faster ChatLine insertion into the ChatScene. And some minor improvements
[quassel.git] / src / qtui / chatview.cpp
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20
21 #include <QGraphicsTextItem>
22 #include <QScrollBar>
23
24 #include "chatlinemodelitem.h"
25 #include "chatscene.h"
26 #include "chatview.h"
27 #include "client.h"
28 #include "messagefilter.h"
29 #include "quasselui.h"
30
31 ChatView::ChatView(BufferId bufferId, QWidget *parent)
32   : QGraphicsView(parent),
33     AbstractChatView()
34 {
35   QList<BufferId> filterList;
36   filterList.append(bufferId);
37   MessageFilter *filter = new MessageFilter(Client::messageModel(), filterList, this);
38   init(filter);
39 }
40
41 ChatView::ChatView(MessageFilter *filter, QWidget *parent)
42   : QGraphicsView(parent),
43     AbstractChatView()
44 {
45   init(filter);
46 }
47
48 void ChatView::init(MessageFilter *filter) {
49   setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
50   setAlignment(Qt::AlignBottom);
51   setInteractive(true);
52
53   _scene = new ChatScene(filter, filter->idString(), viewport()->width(), this);
54   connect(_scene, SIGNAL(sceneHeightChanged(qreal)), this, SLOT(sceneHeightChanged(qreal)));
55   setScene(_scene);
56
57   _lastScrollbarPos = verticalScrollBar()->maximum();
58   connect(verticalScrollBar(), SIGNAL(valueChanged(int)), this, SLOT(verticalScrollbarChanged(int)));
59 }
60
61 void ChatView::resizeEvent(QResizeEvent *event) {
62 //   scene()->setWidth(event->size().width() - 2);  // FIXME figure out why we have to hardcode the -2 here
63   QGraphicsView::resizeEvent(event);
64   scene()->setWidth(viewport()->width());
65   verticalScrollBar()->setValue(verticalScrollBar()->maximum());
66 }
67
68 void ChatView::sceneHeightChanged(qreal dh) {
69   QAbstractSlider *vbar = verticalScrollBar();
70   Q_ASSERT(vbar);
71   if(vbar->maximum() - vbar->value() <= dh + 5) // in case we had scrolled only about half a line to the bottom we allow a grace of 5
72     vbar->setValue(vbar->maximum());
73 }
74
75 void ChatView::verticalScrollbarChanged(int newPos) {
76   QAbstractSlider *vbar = verticalScrollBar();
77   Q_ASSERT(vbar);
78
79   if(newPos < _lastScrollbarPos) {
80     int relativePos = 100;
81     if(vbar->maximum() - vbar->minimum() != 0)
82       relativePos = (newPos - vbar->minimum()) * 100 / (vbar->maximum() - vbar->minimum());
83
84     if(relativePos < 20) {
85       scene()->requestBacklog();
86     }
87   }
88   _lastScrollbarPos = newPos;
89 }
90
91 MsgId ChatView::lastMsgId() const {
92   if(!scene())
93     return MsgId();
94
95   QAbstractItemModel *model = scene()->model();
96   if(!model || model->rowCount() == 0)
97     return MsgId();
98
99   return model->data(model->index(model->rowCount() - 1, 0), MessageModel::MsgIdRole).value<MsgId>();
100 }