLayout() {
130 if(!haveLayout()) _layout = createLayout();
133 ChatLineModel::WrapList wrapList = data(ChatLineModel::WrapListRole).value<ChatLineModel::WrapList>();
134 if(!wrapList.count()) return; // empty chatitem
136 ChatLineModel::Word word = wrapList.at(0);
139 WrapColumnFinder finder(this);
140 _layout->beginLayout();
142 QTextLine line = _layout->createLine();
146 int col = finder.nextWrapColumn(line);
147 line.setNumColumns(col >= 0 ? col - line.textStart() : _layout->text().length());
149 h += fontMetrics()->leading();
150 line.setPosition(QPointF(0, h));
153 _layout->endLayout();
156 void ChatItem::clearLayout() {
161 //int ChatItem::findNextWrapColumn(
163 void ChatItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) {
164 Q_UNUSED(option); Q_UNUSED(widget);
165 if(!haveLayout()) updateLayout();
166 _layout->draw(painter, QPointF(0,0), QVector<QTextLayout::FormatRange>(), boundingRect());
167 painter->drawRect(boundingRect());
169 QVariantList wrapList = data(ChatLineModel::WrapListRole).toList();
170 for(int i = 2; i < wrapList.count(); i+=2) {
171 QRect r(wrapList[i-1].toUInt(), 0, wrapList[i+1].toUInt() - wrapList[i-1].toUInt(), fontMetrics()->lineSpacing());
172 painter->drawRect(r);
178 void ChatItem::layout() {
179 if(!_layout.additionalFormats().count()) return; // no text set
180 if(_width <= 0) return;
181 prepareGeometryChange();
182 QFontMetrics metrics(_layout.additionalFormats()[0].format.font());
183 int leading = metrics.leading();
185 _layout.setTextOption(textOption());
186 _layout.beginLayout();
188 QTextLine line = _layout.createLine();
189 if(!line.isValid()) break;
190 line.setLineWidth(_width);
191 if(textOption().wrapMode() != QTextOption::NoWrap && line.naturalTextWidth() > _width) {
192 // word did not fit, we need to wrap it in the middle
193 // this is a workaround for Qt failing to handle WrapAtWordBoundaryOrAnywhere correctly
194 QTextOption::WrapMode mode = textOption().wrapMode();
195 textOption().setWrapMode(QTextOption::WrapAnywhere);
196 _layout.setTextOption(textOption());
197 line.setLineWidth(_width);
198 textOption().setWrapMode(mode);
199 _layout.setTextOption(textOption());
202 line.setPosition(QPoint(0, height));
203 height += line.height();
207 } QDateTime _timestamp;
211 QRectF ChatItem::boundingRect() const {
212 return _layout.boundingRect();
215 void ChatItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) {
216 Q_UNUSED(option); Q_UNUSED(widget);
217 _layout.draw(painter, QPointF(0, 0));
223 void ChatItem::mouseMoveEvent ( QGraphicsSceneMouseEvent * event ) {
224 qDebug() << (void*)this << "moving" << event->pos();
225 if(event->pos().y() < 0) {
226 QTextCursor cursor(document());
227 //cursor.insertText("foo");
228 //cursor.select(QTextCursor::Document);
230 } else QGraphicsTextItem::mouseMoveEvent(event);